The EM600 plus series power smart meter is a set of online smart power monitoring devices that have reached the international advanced level. While monitoring the power line routine data, it can also monitor the power quality parameters of the power grid in real time. And continuous faults are accurately captured and judged to ensure the safe and reliable operation of the entire system. The device has high-precision full power collection, as well as harmonic analysis, fault recording, voltage swell and sag, unbalance, sequence component measurement and other power quality monitoring functions; it also has multiple rate power records and events Powerful and flexible statistical functions such as recording, extreme value statistics, and demand recording. Used in conjunction with the dedicated EasyPQA power quality analysis software, it is more convenient for users to monitor and analyze the dynamics of the power system in real time. The EM600 plus series electric power intelligent instrument has a color LCD display, which can display all electrical parameters in real time, and can be connected to the upper-level system through a network interface and a serial communication interface to form a complete automated monitoring system.