Hi guys i need a little help with wiring a Gorton milling machine to a static phase converter. The mill is 2 hp and was wired for 240 volt 3 phase, and is equipped with a magnetic switch and overload heaters my problem is the heater are cutting power to the machine it only runs for 30 seconds or so before the reset button kicks off. Do 3 phase motors draw more amps on static phase converters ? and could i just bypass the heaters all together ?
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wiring a gorton mill
- Thread starter cardman
- Start date
- Replies 5
- Views 1,991
L Vanice
Diamond
- Joined
- Feb 8, 2006
- Location
- Fort Wayne, IN
Check the voltage across each pair of the three legs going to your motor. You will see that they are not the same. If one pair is higher than 240 V, it will cause one of the original overloads to trip. A VFD will provide power much closer to real three phase, and the VFD will have its own overload protection, so then you can eliminate the old overload relay.
Larry
Larry
chip's
Cast Iron
- Joined
- Sep 2, 2002
- Location
- Idaho, USA
VFD really is the way to go. You also get variable speed. Static converters work but they have a lot of drawbacks. Rotary converters are a better way to go. As has been said you always have a phantom phase that is lower voltage. The overloads(heaters)are probably sized for full three phase. You could up the heaters but you would not really be protecting the motor in the best way.
I plan on upgrading to a vfd, but for now ill just bypass the heaters, I mainly work on small parts and soft materials anyway. Thanks
How loud is the head on your Gorton? Mines the same model, runs smooth on high gear but low gear makes a racket especially on the the highest speed. What grease do you use ?
