np.:

"The lower cost off-line (sometimes called standby) UPSs are fine for most applications. However they are not available for much over 1000VA (equivalent to about 700 watts) of power. Also they do not usually allow extra batteries to be attached to increase the support time.

One trick is to use a bigger UPS than you need to get more support time. For example a 1000VA at full load might have a support time of 10 minutes, but at half load (500VA) you would get not double the time but nearly three times."

http://www.garfnet.org.uk/new_millenium/john.htm



--------------------------------------------------
Note added at 2002-10-08 08:07:32 (GMT)
--------------------------------------------------

lub tutaj:

\"If a power failure occurs, employees using the computer should adjust their work activities according to the design of the UPS system. If the system was designed for a smooth and orderly shutdown, then the staff should immediately begin shutdown procedures. If the system was designed to support critical operations, then work should be carefully prioritized. In this case, you should establish rules for shutting down the system as the end of the UPS support time approaches\"

http://www.nysscpa.org/cpajournal/old/10691673.htm