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Can a motor contactor or disconnect switch be installed between the VFD and the AC motor?

April 26, 2017AC contactor disconnect installed motor Switch vfd

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Can a motor contactor or disconnect switch be installed between the VFD and the AC motor?

1 Answer

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Operating a motor contactor or disconnect switch between the VFD and the AC motor, while the VFD is running, can cause severe damage to the VFD. Such devices can be used if they are only operated when the drive is in a STOP state.