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Joined: Oct 2004
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Bingo!!! Also, even with the motor stopped, reversing it causes the 20 amp SP breaker to trip ? Before, & after the control was changed. Replace the wiring!! You've got a short to ground somewhere! And for goodness sakes, don't use NMB!! ![[Linked Image]](https://www.electrical-contractor.net/ubb/eek.gif) As a former owner of horses, I can tell you that in addition to horses liking to chew on anything, their manure and urine are highly corrosive and will rot out most anything. I'd suggest running pvc conduit with THWN from the controller to motor. Be sure to anchor the ends to a post to protect from horse contact. Good luck! edited html [This message has been edited by mxslick (edited 08-10-2005).] [This message has been edited by mxslick (edited 08-10-2005).]
Stupid should be painful.
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Joined: Dec 2004
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It has been a while since I have tinkered with these, but I used KB drives before.
Don't most Dc drives have 2 fuses in them?
One for the input supply and one for the output to the motor?
Why would the Sp20 breaker trip, with a short on the output?
Or am I missing something?
Dnk........
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Joined: May 2005
Posts: 178
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Also, even with the motor stopped, reversing it causes the 20 amp SP breaker to trip ? Before, & after the control was changed. "That was an important piece of information, don't you think?" -- Lieutenant J.G. Daniel Kaffee, A Few Good Men ![[Linked Image]](https://www.electrical-contractor.net/ubb/smile.gif) Dnk, that controller has a 15A line fuse built in, but no output fuses. Since the 20A CB opened instead of the fuse, I'll guess a little further that the line and neutral are reversed somewhere.
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Joined: Dec 2004
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No doubt John, that ones got alot of different things going on.
Dnk........
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Joined: Jul 2002
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Posted for Alan Belson: Wrong again, sidelined by modern technology! I thought the horse had to work, as in a treadmill. Here's a heavy horse, ( a Percheron ), operating a one horsepower(!) treadmill. It's powering an integral thresher to separate wheat grain from the straw. Late 19th C..
Man at left feeding the sheafs, man at horse's head with the brake, owner at right handling the power.
Pic taken last weekend. ![[Linked Image]](https://www.electrical-contractor.net/mt/ABA4.jpg)
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Joined: Mar 2004
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Well...here's the rest of the story.
After returning from vacation I went to look at the Horse Walker again.
Found that when Mr Farm Owner poured the concrete slab, the conduit He had stubbed up was left too high, & when they lowered the base onto the slab, it pinched the conductors just enough to make the motor unresponsive to the control, and when reversed, the short was great enough to trip the circuit breaker.
New ditch, conduit, & carflex replaced NMB, & all is good.
Never shorted enough to chirp a continuity tester, but was able to see a short with a meter.
I hadn't seen a motor act this way before, but the one thing I knew, without a doubt, was that Someone here would nail it quickly.
Thanks to ALL who replyed.
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