[11737] in North American Network Operators' Group
Re: Backup Power Schemes
daemon@ATHENA.MIT.EDU (wb8foz)
Sat Aug 9 22:12:26 1997
From: wb8foz <wb8foz@nrk.com>
To: ftang@iconn.net (Felix Tang)
Date: Sat, 9 Aug 1997 18:04:24 -0400 (EDT)
Cc: nanog@merit.edu
In-Reply-To: <3.0.3.32.19970809215351.00c9d520@mailhost.iconn.net> from "Felix Tang" at Aug 9, 97 09:53:51 pm
Reply-To: wb8foz@nrk.com
Felix Tang sez:
>
> Anyone have experiences with vented vs. non-vented cells when building out
> your DC plant?
Unless I misunderstand your meaning, I gather you mean
cells that vent to the room air vice out a vent pipe?
A battery room damn well have 100% separate ventilation;
you don't want either the hydrogen fumes or acid near your
expen$ive cisco's and TNT's...
Also, such a room should have draconian restricted access rules.
Besides the obvious acid-in-eyes issues; drop a screwdriver or
wrench across a 2v 500Ah cell and it will turn bright orange
really fast and thne start throwing molten metal. Now think
about a watch band doing that......
As I said, the costs of a real 48v DC plant add up fast.
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