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#198834 - 02/05/11 05:51 PM 4pdt switch for reversing motor  
Joetools  Offline
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Joined: Feb 2010
Posts: 10
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 08:48 PM Re: 4pdt switch for reversing motor [Re: Joetools]  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,123
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.

[Linked Image]

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



Greg Fretwell

#198844 - 02/05/11 10:16 PM Re: 4pdt switch for reversing motor [Re: Joetools]  
Tesla  Offline
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Joined: Jun 2004
Posts: 1,273
Sacramento, CA
I've even worked with three-position double-throw switches -- as toggles.

Forward - off - reverse.

Is this a gear-motor?


Tesla

#198848 - 02/05/11 11:31 PM Re: 4pdt switch for reversing motor [Re: Joetools]  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,123
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.


Greg Fretwell

#198857 - 02/06/11 01:12 AM Re: 4pdt switch for reversing motor [Re: Tesla]  
Joetools  Offline
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Joined: Feb 2010
Posts: 10
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..?


#198859 - 02/06/11 02:19 AM Re: 4pdt switch for reversing motor [Re: Joetools]  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,123
Estero,Fl,usa
Does this help?

This is how the drum switch does it.

[Linked Image]

I have never seen it done with 4pDT but if you see the connections necessary we should be able to figure it out.


Greg Fretwell

#198860 - 02/06/11 02:51 AM Re: 4pdt switch for reversing motor [Re: Joetools]  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,123
Estero,Fl,usa
Try this.

Someone check my logic, it is late wink

120v wired 6 wire motor

[Linked Image]

Last edited by gfretwell; 02/06/11 07:51 PM. Reason: Cleaned up the picture

Greg Fretwell

#198872 - 02/06/11 04:22 PM Re: 4pdt switch for reversing motor [Re: Joetools]  
Tesla  Offline
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Joined: Jun 2004
Posts: 1,273
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.


Tesla

#198873 - 02/06/11 07:16 PM Re: 4pdt switch for reversing motor [Re: Joetools]  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,123
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 ;-)


Greg Fretwell

#198877 - 02/06/11 09:25 PM Re: 4pdt switch for reversing motor [Re: Joetools]  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,123
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)


Greg Fretwell

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