Roland Jollivet wrote: > Not quite. Most UPS's around 2KVA and below are 'off-line', ie straight > feed-through. Far far cheaper to make. You pay through your ears for an > on-line UPS as it requires a full power down and up converter. >
Every UPS has a full power down and up converter. How else would it work? The difference between small and large industrial ones is in their ability to switch from a UPS mode to feed-through without disrupting the power to the load. Electronics takers care of the sync between primary and secondary AC lines. That way you can work on UPS while the load has full power. Repaired few small UPS' myself and managed a large one in a computer center few years ago. Still have to large 100Ah batteries from one time we replaced 36 of them. > Regards > Roland -- Rafael ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
