Answer / prakash

UPS Paralleling means distribution of load between two or
more UPS'. Or you can use one as backup or stand by ups.

While paralleling the UPS, one must check following,

Input Voltage, Neutral to Earth Voltage, Neutral earthing
etc.

how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?

1 Answers   ONGC,

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why neutral busbar size is SAME of the phase busbar size UPTO 200A IN LT PANELS

1 Answers   IBS,

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what is a tri vector meter? what are the tri vectors?

2 Answers  

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Hydro P.P. run @ 600 rpm,8pole, Nucler P.P @ 1500rpm 4 pole , ThermlP.P @ 3000 rpm 2 pole.Why this diffrence??? when we can generate electricity @ 600 rpm then Why we had incresed speed in NPP & TPP???

3 Answers  

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specify the inbuilt protections in DG

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How RTCC works with OLTC

1 Answers   Siemens,

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Explain about Leakage Test.

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What are the criteria shall be considers for sizing Fuse and MCB? If the rated current is 10Amps what should be the fuse size / MCB Size?

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DIFFERENCE BETWEEN NORMAL TRAFO AND THRISTER TRAFO?

0 Answers   Essar, MahaGenco,

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dear friends plz send link about reluctance & universal motor .thank u

4 Answers  

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WHY SPEAKER OUTPUT IN WATTS??

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State and define norton’s theorem?

0 Answers  

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