I have to hook up a 50hp 480v motor, the schematic is gone. The 6 leads are what's throwing me. I can make out on the tag that the motor is dual voltage. It was previously fed with 480, when it was move instead of leaving the split bolts and cutting the feeders they cut the leads instead. The six leads are numbered 1,2,3,6,7,8 or it's 1,2,3,7,8,9. I can't tell if the 6 is a 6 or if it's a 9.
None of the 6 wires were connected to each other, even though they cut the leads to remove the motor they'd have no reason to undo connection in the peckerhead that were not attached to the feeders so I'm ASSuming 1 and 7 would go to L1, 2 and 8 to L2 and 3 and 9 to L3, I'd really hate to let the smoke out of this motor if I'm wrong.
Thanks guys. Tesla, how have you been? Haven't "talked" to you in ages.
Tesla, that's what I was thinking, my father in law who's a retired maintenance electrician said the same thing. The customer swears this motor was running at 480v, I went to where they said it was hooked up and 480v is the only thing there. So either they mixed the motors up somewhere or there is a way to wire that motor for 480v with the wires I have in the peckerhead. My FIL said in 30 something years he has never came across a motor where you could run it at 480v with the wires that are in the peckerhead.
Hi, i might be confusing the issue here a little but if the 6 leads were disconnected it implies(UK) that the motor was fed via a star/delta (wye/Delta) starter,, if so if you wire it to run in wye you will have overheating problems and if in delta excessive starting load problems,,
#193438 - 04/01/1005:24 PMRe: 3 phase 480v motor with 6 leads and no schematic