Answer / vishal ingle

THERE IS NO RELATIONSHIP BETWEEN VOLTAGE AND FREQUENCY I.E.
THESE ARE INDEPENDANT OF EACH OTHER.
E.G. IN INDIAN POWER SYSTEM, FREQUENCY IS STANDARD AS 50HZ
BUT VOLTAGE VARIES 230V, 440V, 11KV, 33KV, 66KV, 132KV,
220KV, 400KV, 765 KV ETC

How is Grounding or Earthing achieved in Planes and Automobiles?

3 Answers   ABC,

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The maximum demand of consumer is 2 kW and his daily energy consumption is 20 units. Its Load Factor is (1) 10.15% (2) 41.6 % (3) 50 % (4) 60%

2 Answers  

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in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain

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what is the basic principle of the alternator ????

2 Answers  

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Difference between rating factor of cable and derating factor of cable?

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IN 6.6KV 3 phase switch gear .i will give 6.6kv to R phase only to earth in during H.v testing (through H.v KIT).what happen remaining phases.how much voltage get remaining phases.why? explain.

1 Answers  

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Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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Is C.T will sense the current in both direction. As i know the C.T will sense the current in only one direction.

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magnetizer priciple

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What is restricted earth fault protection ?

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I have 725KVA DG set how to Calculate the Ratio of KWH? Whatb is the Formila

7 Answers   HCL,

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