when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

3 Answers  

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what is Over current, earth fault (O/C+E/F) ?

2 Answers  

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If auto trip is operated, can you close the breaker.

2 Answers   KSEB, L&T, Siemens,

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How to calculate the ups battery back up? give the formula.

15 Answers   Cushman Wakefield, Ethio Telecom, Exide, MacLellan, Morgan Stanley, TATA,

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how to size a diesel generator set?

1 Answers  

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what is sinwave ups

1 Answers   Exide,

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what is mean by derating factor?

4 Answers   Essar,

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Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

0 Answers  

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Why substation battery room is coulered black?

1 Answers  

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if a train is running on a speed of 40 K MPH and crosses a individual passing by him in 48 secs who is riding a horse with a speed of 25 K MPH. what is the length of the train?

2 Answers  

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Difference between On Line capacitor and Station Type capacitor.

0 Answers  

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What is the rate of WCT on the Electrical Contracts comprising of DG Sets and Civil Works in Delhi ?

0 Answers   MES Military Engineer Services,

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