Three-Phase Transformer Tutorial

Discussion in 'General Electronics Chat' started by Skinny141, Dec 3, 2003.

  1. Skinny141

    Thread Starter New Member

    Dec 3, 2003
    I'm working my way through the tutorial (nice job, by the way), and I've come across a little snag. In the 3-phase transformer section:
    Three-phase transformer circuits
    for the Y-Y configuration, why is A connected to C and vice versa while B is connected to B? Wouldn't this wiring configuration reverse the phase rotation of the secondary circuit? Shouldn't A be connected to A and C be connected to C or at least keep the cross connections in the same order to keep the same phase rotation? Perhaps I have a basic misunderstanding of the underlying concepts. All I know about electrical circuits comes from this tutorial and one college circuits class (15+ years ago).

    Thanks in advance,
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    I can't see the connection issue for Y-Y you refer to in the link you provided.....
  3. Lundwall_Paul


    Oct 18, 2011
    Swap any two phases on a Y circuit will change motor rotation. Same thing for Delta.