How to wire 4 pole reversible single phase motor 2

[controldude]

I'm trying to figure out how to wire a motor so that it can go either forward or reverse via switch and contactor. I am much more familiar with wiring 3 wire motors. Basically i'm confused on where to wire the neutral, and my hot lead. Thanks in advance!

Here is the motor info:

http://www.groschopp.com/products/index.php?act=details&num=45586

 

[ScumPunk]

Hi, Controldude,
I must admit I'm used to 3 phase motors myself, but as far as I'm aware, on a single phase motor, you can connect neutral and "hot" either way round to the connections marked "Line".
For reverse operation, your contactor looks like it needs to swap the blue and yellow connections. So with blue connected to red and yellow to the cap/line terminal, it will rotate CW. for CCW rotation, connect blue to the cap/line, and yellow to red. That is how I read the connection diagram attached to the motor data posted.
If I'm wrong, I'm sure one of the more experienced guys here will be along shortly and correct me...
Regards,
Mort

 

[roydm]

Mort is correct, just make sure you connect the Blue/Yellow wires before you apply the power otherwise it will smoke.
I don't think it matters which one you make Hot however my choice would be to connect Hot to the side with capacitor.
I note there are 2 different motors on one drawing, if you are using the AC65 wire the Neutral to Blue and Hot to Brown or Black
Regards

Roy

 

[ScumPunk]

Hi,
Roy - thanks for the confirmation. can you explain why you would connect Hot to the cap side? Or is it a convention thing?
Regards,
Mort

 

[controldude]

Thanks for the help guys. That makes sense to me Mort. There is not a brown wire, so it is the top schematic (non AC65). My only question now is what I do with the black wire from the motor. I think the cap is internal on this motor so I'm not really even sure why they provide this lead.

In addition to the 4 wires (red blue yellow black) there are 2 more black wires coming out of this square box which I assume are for a spare capacitor. Do I just wire one of these leads to the black wire then?

nick

 

[waross]

Assumptions may be hazardous to your health. Twoextra wires may mean several things.
1> You may have the wrong diagram for the motor.
2> The wires may be a capacitor.
3> The wires may be a thermal protector.
Wiring a capacitor in place of a thermal protector or vice-versa is an invitation to disaster.
If you have to ask about the spare wires rather than testing, then the best advice we can give you is to hire a professional.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[controldude]

Ah the 2 extra black leads are the actual capacitor leads whereas I thought they were provided to add a second cap (as per the illustration). I made the connections and everything is working well.

Now all I have to do is design the control circuit. : )

 

[roydm]

Nick,
There is no real reason for wiring the capacitor to hot side, just my personal preference. It's a pretty poor schematic (in fact they can't even call it that), how much easier it would be to understand if they showed the internals.
Bill,
Instead of shooting him down, explain how to figure out what the wires are e.g. a few simple Ohmeter tests, it's pretty easy to tell the difference between a capacitor that will charge and a thermal protector that's a short. The coils will be a few Ohm, depending on the motor size of course.

Regards

Roy