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RE: UPS and generator interaction?
- From: Dave Hilton
- Date: Mon Mar 29 19:16:19 2004
I had trouble like this years ago. Seems that some UPSes only recognize
sine-wave AC power, whereas some UPSes provice something more like
sawtooth or square-wave AC power.
Inserting a Variac (very inefficient) between the generator and the
sensitive UPSes fixed the problem.
Dum Spiro, Spero
From: Mike Lewinski [mailto:email@example.com]
Sent: Monday, March 29, 2004 10:54 AM
To: Brian (nanog-list)
Subject: Re: UPS and generator interaction?
Brian (nanog-list) wrote:
> Does anyone know of a way to get a UPS to trigger a generator to
> start, and 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.