Answer / shiv shanker

Ct current protection device

how do you find making current and breaking current of the circuit breaker

1 Answers  

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what is efficient load of transformer in percentage

4 Answers  

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why do we provide metallic enclosure to bus duct and then ground it?

1 Answers  

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How efficiency of thermal plant can be improved?

0 Answers  

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what is ramping rate of generator

0 Answers   Core,

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induction motor. we have a three phase supply from diffrent source like R= transformer. Y = DG sets. B = ups. if motor is runing.

4 Answers   Birla,

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what is the formulae for selcting capacitor bank to increas pf

3 Answers  

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what is the best method of grounding in 30 MW generator?

0 Answers  

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how much current does 3ph. 10 hp ac motor draw.

8 Answers  

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why we still use sinusoidal waveforms for transmission and utilisation (we know generation is sinusoidal), instead of other ac waveforms such as triangle, sawtooth, square etc.,? is there any mathematical derivations to prove sinusoidal is efficient than others?

1 Answers  

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Why selected cable colour red yellow and blue in 3 phase Electrical system?

9 Answers   Crompton Greaves, Essar, Gridco,

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An 11kv system consisting of an underground cable to a sub station about 300 meters away was shut down for about 10 hrs. On energising, it tripped off on earth fault about 10---20 mins later 6 times but since than it is not tripping.its already 3 weeks now. The SPAJ was found to be fine. what could be the cause.No test had been done to determine the cause of the trippings till now because of demand.

2 Answers  

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