[aprssig] 8 hour Backup Power Rule

[John Galvin]

KB0THN's comment is also true for your land line CO's, but in reverse. They 
run with a battery (wet) bank connected directly to the equipment. The 
batteries in turn are charged from the power mains with inverters. These 
battery banks usually float at ~52vDC. Since the Chicago CO fire of some time 
ago, COs are/have been converted to dual battery systems (A & B) located in 
different parts of the CO. Equipment since that time has/had to be designed to 
accept the A and B DC power inputs. This arrangement could last for more than 
8 hours.

Regards, John - N5TIM
ex - Collins, Rockewell, Alcatel
-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
John Galvin - N5TIM
http://www.qsl.net/n5tim for Public Service Info
http://www.garlandraces.net/

JUNK - Stuff we throw away ... STUFF - Junk we keep!