AVR Testing [PDF]

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DIFINITIONS:1. Voltage regulation: In a power supply, the automatic holding of the output voltage to a constant value, despite variations in the input voltage or load resistance resistance.. 2. Current regulation: In a power supply, the automatic holding of the output current to a constant value, despite variations in the input voltage or load resistance resistance.. 3. Automatic voltage regulator (AVR) : An automatic feedback control system that is responsible for maintaining a scheduled voltage either at the terminals of a synchronous generator or at the highhigh-side bus of the generator stepup transformer transformer.. The control is brought about by changing the level of excitation excitation..



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PERMANT MAGNET



FLASHING



4 AVR (I/P or POWER SUPPLY) is the method that enables the machine to build up its voltage.



To test AVR we should provide the three indicated i/p elements : $%&'()*+&,-./*+&.'+. 0 $%&'()*+&,-./*+&.1.&* 2 -./$. )., 4The test we made ,was on the AVR of the emergency generator & its power supply is a permanent magnet type.



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The lamp position



Light (The circuit is ok)



Dark (There is a problem in the circuit) So check terminations ,transformers , all cards ,capacitor ,rectification circuit & so on



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