On Thursday 01 August 2019 13:06:41 rhkra...@gmail.com wrote: > On Thursday, August 01, 2019 09:41:45 AM David Wright wrote: > > Like a real locomotive, genuine '2-phase' electrical power has one > > phase leading the other by 90°, and motors powered by it will be > > self-starting. (Steam locomotives have double-acting pistons, so > > they can choose the direction of rotation.) > > Have you ever encountered genuiine 2 phase electrical power? (Or any > multiphase power other than 3 phase?) (Just curious -- I could not > instantly think of an example.)
I think it has fallen out of use, the last I saw a 2 phase motor was in a garage my in-law uncle built when he got back from WWII and REA came down the road, running a cutoff wheel that was probably older than the uncle. REA was back the next year, stringing the 3rd wire for 3 phase on that mainline. So those poles still stand, carrying the neutral on th tops of the poles and 2 14.4 kv lines on one side of the crossbar, and a third one on the other end of the crossbar. And I've noticed the wires are rotated about 2x a mile. Load balancing perhaps, so when they hang another can, the mechanical hookup is the same but its on a different phase from the neighbor half a mile down the road. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>
