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From: rbc@cbnewsh.ATT.COM (robert.connaghan)
Newsgroups: comp.periphs,sci.electronics
Subject: Re: UPS Information Needed
Message-ID: <5990@cbnewsh.ATT.COM>
Date: 21 Nov 89 18:01:18 GMT
References: <1989Nov17.140437.13421@null.uucp>
Reply-To: rbc@cbnewsh.ATT.COM (robert.connaghan,ho,)
Distribution: usa
Organization: AT&T Bell Laboratories
Lines: 23

AT&T makes a series of UPS's with zero crossover time.
They come in 1, 3, 5, and 10 KVA flavors.

Call 1-800-372-2447 for more info.

They filter and regulate the incomming AC to your load, provide
surge protection, and have no minimum load.

The battery backup system runs in parallel to this in stand-by mode
until the AC input is gone or just out of spec (brown-out) and then
the battery provides power to a DC-to-AC converter that is switched
in "transparently to the load" (I'm reading from the brochure).

They can be upgraded with additonal batteries.
1KVA with internal batteries, 10 Min, 60 min with external batteries.
3KVA with internal batteries, 12 Min at full load.


Robert Connaghan
AT&T Bell Labs
Holmdel, NJ
201-949-1048
vax135!rbc