[Cialug] Slightly OT, .. UPSs

[David Champion]

You should run apcupsd or a similar program against it, it will give you
battery health stats. If you have a UPS with SLA's that are more than 5
years old, they're most likely dead.

Most UPS's only have a simple relay that switches between mains power and
battery backup. if the battery is dead, any power flicker may cause it to
shut off. I've seen cases where a computer plugged into a failing UPS will
shut off when the lights flicker, but one next to it plugged directly into
mains power stays up.

-dc


On Mon, Feb 24, 2014 at 11:24 AM, L. V. Lammert <lvl at omnitec.net> wrote:

> Had a problem this AM that I'm not sure how to solve. We have a Tripplite
> 3K UPS at a site, and it just SHUT ITSELF OFF for the third time in the
> past calendar year. The issue could be related to the external battery
> pack (getting old), so I disconnected them.
>
> Question - has anyone seen a UPS that will FAIL LIVE (i.e. if the UPS
> chokes, it reverts to line power instead of just dying)? Close as I can
> some on a search is the SU5000RT4U, but I'm not sure even that would solve
> the problem as it is an online UPS (i.e. power output is always from the
> UPS for conditioning).
>
>         Thanks!
>
>         Lee
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