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  1. Emmanuel_L

    Should i use a UPS on my ht system?

    I've looked at 3 of my UPS with a scope (and a differential probe) and the waveform is a pure sine. I have APC SmartUPS 700 (line interactive) APC SmartUPS 1000 (line interactive) Liebert GXT1000 (online) The line interactive on battery mode (or in voltage regulation) have a little...
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