Wire insulation detector

The utility model discloses a wire insulation detector. The device comprises a power supply, an electric brush piece, a clamping piece, a resistance monitoring device, a variable resistor and an electric wire traction device, the anode end of the power supply is abnormally connected with a variable resistor and an electric brush in series; the cathode end of the power supply is connected in serieswith clamping pieces; the resistance monitoring device comprises a current sensor, a voltage sensor, a single-chip microcomputer and a resistance display. The current sensor is connected in series with the variable resistor; wherein the voltage sensor is connected to the electric brush piece and the clamping piece in parallel, the current sensor, the voltage sensor and the resistance displayer are connected with the single-chip microcomputer, the electric brush piece, the electric wire traction device and the clamping piece are sequentially installed on an upper-layer installation platform ofthe supporting frame in p