Sorry to intrude on a PM subforum, but I was curious if someone could reference their PM-935-TV motor plate - specifically the current rating at corresponding 220V single phase. I have a 'different' 935 nominally rated 3HP = 2.2KW which is stamped 20A at 220VAC. Its tripping out 15A breakers on no-load startup & now I think I know why.
Help me understand this. If I divide my watts by line voltage I get something around say 10-12A (I'm in 240V territory). But that must be something like constant current right? Is the added current headroom from that to 20A in my case, to accommodate the capacitor thingy's higher demand spike at the beginning & that's maybe why things go silent? So now that it appears I have a new panel upgrade headache to deal with, should I be providing for say 25A or 30A on the breaker to add headroom to 20A? I'm pretty sure I'm limited to 40A on the entire sub-panel & would prefer not to mill in the dark :/
What sort of line duty vs motor spec current are you folks running?
Help me understand this. If I divide my watts by line voltage I get something around say 10-12A (I'm in 240V territory). But that must be something like constant current right? Is the added current headroom from that to 20A in my case, to accommodate the capacitor thingy's higher demand spike at the beginning & that's maybe why things go silent? So now that it appears I have a new panel upgrade headache to deal with, should I be providing for say 25A or 30A on the breaker to add headroom to 20A? I'm pretty sure I'm limited to 40A on the entire sub-panel & would prefer not to mill in the dark :/
What sort of line duty vs motor spec current are you folks running?