I would like to learn more about large-scale UPS systems, particularly the battery strings used in traditional RBOC/Telco applications. These are the sort of beasts that use huge strings of 6V 220aH deep cycle batteries, or even large numbers of 2V 400aH batteries on very strong earthquake-resistant shelving wired up to create a 48V mega-battery. Can anyone point me to the most definitive reference materials on the subject?
posted by thewalrus on Dec 17, 2009 - 4 answers

I have a 850va 425w UPS battery backup with only 2 outlets. There is a small server, speakers, home theater projecter, lcd monitor, and router connected to a power strip. The power strip and a desktop plug into the UPS. Is this setup safe? I am concerned about short 1-second interruptions caused by bad electrical connections rather than power outages.
posted by lpctstr; on Apr 25, 2009 - 8 answers

OS X and a APC UPS - clever solutions? [more inside]
posted by xmutex on Sep 26, 2008 - 6 answers

Diesel generator question: What is the typical fuel consumption rate of a 5kW, 10kW or 20kW unit at various load factors? How much does this vary (in litres per hour, or per day) between the same sizes of unit from different manufacturers? [more inside]
posted by thewalrus on Apr 28, 2008 - 2 answers

What is wrong with my surge protector??!! [more inside]
posted by Hargrimm on Nov 28, 2007 - 13 answers

Looking for Power Consultants for Data Centers that service the NY-Metro Area. Can anyone make any recommendations on 15-25 kva UPS systems and engineering firms/contractors who can help implement this from end-to-end ? Or even point me into the right direction so i can code call myself. [more inside]
posted by hboogz on Oct 2, 2007 - 1 answer

Which UPS units to buy? I want one on which the power failure audible warning can be turned off permanently. [more inside]
posted by reddot on Feb 14, 2007 - 13 answers

Is the noise of my uninterruptable power supply (APC BE650R) normal? [more inside]
posted by Yogurt on Nov 15, 2006 - 14 answers

I got into a debate the other day with my boss, who is absolutely anal-retentive about everything power related (to the point where he scolds me for leaving fluorescent lights turned on if I'm not using the room). [more inside]
posted by melorama on Nov 11, 2006 - 17 answers

I have two UPS boxes (APC CS 500 and APC ES 500). Both have this issue: I have two machines plugged into it. I shut the power off. What's supposed to happen is that the UPS is supposed to power the boxes for X number of minutes on its battery, but what actually happens is both machines shut right down in that second when the thing(s) go(es) to battery. Any ideas why? Isn't that... wrong?
posted by xmutex on Dec 5, 2005 - 24 answers