To All:
I need help with an electrical problem with a new shaper. It is a Delta with a 2 HP 220 V motor. The label indicates that it should draw 11 amps. I wired it with 14/3 wire with a twist plug. The shaper starts and runs but if you shut it off and then restart it, It will trip the 20 amp 220 breaker. I have a 3 hp 220 Unisaw that runs off the same plug (not at the same time) with no problem. I have changed the adjustable overload on the magnetic starter from 11 amps to 14 amps with no luck. Does anyone have any idea what I should look at for potential problem. Thanks in advance for your help.
TonyM
Replies
EXACTLY what happens when you try to restart it.
Do you hear the motor hum? Does it turn at all? How long does it take the breaker to trip?
Now repeatable is this problem?
How quick or long between restarts and it will or will not restart?
Is this a reversalble shaper?
Of the top of my head I suspect a motor starting problem.
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A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
Thanks for the quick response Bill.
The shaper will momentarily start a second time. It is a reversable shaper. I don't hear any buzzing. I start the shaper and let it run for 10-15 seconds and shut it off. I wait until the motor completely stops and then try to restart. When I restart, the motor starts to spin for a split second then nothing.
Tony
you may have a centrifugal switch that is sticking.... is it still under warranty ?.
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., wer ist jetzt der Idiot ?
14/3 wire on a 220v motor???
Dave
That is what it came wired with, I just made one a bit longer. My understanding is that 14 ga. is good to 15 amps and this motor is drawing 11.
Thanks
its a little light but the thermal OL was set for 11 Amps..hopefully the cord isn't too long.you may be on to something.
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., wer ist jetzt der Idiot ?
The problem has nothing to do with the overload. It needs to be at 11 amps to protect the motor. You didn't write whether or not the shaper will run under load. If not, there are a few possibilities; The most obvious is you are due a replacement motor. The other could be as simple as a poor connection on either end of the power cord. We've all seen that one. Another culprit could be the reversing switch. It may just need to be exercised a bunch of times - with the power off - to clean the anti-corrosion coating off the contacts.
Let it run a while before shutting it off. If it trips the breaker while running, I suspect the motor.