nanog mailing list archives
RE: UPS and generator interaction?
From: "Dave Hilton" <hilton () entelos com>
Date: Mon, 29 Mar 2004 16:14:08 -0800
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. Dave Hilton SysAdmin Entelos Dum Spiro, Spero -----Original Message----- From: Mike Lewinski [mailto:mike () rockynet com] Sent: Monday, March 29, 2004 10:54 AM To: Brian (nanog-list) Cc: nanog () merit edu 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. Mike
Current thread:
- Re: UPS and generator interaction?, (continued)
- Re: UPS and generator interaction? Laurence F. Sheldon, Jr. (Mar 29)
- Re: UPS and generator interaction? Mike Leber (Mar 29)
- Re: UPS and generator interaction? Laurence F. Sheldon, Jr. (Mar 29)
- Re: UPS and generator interaction? Mike Lewinski (Mar 29)
- Re: UPS and generator interaction? Jay Hennigan (Mar 29)
- Re: UPS and generator interaction? Daniel Senie (Mar 29)
- Re: UPS and generator interaction? Joel Jaeggli (Mar 29)
- Re: UPS and generator interaction? Scott McGrath (Mar 29)
- Re: UPS and generator interaction? David Lesher (Mar 29)
- Re: UPS and generator interaction? Robert Boyle (Mar 29)
- RE: UPS and generator interaction? kwallace (Mar 29)
- RE: UPS and generator interaction? Dave Hilton (Mar 29)
- Re: UPS and generator interaction? David Lesher (Mar 30)
- Re: UPS and generator interaction? Laurence F. Sheldon, Jr. (Mar 30)
- RE: UPS and generator interaction? Eric Germann (Mar 30)
- Re: UPS and generator interaction? Deepak Jain (Mar 30)
- Re: UPS and generator interaction? Chris Adams (Mar 30)
- Re: UPS and generator interaction? Deepak Jain (Mar 30)
- Re: UPS and generator interaction? Jay Hennigan (Mar 30)