Answer / sheikh

Do you means over & under current protection relay and under
, over voltage relay . if yes then symplestic matter where
is need of over and under vol,protection and where is under
and over current protection.

what are earthing material

1 Answers  

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Why DC excitation is used for alternators? Why cant it be AC?

35 Answers   ABB, Ace Info, Alstom, Shalivahana Power,

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In electric motors, according to the no. of compartments, The no. of input's (pantagraph collector's) were increased, why?

1 Answers  

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Why SF6,VCB,Oil Ckt Breakers are use in HT Side need brief information ?

5 Answers   Shell,

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We are installing a 1.6 MVA transformer at our crusher plant and the feeder of HPSEBL is 2 km away at substaion . and a VCB is installed in the substaion which is 2 km away from transformer so we need another VCB near the transformer.

2 Answers   SCPL,

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High voltage test procedure of in swgr board. why should measure millivolt drop on testing time?

0 Answers   NTPC,

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What are the different sizes of cables for H.T and L.T side of supply?

7 Answers   Bhel, BSES, Karthik Industries, Lanco, Nedco, Shilpa Electrical Engineers, TATA, Torrent Power,

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Why we use RYB phase sequence?

3 Answers  

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tube light how its working.,?

3 Answers  

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why we avoid parallel operation of diesl generator?

4 Answers  

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what is difference between 3.5 core and 4 core cable

5 Answers   Havells,

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True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)

0 Answers  

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