On Fri, Jan 1, 2016, at 04:44 PM, Bertho Stultiens wrote: > On 01/01/2016 07:25 PM, Kirk Wallace wrote: > >> Machine wiring is different in that you can have scenarios where > >> references are moved, especially in a 2-phase system where you are not > >> using the neutral, which is the scenario we have here. > > My understanding is, and I could be wrong, that "two-phase" in reference > > to modern mains circuits does not exist. Circuits with two hot legs, L1 > > and L2, are single phase and referenced to each other. Two phase used to > > be two legs that were 90 degrees apart, but is long gone. > > That was (almost) my faulty thought too at first, but it turns out that > the 2-phase system referred to comes from a single transformer with two > secondary windings. This gives you two 120V lines wrt. neutral (L1 and > L2) which are 180 degrees shifted. Therefore, the difference between L1 > and L2 is 240V. This is ENTIRELY a function of where you are and what language you speak. (English and American are not the same language :-)
In the USA, Kirk is 100% correct. Two phase means 90 degree phase shift, and is pretty much non-existent. 120V-0V-120V with 240V from end to end is "single phase". Call it two-phase and people in the States will look at you funny. John Kasunich ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
