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

2. ### timrobbins Senior Member

Aug 29, 2009
318
18
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 Senior Member

Aug 29, 2009
318
18
Isn't that strange - you've answered the question yourself - well done!

5. ### Ghar Active Member

Mar 8, 2010
655
73
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
5,177
1,285
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.