[Nut-upsuser] [Eaton 5S 1500] overvoltage shut down?

Spike spike at drba.org
Fri Apr 7 17:59:09 UTC 2017

and I should have probably mentioned... right after the event I unplugged
the UPS's main and it went on battery, showing it had 11 mins worth of
power left which is exactly what I'd expect on that load with full
batteries. So the UPS "works" as expected, but then unplugging the cable
would test a power dip, not a power spike, which si what I believe
happened. thanks again,


On Fri, Apr 7, 2017 at 10:56 AM Spike <spike at drba.org> wrote:

> Dear all,
> maybe not strictly a NUT question but I can't imagine a better place to
> ask, hope that's ok.
> last night we had what looked like a power spike and 3 machines plugged
> into 2 Eaton UPS went down instantly. I heard the click the UPS makes when
> it shuts the load on the ports and then shuts itself down (ie same thing if
> I simulate with upsmon -fsd). The machines instantly came back, there was
> no actual downtime, and the machine next to them which is not on the UPS
> never went down.
> This to me suggests some kind of overvoltage protection or something where
> the UPS decided to shut down the load, but I'm quite puzzled by it as I'd
> expect the UPS to actually shield the machines from it and certainly not
> turn something off brutally like that..
> has anybody seen stuff like that before? is this a faulty UPS? both units
> are new and from two different suppliers so I'm more leaning toward
> something I don't understand than faulty hw.
> thanks for any input,
> Spike
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