We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?

1 Answers  

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why we use lamination or layer by layer cor used?

4 Answers  

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What is mean by PID controller? And what is its Long form?

9 Answers   Jindal,

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how to electronic energy metter failed in electomagnectic fild passing in the metter and which thing to defect more on metter.

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what happen if we supply ac to the field of a alternator?

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how to maintain standard votage in power system?

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where this neutral connection goes after returning from the load(home ,factory,industries).Is it grounded at the transformer side or atthe generator side .If it is grounded then we also ground the earth connection.is there any problem with this.

1 Answers   IOCL,

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which stabilizer is better ? AVR, Servo Stabilizer, Static stabilizer etc & why explain it

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What is the working mechanism of OLTC in Power Transformers????

0 Answers   KSEB,

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Why one can experience electrical Shock due to Voltage or Current?? or both voltage or current??

11 Answers  

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what is the disadvantages of star connected alternator?

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What is the minimum load that you can keep in a 3 Phase 40 KVA Diesel Generator? Is it neccessary to load all the 3 phases? Can a phase be left without load?

2 Answers   DRDO,

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