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ADE7758 Active power calculation

Question asked by JochenR on Oct 12, 2012
Latest reply on Oct 24, 2012 by hmani
Branched to a new discussion

We're using the ADE7758 for active power calculation based on the line accumulation mode of the chip.

It seem's to us that the received values of the xWATTHR register via SPI are too small.

We have a load with approx. 3KW, CT=2500, xWATTR shows dec. 30 in one cycle.

We do line accumulation every 2 zero crossings ( = 1 line period).

Can also anybody tell the relationship between Vrms, Irms an the values in xWATTHR?


Does anybody have an idea?


Best Regards,