What is the thumb rule for calculating the P.F correction
Capacitor?? Say for 100 hp motor how much micro farad
Capacitor is needed .... Thumb rule so quick answer wanted
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Answer / kapil
Requd. KVAR = Running KW*{tan angle (OF running Load)- tan
angle (of P.F. Requried)}
| Is This Answer Correct ? | 4 Yes | 3 No |
Answer / himanshu
Motor is an inductive load so it is consuming
active power that depends on its load and
reactive power that is consumed by motor to set up its
magnetic field it is constant so we should connect a
capacitor which consumes the negative reactive power
according to p.f. correction requirement.
| Is This Answer Correct ? | 5 Yes | 10 No |
Answer / santosh
Approx. one third of HP rating of 3ph motor is kvar of
capacitor required.
| Is This Answer Correct ? | 3 Yes | 8 No |
Answer / rajnikant
First convert HP into KW.
1HP = 746 KW
Then assuming 0.8 powerfactor of motor,calculate KVA
KVA = KW x powerfactor
now calculate kvar by using following
KVAR = square root of (square of kw - squre of kva)
| Is This Answer Correct ? | 3 Yes | 10 No |
For 100 HP load kVAR required will be half i.e 50 kVAR. If
you go for proper calculation, ans would be closer.
| Is This Answer Correct ? | 8 Yes | 18 No |
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