On Tue, 02 May 2006 20:17:52 GMT, Richard Ferguson wrote:
Thanks guys. The start cap on the side seems to be the easiest thing to
see, and this motor is just round, so it must be three phase, and I need
single phase.

The price is not so cheap that I can justify buying it and replacing the
motor and controls.

Good thinking, but giving giving the owner an offer that si
acceptable to you.

I think that I am just going to have to buy a new compressor, with a
220V single phase motor. Ingersoll Rand makes the SSL5L5, their low end
5 HP compressor, which I think would meet my needs, basically to run die
grinders at close to 100% duty cycle. It is rated at 18 ACFM at 40 psi.

I would not give up on the idea of finding a good used deal, too quickly.

i

Richard



Richard Ferguson wrote:

Someone is offering a Quincy compressor at a reasonable price, but he is
not sure if it is single phase or three phase. I need single phase. The
tag on the motor does not seem to help (he emailed me a close-up photo).
It is dual voltage, 208-230/460. The problem with the tag is that it
has a bunch of numbers, but they are not labeled as to what the numbers
are. :-(

Could I take an ohmmeter and figure it out? I would guess that a three
phase motor would have equal resistance on all three combinations of the
phases, while a single phase with neutral would have different
resistance, probably low between the two hot leads and higher between
hot and neutral. Green should be open relative to all the other wires,
no matter the phase count.

Is there another solution?

Richard