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Old November 23rd 05, 06:33 PM posted to rec.radio.amateur.homebrew
UPS DUDE
 
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Default Uses for Old UPSes

Yes, very possible !
Exide models as well at the other big boys Liebert etc.
use this configuration.

They use torrid transformers, very compact,
the entire assy about the size of a loaf of white bread !

The ups w batteries about 36" cubed. 12 KVA 3 phased.

dude



216 volt battery pack??? I don't think so.


No, quite possible and makes some design sense - they would not need
a heavy output transformer in the unit boosting the voltage of a 36V
or 48V battery string after converting it to a sine wave AC, as 216V
would be right around the sine wave peak voltage of 120VAC. Just run
the battery DC through two sets of power transistors to let through a
reconstituted sine wave - one for the positive half of the output
waveform, the other negative.

And it cuts the current the transistors have to pass.

-- Bruce --

--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
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