The invention discloses an externally applied
signal recognition type
fault indicator. The externally applied
signal recognition type
fault indicator comprises an acquisition unit arranged on a circuit and a collecting terminal in communication connection with the acquisition unit, the collecting terminal is used for collecting data sent by the nearby acquisition unit and reporting the data to a background, and the acquisition unit comprises a CT
electricity taking device, a
power management module, an MCU, a
wireless communication module, an analog sampling module, a fault logic judgment module and an alarm, wherein the CT
electricity taking device is used for supplying power, the
power management module is connected with the CT
electricity taking device, and the
wireless communication module, the analog sampling module, the fault logic judgment module and the alarm are connected with the MCU separately. The invention further discloses a grounded
short circuit location method which can locate accurate fault location points. The externally applied
signal recognition type
fault indicator and the grounded
short circuit location method have the advantages that fault lines and fault points can be quickly indicated, the labor intensity of line patrol walkers is reduced, and the
troubleshooting time is shortened; the duration of power outage is reduced, and the power supply quality is improved so as to avoid the
impact of traditional multiple switching-off, switching-on and line patrol on
power equipment; the line fault indicator directly detects signals online, thereby not affecting the normal operation of a
power grid, the movement is sensitive and accurate, and the anti-interference capability is strong.