200 V Motor VSD Overcurrent Fault

[koolbean]

I just installed a 15HP 200V/3 phase/60 HZ motor, (FLA 40.6), powered by a 15 HP Yaskawa VSD. The drive trips on overcurrent at about 45 HZ. Thinking I may have a bad motor, I by-passed the drive. The motor ran fully loaded at 60HZ at 30 amps. Thinking maybe the drive was programmed wrong, I ran a jumper to a near-by existing identical drive, and still hit the overcurrent (41 amps) at 45 HZ.

Any ideas why the motor operates without issue when by-passing the drive, but trips on overcurrent when attached to the drive?

Thank you for helping.

 

[jraef]

One possibility:
If you left the VFD set to factory defaults, it is likely thinking you have a 230V motor and the VFD will calculate your V/Hz ratio around that. This means it will be assuming you want 240V at 60Hz, not 200V. But you have a 200V motor, so the motor is being over excited, which causes an increase in current consumption without benefit of increased output power. At around 45Hz the current pulled by the motor is already too much to fit the OL curve, which is based solely on the FLC that you programmed into the VFD for protection purposes.


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[powerjunx]

kindly re-check the OL limit/setting on the user manual.Jraef, had the point you're may over -exited the motor.



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