[54410] in North American Network Operators' Group
Re: DC power versus AC power
daemon@ATHENA.MIT.EDU (Stephen Sprunk)
Sun Dec 29 22:24:04 2002
From: "Stephen Sprunk" <ssprunk@cisco.com>
To: "Wayne Bogan" <wbogan@InfoAve.Net>, <nanog@merit.edu>
Date: Sun, 29 Dec 2002 21:16:39 -0600
Errors-To: owner-nanog-outgoing@merit.edu
Thus spake "Wayne Bogan" <wbogan@InfoAve.Net>
>
> For those AC only powered units, you can also purchase an invertor for DC
to
> AC conversion. You would then have the advantages of DC for your AC
> equipment. This does, however, add the potential of another point of
> failure such as fuses or breakers in the invertor.
Well, that's how AC UPS's work -- just beware what percentage of the input
current is lost in the conversion from DC to AC, plus what is lost
converting from AC back to DC inside the equipment. Much simpler to specify
DC equipment to begin with if you really care about availability.
S
