Answer Posted / karthik raman.b

from the size of the cable we can find particular sq mm we can
send some current

63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?

2750

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Usage of flywheel diode in relays

1931

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Pl. brief about break-down maintenance of machine tool.

1805

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how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable

1615

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what is the effect of vector group while phase sequence of a generator changes,whether the vector group changes or not

2116

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If you have an earth with pilecap then your resistance is really low. why and how?

2009

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how to differentiate a mpcb,mcb with a contactor? Explain their working operation

2226

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What's the difference between non break power supply and non break non short break power supply

1450

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Plz tell me how we can find that particular company has vacancy or not

2274

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what is V.L.F. testing of power cable? do you know the voltage ratings, like for what rating and size of cable what rating of V.L.F. testing is used?

2356

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I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

1978

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What is different between resistance grounding system and resistance earthing system?

1155

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What is steady state response?

1326

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Which material is used for the core of a transformer and why?

1113

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Sir, plz tell me how droop setting is done in parellel operation od DG set ? please give practical example ?

2144

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