Sorin Srbu wrote: > > The voltage has been fairly constant here over the years since I started using > UPS and logging the voltage and stuff, 238V more or less constantly. It rarely > drops below 236V or over 240V. We mainly use the UPS:es to have controlled > shutdowns should the power fail entirely - We had some issues a few years back > while they built a new school the other side of the road when the power went > up and down for a uyear or so, and the diesel-generators didn't start up as > expected. This whole building where I work is supposed to be a wartime > hospital with power-backups up to yinyang. But it failed when we needed > them... #=;-( It's a tough thing to get right. I've been involved with several systems and they all failed a time or two in initial testing even after everyone thought they should work. And then things break after that... > > It might be that the power is too high, although the standard is 240V in > Europe AFAIK. Or the UPS-units *may* have been rated for the previous lower > voltage-level at 220V, but that sounds a bit farfetched IMO. Unless the units > were a (very much) older batch that APC dumped on us... Another issue can be that you aren't backing up the air conditioner power, so when the grid goes down your still-running equipment overheats, damaging the electronics. This is particularly likely if your servers are racked densely in a small space. -- Les Mikesell lesmikesell at gmail.com