Hi Doug:
A battery is never off. The best you can do is disconnect
it from the circuit. Whether or not the battery is disconnected,
if the separator is damaged, the resulting chemical reaction
will heat and produce gas which will cause the battery to swell.
(Some batteries have
I'm not sure what is going on with your UPS units but I think the best
solution to your particular problem would be to insert a switch in series
with the sounder. Then you could leave the unit on without fear of
bothering the people upstairs.
-
Your problem got me curious so I did a little quick research. According
to Schneider Electric Storing a UPS with the battery connected can cause
permanent battery damage within a few days to a week. A UPS should be
stored after complete battery recharging with the battery disconnected.
Which is probably one reason the UPSs are shipped new with the batteries
disconnected.
-Dave
-Original Message-
From: Scott B. Lacey [mailto:sbla...@verizon.net]
Sent: Monday, January 06, 2014 2:42 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] question about overheated/swollen
Doug,
I've experienced this for many years specifically using APC UPSs with 12V 7ah
batteries and I've used lots of different battery brands. Don't have any
experience with non-APC UPSs. Yes, when the batteries start to fail they swell
up and sometimes need to be pried out of the UPS. (I
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