3-phase transformer

Discussion in 'Homework Help' started by dan_man555, Oct 16, 2010.

  1. dan_man555

    Thread Starter New Member

    Sep 1, 2010
    18
    0
    What are the available line currents on the primary (HV) and secondary (LV) sides of a 2,000kVA, 3 phase 11,000V/400V transformer?

    I think i got this one, but just want to be sure



    a=v1/v2

    a = 11000/400
    =27.5


    S1= √3 V1 I1


    2,000,000VA= √3 ×11000 × I1


    Iprimary= 104.97A
    a=I2/I1


    27.5=I2/104.97


    Isecondary=2886.75A
     
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    Your answers look fine.
     
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