3-phase problem

Discussion in 'Homework Help' started by dan_man555, Oct 15, 2010.

  1. dan_man555

    Thread Starter New Member

    Sep 1, 2010
    18
    0
    A real short one:

    If a 3 phase load is calculated at 85kW, with a power factor of 0.87, calculate the apparent power (kVA) and the line current per phase (A/ph).

    Help would be much appreciated.
     
  2. dan_man555

    Thread Starter New Member

    Sep 1, 2010
    18
    0
    I was thinking:

    arccos(0.87)=29.54°
    cos(29.54)=85/(apparent power)

    apparent power = 97.7kVA

    Not sure how to get line current per phase
     
    Last edited: Oct 15, 2010
  3. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    Why not then simply write ...

    Apparent Power = (Real Power) / (Power Factor)

    You can't find the line current(s) unless you know the line or phase voltages.
     
    dan_man555 likes this.
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