What is the thickness requirement of the insulation board in the distribution room?
Electrical properties and thickness requirements of insulating rubber sheets:1, 500V below the distribution room, choose 5mm insulation board, power frequency withstand voltage test 3500V1 minutes, not breakdown; in power frequency voltage test 10000V, 20S shall not breakdown.2, 10KV below the distribution room, choose 8mm insulation board, power frequency withstand voltage test 10000V1 minutes, not breakdown; in power frequency compression test 18000V, 20S breakdown.3, 35KV below the distribution room, choose 10--12mm insulation board, power frequency withstand voltage test 15000V1 minutes, not breakdown; in power frequency compression test 26000V, 20S breakdown.
Insulation board color: generally black based, followed by: green, red, blue, yellow. Choose according to different design requirements.
General appearance requirements:1, the insulation plate edge neat, no crack.2, bubble per square meter range, the area of less than 1 square centimeter of bubble may not exceed 5. The spacing between any two bubbles shall not be less than 40mm.3. The depth and length of the impurity shall not exceed 1/6 of the thickness of the insulating plate.
