Definitely something to think about.
Kim
> -----Original Message-----
> From: Keith Turk [mailto:kturk@ala.net]
> Sent: Saturday, October 13, 2001 3:40 AM
> To: Kim Knapp; Shop
> Subject: Re: OK, here is what my 208v really is:
>
>
> Kim.... I have three phase power in a small concrete plant and it
> really is
> the cheapest power availible once you get it paid for..... I only use it
> on the batch plant.... the air compressors ( two of them ) and
> the Vibrators
> use 220v .... after 5 yrs I have lost several compressor
> heads.... but none
> of the electrical motors.... I think your fine....electrically....
>
> Your statement about rare air due to Altitude got me to thinking
> bout Pully
> sizes... Since the air is less dense the compressor has to work
> longer to
> create the same amount of air pressure.... and since this really is about
> how many pounds are in the tank over a given amount of run time... Could
> you use a differnt pulley size to come up with a normal run time without
> increasing the designed load on it?
>
> Just an off the wall question....
>
> K
>
>
> ----- Original Message -----
> From: "Kim Knapp" <kimknapp@vail.net>
> To: "Shop" <shop-talk@autox.team.net>
> Sent: Friday, October 12, 2001 11:59 PM
> Subject: OK, here is what my 208v really is:
>
>
> >
> > I didn't think my original question would create so many speculative
> > answers! SO, I decided to trust noone and just measure what is
> coming into
> > one of the panels. There are four BIG wires feeding the panel that I
> > uncovered. One wire is Ground (neutral). The other three are
> each at 120v
> > (almost exactly) from ground. Between any two of these three I
> measure ---
> > you guessed it --- 208v.
> > So, back to my original question which was; what does the group think
> about
> > running a compressor rated for 230 on 208. Unfortunately, Ingersoll-Rand
> > says no. Campbell Hausfield says no. Sears (FWIW) says no. Someone
> suggested
> > looking at the motor plates. Last time I was at Loews I looked at the
> motor
> > plates on the compressor they were selling (don't remember brand) and it
> > said 230, not 208-230.
> > So, I am now down to American IMC(Bel Aire) and Northstar
> (Northern Tool's
> > brand?), which are specifically rated at 208 to 230. Anyone have
> experience
> > with either of these? Efficiency is very important, since up
> here at 9000'
> > we are already down by over 25%. I currently have an Emglo
> rated at about
> > 13cfm delivered at 90psi and when run an 8 or 9 cfm tool the compressor
> runs
> > continuously and pressure still drops!
> >
> > Kim
> >
> ///
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