if 6 earth pit value is 1.5 ohm then what should be the number of earth pit to make the value .8 ohm

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Why we use cosine angle for calculating power factor not in sine angle ?

4 Answers  

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why to use freewheeling diode ( diode in revers bias mode) across dc coil

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what is the difference between transformer and amplifier ??

5 Answers  

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what is the pi test for current transformer?

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what is mathematical relation between ac to dc current how will convert Iac=50amp to Idc

7 Answers  

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wht is the difference between volatge and wattage ? how can it be converted ? (like 15w = 6v ) like tht... ? actually what tht means ?

3 Answers  

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what is diffrence b/w -48vdc and +48vdc ?

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What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks

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when running 2 nos 450kva dg sets in parallel operation ,in one Dg set power factor and Kvar going to lagging and ampere suddenly going high,please give me suggestion to correct the same.

2 Answers  

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What is the function of RCCB? What are the different sensitivity ratings & each application?

6 Answers   Wipro,

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5MVA TRANSFORMER SUDDENLY FAIL WITH THE PRV TRIPPING AND LARGE AMOUNT OF OIL SPREAD OUT? SO IT CAME BACK WITH THE REPAIRING WITH REASON THAT IT FAILS BCOZ OF TRANSIENT EFFECT? SO PLZ EXPLAIN HOW DOES IT HAPPENED?

1 Answers  

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