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1.what is use of isolation transformer. 2.Differance between KWH,KVAH,KVARH,KVA. 3.Main use of the CT and PT.

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why we have to do tan delta test of the transformer oil???

5 Answers  

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WHAT IS RETARDATION TEST IN DC MACHINES?

4 Answers  

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What is the actual calculation for transformer short circuit test?.

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what is the meaning of improving the power factor (give technical ans not therotical)

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Is there any problem about which the drive (inverter) doesn't show/display the alarm and/or fault but instead of this , it doesn't work ? I want to know that could there be any kind of problem in the drive when the drive doesn't display the alarm and/or fault ?

0 Answers   Siemens,

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It is observed that AVR of an Alternator is more likely to fail if the Generator and Mains Neutral are directly connected to each other. Why should this be so?

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A 4-Pole D.C. Generator has a speed of 1500r.p.m. Then what will be the frequency of D.C. Generator ?

9 Answers   IBM,

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what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.

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how does ELR works? explain

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i want to know that what is the eligibility critaria for ongc exam?

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HI,how to know that the MEGGER which i am using is working properly,reply....thankyou

2 Answers   NTPC,

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