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> OT: Phase Conversion, For running a compressor
McMark
post Jan 31 2007, 02:58 AM
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I have a 7.5 HP vane type compressor that I am researching how to run on single phase power. Swapping to a single phase motor is not an option. Anyone have any knowledge of sizing a phase converter? It looks like I can find rotary phase converters that say 7.5 HP for around $600. But I don't know if this is one of those situations where I really should be getting a 10 HP converter for the 'extra overhead power'. Advice?
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r_towle
post Jan 31 2007, 02:16 PM
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Im no electrical wiz, but...

You can simply get an additional 3 phase motor, mount it on the floor.
Start that motor with a single phase, once running you use that as a convertor for the compressor..

A good industrial electrician can explain it...
It is the cheapest way to go, just requires a bit of work on the slave motor to get it to start. It just gets re-wired somehow...
I had one in my shop many years ago...much cheaper than a phase convertor,,,,yet its a phase convertor...go figure...just not in a pretty box.

Rich
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