Wiring a Phase converter question?

[Hankins]

Wiring diagrams and just don't mix so before I come to a shocking discovery... Need some advice.
Have a 330volt 3ph motor and want to plug it in to my 220v single phase Dryer outlet.
There are 4wires coming out of the cabinet on/off switch
Red Green Black White
Here is the wiring Diagram they show for it

 

[ohski]

I'm guessing that you are saying that the 4 wires are on the output side of the switch so if that is true then...

Color code: Black = T1
Red = T2
White = T3
Green = Ground

Other than that this seems to be pretty simple... maybe print the page out and as you make a connection hi-light it. Just something I do from time to time when I just can't wrap my head around a schematic.

Ski

 

[Stacy E. Apelt - Bladesmith]

Um, you have a 330V 3 phase motor and your dryer is 220V 1phase.
The only way to run that motor on your wiring is with a VFD that has a 330V 3Ph output and a 220V 1PH input. Otherwise ,the two are incompatible.

OK, I took a look at your diagram. You show a rotary phase converter. That will work for a 220V motor, but I don't think it will do for a 330V motor. Perhaps one of the wiring gurus will chime in.

 

[Hankins]

This Phase converter will convert from 220 single ph to 330 3ph I just don't want to blow the darn thing up when i plug it in

 

[Dan Seaver]

Edit- Wow I read that wrong. Go buy a vfd and then I can help you.

 

[cpirtle]

Bladsmth, You can hookup a 3 phase motor to single phase using a static converter, you just lose 1/3 of the rated horsepower.

When you say "4wires coming out of the cabinet on/off switch" do you mean the switch on the phase converter?

Any chance of posting a picture of what you have?

Ultimately, you will probably have 2 wires at your power source, one goes to A on the converter and T1 on the motor, the second goes to C & T2.

T3 goes to B on the Converter.

Clear as mud?

 

[cpirtle]

To be on the safe side though I would leave T3 to b and switch the two others if it runs backwards.

That's the way I'd do it too, but I agree that you can probably use any of the legs.

PS: The wires coming out of your motor should be labeled on the sheathing which leg they are.

 

[Nathan the Machinist]

I've never heard of a phase converter set up like that which uses a 220 input and (I assume) outputs 220, but has a 330 idler motor. Are you sure?

I think the low input voltage will still turn the motor (inefficiently) and the wild leg generated would come out 330 V - too high for a 220 setup.

Perhaps I'm missing something?

 

[Hankins]

Motor says 220 /330 so it can run on both, just the phase is 3ph not single phase

 

[Stacy E. Apelt - Bladesmith]

If the question is ,"Which wires are the L-1 and L-2 wires", it should be the black and red wire. Since you don't know that the person who installed the dryer outlet did it right, use a voltmeter and read across the two. It should read 220V. Then read from one to the white wire. It should read 110V. The other to white should also read 110V. If that all comes out right, the black and red wires are the two to use.

 

[ohski]

If the question is ,"Which wires are the L-1 and L-2 wires", it should be the black and red wire. Since you don't know that the person who installed the dryer outlet did it right, use a voltmeter and read across the two. It should read 220V. Then read from one to the white wire. It should read 110V. The other to white should also read 110V. If that all comes out right, the black and red wires are the two to use.

That will only work if he has a 4 wire setup... old school dryer = hot, hot, and ground. 6 one way half dozen another. The input side is not an issue. It is still single phase.

I wouldn't even worry about the output side the worst thing that could happen is that it will run the wrong way... simple fix... just swap one of the wires (T1, T2, T3) around at the motor.

Ski