Fault arc detector based on sound wave detection

The utility model discloses a fault arc detector based on sound wave detection. The detector comprises a sound sensor, a processing module and a display screen of a monitoring room, wherein the sound sensor is arranged on a lead insulating layer of a low-voltage power transmission line, the signal output end of the sound sensor is connected with the signal input end of the processing module, and the display signal output end of the processing module is connected with the signal input end of the display screen. According to the utility model, the sound sensor is arranged on the lead insulating layer of the low-voltage power transmission line, and used to collect sounds emitted by fault arc, and the sounds are processed by the processing module and then displayed on the display screen in the monitoring room, so that the fault arc of the low-voltage power transmission line is monitored in real time, and another fault arc detection manner is provided; and thus, the hidden safety troubles are reduced, accidents ar