1
\$\begingroup\$

So this feels like a silly one but I'm absolutely stuck. I'm trying to balance the power between a 3 phase source and two 3 phase loads in parallel. One is a Wye and the other is a Delta: layout So I figured out that the single phase source current is 5A per branch, so the source complex power is (3*120V*5A) = 1800 W and 0 var.

The problem comes when I try to find the load draw. It's easy enough to find the delta line-to-line voltage and the current going through the phases of the loads: V and I calcs

When I go to sum the powers, though (including line impedance), I get a strange answer that doesn't balance: power calc

Does someone see my obvious mistake?

Thanks!

\$\endgroup\$
1
\$\begingroup\$

Never mind, answered my own question. My line impedance power calc should have been 3*I^2*Z.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.