Re: Backup power supplies

Ed Chabot wrote:
>
> Thanks Barry.  Any recollection of the cost based on your configuration?
>
> Ed Chabot
> The Marlin Firearms Company
> 100 Kenna Drive
> North Haven, CT 06473
> (203)985-3254
>

The Best power UPS is rather sizeable--in fact it's a 15kVA.  But it
can run every piece of hardware in the place for 45 minutes. I think
it was on the order of $22K or something like that.

The generator, on the other hand, was a piece of hardware that's been
in place since the late 50s.  All I did was to make some engineering
changes to the transfer control circuit, had Onan come in and service
the generator so that it worked properly (it was cranking out 37Hz
power--YUK!)

The only trick to this is going to each piece of equipment that you
want to protect and get its VA rating.  The sum of these values will
tell you the size of the UPS you need (at a minimum).  Run-time is a
function of the battery capacity you put on the UPS.  Also, ensure
that you don't put laser printers or photocopiers on your UPS unless
you have it heavily oversized.  The on/off cycle of the fuser will
drive the UPS control circuitry nuts trying to calculate remaining run
time!

I'm sure that you could get some assistance with this whole project
from either Best (who uses local dealers) or Onan (who also uses local
dealers)

Barry