RCS-974AG - X - Instruction Manual - EN - General - X - R1.01 - (EN - YJBH1201.0086.0002) PDF [PDF]

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RCS-974AG Transformer Auxiliary Relay Instruction Manual



NR Electric Co., Ltd.



RCS-974AG Transformer Auxiliary Relay



Preface Introduction This guide and the relevant operating or service manual documentation for the equipment provide full information on safe handling, commissioning and testing of this equipment. Documentation for equipment ordered from NR is dispatched separately from manufactured goods and may not be received at the same time. Therefore this guide is provided to ensure that printed information normally present on equipment is fully understood by the recipient. Before carrying out any work on the equipment the user should be familiar with the contents of this manual, and read relevant chapter carefully. This chapter describes the safety precautions recommended when using the equipment. Before installing and using the equipment, this chapter must be thoroughly read and understood.



Health and Safety The information in this chapter of the equipment documentation is intended to ensure that equipment is properly installed and handled in order to maintain it in a safe condition. When electrical equipment is in operation, dangerous voltages will be present in certain parts of the equipment. Failure to observe warning notices, incorrect use, or improper use may endanger personnel and equipment and cause personal injury or physical damage. Before working in the terminal strip area, the equipment must be isolated. Proper and safe operation of the equipment depends on appropriate shipping and handling, proper storage, installation and commissioning, and on careful operation, maintenance and servicing. For this reason only qualified personnel may work on or operate the equipment. Qualified personnel are individuals who: z



Are familiar with the installation, commissioning, and operation of the equipment and of the system to which it is being connected;



z



Are able to safely perform switching operations in accordance with accepted safety engineering practices and are authorized to energize and de-energize equipment and to isolate, ground, and label it;



z



Are trained in the care and use of safety apparatus in accordance with safety engineering practices;



z



Are trained in emergency procedures (first aid).



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RCS-974AG Transformer Auxiliary Relay



Instructions and Warnings The following indicators and standard definitions are used: DANGER



means that death, severe personal injury, or considerable equipment damage will occur if safety precautions are disregarded.



WARNING



means that death, severe personal, or considerable equipment damage could occur if safety precautions are disregarded.



CAUTION



means that light personal injury or equipment damage may occur if safety precautions are disregarded. This particularly applies to damage to the device and to resulting damage of the protected equipment.



WARNING! The firmware may be upgraded to add new features or enhance/modify existing features, please make sure that the version of this manual is compatible with the product in your hand.



WARNING! During operation of electrical equipment, certain parts of these devices are under high voltage. Severe personal injury or significant equipment damage could result from improper behavior. Only qualified personnel should work on this equipment or in the vicinity of this equipment. These personnel must be familiar with all warnings and service procedures described in this manual, as well as safety regulations. In particular, the general facility and safety regulations for work with high-voltage equipment must be observed. Noncompliance may result in death, injury, or significant equipment damage.



DANGER! Never allow the current transformer (CT) secondary circuit connected to this equipment to be opened while the primary system is live. Opening the CT circuit will produce a dangerously high voltage.



WARNING! z



Exposed terminals



Do not touch the exposed terminals of this equipment while the power is on, as the high voltage generated is dangerous z



Residual voltage



Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It takes a few seconds for the voltage to discharge. ii



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RCS-974AG Transformer Auxiliary Relay



CAUTION! z



Earth



The earthing terminal of the equipment must be securely earthed z



Operating environment



The equipment must only be used within the range of ambient environment detailed in the specification and in an environment free of abnormal vibration. z



Ratings



Before applying AC voltage and current or the DC power supply to the equipment, check that they conform to the equipment ratings. z



Printed circuit board



Do not attach and remove printed circuit boards when DC power to the equipment is on, as this may cause the equipment to malfunction. z



External circuit



When connecting the output contacts of the equipment to an external circuit, carefully check the supply voltage used in order to prevent the connected circuit from overheating. z



Connection cable



Carefully handle the connection cable without applying excessive force.



Copyright Version: R1.01



NR ELECTRIC CO., LTD.



P/N: EN_YJBH1201.0086.0002



69 Suyuan Avenue, Jiangning, Nanjing 211102, China



Copyright © NR 2009. All rights reserved



Tel:



We reserve all rights to this document and to the information



Website: www.nari-relays.com



contained herein. Improper use in particular reproduction and



Email: nr_techsupport @nari-relays.com



86-25-87178185,



Fax: 86-25-87178208



dissemination to third parties is strictly forbidden except where expressly authorized. The information in this manual is carefully checked periodically, and necessary corrections will be included in future editions. If nevertheless any errors are detected, suggestions for correction or improvement are greatly appreciated. We reserve the rights to make technical improvements without notice.



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RCS-974AG Transformer Auxiliary Relay



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RCS-974AG Transformer Auxiliary Relay



Table of Contents Preface .......................................................................................................................................... i  Introduction ............................................................................................................................ i  Health and Safety ................................................................................................................... i  Instructions and Warnings ................................................................................................... ii  Table of Contents ........................................................................................................................ v  Chapter 1 Introduction ................................................................................................................ 1  1.1 Application....................................................................................................................... 1  1.2 Functions ......................................................................................................................... 1  1.3 Features ........................................................................................................................... 2  1.4 Ordering Options ............................................................................................................ 3  Chapter 2 Technical Data ............................................................................................................ 5  2.1 General Specification ..................................................................................................... 5  2.1.1 Electrical Specifications ....................................................................................... 5  2.1.2 Mechanical Specifications ................................................................................... 6  2.1.3 Ambient Temperature and Humidity Range ........................................................ 7  2.1.4 Rear Communication Port .................................................................................... 7  2.1.5 Type Test ................................................................................................................ 8  2.1.6 Electromagnetic Compatibility (EMC) ................................................................. 9  2.1.7 Certifications ....................................................................................................... 10  2.2 Protective Functions ..................................................................................................... 10  2.2.1 Breaker Failure Initiation .................................................................................... 10  2.2.2 Pole Disagreement Protection ........................................................................... 10  2.2.3 Mechanical Protection ........................................................................................ 10  Chapter 3 Operation Theory of Protection ...............................................................................11  3.1 Overview ........................................................................................................................ 11  3.2 General Fault Detector .................................................................................................. 11  3.2.1 Fault Detector of Pole Disagreement Protection .............................................. 11  3.2.2 Fault Detector of Breaker Failure Initiation....................................................... 12  NR ELECTRIC CO., LTD



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RCS-974AG Transformer Auxiliary Relay



3.2.3 Mechanical Protection with Time Delay ............................................................ 12  3.3 Protective Fault Detector .............................................................................................. 13  3.4 Mechanical Protection (MR) ......................................................................................... 13  3.4.1 MR for Warning ................................................................................................... 13  3.4.2 Tripping Directly.................................................................................................. 13  3.4.3 Tripping with Time Delay .................................................................................... 14  3.4.4 Logical Diagram of MR Trip with Time Delay .................................................... 15  3.5 Pole Disagreement Protection (PD) ............................................................................. 16  3.5.1 Operation criteria ................................................................................................ 17  3.5.2 Control Element .................................................................................................. 17  3.5.3 Logical Diagram of Pole Disagreement Protection .......................................... 18  3.6 Breaker Failure Initiation (BFI) ..................................................................................... 20  3.6.1 Operation Criteria ............................................................................................... 20  3.6.2 Control Element .................................................................................................. 21  3.6.3 Logic Diagram of Breaker Failure Initiation ...................................................... 21  3.7 CT Circuit Supervision (CTS) ....................................................................................... 22  Chapter 4 Automatic Supervision ............................................................................................ 23  4.1 Overview ........................................................................................................................ 23  4.2 Relay Self-supervision.................................................................................................. 23  4.2.1 Relay Hardware Monitoring................................................................................ 23  4.2.2 Opto-coupler Power Monitoring ........................................................................ 23  4.2.3 Output Tripping Circuit Monitoring ................................................................... 23  4.2.4 Check Setting ...................................................................................................... 24  4.2.5 Voltage and Current Drift Monitoring and Auto Adjusting ............................... 24  4.2.6 DSP Sampling Monitoring .................................................................................. 24  4.2.7 CPU Sampling Monitoring .................................................................................. 24  4.2.8 Fault Detection Monitoring................................................................................. 24  4.2.9 CT Circuit Supervision (CTS) ............................................................................. 24  4.2.10 Pole Disagreement Position of CB monitoring .............................................. 24  4.2.11 External Tripping Input Monitoring .................................................................. 25  vi



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RCS-974AG Transformer Auxiliary Relay



4.2.12 Breaker Failure Initiation Alarm ....................................................................... 25  4.2.13 Other Abnormality Alarm .................................................................................. 25  4.3 Understand the Alarms ................................................................................................. 25  Chapter 5 Metering and Recording .......................................................................................... 29  5.1 Overview ........................................................................................................................ 29  5.2 Metering ......................................................................................................................... 29  5.2.1 Measurement Value ............................................................................................ 29  5.2.2 Phase Angle ........................................................................................................ 29  5.2.3 Binary Input ......................................................................................................... 30  5.3 Recording Function ...................................................................................................... 31  5.3.1 General Description ............................................................................................ 31  5.3.2 Event Recording ................................................................................................. 31  5.3.3 Fault Recording ................................................................................................... 31  5.4 Time Synchronization ................................................................................................... 32  Chapter 6 Hardware Description .............................................................................................. 35  6.1 Overview ........................................................................................................................ 35  6.2 Plug-in Modules ............................................................................................................ 36  6.2.1 Power Supply Module (No.1 PWR) .................................................................... 36  6.2.2 AC Input Module (No.2 AI) .................................................................................. 37  6.2.3 Low-pass Filter Module (No.3 LPF) ................................................................... 38  6.2.4 Module CPU (No.4 CPU) ..................................................................................... 39  6.2.5 Communication Interface Module (No.5 COM) ................................................. 39  6.2.6 Opto-coupler Module (24Vdc) (No.6 BI) ............................................................ 42  6.2.7 Output Relay Modules (No.7~No.8 BO) ............................................................. 44  6.2.8 Mechanical Relay Modules (No.9~No.B IO) ...................................................... 48  6.2.9 Tripping Output Module (No.E RLY) .................................................................. 54  6.3 Scheme Diagram of Input and Output of MR .............................................................. 59  6.4 Output Signals............................................................................................................... 61  Chapter 7 Settings .................................................................................................................... 63  7.1 Equipment Settings ...................................................................................................... 63  NR ELECTRIC CO., LTD



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RCS-974AG Transformer Auxiliary Relay



7.2 Protection Settings ....................................................................................................... 65  7.3 IP Address Settings ...................................................................................................... 69  7.4 MR Definition Settings .................................................................................................. 69  Chapter 8 HMI Operation Instruction ....................................................................................... 71  8.1 Overview ........................................................................................................................ 71  8.1.1 Keypad Operation ............................................................................................... 72  8.1.2 LED Indicators..................................................................................................... 73  8.1.3 Communication Port ........................................................................................... 74  8.1.4 TARGET RESET Button ...................................................................................... 74  8.2 Understand the HMI Menu Tree .................................................................................... 74  8.2.1 Overview .............................................................................................................. 74  8.2.2 VALUES................................................................................................................ 75  8.2.3 REPORT ............................................................................................................... 76  8.2.4 PRINT ................................................................................................................... 76  8.2.5 SETTINGS ............................................................................................................ 76  8.2.6 CLOCK ................................................................................................................. 77  8.2.7 VERSION .............................................................................................................. 77  8.2.8 LANGUAGE ......................................................................................................... 77  8.3 Understand the LCD Display ........................................................................................ 77  8.3.1 Main Display under Normal Operation Condition ............................................ 77  8.3.2 Display Tripping Report...................................................................................... 78  8.3.3 Display Abnormal Report ................................................................................... 78  8.3.4 Display Status Change of Binary Input ............................................................. 79  8.3.5 View the Settings ................................................................................................ 79  8.3.6 View Records ...................................................................................................... 80  8.3.7 Printing Reports and Waveform ........................................................................ 81  8.4 Input Operation through Keypad ................................................................................. 82  8.4.1 Change the Settings ........................................................................................... 82  8.4.2 Copy Settings ...................................................................................................... 82  8.4.3 Switch Active Setting Group .............................................................................. 83  viii



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RCS-974AG Transformer Auxiliary Relay



8.4.4 Delete Fault Records and Event Records ......................................................... 83  8.4.5 Adjusting the Clock ............................................................................................ 84  8.4.6 View Software Version ........................................................................................ 84  Chapter 9 Communications...................................................................................................... 87  9.1 Overview ........................................................................................................................ 87  9.2 Rear Communication Port Information ....................................................................... 87  9.2.1 RS-485 Interface .................................................................................................. 87  9.2.2 Ethernet Interface ............................................................................................... 89  9.2.3 IEC60870-5-103 Communication ........................................................................ 90  9.3 IEC60870-5-103 Interface over Serial Port .................................................................. 90  9.3.1 Physical Connection and Link Layer ................................................................ 90  9.3.2 Initialization ......................................................................................................... 90  9.3.3 Time Synchronization ......................................................................................... 91  9.3.4 Spontaneous Events ........................................................................................... 91  9.3.5 General Interrogation ......................................................................................... 92  9.3.6 General Functions .............................................................................................. 92  9.3.7 Disturbance Records .......................................................................................... 93  9.4 IEC60870-5-103 Interface over Ethernet ...................................................................... 93  9.5 Modbus Protocol over Serial Port ............................................................................... 94  9.5.1 Overview .............................................................................................................. 94  9.5.2 Fetch real Time Status (Binary) ......................................................................... 94  9.5.3 Fetch Metering Values of Equipment ................................................................ 96  9.5.4 Fetch Settings Value of Equipment ................................................................... 97  9.5.5 Diagnostics (Function Code: 08H) .................................................................... 98  9.5.6 Exception Responses ......................................................................................... 99  9.6 Messages Description for IEC61850 Protocol ............................................................ 99  9.6.1 Overview .............................................................................................................. 99  9.6.2 Communication Profiles ................................................................................... 100  9.6.3 Server Data Organization ................................................................................. 101  9.6.4 Server Features and Configuration ................................................................. 103  NR ELECTRIC CO., LTD



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RCS-974AG Transformer Auxiliary Relay



9.6.5 ACSI conformance ............................................................................................ 105  9.6.6 Logical Nodes ................................................................................................... 109  9.7 Front EIA(RS)232 Interface Communication ..............................................................111  9.8 Communication with Printer ...................................................................................... 112  9.9 Communication with External Time Synchronization Source ................................. 113  Chapter 10 Commissioning and Installation ..........................................................................115  10.1 Introduction ............................................................................................................... 115  10.2 Safety Information..................................................................................................... 116  10.3 Overview .................................................................................................................... 117  10.4 Unpacking and Checking The Protection Equipment ............................................ 117  10.5 Installing the Protection Equipment ........................................................................ 118  10.5.1 Overview .......................................................................................................... 118  10.5.2 Dimensions...................................................................................................... 119  10.5.3 Grounding Guidelines .................................................................................... 119  10.5.4 Cubicle Grounding .......................................................................................... 120  10.5.5 Ground Connection on the Device ................................................................ 121  10.5.6 Grounding Strips and Their Installation ........................................................ 121  10.5.7 Making the Electrical Connections ................................................................ 121  10.6 Check the External Circuitry .................................................................................... 123  10.7 Energizing the Protection Equipment ..................................................................... 124  10.8 Setting the Protection Equipment ........................................................................... 125  10.9 Establishing Connection and Verifying Communication ....................................... 125  10.10 Verifying Settings by Secondary Injection ............................................................ 125  10.10.1 Insulation Test (if required) .......................................................................... 126  10.10.2 Current Measurement Check ....................................................................... 127  10.10.3 Testing the Binary Inputs ............................................................................. 127  10.10.4 Mechanical Protection .................................................................................. 128  10.10.5 Pole Disagreement Protection ..................................................................... 128  10.10.6 Breaker Failure Initiation .............................................................................. 130  10.10.7 Secondary Circuit Abnormality and Failure................................................ 130  x



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RCS-974AG Transformer Auxiliary Relay



10.10.8 Print Fault Report .......................................................................................... 131  10.10.9 Final Check .................................................................................................... 131  Chapter 11 Maintenance ......................................................................................................... 133  11.1 Appearance Check .................................................................................................... 133  11.2 Failure Tracing and Repair ....................................................................................... 133  11.3 Replace Failed Modules ............................................................................................ 134  11.4 Replace Button Battery ............................................................................................. 135  11.5 Cleaning ..................................................................................................................... 135  11.6 Storage ....................................................................................................................... 135  Chapter 12 Decommissioning and Disposal......................................................................... 137  12.1 Decommissioning ..................................................................................................... 137  12.1.1 Switching off ................................................................................................... 137  12.1.2 Disconnecting Cables..................................................................................... 137  12.1.3 Dismantling ..................................................................................................... 137  12.2 Disposal ..................................................................................................................... 137  Chapter 13 Manual Version History ....................................................................................... 139 



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Chapter 1 Introduction



Chapter 1 Introduction 1.1 Application The RCS-974 relay is a transformer auxiliary relay applied for the protection of a transformer, which provides mechanical protection, pole disagreement protection and breaker failure initiation. Mechanical signal could be configured as thermal, gas, oil temperature, winding temperature, pressure, oil level and so on.



Figure 1.1-1



Typical Application



1.2 Functions z



Mechanical protection (26: oil and winding temperature; 63: gas, pressure; 71: oil level; etc)



z



Breaker failure initiation (BFI)



z



Pole disagreement function (62PD)



z



CT circuit failure supervision.(CTS)



z



Power supervision of mechanical protection



z



Current drift auto adjustment



z



Self diagnostic test



z



GPS time synchronization



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Chapter 1 Introduction



z



z



z



Perfect fault recording function —



64 latest tripping records



—



64 latest alarm records



—



64 latest binary change records



—



High resolution oscillography of last 24 oscillograms (compatible with international COMTRADE format)



Rear communication ports: —



Ethernet (Optional)



—



Two RS-485 with IEC 60870-5-103 protocol



—



One RS-485 for clock synchronization



—



One RS-232 or RS-485 for printing



Front communication port: —



One RS-232 for testing and setting



1.3 Features The RCS-974 relay provides wiring connectors from the relay rear panel to the terminal blocks on the rack or cabinet. This kind of connected wiring makes the on-site commissioning and replacement much easier than that done using the traditional screw terminals on the rear panel. NR provides a special and dedicated test set, HELP-90, for a low-level voltage injection test.



●



The RCS-974 relay provides special measurements to prevent undesirable tripping. The relay has two independent data acquisition paths, one for a fault detector and one for protection and its logic. Tripping outputs are supervised by the fault detector to prevent a maloperation caused by any component failure in the relay. ●



On the premise of 24 samples per cycle, all data measurement, calculation and logic discrimination could be done within one sampling period. The event recording and protection logic calculation are completed simultaneously. ●



15 channels of mechanical signal input are provided, among which 7 are for event recording, 5 for instantaneous tripping and 3 for tripping with time delay. ●



●



Power supply of mechanical quantity input circuit is monitored.



●



Mechanical quantity protection and other auxiliary protection are independent of each other.



Various methods of GPS time synchronization, including PPS (pulse per second), PPM (pulse per minute) and IRIG-B standard. ●



●



2



The HMI with a LCD and a 9-button keypad on the front panel is very friendly to the user.



NANJING NARI-RELAYS ELECTRIC CO., LTD



Chapter 1 Introduction ●



The format of event report is compatible with international COMTRADE file.



●



The relay is equipped with Ethernet ports with IEC 61850 or RS-485 ports with the IEC 60870-5-103 protocol.



1.4 Ordering Options z



Two options are available for rated secondary current of CT inputs: 1A or 5A.



z



Four options are available for rated auxiliary voltage: 250V, 220V, 125V, 110V.



z



The communication module No.5 COM is optional: type 5A, type 5B and or type 5E.



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Chapter 1 Introduction



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Chapter 2 Technical Data



Chapter 2 Technical Data 2.1 General Specification 2.1.1 Electrical Specifications 2.1.1.1 Power Supply Rated Voltage (Un)



24Vdc, 110Vdc, 125Vdc, 220Vdc, 250Vdc



Variation



(80% ~ 120%)Un



Ripple in the DC auxiliary voltage



Max 15% of the DC value. Per IEC 60255-11



Voltage dips and voltage short interruptions



Per IEC 61000-4-11, IEC 60255-11:1979 20ms for interruption without de-energizing, dips 60% of Un without reset up to 100ms



Quiescent condition Burden



Operating condition



Backup battery type



[I_ROC_PD_CT1] has to be satisfied in order to meet the zero sequence control element. When [Opt_CT_PD] is set as “1”, only 3I0_CT1>[I_ROC_PD_CT1] and 3I0_CT2>[I_ROC_PD_CT2] has to be satisfied at the same NR ELECTRIC CO., LTD



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Chapter 3 Operation Theory of Protection



time to meet the zero sequence control element.. (2) Control element of phase overcurrent is only for delay 2 of pole disagreement protection by configuring logic setting. The criterion is following: Imax_CT1>[I_OC_BFI_CT1] Where: Imax_CT1: maximum value of three-phase current of CT1. [I_OC_BFI_CT1]: setting of overcurrent element of breaker failure initiation, current from CT1. Settings of phase overcurrent elements used in pole disagreement protection delay 2 and used in breaker failure initiation are the same one [I_OC_BFI_CT1]. (3) The binary input [BI_ExTCtrlPD2] is only used to control delay 2 of pole disagreement protection by configuring logic settings. Logic Diagram of Pole Disagreement Protection



3.5.3 Logical Diagram of Pole Disagreement Protection Logical diagram of pole disagreement protection is presented in Figure 3.5-1.



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Chapter 3 Operation Theory of Protection 3I0_CTn>[I_ROC_PD_CTn]



&



[En_ROC_PD]



≥1



≥1



[En_NegOC_PD] I2_CTn>[I_NegOC_PD_CTn]



&



&



[t_PD1]



[Op_PD1]



[BI_PD_CB]



&



[En_PDP1] [EBI_PDP]



[En_ExTCtrlPD2]



≥1 [BI_ExTCtrlPD2]



≥1 Imax_CT1>[I_OC_BFI1 ]



&



≥1



[En_OC_PDP2 ]



&



[t_PD2]



[Op_PD2]



3I0_CTn>[I_ROC_PD_CTn]



&



≥1



[En_ROC_PDP] [En_NegOC_PDP]



& I2_CTn>[I_NegOC_PD_CTn] [BI_PD_CB]



&



[En_PD2] [EBI_PD]



Figure 3.5-1 Logical diagram of pole disagreement protection Where: 3I0_CTn, I2_CTn, [I_ROC_PD_CTn], and [I_NegOC_PD_CTn]: same meanings as those motioned in section 3.5.2. [En_ROC_PD]: the logic setting of enabling control element of zero sequence overcurrent for pole disagreement protection. [En_NegOC_PD]: the logic setting of enabling control element of negative sequence overcurrent for pole disagreement protection. [En_ExTCtrlPD2]: the logic setting of enabling delay 2 of pole disagreement protection controlled by binary input of three-pole tripping from external relay. NR ELECTRIC CO., LTD



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Chapter 3 Operation Theory of Protection



[En_PD1]: the logic setting of enabling delay 1 of pole disagreement protection. [En_PD2]: the logic setting of enabling delay 2 of pole disagreement protection. [EBI_PD]: binary input of enabling pole disagreement protection. [BI_PD_CB]: the binary input of pole disagreement position of circuit breaker (CB), which can be energized through either terminal 910 or terminal 611. [BI_ExTCtrlPD2]: the binary input of three-pole tripping from external relay. [t_PD1]: the time delay of delay 1 of pole disagreement protection. [t_PD2]: the time delay of delay 2 of pole disagreement protection. [Op_PD1]: the delay 1 of pole disagreement protection operating to issue tripping command. [Op_PD2]: the delay 2 of pole disagreement protection operating to issue tripping command.



3.6 Breaker Failure Initiation (BFI) This function is specifically used to detect breaker failure which is that breaker fails to be tripped to clear fault after it receives tripping command. After breaker failure is detected, contacts of initiating breaker failure initiation are sent out to external relay which is responsible for issuing tripping command.



3.6.1 Operation Criteria Breaker failure initiation (BFI) in RCS-974 is initiated by one of three elements: phase overcurrent element, zero sequence current element or negative sequence current element. Followings are criteria of those elements: Imax_CTn>[I_OC_BFI_CTn] 3I0_CTn>[I_ROC_BFI_CTn] I2_CTn>[I_NegOC_BFI_CTn] Where: Imax_CTn: maximum value of three-phase current from CTn. 3I0_CTn: three times zero sequence current calculated from CTn. I2_CTn: negative sequence current calculated from CTn. [I_ROC_BFI_CTn]: current setting of control element of zero sequence overcurrent for pole disagreement protection, for CTn. [I_NegOC_BFI_CTn]: current setting. of control element of negative sequence overcurrent for pole disagreement protection, for CTn Here n is the group number of CT. When logic setting [Opt_CT_BFI] is set as “0”, only first group of CT (CT1) is used and n=1. When logic setting [Opt_CT_BFI] is set as “1”, both of the two 20



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Chapter 3 Operation Theory of Protection



groups of CT are utilized (CT1 and CT2), n has to be equal to 1 and 2 separately. For example, when [Opt_CT_PD] is set as “0”, only 3I0_CT1>[I_ROC_ BFI1] has to be satisfied in order to meet the zero sequence control element. When [Opt_CT_BFI] is set as “1”, only 3I0_CT1>[I_ROC_ BFI 1] and 3I0_CT2>[I_ROC_ BFI 2] has to be satisfied at the same time to meet the zero sequence control element.



3.6.2 Control Element It is configurable whether the breaker failure initiation is blocked by any one of following contacts: pole disagreement position ([BI_PD_CB]), closed state of breaker auxiliary contact ([BI_52a]) or external tripping signal ( [BI_ExTCtrBFI]).



3.6.3 Logic Diagram of Breaker Failure Initiation RCS-974 provides two delays for breaker failure initiation, which logic diagram is showed in below.



Figure 3.6-1



Logical diagram of breaker failure initiation



Where: Imax_CTn, 3I0_CTn, I2_CTn, [I_ROC_BFI_CTn], [I_NegOC_BFI_CTn], and [I_OC_BFI_CT1]: same meanings as those motioned in section 3.6.2. [En_PD_Ctrl_BFI]: the logic setting of enabling binary input [BI_PD_CB] to control breaker failure initiation. [BI_PD_CB]: the binary input of pole disagreement position of CB. [En_52aCtrlBFI]: the logic setting of enabling binary input [BI_52a] to control breaker failure initiation. [BI_52a]: the binary input of normally open auxiliary contact of circuit breaker. NR ELECTRIC CO., LTD



21



Chapter 3 Operation Theory of Protection



[En_ExTCtrlBFI]: the logic setting of enabling binary input [BI_ExTCtrlBFI] to control breaker failure initiation. [BI_ExTCtrlBFI]: the binary input of external tripping contact from other protection equipment. [En_BFI]: the logic setting of enabling breaker failure protection. [En_ROC_BFI]: the logic setting of enabling zero sequence overcurrent element of breaker failure protection. [En_NegOC_BFI]: the logic setting of enabling negative sequence overcurrent element of breaker failure protection. [Alm_Pkp_BFI1]: the pickup of delay 1 of breaker failure initiation alarm element. [Alm_Pkp_BFI2]: the pickup of delay 2 of breaker failure initiation alarm element.



3.7 CT Circuit Supervision (CTS) If negative sequence current of CT1 (first group CT) or/and CT2 (secondary group CT) is greater than 0.06In (In is the secondary rated current.) and it lasts for 10s, RCS-974 will issue an alarm message as [Alm_CTS_CT1] or/and [Alm_CTS_CT2] of CT circuit failure on LCD. For the meantime, LED “ALARM” is lit on and associated normal open contacts of equipment alarm relay are closed to issue annunciation signal, remote signal and event recording. This alarm information can also be sent to SCADA by communication port. At this time, RCS-974 can also endure on service. The LED “ALARM” will be extinguished automatically 20s later after the three-phase current returns to normal state.



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Chapter 4 Automatic Supervision



Chapter 4 Automatic Supervision 4.1 Overview Though the protection system is in non-operating state under normal conditions, it is waiting for a power system fault to occur at any time and must operate for the fault without failure. When equipment is in energizing process before the LED “HEALTHY” is on, the equipment needs to be checked to ensure no errors. Therefore, the automatic supervision function, which checks the health of the protection system when startup and during normal operation, plays an important role. The numerical relay based on the microprocessor operations is suitable for implementing this automatic supervision function of the protection system. In case a fatal fault is detected during automatic supervision, the equipment will be blocked out. It means that relay is out of service. Before you must re-energize the relay to make relay back into service, please find out the cause and inform the factory. When a failure is detected by the automatic supervision, it is followed with an LCD message, LED indication and alarm contact outputs. At the same time event recording will record the failure alarm which can be viewed in event recording report and be printed.



4.2 Relay Self-supervision 4.2.1 Relay Hardware Monitoring The RAM, ROM chips on CPU module are monitored to ensure whether they are damaged or have errors. If any one of them is detected damaged or having error, equipment will be blocked and issue alarm [Alm_RAM] and [Alm_ROM]. In the mean time, LED “HEALTH” is extinguished and LED “ALARM” is lit on.



4.2.2 Opto-coupler Power Monitoring Positive power supply of opto-coupler is continually monitored. If a disconnection of opto-coupler power supply happens or an error or damage has occurred, an alarm [Alm_Pwr_Opto] will be issued and the relay will be blocked. In the mean time, LED “HEALTH” is extinguished and LED “ALARM” is lit on. Moreover, [BI_Pwr_Opto] in the menu item or BI STATE is set as “0”.



4.2.3 Output Tripping Circuit Monitoring Chips controlling the output relays in the output circuit are continually monitored. If output relays keeps operating over 10s, alarm or any error or damage is detected in these chips, [Alm_TrpOut] will be given and the relay will be blocked. In the mean time, LED “HEALTH” is extinguished and LED “ALARM” is lit on.



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Chapter 4 Automatic Supervision



4.2.4 Check Setting RCS-974 series has 30 setting groups, while only one is active at the same time. The settings of active group are always checked to ensure they are reasonable. If the settings of active group are checked error in DSP chip and CPU chip, an alarm [Alm_Setting] and [Alm_EEPROM] are issued respectively. Meanwhile, LED “HEALTHY” is extinguished and LED “ALARM” is lit on. If these 30 setting groups are not all set, when the equipment is power on first, an alarm [Alm_InvalidGrp] will be issued with equipment being blocked. If the secondary rated current of CT ([I2n]) in equipment settings is changed and the protection settings is not confirmed or some settings in protection settings exceed setting range, an alarm [Alm_InvalidGrp] will be issued with equipment being blocked , LED “HEALTHY” is extinguished and LED “ALARM” is lit.



4.2.5 Voltage and Current Drift Monitoring and Auto Adjusting Zero point of voltage and current may drift influenced by variation of temperature or other environment factors. The equipment continually automatically traces the drift and adjusts it to normal value.



4.2.6 DSP Sampling Monitoring AC current and voltage sampling of DSP chip is monitored and if the samples are detected to be wrong, an alarm [Alm_Smpl_DSP] will be issued and the relay will be blocked. In the mean time, LED “HEALTHY” is extinguished and LED “ALARM” is lit.



4.2.7 CPU Sampling Monitoring The relay compares the CPU sampling and DSP sampling. In normal condition, the sampling should be the same for a certain AC input. If current of voltage sampling in CPU is detected to be different largely with that in DSP, an alarm [Alm_Smpl_CPU] will be issued and the relay will be blocked. In the mean time, LED “HEALTH” is extinguished and LED “ALARM” is lit.



4.2.8 Fault Detection Monitoring When fault detector in CPU module picks up over 10s, an alarm will be issued [Alm_PersistFD] without equipment blocked. In the mean time, LED “ALARM” is lit.



4.2.9 CT Circuit Supervision (CTS) The main purpose of the current transformer (CT) supervision function is to detect faults in the secondary circuits of CT and avoid influence on some protection functions, and remind the user to locate the fault position and solve it. Please refer to the section 3.7 for details.



4.2.10 Pole Disagreement Position of CB monitoring The binary input of pole disagreement position of auxiliary contacts of circuit breaker ([BI_PD_CB]) is continually monitored. When the binary input keeps being energized over 20s, whilst CT circuit failure is not detected by the equipment, RCS-974 will issue an alarm message [Alm_BI_PD] on LCD to indicate an exception external contact connected to [BI_PD_CB]. Meanwhile, LED “ALARM” is lit on and RCS-974 can also endure on service.



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Chapter 4 Automatic Supervision



The LED “ALARM” will be extinguished automatically 20s later after the binary input is de-energized ([BI_PD_CB] =0).



4.2.11 External Tripping Input Monitoring The binary input of external tripping signal for controlling breaker failure initiation ([BI_ExTCtrlBFI]) and the binary input of external tripping signal for controlling pole disagreement delay 2 ([BI_ExtCtrlPD2]) are continually monitored. When any one of them keeps being energized for 20s, RCS-974 will issue an alarm message as [Alm_BI_ExTrp] on LCD to indicate an exception external contact connected to [BI_ExTCtrlBFI] or [BI_ExtCtrlPD2]. Meanwhile, LED “ALARM” is lit on, and the relay can also endure on service. The LED “ALARM” will be extinguished automatically 20s later after binary input ([BI_ExTCtrlBFI], or [BI_ExtCtrlPD2]) is de-energized ([BI_PD_CB] =0).



4.2.12 Breaker Failure Initiation Alarm When breaker failure initiation element picks up, an alarm message [Alm_Pkp_BFI1] or [Alm_Pkp_BFI2] will be issued on LCD to indicate the corresponding contacts of breaker failure initiation of the relay operate and the “ALARM” LED is issued at the same time. When the breaker failure initiation element resets, then the “ALARM” LED is extinguished.



4.2.13 Other Abnormality Alarm When a binary input of MR signal (MR4~MR16) arrives at the equipment, the corresponding alarm signal will be issued with “ALARM” LED being lit, and when the signal is gone, the “ALARM” LED is extinguished.



4.3 Understand the Alarms Hardware circuit and operation condition of the equipment are self-supervised continuously. If any abnormal condition is detected, information or report will be displayed and a corresponding alarm will be issued. A common abnormality may block a certain number of protections functions while the other functions can still work. However, if serious hardware failure or abnormality were detected, all protection functions will be blocked and the LED “HEALTHY” will turn off. When hardware failure is detected, all protection functions will be blocked and “equipment failure” alarm signal will be given by contacts output BO_Fail. The equipment then cannot work normally and maintenance is required to eliminate the failure. NOTE: If the equipment is blocked or an alarm signal is issued during operation, do please find out its reason with the help of submenu “ALM REPORT”. If the reason can not be found on site, please inform the factory NR. Please do not simply press “TARGET RESET” button on faceplate of the equipment, press “RESET” button on the protection panel to energize the binary input [BI_RstTarg] or reboot the equipment.



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Chapter 4 Automatic Supervision



Table 4.3-1 Alarm message list No.



Alarm Message



Meaning Description



1



Alm_RAM



CPU module RAM is damaged.



2



Alm_ROM



CPU module ROM is damaged.



3



Alm_EEPROM



Settings in active group are found error after setting check in CPU chip.



4



Alm_InvalidGrp



Invalid settings in active setting group



5



Alm_Smpl_CPU



CPU chip sample differs too much from DSP sampling



6



Alm_Smpl_DSP



DSP chip is damaged or DSP sampling is wrong



7



Alm_TrpOut



Driving transistors of binary outputs are damaged.



8



Alm_Setting



Settings in active group are found error after setting check in DSP chip.



9



Alm_Pwr_Opto



Loss of opto-coupler power supply.



When above No.1~No.10 alarm messages are displayed on the LCD, the LED “HEALTHY” is extinguished and the LED “ALARM” is it. At the same time the equipment is blocked. 10



Alm_PersistFD



Fault detector keeps picking up for 10s.



11



Alm_CTS_CT1



The secondary circuit of the first group CT is abnormal.



12



Alm_CTS_CT2



The secondary circuit of the second group CT is abnormal.



13



Alm_BI_PD



The binary input of pole disagreement of circuit breaker is abnormal.



14



Alm_BI_ExTrp



The binary inputs of external tripping signal are abnormal.



15



Alm_Pkp_BFI1



Delay 1 of breaker failure initiation picks up.



16



Alm_Pkp_BFI2



Delay 2 of breaker failure imitation picks up.



17



Alm_MR5



MR5 signal arrives at relay.



18



Alm_MR6



MR6 signal arrives at relay.



19



Alm_MR7



MR7 signal arrives at relay.



20



Alm_MR8



MR8 signal arrives at relay.



21



Alm_MR9



MR9 signal arrives at relay.



22



Alm_MR10



MR10 signal arrives at relay.



23



Alm_MR11



MR11 signal arrives at relay.



24



Alm_MR12



MR12 signal arrives at relay.



25



Alm_MR13



MR13 signal arrives at relay.



26



Alm_MR14



MR14 signal arrives at relay.



27



Alm_MR15



MR15 signal arrives at relay.



28



Alm_MR16



MR16 signal arrives at relay.



When the No.10~No.28 above alarm messages are issued on the LCD, the LED “HEALTHY” is still on without equipment being blocked, and the LED “ALARM” is lit.



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Handling suggestion 1. Inform manufacturer for maintenance.(No.1~No.8) 2. Check the power supply of No.6 BI modules. (No.9) 3. Check secondary circuit and protection settings. (No.10) 4. Check the sample value, and the corresponding CT secondary circuit. (No.11~No.12) 5. Check the contact of pole disagreement position of circuit breaker. (No.13) 6. Check the contacts of external tripping from other equipments. (No.14) 7. Treat it as the operation requirement. (No.15~No.28)



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Chapter 4 Automatic Supervision



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Chapter 5 Metering and Recording



Chapter 5 Metering and Recording 5.1 Overview The synchronizer also provides some auxiliary functions, such as real-time data metering, binary input status recording, event and disturbance recording, etc. All these make the synchronizer meet the demands of the modern power grid requirements.



5.2 Metering RCS-974 performs continuous measurement of the analogue input quantities. The measurement data shown below is displayed on the LCD of the synchronizer front panel or on the local or remote PC. Equipment samples 24 points per cycle. Calculate the RMS value in each interval and LCD will be updated every 0.5 second. The following system quantities are displayed in RMS values of the secondary side of CT and VT. This device has double CPU system (i.e. CPU and MON module), so the sampled values of both modules will be displayed on LCD through different access menu.



5.2.1 Measurement Value Table 5.2-1 Measured and calculated values No.



Value



Meaning



Unit



1



Ia_1



Phase A current of the first group of CT (i.e. CT1)



A



2



Ib_1



Phase B current of the CT1



A



3



Ic_1



Phase C current of the CT1



A



4



3I0_1



Three times zero-sequence current of the first group of CT (i.e. CT2)



A



5



I2_1



Negative-sequence current of the CT2



A



6



Ia_2



Phase A current of the CT2



A



7



Ib_2



Phase B current of the CT2



A



8



Ic_2



Phase C current of the CT2



A



9



3I0_2



Three times zero-sequence current of the CT2



A



10



I2_2



Negative-sequence current of the CT2



Path



VALUES -> CPU METERING VALUES -> DSP METERING



5.2.2 Phase Angle Table 5.2-2 Phase angles list No.



Value



Meaning



Unit



1



(Ia-Ib)_1



Phase angle between phase A and phase B currents of the CT1



°



2



(Ib-Ic)_1



Phase angle between phase B and phase C currents of the CT1



°



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Chapter 5 Metering and Recording



No.



Value



Meaning



Unit



3



(Ic-Ia)_1



Phase angle between phase C and phase A currents of the CT1



°



4



(Ia-Ib)_2



Phase angle between phase A and phase B currents of the CT1



°



5



(Ib-Ic)_2



Phase angle between phase B and phase C currents of the CT1



°



6



(Ic-Ia)_2



Phase angle between phase C and phase A currents of the CT1



°



Path



VALUES -> CPU METERING VALUES -> DSP METERING



5.2.3 Binary Input All the binary input changes are recorded in the equipment, and can be displayed on LCD locally printed or sent to automation system of substation via communication channel. If a certain binary input appears to be “1”, it means that an external binary input signal is energized or a corresponding function/element of the equipment is enabled. On the other side if a certain binary input appears to be “0”, it means that the external binary input signal is de-energized or the corresponding function/element of the equipment is disabled. These binary inputs are listed in the following table. Table 5.2-3 Binary input status list No.



Item



Description



1



BI_MR1



Binary input of MR1 mechanical signal.



2



BI_MR2



Binary input of MR2 mechanical signal.



3



BI_MR3



Binary input of MR3 mechanical signal.



4



EBI_PD



Binary input of enabling pole disagreement protection



5



EBI_Dly_MR



Binary input of enabling mechanical protection which operates with time delay (MR1, MR2 and MR3)



6



BI_ExTCtrlBFI



Binary input of an external trip signal to control breaker failure initiation.



7



BI_ExTCtrlPD2



Binary input of an external trip signal to control pole disagreement protection delay 2.



8



BI_52a



Binary input of the normally open auxiliary contact of CB.



9



BI_Pwr_Opto



Binary input of supervising power supply of opto-coupler.



10



BI_PD_CB



Pole disagreement position of CB



11



BI_TrpOut



Binary input of supervision tripping output circuit.



12



FD_CPU



Virtual binary input of supervising pickup of fault detectors.



13



BI_RstTarg



Binary input of signal reset.



14



BI_BlkComm



Binary input indicating communication function.



15



BI_Print



Binary input used to trigger print function.



16



BI_Pulse_GPS



Binary input from time synchronization pulse.



blocking



rear



four



RS485



ports



Path VALUES->BI STATE



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Chapter 5 Metering and Recording



5.3 Recording Function 5.3.1 General Description The RCS-974 series provides the following recording functions: „



Event recording



„



Fault recording



These records are displayed on the LCD of the relay front panel or on the local or remote PC. Navigate the menu to view the report through LCD screen. Access path in menu is:



5.3.2 Event Recording Event recorder includes self-supervision report, status change of binary input report and operating report. The equipment can store 64 records of each kind for self-supervision report and status change of binary input report in non-volatile memory. „



Failure alarms of Automatic Supervision



The equipment is under automatic supervision all the time. If there are any failure or abnormal condition detected, such as, chip damaged, VT circuit failure and so on, it will be logged as an event. For detailed alarm reports, please refer to Table 4.3-1. „



Change of binary input reports



When there is binary input is energized or de-energized, i.e., its state has changed from “0” to “1” or from “1” to “0”, it will be logged as an event Please refer to Table 5.2-3 or binary input reports.



5.3.3 Fault Recording 5.3.3.1 General Description Disturbance recording is consisted of fault operation report recording and fault waveform recording. Disturbance recording is initiated by fault detection element. There are two types of disturbance recording initiation: with and without pickup of protective elements. 5.3.3.2 Fault Recording Capacity and Information The equipment can store 64 records of operation report in non-volatile memory. If a new fault occurs when 64 faults have been stored, the oldest fault report is overwritten by the latest one. This equipment captures current and voltage waveforms and can store up to 24 oscillography waveform data with COMTRADE format. For each trip report, the following items are included: „



Sequence number



Each operation will be recorded with a sequence number in the report and displayed on LCD.



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Chapter 5 Metering and Recording „



Date and time of fault occurrence



The time resolution is 1ms using the relay internal clock synchronized via GPS if connected. Initiating time is the moment when a protective fault detector operates. „



Operating time



An operating time (not including the operating time of output relays) is recorded in the report. „



Protective elements



For the details of designation of each protective element, please refer to Table 8.3-1. 5.3.3.3 Fault Waveform Record Capacity and Information The equipment can save 24 pieces of fault waveform oscillogram. If a new fault occurs when 24 fault waveform records have been stored, the latest waveform record overwrites the oldest one. The equipment stores actual samples that are taken at a rate of 24 samples per cycle. The recording time before fault detection initiation is fixed at 2 cycles (40 ms at 50Hz). The recording time after fault detector initiation is fixed at 6 cycles (120 ms at 50Hz) without protection operation or with protection operation within 6 cycles. If any protection element operates after 6 cycles, then the recording time will be prolonged to another 8 cycles (160ms at 50Hz) in order to show continuous 8 cycle waveform after the protection element operates.



5.4 Time Synchronization As the equipment Real Time Clock has small drift per day, therefore, in order to have a correct time for time tagging of event etc., the operator should set its time periodically or it should be synchronized by a master clock. Time synchronization of RCS-974 can be done by three means: z



IRIG-B signal input from external clock device via a RS-485 port named GPS pulse



z



PPM or PPS input via binary input [BI_Pulse_GPS] terminal 601.



z



Clock message from SACADA by using protocol



The external clock device receives the synchronization signal from GPS antenna and then sends to the equipment using IRIG-B standard, differential signal of PPM or PPS by means of so-called “synchronization bus”. When the differential signal is a PPM input, setting [GPS_Pulse] under submenu “EQUIP SETTINGS” should be set as “1”, while if the differential signal is a PPS input, setting [GPS_Pulse] under “EQUIP SETTINGS” should be set as “0”. A specific GPS PULSE input port RS-485 interface is dedicated for this application. SCADA clock synchronization depends on protocol. The synchronization message is directly acquired by the equipment through the SCADA link. Clock message can provide full information for a certain time as a way of year, date, hour, minute and second while pulse input lacks these information.



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Chapter 5 Metering and Recording



Therefore, in general applications, clock message is usually combined with PPM or PPS input via binary input, or combined with differential signal of PPM or PPS by means of GPS Pulse input port RS-485 with an accuracy of ±1ms. Moreover, the user could also set time and data directly using the local human-machine interface (HMI) of the equipment. RCS-974 internal clock will then be adjusted accordingly. When the equipment is synchronized, all events in “TRIP REPORT”,” ALM REPORT” and “BI CHG REPORT” and current measurement have a time tag with synchronized attribute.



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Chapter 5 Metering and Recording



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Chapter 6 Hardware Description



Chapter 6 Hardware Description 6.1 Overview RCS-974 is made of a 4U height 19” chassis for panel flush mounting. Components mounted on



ESC



GRP



its front include a 128×64 dot matrix LCD, a 9 button keypad, 8 LED indicators, a signal reset button, a 9 pin connector for communication with PC and a 15 pin connector for analog quantity inputs by HELP-90A during commissioning. A monolithic micro controller is installed in the equipment for these functions. Figure 6.1-1 and Figure 6.1-2 show front view and rear view of RCS-974.



Figure 6.1-1 Front view of RCS-974 Please refer to chapter “HMI Operation Instruction” for detailed description of LED indicators and keypad on frontplate.



Figure 6.1-2



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Rear View RCS-974



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Chapter 6 Hardware Description



RCS-974AG and RCS-974AG2 shares the same software, only hardware configurations of them have a slight differences as the table shown in below. Table 6.1-1 Hardware configuration of RCS-974 No



Module



RCS-974AG



RCS-974AG2



Description



1



PWR



●



●



DC power supply



2



AI



●



●



AC current and voltage input



3



LPF



●



●



low-pass filter



4



CPU



●



●



control nucleus of the equipment



5



COM



●



●



communication interface



6



BI



●



●



binary input opto-coupler module (DC 24V)



7



BO



●



●



8



BO



●



●



9



IO



●



●



A



IO



●



●



B



IO



●



●



C



IO



●



●



E



RLY (Type A)



●



－



E



RLY (Type B)



－



●



output relay module Mechanical relay modules (Signal input and signal output modules for mechanical protection)



Tripping output modules for mechanical protection



“●” means protection equipment has this module. “－” means protection equipment has no this module.



6.2 Plug-in Modules 6.2.1 Power Supply Module (No.1 PWR) Power supply (250V/220V/125V/110V) shall be connected to pins 101 (+) and 102 (-). Through interference filter and power switch on the rear, DC/DC converter converts the DC power supply to three voltage class +5V, ±12V and +24V to supply to other modules of the equipment. Pin 104 (+) and pin 105 (-) output ± 24V as power supply of OPT. Pin 106 is surge ground. Figure 6.2-1 shows rear view and connector definition of power supply module.



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Chapter 6 Hardware Description 1 PWR



101



Pwr -



102



103



Opto L +



104



Opto L -



105



GND



From DC power supply



To 24V OPT module



106



Figure 6.2-1 Pin No.



+



101



－



102



＋



104



－



105



Ground



106



＋5V Interference filter



Pwr +



±12V



DC/DC



＋24V To other modules



Rear view and connector definition of No1 PWR module



Sign



Description



101



Pwr+



Positive pole of power supply for the protective device (220V/110V)



102



Pwr-



Negative pole of power supply for the protective device (220V/110V)



103



Blank



104



Opto_L+



Output of positive pole of power supply for opto-coupler (24V)



105



Opto_L-



Output of negative pole of power supply for opto-coupler (24V)



106



GND



Ground



NOTE: When ordering, please mark the input voltage class of power supply.



6.2.2 AC Input Module (No.2 AI) Ia_1, Ib_1, and Ic_1 are phase currents of CT1 and Ia_2, Ib_2, and Ic_2 are phase currents of CT2. It is assumed that polarity mark of CT installed on line is at line side. Pin 215 is ground point. It should be connected to ground bar. Figure 6.2-2 shows rear view and typical connection of AC module.



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Chapter 6 Hardware Description Isolating Transformer Ia_1



AC



Ian_1 Ib_1 Ibn_1



201



202



203



204



Ic_1



205



206



Icn_1



207



208



209



210



Ia_2



211



212



Ian_2



213



214



Ib_2



215



Figure 6.2-2



201 202



203



To LPF



204 205 206



207 208



209



Ibn_2



210



Ic_2



211



Icn_2



212



To LPF



Rear view and connector definition of No.2 AI module



DANGER: Never allow the current transformer (CT) secondary circuit connected to the AC board to be opened while the primary system is live. Opening the CT circuit will produce a dangerously high voltage. Pin No.



Sign



Description



201



Ia_1



Phase A current of first group CT (CT1) (polarity mark)



202



Ian_1



Phase A current of first group CT (CT1)



203



Ib_1



Phase B current of first group CT (CT1) (polarity mark)



204



Ibn_1



Phase B current of first group CT (CT1)



205



Ic_1



Phase C current of first group CT (CT1) (polarity mark)



206



Icn_1



Phase C current of first group CT (CT1)



207



Ia_2



Phase A current of first group CT (CT2) (polarity mark)



208



Ian_2



Phase A current of second group CT (CT2)



209



Ib_2



Phase B current of second group CT (CT2) (polarity mark)



210



Ibn_2



Phase B current of second group CT (CT2)



211



Ic_2



Phase C current of second group CT (CT2) (polarity mark)



212



Icn_2



Phase C current of second group CT (CT2)



213



Not used



214



Not used



215



GND



Ground point connected to ground bar



6.2.3 Low-pass Filter Module (No.3 LPF) This module is used to filter high frequency disturbance from the AC module, regulate the input level and used as an interface between the equipment and dedicated test instrument HELP-90A



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Chapter 6 Hardware Description



developed by NR. From module AC



Adder



Low-pass filter



Measurement in CPU



From HELP-90A



Adder



Low-pass filter



Measurement in DSP



Figure 6.2-3 Block diagram of module No.3LFP module



6.2.4 Module CPU (No.4 CPU) Module CPU, control nucleus of the equipment, comprises monolithic micro controller CPU and digital signal processor DSP. CPU finishes the following functions: „



General fault detection



„



Event recorder, fault oscillograph recorder (could be printed via serial port)



„



Print and communication with HMI



„



Communication with the host of SCADA system of the substation



DSP finishes the following functions: „



Algorithm and logic of protection



Sampling rate of the equipment is 24 points per cycle. Parallel real time data is calculated for algorithm and logic of protection at every sampling point. Hence, very high inherent reliability and security are ensured.



6.2.5 Communication Interface Module (No.5 COM) Module COM performs connection between the equipment and the SCADA system or RTU. Three types are available.



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Chapter 6 Hardware Description



Figure 6.2-4 Rear view and connector definition of type A of No.5 COM module Pin No.



Sign



501 502



Description A



COM1



503



SHLD



504



A



505



COM2



506 507 508 509



512



No.2 communication port: EIA RS-485 standardized communication interface for connecting with a SAS or a RTU.



B SHLD



CLK SYN



510 511



No.1 communication port: EIA RS-485 standardized communication interface for connecting with a SAS or a RTU.



B



A EIA RS-485 standard interface for GPS clock synchronization



B SHLD RTS



PRT



TXD/B SGND/SHLD



Interface RS-232 for connecting with a printer or RS-485 with printer controller.



RX



Optic Fibre To supervisory system



COM



TX



RX RX



TX



Optic Fibre To supervisory system



RX



TX



TX



501



A



502



B



503



SHLD



504



RTS/A



505 506



TXD/B



To GPS for clock synchronization



To printer or controller



SGND/SHLD



Type 5B



Figure 6.2-5 Rear view and connector definition of type B of No.5 COM module



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Chapter 6 Hardware Description



Pin No.



Sign RX



COM1



TX RX



COM2 501 502 503



CLK SYN



504 505



Description



TX



506



No.2 communication port: EIA RS-485 optical fibre communication interface for connecting with a SAS or a RTU.



A B



EIA RS-485 standard interface for GPS clock synchronization



SHLD RTS/A



PRT



No.1 communication port: EIA RS-485 optical fibre communication interface for connecting with a SAS or a RTU.



TXD/B SGND/SHLD



Interface RS-232 for connecting with a printer or RS-485 with printer controller.



Figure 6.2-6 Rear view and connector definition of type E of No.5 COM module Pin No.



Sign COM1



COM2



COM3



COM4 501 502



NET1



No.1 communication port: Ethernet standard communication interface for connecting with a SAS or a RTU at rate of 100Mbit/s or 10Mbit/s.



NET2



No.2 communication port: Ethernet standard communication interface for connecting with a SAS or a RTU at rate of 100Mbit/s or 10Mbit/s.



NET3



No.3 communication port: Ethernet standard communication interface for connecting with a SAS or a RTU at rate of 100Mbit/s or 10Mbit/s .



NET4



No.4 communication port: Ethernet standard communication interface for connecting with a SAS or a RTU at rate of 100Mbit/s or 10Mbit/s.



A COM5



503 504



Description



B SHLD



CLK



NR ELECTRIC CO., LTD



A



No.5 communication port: EIA RS-485 standardized communication interface for connecting with a SAS or a RTU. EIA



RS-485



standard



interface



for



GPS



clock 41



Chapter 6 Hardware Description



Pin No. 505



Sign SYN



Description B



506



SHLD



507



RTS/A



508 509



PRT



synchronization.



TXD/B SGND/SHLD



Interface RS-232 for connecting with a printer or RS-485 with printer controller.



All ports used to communicate with SAS support IEC60870-5-103 protocol. Moreover, Ethernet port in COM modules of type 5E also supports IEC61850. From Figure 6.2-4 to Figure 6.2-6 shows rear view of these types and their connector definition. All type are equipped with a RS-485 port for receiving second pulse signal (PPS-pulse per second) from GPS and a port for printer. Printer port could be configured as RS-232 or RS-485 by setting corresponding jumpers on the PCB (RS-232 default). If logic setting [En_Net_Print] is set to “1”, printer port must be set as RS-485. Transmission rate of printer port can be set by the setting [Printer_Baud] and should be the same with baud rate of the printer. NOTE: For the port used to printer or controller, it can be configured as RS-485 or RS-232 by setting corresponding jumper of module COM. The port is configured as RS-232 by shorting PIN 1 and PIN 2 and as RS-485 by shorting PIN 2 and PIN 3. As shown in the following figure.



Figure 6.2-7 Print port configuration There are three options to finish time synchronization: 1 Receiving PPS (pulse per second) and PPM (pulse per minute) via external contact 2 Receiving PPS, PPM and IRIG-B signal via RS-485 3 Receiving time synchronization message from substation automation system



6.2.6 Opto-coupler Module (24Vdc) (No.6 BI) Following figure shows rear view and connector definition of this No.6 module which voltage level is DC 24V.



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Chapter 6 Hardware Description



Figure 6.2-8



Rear view and connector definition of No.6 BI module



Pin No.



Sign



601



BI_Pulse_GPS



Binary input of time synchronizing pulse



602



BI_Print



Binary input of initiating printing



603



BI_BlkComm



Binary input of blocking communication between the protective device and SAS



604



EBI_PD



Binary input of enabling pole disagreement protection



605



EBI_Dly_MR



Binary input of enabling mechanical protection which operates with time delay (MR1, MR2 and MR3)



606



BI_ExTCtrlBFI



Binary input of an external trip signal to control breaker failure initiation.



607



BI_ExTCtrlPD2



Binary input of an external trip signal to control pole disagreement protection delay 2.



608



BI_52a



Binary input of the normally open auxiliary contact of CB.



609



BI_Resv4



Reserved for future application



610



BI_Resv5



Reserved for future application



611



BI_RstTarg



Binary input of signal reset



612



BI_PD_CB



Pole disagreement position of CB



613



Description



Not used



614



Opto_L+



Input of positive pole of power supply for opto-coupler (24V)



615



Opto_L-



Input of negative pole of power supply for opto-coupler (24V)



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43



Chapter 6 Hardware Description



Pin No.



Sign



Description



617



BI_Resv7



Reserved for future application



618



BI_Resv8



Reserved for future application



619



BI_Resv9



Reserved for future application



620



BI_Resv10



Reserved for future application



621



BI_Resv11



Reserved for future application



622



BI_Resv12



Reserved for future application



623



BI_Resv13



Reserved for future application



624



BI_Resv14



Reserved for future application



Other pins



Not used



NOTE: „



[BI_Pulse_GPS] is used with the setting [GPS_Pulse] for receiving clock synchronization signal from GSP or other equipment used clock synchronization.



„



[BI_BlkComm] is energized, when the equipment is in maintenance or commissioning status. All of the reports will not be sent via communication port then, but local displaying and printing are still working. This link should be open during normal operation condition.



„



Besides above binary inputs, there are some virtual binary inputs in RCS-974. So-called virtual binary input is the one that is not actually input from equipment external terminal but logically justified by the CPU and can be displayed under menu item “BI STATE”. ♦



[BI_Pwr_Opto]: If the 24V power supply (from terminal 104 on DC board) is connected to terminal 614 and 24V GND (from terminal 105 on DC board) is connected to terminal 615, [BI_Pwr_Opto] is set as “1”. Otherwise, [BI_ Pwr_Opto] is set to 0 and alarm annunciation is issued.



♦



[BI_TrpOut]: If trip output relay is driven to output contact, it is set as “1”. When [BI_TrpOut] is set as “1” over 10s,[Alm_TrpOut] is issued on LCD.



♦



[FD_CPU]: whenever fault detector in CPU module picks up, If [FD_CPU] is been set over 10s, an alarm annunciation message as [Alm_PersistFD] is popped out on the LCD screen. Meanwhile, LED “ALARM” is lit on and normal open contacts of equipment alarm relay are closed to issue remote signal, annunciation signal and signals to event recording device. Even then, RCS-974 can also endure on service.



6.2.7 Output Relay Modules (No.7~No.8 BO) Theses two modules are used to output various signals and issue trip commands. 6.2.7.1 No.7 BO Module Normally open contacts for pole disagreement protection delay 1 and delay 2 respectively are 44



NR ELECTRIC CO., LTD



Chapter 6 Hardware Description



closed to issue trip command to trip circuit when the related element operates. Normally open contacts for breaker failure initiation delay 1 and delay 2 respectively are closed to send signal to BFP (breaker failure protection) in other protection equipment as a criterion when the related element operates.



707 702 704 706 708 710 712 714 716 718 720 722 724 726 728 730



701



709



703



715



705



712



707



714



709



716



711



708



713



710



715



727



717



728



719



711



721



713



723



729



725



730



727



717



729



718 719 720 721 722 723 724 725 726



Figure 6.2-9 Pin No.



FDR Signal



705



Annunciation Signal



703



Binary Output of Breaker Failure Initiation delay 1



706



OUT 1



Binary Output of Breaker Failure Initiation delay 2



704



Binary Output of Pole Disagreement Protection delay 2



702



Binary Output of Pole Disagreement Protection delay 1



701



Remote Signal



Figure 6.2-9 shows the rear view and connector definition of No.7 module. Common BO_Fail BO_Alm_Abnor BO_PD Common BO_Fail BO_Alm_Abnor BO_PD Common Port of Local Signal BO_Fail BO_Alm_Abnor BO_PD BO_BFI1_1



BO_BFI1_2



BO_BFI2_1



BO_BFI2_1



BO_PD2Trp_1



BO_PD2Trp_2



BO_PD2Trp_3 BO_PD1Trp_1



BO_PD1Trp_2



Rear view and connector definition of No.7 BO Module



Sign



Description



Remote signals 701,702



BO_Fail



NC contact, is closed when power supply of the equipment is lost or hardware failures are detected, which means equipment is blocked and out of service.



701, 704



BO_Alm_Abnor



NO contact, is closed protective when device is in abnormal condition but still in service, such as CT circuit failure, etc.



701, 706



BO_PD



NO contact, is closed when pole disagreement protection operates.



Annunciation signals 703,705



BO_Fail



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NC contact, is closed when power supply of the equipment is lost or hardware failures are detected, which means equipment is blocked and out of service.



45



Chapter 6 Hardware Description



Pin No.



Sign



Description



703,707



BO_Alm_Abnor



NO contact, is closed protective when device is in abnormal condition but still in service, such as CT circuit failure, etc.



703,709



BO_PD



NO magnetic latched contact, is closed when pole disagreement protection operates.



FDR signals (Fault and disturbance recording signals) 715,712



BO_Fail



NC contact, is closed when power supply of the equipment is lost or hardware failures are detected, which means equipment is blocked and out of service.



715,714



BO_Alm_Abnor



NO contact, is closed protective when device is in abnormal condition but still in service, such as CT circuit failure, etc.



715,716



BO_PD



NO contact, is closed when pole disagreement protection operates.



Binary outputs of breaker failure initiation 708,710



BO_BFI1_1



727,728



BO_BFI1_2



711,713



BO_BFI2_1



729,730



BO_BFI2_2



NO contact, it will be closed when breaker failure initiation delay 1 operates. NO contact, it will be closed when breaker failure initiation delay 2 operates.



Tripping outputs of pole disagreement protection 717,718



BO_PD2Trp_1



719,720



BO_PD2Trp_2



721,722



BO_PD2Trp_3



723,724



BO_PD1Trp_1



725,726



BO_PD1Trp_2



NO contact, it will be closed when pole disagreement protection delay 2 operates. NO contact, it will be closed when pole disagreement protection delay 1 operates.



NOTE: NO contact: normally open contact; NC contact: Normally closed contact. Same meanings to other NO and NC contacts appeared in following description. 6.2.7.2 No.8 BO Module This module is used to output various signals and issue trip commands with time delay for MR1, MR2 and MR3 mechanical protections which operate with their time delays respectively. Figure 6.2-10 shows the rear view and connector definition of No.8 BO module.



46



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Initiation Annunciation Signal Tripping signal



FDR Signal



Remote Signal



Chapter 6 Hardware Description



Figure 6.2-10 Pin No.



Rear view and connector definition of No.8 BO module



Sign



Description



Remote signals 802,808



BO_Dly_MR1



NO contact, is closed when mechanical protection of MR1 operates with a time delay.



802,810



BO_Dly_MR2



NO contact, is closed when mechanical protection of MR2 operates with a time delay.



802,806



BO_Dly_MR3



NO contact, is closed when mechanical protection of MR3 operates with a time delay.



FDR signals (Fault and disturbance recording signals 813,815



BO_Dly_MR1



NO contact, is closed when mechanical protection of MR1 operates with a time delay.



818,812



BO_Dly_MR2



NO contact, is closed when mechanical protection of MR2 operates with a time delay.



818,814



BO_Dly_MR3



NO contact, is closed when mechanical protection of MR3 operates with a time delay.



Annunciation signals (magnetic latched contact) 827,817



BO_Dly_MR1



NO contact, is closed when mechanical protection of MR1 operates with a time delay.



827,819



BO_Dly_MR2



NO contact, is closed when mechanical protection of MR2 operates



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47



Chapter 6 Hardware Description



Pin No.



Sign



Description with a time delay.



827,821



BO_Dly_MR3



NO contact, is closed when mechanical protection of MR3 operates with a time delay.



827,825



BO_Dly_MR



NO contact, is closed when mechanical protection of MR1, MR2 or MR3 operates with a time delay.



Binary outputs used to initiate trip output relay 828, 820



BO_Dly_MR1



NO contact, is closed when mechanical protection of MR1 operates with a time delay.



828,822



BO_Dly_MR2



NO contact, is closed when mechanical protection of MR2 operates with a time delay.



828,824



BO_Dly_MR3



NO contact, is closed when mechanical protection of MR3 operates with a time delay.



Binary output for reset command used inside of equipment 829



TargetReset+



830



TargetReset-



NO contact, it will be closed when the button [TargetReset] on the front panel is pushed down or binary input [BI_RstTarg] is energized. Pin 829 is connected to positive pole of DC power supply Pin 830 is connected to pins 901, A01, B01 and C01 of following output relay modules



6.2.8 Mechanical Relay Modules (No.9~No.B IO) 6.2.8.1 No.9 IO Module This module is used to output various signals, issue trip commands and accept reset command. Figure 6.2-11 shows the rear view and connector definition of No.9 IO module.



48



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Chapter 6 Hardware Description From power supply + From power supply -



IO



TargetReset-



830 901



Reset Signal



925



908 910 912 914 916 918 920 922 924 926 928 930



903



905



905



907



907



909



909



911



910



913



902



915



904



917



906



919



920



921



912



923



914



925



916



927



930



929



922 924 926 919 911 913 915



Figure 6.2-11 Pin No.



Binary Input Signals for Mechanical protection



High Voltage



906



903



Pwr +



Module Power Input



Input of PDP Signal



Pwr BI_MR1 BI_MR2 BI_MR3 BI_PD_CB Common



Annunciation Signal



904



929



BO_MR1 BO_MR2 BOMR3 Common



MR_Trip Comd. FDR Recording Remote Signal



902



901



ResetInput



BO_MR1 BO_MR2 BO_MR3 Common BO_MR1 BO_MR2 BO_MR3 Common BO_MR1 BO_MR2 BO_MR3



Rear view and connector definition of No.9 IO module



Sign



Description



901



Reset Input



When a reset signal arrives, LEDs labeled as “MECH1”, “MECH2” and “MECH3” are reset to be extinguished.



925



Pwr+



Positive pole of power of the board connected to DC power supply



926



Pwr-



Negative pole of power of the board connected to DC power supply



903



BI_MR1



Binary input of mechanical protection of MR1



905



BI_MR2



Binary input of mechanical protection of MR1



907



BI_MR3



Binary input of mechanical protection of MR3



909



BI_PD_CB



Binary input of pole disagreement protection of circuit breaker, is also called binary input of mechanical protection of MR4



Annunciation signals (magnetic latched contact) 910,902



BO_MR1



NO contact, is closed when binary input [BI_MR1] is energized.



910,904



BO_MR2



NO contact, is closed when binary input [BI_MR2] is energized.



910,906



BO_MR3



NO contact, is closed when binary input [BI_MR3] is energized.



Remote Signals 920,912



BO_MR1



NO contact, is closed when binary input [BI_MR1] is energized.



920,914



BO_MR2



NO contact, is closed when binary input [BI_MR2] is energized.



920,916



BO_MR3



NO contact, is closed when binary input [BI_MR3] is energized.



FDR signals (Fault and disturbance recording signals) 930,922



BO_MR1



NR ELECTRIC CO., LTD



NO contact, is closed when binary input [BI_MR1] is energized. 49



Chapter 6 Hardware Description



Pin No.



Sign



Description



930,924



BO_MR2



NO contact, is closed when binary input [BI_MR2] is energized.



930,926



BO_MR3



NO contact, is closed when binary input [BI_MR3] is energized.



Binary outputs used to initiate tripping relay 919,911



BO_MR1



NO contact, is closed when binary input [BI_MR1] is energized. Not used normally.



919,913



BO_MR2



NO contact, is closed when binary input [BI_MR2] is energized. Not used normally.



919,915



BO_MR3



NO contact, is closed when binary input [BI_MR3] is energized. Not used normally.



6.2.8.2 No.A IO Module This module is used to output various signals, issue trip commands and accept reset command. Figure 6.2-12 shows the rear view and connector definition of No.A IO module From power supply + From power supply 830 A01



IO



A25 A29 A03 A05



A02 A04 A06 A08 A10 A12 A14 A16 A18 A20 A22 A24 A26 A38 A30



A01 50



Module Power Input



Binary Input Signals of Mechanical protection



ResetInput Pwr+ Pwr BI_MR5 BI_MR6



A01



A07



A03



A09



A05



A10



Common



A07



A02



BO_MR5



A09



A04



BO_MR6



A11



A06



BO_MR7



A13



A08



BO_MR8



A15



A20



Common



A17



A12



BO_MR5



A19



A14



BO_MR6



A21



A16



BO_MR7



A23



A18



Trip_MR8



A25



A30



Common



A27



A22



BO_MR5



A29



A24



BO_MR6



A26



BO_MR7



Figure 6.2-12 Pin No.



TargetResetReset Signal



Sign ResetInput



BI_MR7 BI_MR8



A28



BO_MR8



A19



Common



A11



BO_MR5



A13



BO_MR6



A15



BO_MR7



A17



BO_MR8



Rear view and connector definition of No.A IO module Description



When a reset signal arrives, LED labeled as “MECH5”, “MECH6”, “MECH7” and “MECH8” are reset to be extinguished. NR ELECTRIC CO., LTD



Chapter 6 Hardware Description



Pin No.



Sign



Description



A25



Pwr+



Positive pole of power of the board connected to DC power supply



A26



Pwr-



Negative pole of power of the board connected to DC power supply



A03



BI_MR5



Binary input of mechanical protection of MR5



A05



BI_MR6



Binary input of mechanical protection of MR6



A07



BI_MR7



Binary input of mechanical protection of MR7



A09



BI_MR8



Binary input of mechanical protection of MR8



Annunciation signals (magnetic latched contact) A10,A02



BO_MR5



NO contact, is closed when binary input [BI_MR5] is energized.



A10,A04



BO_MR6



NO contact, is closed when binary input [BI_MR6] is energized.



A10,A06



BO_MR7



NO contact, is closed when binary input [BI_MR7] is energized.



A10,A08



BO_MR8



NO contact, is closed when binary input [BI_MR8] is energized.



Remote Signals A20,A12



BO_MR5



NO contact, is closed when binary input [BI_MR5] is energized.



A20,A14



BO_MR6



NO contact, is closed when binary input [BI_MR6] is energized.



A20,A16



BO_MR7



NO contact, is closed when binary input [BI_MR7] is energized.



A20,A18



BO_MR8



NO contact, is closed when binary input [BI_MR8] is energized.



FDR signals (Fault and disturbance recording signals) A30,A22



BO_MR5



NO contact, is closed when binary input [BI_MR5] is energized.



A30,A24



BO_MR6



NO contact, is closed when binary input [BI_MR6] is energized.



A30,A26



BO_MR7



NO contact, is closed when binary input [BI_MR7] is energized.



A30,A28



BO_MR8



NO contact, is closed when binary input [BI_MR8] is energized.



Binary outputs used to initiate tripping relay A19,A11



BO_MR5



NO contact, is closed when binary input [BI_MR5] is energized.



A19,A13



BO_MR6



NO contact, is closed when binary input [BI_MR6] is energized.



A19,A15



BO_MR7



NO contact, is closed when binary input [BI_MR7] is energized.



A19,A17



BO_MR8



NO contact, is closed when binary input [BI_MR8] is energized.



6.2.8.3 No.B IO Module This module is used to output various signals, issue trip commands and accept reset command. Figure 6.2-13 shows the rear view and connector definition of No.B IO module



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51



Chapter 6 Hardware Description From power supply + From power supply TargetReset-



830 B01



IO



B25 B29 B03



B02 B04 B06 B08 B10 B12 B14 B16 B18 B20 B22 B24 B26 B28 B30



B01 B03 B05



B07 B09



Module Power Input



Binary Input Signals of Mechanical protection



ResetInput Pwr + Pwr BI_MR9 BI_MR10 BI_MR11 BI_MR12



B07



B10



B09



B02



BO_MR9



B11



B04



BO_MR10



B13



B06



BO_MR11



B15



B08



BO_MR12



B17



B20



Commonl



B19



B12



BO_MR9



B21



B14



BO_MR10



B23



B16



BO_MR11



B25



B18



BO_MR12



B27



B30



Common



B29



B22



BO_MR9



B24



BO_MR10



Figure 6.2-13 Pin No.



B05



Reset Signal



Common



B26



BO_MR11



B28



BO_MR12



B19



Common



B11



BO_MR9



B13



BO_MR10



B15



BO_MR11



B17



BO_MR12



Rear view and connector definition of No.B IO module



Sign



Description



B01



ResetInput



When a reset signal arrives, LED labeled as “MECH9”, “MECH10” “MECH11” and “MECH12” are reset to be extinguished.



B25



Pwr+



Positive pole of power of the board connected to DC power supply



B26



Pwr-



Negative pole of power of the board connected to DC power supply



B03



BI_MR9



Binary input of mechanical protection of MR9



B05



BI_MR10



Binary input of mechanical protection of MR10



B07



BI_MR11



Binary input of mechanical protection of MR11



B09



BI_MR12



Binary input of mechanical protection of MR12



Annunciation signals (magnetic latched contact) B10,B02



BO_MR9



NO contact, is closed when binary input [BI_MR9] is energized.



B10,B04



BO_MR10



NO contact, is closed when binary input [BI_MR10] is energized.



B10,B06



BO_MR11



NO contact, is closed when binary input [BI_MR11] is energized.



B10,B08



BO _MR12



NO contact, is closed when binary input [BI_MR12] is energized.



Remote Signals B20,B12



BO_MR9



NO contact, is closed when binary input [BI_MR9] is energized.



B20,B14



BO_MR10



NO contact, is closed when binary input [BI_MR10] is energized.



B20,B16



BO_MR11



NO contact, is closed when binary input [BI_MR11] is energized.



B20,BA18



BO _MR12



NO contact, is closed when binary input [BI_MR12] is energized.



52



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Chapter 6 Hardware Description



Pin No.



Sign



Description



FDR signals (Fault and disturbance recording signals) B30,B22



BO_MR9



NO contact, is closed when binary input [BI_MR9] is energized.



B30,B24



BO_MR10



NO contact, is closed when binary input [BI_MR10] is energized.



B30,B26



BO_MR11



NO contact, is closed when binary input [BI_MR11] is energized.



B30,B28



BO _MR12



NO contact, is closed when binary input [BI_MR12] is energized.



Binary outputs used to initiate tripping relay B19,B11



BO_MR9



NO contact, is closed when binary input [BI_MR9] is energized.



B19,B13



BO_MR10



NO contact, is closed when binary input [BI_MR10] is energized. Not used normally.



B19,B15



BO_MR11



NO contact, is closed when binary input [BI_MR11] is energized. Not used normally.



B19,B17



BO_MR12



NO contact, is closed when binary input [BI_MR12] is energized. Not used normally.



6.2.8.4 No.C IO Module This module is used to output various signals, issue trip commands and accept reset command. Figure 6.2-14 shows the rear view and connector definition of No.C IO module



From power supply + From power supply -



IO 830



TargetReset-



C01



C10 C12 C14 C16 C18 C20 C22 C24 C26 C28 C30



C07 C09 C11 C13 C15 C17 C19 C21 C23 C25 C27 C29



C05 C07 C09 C10 C02 C04 C06 C08 C20 C12 C14 C16 C18 C30 C22 C24 C26 C28



Figure 6.2-14



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Binary Input Signals of Mechanical protection



High Voltage



C08



C05



C03



ResetInput



Module Power Input



Annunciation Signal



C06



C03



C29



Remote Signal



C04



C01



FDR Recording



C02



C25



Reset Signal



Pwr + Pwr BI_MR13 BI_MR14 BI_MR15 BI_MR16



Common BO_MR13 BO_MR14 BO_MR15 BO_MR16 Common BO_MR13 BO_MR14 BO_MR15 BO_MR16 Common BO_MR13 BO_MR14 BO_MR15 BO_MR16



Rear view and connector definition of No.C IO module



53



Chapter 6 Hardware Description



Pin No.



Sign



Description



C01



ResetInput



When a reset signal arrives, LED labeled as [MECH13], [MECH14], [MECH15] and [MECH16] are reset to be extinguished.



C25



Pwr+



Positive pole of power of the board connected to DC power supply



C26



Pwr-



Negative pole of power of the board connected to DC power supply



C03



BI_MR13



Binary input of mechanical protection of MR13



C05



BI_MR14



Binary input of mechanical protection of MR14



C07



BI_MR15



Binary input of mechanical protection of MR15



C09



BI_MR16



Binary input of mechanical protection of MR16



Annunciation signals (magnetic latched contact) C10,B02



BO_MR13



NO contact, is closed when binary input [BI_MR13] is energized.



C10,B04



BO_MR14



NO contact, is closed when binary input [BI_MR14] is energized.



C10,B06



BO_MR15



NO contact, is closed when binary input [BI_MR15] is energized.



C10,B08



BO _MR16



NO contact, is closed when binary input [BI_MR16] is energized.



Remote Signals C20,B12



BO_MR13



NO contact, is closed when binary input [BI_MR13] is energized.



C20,B14



BO_MR14



NO contact, is closed when binary input [BI_MR14] is energized.



C20,B16



BO_MR15



NO contact, is closed when binary input [BI_MR15] is energized.



C20,BA18



BO _MR16



NO contact, is closed when binary input [BI_MR16] is energized.



FDR signals (Fault and disturbance recording signals) C30,B22



BO_MR13



NO contact, is closed when binary input [BI_MR13] is energized.



C30,B24



BO_MR14



NO contact, is closed when binary input [BI_MR14] is energized.



C30,B26



BO_MR15



NO contact, is closed when binary input [BI_MR15] is energized.



C30,B28



BO _MR16



NO contact, is closed when binary input [BI_MR16] is energized.



Binary outputs used to initiate trip output relay C19,B11



BO_MR13



NO contact, is closed when binary input [BI_MR13] is energized.



C19,B13



BO_MR14



NO contact, is closed when binary input [BI_MR14] is energized.



C19,B15



BO_MR15



NO contact, is closed when binary input [BI_MR15] is energized.



C19,B17



BO _MR16



NO contact, is closed when binary input [BI_MR16] is energized.



Binary outputs used to initiate trip output relay C19,C11



BO_MR13



NO contact, is closed when binary input [BI_MR13] is energized. Not used normally.



C19,C13



BO_MR14



NO contact, is closed when binary input [BI_MR14] is energized. Not used normally.



C19,C15



BO_MR15



NO contact, is closed when binary input [BI_MR15] is energized. Not used normally.



C19,C17



BO_MR16



NO contact, is closed when binary input [BI_MR16] is energized. Not used normally.



6.2.9 Tripping Output Module (No.E RLY) This module is used to output trip commands to trip circuit breakers. There are two types module to be optional for No.E RLY. 54



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Chapter 6 Hardware Description



NOTE: Type A and type B of No.E RLY module are equipped for RCS-974AG and RCS-974AG2 respectively. 6.2.9.1 Type A of No.E RLY All the trip signals issued by No.8 BO module, No.9~No.C IO modules should be led to pin E01 and/ E02 via several isolator links which are mounted on the panel and can be used to enable or disable corresponding tripping output contacts. Figure 6.2-15 shows the rear view and connection definition of this module. From power supply + From power supply E29 E30 E01 E02



RLY



E03 E04 E05



E02 E04 E06 E08 E10 E12 E14 E16 E18 E20 E22 E24 E26 E28 E30



E06



E01



E07



E03



E08



E05



E09



E07



E10



E09



E11



E11



E12



E13



E14



E17



E15



E19



E16



E21



E17



E23



E18



E25



E19



E27



E20



E29



Pwr TrpInput1 TrpInput2 BO_Trp_1



BO_Trp_2



BO_Trp_3



BO_Trp_4



BO_Trp_5



BO_Trp_6 BO_Trp_7



BO_Trp_8



BO_Trp_9



E21



E23 E24 E25 E26



Pin No.



MR Trip Signal Input (high voltage +)



Pwr +



E13



E15



E22



Figure 6.2-15



Module Power Input



BO_Trp_10 BO_Trp_11



BO_Trp_12



E27



Common



E28



BO_LossPwr_MR



Rear view and connector definition of type A of No.E RLY module



Sign



Description



E29



Pwr+



Positive pole of power of the board connected to DC power supply



E30



Pwr-



Negative pole of power of the board connected to DC power supply



MR Trip Signal Input E01



TrpInput1



Trip signal input to initiate the 1st group of MR trip output contacts



E02



TrpInput2



Trip signal input to initiate the 2nd group of MR trip output contacts



1st Group of MR Trip Output Contacts NR ELECTRIC CO., LTD



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Chapter 6 Hardware Description



Pin No.



Sign



E03,E04



BO_Trp_1



E05,E06



BO_Trp_2



E07,E08



BO_Trp_3



E09,E10



BO_Trp_4



E11,E12



BO_Trp_5



E13,E14



BO_Trp_6



Description



NO contacts, are closed when pin E01 is energized by DC high voltage.



2nd Group of MR Trip Output Contacts E15,E16



BO_Trp_7



E17,E18



BO_Trp_8



E19,E20



BO_Trp_9



E21,E22



BO_Trp_10



E23,E24



BO_Trp_11



E25,E26



BO_Trp_12



NO contacts, are closed when pin E01 is energized by DC high voltage.



Annunciation signals (magnetic latched contact) E27,E28



BO_LossPwr_MR



NC contact, is closed when power of this boardis lost.



6.2.9.2 Type B of No.E RLY This is used to output trip commands to trip circuit breakers. All the trip commands issued No.8 BO module and No.9~No.C IO mdoules should be led to pin E01, E02, E03, E04, E05 and E06 via several isolator links which are mounted on the panel and can be used to enable or disable corresponding tripping output contacts. This module is designed as hardware trip matrix module. See Figure 6.3-3 for schematic diagram of trip matrix and Figure 6.2-17 for rear view and connector definition information.



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Chapter 6 Hardware Description



E01



E02



E03



E04



E05



E06



E29



E27



E30



+Heavy voltage



output1



output2



output3



output4



output5



Figure 6.2-16



E28



-Heavy voltage



E07



E08



E09



E10



E11



E12



E13



E14



E15



E16



E17



E18



E19



E20



E21



E22



E23



E24



E25



E26



Schematic diagram of trip matrix



As shown in above figure, the trip matrix is accomplished by diodes. The factory default setting is that any input of the trip matrix will activate all 5 output relays. Whenever any on site modification is required, it is easy to configure the trip matrix by remove or keep the relevant diode. The point to note here is that every output relay has two normal open contacts. Additionally, commissioning test is absolutely necessary when any modification is done on the trip matrix. Refer to chapter 8 for more description about commissioning. Moreover, as presented in above figure, resistor and capacitors series circuit paralling on the two ends of OUTPUT RELAY1 and OUTPUT RELAY 2 are used to spread the tripping command level. Theoretically speaking, after the vanishment of trip matrix inputs, tripping command issued by OUTPUT RELAY 1 and OUTPUT RELAY 2 are extended more than 11ms for rated voltage 110V /125V and 22ms for the rated voltage 220V/250V.



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Chapter 6 Hardware Description From power supply + From power supply E29 E30



Module Power Input



MR Trip Signal Input (high voltage +)



E01 E02



RLY



E03 E04 E05



E10 E12 E14 E16 E18 E20 E22 E24 E26 E28 E30



E08



E07



E09



E09



E10



E11



E11



E13



E12



E15



E13



E17



E14



E19



E15



E21



E16



E23



E17



E25



E18



E27



E19



E29



E20 E21 E22



E25



Group 5



E23 E24



E28



Figure 6.2-17 Pin No.



Annunication Signal



E26 E27



Pwr TrpInput1 TrpInput2 TrpInput3 TrpInput4 TrpInput5 TrpInput6 BO_Trp_1-1



Group 1



E08



E05



Group 2



E06



E03



E07



Group 3



E04



E06



Group 4



E02



E01



Pwr +



BO_Trp_1-2



BO_Trp_2-1



BO_Trp_2-1



BO_Trp_3-1



BO_Trp_3-2 BO_Trp_4-1



BO_Trp_4-2



BO_Trp_5-1



BO_Trp_5-2 Common BO_LossPwr_MR



Rear view and connector definition of type B of No.E RLY module



Sign



Description



E29



Pwr+



Positive pole of power of the board connected to DC power supply



E30



Pwr-



Negative pole of power of the board connected to DC power supply



MR Trip Signal Input E01



TrpInput 1



Trip signal Input to initiate MR trip output relays.



E02



TrpInput 2



Trip signal Input to initiate MR trip output relays.



E03



TrpInput 3



Trip signal Input to initiate MR trip output relays.



E04



TrpInput 4



Trip signal Input to initiate MR trip output relays.



E05



TrpInput 5



Trip signal Input to initiate MR trip output relays.



E06



TrpInput 6



Trip signal Input to initiate MR trip output relays.



MR Trip Output Contacts E07,E08



BO_Trp_1-1



E09,E10



BO_Trp_1-2



E11,E12



BO_Trp_2-1



E13,E14



BO_Trp_2-1



E15,E16



BO_Trp_3-1



E17,E18



BO_Trp_3-2



58



NO contacts, 1st group of MR trip output contacts NO contacts, 2nd group of MR trip output contacts NO contacts, 3rd group of MR trip output contacts NR ELECTRIC CO., LTD



Chapter 6 Hardware Description



Pin No.



Sign



E19,E20



BO_Trp_4-1



E21,E22



BO_Trp_4-2



E23,E24



BO_Trp_5-1



E25,E26



BO_Trp_5-2



Description NO contacts, 4th group of MR trip output contacts NO contacts, 5th group of MR trip output contacts



Annunciation signals (magnetic latched contact) E27,E28



BO_LossPwr_MR



NC contact, is closed when power of this module is lost.



6.3 Scheme Diagram of Input and Output of MR According to the difference of the importance of transformer MR protection, the mechanical signals are classified into three groups described in the following sections. They may lead to different equipment operation. (1) Some MR signals (MR5~MR9) needed to issue trip command directly are connected to pins A03, A05, A07, A09, and B03 to initiate trip output relays without time delay and send out warning signals immediately. (2) Some MR signals (MR1~MR3) needed to issue trip command with time delay are connected to pins 903, 905, 907 to initiate trip output relays with time delay which can be configured in the equipment, and send out warning signals immediately. This group, is (3) Some MR signals (MR10~MR16) only needed to issued warning signal are connected to pins B05, B07, B09, C03, C05, C07, C09 to send out warning signals immediately. Binary input of pole disagreement protection [BI_PD_CB] has two input pins: 909 for high voltage input, and 612 for 24Vdc input.



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59



Chapter 6 Hardware Description Ext._Pwr -



Ext._Pwr +



Contact from Transformer MR BI_MR1



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



R



RELAY



903



BI_MR2



929



905



BI_MR3 907 BI_PD_CB



909



BI_MR5



A03



Binary Input of Mechanical Signals



BI_MR6



A29



A05



BI_MR7



A07



BI_MR8



A09



BI_MR9



B03



BI_MR10



B19



B05



BI_MR11 B07 BI_MR12



B09



BI_MR13 C03 BI_MR14



C29



C05



BI_MR15 C07 BI_MR16 C09



Figure 6.3-1



MR input signals association diagram of RCS-974AG/AG2 Ext._Pwr +



Ext._Pwr -



Signals of MR protection without Time Delay to Initiate Trip Output Relay



Signals of MR protection with Time Delay to Initiate Trip Output Relay



Isolator Link BO_Dly_MR1



828



822



R R



Output Relay Group2



E01



BO_Dly_MR2



E30



E02



BO_Dly_MR3 824 Ext._Pwr + BO_MR5 A19



A11



BO_MR6 A13 BO_MR7 A15 BO_MR8 A17 BO_MR9 B19



Figure 6.3-2



60



820



Output Relay Group1



B11



MR tripping output contacts association diagram of RCS-974AG



NR ELECTRIC CO., LTD



Signals of MR protection without Time Delay to Initiate Trip Output Relay



Signals of MR protection with Time Delay to Initiate Trip Output Relay



Chapter 6 Hardware Description



Figure 6.3-3



MR tripping output contacts association diagram of RCS-974AG2



NOTE: MR Tripping output contacts association diagram of RCS-974AG (showed in Figure 6.3-3) is different to that of other RCS-974AG2 (showed in Figure 6.3-2), and tripping matrix is introduced in details in section 6.2.9.2.



6.4 Output Signals RCS-974 provides three kinds of signals for every event, remote signals, annunciation signals and FDR signals. The event may be a mechanical signal from transform mechanical relay, an equipment failure, an equipment alarm or activation of pole-disagreement protection element. All the signals are issued by closing the normal open contacts of signal relays whenever an event happens. What matters is that the local signal relay is a bistable-relay, whenever an event happens, the normal open contact of this relay will pick up and latch. The annunciation signal relay will not drop off automatically after the event disappears except to reset manually. Annunciation signal relays on No.7 BO and No.8 BO modules can be reset by the reset button on the equipment front panel or by the binary input [BI_RstTarg]. And annunciation signals on IO module can be reset by a reset input terminal.



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Chapter



62



6



Hardware



Description



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Chapter 7 Settings



Chapter 7 Settings The equipment has 30 setting groups for protection to coordinate with the mode of power system operation, one of which is assigned to be active. However, equipment parameters are common for all protection setting groups. NOTE All current settings in this chapter are secondary current converted from primary current by CT ratio.



7.1 Equipment Settings Table 7.1-1 Equipment setting list No.



Setting Item



Description



Range



1



Active_Grp



Current active group of setting



0~29



2



Comm_Addr



Communication address of the equipment



0~254



3



COM1_Baud



Baud rate of rear RS-485 port 1



4800, 9600, 19200,38400 bit/s



4



COM2_Baud



Baud rate of rear RS-485 port 2



4800, 9600, 19200,38400 bit/s



5



Printer_Baud



Baud Rate of rear printer port



4800, 9600, 19200,38400 bit/s



6



Debug_Baud



Baud rate of front RS-232 port for commissioning



4800, 9600 bit/s



7



fn



System frequency



8



I2n



Secondary rated current of CT



nominal



Remark



50,60 Hz 1 A or 5 A



9



Protocol



communication protocol



0~1



0: IEC 60870-5-103 or IEC 61850 1: LFP



10



Language



Select default displaying language



0~1



0：Chinese 1：English



11



Equip_ID



The identity of substation or plant



12



En_Net_Print



Enable/disable



NR ELECTRIC CO., LTD



a



network



1 or 0



0: net shared printer



63



Chapter 7 Settings



No.



Setting Item



Description



Range



printing



1: local printer



13



En_Auto_Print



Enable/disable automatic printing



1 or 0



14



GPS_Pulse



GPS clock synchronizing pulse



0~1



En_Remote_Cfg



Enable/disable configuring remotely



15



—



Explanation of Settings description



1.



Active_Grp



Remark



setting



1 or 0



0: automatic print 1: manual Print 0: PPS 1: PMS 0: local configuring 1: local and remote configuring



Current active group of setting; Thirty setting groups are provided for selecting, group number from 0 to 29. Equipment setup is shared for 30 setting groups and only protection settings are independent. 2.



Comm_Addr



Communication address between the equipment with the SCADA or RTU via RS-485; 3.



COM1_Baud, COM2_Baud, Printer_Baud



The three settings are the baud rate of RS-485 serial port 1, the baud rate of RS-485 serial port 2 and the baud rate of printer port on the rear panel of No.5 COM board respectively. When configuring [COM1_Baud], [COM2_Baud], please refer to section 6.2.5 for detailed port definition of different type communication modules. COM Type



4.



EQUIP SETTINGS



IP ADDRESS



[COM1_Baud]



[COM2_Baud]



[IP_Addr1]



[IP_Addr2]



[IP_Addr3]



[IP_Addr4]



A



RS-485-1



RS-485-2



Invalid



Invalid



Invalid



Invalid



B



Optic fibre-1



Optic fibre-1



Invalid



Invalid



Invalid



Invalid



E



Don’t modify



RS-485



Ethernet-1



Ethernet-2



Ethernet-3



Ethernet-4



Debug_Baud



Baud rate of front communication port （RS-232 port）for local communication with equipment on PC via the software RCSPC. 5.



En_Net_Print



If it is set as “1”, the equipment’s network printing function is enabled. Here, the printing serial port on rear panel of No.5 COM board must be configured as RS-485 way by setting dependent jumpers. On the contrary, if it is set as “0”, its network printing function is disabled. Report and settings can be printed by its directly connected local printer. At this time, the printing serial port on rear panel of No.5 COM board must be configured as RS-232 way by setting dependent jumpers.



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Chapter 7 Settings



Refer to section 6.2.5 for how to set dependent jumpers. 6.



En_Auto_Print



When it is set as “1”, the equipment will print trip report automatically once a tripping command is issued. On the contrary, if it is set as “0”, the equipment’s automatic printing function is disabled. 7.



Protocol



“0” means IEC 60870-5-103 protocol or IEC61850 protocol is selected. Which protocol is selected depends on the type of No.5 COM board. If type A or B is configured, then IEC 60870-5-103 is selected as communication protocol, and if type E is used, the IEC 61850 is selected. “1”: LFP protocol, a proprietary protocol developed by NR. 8.



GPS_Pulse



It is used together with a binary input [BI_Pulse_GPS] on No.6 BI board or with GPS clock synchronization port on No.5 COM board. If [GPS_Pulse] is set as “1”, the pulse input is pulse per minute (PPM), while if [GPS_Pulse] is set as “0”, the pulse input is pulse per second (PPS). 9.



En_Remote_Cfg



If it is set as “1”, the equipment’s settings can be remotely configured by substation automation system depending on the protocol. If it is set as “0”, the function is disabled. The point to be noted here is that no matter [En_Remote_Cfg] is set as “0” or “1”, equipment settings in submenu “EQUIP SETTINGS” can never be remotely modified.



7.2 Protection Settings NOTE: All the protection settings in Table 7.2-1 must be configured on the base of secondary value, where [I2n] is the secondary rated current of CT (refer to section 7.1). NOTE: Zero sequence current setting is configured according to 3I0 and negative sequence current setting is configured according to I2. Table 7.2-1 Protection settings list No.



Setting Item



Description



Range



Step



1



I1n_CT1



primary value of the first group of CT



0kA~650kA



0.01kA



2



I1n_CT2



primary value of the second group of CT



0kA~650kA



0.01kA



3



I_ROC_PD_CT1



zero sequence current setting of the first group of CT for pole disagreement protection



(0.01 ~ 20 )×In



0.01A



4



I_NegOC_PD_CT1



Negative sequence current setting



(0.01 ~ 20 )×In



0.01A



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65



Chapter 7 Settings



No.



Setting Item



Description



Range



Step



I_ROC_PD_CT2



zero sequence current setting of the second group of CT for pole disagreement protection



(0.01 ~ 20 )×In



0.01A



6



I_NegOC_PD_CT2



Negative sequence current setting of the second group of CT for pole disagreement protection



(0.01 ~ 20 )×In



0.01A



7



t_PD1



time delay for pole disagreement protection delay 2



0s - 10s



0.01s



8



t_PD2



time delay for pole disagreement protection delay 2



0s ~ 10s



0.01s



I_OC_BFI_CT1



overcurrent setting of the first group of CT for breaker failure initiation



(0.01 ~ 20 )×In



0.01A



I_ROC_BFI_CT1



zero sequence current setting of the first group of CT for breaker failure initiation element



(0.01 ~ 20 )×In



0.01A



I_NegOC_BFI_CT1



negative sequence current setting of the first group of CT for breaker failure initiation



(0.01 ~ 20 )×In



0.01A



I_OC_BFI_CT2



overcurrent setting of the second group of CT for breaker failure initiation



(0.01 ~ 20 )×In



0.01A



I_ROC_BFI_CT2



zero sequence current setting of the second group of CT for breaker failure initiation



(0.01 ~ 20 )×In



0.01A



14



I_NegOC_BFI_CT2



negative sequence current setting of the second group of CT for breaker failure initiation



(0.01 ~ 20 )×In



0.01A



15



t_BFI1



time delay for initiation delay 1



breaker



failure



0s - 10s



0.01s



16



t_BFI2



time delay for initiation delay 2



breaker



failure



0s ~ 10s



0.01s



17



t_FixDly_MR1



fixed time delay of MR1 for tripping



0s ~ 10s



0.01s



18



t_MR1



time delay of MR1 for tripping



0min ~ 100min



0.01min



19



t_MR2



time delay of MR2 for tripping



0min ~ 100min



0.01min



20



t_MR3



time delay of MR3 for tripping



0min ~ 100min



0.01min



of the first group of CT for pole disagreement protection 5



9



10



11



12



13



Logic setting:



66



NR ELECTRIC CO., LTD



Chapter 7 Settings



No.



Setting Item



Description



Range



Step



“1” for enabling and “0” for disabling corresponding protection or function element 21



En_PD1



enable pole protection delay 1



disagreement



22



En_PD2



enable pole protection delay 2



disagreement



23



En_ROC_PD



enable control element of zero sequence overcurrent for pole disagreement protection



1 or 0



24



En_NegOC_PD



enable control element for negative sequence overcurrent for pole disagreement protection



1 or 0



25



En_BFI



enable breaker failure initiation function.



1 or 0



26



En_ROC_BFI



enable zero sequence overcurrent element of breaker failure initiation



1 or 0



27



En_NegOC_BFI



enable negative sequence overcurrent element of breaker failure initiation



1 or 0



28



En_Dly_MR1



enable MR1 protection to issue a trip command after delay [t_MR1]



1 or 0



29



En_Dly_MR14CtrlMR1



enable MR14 to control MR1 protection



1 or 0



30



En_FixDly_MR1



enable MR1 to issue command after [t_FixDly_MR1]



1 or 0



31



En_Dly_MR2



enable MR2 to issue a trip command after delay [t_ MR2]



1 or 0



32



En_Dly_MR3



enable MR3 to issue a trip command after delay [t_ MR3]



1 or 0



33



Opt_CT_PD



Select CT group for disagreement protection



1 or 0



34



Opt_CT_BFI



Select CT group for breaker failure initiation



1 or 0



35



En_ExTCtrlBFI



enable external tripping signal to control breaker failure initiation



1 or 0



36



En_PD_Ctrl_BFI



enable pole disagreement position of CB to control breaker failure initiation



1 or 0



37



En_DFR_Pkp_DSP



Reserved



1 or 0



38



En_DFR_Trp_DSP



Reserved



1 or 0



39



En_DFR_BI_DSP



Reserved



1 or 0



40



En_VEBI_DSP



Reserved



1 or 0



41



En_ExTCtrlPD2



enable external tripping signal to control pole disagreement protection delay 2



1 or 0



NR ELECTRIC CO., LTD



a



trip delay



pole



1 or 0 1 or 0



67



Chapter 7 Settings



No.



Setting Item



Description



Range



42



En_52aCtrlBFI



enable breaker auxiliary contact controlling breaker failure initiation



1 or 0



43



En_OC_PD2



enable overcurrent for pole disagreement protection delay 2



1 or 0



— 1.



Step



Explanation of Settings description I1n_CT1, I1n_CT2



These are the primary values of the first group of CT and the second group of CT respectively. These values are set to meet substation automation system’s requirement. If someone is not used, it can be configured at will. 2.



I_OC_BFI_CT1 It is the overcurrent setting of the first group of CT for breaker failure initiation. NOTE: Overcurrent elements used in pole disagreement protection delay 2 and breaker failure initiation are the same one [I_OC_BFI_CT1].



3.



I_ROC_BFI_CT1 It is the zero sequence current setting of the first group of CT for breaker failure initiation.



4.



Opt_CT_PD It is the logic setting of selecting CT group for pole disagreement protection. if it is set “0”, means only the first group of CT is adopted for pole disagreement protection. If it is set “1”, indicates that both the first and the second group of CT are used for pole disagreement protection.



5.



Opt_CT_BFI It is the logic setting of selecting CT group for breaker failure initiation. If it is set “0”, means only the first group of CT is adopted for breaker failure initiation. If it is set “1”, indicates that both the first and the second group of CT are used breaker failure initiation.



6.



En_DFR_Pkp_DSP, En_DFR_Trp_DSP, En_DFR_BI_DSP, En_VEBI_DSP,



[En_DFR_Pkp_DSP] is reserved and must be set as “0”. [En_DFR_Trp_DSP] is reserved and must be set as “1”. [En_DFR_BI_DSP] is reserved and must be set as “0”. [En_VEBI_DSP] is reserved and must be set as “0”.



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Chapter 7 Settings



7.3 IP Address Settings These settings are used to set IP address of equipment Ethernet ports, when type 5E communication module is equipped for the equipment. Table 7.3-1 IP address settings list No.



Item



Description



1



IP_Addr1



IP address of Ethernet port 1 (COM1) of the equipment



2



IP_Addr2



IP address of Ethernet port 1 (COM2) of the equipment



3



IP_Addr3



IP address of Ethernet port 1 (COM3) of the equipment



4



IP_Addr4



IP address of Ethernet port 1 (COM4) of the equipment



IP address setting is in form of xxx.xxx.xxx.xxx, such as 198.87.191.25, and each byte section is in range of 0~255. Please refer to settings [COM1_Baud] and [COM2_Baud] in section 7.1 for configuring these settings.



7.4 MR Definition Settings These settings are only appeared in RCSPC software not in local LCD display, which are used to define MR signal to a specific MR name used on site. After new definition of MR is applied, then MR signal will be display in specific MR name in printed report and signals to SAS or RTU, but there are no changes for MR item in local LCD display. Table 7.4-1 MR display settings list No.



Item



Description



1



Definition_MR1



MR1 defined as a specific MR signal



2



Definition_MR2



MR2 defined as a specific MR signal



3



Definition_MR3



MR3 defined as a specific MR signal



4



Definition_MR4



MR4 defined as a specific MR signal



5



Definition_MR5



MR5 defined as a specific MR signal



6



Definition_MR6



MR6 defined as a specific MR signal



7



Definition_MR7



MR7 defined as a specific MR signal



8



Definition_MR8



MR8 defined as a specific MR signal



9



Definition_MR9



MR9 defined as a specific MR signal



10



Definition_MR10



MR10 defined as a specific MR signal



11



Definition_MR11



MR11 defined as a specific MR signal



12



Definition_MR12



MR12 defined as a specific MR signal



13



Definition_MR13



MR13 defined as a specific MR signal



14



Definition_MR14



MR14 defined as a specific MR signal



15



Definition_MR15



MR15 defined as a specific MR signal



16



Definition_MR16



MR16 defined as a specific MR signal



For example, Once “CoolFail” is defined for [Difinition_MR1], when MR1 operates with time delay, then binary input change report [BI_CoolFail] and trip report [Op_CoolFail] are sent to SAS or NR ELECTRIC CO., LTD



69



Chapter 7 Settings



RTU. If corresponding report is printed, then [BI_CoolFail] or [Op_CoolFail are in report instead of [BI_MR1] or [Op_MR1]. However local LDC there is still [BI_MR1] and [Op_MR2] displayed.



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Chapter 8 HMI Operation Instruction



Chapter 8 HMI Operation Instruction The operator can access the protective device from the front panel. Local communication with the protective device is possible using a computer with the RCSPC software via an RS-232 port on the front panel. Furthermore, remote communication is also possible using a PC with the RCS-9700 substation automation system via an RS-485 port. The operator is able to check the protective device status at any time. This chapter describes human machine interface (HMI), and give operator a instruction about how to display or print event report, setting and so on through HMI menu tree and display metering value, including mean current, voltage and frequency etc. through LCD. In the same time, how to change active setting group or a settable parameter value through keypad is also described in details.



8.1 Overview The human-machine interface consists of a human-machine interface (HMI) module which allows a communication to be as simple as possible for the user. The HMI module helps to draw your attention to something that has occurred which may activate a LED or a report displayed on the LCD. Operator can locate the data of interest by navigating the keypad.



Figure 8.1-1 the front panel The function of HMI module: No



Item



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Description



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Chapter 8 HMI Operation Instruction



No



Item



Description



1



LCD



A 240×128 dot matrix backlight LCD display is visible in dim lighting conditions. The corresponding messages are displayed when there is operation implemented.



2



LED



64 status indication LEDs



3



Keypad



Numeric keypad and command keys for full access to the equipment



4



Front port



DB9 RS-232 port for communication with a PC for local communication and DB15 port for testing by using HELP-90A



ESC



8.1.1 Keypad Operation



Figure 8.1-2 Keypad buttons



No.



Item



Function



1



“▲” and “▼”



move cursor left-fight among selectable target



2



“◄” and “►”



move cursor up-down among selectable target



3



“+” and “-”



add or subtract in the digit



4



ENT



provide Enter/Execute function



5



GRP



setting Group selection



5



ESC



exit the present menu or return to the upper menu



NOTE:



72



„



Any setting change operation should complete with simply pressing “+”, “◄”, “▲”, and “-” in sequence, as a password. Without the operation, modifying settings is invalid.



„



Report delete operation should executed by pressing “+”, “-”, “+”, “-”, “ENT” in sequence after exiting the main menu.



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8.1.2 LED Indicators



Figure 8.1-3 LED Indicators



Label



Status



Description



Off



The equipment is out of service or some hardware fault is detected by self-diagnostic facilities



HEALTH



ALRAM



Steady Green



The equipment is working on a correct order.



Off



The equipment is working on a correct order.



Steady Yellow



Some of CT circuit failure been detected, fault detector picks up over 10s, or breaker failure initiation picks up.



Off



No trip command is issued by pole disagreement protection.



Steady Red



A trip command has been issued by pole disagreement protection.



Off



No trip command is issued by mechanical protection with time delay (MR1-MR3).



Steady Red



A trip command has been issued by mechanical protection with time delay (MR1-MR3).



Off



No mechanical signal from transformer MR arriving at the equipment



Steady Red



A certain mechanical signal MRn arrives at related equipment terminal.



TRIP1



TRIP2



MECHn



NOTE: „



The LED “HEALTHY” can only be lit by supplying DC to equipment without alarms blocking equipment.



„



The LED “ALARM” can be lit when there is some abnormality such as CT circuit abnormality, pickup of breaker failure initiation, and when equipment returns to normal operating state, the LED can go off automatically.



„



The LED “MECH4” indicates the binary input status of pole disagreement



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([BI_PD_CB]). When [BI_PD_CB] is energized via the high voltage input terminal 910 and its status is “1”, LED “MECH4” is lit on, otherwise it is being in off state. „



When signal of MRn arrive at RCS-974, whether trip relay is driven to output or not, th corresponding LED “MECHn” is lit.



8.1.3 Communication Port



1



2



Figure 8.1-4 Communication ports No.



Item



1



DB9 RS-232 port for communication with a PC for local communication.



2



DB 15 port for analog test signal injection from HELP-90A tester.



8.1.4 TARGET RESET Button “TARGET RESET” is used to reset the LED “TRIP1” and “TRIP2” to off state and switch the LCD display between the latest alarm report display screen and normal readiness screen. In addition, when pressing the “TARGET RESET”, a normal open contact of reset relay on No.8 BO board via terminals 829-830 is closed. Where, the latest alarm report means the events included in “TRP REPORT”, “ALM REPORT” or “BI CHG REPORT” happen since been reset last time till the minute. All the events are circularly displayed one by one. NOTE：If the equipment is blocked or alarm signal is sent during operation, please find out the cause with the help of self-diagnose record. If the reason can’t be found on site, before the verification done by NR, please never attempt to press “TARGET RESET” button. That is because the fault can never be cleared by just press “TARGET RESET” button since the real cause of the fault has not been figured out.



8.2 Understand the HMI Menu Tree 8.2.1 Overview Please see the total command menu in following diagram which will be introduced in details. In order to enter the main menu, please press “▲” arrow button under the default display condition. If the current display is the latest report display, please press “TARGET RESET” button to return to the default display condition, and then press “▲” arrow button to enter the main menu. Please use the “▲” and ”▼“ buttons to scroll between the submenus, press “ENT” to enter the item chosen or press “ESC” to directly return to the upper level. 74



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1:VALUES



4:SETTINGS



1: DSP METERING



1: EQUIP SETTINGS



2: CPU METERING



2: PROT SETTINGS



3: PHASE ANGLE



3: IP ADDRESS



4: BI STATE



4: COPY SETTINGS



0: EXIT



0: EXIT



2:REPORT



5:CLOCK



1: TRP REPORT 2: ALM REPORT 3: BI CHG REPORT 0: EXIT



6:VERSION



3:PRINT 1: SETTINGS 2: TRP REPORT



7:LANGUAGE



3: ALM REPORT 4: BI CHG REPORT 5: PRESENT VALUES 6: VERSION 0: EXIT



0:EXIT



Figure 8.2-1 Menu tree for RCS-974



8.2.2 VALUES This menu displays the sampling value of current, voltage and phase angle and status of binary input, which can fully reflect the operation status of the protective device. Under normal conditions these displayed values should be consistent with the real values that have been injected. “VALUES” has the following submenus. No. 1



Item DSP METERING



Description To display sampled and calculated values on DSP chip.



2



CPU METERING



To display sampled and calculated values on CPU chip.



3



PHASE ANGLE



To display angles between different electric quantities.



4



BI STATE



To display states of binary inputs.



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8.2.3 REPORT This menu displays the information recorded by the RCS-974 for the tripping reports, alarm message reports and status change of binary input reports etc. All the reports are stored in non-volatile memory. No.



Item



Description



1



TRP REPORT



To display tripping report



2



ALM REPORT



To display equipment self-supervision and abnormal report



3



BI CHG REPORT



To display status change of binary input report



Please use “▲” and ”▼“ to choose the report under concern, and press “”ENT to display the chosen report. In the report display submenu, the latest report shall be displayed first. Press “-” button to display the previous report, and press “+” to display the next report. In case that a report is too long to be fully displayed on the LCD, you should press “▲” or “▼” to display the other parts of the report. In order to return to the upper submenu, simply press “ESC” button.



8.2.4 PRINT The settings list, wave recorder, tripping report, operation report, abnormality report and status change of binary input can be printed by this submenu. No.



Item



Description



1



SETTINGS



To print all settings of the protective device



2



TRP REPORT



To print tripping report



3



ALM REPORT



To print self-supervision report



4



BI CHG REPORT



To print status change of binary input report



5



PRESENT VALUE



To print current voltage and current value sampled



6



VERSION



To print software version information



Please use “▲” and “▼” to choose the item under concern, and press “ENT” to execute printing.



8.2.5 SETTINGS Use this menu to select and set the different parameters for protection and control functions in the RCS-974. There are 30 selectable and editable setting groups, each independent of the other, to structure desired functions and applications. This menu comprises the following submenus: No.



76



Item



Description



1



EQUIP SETTINGS



To view and modify equipment settings



2



PROT SETTINGS



To view and modify protection settings



3



IP ADDRESS



To view and modify Ethernet settings



4



COPY SETTINGS



To copy active setting group to other setting group



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Chapter 8 HMI Operation Instruction



Please use “▲” or “▼” to choose the setting under concern, and press “◄” or “►” to move the cursor to the digit to be changed. Press “+” or “-” button to change the data and then press “ENT” to confirm the setting change. If the setting change shall be terminated, simply press “ESC” to return, and the setting will remain unchanged.



8.2.6 CLOCK The internal clock for the RCS-974 can be viewed here. The time is displayed in the form YYYY-MM-DD and hh:mm:ss. All values are presented in digits. Please use “▲”, “▼”, “◄” or “►” to move the cursor to the digit to be changed. Press “+” or “-” button to change the data and then press “ENT” to confirm the change. If the setting change shall be terminated, simply press “ESC” to return, and the setting will remain unchanged.



8.2.7 VERSION This menu displays the version, verification code and creating time of the software applied in the equipment.



8.2.8 LANGUAGE This menu is optional for user to select multi-language display, and this menu may be different according to different customer equipments of language. “VERSION” has following submenus. No.



Item



Description



1



CHINESE



To set the Chinese as default displaying language.



2



ENGLISH



To set the English as default displaying language.



8.3 Understand the LCD Display 8.3.1 Main Display under Normal Operation Condition When the equipment is running normally, the LCD will display the following:



01 - 02 21 : 20 : 50 I_CT1 = 000.00 A I_CT2 = 000.00 A ActiveGrp



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01-02 21:20:50: shows that the current time and date in format: MM-DD hh;mm:ss. I_CT1: mean value of three phase current from CT1 I_CT2: mean value of three phase current from CT2 ActiveGrp 01: shows the active setting group :shows the communication with SCADA system is in normal state.



8.3.2 Display Tripping Report When the equipment tripping output operates, the LCD will display the report of the latest tripping action.



OP 000



07-02-27



14 : 21 : 51 : 115 MS Op_PD1 02011MS OP000: shows the serial number of the operation report. 07-02-27: shows that the date of the tripping operation report in format YY-MM-DD. 14:21:51:115MS: shows the absolute tripping time in format hh:mm:ss:ms. Op_PD1: shows the element having operated. 02011 MS: shows the operation time of the tripping or reclosing element exclude the operation time of output relay. All tripping or operating reports are list in following table. Table 8.3-1 Tripping reports No.



Item



Description



1



Op_PD1



Delay 1 of pole disagreement protection operates



2



Op_PD2



Delay 1 of pole disagreement protection operates



3



Op_MR1



MR1 protection operates with time delay



4



Op_MR2



MR2 protection operates with time delay



5



Op_MR3



MR3 protection operates with time delay



8.3.3 Display Abnormal Report When hardware failure is detected during self-check or an abnormality of system happens a new report will be automatically displayed on LCD as follows.



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ALM052



07-02-26



12 : 06 : 03 : 063 MS Alm_CTS_CT1



ALM052: serial number of the report. 07-02-26: shows the happening date of abnormality report in format YY-MM-DD. 12:06:03:063MS: shows the happening time of abnormality report in format hh:mm:ss:ms. Alm_CTS_CT1: shows abnormal element detected. Please refer to Table 4.3-1 for all abnormality alarms.



8.3.4 Display Status Change of Binary Input The LCD will automatically display a status change of binary inputs.



BI 034



07-02-26



12 : 06 : 03 : 441 MS BI_52a 0→1 BI 034: serial number of the report. 07-02-26: date in format of YY-MM-DD. 12:06:03:441MS: shows the happening time of status change in format of hh:mm:ss:ms. BI_52a 0→1: shows binary input name and status change action. Please refer to Table 5.2-3 for the all binary input change reports.



8.3.5 View the Settings Press “▲” to enter the main menu at first. Press key “▼” to select the item “SETTINGS” by scrolling the cursor downward, and then press key “ENT” to enter the submenu.



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SETTINGS 1. EQUIP SETTINGS 2. PROT SETTINGS 3. VEBI SETTINGS Press key “▼” to select the item “PROT SETTINGS” by scrolling the cursor downward. Press key “ENT” to display the setting symbols and parameters of the submenu. Please press key “▲” or “▼” to locate the setting. Simply press “ESC” to return without changing, and press “ENT” to input password to confirm the change.



Group 01 Setting I1n_CT1 012.00 kA I2n_CT2 8.3.6 View Records The RCS-974 provides the following recording functions: „



Event recording



Event recording are recorded in form of report and can be viewed through LCD or by printing. „



Disturbance recording



Disturbance recording is recorded in form of both report and waveform, so report can be display as event report. However waveform must to be printed or displayed with proper software. These recording reports can also be displayed through software by the local or remote PC. Press “▲” enter the main menu at first. Press key “▼” to select the item “REPORT” by scrolling the cursor downward, and then pressing key “ENT” will enter the submenu. Press key “▼” to select the target item by scrolling the cursor downward, and press key “ENT” to the next submenu.



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REPORT 1. TRP REPORT 2. ALM REPORT 3. BI CHG REPORT Then press key “▼” to select “TRP REPORT”, “ALM REPORT” or “BI CHG REPORT” by scrolling the cursor downward. Press key “ENT” to display the report selected. The latest report will be displayed firstly. Pressing key “+”or “-” will display next or previous report. If the report cannot be fully displayed in one screen, key “▲” or “▼” can be used to display the rest of it. Simply press key “ESC” or “ENT” to return the upper submenu.



8.3.7 Printing Reports and Waveform Press “▲” enter the main menu at first. Press key “▼” to select the item “PRINT” by scrolling the cursor downward, and then pressing key “ENT” will enter the submenu. Press key “▼” to select the target item by scrolling the cursor downward, and press key “ENT” to the next submenu.



PRINT 1. SETTINGS 2. TRP REPORT 3. ALM REPORT Then press key “▼” to select “SETTINGS”, “TRP REPORT”, “ALM REPORT” , “BI CHG REPORT”, “PRESENT VALUES” or “VERSION” or by scrolling the cursor downward. Press key “ENT” to print the report selected. Press key “+” or “-” to select next or previous report and press key “ENT”. Simply press key “ESC” to return the upper submenu. Take the “ALM REPORT” as an example.



Press TO Select Report



000 → 053



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Press “ENT” to print if there is a printer connected to the relay. If no printer is connected, the following information will be shown “NO Printer”.



8.4 Input Operation through Keypad 8.4.1 Change the Settings Press key “◄” or “►” to move the cursor to locate the setting you want to change by operating the keypad to modify it. Press key “+” and “-” to change the digit. Press key “ESC” to return to the upper level menu with the setting remain unchanged. Press key “ENT”, the LCD will prompt typing of password.



Password :



……



Press keys “+”, “◄”, “▲” and “–” sequentially, then the equipment will check the password automatically. If the password input is correct, modification of setting will be confirmed and the interface will return to submenu. If one or some settings input are detected to be off-limits, the cursor will locate where the first wrong setting is and the LCD will display “xxxxx SetInvalid”. (For example, “I1n_CT1 SetInvalid”) NOTE If the active group number or protection system parameter is changed, protective settings will be invalid and have to be configured again.



8.4.2 Copy Settings The relay stores 30 setting groups from No.0 to No.29. Only present setting group is active, others are provided for different operating conditions. The equipment settings are common for all these setting groups, but the protection settings are independent. Generally the equipment is delivered with default settings stored in active setting group “0”. The contents of other setting groups may be invalid. Therefore after application-specific settings for group No.0 have been ready, it is necessary to copy settings of group No.0 to all the other setting groups, and make some modification afterwards when necessary, so as to avoid entering all settings one by one. Press key “▲” to enter the main menu at first. Move cursor to the item “SETTINGS” and press key “ENT” to enter submenu. Press key “▼” and move cursor to the item “COPY SETTINGS” item 82



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and press “ENT” to display following interface.



COPY SETTINGS



Active Grp :



00



Target Grp :



01



Press key “+” and “-” to change digit where the cursor stays. Press “ENT” to confirm, then settings group 0 will be totally copied to settings group 1.



8.4.3 Switch Active Setting Group Sometimes it is necessary to switch among different setting groups to fit the different operating conditions. Press key “GRP” to display following interface.



Chg Act Grp



Active Grp :



00



Change to :



01



Press key “+” and “-” to change digit where the cursor stays. Press “ENT” to confirm. If the new active setting group is valid, LCD will display main configuration diagram. Otherwise, an alarm [Alm_InvalidGrp] will be issued and LED “HEALTHY” will go off. Then please modify this group settings to make them valid.



SetRefreshing …



8.4.4 Delete Fault Records and Event Records If you want to delete the content of fault records or event records, press key “▲” to enter the main menu at first and press “+”, “-”, “+”, “-”, “ENT” in sequence after exiting the main menu, then LCD NR ELECTRIC CO., LTD



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display following interface.



Press Press ESC To Exit



NOTE You have no choice to select which kind of records or which one record to be deleted but to delete all records. Press key “ENT” to delete all records and LCD will display “RptClearing...” then the reports will be deleted, or press key “ESC” to exit to main menu without deletion.



8.4.5 Adjusting the Clock If the clock of the equipment is not correct, please adjust it. Press key “▲” to enter the main menu at first. Move cursor to the item “CLOCK” and press key “ENT” to display following interface.



CLOCK



DATE :



2005 06 25



TIME :



09 08 39



2005 06 25: shows the data in format of YYYY-MM-DD. 09 08 39: shows the time in format of hh:mm:ss. Press keys “▲”, “▼”, “◄” and “►” to select the digit to be modified. Pressing key “+” and “-” to modify data. Press key “ESC” to return without modification. Press key “ENT” to confirm the modification and return to main menu.



8.4.6 View Software Version Press key “▲” to enter the main menu at first. Move cursor to the item “VERSION” and press key “ENT” to display following interface and then press key “ESC” to exit.



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RCS-974AG Project :



080110



Ver :



2.00



CRC :



F4B1



RCS-974AG CRC :



F4B1



2008-03-20 20 : 24 SUBQ :



00038913



RCS-974AG: shows the name of the protection program. Project: 070050: shows the project number is 070050. Ver: 2.00: shows the program version number CRC: F4B1: shows CRC (check code) of the program. 2008-03-20 20:24: shows the creating time of the program in format of YY-MM-DD HH:MM SUBQ: 00038913: shows management sequential number of the program. NOTE: What above figure shows is just an example to introduce the meaning of LCD display of software version, the actual version for user is application-specific.



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Chapter 9 Communications



Chapter 9 Communications 9.1 Overview This section outlines the remote communications interfaces of NR equipment. The protective device supports a choice of three protocols via the rear communication interface (RS-485 or Ethernet), selected via the model number by setting. The protocol provided by the protective device is indicated in the submenu in the “EQUIP SETTINGS” column. Using the keypad and LCD, set the parameter [Protocol], the corresponding protocol will be selected. The rear EIA RS-485 interface is isolated and is suitable for permanent connection of whichever protocol is selected. The advantage of this type of connection is that up to 32 protective devices can be “daisy chained” together using a simple twisted pair electrical connection. It should be noted that the descriptions contained within this section do not aim to fully detail the protocol itself. The relevant documentation for the protocol should be referred to for this information. This section serves to describe the specific implementation of the protocol in the relay.



9.2 Rear Communication Port Information 9.2.1 RS-485 Interface This protective device provides two rear RS-485 communication ports, and each port has three terminals in the 12-terminal screw connector located on the back of the relay and each port has a ground terminal for the earth shield of the communication cable. Please refer to the section of “Communication Interface module” for details of the connection terminals. The rear ports provide RS-485 serial data communication and are intended for use with a permanently wired connection to a remote control center. 9.2.1.1 EIA RS-485 Standardized Bus The EIA RS-485 two-wire connection provides a half-duplex fully isolated serial connection to the product. The connection is polarized and whilst the product’s connection diagrams indicate the polarization of the connection terminals it should be borne in mind that there is no agreed definition of which terminal is which. If the master is unable to communicate with the product, and the communication parameters match, then it is possible that the two-wire connection is reversed. 9.2.1.2 Bus Termination The EIA RS-485 bus must have 120Ω (Ohm) ½ Watt terminating resistors fitted at either end across the signal wires (refer to Figure 9.2-1). Some devices may be able to provide the bus terminating resistors by different connection or configuration arrangements, in which case separate external components will not be required. However, this product does not provide such a facility, so if it is located at the bus terminus then an external termination resistor will be required.



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Figure 9.2-1 EIA RS-485 bus connection arrangements 9.2.1.3 Bus Connections & Topologies The EIA RS-485 standard requires that each device is directly connected to the physical cable that is the communications bus. Stubs and tees are expressly forbidden, such as star topologies. Loop bus topologies are not part of the EIA RS-485 standard and are forbidden by it also. Two-core screened cable is recommended. The specification of the cable will be dependent on the application, although a multi-strand 0.5mm2 per core is normally adequate. Total cable length must not exceed 500m. The screen must be continuous and connected to ground at one end, normally at the master connection point; it is important to avoid circulating currents, especially when the cable runs between buildings, for both safety and noise reasons. This product does not provide a signal ground connection. If a signal ground connection is present in the bus cable then it must be ignored, although it must have continuity for the benefit of other devices connected to the bus. At no stage must the signal ground be connected to the cables screen or to the product’s chassis. This is for both safety and noise reasons. 9.2.1.4 Biasing It may also be necessary to bias the signal wires to prevent jabber. Jabber occurs when the signal level has an indeterminate state because the bus is not being actively driven. This can occur when all the slaves are in receive mode and the master is slow to turn from receive mode to transmit mode. This may be because the master purposefully waits in receive mode, or even in a high impedance state, until it has something to transmit. Jabber causes the receiving device(s) to miss the first bits of the first character in the packet, which results in the slave rejecting the message and consequentially not responding. Symptoms of these are poor response times (due to retries), increasing message error counters, erratic communications, and even a complete failure to communicate. Biasing requires that the signal lines be weakly pulled to a defined voltage level of about 1V. There should only be one bias point on the bus, which is best situated at the master connection point. The DC source used for the bias must be clean; otherwise noise will be injected. Note that some devices may (optionally) be able to provide the bus bias, in which case external components will not be required. NOTE:



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„



It is extremely important that the 120Ω termination resistors are fitted. Failure to do so will result in an excessive bias voltage that may damage the devices connected to the bus.



„



As the field voltage is much higher than that required, NR cannot assume responsibility for any damage that may occur to a device connected to the network as a result of incorrect application of this voltage.



„



Ensure that the field voltage is not being used for other purposes (i.e. powering logic inputs) as this may cause noise to be passed to the communication network.



9.2.2 Ethernet Interface This protective device can provide four rear Ethernet interfaces (optional) and they are unattached each other. Parameters of each Ethernet port can be configured in the submenu “IP ADDRESS”. 9.2.2.1 Ethernet Standardized Communication Cable It is recommended to use twisted screened eight-core cable as the communication cable. A picture is shown bellow.



Figure 9.2-2 Ethernet communication cable 9.2.2.2 Connections and Topologies Each equipment is connected with an exchanger via communication cable, and thereby it forms a star structure network. Dual-network is recommended in order to increase reliability. SCADA is also connected to the exchanger and will play a role of master station, so the every equipment which has been connected to the exchanger will play a role of slave unit.



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Figure 9.2-3 Ethernet communication structure



9.2.3 IEC60870-5-103 Communication The IEC specification IEC60870-5-103: Telecontrol Equipment and Systems, Part 5: Transmission Protocols Section 103 defines the use of standards IEC60870-5-1 to IEC60870-5-5 to perform communication with protective device. The standard configuration for the IEC60870-5-103 protocol is to use a twisted pair EIA RS-485 connection over distances up to 500m. It also supports to use an Ethernet connection. The relay operates as a slave in the system, responding to commands from a master station. To use the rear port with IEC60870-5-103 communication, the relevant settings ot the protective device must be configured. To do this use the keypad and LCD user interface. In the submenu “EQUIP SETTINGS”, set the parameters [Protocol] as “0”, [COM1_Baud] and [COM2_Baud] as “9600”. For using the Ethernet port with IEC60870-5-103 communication, the IP address and submask of each Ethernet port can be set in the submenu “IP ADDRESS”. Please refer to the corresponding section in Chapter “Settings” for further details.



9.3 IEC60870-5-103 Interface over Serial Port The IEC60870-5-103 interface over serial port (RS-485) is a master/slave interface with the protective device as the slave device. It is properly developed by NR. The protective device conforms to compatibility level 2; compatibility level 3 is not supported. The following IEC60870-5-103 facilities are supported by this interface: „



Initialization (reset)



„



Time synchronization



„



Event record extraction



„



General interrogation



„



General functions



„



Disturbance records



9.3.1 Physical Connection and Link Layer Two EIA RS-485 standardized ports are available for IEC60870-5-103 in this protective device. The transmission speed is optional: 4800 bit/s, 9600 bit/s, 19200 bit/s or 38400 bit/s. The link layer strictly abides by the rules defined in the IEC60870-5-103.



9.3.2 Initialization Whenever the protective device has been powered up, or if the communication parameters have been changed, a reset command is required to initialize the communications. The protective device will respond to either of the two reset commands (Reset CU or Reset FCB), the difference is that the Reset CU will clear any unsent messages in the transmit buffer.



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The protective device will respond to the reset command with an identification message ASDU 5, the COT (Cause Of Transmission) of this response will be either Reset CU or Reset FCB depending on the nature of the reset command.



9.3.3 Time Synchronization The protective device time and date can be set using the time synchronization feature of the IEC60870-5-103 protocol. The protective device will correct for the transmission delay as specified in IEC60870-5-103. If the time synchronization message is sent as a send/confirm message then the protective device will respond with a confirmation. Whether the time-synchronization message is sent as a send confirmation or a broadcast (send/no reply) message, a time synchronization class 1 event will be generated/produced. If the protective device clock is synchronized using the IRIG-B input then it will not be possible to set the protective device time using the IEC60870-5-103 interface. An attempt to set the time via the interface will cause the protective device to create an event with the current date and time taken from the IRIG-B synchronized internal clock.



9.3.4 Spontaneous Events Events are categorized using the following information:



1.



„



Type identification (TYP)



„



Function type (FUN)



„



Information number (INF)



The following table contains a complete listing of all events produced by the protective device. For the details about this events. TYP



ASDU 2



ASDU 1



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FUN



INF



COT



Event Name



194



116



1



Op_PD1



194



117



1



Op_PD2



194



102



1



Op_MR1



194



181



1



Op_MR2



194



182



1



Op_MR3



194



84



1



EBI_PD



194



85



1



EBI_Dly_MR



194



18



1



BI_ExTCtrlBFI



194



17



1



BI_ExTCtrlPD2



194



83



1



BI_52a



194



83



1



Reserved



194



189



1



BI_Pwr_Opto



194



83



1



BI_PD_CB



194



189



1



BI_TripOut



194



176



1



BI_MR1



194



177



1



BI_MR2



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TYP



FUN



INF



COT



Event Name



194



178



1



BI_MR3



194



194



1



Alm_RAM



194



195



1



Alm_ROM



194



196



1



Alm_EEPROM



194



86



1



Alm_InvalidGrp



194



33



1



Alm_Smpl_CPU



194



214



1



Alm_PersistFD



194



104



1



Alm_Smpl_DSP



194



247



1



Alm_TrpOut



194



103



1



Alm_Setting



194



180



1



Alm_BI_PD



194



202



1



Alm_Pwr_Opto



194



119



1



Alm_Pkp_BFI1



194



180



1



Alm_BI_ExTrp



194



3



1



Alm_CTS_CT1



194



3



1



Alm_CTS_CT2



194



119



1



Alm_Pkp_BFI2



194



10



1



Alm_MR5



194



11



1



Alm_MR6



194



12



1



Alm_MR7



194



135



1



Alm_MR8



194



248



1



Alm_MR9



194



134



1



Alm_MR10



194



132



1



Alm_MR11



194



249



1



Alm_MR12



194



148



1



Alm_MR13



194



136



1



Alm_MR14



194



145



1



Alm_MR15



194



179



1



Alm_MR16



194



20



1



BI_BlkComm



9.3.5 General Interrogation The GI can be used to read the status of the relay, the function numbers, and information numbers that will be returned during the GI cycle. The GI cycle strictly abides by the rules defined in the IEC60870-5-103. Refer the IEC60870-5-103 standard can get the enough details about general interrogation.



9.3.6 General Functions The generic functions can be used to read the setting and protection measurement of the relay, and modify the setting. Two supported type identifications are ASDU 21 and ASDU 10. For more details about generic functions, see the IEC60870-5-103 standard.



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Group Number 0



Group type Device Description



1



Equip Settings



2



Setting Group



3



Setting



9



Measurement



11



Net Setting



NOTE：If the setting [En_Remote_Cfg] in the submenu “EQUIP SETTINGS” is set as “0”, to modify protection settings remotely will not be allowed. Moreover, equipment parameters are not allowed to be modified remotely whether the item [En_Remote_Cfg] is “1” or “0”.



9.3.7 Disturbance Records This protective device can store up to eight disturbance records in its memory. A pickup of the fault detector or an operation of the relay can make the protective device store the disturbance records. The disturbance records are stored in uncompressed format and can be extracted using the standard mechanisms described in IEC60870-5-103. ACC 64



Content Ia_1



65



Ib_1



66



Ic_1



67



I30_1



68



Ia_2



69



Ib_2



70



Ic_2



71



3I0_2



9.4 IEC60870-5-103 Interface over Ethernet The IEC60870-5-103 interface over Ethernet is a master/slave interface with the relay as the slave device. It is properly developed by NR too. All the service of this relay is based on generic functions of the IEC60870-5-103. The following table lists all the group number of this relay. And this relay will send all the relevant information about group caption to the SAS or RTU after establishing a successful communication link. Group Number



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Group Caption Description



0



Device Description



1



Device Parameter



2



Setting Group



3



Setting



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Group Number



Group Caption Description



9



Measurement



10



Fault Data



11



Net Setting



12



Enabling BI



13



Operation Element



14



Alarm Info



15



Disturbance Info List



9.5 Modbus Protocol over Serial Port 9.5.1 Overview The RCS-985T relay support several communications protocols to allow the connection to the equipment such as personal computers, RTUs, SCADA masters, and programmable logic controllers. The Modicon Modbus RTU protocol is the most basic protocol supported by the RCS-985T. Modbus is available via RS485 serial links or via Ethernet (using the Modbus/TCP specification). The following information is provided primarily for users who wish to develop their own master communication drivers and applies to the serial Modbus RTU protocol. The characteristics are listed below: z



Standard: Modicon Modbus Protocol Reference Guide, PI-MBUS-300 Rev.E



z



Physical Layer Setup: RS485, 1 start bit,8 data bits, no bit for parity,1 stop bit



z



Link Layer Setup: Only RTU Mode Supported



z



Frame Length Up limit: 256 Bytes



z



Baud Rate: Configurable



z



Device Address: Configurable



z



Parity: no



The following Modbus function codes are supported but re-defined by the relay: 02 Read Input Status-Get real-time statuses (binary) 03 Read Holding Registers- Get Settings 04 Read Input Registers- Get metering values of equipment



9.5.2 Fetch real Time Status (Binary) Function Code: 02H This function reads the ON/OFF status of discrete inputs in the slave. The status in the response message is packed as one input per bit of the data field. Status is indicated as: 1 = ON; 0 = OFF.



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The LSB of the first data byte contains the input addressed in the query. The other inputs follow toward the high order end of this byte, and from ‘low order to high order’ in subsequent bytes. Example 1: If the master wants to fetch Trip Information (0000H~0003H), the query frame would be as follows (Suppose the slave address was 1): 01



02



00



00



00



04



79



C9



Slave Addr



Function Code



Start Register Addr Hi



Start Register Addr Lo



Num of Status Hi



Num of Status Lo



CRC Lo



CRC Hi



The response fame would be as follows (Suppose the value of 0000H~0003H equal to 1,1,0,1 respectively): 01



02



01



0B



E0



4F



Slave Addr



Function Code



Length



Status



CRC Lo



CRC Hi



Example 2: If the master wants to fetch Trip Information (0002H~000DH), the query frame would be as follows (Suppose the slave address was 1): 01



02



00



02



00



0C



D9



CF



Slave Addr



Function Code



Start Register Addr Hi



Start Register Addr Lo



Num of Status Hi



Num of Status Lo



CRC Lo



CRC Hi



The response fame would be as follows (Suppose the value of 0002H~000DH equal to 1,1,0,1,0,0,1,0,1,1,1,0 respectively): 01



02



02



07



4B



FB



BF



Slave Addr



Function Code



Length



Status Hi



Status Lo



CRC Lo



CRC Hi



9.5.2.1 Trip Information Value of corresponding Bit=1: operate, 0: drop back or not operate Address



Item Name



Address



Item Name



0000H



Op_PD1



0003H



Op_MR2



0001H



Op_PD2



0004H



Op_MR3



0002H



Op_MR1



9.5.2.2 Alarm Information “1” means alarm,”0” for no alarm or draw off. Address



Item Name



Address



Item Name



1000H



Alm_Smpl_DSP



1013H



Alm_MR8



1001H



Alm_TrpOut



1014H



Alm_MR9



1002H



Alm_Setting



1015H



Alm_MR10



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Address



Item Name



Address



Item Name



1003H



Alm_BI_PD



1016H



Alm_MR11



1004H



Alm_Pwr_Opto



1017H



Alm_MR12



1005H



Alm_Pkp_BFI1



1018H



Alm_MR13



1006H



Alm_BI_ExTrp



1019H



Alm_MR14



1007H



Alm_CTS_CT1



101AH



Alm_MR15



1008H



Alm_CTS_CT2



101BH



Alm_MR16



1009H



Alm_Pkp_BFI2



101CH



Reserved



100AH



Reserved



101DH



Reserved



100BH



Reserved



101EH



Reserved



100CH



Reserved



101FH



Reserved



100DH



Reserved



1020H



Alm_RAM



100EH



Reserved



1021H



Alm_ROM



100FH



Reserved



1022H



Alm_EEPROM



1010H



Alm_MR5



1023H



Alm_InvalidGrp



1011H



Alm_MR6



1024H



Alm_Smpl_CPU



1012H



Alm_MR7



1025H



Alm_PersistFD



9.5.2.3 BinaryInput Change Information “1” means binary change,”0” for no change or draw off. Address



Item Name



Address



Item Name



2000H



EBI_PD



2008H



BI_PD_CB



2001H



EBI_Dly_MR



2009H



BI_TripOut



2002H



BI_ExTCtrlBFI



200AH



BI_MR1



2003H



BI_ExTCtrlPD2



200BH



BI_MR2



2004H



BI_52a



200CH



BI_MR3



2005H



Reserved



200DH



Reserved



2006H



Reserved



200EH



Reserved



2007H



BI_Pwr_Opto



200FH



FD_CPU



9.5.3 Fetch Metering Values of Equipment Function Code: 04H The metering values in the response message are packed as two bytes per register. For each register, the first byte contains the high order bits and the second contains the low order bits. Register



96



Content



Unit



0000H



PhaseACurr1



(2 digits decimal)



A



0001H



PhaseBCurr1



(2 digits decimal)



A



0002H



PhaseCCurr1



(2 digits decimal)



A



0003H



ZeroSeqCurr1



(2 digits decimal)



A



0004H



NegSequenceCurr1(2 digits decimal)



A



0005H



PhaseACurr2



A



(2 digits decimal)



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0006H



PhaseBCurr2



(2 digits decimal)



A



0007H



PhaseCCurr2



(2 digits decimal)



A



0008H



ZeroSeqCurr2



(2 digits decimal)



A



0009H



NegSequenceCurr2(2 digits decimal)



A



9.5.4 Fetch Settings Value of Equipment Function Code: 03H 9.5.4.1 Equipment Settings Table 9.5-1 Register



Equipment settings Content



0000H



Active_Grp



0001H



Comm_Addr



0002H



COM1_Baud



Bps



0003H



COM2_Baud



Bps



0004H



Printer_Baud



0005H



Debug_Baud



0006H



fn



0007H



I2n



0008H



Protocol



0009H



Equip_ID (H byte)



000AH



Equip_ID (M byte)



000BH



Equip_ID (Lbyte)



A



Bit0: En_Net_Print 000CH



Control word



Bit1: En_Auto_Print Bit2: GPS_Pulse Bit3: En_Remote_Cfg Bit4: Iec103.Inf



9.5.4.2 Protection Settings Table 9.5-2 Register



Protection settings Content



Unit



1000H



I1n_CT1 (2 digits decimal)



kA



1001H



I1n_CT2 (2 digits decimal)



kA



1002H



I_ROC_PD_CT1 (2 digits decimal)



A



1003H



I_NegOC_PD_CT1 (2 digits decimal)



A



1004H



I_ROC_PD_CT2 (2 digits decimal)



A



1005H



I_NegOC_PD_CT2 (2 digits decimal)



A



1006H



T_PD1(2 digits decimal)



s



1007H



T_PD2(2 digits decimal)



s



1008H



I_OC_BFI_CT1 (2 digits decimal)



A



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Register



Content



Unit



1009H



I_ROC_BFI_CT1 (2 digits decimal)



A



100AH



I_NegOC_BFI_CT1 (2 digits decimal)



A



100BH



I_OC_BFI_CT2 (2 digits decimal)



A



100CH



I_ROC_BFI_CT2 (2 digits decimal)



A



100DH



I_NegOC_BFI_CT2 (2 digits decimal)



A



100EH



t_BFI1(2 digits decimal)



s



100FH



t_BFI2(2 digits decimal)



s



1010H



t_FixDly_MR1 (2 digits decimal)



min



1011H



t_MP1(2 digits decimal)



min



1012H



t_MP2(2 digits decimal)



min



1013H



t_MP3(2 digits decimal)



s



Bit0: En_PD1 Bit1: En_PD2 Bit2: En_ROC_PD Bit3: En_NegOC_PD Bit4: En_BFI Bit5: En_ROC_BFI Bit6: En_NegOC_BFI 1014H



Control word 1



Bit7: En_Dly_MR1 Bit8: En_Dly_MR14CtrlMR1 Bit9: En_FixDly_MR1 Bit10: En_Dly_MR2 Bit11: En_Dly_MR3 Bit12: Opt_CT_PD Bit13: Opt_CT_BFI Bit14: En_ExTCtrlBFI Bit15: En_PD_Ctrl_BFI Bit0: En_DFR_Pkp_DSP Bit1: En_DFR_Trp_DSP



1015H



Control word 2



Bit2: En_DFR_BI_DSP Bit3: En_VEBI_DSP Bit4: En_ExTCtrlPD2 Bit5: En_52aCtrlBFI Bit6: En_OC_PD2



9.5.5 Diagnostics (Function Code: 08H) Modbus function 08 provides a series of tests for checking the communication system between the master and slave, or for checking various internal error conditions within the slave. The function uses a two–byte sub-function code field in the query to define the type of test to be performed. The slave echoes both the function code and sub-function code in a normal response. The listing below shows the sub-function codes supported by the equipment. 98



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Table 9.5-3



Diagnostics information



Sub function No.



Description



00H



Query link layer status



01H



Reset communication



04H



Listen only mode



0BH



Number of Frames received



0CH



Number of Frames that CRC are wrong



0DH



Number of Frames that make device exceptional



0EH



Number of Frames that address is same to device or is broadcast and the device has processed.



0FH



Number of Frames that device have no response.



9.5.6 Exception Responses Except for broadcast messages, when a master device sends a query to a slave device it expects a normal response. If the slave receives the query without a communication error but the salve cannot handle it (for example, if the request is to read a non–existent coil or register), the slave will return an exception response informing the master of the nature of the error. The listing below shows the exception codes supported by the equipment. Code



Description



01H



Illegal Function



02H



Illegal Data Address



9.6 Messages Description for IEC61850 Protocol 9.6.1 Overview The IEC 61850 standard is the result of years of work by electric utilities and vendors of electronic equipment to produce standardized communications systems. IEC 61850 is a series of standards describing client/server and peer-to-peer communications, substation design and configuration, testing, environmental and project standards. The complete set includes: „



IEC 61850-1: Introduction and overview



„



IEC 61850-2: Glossary



„



IEC 61850-3: General requirements



„



IEC 61850-4: System and project management



„



IEC 61850-5: Communications and requirements for functions and device models



„



„



„



IEC 61850-6: Configuration description language for communication in electrical substations related to IEDs IEC 61850-7-1: Basic communication structure for substation and feeder equipment Principles and models IEC 61850-7-2: Basic communication structure for substation and feeder equipment -



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Abstract communication service interface (ACSI) „



„



„



„



„



„



IEC 61850-7-3: Basic communication structure for substation and feeder equipment – Common data classes IEC 61850-7-4: Basic communication structure for substation and feeder equipment – Compatible logical node classes and data classes IEC 61850-8-1: Specific Communication Service Mapping (SCSM) – Mappings to MMS (ISO 9506-1 and ISO 9506-2) and to ISO/IEC 8802-3 IEC 61850-9-1: Specific Communication Service Mapping (SCSM) – Sampled values over serial unidirectional multidrop point to point link IEC 61850-9-2: Specific Communication Service Mapping (SCSM) – Sampled values over ISO/IEC 8802-3 IEC 61850-10: Conformance testing



These documents can be obtained from the IEC (http://www.iec.ch). It is strongly recommended that all those involved with any IEC 61850 implementation obtain this document set.



9.6.2 Communication Profiles The RCS-900 series relay supports IEC 61850 server services over TCP/IP communication protocol stacks. The TCP/IP profile requires the RCS-900 series to have an IP address to establish communications. These addresses are located in the submenu “IP ADDRESS“. Please refer to section 7.3 for further details. 1.



MMS protocol



IEC 61850 specifies the use of the Manufacturing Message Specification (MMS) at the upper (application) layer for transfer of real-time data. This protocol has been in existence for a number of years and provides a set of services suitable for the transfer of data within a substation LAN environment. Actual MMS protocol services are mapped to IEC 61850 abstract services in IEC61850-8-1. 2.



Client/server



This is a connection-oriented type of communication. The connection is initiated by the client, and communication activity is controlled by the client. IEC61850 clients are often substation computers running HMI programs or SOE logging software. Servers are usually substation equipment such as protection relays, meters, RTUs, transformer, tap changers, or bay controllers. 3.



Peer-to-peer



This is a non-connection-oriented, high speed type of communication usually between substation equipment, such as protection relays. GOOSE is the method of peer-to-peer communication. 4.



Substation configuration language (SCL)



A substation configuration language is a number of files used to describe the configuration of substation equipment. Each configured device has an IEC Capability Description (ICD) file and a 100



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Configured IED Description (CID) file. The substation single line information is stored in a System Specification Description (SSD) file. The entire substation configuration is stored in a Substation Configuration Description (SCD) file. The SCD file is the combination of the individual ICD files and the SSD file.



9.6.3 Server Data Organization IEC61850 defines an object-oriented approach to data and services. An IEC61850 physical device can contain one or more logical device(s) (for proxy). Each logical device can contain many logical nodes. Each logical node can contain many data objects. Each data object is composed of data attributes and data attribute components. Services are available at each level for performing various functions, such as reading, writing, control commands, and reporting. Each IED represents one IEC61850 physical device. The physical device contains one logical device, and the logical device contains many logical nodes. The logical node LPHD contains information about the IED physical device. The logical node LLN0 contains information about the IED logical device. 9.6.3.1 Digital Status Values The GGIO logical node is available in the RCS-900 series relays to provide access to digital status points (including general I/O inputs and warnings) and associated timestamps and quality flags. The data content must be configured before the data can be used. GGIO provides digital status points for access by clients. It is intended that clients use GGIO in order to access digital status values from the RCS-900 series relays. Clients can utilize the IEC61850 buffered reporting features available from GGIO in order to build sequence of events (SOE) logs and HMI display screens. Buffered reporting should generally be used for SOE logs since the buffering capability reduces the chances of missing data state changes. All needed status data objects are transmitted to HMI clients via buffered reporting, and the corresponding buffered reporting control block (BRCB) is defined in LLN0. 9.6.3.2 Analog Values Most of analog measured values are available through the MMXU logical nodes, and metering values in MMTR, the else in MMXN, MSQI and so on. Each MMXU logical node provides data from a IED current/voltage “source”. There is one MMXU available for each configurable source. MMXU1 provides data from CT/VT source 1(usually for protection purpose), and MMXU2 provides data from CT/VT source 2 (usually for monitor and display purpose). All these analog data objects are transmitted to HMI clients via unbuffered reporting periodically, and the corresponding unbuffered reporting control block (URCB) is defined in LLN0. MMXUx logical nodes provide the following data for each source: „



MMXU.ST.Hz: frequency



„



MMXU.ST.PPV.phsAB: phase AB voltage magnitude and angle



„



MMXU.ST.PPV.phsBC: phase BC voltage magnitude and angle



„



MMXU.ST.PPV.phsCA: Phase CA voltage magnitude and angle



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MMXU.ST.PhV.phsA: phase AG voltage magnitude and angle



„



MMXU.ST.PhV.phsB: phase BG voltage magnitude and angle



„



MMXU.ST.PhV.phsC: phase CG voltage magnitude and angle



„



MMXU.ST.A.phsA: phase A current magnitude and angle



„



MMXU.ST.A.phsB: phase B current magnitude and angle



„



MMXU.ST.A.phsC: phase C current magnitude and angle



9.6.3.3 Protection Logical Nodes The following list describes the protection elements for all RCS-900 series relays. The specified relay will contain a subset of protection elements from this list. „



PDIF: current differential and transfer trip



„



PDIS: phase-to-phase distance, phase-to-ground distance and SOTF distance



„



PTUC: undercurrent



„



PTOC: phase overcurrent, zero sequence overcurrent and overcurrent when CTS



„



PTUV: undervoltage



„



PTUF: underfrequency



„



PTOV: overvoltage and auxiliary overvoltage



„



RREC: automatic reclosing



The protection elements listed above contain start (pickup) and operate flags, instead of any element has its own start (pickup) flag separately, all the elements share a common start (pickup) flags “PTRC.ST.Str.general”. The operate flag for PTOC1 is “PTOC1.ST.Op.general”. For the RCS-900 series relay protection elements, these flags take their values from related module for the corresponding element. Similar to digital status values, the protection trip information is reported via BRCB, and it also locates in LLN0. 9.6.3.4 LLN0 and Other Logical Nodes Logical node LLN0 is essential for an IEC61850 based IED. This LN shall be used to address common issues for Logical Devices. Most of the public services, the common settings, control values and some device oriented data objects are available here. The public services may be BRCB, URCB and GSE control blocks and similar global defines for the whole device; the common settings include all the setting items of communication settings. System settings and some of the protection setting items, which can be configured to two or more protection elements (logical nodes). In LLN0, the item Loc is a device control object, this Do item indicates the local operation for complete logical device, when it is true, all the remote control commands to the IED will be blocked and those commands make effective until the item Loc is changed to false. In RCS-900 series relays, besides the logical nodes we describe above, there are some other logical nodes below in the IEDs:



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„



„



LPHD: Physical device information, the logical node to model common issues for physical device. PTRC: Protection trip conditioning, it shall be used to connect the “operate” outputs of one or more protection functions to a common “trip” to be transmitted to XCBR. In addition or alternatively, any combination of “operate” outputs of protection functions may be combined to a new “operate” of PTRC. RDRE: Disturbance recorder function. It triggers the fault wave recorder and its output refers to the “IEEE Standard Format for Transient Data Exchange (COMTRADE) for Power System” (IEC 60255-24). All enabled channels are included in the recording, independently of the trigger mode.



9.6.4 Server Features and Configuration 9.6.4.1 Buffered/unbuffered Reporting IEC61850 buffered and unbuffered reporting control blocks locate in LLN0, they can be configured to transmit information of protection trip information (in the Protection logical nodes), binary status values (in GGIO) and analog measured/calculated values (in MMXU, MMTR and MSQI). The reporting control blocks can be configured in CID files, and then be sent to the IED via an IEC61850 client. The following items can be configured. „



TrgOps: Trigger options. The following bits are supported by the RCS-900 series relays: － Bit 1: Data-change － Bit 4: Integrity － Bit 5: General interrogation



„



OptFlds: Option Fields. The following bits are supported by the RCS-900 series relays: － Bit 1: Sequence-number － Bit 2: Report-time-stamp － Bit 3: Reason-for-inclusion － Bit 4: Data-set-name － Bit 5: Data-reference － Bit 6: Buffer-overflow (for buffered reports only) － Bit 7: EntryID (for buffered reports only) － Bit 8: Conf-revision － Bit 9: Segmentation



„



IntgPd: Integrity period.



„



BufTm: Buffer time.



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9.6.4.2 File Transfer MMS file services are supported to allow transfer of oscillography, event record or other files from a RCS-900 series relay. 9.6.4.3 Timestamps The timestamp values associated with all IEC61850 data items represent the time of the last change of either the value or quality flags of the data item. 9.6.4.4 Logical Node Name Prefixes IEC61850 specifies that each logical node can have a name with a total length of 11 characters. The name is composed of: „



A five or six-character name prefix.



„



A four-character standard name (for example, MMXU, GGIO, PIOC, etc.).



„



A one or two-character instantiation index.



Complete names are of the form xxxxxxPTOC1, where the xxxxxx character string is configurable. Details regarding the logical node naming rules are given in IEC61850 parts 6 and 7-2. It is recommended that a consistent naming convention be used for an entire substation project. 9.6.4.5 GOOSE Services IEC61850 specifies the type of peer-to-peer data transfer services: Generic Object Oriented Substation Events (GOOSE). IEC61850 GOOSE services provide virtual LAN (VLAN) support, Ethernet priority tagging, and Ether-type Application ID configuration. The support for VLANs and priority tagging allows for the optimization of Ethernet network traffic. GOOSE messages can be given a higher priority than standard Ethernet traffic, and they can be separated onto specific VLANs. Devices that transmit GOOSE messages also Devices that transmit GOOSE messages also function as servers. Each GOOSE publisher contains a “GOOSE control block” to configure and control the transmission. The transmission is also controlled via device setting “GOOSE Group ID” in the setting submenu “EQUIP SETUP”. The “GOOSE Group ID” setting item defines a definite IED group in which the IED can communicate with each other via GOOSE protocol, and if GOOSE Group ID is configured to “0”, GOOSE service is blocked in this IED. IEC61850 recommends a default priority value of 4 for GOOSE. Ethernet traffic that does not contain a priority tag has a default priority of 1. More details are specified in IEC61850 part 8-1. IEC61850 recommends that the Ether-type Application ID number be configured according to the GOOSE source. The RCS-974 series relays support IEC61850 Generic Object Oriented Substation Event (GOOSE) communication. All GOOSE messages contain IEC61850 data collected into a dataset. It is this dataset that is transferred using GOOSE message services. The GOOSE related dataset is configured in the CID file and it is recommended that the fixed GOOSE be used for implementations that require GOOSE data transfer between RCS-900 series relays. IEC61850 GOOSE messaging contains a number of configurable parameters, all of which must



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be correct to achieve the successful transfer of data. It is critical that the configured datasets at the transmission and reception devices are an exact match in terms of data structure, and that the GOOSE addresses and name strings match exactly. The general steps required for transmission configuration are: 1.



Configure the transmission dataset.



2.



Configure the GOOSE service settings.



3.



Configure the data.



The general steps required for reception configuration are: 1.



Configure the reception dataset.



2.



Configure the GOOSE service settings.



3.



Configure the data.



9.6.5 ACSI conformance 9.6.5.1 ACSI Basic Conformance Statement Services



Client



Server



RCS-974



Client-Server Roles B11



Server side (of Two-party Application-Association)



－



C1



Y



B12



Client side (of Two-party Application-Association)



C1



－



N



SCSMS Supported B21



SCSM: IEC 61850-8-1 used



N



N



Y



B22



SCSM: IEC 61850-9-1 used



N



N



N



B23



SCSM: IEC 61850-9-2 used



N



N



N



B24



SCSM: other



N



N



N



Generic Substation Event Model (GSE) B31



Publisher side



－



O



Y



B32



Subscriber side



O



－



Y



Transmission Of Sampled Value Model (SVC) B41



Publisher side



－



O



N



B42



Subscriber side



O



－



N



Where: C1: Shall be "M" if support for LOGICAL-DEVICE model has been declared O: Optional M: Mandatory Y:



Supported by RCS-900 series relays



N: Currently not supported by RCS-900 series relays



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9.6.5.2 ACSI Models Conformance Statement Services



Client



Server



RCS-974



M1



Logical device



C2



C2



Y



M2



Logical node



C3



C3



Y



M3



Data



C4



C4



Y



M4



Data set



C5



C5



Y



M5



Substitution



O



O



Y



M6



Setting group control



O



O



Y



M7



Buffered report control



O



O



Y



M7-1



sequence-number



Y



Y



Y



M7-2



report-time-stamp



Y



Y



Y



M7-3



reason-for-inclusion



Y



Y



Y



M7-4



data-set-name



Y



Y



Y



M7-5



data-reference



Y



Y



Y



M7-6



buffer-overflow



Y



Y



Y



M7-7



entryID



Y



Y



Y



M7-8



BufTm



N



N



N



M7-9



IntgPd



Y



Y



Y



M7-10



GI



Y



Y



Y



M8



Unbuffered report control



M



M



Y



M8-1



sequence-number



Y



Y



Y



M8-2



report-time-stamp



Y



Y



Y



M8-3



reason-for-inclusion



Y



Y



Y



M8-4



data-set-name



Y



Y



Y



M8-5



data-reference



Y



Y



Y



M8-6



BufTm



N



N



N



M8-7



IntgPd



N



Y



Y



M9



Log control



O



O



N



M9-1



IntgPd



N



N



N



M10



Log



O



O



N



M12



GOOSE



O



O



Y



M13



GSSE



O



O



N



M14



Multicast SVC



O



O



N



M15



Unicast SVC



O



O



N



M16



Time



M



M



Y



M17



File transfer



O



O



Y



Reporting



Logging



GSE



Where: C2: Shall be "M" if support for LOGICAL-NODE model has been declared 106



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C3: Shall be "M" if support for DATA model has been declared C4: Shall be "M" if support for DATA-SET, Substitution, Report, Log Control, or Time models has been declared C5: Shall be "M" if support for Report, GSE, or SMV models has been declared M: Mandatory Y:



Supported by RCS-900 series relays



N: Currently not supported by RCS-900 series relays 9.6.5.3 ACSI Services Conformance Statement Service



Server/Publisher



RCS-974



Server S1



ServerDirectory



M



Y



Application association S2



Associate



M



Y



S3



Abort



M



Y



S4



Release



M



Y



M



Y



Logical device S5



LogicalDeviceDirectory



Logical node S6



LogicalNodeDirectory



M



Y



S7



GetAllDataValues



M



Y



S8



GetDataValues



M



Y



S9



SetDataValues



M



Y



S10



GetDataDirectory



M



Y



S11



GetDataDefinition



M



Y



S12



GetDataSetValues



M



Y



S13



SetDataSetValues



O



S14



CreateDataSet



O



S15



DeleteDataSet



O



S16



GetDataSetDirectory



M



Y



M



Y



Data



Data set



Substitution S17



SetDataValues



Setting group control S18



SelectActiveSG



M/O



Y



S19



SelectEditSG



M/O



Y



S20



SetSGValuess



M/O



Y



S21



ConfirmEditSGValues



M/O



Y



S22



GetSGValues



M/O



Y



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Service S23



Server/Publisher GetSGCBValues



RCS-974



M/O



Y



Reporting Buffered report control block S24



Report



M



Y



S24-1



data-change



M



Y



S24-2



qchg-change



M



Y



S24-3



data-update



M



Y



S25



GetBRCBValues



M



Y



S26



SetBRCBValues



M



Y



Unbuffered report control block S27



Report



M



Y



S27-1



data-change



M



Y



S27-2



qchg-change



M



Y



S27-3



data-update



M



Y



S28



GetURCBValues



M



Y



S29



SetURCBValues



M



Y



Logging Log control block S30



GetLCBValues



O



S31



SetLCBValues



O



S32



QueryLogByTime



O



S33



QueryLogAfter



O



S34



GetLogStatusValues



O



Log



Generic substation event model (GSE) GOOSE control block S35



SendGOOSEMessage



M



Y



S36



GetGoReference



O



S37



GetGOOSEElementNumber



O



Y



S38



GetGoCBValues



M



Y



S39



SetGoCBValuess



M



Y



S51



Select



O



S52



SelectWithValue



M



Y



S53



Cancel



M



Y



S54



Operate



M



Y



S55



Command-Termination



O



Y



S56



TimeActivated-Operate



O



Control



File transfer S57



GetFile



M/O



Y



S58



SetFile



O



Y



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Service



Server/Publisher



S59



DeleteFile



S60



GetFileAttributeValues



RCS-974



O M/O



Y



M



Y



Time SNTP



9.6.6 Logical Nodes 9.6.6.1 Logical Nodes Table The RCS-974 relays support IEC61850 logical nodes as indicated in the following table. Note that the actual instantiation of each logical node is determined by the product order code. Nodes



RCS-974



L: System Logical Nodes LPHD: Physical device information



YES



LLN0: Logical node zero



YES



P: Logical Nodes For Protection Functions PDIF: Differential



－



PDIR: Direction comparison



－



PDIS: Distance



－



PDOP: Directional overpower



－



PDUP: Directional underpower



－



PFRC: Rate of change of frequency



－



PHAR: Harmonic restraint



－



PHIZ: Ground detector



－



PIOC: Instantaneous overcurrent



－



PMRI: Motor restart inhibition



－



PMSS: Motor starting time supervision



－



POPF: Over power factor



－



PPAM: Phase angle measuring



－



PSCH: Protection scheme



－



PSDE: Sensitive directional earth fault



－



PTEF: Transient earth fault



－



PTOC: Time overcurrent



YES



PTOF: Overfrequency



－



PTOV: Overvoltage



－



PTRC: Protection trip conditioning



YES



PTTR: Thermal overload



－



PTUC: Undercurrent



－



PTUV: Undervoltage



－



PUPF: Underpower factor



－



PTUF: Underfrequency



－



PVOC: Voltage controlled time overcurrent



－



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Nodes



RCS-974



PVPH: Volts per Hz



－



PZSU: Zero speed or underspeed



－



R: Logical Nodes For Protection Related Functions RDRE: Disturbance recorder function



YES



RADR: Disturbance recorder channel analogue



－



RBDR: Disturbance recorder channel binary



－



RDRS: Disturbance record handling



－



RBRF: Breaker failure



－



RDIR: Directional element



－



RFLO: Fault locator



－



RPSB: Power swing detection/blocking



－



RREC: Autoreclosing



－



RSYN: Synchronism-check or synchronizing



－



C: Logical Nodes For Control CALH: Alarm handling



－



CCGR: Cooling group control



－



CILO: Interlocking



－



CPOW: Point-on-wave switching



－



CSWI: Switch controller



－



G: Logical Nodes For Generic References GAPC: Generic automatic process control GGIO: Generic process I/O GSAL: Generic security application



－ YES －



I: Logical Nodes For Interfacing And Archiving IARC: Archiving



－



IHMI: Human machine interface



－



ITCI: Telecontrol interface



－



ITMI: Telemonitoring interface



－



A: Logical Nodes For Automatic Control ANCR: Neutral current regulator



－



ARCO: Reactive power control



－



ATCC: Automatic tap changer controller



－



AVCO: Voltage control



－



M: Logical Nodes For Metering And Measurement MDIF: Differential measurements



－



MHAI: Harmonics or interharmonics



－



MHAN: Non phase related harmonics or interharmonic



－



MMTR: Metering



－



MMXN: Non phase related measurement



－



MMXU: Measurement MSQI: Sequence and imbalance



110



YES －



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Nodes MSTA: Metering statistics



RCS-974 －



S: Logical Nodes For Sensors And Monitoring SARC: Monitoring and diagnostics for arcs



－



SIMG: Insulation medium supervision (gas)



－



SIML: Insulation medium supervision (liquid)



－



SPDC: Monitoring and diagnostics for partial discharges



－



X: Logical Nodes For Switchgear TCTR: Current transformer



－



TVTR: Voltage transformer



－



Y: Logical Nodes For Power Transformers YEFN: Earth fault neutralizer (Peterson coil)



－



YLTC: Tap changer



－



YPSH: Power shunt



－



YPTR: Power transformer



－



Z: Logical Nodes For Further Power System Equipment ZAXN: Auxiliary network



－



ZBAT: Battery



－



ZBSH: Bushing



－



ZCAB: Power cable



－



ZCAP: Capacitor bank



－



ZCON: Converter



－



ZGEN: Generator



－



ZGIL: Gas insulated line



－



ZLIN: Power overhead line



－



ZMOT: Motor



－



ZREA: Reactor



－



ZRRC: Rotating reactive component



－



ZSAR: Surge arrestor



－



ZTCF: Thyristor controlled frequency converter



－



ZTRC: Thyristor controlled reactive component



－



1)



9.7 Front EIA(RS)232 Interface Communication The front communication port is provided by a DB9 female D-type connector located under the small hinged cover on the front panel. It provides RS232 serial data communication and is intended for use with a PC locally to the relay (up to 15m distance). This port supports the courier communication protocol only. Courier is the communication language developed by NR (NR) to allow communication with its range of protection relays. The front port is particularly designed for use with relays settings program RCSPC which is a Windows based software package.



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The pin connections of relay’s DB9 front prot are as follows: Pin No.2 Tx Transmit data Pin No.3 Rx Receive data Pin No.5 common None of the other pins are connected in the relays. The relays should be connected to the serial port of a PC, usually called as COM1 or COM2. The serial port pin connections, which is DB9 male, is as below (if in doubt check you PC manual): Pin No.2 Rx Transmit data Pin No.3 Tx Receive data Pin No.5 common For successful data communication, the Tx pin on the relays must be connected to the Rx pin on the PC, and Rx pin on the relay must be connected to Tx pin on the PC as shown in Figure 9.7-1. NOTE: The baud rate for this port is fixed at 9600 bps.



Figure 9.7-1



Front panel RS232 port communication connection



9.8 Communication with Printer When communicating locally with a printer using the rear series port, a special connection line is necessary which is provided by manufacture of the equipment. There are two parameters need to be set in RCS-974 for communication with printer, [Printer_Baud] and [En_Auto_Print], the former decides the communication speed and the later decides the printer’s activating way. Please refer to the section “Equipment Settings” for details.



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9.9 Communication with External Time Synchronization Source The clock function (Calendar clock) is used for time-tagging for the following purposes: „



Event records



„



Disturbance records/Fault records



„



Metering



„



Automatic supervision



„



Display of the system quantities in LCD



„



Display of the fault records in LCD



„



Display of the automatic monitoring results in LCD



When the relays are connected to the GPS clock, all the relay clocks are synchronized with the external clock. Please refer to the section “Time Synchronization” for details.



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Chapter 10 Commissioning and Installation 10.1 Introduction The chapter contains instructions on how to install, commission and maintenance the protection equipment. It can also be used as a reference if a periodic test is performed. The chapter covers procedures for mechanical and electrical installation, energizing and checking of external circuitry, setting and configuration as well as verifying settings and performing a directionality test. The chapter contains the following information: 1)



The “Safety information” presents warning and note signs, which the user should draw attention to.



2)



The “Overview” gives an overview over the major task when installing and commissioning the protection equipment.



3)



The “Unpacking and checking the protection equipment” contains instructions on how to receive the protection equipment.



4)



The “Installing the protection equipment” contains instructions on how to install the protection equipment.



5)



The “Checking the external circuitry” contains instructions on how to check that the protection equipment is properly connected to the protection system.



6)



The “Energizing the protection equipment” contains instructions on how to start-up the protection equipment.



7)



The “Setting the protection equipment” contains instructions on how to download settings and configuration to the protection equipment.



8)



The “Establishing connection and verifying communication” contains instructions on how to verify the communication.



9)



The “Verifying settings by secondary injection” contains instructions on how to verify that each included function operates correctly according to the set value.



10) The “Final check” contains instructions on how to do final check to make the equipment ready for being put into service. The chapter is addressing the installation, commissioning and maintenance personnel responsible for taking the protection into normal service and out of service. The installation personnel must have a basic knowledge in handling electronic equipment. The commissioning and maintenance personnel must be well experienced in using protection equipment, test equipment, protection functions and the configured functional logics in the protection.



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10.2 Safety Information This section contains safety information. Warning signs are presented which attend the user to be careful during certain operations in order to avoid human injuries or damage to equipment. „



Warning signs WARNING！



„



„



Strictly follow the company and country safety regulations. Working in a high voltage environment requires serious approach to avoid human injuries and damage to equipment.



„



Do not touch circuitry during operation. Potentially lethal voltages and currents are present.



„



Always avoid touching the circuitry when the cover is removed. The product contains electronic circuitries which can be damaged if exposed to static electricity (ESD). The electronic circuitries also contain high voltage which is lethal to humans.



„



Always use suitable isolated test pins when measuring signals in open circuitry. Potentially lethal voltages and currents are present.



„



Never connect or disconnect a wire and/or a connector to or from a protection equipment during normal operation. Hazardous voltages and currents are present that may be lethal. Operation may be disrupted and protection equipment and measuring circuitry may be damaged.



„



Always connect the protection equipment to protective ground, regardless of the operating conditions. This also applies to special occasions such as bench testing, demonstrations and off-site configuration. Operating the protection equipment without proper grounding may damage both terminal and measuring circuitry, and may cause injuries in case of an accident.



„



Never disconnect a secondary connection of current transformer circuit without short-circuiting the transformer’s secondary winding. Operating a current transformer with the secondary winding open will cause a massive potential build-up that may damage the transformer and may cause injuries to humans.



„



Never unmount the front or back cover from a powered equipment or from a protection equipment connected to powered circuitry. Potentially lethal voltages and currents are present.



Caution signs CAUTION！ „



116



Always transport modules using certified conductive bags. Always handle modules using NR ELECTRIC CO., LTD



Chapter 10 Commissioning and Installation



a conductive wrist strap connected to protective ground and on a suitable antistatic surface. Electrostatic discharge (ESD) may cause damage to the module.



„



„



Do not connect live wires to the protection equipment. Internal circuitry may be damaged.



„



Always use a conductive wrist strap connected to protective ground when replacing modules. Electrostatic discharge (ESD) may damage the module and protection equipment circuitry.



„



Take care to avoid electrical shock if accessing wiring and connection protection equipment when installing and commissioning.



Note signs NOTE！ „



Changing the active setting group will inevitably change the protection equipment’s operation. Be careful and check regulations before making the change.



„



The protection assembly is designed for a maximum continuous current of four times rated value.



„



Activating the other setting group without proper configuration may seriously affect the protection equipment’s operation.



10.3 Overview The settings for each function must be calculated before the commissioning task can start. A configuration, made in the configuration and programming tool, must also be available if the protection equipment does not have a factory configuration downloaded. The protection equipment is unpacked and visually checked. It is preferably mounted in a cubicle. The connection to the protection system has to be checked in order to verify that the installation was successful. The installation and commissioning task starts with configuring the digital communication modules, if included. The protection equipment can then be configured and set, which means that settings and a configuration has to be applied if the protection equipment does not have a factory configuration downloaded. Then the operation of each included function according to applied settings has to be verified by secondary injection. A complete check of the configuration can then be made. A conformity test of the secondary system has also to be done. When the primary system has been energized a directionality check should be made.



10.4 Unpacking and Checking The Protection Equipment Procedure 1)



Remove the transport casing.



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Chapter 10 Commissioning and Installation



2)



Visually inspect the protection equipment. „



„



„



Carefully examine the protection panel, protection equipment inside and other parts inside to see that no physical damage has occurred since installation. The rating information should be given for the protection equipment. The rating information of other auxiliary protections should be checked to ensure it is correct for the particular installation.



Panel wiring: Check the conducting wire used in the panel to assure that their cross section meet the requirement. Carefully examine the wiring to see that they are no connection failure exists. Label: Check all the isolator links, terminal blocks, ferrules, indicators, switches and push buttons to make sure that their labels meet the requirements of this project. Equipment plug-in modules: Check each plug-in module of the equipments on the panel to make sure that they are well installed into the equipment without any screw loosened. Earthing cable: Check whether the earthing cable from the panel terminal block is safely screwed to the panel steel sheet. Switch, keypad, isolator links and push button: Check whether all the switches, equipment keypad, isolator links and push buttons work normally and smoothly. 3)



Check that all items are included in accordance with the delivery documents.



The user is requested to check that all software functions are included according to the delivery documents after the terminal has been energized. 4)



Check for transport damages.



These product checks cover all aspects of the protection, which should be checked to ensure that the protection not only has not been physically damaged prior to commissioning but also functions correctly and all input quantity measurements are within the stated tolerances.



10.5 Installing the Protection Equipment 10.5.1 Overview The mechanical and electrical environmental conditions at the installation site must be within permissible range according to the technical data of the protection equipment. Dusty, damp places, places liable to rapid temperature variations, powerful vibrations and shocks, surge 118



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Chapter 10 Commissioning and Installation



voltages of high amplitude and fast rise time, strong induced magnetic fields or similar extreme conditions should be avoided. Please refer to Chapter 2 for details. Sufficient space must be available in front of and at rear of the protection panel to allow access for maintenance and future modifications. Flush mounted protection equipment should be mounted so that equipment modules can be added and replaced without excessive demounting.



10.5.2 Dimensions The equipment adopts IEC standard chassis and is rack with modular structure. It uses an integral faceplate and plug terminal block on backboard for external connections. RCS-974 is IEC 4U high and 19” wide. Following two figures shows its dimensions and the panel cut-out. 482.6 291



465.0



177.0 101.6



NANJING NARI-RELAYS ELECTRIC CO.,LTD.



MECH 9



HEALTH ALARM TRIP1



MECH 10



TRIP2



MECH 11



MECH 1



MECH 12



MECH 2



MECH 13



MECH 3



MECH 14



MECH 4



MECH 15 MECH 16



GR P



MECH 8



RCS-974 TRANSFORMER AUXILIARY RELAY



ESC



MECH 7



ENT



MECH 5 MECH 6



TARGET RESET



Equipment Dimensions



179.0



101.6



Figure 10.5-1



Figure 10.5-2



Panel cut-out dimensions



10.5.3 Grounding Guidelines Switching operations in HV installations generate transient over voltages on control signal cables. There is also a background of electromagnetic RF fields in electrical installations that can induce spurious currents in the devices themselves or the leads connected to them. All these influences can influence the operation of electronic apparatus. On the other hand, electronic apparatus can transmit interference that can disrupt the operation of other apparatus.



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In order to minimize these influences as far as possible, certain standards have to be observed with respect to grounding, wiring and screening. NOTE:



All these precautions can only be effective if the station ground is of good quality.



10.5.4 Cubicle Grounding The cubicle must be designed and fitted out such that the impedance for RF interference of the ground path from the electronic device to the cubicle ground terminal is as low as possible. Metal accessories such as side plates, blanking plates etc., must be effectively connected surface-to-surface to the grounded frame to ensure a low-impedance path to ground for RF interference. The contact surfaces must not only conduct well, they must also be non-corroding. NOTE: If the above conditions are not fulfilled, there is a possibility of the cubicle or parts of it forming a resonant circuit at certain frequencies that would amplify the transmission of interference by the devices installed and also reduce their immunity to induced interference. Movable parts of the cubicle such as doors (front and back) or hinged equipment frames must be effectively grounded to the frame by three braided copper strips (refer to Figure 10.5-3). The metal parts of the cubicle housing and the ground rail are interconnected electrically conducting and corrosion proof. The contact surfaces shall be as large as possible. NOTE: For metallic connections please observe the voltage difference of both materials according to the electrochemical code. The cubicle ground rail must be effectively connected to the station ground rail by a grounding strip (braided copper).



Figure 10.5-3 Cubicle grounding system



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10.5.5 Ground Connection on the Device There is a ground terminal on the rear panel (refer to Figure 10.5-4), and the ground braided copper strip can be connected with it. Take care that the grounding strip is always as short as possible. The main thing is that the device is only grounded at one point. Grounding loops from unit to unit are not allowed. There are some ground terminals on some connectors of the equipments, and the sign is “GND”. All the ground terminals are connected in the cabinet of this equipment. So, the ground terminal on the rear panel (refer to Figure 10.5-4) is the only ground terminal of this device.



Figure 10.5-4 Ground terminal



10.5.6 Grounding Strips and Their Installation High frequency currents are produced by interference in the ground connections and because of skin effect at these frequencies, only the surface region of the grounding strips is of consequence. The grounding strips must therefore be of (preferably tinned) braided copper and not round copper conductors, as the cross-section of round copper would have to be too large. Data of braided copper strip: threaded M4, 4.0mm2. Proper terminations must be fitted to both ends (press/pinch fit and tinned) with a hole for bolting them firmly to the items to be connected. The surfaces to which the grounding strips are bolted must be electrically conducting and non-corroding. The following figure shows the ground strip and termination.



Figure 10.5-5 Ground strip and termination



10.5.7 Making the Electrical Connections Always make sure established guidelines for this type of terminal is followed during installation. When necessary, use screened twisted-pair cables to minimize susceptibility. Otherwise, use any kind of regular nonscreened tinned RK cable or equivalent. NR ELECTRIC CO., LTD



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When using screened cabling always use 360° full screen cable bushing to ensure screen coupling. Ensure that all signals of the single circuit are in the same single cable. Avoid mixing current and voltage measuring signals in the same cable. Also use separate cables for control and measuring circuits. 1)



Connecting the CT circuits:



Heavy-duty terminal block, M4 threaded terminal ends. 2)



Connecting the auxiliary power:



Auxiliary power cords can be directly screw fixed on the rear panel of DC board. Refer to section 6.2.1. 3)



Input/output signal connectors:



Welding terminals. Those devices are supplied with sufficient M4 screws for making connections to the rear mounted terminal blocks using ring terminals, with a recommended maximum of two ring terminals per terminal. To meet the insulation requirements of the terminal block, for the sake of safety, an insulating sleeve should be fitted over the ring terminal after crimping. The wire used for all connections to the welding terminal blocks and heavy duty terminal blocks, except the EIA RS-485 port, should have a minimum voltage rating of 300Vrms. It is recommended that the auxiliary power circuit wiring should be protected by using a 16A high rupture capacity (HRC) fuse of type NIT or TIA. For safety reasons, current transformer circuits must never be open. 4)



Connecting to protective ground:



Connect the unit to the grounding bar of the cubicle with green/yellow conductor; connected to the protective Earthing terminal at the back of the PWR board. Refer to section 6.2.1. Attend that the earth wire must be as short as possible. All cautions have to be taken to ensure the best electrical conductivity, particularly the contact quality, stainless conductor. The impedance between the equipment Earthing terminal and the Earth must be less than 20mΩ under 12Volt, 50Hz. What matters is that the device has to be only grounded at one point. Loop grounding from unit to unit is not allowed. 5)



Installing the optic fibres



Connectors are generally color coded; connect blue or dark grey cable connectors to blue or dark grey (receive) back-side connectors. Connect black or grey cable connectors to black or grey (transmit) back-side connectors. Fiber optical cables are sensitive to handling. Do not bend too sharply. The minimum curvature radius is 15 cm for plastic fibers and 25 cm for glass fibers. If cable straps are used, apply with loose fit. NOTE: Always hold the connector, never the cable, when connecting or disconnecting



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optical fibres. Do not twist, pull or bend the fibre. Invisible damage may increase fibre damping thus making communication impossible. 6)



Installing the RS-485 serial port communication cables:



When using galvanic connection between the synchronizer equipment and communication equipment or point-to-point galvanic connection between two equipments it is essential that the cable installation is carefully done. This is true regardless of type of module used, only the possible length of the cable differs. The factors that must be taken into account is the susceptibility for noise disturbance, due to that the levels of the communication signal are very low. For a best result, a cable with twisted pairs with screen should be used. RS-485 serial communication interface, a termination 120-ohm resistor has to be connected at each extremity of the bus. Refer to Chapter 9.



10.6 Check the External Circuitry The user must check the installation, which includes verifying that the relay is connected to the other parts of the protection system. This is done with the relay and all connected circuits de-energized. 1)



Checking the CT circuits



Check that the wiring is in strict accordance with the supplied wiring diagram. Test the circuitry. The following tests are recommended: „



Polarity check



„



CT circuit current measurement (primary injection test)



„



Grounding check



The polarity check verifies the integrity of the circuits and the phase relationship. The check should be performed as close as possible to the relay. The primary injection test verifies the CT ration and the wiring all the way through from the primary system to the relay. Injection must be performed for each phase-to-neutral circuit and each phase-to-phase pair. In each case currents in all phases and the neutral line are measured. 2)



Checking the power supply



Check that the value of the auxiliary supply voltage remains with the permissible range under all operating conditions. Check that the polarity is correct according to the instruction manual on the rear plate of DC board. Refer to section 6.2.1. 3)



Checking binary input circuits



Preferably, disconnect the binary input connector form the binary input cards. Check all connected signals so that both input level and polarity are in accordance with the relay’s specifications.



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NOTE The binary inputs may be energized from an external dc auxiliary supply (e.g. the station battery) in some installations. Check that this is not the case before connecting the field voltage otherwise damage to the protection may result. The status of each binary input can be viewed using either RCSPC software installed in a portable PC or by checking the front man-machine interface LCD. When each binary input is energized the display will change to indicate the new state of the inputs. 4)



Checking binary output circuits



Preferably, disconnect the binary output connector form the binary output cards. Check all connected signals so that both load and polarity are in accordance with the relay’s specifications.



10.7 Energizing the Protection Equipment Before the procedures in this section can be carried out the connection to external circuitry must have been checked which ensures that the installation was made correctly. The user must energies the power supply to the relay to start it up. This could be done in a numerous of ways, from energizing a whole cubicle to energizing a single relay. The user should reconfigure the relay settings. The relay time must be set. The self-supervision function should also be checked to verify that the relay unit operates properly. The user could also check the software version, the relay’s serial number, the installed modules, and their ordering number to ensure that the relay is according to delivery and ordering specifications. 1)



Checking front panel LCD display



Connect the relay to DC power supply correctly and turn the relay on. Check program version and forming time displayed in command menu to ensure that are corresponding to what ordered. 2)



Setting the date and time of the protective device



If the time and date is not being maintained by substation automation system, the date and time should be set manually. Set the date and time to the correct local time and date using menu item “CLOCK”. Refer to the section “Adjust the Clock” for detailed procedures. In the event of the auxiliary supply failing, with a battery fitted on CPU board, the time and date will be maintained. Therefore when the auxiliary supply is restored the time and date will be correct and not need to set again. To test this, remove the auxiliary supply from the relay for approximately 30s. After being re-energized, the time and date should be correct. 3)



Checking light emitting diodes (LEDs)



On power up, the green LED “HEALTHY” should have illuminated and stayed on indicating that



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the protective device is healthy. The relay has latched signal relays which remember the state of the trip, auto-reclose when the relay was last energized from an auxiliary supply. Therefore these indicators may also illuminate when the auxiliary supply is applied. If any of these LEDs are on then they should be reset before proceeding with further testing. If the LED successfully reset, the LED goes out. There is no testing required for that that LED because it is known to be operational. It is likely that alarms related to voltage transformer supervision will not reset at this stage.



10.8 Setting the Protection Equipment The customer specific values for each setting parameter have to be available. Each function included in the relay has several setting parameters which has to be set in order to make the relay behave as intended. A default value is provided for each parameter from factory. All settings can be: „



„



Download from a PC or laptop with RCSPC software or remotely by SCADA. Front port communication has to be established before the settings can be downloaded. Input manually through the local HMI (refer to section “Input Operation through Keypad”).



To change settings through the local HMI need a password which is “+”, “◄”, “▲” and “-” keyboard on the front panel. Unless previously agreed to the contrary, the customer will be responsible for determining the application-specific settings to be applied to the protection and for testing of any scheme logic applied by external wiring and/or configuration of the protection’s internal programmable scheme logic.



10.9 Establishing Connection and Verifying Communication This test should only be performed where the protection is to be accessed from a remote location and will vary depending on the communications standard being adopted. It is not the intention of the test to verify the operation of the complete system from the relay to the remote location, just the protection’s rear communications port and any protocol converter necessary.



10.10 Verifying Settings by Secondary Injection Required tools for testing of a protective device: Minimum equipment required: „



Multifunctional dynamic current and voltage injection test set with interval timer.



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Multimeter with suitable AC current range and AC/DC voltage ranges of 0-440V and 0-250V respectively.



„



Continuity tester (if not included in the multimeter).



„



Phase angle meter.



„



Phase rotation meter. NOTE: Modern test set may contain many of the above features in one unit.



Optional equipment: „



„



An electronic or brushless insulation tester with a DC output not exceeding 500 V (for insulation resistance test when required). A portable PC, with appropriate software (this enables the rear communications port to be tested, if this is to be used, and will also save considerable time during commissioning).



„



EIA RS-485 to EIA RS-232 converter (if EIA RS-485 IEC60870-5-103 port is being tested).



„



An EPSON® 300K printer.



„



RCS-9000 serials dedicated protection tester TEST or HELP-90.



At the same time, the calculated settings, substation configuration diagram, the protective device diagram and the instruction manual is essential to test the protective device. The equipment has to be set before the testing can start. Only the functions that are used should be tested. The response from a test can be viewed in different ways: „



Binary output signals



„



Service values in the local HMI



„



A PC with RCSPC software or SCADA or master station



All used setting groups should be tested. The user can release the functions to be tested and prevent other functions from operation by setting the corresponding parameters. The user could also energize the binary input [BI_BlkComm] to disable communication function to ensure that no events are reported to remote station during the test. The setting checks ensure that all of the application-specific protection settings (i.e. both the protection’s function and programmable scheme logic settings), for the particular installation, have been correctly applied to the protection.



10.10.1 Insulation Test (if required) Insulation resistance tests are only necessary during commissioning if it is required for them to be done and they have not been performed during installation. Isolate all wiring from the earth and test the isolation with an electronic or brushless insulation 126



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tester at a DC voltage not exceeding 500V, The circuits need to be tested should include: „



Voltage transformer circuits



„



DC power supply



„



Optic-isolated control inputs



„



Output contacts



„



Communication ports



The insulation resistance should be greater than 100MΩ at 500V.



10.10.2 Current Measurement Check This test verifies that the accuracy of voltage measurement is within the acceptable tolerances. Checking its magnitude using a multimeter. The corresponding reading either in the protection’s menus “DSP METERING”, “CPU METERING” or a portable computer connected to the front communication port with software RCSPC. The measurement accuracy of the protection is ±5%. However, an additional allowance must be made for the accuracy of the test equipment being used. NOTE: The closing circuit should remain isolated during these checks to prevent accidental operation of the associated circuit breaker. Group No.



Item



Input Value



Measurement (on LCD) Angle



Value



Angle



Ia_1 The first group of CT



Ib_1 Ic_1 3I0_1 I2_1 Ia_2



The second group of CT



Ib_2 Ic_2 3I0_2 I2_2



10.10.3 Testing the Binary Inputs This test checks that all the binary inputs on the equipment are functioning correctly. The binary inputs should be energized one at a time, see external connection diagrams for terminal numbers. Ensure that the voltage applied on the binary input must be within the operating range. The status of each binary input can be viewed using menu item “BI STATE”. Sign “1” denotes an energized input and sign “0” denotes a de-energized input. NR ELECTRIC CO., LTD



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Binary Inputs testing checkout Terminal No.



Signal Name



BI Status on LCD



Correct?



Test method: To unplug all the terminals sockets of this protective device, and do the Insulation resistance test for each circuit above with an electronic or brushless insulation tester. On completion of the insulation resistance tests, ensure all external wiring is correctly reconnected to the protection.



10.10.4 Mechanical Protection 10.10.4.1 MR for Warning Energize certain binary input of [BI_MRn], n = 10, 11,…16. Related LED labeled as [MECHn] is lit on and relevant normal open contacts of signal relays are closed. Also, check the [ALM REPORT]. 10.10.4.2 Tripping Directly Energize certain binary input of [BI_MRn], n = 5, 6, 7, 8, 9. Related LED labeled as [MECHn] is lit on and relevant normal open contacts of signal relays and output relays are closed. Also, check the [ALM REPORT]. 10.10.4.3 Tripping with Time Delay Energize binary input [En_Dly_MR], and certain binary input of [BI_MRn] (n = 1, 2 and 3) and then related LED labeled as [MECHn] (n=1,2 and 3) is lit at once. LED [TRIP 2] is also lit with time delay and relevant normal open contacts of signal relays and output relays are closed. Also, check the [TRP REPORT]. When Check MR1 protection, please check MR1 operates during two situations with logic setting [En_FixDly_MR1] is set as “1” and “0” respectively.



10.10.5 Pole Disagreement Protection Consider to release used start criteria. Refer to 3.3. If the PD is activated, LED labeled [TRIP1] is lit on and several relevant normal open contacts of signal relays and output relay are closed. 10.10.5.1 Pole Disagreement Protection Delay 1 Check the PD1 in the following ways: z



128



Set [En_PD1] as “1” and energize binary input [EBI_PD]. Then energize binary input [BI_PD_CB] without injecting any current. Check that whether the PD1 is activated after time delay [t_PD1].



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z



Set [En_PD1] and [En_NegOC_PD] as “1”, and energize binary input [EBI_PD]. Then energize [BI_PD_CB] and inject current via terminals on No.2 AC board to make I2_CTn>[I_NegOC_PD_CTn], where n represents the CT group number. Check that whether the PD1 is activated after time delay [t_PD1].



z



Set [En_NegOC_PD] as “0”, [En_PD1] and [En_ROC_PD] as “1”, and energize binary input [EBI_PD]. Then energize [BI_PD_CB] and inject current via terminals on No.2 AC board to make 3I0_CTn>[I_ROC_PD_CTn], where n represents the CT group number. Check that whether the PD1 is activated after time delay [t_PD1].



z



Please ensure the time of keep injecting current should be longer than the time delay [t_PD1].



10.10.5.2 Pole Disagreement Protection Delay 2 Since PD2 can be blocked by an external binary input [BI_ExtCtrlPD2], firstly, set [En_ExtCtrlPD2] as “0” to make PD2 out of this external control. After the accomplishment of the following steps, set [En_ExtCtrlPD2] as “1”, choose one of the following three items of the follow ways and do it again. Check that whether the PD2 is activated after a time delay [t_PD2]. Check the PD2 in the following ways: z



Set [En_NegOC_PD], [En_ROC_PD] and [En_OC_PD2] as “0”, [En_PD2] as “1”, and energize binary input [EBI_PD]. Then energize [BI_PD_CB] without injecting any current. Check that whether the PD2 is activated after time delay [t_PD2].



z



Set [En_ROC_PD] and [En_OC_PD2] as “0”, [En_PD2] and [En_NegOC_PD] as “1”, and energize binary input [EBI_PD]. Then energize [BI_PD_CB] and inject current via terminals on No.2 AC board to make I2_CTn>[I_NegOC_PD_CTn], where n represents the CT group number. Check that whether the PD2 is activated after time delay [t_PD2].



z



Set [En_OC_PD2] and [En_NegOC_PD] as “0”, [En_PD2] and [En_ROC_PD] as “1”, and energize binary input [EBI_PD]. Then energize [BI_PD_CB] and inject current via terminals on No.2 AC board to make 3I0_CTn>[I_ROC_PD_CTn], where n represents the CT group number. Check that whether the PD2 is activated after time delay [t_PD2].



z



Set [En_ROC_PD] and [En_NegOC_PD] as “0”, [En_PD2] and [En_OC_PD2] as “1”, enable the hard switch link [EBI_PD], energize [BI_PD_CB] and inject current via terminals on No.2 AC board to make Imax_CT1>[I_OC_BFI_CT1] ( maximum value of three phase current greater than [I_OC_BFI_CT1]). Check that whether the PD2 is activated after time delay [t_PD2].



z



Please ensure the time of keep injecting current should be longer than the time delay [t_PD2].



Please note three current control elements mentioned above are “OR” relation to release blocking of pole disagreement protection delay 2. Binary input [BI_ExtCtrlPD2] is independent blocking criterion to block PD2.



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10.10.6 Breaker Failure Initiation Consider to release used start criteria. Refer to 3.4. The breaker failure initiation should be tested in cooperation with some other relays, and in particular with external CBF protection relay. Since BFI can be blocked by an external binary input [BI_PD_CB], [BI_52a] and [BI_ExTCtrlBFI], firstly, set [En_PD_Ctrl_BFI], [En_52aCtrlBFI] and [En_ExTCtrlBFI] as “0” to make BFI out of these external controls. After the accomplishment of the following steps, set [En_PD_Ctrl_BFI], [En_52aCtrlBFI] or [En_ExTCtrlBFI] as “1” respectively, corresponding energize and de-energize [BI_PD_CB], [BI_52a] or [BI_ExTCtrlBFI], choose one of the last three items of the follow ways and do it again. Check that whether the BFI is activated after time delay [t_BFI2]. Set [En_BFI] as “1”, check the BFI2 in the following ways: z



Set [En_ROC_BFI] and [En_NegOC_BFI] as “0”, and inject current via terminals on No.2 AC board to make Imax_CT1>[I_OC_BFI_CT1] ( maximum value of three phase current greater than [I_OC_BFI_CT1]). Check that whether the BFI is activated after time delay [t_BFI1] or [t_BFI2].



z



Set [En_ROC_BFI] as “0”, [En_NegOC_BFI] as “1”, and inject current via terminals on No.2 AC board to make I2_CTn>[I_NegOC_BFI_CTn], where n represents the CT group number. Check that whether the BFI is activated after time delay [t_BFI1] or [t_BF2].



z



Set [En_NegOC_BFI] as “0”, [En_ROC_BFI] as “1”, inject current via terminals on No.2 AC board to make 3I0_CTn>[I_ROC_BFI_CTn], where n represents the CT group number. Check that whether the BFI is activated after time delay [t_BFI1] or [t_BFI2].



z



Please ensure the time of keep injecting current should be longer than the time delay [t_BFP1] or [t_BFP2].



Please note three current elements mentioned above are “OR” relation to pick up breaker failure initiation. Binary inputs [BI_PD_CB], [BI_52a] and [BI_ExTCtrlBFI] are “AND” relation to release blocking of breaker failure protection.



10.10.7 Secondary Circuit Abnormality and Failure 10.10.7.1 CT Circuit Failure Slowly inject a three unbalanced current to make the negative current of CT1 or CT 2 greater than 0.06In (In is rated secondary current), 10s later the equipment will generate a CT exception alarm. The LED “ALARM” will be extinguished automatically 20s later after the three-phase current returns to normal state. 10.10.7.2 Contact of Pole Disagreement Position Abnormality When binary input [BI_PD_CB] keeps being energized for 10s, LED “ALARM” is lit on with report [Alm_BI_ExTrp] is issued on LCD. The LED “ALARM” will be extinguished automatically 20s later after the binary input is de-energized.



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10.10.7.3 Contact of External Tripping Abnormality When any one of binary inputs [BI_ExTCtrlBFI] and [BI_ExTCtrlPD2] keeps being energized for 10s, LED “ALARM” is lit on with report [Alm_BI_ExTrp] is issued on LCD. The LED “ALARM” will be extinguished automatically 20s later after binary input [BI_ExTCtrlBFI] or [BI_ExtCtrlPD2] is de-energized.



10.10.8 Print Fault Report In order to acquire the details of protection operation, it is convenient to print the fault report of protection device. The printing work can be easily finished when operator presses the print button on panel of protection device to energize binary input [BI_Print] or operate control menu. What should be noticed is that only the latest fault report can be printed if operator presses the print button. A complete fault report includes the content shown as follows. 1) Trip event report 2) Binary input when protection devices start 3) Self-check and the transition of binary input in the process of devices start 4) Fault wave forms compatible with COMTRADE 5) The setting value when the protection device trips



10.10.9 Final Check After the above tests are completed, remove all test or temporary shorting leads, etc. If it has been necessary to disconnect any of the external wiring from the protection in order to perform the wiring verification tests, it should be ensured that all connections are replaced in accordance with the relevant external connection or scheme diagram. Ensure that the protection has been restored to service. If the protection is in a new installation or the circuit breaker has just been maintained, the circuit breaker maintenance and current counters should be zero. If a test block is installed, remove the test plug and replace the cover so that the protection is put into service. Ensure that all event records, fault records, disturbance records and alarms have been cleared and LED’s has been reset before leaving the protection.



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Chapter 11 Maintenance



Chapter 11 Maintenance NR numerical relay RCS-974 is designed to require no special maintenance. All measurement and signal processing circuit are fully solid state. All input modules are also fully solid state. The output relays are hermetically sealed. Since the device is almost completely self-monitored, from the measuring inputs to the output relays, hardware and software defects are automatically detected and reported. The self-monitoring ensures the high availability of the device and generally allows for a corrective rather than preventive maintenance strategy. Therefore, maintenance checks in short intervals are not required. Operation of the device is automatically blocked when a hardware failure is detected. If a problem is detected in the external measuring circuits, the device normally only provides alarm messages.



11.1 Appearance Check The relay case should be clean without any dust stratification. Case cover should be sealed well. No component has any mechanical damage and distortion, and they should be firmly fixed in the case. Relay terminals should be in good condition. The keys on the front panel with very good feeling can be operated flexibly. It is only allowed to plug or withdraw relay board when the supply is reliably switched off. Never allow the CT secondary circuit connected to this equipment to be opened while the primary system is live when withdrawing an AC module. Never try to insert or withdraw the relay board when it is unnecessary. Check weld spots on PCB whether they are well soldered without any rosin joint. All dual inline components must be well plugged.



11.2 Failure Tracing and Repair Failures will be detected by automatic supervision or regular testing. When a failure is detected by supervision, a remote alarm is issued and the failure is indicated on the front panel with LED indicators and LCD display. It is also recorded in the event record. Failures detected by supervision are traced by checking the “ALM REPORT” screen on the LCD. When a failure is detected during regular testing, confirm the following: „



Test circuit connections are correct



„



Modules are securely inserted in position



„



Correct DC power voltage is applied



„



Correct AC inputs are applied



„



Test procedures comply with those stated in the manual



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11.3 Replace Failed Modules If the failure is identified to be in the relay module and the user has spare modules, the user can recover the protection by replacing the failed modules. Repair at the site should be limited to module replacement. Maintenance at the component level is not recommended. Check that the replacement module has an identical module name (AI, PWR, CPU, SIG, BI, BO, etc.) and hardware type-form as the removed module. Furthermore, the CPU module replaced should have the same software version. In addition, the AI module, PWR module, BI module, IO module and RLY module replaced should have the same ratings. The module name is indicated on the top front of the module. The software version is indicated in LCD menu “VERSION”. CAUTION: When handling a module, take anti-static measures such as wearing an earthed wrist band and placing modules on an earthed conductive mat. Otherwise, many of the electronic components could suffer damage. After replacing the CPU module, check the settings. 1)



Replacing a module



„



Switch off the DC power supply



„



Disconnect the trip outputs



„



Short circuit all AC current inputs and disconnect all AC voltage inputs



„



Unscrew the module. WARNING: Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It takes approximately 30 seconds for the voltage to discharge.



2)



Replacing the Human Machine Interface Module (front panel)



„



Open the relay front panel



„



Unplug the ribbon cable on the front panel by pushing the catch outside.



„



Detach the HMI module from the relay



„



Attach the replacement module in the reverse procedure.



3)



Replacing the AI, PWR, CPU, BI, IO, BO module



„



Unscrew the module connector



„



Unplug the connector from the target module.



„



Unscrew the module.



„



Pull out the module



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Inset the replacement module in the reverser procedure.



„



After replacing the CPU module, input the application-specific setting values again. WARNING: Units and modules may only be replaced while the supply is switched off and only by appropriately trained and qualified personnel. Strictly observe the basic precautions to guard against electrostatic discharge. WARNING: When handling a module, take anti-static measures such as wearing an earthed wrist band and placing modules on an earthed conductive mat. Otherwise, many of the electronic components could suffer damage. After replacing the CPU module, check the settings. DANGER: After replacing modules, be sure to check that the same configuration is set as before the replacement. If this is not the case, there is a danger of the unintended operation of switchgear taking place or of protections not functioning correctly. Persons may also be put in danger.



11.4 Replace Button Battery When the voltage of button Battery on CPU board is below 2.5 volts (nominal voltage is 3 volts), please replace the button battery to ensure internal clock of CPU board running correctly.



11.5 Cleaning Before cleaning the relay, ensure that all AC/DC supplies, current transformer connections are isolated to prevent any chance of an electric shock whilst cleaning. Use a smooth cloth to clean the front panel. Do not use abrasive material or detergent chemicals.



11.6 Storage The spare relay or module should be stored in a dry and clean room. Based on IEC standard 60255-6 the storage temperature should be from-40°C to 70°C, but the temperature of from -10°C to 40°C is recommended for long-term storage.



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Chapter 12 Decommissioning and Disposal



Chapter 12 Decommissioning and Disposal 12.1 Decommissioning 12.1.1 Switching off To switch off the RCS-974, switch off the external miniature circuit breaker of the power supply.



12.1.2 Disconnecting Cables Disconnect the cables in accordance with the rules and recommendations made by relational department. DANGER: Before disconnecting the power supply cables that connected with the PWR module of the RCS-974 make sure that the external miniature circuit breaker of the power supply is switched off. DANGER: Before disconnecting the cables that are used to connect analog input module with the primary CTs, make sure that the primary CTs aren’t in service.



12.1.3 Dismantling The RCS-974 rack may now be removed from the system cubicle, after which the cubicles may also be removed. DANGER: When the station is in operation, make sure that there is an adequate safety distance to live parts, especially as dismantling is often performed by unskilled personnel.



12.2 Disposal In every country there are companies specialized in the proper disposal of electronic waste. NOTE: Strictly observe all local and national regulations when disposing of the device.



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Chapter 13 Manual Version History



Chapter 13 Manual Version History In the latest version of the instruction manual, several descriptions on existing features have been modified. Manual version and modification history records Manual Version Source



New 1.00



1.00



1.01



Software Version



Date



V1.11



2009-06-22



Form the original manual.



2010-12-02



1. Add a setting item “Language” for selecting default displaying language for equipment.. 2. Add menu item “Language” for selecting default displaying language for equipment.



V1.11ECKF101212



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Description of change



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