I think pfarrels and pski's reasing is sound . The UPS should not run i "bypass mode" and then switch to battery .
The device protected should run of the generated AC after the DC stage . Even if modern UPS should be using static switches (not relays or contactors) and thus be able to switch within milliseconds . I think this is getting you better "spike" protection . But i would also use an overvoltage fillter/protection of some kind if lived in a rural area with lots of these events, there are (at least in the 220v world) avaible for plug in to the wall outlet. But I may be spoiled with what we use at my work, we do not power only computers, but plc's controll systems cpu boards of vsd drives and safety systems and emergency stop relays and other industrial equipment at the same time . Btw whatever UPS you get don't forget to change the battery after a couple of years, follow the advice from the battery manufacturer , life expectancy may vary. There are many "UPS" out there that are not UPS due to broken batteries . Maybe never UPS will have some kind of battery monitoring but if such alarms occur your very late . -- Mnyb -------------------------------------------------------------------- Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 and assorted amps SiriuS, Classe' Primare and Dynadio speakers, Contour 4 Contour Center, and Contour 1.3SE for the rear ch. Rel Stadium 3 sub. Bedroom/Office: Boom Kitchen: SB3 + powered Fostex PM0.4 Miscellaneous use: Radio (with battery) I use a Controller various ir-remotes and a Eee-PC with squeezeplay to control this ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=80889 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
