Answer / guest

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difference between semiconductor & conductor & insulator?

0 Answers  

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"TRANSFORMER MODELING AND ANALYSIS" MEANS WHAT AND WHICH TOPICS U READ IN THIS

0 Answers  

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what are the differences between 'exhaust fan', 'heavy-duty exhaust fan' & 'super heavy duty exhaust fan'. what are their power ratings ?

0 Answers   CG,

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why indian power system having 11.22,33 KV ???

6 Answers   Titan,

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what is transformer

63 Answers   ABB, Advance Power Controls, CERC, Electrical, Electrical Supervisor Competency Certificate, ETA, IBM, Jindal,

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What is the minimum permissive IR value for LT & HT motor for safe starting?

1 Answers   Rukmani,

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What kind of maintenance is conducted for Transformer

0 Answers   Gulf, UB Engineering,

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what is the full Form of AAC ant conductor?

5 Answers  

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What is meant by control system?

0 Answers  

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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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What is the diffrence in between Class PS & Class 5P10 for CTs

7 Answers  

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what is function of centrifugal switch in single phase induction motor..?

3 Answers  

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