[CentOS] wich apc ups?
Stephen Harris
lists at spuddy.org
Tue May 29 19:02:33 UTC 2007
On Tue, May 29, 2007 at 02:55:02PM -0400, Jim Perrin wrote:
> On 5/29/07, Mark Hull-Richter <mhullrich at gmail.com> wrote:
>
> >Getting a little OT here, but how does one match up the VA ratings of
> >the UPSs (and battery backups) with the power supply wattage ratings?
>
> Watts = Volts x Amps. I usually use a sliding scale based on # of machines.
Which is correct for DC circuits, but not for AC. A 1500VA UPS does not
provide 1500Watts of power. And given the output of UPS's aren't necessarily
perfect sine waves, it gets more complicated.
A typical APC 1500VA UPS has around 860->900Watts of power.
The answer to Mark's question is "check the manufacturers web site" :-)
--
rgds
Stephen
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