Answer Posted / k.prakashchandra

Flux = K V/f . Over flux relay is for protection against over voltage and under frequency and you can have under flux relay also for under voltage and over frequency

For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

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PLZ sent the previous year question paper for GET in NHPC on my EMail id ppshanker@gmail.com

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