Why need 3phase machine double earthing?

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ratings of lightning arrester

0 Answers   Bajaj,

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why does the magnetic balance tests at transformers? how to provide earthing in flight?

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Could u pls tell me the NPCIL electrical engineering interview questions for Executive trainee, and also guide me how to face the interview.

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why electron not flow in open loop,how they know path is open ?

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Ohm's law applicable for semi-conductors?

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Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

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Due to velocity saturation, MOSFET reaches saturation a.Before Pinch off b. After pinch off c. At Q point d. Before Q point e. After Q point

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Simple calculation of improving power factor?

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can we use generator(a.c) as a motor.if so how if not why.

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What is the difference between ELCB and RCD

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What is dielectric loss?

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