[Cialug] Slightly OT, .. UPSs

[L. V. Lammert]

On Mon, 24 Feb 2014, David Champion wrote:

> 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.
>
We do that, .. battery voltage shows OK.

> 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.
>
Yep! That's why I am trying to solve the core problem - what sort of UPS
will fail UP (i.e. just pass through line power upon failure).

	Lee