Single phase 240v motor wiring

[paratim]

Thanks Marvo. I forgot to say, since I wired as you have shown in your diagram, yes it does run clockwise, but also I can hear what I think is the centrifugal switch opening and closing. This wasn't apparent before. Also I am unable to open the attachment, the forum says it's invalid. Thanks again, Tim.

 

[Marvo]

I've reattached the new drawing, hopefully you'll see it now.

 

[paratim]

Thanks Marvo. I wired it as per your anti-clockwise diagram and it blew my RCD. To be honest I'm not sure which wire corresponds to which winding. As you can see in the picture below, one port on the casing has blue going to Z2/W2, black going to U2 and yellow going to V2. The other port has white going to V1 and black going to Z1/W1. it ran anti-clockwise in this configuration with live on U1 and neutral on Z2/W2 but struggled and kept tripping. Also like this I could not hear the centrifugal switch actuating. Do I need to rearrange the winding wires?

 

[Marvo]

You haven't taken out the two brass links and reorientated them as I showed on my drawing. Also where have you connected the Neutral? I assume the black wire bottom left of your photo is the live from the safety reset.

 

[paratim]

That last picture is of the original configuration and yes the black to U1 is from the reset switch. Top 2 red go to run cap. and bottom 2 red to the start cap. I tried it exactly as your anti-clockwise diagram showed with the connecting bars horizontal, but it tripped the RCD. I can only assume the wires to the connecting block are wrong. I don't know which wire corresponds to which winding etc.

 

[Marvo]

Where did you have the neutral connected when the RCD tripped?

 

[paratim]

V2 as your diagram showed (last message should read vertical not horizontal)

 

[Knobhead]

That last picture is of the original configuration and yes the black to U1 is from the reset switch. Top 2 red go to run cap. and bottom 2 red to the start cap. I tried it exactly as your anti-clockwise diagram showed with the connecting bars horizontal, but it tripped the RCD. I can only assume the wires to the connecting block are wrong. I don't know which wire corresponds to which winding etc.

This is where you need test gear and a good working knowledge of motors.

Many electricians can’t get reversing a single phase motor right.

 

[Marvo]

For the wires that disappear inside the motor identifying which wire is which is not an easy task, usually they're marked with a collar at the terminal block. If you've not altered any of those wires then they should be on the correct terminals, as there's no reason to have to change the terminals the winding wires are connected to under normal circumstances.

I'm inclined to think it's the end of your road if the RCD is tripping. Please call it quits at this point, the RCD only trips if there's a fault present and that particular type of fault can cause the body of the motor to become live and can give you an electric shock.

If your neutral was connected to V2 as you say then the next step is to remove the power connections and insulation test the motor windings and capacitors which you can't do without test equipment. I'd also do a continuity test on the windings and reference the results against the manufacturers specs at room temperature to rule out tracking across the windings which isn't uncommon once overheating has occurred. You stated earlier that there has already been overheating and smoke from the motor so I'm guessing the damage has already been done. If I were you I'd take it to a motor repair shop or rewinders and ask them to bench test it and if necessary quote on the repairs.

 

[Knobhead]

I’m surprised you stuck at this so long Marvo.

A good electrician on the job would have had this sorted in ½ an hour.

 

[Spoon]

I think Marvo have done a fantastic job on this post and Im sure the OP is grateful for all his help but has not seen the 'Thanks' button on the bottom left of his posts...

 

[Knobhead]

I'm not saying Marvo made a bad job of it. Some people are beyond help, added to which I will not help with DIY.