Engineering A question about a three-phase circuit

AI Thread Summary
The discussion revolves around understanding the calculations in a three-phase circuit, specifically focusing on the magnitude of currents I₁ and I₂. The participants note that adding I₁ and I₂ without considering their phase angles is incorrect, as one load has a leading power factor while the other has a lagging power factor. There is confusion about the concept of "similar in phase," which is clarified to mean that the voltages S1 and V1 are aligned, allowing for magnitude calculations on the real axis. The participants acknowledge the need to address the phase differences to accurately combine the currents. Overall, the conversation highlights the importance of phase considerations in three-phase circuit analysis.
Shloa4
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I'll be happy for some help here.
Thanks. :redface:
 

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Shloa4 said:
For now, I am only focused on the magnitude.
So am I. :smile: You have added I₁ + I₂ without regard for their different angles.
 
oops.. :) but still, S1 and V1 are similar in phase, aren't they? And since that's the case, S/V yields magnitude only (on the real axis). Same for both loads. And since the phase becomes 0 for both I1 and I2 (which is wrong obviously, but I cannot figure out where exactly I miss a thing here) so I can add I2 to I1.
That's probably my problem here. Any idea?
 
What does "similar in phase" mean exactly http://img820.imageshack.us/img820/9631/icon5j.gif

The details are that one load has a leading pf and the other a lagging pf.
 
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