plz tell me about BACK emf and how it generates?

2 Answers  

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IF i have switchgear with busbar current rating of 1000Amp 35kA then is it necessary to have outgoing breaker kA rating to be equal to busbar kA rating?

6 Answers   L&T,

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WHAT IS M.P.C.B

3 Answers  

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depletion layer will form beforre biase or after bias ?

2 Answers  

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In A.C systems, fuse is placed in phase-in order to disconnect the circuit during faulty condition. But, what is the reason for putting "LINK" in neutral istead of connecting through (same) wire.

3 Answers  

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why we don't use air circuit breaker on H T line in place of vacuum circuit breaker ?

2 Answers   Jindal,

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Tell me about Simence PLC 'BLOCK'.How many types and what for.

1 Answers   Gurit,

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What is the rating of a circuit breaker needed for 300 kv load in 33KV supply line of 33/415 transformer ? Whether 800/1200 amp vaccum circuit breaker can perform for a 33 KV line in input in 415 volt in output of the transformer ?

0 Answers   Hira Group,

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why battery room in substation is black coloured?

4 Answers  

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What do you mean by turns ratio of instrument transformer?

0 Answers  

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Why AC & DC capacitor are use in UPS ??????????????????

0 Answers   Sanghi,

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. Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV, 20kV, 30kV?

3 Answers  

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