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RE: UPS and generator interaction?
- From: kwallace
- Date: Mon Mar 29 14:12:05 2004
Brian (nanog-list) wrote:
> Does anyone know of a way to get a UPS to trigger a generator to start,
> to switch over to the generator power automatically or does this type of
> thing just not exist?
What Patrick said.
>But, on a minor note that probably won't affect your Symmetra but I'm
>posting in case anyone else here can shed light on.... we had a power
>event this AM. The transfer switch did it's magic and all was good...
>Except for two new APC1400's- they failed once the batteries drained. I
>triple-checked that they were on the right panel, played with
>sensitivity, even tried daisy-chaining one off a good working 2200.
>Nothing I did would convince the two 1400s they had power. Once the
>house power was restored they came back to life and look normal. I later
>learned that two of our colo customers with APC1400s had the same
>problem :( Other models (even a couple non-essential lower-end, dumb APC
>450s and 650s) didn't blink at the generator power.
If you are sure they were on an EP panel, then you may want to verify the
We had an old 120KVA UPS that was VERY sensitive to frequency, and would
stay on battery while the generator was running, even if the frequency was
only off 1/2 cycle.