Basic technical indicators of insulating contact box
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∙ Insulation Contact Box The contact area must reach the ±2% error range of the design value, and the surface roughness must be controlled at Ra ≤ 1.6μm
∙ The dynamic contact pressure test value should be 25N±10%, and the pressure fluctuation must not exceed 15% of the initial value
∙ The silver tin oxide material must comply with the YS/T 946 standard, the silver content must be controlled at 88±0.5%, and the total content of impurity elements <0.3%
∙ The insulating shell must withstand a 3kV/1min power frequency withstand voltage test, and the partial discharge must be ≤5pC
∙ The creepage distance between the conductive part and the shell is based on GB/T 16935.1, and the value is 10mm/kV
