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Homework Help: Power Factor and Single Phase Transformer

  1. Mar 25, 2014 #1
    What is the secondary current in a single-phase distribution transformer that is attached to a 480v line when the transformer is supplying 120v to a 16kW reactive load with a power factor angle of 40°.

    So I have kVA = 16kW/cos 40 = 20.89kVA

    Is = 1000 * 20.89kVA / 120v = 174A.

    I don't know if I did this question correctly. Do you not have to use the 480v for anything?
  2. jcsd
  3. Mar 25, 2014 #2


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    Staff: Mentor

    Hi fatmoe,

    In future please retain and use the Homework Format Template provided when you start a new thread in the Homework Help sections of PF.

    Your calculation looks fine for finding the magnitude of the current in the secondary.
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