E. Bobicki
Cast Iron
- Joined
- Sep 10, 2004
- Location
- Oakville, ONT, Canada
So I scored a cart full of stuff yesterday at work, 3 motors, and 4 rotary vane vacuum pump/motor units. Halfway through the day the building electricians came looking for me cause they got wind of the stuff that was thrown out. I reluctantly gave them the 3/4 HP 1P and 1HP 3P units (not that I can't get them back later when I need them) But the third unit a brand new Baldor 3HP motor they said is useless and I might as well throw it out right there. They said it will draw over 200amps on startup and they dont even have the power in the building to run it(which is bull, we have at least 400kW of furnace power in our lab alone) and it would blown the 100A panel in my house off the wall. I said "yeah but you can get inrush limiters to soft start the motor" And they said it would be way too expensive to get one made for this motor so dont bother.
So to the gurus here I ask what is the practical rundown on this beast. It draws 14A running on 220V, I'd imagine it could draw as much as 100A on startup. Would it be feasible to have a series resistance bank(capable of the load) that is switched out of the circuit via a SSR after a delay to get the motor up to speed while limiting the starting amps to say double rated. Would this even allow the motor to start? Is there a standard way of doing this? Is this unit junk, or does anyone want it?
So to the gurus here I ask what is the practical rundown on this beast. It draws 14A running on 220V, I'd imagine it could draw as much as 100A on startup. Would it be feasible to have a series resistance bank(capable of the load) that is switched out of the circuit via a SSR after a delay to get the motor up to speed while limiting the starting amps to say double rated. Would this even allow the motor to start? Is there a standard way of doing this? Is this unit junk, or does anyone want it?