Three-Phase Transformer Tutorial

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

  1. Skinny141

    Skinny141 Thread Starter New Member

    Joined:
    Dec 3, 2003
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    1
    I'm working my way through the allaboutcircuits.com 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,
    Jeff
  2. t_n_k

    t_n_k AAC Fanatic!

    Joined:
    Mar 6, 2009
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    5,193
    I can't see the connection issue for Y-Y you refer to in the link you provided.....
  3. Lundwall_Paul

    Lundwall_Paul Member

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