Multiple Voltage Sources

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350MCM

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Ohio
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Electrical Engineer
I was asked to work on a panel with 7 VFD's. Each VFD having its own source, 480V. I have done systems with multiple voltage sources, but this is a new one to me. The reason for this is to have the ability to work one VFD with having to shut all 7 down. My thoughts are there is no way to get the panel electrically safe, unless all the VFD's are isolated some way. Any suggestions?
 
Not sure I understand the question.

Is this a panel containing 7 vfds each with their own 480 volt power sourse to each vfd?

And you question is to make it safe to work on 1 vfd while the others are energized?
 
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