Joe Worsley wrote:
>
> Chris Prugh wrote:
> >
> > Joe,
> > You wrote:
> > <snip>
> >
> > It sounds a little strange if these wires are where the power is to be
> > connected and goes to the switch. Is it possible that you have a 3 phase
> > motor?
> >
> > You should see a 3 and a zero with a shash bar through it on the info
> > plate if it is. There may just be a line saying phase and a 3
> > stamped in it. These are standard colors for a 3 phase circuit and the
> > green would be ground. How big of a motor (HP) is it.
> >
> > I went out and checked the plate (the only one with recognizable characters
>on it)
> > It states, quite clearly I might add: 3 Phase Induction Motor
> > below that are various ratings as follows:
> >
> > Volts 200 200 220
> > Hz 50 60 60
> > RPM 1420 1700 1720
> > Amps 3.8 3.4 3.3
> >
> > I can't find a horsepower rating anywhere (at least in english) Thanks for
>your help ....
> > now, how can I wire it to my existing 220 (or can I?)
> >
> > Thanks again
> >
> > Chris Prugh
> > 72 Spitfar
> > Morgan Hill, CA
>
> Chris,
>
> I would say you are out of luck on the motor. There are ways to do it
> but it's not practical for you.
>
> Your best bet is to buy a repalcement motor. I can't remember how to
> do a approximate conversion to HP from the volts and amps.
>
> I believe that 1Hp is about 745 watts roughly. But in a three phase
> motor I don't know. I would say that it is about a 1 to 1 1/2 hp
> motor. The equivalent single phase 220v motor would be more as the 3
> phase motor has more starting torque. I would guess that you need at
> least a 2hp motor or possibly a little larger. Don't forget that it is
> a slow speed motor. You can find a compressor rated (high starting
> torque) with 1725 RPM very easy. A motor shop could probably tell you
> what you need.
>
> I can't find my National Electrical code book that has all the info in
> it. Can anyone out there give him a better estimate???
>
> You might have a real gem there. It could be a two stage compressor
> with a starting pressure release. Look at it closely and see if there
> appears to be any lines runing from one cylinder to the other or a
> clutch on the compressor pully shaft etc.
>
> If it is a commercial two stage type it wouldn't need a big of a motor
> due to the low starting requirement. Try to spin the compressor and
> see if you get any pressur out of it wit the line to the tank loose.
>
> Good luck and post me back if I can help you more.
>
> Joe Worsley
> 80 TR8
> 72 TR6
> Tupelo, MS USA
After finding my Nat Elect. Code Book and eating dinner (more important
than book) it looks like you have a 1hp 3 phase motor.
If it is a 1hp motor I would almost bet that you have a two stage
compressor with easy strating capability.
Check it out and talk to a motor shop. If it's new you might can work
out a swap. three phase moptors are cheaper than single phase motors as
they don't have to be a big so you will find a little added booty will
probably be required even if it is a new motor.
Joe Worsley
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