Can a contactor, placed between the VFD output and the motor, be used for Start/Stop control of the motor?
Issue:
Planning to run VFD continuously at 60Hz output and put a contactor between the motor and the output of the VFD drive to cycle the motor off and on.
Product Line:
Altivar drive
Environment:
All
Cause:
Contactor installed on the output of VFD drive.
Resolution:
This is not recommended and is a misapplication for the VFD. The contactor action of opening and closing the pulse width modulation from the VFD can damage the drive's IGBT`s ( output devices ) and the motor.
Start/Stop control should be applied to the VFD.
Planning to run VFD continuously at 60Hz output and put a contactor between the motor and the output of the VFD drive to cycle the motor off and on.
Product Line:
Altivar drive
Environment:
All
Cause:
Contactor installed on the output of VFD drive.
Resolution:
This is not recommended and is a misapplication for the VFD. The contactor action of opening and closing the pulse width modulation from the VFD can damage the drive's IGBT`s ( output devices ) and the motor.
Start/Stop control should be applied to the VFD.
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