Answer / wareagle

Have you heard of Google?

http://en.wikipedia.org/wiki/Ground_(electricity)

Answer / mahesh meshram

All aux. Neutral and body is connected to earth. If the connected load is healthy then the voltage between neutral and earth should be zero. If due to any of aux. fault or due to improper connection of earthing or imbalnce load the voltage between neutral and earth increases and it's not app zero varies at various locations if various aux are connected on same earthing in that case earthing is said to be floating .

To prevent the mal operation of a differentially connected relay while energizing a transformer, the relay restraining coil is baised with (a)second harmonic current (b)fifth harmonic current (c)third harmonic current (d)seventh harmonic current

2 Answers  

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how to meas-our losses for L.T & H.T

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The iron loss in a 100kva transformer is 1 kw and full load copper losses are 2 kw, then what is maximum efficiency occure at a load?

3 Answers   MPSC,

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What do you mean by turns ratio of instrument transformer?

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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

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hi frenz,its aswathy.i hve aplied for the hpcl test on feb,pls send the test patern & the placement papers as soon as possible. mail-id :kjaswathy@gmail.com

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do you know measure the earth resistance?explain

1 Answers   Dalkia,

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What determines the thermal loading on the motor?

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why generator efficiency is more in swinburnes test?

0 Answers  

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What are HT & LT Cables? What are their values?

3 Answers   IOCL,

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how to select diiferent power transformers of same capacity on no load loss and full load loss by economical point of view.?

0 Answers  

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What is the In door to Out door Sub Station.

5 Answers   L&T,

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