XHP-100 160 280 430 16 100 50 42 120 135 120 ≈20 50 75 100 7.9 Type Main dimensions mm frequency voltage kV rms no less than full-wave lightning impulse voltage kV peak pressure of not less than the increase rate% flashover 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 tests lh electromechanical test not less than for many electrical and mechanical damage due to salinity Chemical electric ion etching, contamination caused by lead off shares of visual inspection, there are shades of black spots found on the strand, some tiny metal nodules adhered to fracture the surrounding strands, some places even two strands burn Melting phenomenon connected together. Fuse the fracture is irregular shape, whether positive off ramp off the fracture has traces of slag or slag, breaking marks on display in a molten state, smooth section, a large number of melt holes, pull off the edge characteristics, indicating the fracture have been subjected to high temperatures melted. The fracture electron microscopic observation of samples were found to fracture the samples revealed the grain boundaries, gathered more pores Displaying reduce heat organizational structure, a normal sample and rarely obvious grain boundary pores.