Rpc Question

[abrace]

One thing to watch out for when plugging in a VFD is do it like you mean it. Align the plug, then connect it in a quick motion to minimize arcing. The inrush current is insane on a VFD for a fraction of a second while the capacitors charge. The best way it to kill the breaker, then plug it in, then turn the breaker back on.

This is why I am not a fan of using a plug as a disconnect for motors of any significance (or capacitors, the opposite of an inductor)...and also why most plugs top out at around 2HP, or 3HP for the really big ones. You absolutely want to avoid connecting/disconnecting under load. Your idea about killing the breaker to plug in is a good one. However, molded case breakers aren't great at repeated connect/disconnect under load either, but they are going to be better than plugs. The prongs in a plug are not meant for a lot of repetitions with arcing. They won't hold up, they are too thin.