North American Network Operators Group|
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
Re: UPS and generator interaction?
- From: Daniel Senie
- Date: Mon Mar 29 14:15:45 2004
At 01:53 PM 3/29/2004, Mike Lewinski wrote:
An additional note: some of the small to mid-sized propane/natural gas
units come as packaged systems with a generator and transfer switch. These
can be a good value and work well too. Do some shopping.
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.
The Winco 8KW unit I use to protect my home is designed to output 62.5Hz
when unloaded, so that motor starts (well, furnace) don't pull it below
60Hz. Devices all seem quite happy with this setup. We use a bunch of APC
SmartUPS units because these have sensitivity adjustments. We need to knock
them back to the medium sensitivity or they freak out with the 62Hz, and
keep switching on and off battery. We find the lower-end units (BackUps)
won't work at all, since they just freak.