Answer / vadhvana ashish

The rectifier is convert to ac power to DC power.

And does not generate to the ac power of the rectifier.

How to calculate no of EARTH PIT? Describe the formula as per IS standard?

0 Answers  

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Explain cmrr?

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why does the magnetic balance tests at transformer?

0 Answers  

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how to calculate lux level in out door (yard lighting) please expalin with a example

1 Answers   IVRCL,

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why the field winding of synchronous machine is excited by dc source

2 Answers  

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what types of fault occurred in transmission line ? which protection function senses the fault?

1 Answers  

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Why we call cable rating in SQ.mm.If it is 240 SQ.mm how much the diameter possible?is there any calculation ?

4 Answers  

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opkinson's test

0 Answers   Bhel,

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what is the burdon in case of relays?

1 Answers  

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how calculate the current faut level

2 Answers   ABB,

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differtiate between energy consevation and energy efficiency..

1 Answers   L&T,

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Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?

1 Answers  

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