Hi,

I would like seek clarification on the three phase power calculation.

Using the clamp meter, i obtained the VL = 415 V and the IL=10.7 A. On the other hand, my power meter indicating a reading of 4750 W.

Thus, my power factor = 4750/ (1.732x415x10.7)
= 0.62

Why is the power factor is too low? From my understanding, the advisable power factor is approximately 0.9?

Is this low power factor value is due to problem of the compressor (manufacturer fault) or bad electricity efficiency on my side?

To be honest, i understand the mathematical meaning of power factor (high pf, means low amps draws and etc), but i cant get the physical sense of it.

Please help.

Regards,
jaya