The PRS-3351 intelligent feeder terminal independently developed by CYG SUNRI can provide the functions of fault detection, information upload, control command acceptance and execution. In addition to remote metering, remote signaling and remote control and line loss management, it also supports various FA methods and other distribution line state perception and edge processing function such as intelligent distributed feeder automation. The system can achieve power collection and control, fault detection, fault area location, isolation and power recovery in non-fault area, which can improve the reliability of power supply.