sir, is there any ratio,this much of A.C volt is equal to D.C voltage

3 Answers  

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Earth Resistivity

2 Answers  

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what size of copper busbar use for 11kv 630A

3 Answers   ABB,

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What is the formula to calculate the rating of a three phase trnasformer

1 Answers  

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what is the working of loss of excitation relay (40G)? how it is work?

1 Answers  

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How can we get a Neutral from a three phase suply? If we meet all three phases at a point to take neutral then why dont thay get sparked?

1 Answers  

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Can we calculate the P.F if we know the only load on alternator .

1 Answers   Medha, Medha Servo,

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How to know the back up time for a 5KVA UPS which is connected to 15 nos. of computers? Is there any formula for this? pls. tell me.

1 Answers   S V Sugar,

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which relay is used on long transmission lines

10 Answers   ABB, Bhel, Student, Tata Steel Limited,

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1. What is differential relay? How it operates?

3 Answers  

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What is the function of stater in tube light circuit?

2 Answers   SysArc,

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why do we use star-delta starter. what is its need?

6 Answers  

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