why are the current UPSs so light?

[Fred Reynolds]

My guess would be that they do not have a transformer in them
any more. 

Of course, it is just a guess...




-----Original Message-----
From: ncsa-discussion-bounces at ncsysadmin.org
[mailto:ncsa-discussion-bounces at ncsysadmin.org]On Behalf Of Joseph Mack
NA3T
Sent: Saturday, February 14, 2004 3:14 PM
To: ncsa-discussion at ncsysadmin.org
Subject: why are the current UPSs so light?


I was looking at an APC 1000 at Staples this morning and was surprised to
find that I can pick it up easily. There can't be much in there. Somthing
that's going to supply 1000 VA, if it has 4 of the regular UPS 12V
batteries in there, each one has to supply 20A which is a lot. Even if
it's supplying 500VA, that's 10A/battery, and those little batteries don't
do real well at 10A.

The APC 700 I have at work I can barely move. I know the old ones have a
lot of iron in them. Are the new ones all switchers with no iron?

It's hard for me to believe that something as light as the one I picked up
this morning can supply this much power.

Anyone know what's going on?

Thanks Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!
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