Many UPS units are also default configured in so called bypass mode. To save energy and battery life.
How to explain that with my English ? ok what you want an UPS to do in many cases is to run the incoming AC to the rectifier trough the battery stack and then make new AC with output inverter all the time, even when there is AC at normal levels present at the input. To ease the life of the batteries and inverter many UPS bypass input to output and keep the output inverter idling, and then in case of power loss switch over to to output inverter really fast usually with static switches this works realy good in modern UPS but the obvious drawback is no surgeprotection. A word about MOV based surge arrestors (the most common kind) my experience is that you can easily see when they worked :-) they usually exploded, if the surge is big enough, I have changed a lot protective circuits in the products I work with, after lightning storms. -- Mnyb ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=51509 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
