I found a (very) surplus 3-phase motor today. I got a real good deal on it because the nameplate the seller and I read the data off said it was a 50Hz 5hp 2850 rpm motor, and he didn't believe me when I told him it would run fine on 60Hz power. Loading it in my car, I noticed *another* nameplate. I have never seen 2 nameplates on an electric motor before! This one said 60Hz 7.5hp 3450 rpm! The motor is a Baldor, has that ISR sticker on it (inverter surge rated), and has a spec number which doesn't work on the Baldor site: 36H928-0194G1.
I want this motor for an idler for a phase converter. The largest load motor it has to start is 3hp. This motor is pretty small physically for a 7.5hp motor. It has a 182TZ frame. No shorts to the case. All nine wires were disconnected so I didn't check all 72 lead-leads because the price was so right. I'll spin it up and see, if it sparks it will be an "oh well". I was looking for a 5hp 3ph motor for use as an idler. I seem to have found a 7.5hp of sorts, a kind of wimpy one. I don't care as long as it will work. But I don't want to spend a lot of effort if this motor has something inherently non-idler about it.
Grant Erwin Kirkland, Washington