This application note describes the functionality of the SA2002D metering integrated circuit using the PM2002DP evaluation module.
This document serves as an application note for the PM2002DP Energy Meter Evaluation Module, which utilizes the SA2002D metering integrated circuit. It details how to configure the module to measure energy consumption and record it to a mechanical counter, including indicators for energy flow direction and metering activity via LEDs.
The guide covers the module's setup, including jumper configurations for selecting energy direction (positive, negative, or bi-directional) and rated conditions. It provides specific instructions for the analog section, detailing the design for measuring 220V/80A with precision better than Class 1, and explains the calculation and selection of external components such as current sense resistors, voltage sense resistors, and bias setting resistors.
| Rated Voltage | 220V |
|---|---|
| Rated Current | 80A |
| Precision | better than Class 1 |
| Shunt Resistor Voltage Drop | 50mV @ 80A |
| Voltage Divider Drop | 14V |
| CT Ratio | 1:2500 |
The module supports negative energy measurement, positive energy measurement, and bi-directional energy measurement.
A shunt resistor with a value of 50mV @ 80A was chosen for the application module.