[time-nuts] The home time-lab
csteinmetz at yandex.com
Mon Jul 25 08:39:19 EDT 2016
> I've never thought UPS were a good idea for anything but a computer
> that needs to shut down gracefully. For your use you need something
> that cleans up the AC mains power.
A proper "online" (or "double conversion") UPS does just that. It
always provides cleanly-generated sine-wave power from a DC-AC
converter. Most will even deliver crystal-controlled power (i.e.,
non-synchronous with the AC line) in several frequency increments, if
you desire, as well as a choice of regulated output voltages. (For
obvious reasons, they are usually operated synchronously.)
They are *much* more effective than ferroresonant supplies at removing
glitches from the mains supply.
You must be referring to "offline" backup supplies.
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