The highest voltage level of transmission lines in China is gradually increasing from 500kV to 750kV (up to 1000kV). Every time the voltage of transmission and distribution lines rises by a level, the insulation system of power equipment also needs to be upgraded. High performance insulation materials are the first guarantee for stable operation of electrical equipment from power generation, power transmission and transformation. Friend’s materials with high quality performance are used in high-voltage SVG cabinet and 1000kV UHVDC flexible DC converter valve.