The transient oscillograph fault indicator is applied in the field of fault location of overhead lines. It is a distribution automation product integrating wireless radio frequency communication, small current power acquisition, low power consumption, high frequency sampling and other technologies. This product solves the problems of short circuit fault detection of overhead lines and single-phase grounding positioning, and has the real-time monitoring function of line load. The single-phase grounding fault can be located locally or at the main station by capturing the transient waveform signal at the time of fault occurrence. The acquisition unit is designed in suspension type and has the function of self-powering, which has a wide range of applications.