G
Guybrows
I wired a 3 phase motor for a hydraulic pump up today. Its a 3kw motor. My boss told me to wire it as a Direct online in Delta. I thought maybe it would be better as a Star Delta as the pump would be dry and it may cause high start up current. I belief that a small motor is fine as a DOL. When i turned it on the motor kicked out a load of smoke and the cable started to overheat. The fuse was faulty and didn't trip. I tested mega tested the winding and they were down to 0.02 ohms. Something not right. The supplier says they have never had a faulty motor but I cant work out why a 3kw motor would draw enough current to blow the windings. I am now going to wire the new motor it in star delta just in case but thought I would see if anyone had any ideas on how a motor could blow like this.
Cheers
Guy
Cheers
Guy