Overhead distribution line fault monitoring system

The present invention discloses an overhead distribution line fault monitoring system comprising a a primary station, the master station is connected to one or more sub-station, each slave station is connected to three sub-fault detection, fault detection sub-three were connected to the three phase circuit; if the initial sub-fault detection failure detection signal, determines the measured line; initial failure information integrated three-phase fault detection sub-sub-station, determining a final failure information; storing the entire main stand topology overhead distribution lines on the final display fault and the fault type, and alarm. The present invention has real-time, saving resources, etc., it can be widely used in distribution lines.