Electric power circuit insulation fault early warning device

The invention discloses an electric power circuit insulation fault early warning device. The electric power circuit insulation fault early warning device comprises a core-passing type traveling wave sensor, a traveling wave signal detection unit, a high-accuracy GPS synchronous clock unit and an electric power circuit insulation fault early warning host. The electric power circuit insulation fault early warning device is based on the accurate traveling wave positioning technology, the traveling wave positioning technology maturely applied to an electric transmission line is embedded into the insulation fault early warning device, and the insulation fault early warning accuracy is improved; faulted traveling waves belong to transient state jump signals, the frequency range ranges from 10 kHz to 2 MHz, the faulted traveling waves have the advantages of being high in speed, large in data amount and the like, and the abundant faulted information enables insulation fault early warning to be easily achieved; the core-passing type traveling wave sensor is high in detection sensitivity, small in positioning error and high insulation early warning reliability; the arrival time interval between the traveling wave signal amplitude and two homonymous traveling wave signals serves as an insulation early warning basis, accurate judgment on the insulation early warning degree can be achieved, and the electric power system insulation early warning level is improved.