基于磁保持继电器的单相智能电能表外接负荷开关应用分析

摘要

介绍单相智能电能表外控技术要求和磁保持继电器技术特点,详述了磁保持继电器有源隔离驱动电路的工作原理,分析了外置开关的通断状态检测的实用方法,并指出了单相智能电能表技术规范应补充的具体内容.%To introduces the technology requirements of the external control about single - phase smart meter and technical characteristics of magnetic latching relay, details the working principle about the active - isolated driving circuit of the latching relay, analyzes the practical methods about the detection of external switching condition, and pointed out the specific content should be added to technical specifications of single - phase smart meter.