What is difference between 3 point and 4 point starter

1 Answers   Genco, Kaltec, TATA,

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why dc supply given to ac alternator rotor

3 Answers  

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what is meant by reactive power ,active power & real power ? thank you

2 Answers  

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We have one Energy meter for Measuring the voltage,current,power,energy(KWH,KVARH,KVAH) & power factor.The problem is that the meter does not show whether the PF is lagging or leading.So i want to know that is there any way or calculation to find out that whether the PF sign (lagging or leading) depending upon the above mentioned parameters?

4 Answers  

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explain the meaning of harmonic resonance

0 Answers  

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What is the speed of 3 phase IM(Induction motor) at no load? How will the Motor meet the increased load(Explain through fundamental)?

2 Answers  

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what is the procedure to carry out BDV test of a transformer ?

3 Answers   BirlaSoft,

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define IDMT relay?

15 Answers   APGenco, Bhel, L&T, Shriram Finance,

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why voltage is low at reciving end in summer??

4 Answers   JSW,

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for a 400kv t/m line with 10 ampere current will corona occur?

0 Answers   NPCIL,

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What are the neccessary safety arrangements before commissioning of HV substation?

1 Answers  

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1 sq mm conductor=? how many amps

3 Answers  

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