On 4 January 2017 at 09:34, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote:
> -------- > > >Do you have a reference to this +6%? I've heard from various sources that > >the UK is 230 -6%/+10%. If the EU dictates otherwise, then I'm certainly > >over the 6% limit. I may or may not be over the 10% limit. > > There was a transitional range, but I belive it has expired. > > In 240V countries it was -6%/+10%. > > In 220V countries it was -10%/+6% > > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > I measured my voltage overnight in a peak hold at 255.10 V RMS as close to the meter as I could. One of the phases goes via a 100 A switch to the garage. I measured on the input of that switch. At 230+10% the maximum permissible is 253 V, but mine went to 255.10 V. That was measured on a Tektronix DMM916 (40,000 counter) meter, which has not been calibrated since I bought it new about 20 years ago. I spoke to a friend of mine who worked at the CEGB. He thought I might have a tough time getting the electricity company to do anything about 2.1 V if it was expensive for them to do. I was going to report my findings today at http://www.ukpowernetworks.co.uk/internet/en/power-cuts/report-it/report-general-issue-form/ but having spoken to him, I think I'll monitor for a few more nights and see if the problem gets worst than 2.1 V outside the specification. The specification of the meter is +/- 0.7% + 4 counts, so measuring at 253 V (maximum permissible mains voltage), the meter specification is +/- 1.81 V, so there's no doubt that a measurement of 2.10 V above the maximum with a meter that's not recently been calibrated, is a bit on the dubious side. Perhaps I need something a bit more convincing before reporting this. I was thinking of buying a Keysight handheld, but whilst some are cheap, anything with a reasonable amount of functionality is quite expensive. Dave _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.