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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