two loads:
100 VA w/ 0.9 PF
100 VA w/ 0.8 PF
Total Load is 200 VA with 0.85 PF, correct?

Another case:
250 VA w/ 0.75 PF = 187.5 W
150 VA w/ 0.90 PF = 135 W
Total load is 400 VA, 322.5 W, PF = 322.5/400 = 0.80625

 

Both results above are correct.

 

Thanks, donpetru

Any other members want to confirm, please?

 

Actually, I think they're wrong. See http://forum.allaboutcircuits.com/showthread.php?p=669930

 

You can't just add apparent powers. You've already been told this in another thread.

You also need to indicate whether the power factors are leading or lagging.

 

Thanks... actually, this post was first.. then after some research I wanted to clarify, and posted the other thread http://forum.allaboutcircuits.com/showthread.php?p=670012#post670012.

Dually noted on the leading/lagging .

 

Oh. Okay. They probably could have been kept in a single thread -- but no biggie one way or the other.