The meter extension module is used in conjunction with the centralized controller to meet the needs of remote measurement, metering, leakage current detection, alarm and other functions of three-phase full power parameters. It is generally installed in the power distribution cabinet. The modular and innovative design can be quickly based on project requirements. Add corresponding functional modules to meet the needs of street lamp terminal intelligent management, save development equipment costs, flexibly configure high availability, realize terminal data meter parameter collection, monitoring and other applications, widely used in municipal street lamp monitoring, landscape lamp monitoring, industrial and mining enterprise lighting monitoring And other scenes, with good expandability.