I have a static converter for 5 or 7 hp I think ---had it on our die press at the other place til we got the 3-ph. hook-up. Might also be one on my big shaper ---- its 3-ph. and 5 (I think hp) and 220-v. somebody at the school put it on since they only had single ph. in the building.
I see the 2 different 3-ph. systems, ---- 1 is 4 wire and the delta is 3 wire.
The seller said the place he bought the sb from turned it on and ran it to show that it did work, so I only have his word, but he seamed like a great guy so I will assume it is a good motor.
Its only 1 horse but looks like an elephant sitting on top of the lathe.

"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands."