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A question about a three-phase circuit

  1. Apr 23, 2012 #1
    Attached.
    I'll be happy for some help here.
    Thanks. :redface:
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Apr 24, 2012 #2

    NascentOxygen

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    Staff: Mentor

    So am I. :smile: You have added I₁ + I₂ without regard for their different angles.
     
  4. Apr 24, 2012 #3
    oops.. :) but still, S1 and V1 are similar in phase, aren't they? And since that's the case, S/V yields magnitude only (on the real axis). Same for both loads. And since the phase becomes 0 for both I1 and I2 (which is wrong obviously, but I cannot figure out where exactly I miss a thing here) so I can add I2 to I1.
    That's probably my problem here. Any idea?
     
  5. Apr 24, 2012 #4

    NascentOxygen

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    Staff: Mentor

    What does "similar in phase" mean exactly http://img820.imageshack.us/img820/9631/icon5j.gif [Broken]

    The details are that one load has a leading pf and the other a lagging pf.
     
    Last edited by a moderator: May 5, 2017
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