Delta Connected Loads Assistant Please

Discussion in 'Homework Help' started by ElecNerd, Jan 2, 2011.

  1. ElecNerd

    Thread Starter New Member

    Jan 2, 2011
    In the process of completing some revision questions. Could someone advise me on how I would calculate the current in the red line and the total reactive power dissipated for a DELTA connected load comprised of an impedence of 10 <40° with a line voltage of 650V.

    Whilst I understand a majority of the theory behind the DELTA connections I am getting confused with how to calculate these questions? Do I need a phasor diagram to work this out?

    I am not after just the answers by any means - I am looking for guidance to be able to ultimately completely these myself however due to lack of guidance from the tutor a lot of the formulas are having to be researched myself...

    Thanks again for all your help!
  2. edgetrigger


    Dec 19, 2010
    for delta as explained to you in your other threads phase voltage and line voltage are same.

    So VL = 650 = Vp

    Vp = 650<0, that voltage has to be taken as 650 angle 0 degree

    I = V/Z

    Ip = 650<0/10<40
    = 65<-40

    IL = √3 65<-40 in polar form.