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09-03-2012 01:01 AM

Variable frequency drive shows Power Factor

Most variable frequency drive displays can show me voltage, power and current output to the electric motor, I think all of these might be useful. Some drives can show Power Factor at the ac drives output - Why would I care?

I don't know that many VFD drives have a parameter to show the Power Factor for a motor as it is running on a drive. The ac drives have this as a parameter to look at. What does it tell me, other than the obvious angle between the current and voltage vectors.