Answer / shahulsnfa

In electric meter we will have CT for measurement. Each
phase will have one CT. so in 1 phase one CT will be there.
in 2 phase will be there but they both will be connected in
such a way that the total measurement is also can be
measured. 3 p will have 3 CT else all same as like previous

in 11kv/400v transformer when only one phase of 11kv supply fails what happens to sec voltage and why

6 Answers  

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Dear All, If we have 8No. 11kV cables running underground that are required to supply 20MW to a new development. What is the sustained current in Amps? Please advise.

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difference bewteen reverse current and alternating current

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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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How do you find HT and LT sides of a distribution transformer only by looking at it from outside?

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how many BUSBAR is in electrical system?

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which is the gas used in tube light?

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