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Sign of reactive power - ADE7878

Question asked by larsulrikhune on Jan 13, 2015
Latest reply on Jan 14, 2015 by dlath

Hi there,

 

I have a question regardign the sign of reactive power..

 

I have made some final tests, all looks fine, but one thing I do get confused about...

 

When I apply a signal with a "lagging" current waveform, I would expect a negative Q, and when applying a waveform with a leading current waveform, i would expect a positive Q, but the read-outs from the ADE7878 are quite opposite..

 

I have made some drawings and a screen dump of my scope, while adding the leading and lagging waveform. This one is attached.

 

 

 

Could You please help me, what I am missing here? (Sorry for the newbee question :-))


Kind regards, Lars Ulrik Hune

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