On Wed, 15 Aug 2007 15:41:07 GMT, Esther & Fester Bestertester
wrote:

Your claim is true, if and only if, you are talking about a double
conversion UPS. The normal line interactive backup UPS (the type
you
were referring to) has no more surge protection in it than one of
those cheap power boards.

Hogwash, of course the UPS I am talking about is part of a power
system.
Hence you are the one who is wrong. Using a power strip alone, will
barely
protect equipment from line surges. Using a UPS will protect from
line
surges as well as more importantly keep your equipment running
during a line
outage. No power strip will provide power during a line outage.

It might just be me, but does it sound like these two are arguing the
same
point...?

FBt


You are missing the point. Dana is saying that a common line
interactice UPS used for mains backup provides superior ability to
clean up incoming mains power better than a regular power anti-surge
board.

I am saying this is totally incorrect. The truth is that a line
interactive UPS (as Dana referred to) has only the barest minimum
anti-surge capability inbuilt at the front end where the mains comes
in (that's why they are so cheap). It is similar to the normal MOV
devices you find in the power boards. When mains supply is present the
only part the UPS plays in cleaning up the supply is via these MOV
devices. There is absolutely nothing else between the mains input plug
and the mains output plug on the UPS since the internal DC - AC
converter is bypassed. ONLY the double conversion UPS has the ability
to clean up the incoming ac since it is "regenerating" the output
voltage and frequency using its sinewave DC- AC converter 100% of the
time mains is present.