In article ,
Mike 'Flyin'8' wrote:

UPS's don't need time to "Kick In" That is why thet are called
UnInteruptable Power Supplies.

UPS are usually designed to come online within a couple of cycles.

I have never seen a UPS that takes more than a fraction of a cycle to
transition to backup mode. In fact, units which are used in "mission
critical" applications are not the line interactive type as you seem
to be thinking about above, instead are dual online conversion. I
would assume that a UPS used for ILS equipment and radio
communications for ATC would be a mission critical design as opposed
to the less than reliable line interactive design. The dual online
conversion types are actually running off battery and an oscillator
all the time. There is no switching time.

But hey... What do I know...



Mike Alexander
PP-ASEL
Temecula, CA
See my online aerial photo album at
http://flying.4alexanders.com