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Contactor between LINE reactor and VFD?

Tip DS

Tip DS

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Location
The Great Meme State
Occupation
Electrical Engineer
In a scenario where there is a panel controlling a primary and backup motor, it would be advantageous to use the same up-stream hardware (over-current protective device (OCPD), reactor and disconnect) for two different variable frequency drives (VFDs).

Are there any issues (technical or code compliance) with placing the contactor between the reactor and the VFD? (This is not a load reactor; it is a line reactor.)
 
don_resqcapt19

don_resqcapt19

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Location
Illinois
Occupation
retired electrician
Kind of defeats the purpose of a back motor as you still have multiple common points of failure. However I don't see a code or technical issue doing that. It is common to have a VFD with an across the line stater in the same cabinet for a back up if the VFD fails. The switching between the VFD and the starter is via a line side contactor.
 
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