RTU is the abbreviation of Remote Terminal Unit, translated into Chinese as a remote terminal device. In the power system, it is generally called a telecontrol terminal.
The power system telecontrol terminal generally has four remote functions such as telemetry, remote signaling, remote control, and remote adjustment. Microcomputer protection device, fieldbus type PLC controller, various distributed distribution terminals (such as AnyWay distributed measurement and control substation, etc.) belong to RTU.