wats the procedure to calculate no of batteries for ups?

1 Answers  

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how the inductor will work on dc supply?whether it will work or not?

11 Answers   NTPC,

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what do you mean by earth fault in transformer?

2 Answers   L&T, UPL,

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What would be the ratio of a Delta-Wye tranformer having 48000 volts phase to phase on the primary and 4160 volts phase to phase on the secondary?

5 Answers  

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what is difference between c-power & u-power air circuit breaker?

2 Answers   Areva, IIT, Marine Electricals,

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Can you any one explain application of buccholz relay operation and pressure relif device operation of power transformer

0 Answers  

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what will happen when a bulb s connected btwn two phases of a three phase delta connected source?

6 Answers  

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why do fans generally rotate in anti clock wise direction??

2 Answers   BMS, FIS, IBM,

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sir, i want to know the calculation for find rated current for cable sizes.(both copper & aluminium) with examole. please sir for example: 35sq.mm al.cable is withstands for how many amps? is suitable for 45kw motor?

5 Answers   L&T,

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why Y CONNECTION IS BETTER INTERMS OF EFFICIENCY AND P.F FOR A LAOD LESS THAN 40% AND WHY AFTER DELTA IS BETTER FOR > 40%

0 Answers  

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why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?

0 Answers  

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what is the ciruit diagram of transformer vector grup test?

4 Answers   Green Power,

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