Motor Power Factor Correction
Motor Power Factor Correction
(OP)
The problem i have is a balanced load motor which has a rating of 195A on the name plate, yet it doesn't give a power factor, so we manually measured it with a clamp meter at the supply to 0.56, so does this mean when we measure the current at the supply(using clamp meter),is the maximum we can give the motor still 195A, or can we give it more to compensate for the poor power factor?





RE: Motor Power Factor Correction
RE: Motor Power Factor Correction
#1 - 56% was probably measured at a low load (what was the current? what is nameplate speed?... low-speed motors usually have even lower power factors at low load than high-speed). If I measured 56% at FLA for an integral horsepower 3-phase induction motor, I would start wondering what's wrong with my motor.
#2 - You cannot increase loading above FLA or SF*FLA based on the power factor. The current is most directly associated with the heating that limits the motor capacity. And the power factor is known/accounted for in the motor rating.
RE: Motor Power Factor Correction
RE: Motor Power Factor Correction
RE: Motor Power Factor Correction
http://www.squared.com/us/internet/pfc.nsf?OpenDatabase
RE: Motor Power Factor Correction
The problem i have is a balanced load motor which has a rating of 195A on the name plate, ///How many phases?\\\ yet it doesn't give a power factor,
///Which is ?\\\
so we manually measured it with a clamp meter at the supply to 0.56, so does this mean when we measure the current at the supply(using clamp meter),is the maximum we can give the motor still 195A, or can we give it more to compensate for the poor power factor? ///Could you describe how you do this or how you intend to do this? The motor nameplate data posted would be very useful.\\\