SLVUDF6 September 2025
For cumulative active energy and individual phase error testing, current is varied from 50mA to 15A, a phase shift of 0° (PF = 1), PF = 0.5i (inductive) and PF = 0.8c (capacitive) is applied between the voltage and current waveforms fed to the reference design. Based on the error from the active energy output pulse, a plot of active energy % error versus current is created for the three PF values.
For cumulative reactive energy error testing, a similar process is followed except that a phase shift of 90° (sin ? = 1i), sin ? = 0.5i (inductive) and sin ? = 0.8c (capacitive) are used, and cumulative reactive energy error is plotted instead of cumulative active energy error.