Power line fault alarm device and method thereof

The invention discloses a power line fault alarm device and method, and relates to the technical field of alarm devices, and the device comprises a line fault indicator which comprises a current sensor, a voltage sensor, a processing chip and a wireless module. Through mutual cooperation of a gear, a gear ring, a supporting ring, a connecting ring, a supporting pipe, a second rotating shaft, a connecting plate, a first rotating shaft, a mounting block, a movable block and a roller, a cable can be positioned, and through mutual cooperation of a current transformer, a line fault indicator, a processing chip, a current sensor, a voltage sensor, an alarm lamp, a wireless module and a temperature sensor, the cable can be positioned. Therefore, false alarms caused by environmental factors or transformer harmonic waves are reduced, the possibility of false alarms of the transformer harmonic waves is eliminated, false alarms caused by high sensitivity of the current sensor and the voltage sensor are avoided, the faul