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Asked By: vijendra_mits
| Asked On: Jan 27th, 2012
A 3-phase induction motor running on 500v at full load draw 40a current at 0.85 PF lagging if 85 micro farad capacitor connected across its terminal than what would be a new power factor?
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You didn't specify the capacitors connection is delta or star
assuming (delta)
Xc = 37.462 ;
reactive power drawn by capacitor = 6684.49 VAR
active power drawn by motor = 34641 watt
old power factor = .85 lag
new power factor = .91 lag
--> Find the reactance offered by capacitor i.e 37.46 ohm. so leading current drawn by capacitor is 9.095A @90 deg lead. --> Current drawn by the motor is 40A @ 31.788 deg lag. --> Resultant current ...