how to calculate the input current in singel phase and 3phase supply to 5kva ups

1 Answers   Gravity India,

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How PSV sizing being done

0 Answers  

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what is the common earth

0 Answers  

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why the power cut problems occur in tamil nadu? may i know the exact reason.plz

17 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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list of tests to be carried out at manufacturers end while purchasing a step up transformer of 11kv to 66kv ,2MVa Capacity.

0 Answers  

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what is reactive poower

3 Answers  

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please tell me when we start motor without load in star or delta connection whose current above condition,pl write formula

0 Answers   Foxconn,

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Why machines are avoided to work is saturation region of B- H curve?

3 Answers  

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WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?

0 Answers  

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what is relay multiplier

1 Answers   Atomic Energy Commission, Bhel, Wipro,

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What products have you designed which have entered high volume production?

0 Answers   Intel,

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