1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Balanced Y-connected 3-phase load

  1. Oct 26, 2016 #1
    1. The problem statement, all variables and given/known data
    A balanced 3 phase supply of VRMS = 6599.1V is applied to a balanced Y-connected 3-phase load consisting of three identical impedances Z = 50<37°. Take the phase-to-neutral voltage Van as the reference. Calculate:

    A)Phase voltages Van, Vbn, Vcn
    B)Phase currents Ian, Ibn, Icn
    C)Total active and reactive power supplied to load

    2. Relevant equations

    3. The attempt at a solution
    6599.1V/sqrt(3) = 3810
    Van = 3810<0
    Vbn = 3810<-120
    Vcn = 3810<-240


    Ian = 3810<0/50<37° = 76.2<-37
    Ibn = 76.2<-157
    Icn = 76.2<-277

    Did I do parts A and B correctly?
  2. jcsd
  3. Oct 26, 2016 #2


    User Avatar
    Homework Helper
    Gold Member

  4. Oct 27, 2016 #3
    For total active power, I got:
    For total reactive power, I got:
    Would you mind double checking?
  5. Oct 27, 2016 #4


    User Avatar
    Homework Helper
    Gold Member

    I am getting values close to yours, just a difference of a few watts.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Balanced connected phase Date
Thermodynamics Power Cycle Energy Balance Jul 29, 2017
Thermodynamics energy balance Jul 26, 2017
Balanced star connected circuit measurements Jan 19, 2013
A balanced wye delta connection Jul 7, 2011