Answer Posted / alok

If phase to phase voltage is up to the thersold voltage of Lamp it will glow, A voltage greater than thersold voltage will damage the Lamp

explain working principle of earth leakage relay

3760

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at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.

1721

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Explain cos(theta) and Sin(theta)

2157

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Difference between control junction box (cjb) and power junction box(pjb)?

4429

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how to generator maintenance (A Check, B check,Etc)

2345

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how to get bearing & winding temperature of an induction motor?

2094

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Whether it is possible to measure energy at the input of rectifier transformer (12 pulse with very high odd harmonics)

1957

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what is calculation mathod/formaulla for deciding Size of busbar (Copper/ aluminum)for L.T. panel on Various Fault level like 50kA,25kA,10kA

2844

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Different STANDARDS (BS, IS, IEC etc) gives different informations on CT specification. How they correspons w r t each other (i.e I mean to say BS provides "knee point voltage" but IS does not, then how can i select CT)

2008

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How to select the proper VSD to operate high inertial load

1785

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please tell me, how i clear the objective test? when i studied form the one book after i solved the objective ,that time i solved that qes. but if i tried solve objective form the other book then i could not solved these que.

1719

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what kelvin's law ?

2161

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How to select the earthing transformer,for DELTA TO DELTA TRANSFORMER OR ALTERNATOR SIDE.Pls post your answers and calculation.

2429

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what percent do you derate your copper wire when you change from copper buss to copper wire

2042

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What is a surge supressor why its is used in synchronous generators

2057

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