[RFI] UPS RFI

[bill ny9h]

I hate that back in 81-83 when i was under contract with 
APC  ,,,introducing a 1 piece product line to distributors ( before 
it shipped) .... APC quickly dropped the term SBS for "stand by 
power"  and  adopted the UPS terminology..  which  means 
uninterruptable power supply.  For many years APC never made or sold 
UPS products. Today they own a large chunk  of even that biz.

an sbs switches over in 'less than' 4 ms; not enough time for a 
computer to detect a failure....and as Jim points out , would then 
make more noise than just charging the battery.

the big UPS advantage , aside from never switching over , as they are 
on all the time, avoiding a failure mode, your stuff does not see the 
line surges, as you ARE MAKING YOUR OWN AC,,,, level of cleanliness 
determined by the design....

I started to write a response earlier but as I have not yet put a 
scope on the output of my 2500VA unit,,,a Powerware , about 85lbs,,,
I thought i'd wait ...but I hear no rfi from it ,,,

bill