ME237R three-phase panel-type multifunctional power meter supports direct current or external open Rogowski coil or voltage CT type input, which can realize cable-free testing, simplify testing steps and save construction costs. ME237R supports three-phase three-wire and three-phase four-wire systems; it can measure current, voltage, power factor, harmonics, power, energy and other electrical parameters of A, B, C phase network. The standard RS485 communication interface can be compatible with various configuration systems through standard Modbus RTU protocol. The electrical parameters collected by the front-end can be transmitted to the system data center in real time.