Types: Long rod composite insulator, tension & suspension insulator, line post, station post/busbar support insulator Composite insulator consists of three parts: Fiberglass core: ECR End fitting: Hot-dip galvanized forged steel and casting steel. Silicone rubber: HTV VOLTAGE RATING & STRENGTH RANGE 11kV up to 500kV. 40kN up to 300kN long rod type, 4kN up to 20kN post type. STANDARD TRONCO ELECTRIC insulators complied with the standard of IEC 61109 & IEC 61952 ADVANTAGES The use of composite insulators in place of traditional porcelain and glass insulators for line insulation has become widespread in the last 20 years. High temperature vulcanized (HTV) silicone rubber is dominating for transmission voltages. Lighter weight Lower cost Easier handling Better resistance to damage from vandals Superior contamination performance APPLICATION Long rod insulators are used for suspension and tension towers for high voltage grids and railway grids. Composite post insulators are used for disconnector, switchgear and substation works. Tronco Electric can also make the design and supply the insulator strings.