Motor disconnect and sizing

Jraef said:
Personally, I have experienced only one rectifier failure in my 30+ years of focusing on VFD projects, and I have never once experienced a complete line-to-load meltdown/short. Nor have I ever heard of one. So I think the new rules are silliness because they are theoretical, not experiential.

But my opinion is meaningless…
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try hooking up a drive backwards. I've seen it. Exploded.
 
was a really simple mistake with one of my guys adding a drive to a fan on a 40-ton RTU. He got the line / load reversed on accident. Bang. You only get 1 smoke test.
 
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