[Paul S.]

anyone have any ideas on what is the best way to run a 3 phase motor on a 2 phase or single phase system?

 

[John]

http://www.electriciantalk.com/f28/3-phase-motor-single-phase-34487/

 

[BBQ]

Do you really mean two phase?


As far as single phase you can usually use a 3 phase VFD supplied by single phase to run a 3 phase motor.

 

[Rollie73]

2 phase:001_huh::001_huh:???

 

[bobelectric]

Shop for a new motor.

 

[nrp3]

Provided the vfd is sized correctly. A phase converter or roto phase may be an option depending on the machine and controls. Looking into this for my pet food customer who really needs a new service. 200amp single phase doesn't go too far when you start adding lots of these set ups.

 

[brian john]

2 phase:001_huh::001_huh:???

Two Phase 5-wire, I believe exist.

 

[FlatRateGator]

Two Phase 5-wire, I believe exist.

Yeah but it's hard to come by... I think downtown Philly is the last 2-phase hideout?

 

[ponyboy]

Two Phase 5-wire, I believe exist.

indeed it does

 

[John]

Two Phase 5-wire, I believe exist.

Big Red will be to confirm his......I believe Philadelphia still has some 2 phase services.

 

[denny3992]

Yeah but it's hard to come by... I think downtown Philly is the last 2-phase hideout?

Yes sir ask don- resq capt

 

[jefft110]

Yeah but it's hard to come by... I think downtown Philly is the last 2-phase hideout?

http://www.ablegroup.net/3phase-2phase.htm

 

[Paul S.]

Thanks

Thanks for the input; appreciated the link regarding 3 phase setups most. My impression is that sometimes VDF's can create problems with some motors. (He has a 30 A, 3 phase, 10 H.P. 200 Volt motor on an air compressor he bought.) I'm not sure if that would apply to this motor but, as far as I can tell, to be safe, it would probably be better if he were to just get another compressor.

 

[Rollie73]

Two Phase 5-wire, I believe exist.

Yeah but it's hard to come by... I think downtown Philly is the last 2-phase hideout?

indeed it does

Big Red will be to confirm his......I believe Philadelphia still has some 2 phase services.

Hmmm......learn something everyday:thumbsup: Something else to do some reading up on.

 

[nrp3]

I try to train my customers to ask before they buy stuff. I didn't realize you could do the vfd thing until I asked here and got some good advice. These guys bought a new mixer that had a vfd set up for 480v 3ph. All he had was 240v 1ph. Called up the manufacturer of the vfd and told them what I had and they sold us an upsized version to do what we needed. Programming it wasn't to hard either and works good. They were looking at some additional equipment that didn't lend itself well too a vfd because of the controls so I priced a rotophase. Tried to make the point that it wouldn't take long before we would run out of capacity on the single phase service and installing these converters or larger vfds might exceed the cost of a proper service upgrade.