I am pretty cold to that idea. I would not trust the contactor to disengage and remain disengaged. To me a disconnect is a manual switch on the circuit itself.
I could say, hey, browse to www disconnects.net and uncheck the box for your circuit and my computer will de-energize and lock it out for you.
Yeah, perhaps in a hundred years.
But I think a disconnect is a switch that I physically open and lock open, not some remote control button.
Now don't get me wrong, and emergency switch like this is okay. But if the in sight disconnect is for me to work on it, I want to see that the contacts are physically open.
Was that Scott who once shut down a power plant by accidentally shorting a control wire?
