Research on Safety Protection of live working robot on 10kV Distribution Line

Aiming at the live working robot which is fixed in insulating aerial device and works on 10kV distribution line, in this paper, the conventional method is used for insulation coordination to determine the insulation level of the robot's live work. Based on the experiments of typical air gap sparkover and insulation creeping discharge to simulate robot operation process, the safety protection design requirements of 10kV system live working robots are proposed. The main conclusions are: The switching impulse withstand voltage of main insulation should be at least 45kV of phase to earth and 66.4kV of phase to phase, and the power frequency (AC50Hz) withstand voltage of secondary insulation should be at least 15.2kV(RMS). The minimum electrical distance of the air gap as main insulation is 10.7cm of phase to earth and 15.9cm of phase to phase, and the minimum creepage distance of the robot arm's insulation shell as secondary insulation is 3cm. Recommended minimum safety distance of 10kV system robot for live work is not less than 0.2m. According to the above conclusions, the insulation shell for robot arm that can meet the requirements of corresponding withstand voltage are developed and experimental verified.