This product is a three-phase AC power meter with a display and can be connected to the standard signal of voltage and current transformers or directly connected to the AC signal of 5A current and 500V voltage, and through special DSP chip fixed-point processing, high-speed, high-precision AD acquisition, multiple wiring methods can be selected, it can simultaneously measure three-phase AC current, three-phase AC voltage, three-phase active power, three-phase reactive power, three-phase apparent power, three-phase power factor, frequency, harmonics, three-phase active energy, three-phase reactive energy and three-phase total energy. Output functions can select analog output, communication output and cumulative pulse output functions, equipped with RS232/485 communication interface, support standard MODBUS RTU communication protocol, can be networked to realize centralized management of data.