On Wed, 02 Jul 2014, TOM WALKER wrote to BEN RITCHEY:

BR>* An ongoing debate between Ed Vance and All rages on ...

BR> EV> The UPS just clicked and I looked and only the LED that was ON
BR> EV> was the
BR> EV> one for Running Under Battery Power.

BR>Mine doesn't click, it just beeps like mad when I lose power lol

 TW> IF it clicks(operation of a power transfer Relay) is is not a true
 TW> UPS but mearly a Backup Power Source.

i think you have something confused, tom...

  UPS == Uninterruptible Power Supply

a Backup Power Source is something that /comes online/ only when power is
beyond the upper or lower limits set in the device... eg: outtage,
brownout, over-voltage...

a UPS handles all of these but it is online all the time providing
filtering of the line as well as these other services... some UPSes DO have
relays in them for when they switch to their batteries... other UPSes
choose to use solid-state relays for their switching... all of my APC UPSes
have relays and always have had them...

)\/(ark