XWP7-160 170 340 545 20 110 55 50 120 160 135 ≈20 80 120 160 12.0 Main dimensions (mm) frequency voltage kV rms no less than full-wave lightning impulse voltage kV peak pressure of not less than flashover increase rate (%) Tensile mechanical load (kN) Weight (kg) structural height (H) disc diameter (D) Nominal creepage distance (L) connection type labeled stem wet flashover flashover breakdown 1min wet withstand 50% flashover withstand routine test lh electromechanical electromechanical test is not less than the destruction to further improve the reliability of detection by the size of the leakage current value of XWP7-160 hanging ceramic insulator strings insulation condition preliminary test design, while also considering the sleeve insulator design online Detection system: measuring the pulse corona current measurement while leakage current insulator strings, and add some impact to judge the accuracy of the measurement of external factors, the use of fuzzy set theory to give different external disturbances were different membership to consider insulator The insulation condition.