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Phase Converter Help

10/12/16       
Ronnie Member

My pattern maker buddy is getting ready to retire and wants to keep a few machines in his garage.

He has a disc sander with a two hp motor and an oscillating spindle with a one hp motor that he wants to keep. He is on 208 three phase power now.

What do I need to know about rotary phase converters to help him get going? Can he run both at one time on a single converter, or will he have to run one at a time?

Thanks,
Ronnie

10/13/16       #2: Phase Converter Help ...
Dave Edgerton  Member

we have a 7.5 hp rotary with a phasequest starter and I can run up to 22 hp. The trick is to start one machine at a time. Most of the machines we have are 7.5 0r 5 hp 3ph and al run well. Its the startup on a machine which has the biggest load. Once going there is nothing to it. Our phase converter runs all day long 5 days a week all year.

10/13/16       #3: Phase Converter Help ...
Bill Member

It may be cheaper to swap out the motors.

10/13/16       #4: Phase Converter Help ...
David R Sochar Member

I have three machines on one converter.

All I did was call the guys at Arco, and they told me what I needed, how much it cost, and I picked it up the next day. Have your motor info when you call, and they can size the converter properly.

I did have an electrician hook it all up and it has worked flawlessly for 7 years.

Arco Phase Converters

10/13/16       #5: Phase Converter Help ...
Bruce H

It all depends on how much you want to spend. You can make a converter easily enough. Your "slave" motor needs to equal or larger than the HP of the largest motor you want to run. The trick is to get the "slave" motor running. You can do it with a rope and pulley, a bank of capacitors or you can purchase a unit complete. In any case the "slave" motor just sits there running. producing the third leg you don't have. In general you can run three times the HP load of the slave motor but only start a motor of equal or lesser HP.

10/13/16       #6: Phase Converter Help ...
rich c.

Also look at Variable Frequency Drives (VFD). You get one for single phase in, 3 phase out, plus you get a variable speed this way. At the hp sizes you are talking, they are pretty cheap.

10/13/16       #7: Phase Converter Help ...
Keith Newton

I started to suggest the VFDs too, but if these are older motors, they might not be compatible. I'd check with a good electrician well familiar with them before spending the bucks, because the supplier may not let you return them, if you tried and failed.

10/16/16       #8: Phase Converter Help ...
Dan / drbwoodworks

Call the guys at North America phase converter , really nice , super friendly and they their stuff . Besides they also sell great equipment. They know all machines and the best way to get 3 phase power to them .


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