Description

The design implements a low-cost single- or dual-phase electricity measurement solution. The design separates a small metrology MCU from the host MCU: providing both protection from the AC mains and also isolation of the energy measurement function from corruption by other software. The small: low-cost metrology MCU achieves IEC/ANSI Class 1 accuracy and calculates active and reactive power and energy. This design is implemented using Current Transformer sensors for single and dual-phase measurement. It can also be easily modified for single-phase measurement with shunt resistor sensors.