if we want to increase the back up time of an UPS what should we do ? if we want to decrease the charging time of a battery/batteries attached with the UPS what should we do ?

6 Answers  

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What is the Operating Powerfactor of UPS??? Why??

3 Answers  

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how much earth resistance consider to commissioning the transformer?

3 Answers   Deccan Cements,

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How many points can we have in AC Circuit? Show by giving suitable example?

3 Answers  

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What is the actual formula for transformer short circuit test? below i given rating of the transformer.. 1000KVA, pri 11KV, Pri amp 56A. %Z 5.95..

2 Answers  

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IF TVM OF TRANSFORMER SHOWS POWER FACTOR ON 33 KV SIDE AS 0.97 LAGGING AND ON 132 KV SIDE IS 0.75 LEADING.IS THIS CORRECT.WHERE IS PROBLEM.

0 Answers  

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How to parallel a alternator without using synchro scope or lamp methods

1 Answers   Ofer,

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why there is no grow of grass under the high voltage transmission line?

3 Answers   TATA, Tata Power,

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What is clean Earth System ?

3 Answers  

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What we change frequency from transformer. yes or no

3 Answers   Intas,

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What is a soft start?

2 Answers   Bhel, jlpl,

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what is meant by GD2 ?

1 Answers   Kirloskar,

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