This 7.5 hp three phase motor goes on one of my many industrial air compressors. I tested it off my self built test circuit and it made a bad sound so it sat for a long time waiting for a rebuild. I removed the bell ends today and one bearing is diffently bad, removing the junction box cover showed a group if wires welded to the cover from a tiny gole in the rubber end cover.
Holy moose nuggets...that's a serious air compressor motor! Do you use that to inflate the kids basketballs and pool floats?
7.5hp is still on the small side industry wise, even my 55cfm 120gallon tank 2 stage with a 10HP 3ph is still considered small.
We have 3x 600hp motors upstairs on our compressors for work. They make the ground shake when they start up, pulling 1600A of current.
Geez, it's bad enough when the mag. contactor shuts on mine sounds like a 30-06 going off. Obviously not a soft start item.
Ours has a start winding in it, and it shakes the floor and makes weird noises on start up. It's that noise that says man that's a lot of current being pulled!!
