Rail mounted power meters are a reference GB/T 17215.211- 2006、GB/T 17215.321- 2008、GB/T 15284 - 2002、GB/T 29318-2012 Designed according to national standards and installed using standard guide rails, it is mainly used for electrical parameter measurement in single-phase AC/DC or three-phase low-voltage networks. As a multifunctional power meter, it can simultaneously measure various power parameters such as voltage, current, active power, reactive power, power factor frequency, and electrical energy in single-phase or three-phase power networks. All measured power parameters can be remotely transmitted through the optional RS485 communication interface, facilitating users' electricity monitoring, management, and centralized meter reading. This series of instruments can be conveniently installed in the terminal distribution box for electricity use as terminal management instruments.