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#198834 - 02/05/11 01:51 PM 4pdt switch for reversing motor
Joetools Offline
New Member

Registered: 02/02/10
Posts: 9
Loc: Alberta
does anyone know where i can find a schematic for wiring a single phase, 120v rvsing motor using a 4pole, dbl throw toggle?

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#198841 - 02/05/11 04:48 PM Re: 4pdt switch for reversing motor [Re: Joetools]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
Basically you just swap the orange and black wire on most of the motors I see.

Use the standard cross connect method on the DPDT sw.



Furnas has a lot of diagrams for doing this with their drum switches and various motors.
See page 5
http://gfretwell.com/electrical/Catalog%204258%20Drum%20Controllers.pdf

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#198844 - 02/05/11 06:16 PM Re: 4pdt switch for reversing motor [Re: Joetools]
Tesla Offline
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Registered: 06/16/04
Posts: 1280
Loc: Sacramento, CA
I've even worked with three-position double-throw switches -- as toggles.

Forward - off - reverse.

Is this a gear-motor?
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#198848 - 02/05/11 07:31 PM Re: 4pdt switch for reversing motor [Re: Joetools]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
That is what the drum switches are good for. We have thousands of them here on boat lifts. They use the garden variety 6 lead induction motor in the top left of figure 1 of the Furnas diagrams I referenced. Those are dual voltage, reversible.
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#198857 - 02/05/11 09:12 PM Re: 4pdt switch for reversing motor [Re: Tesla]
Joetools Offline
New Member

Registered: 02/02/10
Posts: 9
Loc: Alberta
yes, it's a 3pos switch, fwd/off/rvs 4 pole (12 terminal) dbl throw switch. 6 leads coming from motor. boss wants me to use this switch. haven't had much luck looking for a schematic online..?

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#198859 - 02/05/11 10:19 PM Re: 4pdt switch for reversing motor [Re: Joetools]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
Does this help?

This is how the drum switch does it.



I have never seen it done with 4pDT but if you see the connections necessary we should be able to figure it out.
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#198860 - 02/05/11 10:51 PM Re: 4pdt switch for reversing motor [Re: Joetools]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
Try this.

Someone check my logic, it is late wink

120v wired 6 wire motor



Edited by gfretwell (02/06/11 03:51 PM)
Edit Reason: Cleaned up the picture
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#198872 - 02/06/11 12:22 PM Re: 4pdt switch for reversing motor [Re: Joetools]
Tesla Offline
Member

Registered: 06/16/04
Posts: 1280
Loc: Sacramento, CA
My style is to bring L1,L2 to the center, common connections. In the center off position the voltage goes no further.

Then Fwd/Reverse use mirrored connections... with either the Run or Start leads flopped.

But that's not the only way to skin a rabbit.

BTW, with my scheme you don't need so many poles.
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#198873 - 02/06/11 03:16 PM Re: 4pdt switch for reversing motor [Re: Joetools]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
I was just going for no power ti the motor when it was "off". I see where you could do a couple of different solutions to this puzzle.

The real answer is a drum switch IMHO. They are definitely motor rated and pretty robust. Like I said up thread, we have thousands of them down here on boat lifts. That is why I knew about the black and orange wire thing ;-)
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#198877 - 02/06/11 05:25 PM Re: 4pdt switch for reversing motor [Re: Joetools]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9012
Loc: Estero,Fl,usa
I agree Tesla
I redrew the picture to make it easier to see.
You could eliminate the top set of contacts as long as this is a Line/Neutral motor. (wired 120v)
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