General > General Technical Chat
UPS options
PaulAm:
I cut down the sensitivity setting from high to medium and it's now happy with the power, so that was an easy fix. Might have to widen the vultage trip points or drop sensitivity to low if things start getting flaky under a higher load, but that takes care of the immediate problem.
I was considering a 1KW AC->DC->AC sineware converter in front fo the UPS to be used during outages, but that doesn't look necessary now. Might be necessary if things get really flaky under higher loads; we'll see.
thanks for the responses :-+
I do have an 8KW medical online UPS I grabbed at a surplus auction but I didn't want to dedicate it to the server rack, that's way overkill.
james_s:
Conventional generators are notorious for having nasty waveforms. I have a Honda inverter generator that puts out a nice clean sine wave and none of my UPS's have any trouble with that. IMHO the drastic reduction in noise and enormous fuel savings make it an easy choice for me, having had an inverter type I would never go back to one of those 3600 RPM screamers.
At least your UPS has a sensitivity adjustment, that's probably all you can do. The generator produces dirty power and you can't change that, the UPS is just doing what it's meant to do, sensing the dirty power and switching to battery.
PaulAm:
Outage finally ended 3 hours short of 4 days. That was fun.
The default sensitivity setting is somewhat paranoid, but easy enough to change once you know about it. I swapped the UPS back in when I had the generator down for maintenance and everything was fine.
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