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From: davidc@vlsisj.VLSI.COM (David Chapman)
Newsgroups: comp.periphs,misc.wanted,sci.electronics
Subject: Re: UPS Information Needed
Summary: look for the ones that run off the battery all the time
Message-ID: <15396@vlsisj.VLSI.COM>
Date: 21 Nov 89 03:42:17 GMT
References: <1989Nov17.140437.13421@null.uucp>
Reply-To: davidc@vlsisj.UUCP (David Chapman)
Organization: VLSI Technology Inc., San Jose, CA
Lines: 21

In article <1989Nov17.140437.13421@null.uucp> eric@null.UUCP (Eric J. Johnson) writes:
>  I am looking for a true UPS (zero switchover time) that will provide
>about 10A 115V for 15-30 minutes.  Does anyone have any suggestions?  I
>have tried using a less expensive standby power system (2-4 millisecond
>switchover) but that seems too long a delay (or too low a voltage) for
>my equipment.  Thanks.

The best way to get zero switchover time is to buy a UPS that supplies power
from a DC-AC inverter running off of a battery.  The battery is then charged
by an AC-DC power supply.  This is the way our UPS runs; it has about 10 VAX
minicomputers and 150 workstations hanging off the back.  Of course, it has
a room full of batteries too.  :-)

I don't know any model names, unfortunately, but you should be able to find
out whether a particular model is set up this way.  It's important enough
that it has started to become a sales point.
-- 
		David Chapman

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