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Archiver > TMG > 2003-06 > 1054897519


From: "Darrell A. Martin" <>
Subject: RE: [TMG] Comment on UPS
Date: Fri, 06 Jun 2003 06:07:43 -0500
References: <001201c32b8e$1ac69c40$4001a8c0@RichardA31><5.1.1.6.2.20030605131957.00a82ba0@mail.comcast.net>
In-Reply-To: <5.1.1.6.2.20030605145036.00a74568@mail.comcast.net>


At 02:51 PM 6/5/03 -0400, Mikey wrote:
>Okay thanks. I was afraid that it was one for one!
>
>At 02:12 PM 6/5/2003 -0400, you wrote:
>>Its best to have each on its own. UPS's are rated in how much power they
>>can deliver, and a UPS to power two computers will often cost more than
>>the price of two separate units. Also, you want the UPS to signal the
>>computer to shutdown when the battery gets low and this is much harder
>>if multiple computers are on one UPS. As for home use, most UPS should
>>be acceptable. If you leave the computer on unattended just make sure
>>the UPS can send a shut down signal to the computer.
>>
>>Richard Damon

Hi:

Based on how much money one is willing and able to spend, the options are
nearly endless. For example, UPS units at the high end are rated in kVA. A
typical PC UPS is going to be 500 VA, or at least in that order of
magnitude. That translates to 0.5 kVA, and you can string 10 kVA UPS units
together if you want. Some emergency communications centers' power backup
systems use as much electricity just keeping the batteries at full charge
as a "typical TMG user" would need to run the PC itself....

I know of installations where *many* devices are running off one huge
battery-based UPS. The automated shutdown procedure signals, not a
computer, but a diesel generator. The generator, in turn, has an automated
trigger to shut everything down when its fuel is exhausted. That would
usually mean that no humans have returned to the site since the
blizzard/hurricane/war started days ago. TMG would long before have become
a secondary consideration for most of us.

For more information on this kind of thing, take a look at:

http://www.apc.com/sizing/selectors.cfm

Disclaimer: I am officially listed by APC as an "ambassador", meaning that
I'm on a list of people who could become a dealer for them. I have not done
that, nor have I ever profited from the sale of a UPS. My recommendation is
that you buy from a local retail store that you have dealt with in the
past, or from an online retailer that you trust. APC is *one* excellent
choice, in my opinion, and is widely available at such places [grin].

Darrell


Darrell Allen MARTIN
a native Vermonter currently in exile in Addison, Illinois
www.darrell-martin.net/genealogy/

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