transformer

Discussion in 'Homework Help' started by eng.mustafasalah, Apr 7, 2012.

  1. eng.mustafasalah

    Thread Starter Member

    Nov 10, 2011
    41
    2
    hiiii

    i have some question
    1 - Why should the supply frequency be maintained constant in no-load test of 1-phase transformer

    2 - Why is the P.F of the transformer is small on no-load
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,018
    3,235
    1. The frequency affects the value of the magnetizing current.

    2. The no-load input current of a transformer is largely inductive magnetizing current.
     
  3. eng.mustafasalah

    Thread Starter Member

    Nov 10, 2011
    41
    2
    thank uuuu
     
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