what are the duties of commutator in motor and generator?

6 Answers   L&T,

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How to calculate Number of Earthing Pits....???

0 Answers  

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whati s the sludge current in ups

0 Answers   Future Group,

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why neutral grounding transformer is used for generator and why it is not used for transformers?

2 Answers   UPCL,

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WHAT IS THE USE OF PIG TAIL IN WINDOW CT ?

0 Answers  

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1.what is use of isolation transformer. 2.Differance between KWH,KVAH,KVARH,KVA. 3.Main use of the CT and PT.

1 Answers  

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25 kva 3 phase dg how many current will take per phase , plssssssss reply me

3 Answers   Bharti,

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what is the differebt between ac and dc fuse?

0 Answers   IBM,

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1 tr is equal to how many Kw .is there any specific formula for this to get the result .

13 Answers   Cipla, LG, NSN,

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how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

0 Answers   Tyco,

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if an induction motor is operated at unity power factor what will happen? will motor run or not? kindly describe a logical answer?

2 Answers  

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how can we change the supply voltage?

4 Answers   Areva,

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