Multi-function power instrument, a multi-functional intelligent power instrument with programmable measurement, display, RS485 digital communication and electric energy pulse output, capable of completing three-phase electrical parameter measurement (three-phase voltage, three-phase current, active power, reactive power, apparent power, power factor, frequency, etc.), harmonic measurement, power grid quality analysis (voltage peak factor, current K factor, telephone waveform factor, voltage and current imbalance degree, voltage and current sequence, etc.). The measurement accuracy is 0.5 level, realizing LCD field display and remote RS-485 digital interface communication, adopting standard DL/T 645-2007 or MODBUS - RTU communication protocol.

Smart meter is one of the basic equipment for data acquisition of smart grid (especially smart distribution grid), undertakes the tasks of original energy data acquisition, measurement and transmission, and is the basis for information integration, analysis optimization and information display. In addition to the basic power consumption measurement function of traditional electric energy meter, the intelligent meter also has the intelligent functions such as two-way multi-rate measurement function, user terminal control function, two-way data communication function of multiple data transmission modes and electricity theft prevention function to adapt to the use of intelligent grid and new energy.The advanced measurement infrastructure (AMI) and automatic meter reading (AMR) systems built on the basis of intelligent meters can provide users with more detailed electricity consumption information, so that users can better manage their electricity consumption, so as to save electricity costs and reduce greenhouse gas emissions; The electricity retailers can flexibly formulate the time-sharing electricity price according to the user's demand, and promote the reform of the electricity market price system; Distribution companies can detect faults more quickly and respond in a timely manner to strengthen power network control and management.

Factory, residential area, shopping mall, apartment, school and dormitory