Inductive/Capacitive Load

Discussion in 'Homework Help' started by bdl0614, Jul 17, 2010.

  1. bdl0614

    Thread Starter New Member

    Jul 16, 2010
    3
    0
    A distribution bus has the following loads attached. What is the total MW load and is it inductive or capacitive?

    5 MW and 1 Mvar
    3 MW and 1 Mvar
    2 MW and -2 Mvar
    10 MW and 3 Mvar

    Choices:
    a. 3 Mvar / Inductive
    b. 20 MW / Inductive
    c. 3 Mvar / Capacitive
    d. 20 MW / Capacitive

    Thanks for your help!
     
  2. timrobbins

    Active Member

    Aug 29, 2009
    318
    16
    bdl, how would you go about answering this? Most people don't mind helping those who at least put some effort in first.

    Ciao, Tim
     
  3. bdl0614

    Thread Starter New Member

    Jul 16, 2010
    3
    0
    Well. The question asks for the total MW load, therefore the two options in Mvar don't make much sense. That leaves me with 20 MW for the total that does add up. As far as the Inductive or Capacitive part, the total Mvar would be positive which would lead me to believe it is a capacitive load?
     
  4. timrobbins

    Active Member

    Aug 29, 2009
    318
    16
    Isn't that strange - you've answered the question yourself - well done!
     
  5. Ghar

    Active Member

    Mar 8, 2010
    655
    72
    Wait, don't capacitors provide reactive power?
    So if the load is positive vars that means the load is absorbing vars, meaning it's inductive?
     
  6. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    Ghar is right. When we refer to the load, we mean that the values given are consumed. So if the load consumes 3MVars of power, then it is an inductive one.
     
  7. bdl0614

    Thread Starter New Member

    Jul 16, 2010
    3
    0
    That does make sense. I was not looking at it from the load side. Mvars are being consumed by the load, which would then make it an inductive load.
     
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