how much earthings are mendatory at a 25kva sub station?

3 Answers   Bhel,

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what is sevice settings for mccb?How can be it setted?

1 Answers  

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

5 Answers  

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what is ment by doublefield revolving theory?

2 Answers  

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FACP Means

1 Answers   RR,

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A 6.6 KV/ 440V Xformer. what are the imporatant parts & equipment required for it's protection panel.

0 Answers   APTransco,

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Q: How to calculate Transformer losses , tell us by Formula.

0 Answers  

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will we have to design the UPS differently for both i.e. if we want to connect the two batteries in parallel and/or we want to connect the two batteries in series ?

4 Answers  

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1.what type of wave is produced from i.online ups ii.offline ups iii.inverter.why don't we use inverter instant of offline ups for computer,what's the reason?

2 Answers  

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what's the meaning of the negative going half cycle in the circuit containing a bulb and a switch in series with a input ac source. i mean what happens in the -ve cycle. the dir. of current changes or any other thing. if dir. changes then why we use fuse in only phase wire.

2 Answers  

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WHAT DO U MEAN BY THERMAL OVER LOAD RELAY& WHERE THEY ARE BUSED

4 Answers   L&T,

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What are the technical reasons for soaking transformers for various times before allowing them to pick load after a fault ?

4 Answers   GE,

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