How do you do....it? Thread, UPS's and Power Distribuition in Technical; Powering aircon from UPS? 20kva for 3k? Im interested!
Ps it was a hard sell to the Bursar ...
18th February 2012, 06:16 PM #16
Powering aircon from UPS? 20kva for 3k? Im interested!
Ps it was a hard sell to the Bursar to buy a jenny, could not argue against well the PCs in classrooms will be off anyway,so whats the point...
So I just have to make do with APC network shutdown software for now... :-(
Last edited by MrWu; 18th February 2012 at 06:21 PM.
18th February 2012, 06:21 PM #17
I think the key thing is do you need your UPS to allow a graceful shutdown of your systems or to keep them running for hours? Remember that I bet in 98% of schools they don't have the desktop PCs, edge switches etc on UPS's as well thus what is the point of your server room running on UPS for 6hrs you might as well reduce the £ of the UPS and have it run for 1hr to allow a graceful shutdown.
We designed ours, with Borri, to run for 45 minutes at 75% load, we worked out that should give us enough time to get everything shut down in the rack safely, as well as allowing them to run for 5-10 minutes before having to start that process to mean that small power spikes, quick turning offs that are needed etc don't create too many problems.
Thanks to john from:
MrWu (18th February 2012)
18th February 2012, 06:23 PM #18
That was my friends second hand Gen Set. I'm speccing the same as @john with regards to the shutdown period We tend to get many powercuts here but none tend to last more then 20 mins. So I've specced my UPS to run for 20mins before needing to shut things down - overall about 50 mins should do the trick for us.
Originally Posted by MrWu
18th February 2012, 07:03 PM #19
It got switched out due to cost saving! Unfortunately I wasn't involved in the original building design. Still the UPS is in a IP65 rated case because of the sprinkler system (and they have now installed metal shields over the top of them!). Not that it'll do any of the other equipment any good...
Originally Posted by glennda
19th February 2012, 03:49 PM #20
Just think of the insurance claim for all that damaged kit as it will = an entire new school, I'd still be trying to get it ripped out as I bet your insurance company won't be enjoying it
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