what is the main function of contactor?????

9 Answers  

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Explain the grounding concept adapted in aircrafts?

2 Answers  

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What does negative slip of an induction motor signify?

10 Answers   Tata Elxsi,

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what is mean by descripiency relay? & wht is its ansi code?

0 Answers  

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During Millivolt drop test current leads are applied in the extreme ends and voltage leads are given just before the current leads.. what will be the difference if voltage leads are given in the extreme ends? and why?

1 Answers  

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Type of cable insulation?

3 Answers   Essar,

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What are protection of power transformer?

1 Answers  

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i want to ask that as everybody knows that in star connection on star point is called neutral. my question is that why on that poin called neutral. what is the reason behind it. what is the logic behind it. i heared somewhere that on this point all phases current become zero thats why. if this answer is right then prove why on that point is current become zero. if this answer is not right then tell me the right answer. post ur answer here or on my mail address. m.ikram786@yahoo.com m.ikram555@gmail.com. thanks.

1 Answers  

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draw waveform of capacitor or inductor in a d.c ckt(during transient) with zero resistance with it(in series or parallel)also neglect resistance of wire

2 Answers   L&T,

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why single phase induction motors are not self staring ? how can we start the 1-phase Induction motor ?

3 Answers   BDL,

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why Square root 3 used for three phase?

2 Answers  

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internally connection of photvoltic module

0 Answers  

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