On May 24, 2017 1:08:09 PM GMT+02:00, Charles Lepple <clep...@gmail.com> wrote: >On May 24, 2017, at 5:11 AM, Arnaud Quette <arnaud.que...@gmail.com> >wrote: >> >> Hi all, >> >> here is another one, related to ATS (automatic transfer switch) this >time. >> >> in order to track "dephasing" between input sources (1 and 2), I'd >like to add a new variable: "input.phase.shift" >> >> >> Details and implementation can be found on: >> https://github.com/networkupstools/nut/pull/433 >> >> Comments and feedback warmly welcome. > >I don't think "dephasing" is common usage, but "phase shift" should >suffice. > >Also, how does this apply to 3-phase systems? Is it nominally 120 >degrees? > >Strange that this has not come up before. >_______________________________________________ >Nut-upsdev mailing list >Nut-upsdev@lists.alioth.debian.org >http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsdev
It was my impression too. However it seems the 'phase shift' usually refers to lag between Amperage and Voltage waves, while this issue is (if I get it correctly) about two separate ATS inputs fluctuating on their own different clock-offsets. Should be same freq (50 or 60) though, or likely assumed so - which might not be guaranteed in real life either ;) On the other hand, if the freqs differ, this reported skew degree will vary over time (if detected and reported honestly)... Jim -- Typos courtesy of K-9 Mail on my Redmi Android _______________________________________________ Nut-upsdev mailing list Nut-upsdev@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsdev
