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Nah, that was my best shot. . .Could you please give a practical example that I'd really measure negative active power on a certain load?
Don't really understand your question. Where have you found the term "negative active power"? Are you referring to a "negative power factor"?
The only thing that makes sense is a generator.
Negative active power is when the 'load' is an electrical generator.
If AP = V*I * PF, where V*I >=0, then AP < 0 if and only if PF < 0.
Didnt think i'd need to explain it.