single phase to three phase - Electrician Talk - Professional Electrical Contractors Forum

escinola · 02-19-2009, 04:16 PM

hey, fellows:
i had run into a problem, as customer had single phase at there bussiness.Now, they wanted 3 phaseto use just for their walk-in refrigeration of 23.6amp on 208(230)volt, and other walk-in freezer as total of 11.8 on 460 volt. As i try to get a step up transformer,but i could not get up to 460 volt.Any idea without phase convertor, since this is relate to hermertic compressor

help me out

BryanMD · 02-19-2009, 04:25 PM

cheaper to have the refr sales co take back their equipment and replace it with what matches the power on site.

escinola · 02-19-2009, 04:35 PM

somehow, the owner rather to spent the money on electrician,since they bought those equipments really cheap. seem like i got to get more

.Or any A/C tech can change out the compressorto be 208,instead of 480.Andwt is the risk.thanks fellow

BryanMD · 02-19-2009, 04:40 PM

Quote:

Originally Posted by escinola

somehow, the owner rather to spent the money on electrician,since they bought those equipments really cheap. seem like i got to get more

look close... what aspects of the equipment actually uses the 480 3P?
If it isn't brand new (and even if it is) change those items.

escinola · 02-19-2009, 05:02 PM

that was the outer piece of the freezer,that was the compressor ,--BryanMD--

electro916 · 02-19-2009, 11:11 PM

Compressors can be changed out to any voltage you would like. Just make sure all the other start components are rated at 208/230 volts. Compressor change-out takes about 6-8hrs, depending on tech, with no risk involved, as long as the system is not "open" for a long period of time which would allow condensation to build up in the refrigerant lines. Condensation+refrigerant= Acid which will burn a compressor out in no time.

Im not an AC/Refrigeration tech, but I helped many of my co-workers who are with compressor change outs.

taoman8 · 02-22-2009, 01:05 PM

I do a lot of restaurant electrical (all 3 phase), but I don't think it can be done without a phase converter. Better to change the equipmet to single phase.