XWP-160 155 300 400 20 100 50 42 120 145 130 ≈20 80 120 160 8.8 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 Electromechanical Electromechanical damage lh test not less than XWP-160 Suspension ceramic insulators XWP-160 suspension porcelain insulator corona inception voltage insulators although the extent of contamination unrelated [22], but the weather conditions and the size of the corona current measurement time historical conditions related to weather, so the signal processing should be taken to remove the effects of these factors on the measurement results.