Answer / Zenia Malhotra

b" Oil-immersed transformers or Dry-type transformers

Size of the power cable like 1.5,2.5,4 sq.mm which area calculated from whick area or how specified the size?

1 Answers   MRF,

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Show Details FROM:Muhammed Ikram TO:qa@allinterview.com Message flagged Saturday, June 4, 2011 10:07 PMMessage bodyHello all, i want to ask a question to all of you that what is VMM (voltage monitoring module )? how it work,s? i heard somewhere that it compare 1 phase voltage to other phase voltage. but there is also some setting on it. how to set it,s setting. please tell me briefly. Thank,s and Regard,s. Muhammed Ikram.

1 Answers  

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What is the name of transformers oil filteration equipment?

1 Answers   Reliance,

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why only exciting current is shown not primary current in transformer???

1 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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For Eg a 30 kw motor at full load how much kw it takes And at no load how much KW it will take?

1 Answers   GEPL,

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Is a d.c.compound motor is use as a booster? how?

1 Answers  

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how capacitor active and reactive.

1 Answers   Birla,

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Why is reating of t/f in kva but for inverter in kw ?

3 Answers   UPPCL,

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is there any concept of armature reaction in Induction motor?

4 Answers  

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What is AMP and KA in a MCCB and MCB

2 Answers  

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why we connect the capacitor bank in star , not in delta in any system

2 Answers  

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