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Phase error with ADE7880 and Rogowski coils

Question asked by LoreBart on Jan 16, 2018
Latest reply on Jan 18, 2018 by ValeriaToff


I'm using an ADE7880 for a university project. The current sensors are Rogowski coils, therefore I turned on the digital integrator as explained in datasheet (DICOEFF and CONFIG registers). To calibrate the device, I used a single phase calibrator and I saw that measured phase is wrong: there is an error of about 6 degrees. To find the source of error I turned off the integrator and I imposed, with calibrator, a current with -90° phase angle (to compensate Rogowski coils); I saw that in this case there aren't any phase errors. Why the digital integrator introduces these errors?