Original question:
> I am shopping for a UPS for an INOVA 600 that we have on order.
> The APC UPS units that I am familiar with all provide 208 V output,
> meaning that we will probably need a transformer to step the voltage up
> to the 220 V required by the INOVA console. I have noticed that there are
> Liebert UPSs like the GTX6000T-240X that can be configured to have
> 208, 220, 230 or 240 volts. Has anyone had any experience with
> these Liebert UPS models, or any recommendations on accessories and
> configurations?
>
> Also, has anyone had any experience operating an INOVA console on
> 208 V?
Thank-you to everyone who replied to the above question. The general consensus
was that as long as the UPS supplies a good stable 208 V, and no lower, then this is
within the +/- 7% specified by Varian and is O.K. There was one dissenting opinion
that 208 V would cause trouble and might void the warranty. This last opinion
was from a former Varian employee, so it must be taken seriously.
On my question about using the Liebert GTX6000T-240X to boost the
voltage, the one person who tried it had no end of grief, so I don't
think I will go this route. They also had trouble using the 115V output of
this Liebert unit to power the host computer, etc. They suggested getting a
separate 400 VA 115 V UPS (cheap) to power the computer, display, etc.
I think I will get a 208 V UPS well ahead of instrument delivery, and monitor
the output voltage for a while. If it drops at all, or if Varian is unhappy with
the voltage, I will get a simple autotransformer to boost the voltage to 220V.
Our system is coming with a high power solids rack, so I may need a second
UPS for that.
People seem happy with UPS units from Best Power, Powerware, APC and
Liebert. Autotransformers are available from Grainger and McMaster-Carr
or can be purchased from Varian,
Since 208 V (or 240 V ) seems to be the industrial and institutional standard
in North America, it seems strange that Varian doesn't put multi-tap primaries
with voltage selector switches (or jumpers) on their power supplies. Curiously,
they specify 208 V as being O.K. for the high power amplifiers in the
solids rack.
Thanks again!
-Kirk
Kirk Marat, Ph. D., NMR Facility Manager
Dept. of Chemistry
University of Manitoba
Winnipeg, MB, R3T 2N2, CANADA
ph. (204) 474-6259 FAX: (204) 474-7608
kirk_marat_at_umanitoba.ca
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Received on Mon Oct 28 2002 - 14:20:28 MST