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From: phil@amdcad.UUCP (Phil Ngai)
Newsgroups: net.analog
Subject: abusing a UPS
Message-ID: <1517@amdcad.UUCP>
Date: Tue, 4-Jun-85 21:37:06 EDT
Article-I.D.: amdcad.1517
Posted: Tue Jun  4 21:37:06 1985
Date-Received: Thu, 6-Jun-85 03:20:35 EDT
Organization: AMDCAD, Sunnyvale, CA
Lines: 19

Let me start by saying there are two kinds of "UPS"s:
1)	standby, which isn't a real UPS but detects loss
of power and starts up an inverter
2)	online, which takes AC, turns it into DC, feeds
a battery, and then turns DC back into AC.

Number 2 is more expensive but can give better service. Number 1 is
ok for most applications, although you can see a florescent lamp flicker
during the switchover, it does not go out. All the equipment I have
doesn't notice, anyway.

So the question is, what would you expect to happen if you plug a UPS
into itself? Do UPS designers have special provision for this kind of abuse?
-- 
 People do what management inspects, not what management expects.

 Phil Ngai (408) 749-5720
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