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Reverse For Split Phase Motor
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10-27-2008, 09:03 PM
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#1 |
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the pipe master
Trade: plumbing, solar
Join Date: Oct 2008
Location: Central, Fl
Posts: 497
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Reverse For Split Phase Motor
I had a customer try to switch the leads around on a 240v franklin electric 1hp submersible pump in an effort to reverse it. He was hoping to dislodge anything that may have been caught in the impeller. I didn't think you could do that with a split phase motor, only 3 phase. I forget the technical name for the motor type. It only has a plastic start cap on the above ground controller box and a solid state switch. Is it possible to reverse a motor of this type by switching the load side leads?
Wouldn't that make your start winding into your run and your run into your start? That would mean the motor would not start right?
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10-27-2008, 09:23 PM
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#2 |
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DGR,IABD
Trade: Electrical; Commercial and Residential Service
Join Date: Mar 2005
Location: Central PA
Posts: 9,680
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Re: Reverse For Split Phase Motor
Reverse the two start winding leads, if you can figure out which two they are.
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10-27-2008, 10:23 PM
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#3 |
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the pipe master
Trade: plumbing, solar
Join Date: Oct 2008
Location: Central, Fl
Posts: 497
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Re: Reverse For Split Phase Motor
2 start winding leads? I only have one for this box. I think the "y" lead is common to both windings. I looked in my motors book and this is a "capacitor start, induction run motor" I think.
I just took some pics of an identical box to the one in the field.
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Plumber, Repiping, Replumbing, Leak Detection, Solar Water Heater, Polk County Plumber, Lakeland Plumber, Winter Haven Plumber |
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10-28-2008, 06:11 PM
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#4 |
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DGR,IABD
Trade: Electrical; Commercial and Residential Service
Join Date: Mar 2005
Location: Central PA
Posts: 9,680
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Re: Reverse For Split Phase Motor
You can't reverse that one, since the start and run windings are not in the control box separately.
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10-28-2008, 06:42 PM
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#5 |
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Handle It!
Trade: Everything The Union Guys Do Not Want To Do
Join Date: Feb 2008
Location: Brooklyn, NY ~ Haverford, PA
Posts: 9,383
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Re: Reverse For Split Phase Motor
Compressed air IS the solution!!
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10-28-2008, 07:11 PM
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#6 |
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the pipe master
Trade: plumbing, solar
Join Date: Oct 2008
Location: Central, Fl
Posts: 497
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Re: Reverse For Split Phase Motor
We replaced the pump today. I was pretty sure that he couldn't reverse it. He was told he could from someone on the internet. It wouldn't matter if he did, as the pump has an auto reverse built in if it becomes blocked or seized.
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10-28-2008, 09:25 PM
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#7 |
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Service & Repairs
Trade: Electrician
Join Date: Dec 2006
Location: Rahway, New Jersey
Posts: 3,998
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Re: Reverse For Split Phase Motor
One winding will have less resistance than the other. Off hand I do not remember which one will be your start winding. Good luck.
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10-28-2008, 09:50 PM
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#8 |
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the pipe master
Trade: plumbing, solar
Join Date: Oct 2008
Location: Central, Fl
Posts: 497
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Re: Reverse For Split Phase Motor
The start would have less wouldn't it?
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Plumber, Repiping, Replumbing, Leak Detection, Solar Water Heater, Polk County Plumber, Lakeland Plumber, Winter Haven Plumber |
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