Recently I've been working on phase calibration with ADE7758. I have an algorithm that works pretty good, but I've been worried as when measuring phase A under a 3-wire Delta configuration with resistive load it seems to acumulate very little in AWATTHR (like 2048 d) and an order of magnitud bigger in AVARHR, only possible if a big phase shift exist. The Load is connected in wye, and a there is indeed a phase shift between VAB and IA of 30 degrees (which is correct), but I have like 54 DEGREES ERROR to compensate! (I'm measuring 84 degrees)
The extrange thing is when measuring VCB and IC, I have a more reasonable result, with a measured angule of -37 degrees, only 7 degrees error...
I am using phase B as reference in my system, the conection used is the one shown in AN-639 for 3-wire DELTA and the COMPOMODE register is set 0x00.
Hope someone can give me a hand with this!