What is the difference between Off line UPS and Line interruptible UPS?

1 Answers   Etisalat,

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How do you calculate of power factor, if it is lagging or leading for unit(1).

4 Answers  

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why do we need transformers?

12 Answers  

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why do the alternator doesnt have open circuited windings in armature???

1 Answers  

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what is %impedanece

3 Answers   KSEB, Steel Plant,

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what convarts RRA in alternator ,AC to DC or DC to AC,

1 Answers   Birla,

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which signal we found accurate reading of analog signal or degital signal and why?

1 Answers  

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how do i convert 22kw to kva

4 Answers   Stag Computers,

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why the generator will take 8 to 12 hours to start after it got interrupted due to technical problems in case of power plants.

1 Answers   NTPC,

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What is the difference between earthed & unearthed system?

2 Answers   HCL,

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what is dry and wet frequency withstand voltage? why & where it is used??

0 Answers  

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what must be the mf for a meter with the following conditions. line ct ratio-100/1 line pt ratio- 220kv/110v meter pt ratio- 3X63.5V meter CT ratio- -/1 A

1 Answers  

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