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Can you put an output contactor between the motor and the output of the VFD drive to cycle motor off and on?

Published date: 18 June 2020

Issue:
Put an output contactor between the motor and the output of the VFD drive to cycle motor off and on.

Product Line:
Altivar drive

Environment:
All

Cause:
Contactor installed on the output of VFD drive.

Resolution:
It is not recommended because when the contactor opens while running it can damage the IGBT`s ( output devices ).
This is not a suitable application for starting and stopping a motor that is running.

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