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Question with 3 Phase Transformers Wye-Delta problem

  1. Jun 14, 2016 #1
    1. The problem statement, all variables and given/known data
    TkQbYYt.jpg

    2. Relevant equations
    Wye:
    V_Line = sqrt(3) x V_Phase

    Delta:
    V_Line = V_Phase

    3. The attempt at a solution
    RvaqI4h.jpg

    pxneon8.jpg

    My answer doesn't quite match up with the solutions in the book, and was wondering what I went wrong here? Any help is greatly appreciated!
     
  2. jcsd
  3. Jun 15, 2016 #2

    Tom.G

    User Avatar
    Science Advisor

    For part a) I get approx. the book answer if the secondary load is 3 phase 4 wire, same configuration as the primary.
    You might find it more straightforward to work directly with resistances, rather than with current then calculating resistances.

    As the textbooks like to say: "Part b) is left as an exercise for the reader."
     
  4. Jun 15, 2016 #3
    Yes I've solved it, turned out part b's solution of the book is incorrect according to my professor. Thanks!
     
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