mailing list archives
Re: Data Center AC Issues
From: David VanHorn <dvanhorn () cedar net>
Date: Mon, 24 Sep 2001 21:26:16 -0500
At 10:18 PM 9/24/01 -0400, ainman () umich edu wrote:
Can anyone recommend an expert Troubleshooting/Design firm that has
extensive experience with Data Center specifici AC issues?
We have a strange problem (probably with the airflow/vents/arrangements) which
has machines in various locations dying due to heat, when the ambient temp
isn't above 90.
Are you monitoring your line voltage?
I've seen "normal" AC lines, in the US, anywhere from 70-140VAC.
Modern equipment use switcher power supplies, which draw more current as
the voltage goes lower.
Heat in the power supply is a function of current squared.
So, as the line voltage goes lower, the equipment gets hotter.
(paradoxical-seeming, ain't it?)
Dave's Engineering Page: http://www.dvanhorn.org
Got a need to read Bar codes? http://www.barcodechip.com
Bi-directional read of UPC-A, UPC-E, EAN-8, EAN-13, JAN, and Bookland, with
two or five digit supplemental codes, in an 8 pin chip, with NO external parts.
- Data Center AC Issues ainman (Sep 25)
- <Possible follow-ups>
- Re: Data Center AC Issues David VanHorn (Sep 25)