[Rosie] The phenomenon is referred to as a 'brown out' - at least here it is. The description is obvious when you think about the affect on your light globes. In the last house I owned I had two phases connected and, on a number of occasions, could have full voltage and current available on some internal circuits and not on others. This of course also applied to total power cuts where only one phase was down. The reason for the variation in equipment functions is simply that some items will run on a range of, say, 180 volts to 260 volts while others need the full pressure (usually 230V +).
(flerdle) It's the first time I've ever seen it, and there were power cuts galore when I was a small child (say late 40's). The voltage here is allowed by statute to vary 10% (up 4 and down 6) but this was down 50%, at a guess. (Dujon) Can't be that, because everyone here is on single phase except industrial premises which have all 3. There were 2 more cuts early this evening. When the first (over an hour) ended it came back on (full voltage) for less than a minute, just enough time to put the candles out before going off again for another 40 minutes or so. Loud, pointed and profane were my exclamations to no-one in particular.
[rab] That's right, I'd forgotten that I changed from kt to Kathryn. That's how long ago it was. Hi, flerdle! Sorry I dropped out of contact for a while there. Are you still in the middle east? Edinburgh's rather nice, actually, with more sun than I had imagined. And hello Simons Mith also. It's amazing how stable the MC community is...