I had this in a practice test and would like some help solving.
Q. An industrial plant has an inductive load of 400kVA operating at a power factor of 0.6 lag and a resistive load of 40 kWatts. A synchronous motor is used to correct the power factor to 0.9 lag.
Assuming the synchronous motor produces no watts the corrected plant kVARS will be ?
Now i was wondering if i have to find the kVARS or Q of the 0.6 PF first, then the kVARS of the 0.9 PF, and take the difference as the corrected plant kVARS? The answer given is 135.5 kVARS, but i cannot seem to arrive at this number.
Any assistance is much appreciated.
Q. An industrial plant has an inductive load of 400kVA operating at a power factor of 0.6 lag and a resistive load of 40 kWatts. A synchronous motor is used to correct the power factor to 0.9 lag.
Assuming the synchronous motor produces no watts the corrected plant kVARS will be ?
Now i was wondering if i have to find the kVARS or Q of the 0.6 PF first, then the kVARS of the 0.9 PF, and take the difference as the corrected plant kVARS? The answer given is 135.5 kVARS, but i cannot seem to arrive at this number.
Any assistance is much appreciated.
Last edited: