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Forums13
Topics7,385
Posts40,939
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Most Online3,137
Apr 9th, 2026
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Joined: Mar 2013
Posts: 15
stranger
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stranger
Joined: Mar 2013
Posts: 15 |
Lookin for some input or paperwork for a erl Westinghouse 74 vintage. Elevator runs too fast. Trying to figure what makes the voltage stops increasing once it gets to speed
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Joined: May 2011
Posts: 487
addict
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addict
Joined: May 2011
Posts: 487 |
Is the car running away? Have you adjusted HS on the regulator?
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Joined: Feb 2013
Posts: 800
old hand
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old hand
Joined: Feb 2013
Posts: 800 |
try checking the Zener Diode.
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Joined: Jan 2014
Posts: 141
member
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member
Joined: Jan 2014
Posts: 141 |
Not sure if this helps. On the older versions of the ERL controllers low insulation resistances to ground on the main loop circuits could cause overspeeding in one direction and not being able to properly compound
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Joined: Jan 2014
Posts: 432
addict
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addict
Joined: Jan 2014
Posts: 432 |
check the 6 relays in the motor field circuit. low motor field voltage will cause car to overspeed
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Joined: Mar 2013
Posts: 15
stranger
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stranger
Joined: Mar 2013
Posts: 15 |
Tried adjusting hs pot and nothing, I'm gettin over speed in both directions, but what's weird is it randomly worked absolutely perfect for like two hours and right before I was going to turn it loose it permanently crapped out. We've had this on contract for five years and it never ran that good, don't know if that throws any other signs up. Thanks guy
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Joined: Jan 2014
Posts: 736
old hand
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old hand
Joined: Jan 2014
Posts: 736 |
If the HS pot does not change anything you could have a Motor Field problem or a bad SCR or circuit Board Controlling Generator Field. Have you checked Standing, running, & forcing voltages? If you have more then one car, check and compare the Ohms in Motor Fields. Have you checked with a Tachometer how fast it is really going? Make sure you have no grounds in Loop Circuit.
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Joined: Dec 2012
Posts: 8
stranger
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stranger
Joined: Dec 2012
Posts: 8 |
Sounds like it might be shored look circuit to me look for shorted brush rigging's be be 10 meg of higher to ground.
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Joined: Aug 2011
Posts: 563
addict
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addict
Joined: Aug 2011
Posts: 563 |
If the HS pot does not change anything you could have a Motor Field problem or a bad SCR or circuit Board Controlling Generator Field. Have you checked Standing, running, & forcing voltages? If you have more then one car, check and compare the Ohms in Motor Fields. Have you checked with a Tachometer how fast it is really going? Make sure you have no grounds in Loop Circuit. Hey Rolly, what do you mean by forcing voltages? Which area?
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Joined: Dec 2015
Posts: 1,766 Likes: 11
ElevatorPractitioner
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ElevatorPractitioner
Joined: Dec 2015
Posts: 1,766 Likes: 11 |
He's talking about the motor field voltage/current. Forcing is full field.
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Joined: May 2011
Posts: 487
addict
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addict
Joined: May 2011
Posts: 487 |
Does the car run fine (speeds are the same in both directions) on hand?
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Joined: Aug 2011
Posts: 563
addict
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addict
Joined: Aug 2011
Posts: 563 |
He's talking about the motor field voltage/current. Forcing is full field. Ah ok I understand now. I only ask as I haven't come across anyone in our parts who call it this, but just call it the pattern circuit s curve and loop circuit build up.
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HW PM
by Chris, January 13
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