Answer / guest

Because DC supply has polarity + and -

Hi friends. m 3 years drop. now d company asks in d interview d reason 4 my drop.what shud b d probable answers 4 that which may not put a negative impression.

2 Answers  

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How each of the following losses occur in d.c machines (i) copper (2)core (3) windage (4)friction please help me

0 Answers  

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which type of oil is used as a transformer oil?

3 Answers   JSW,

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how to decide choke rating for drive?

0 Answers   Reliance,

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What do you mean by Transformer?

9 Answers   Hyundai, NTPC, wbsedcl,

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What is difference between YNyn0 and YNyn ??

0 Answers  

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what is hormonics. how it is generated & what are the problem faced by that.

5 Answers   APC,

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what is LUX?

4 Answers   NTPC,

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i have dry type transformers can you help me that how many tests i can do to know the performence of transformer and also please tell me about the BDV test and Insulation resistance test in oil cooled transformers

4 Answers   Hyundai,

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If induction motor load is incresed motor speed decrases.But in syncronous motor load incrases speed canstant why?

5 Answers  

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In tranformer winding Connection Like Dyn1 ,so LV lags Hv by 30 deg and Dyn11 LV lead HV by 30,so how do this lagging and leading afffect the transformer??

2 Answers   Siemens,

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What is Harmonics & what are its efect & which harmonic is dangerous

5 Answers   IBM,

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