Assignment Problems

Discussion in 'Homework Help' started by kedez, Mar 22, 2013.

  1. kedez

    Thread Starter New Member

    Mar 22, 2013
    1
    0
    Im working on a power distribution network designing assignment.
    im confused and im not sure am i working on the right track

    an apartment block is supplied from 120/208V three phase 4-wire supply

    Apartment units
    82A at 120 V at unity p.f single phase general appliances
    68 A at 208 V with p.f. of 0.85-lag for single phase Heavy appliances

    it is supplied by two phases and a neutral


    we try to determine the current for each unit and each line

    there is my work, kinda messy but i'm not sure
    the current for each line, is Ia suppose to be equal to Ib with different angel or they should be different answer

    and whats the actual angel for 68A
     
  2. WBahn

    Moderator

    Mar 31, 2012
    17,716
    4,788
    It seems you are assuming the general applieance are equally split between the two sides and don't have any power factor associated with them. Why?
     
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