Calculating Three Phase Power for an Asynchronous Motor-Generator

AI Thread Summary
The discussion focuses on measuring three-phase power in an asynchronous motor-generator, specifically addressing the power readings from Phase 1 and Phase 3. The positive power reading for Phase 1 and the negative reading for Phase 3 may be attributed to a high power factor (cos φ). To calculate the power for the second phase (L2), it is noted that each phase contributes one-third of the total power. Understanding these dynamics is crucial for accurate power measurement and analysis in three-phase systems. Accurate calculations ensure efficient operation of the motor-generator setup.
jimmynora
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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
 
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1) Because you probably have an high cos \phi
2) Each phase has 1/3 of the total power.
 
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