Calculating Three Phase Power for an Asynchronous Motor-Generator

[jimmynora]

Hi

We are measuring 3 Phase Power of an asynchronous Motor-Generator and have equipment installed on Phase 1 (L1) and Phase 3 (L3) to measure the current/voltage/power. I have some questions regarding the results.

Q) Why is the Power of Phase 1 positive and Phase 3 Negative ?

Q) How can I calculate the power of the second phase (L2) from these results?



Thanks
JN

 

[Quinzio]

1) Because you probably have an high $cos \phi$
2) Each phase has 1/3 of the total power.