which is better ac or dc?

2 Answers  

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how does ELR works? explain

0 Answers  

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capacitor is load free component but why ampare meter shows the current when the capacitor bank breaker close?

4 Answers   OPS,

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explain the existence of reactive power in electrical engg?when it generates?

1 Answers  

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why we short ckt the secondry vo5tage/ winding in transfr and motor?

2 Answers  

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What is negative sequence over voltage element?

0 Answers   Green T&D,

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What happens if we run alternator on under frequency? 

0 Answers   SRHHL,

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How relay works, reverse relay, master relay, os relay, earth fault relay and what is its setting point

0 Answers   cpgn,

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What is touch potential and step potential?

0 Answers   IRI,

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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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what is the formula or method to calculate RESIDENTIAL,COMMERCIAL & INDUSTRIAL load power?????

3 Answers   RRB,

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What is “pu” in electrical engineering?

0 Answers  

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