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Homework Help: Three phase system

  1. Feb 7, 2010 #1
    1. The problem statement, all variables and given/known data
    consider the balanced three phase star source with RMS phase voltage magnitude of 230V shown in fig5 with an impedance of Zg=5+j5.The per-phase impedance value of a three phase balanced star and delta connected loads are 30+j30.
    a)Determine the line and phase voltages and currents at the star and delta connected loads

    2. Relevant equations

    don't have any,sorry~
    3. The attempt at a solution
    i totally got no idea where to begin with,can someone please guide me??thanks~
  2. jcsd
  3. Feb 7, 2010 #2
    From my standpoint, it looks like you know nothing about three phase power since you've shown no work. It's a little hard to write out a whole chapters worth of theory on three phase power to prepare you for this problem.

    To do this problem, I would convert the delta load to a Y load, and use a per phase analysis.
    http://img697.imageshack.us/img697/4961/42710974.jpg [Broken]
    Last edited by a moderator: May 4, 2017
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