DeltaWye

I’d never run an Eaton PowerWare UPS in “economy” mode where it bypasses the double-conversion stage unless it detects an outage or sustained bad power quality.

The whole idea of a double-conversion UPS is isolation from shit on the grid that’s only suprassed by something like a motor-generator/flywheel system.

Feb 24 at 9:57pmWeb
Show threadMazzyFeb 24
@DeltaWye what percentage does that even save you anyway
Show threadDeltaWyeFeb 25
@jazzoomazzoo Not enough to warrant exposing really critical and sensitive equipment to transients.
Show threadMazzyFeb 26
@DeltaWye oh 100% I'm just curious what the proposed benefit is. Last I recall most UPSs have a max overhead of like 3%
Show threadDeltaWyeFeb 26
@jazzoomazzoo Bean-counter stuff really - or if you have equipment that doesn’t mind short power quality problems
Show threadMazzyMar 2
@DeltaWye what's wild to me is (in my job anyway) there's such a greater potential for getting cost savings for electricity by just like, adding running capacitors to loads or substation level capacitor banks. If you are able to build it internally, turns out the cost for power factor correction capacitors and contactors both from Weg are cheap as hell
Show threadAMSFeb 25
@DeltaWye A few percent losses plus a few dozen watts IIRC. I can't wait for the SiC SSCB-based UPSs to come out. "Economy mode" with μs response time to transient excursions.