A digital input electricity energy measurement standard

A measurement standard of digital input electricity energy based on the analog based method was developed in NIM China. The resistive voltage divider and current shunt with capacitor compensation were adopted; the non-integral period sampling technology was used to reduce the algorithm error. The working frequency of this standard is 45 to 65 Hz, the voltage range is 60 V to 380 V and current range is 0.2 A to 20 A.