[4155] in North American Network Operators' Group
Inverters
daemon@ATHENA.MIT.EDU (Mike O'Dell)
Sun Sep 8 11:26:26 1996
Date: Sun, 8 Sep 1996 11:25:23 -0400 (EDT)
From: mo@UU.NET (Mike O'Dell)
To: freedman@netaxs.com
Cc: nanog@merit.edu
Gee, you can either do an Alta Vista search, or even ask MFS what they
use to power AC things from CO-DC supplies.
the one that seems most interesting is Exceltech out of Dallas.
they have a modular inverter system which makes its ratings at 100%
duty cycle (ie, all the time). they can rack and stack up to
20KVA per assembly, if my feeble memory serves me right.
last time I looked, MFS used the smaller non-modular Exceltech units
to power AC things they supplied on MAE-EAST (ie, at their end).
Don't succumb to the stupid idea of buying a UPS without batteries
and then connecting to the DC supply. most ups units smaller than
a refrigerator have to be significantly derated to be used in
"pure interver" service. the manufacturers scream when you ask
them about this.
of course, 28.8 modems, 10-base-T hubs, and everything else you
need IS available DC powered. you just have to be diligent. (grin)
but there are times when using an AC thing *is* more expedient.
Just plug the cord into a real inverter running off house DC.
Good luck.
-Mike O'Dell
UUNET Technologies
