The core applications of High-voltage composite insulator for transmission lines (string type) include phase spacers, jumpers, cross-arms, and line supports for overhead lines; composed of E-CR fiber-reinforced polymer rods, metal fittings, and HTV silicone rubber housing (including sheath and sheds), with corona rings equipped for voltages above 110kV to optimize electrical strength. Features strong hydrophobicity, low leakage current, no frequent cleaning required in contaminated environments, and low maintenance costs; owns proprietary patent formula for HTV silicone rubber and patented integral molding injection/sealing process, compliant with ANSI/IEC standards and customizable.
Composed of E-CR fiber reinforced polymer rod, metal fittings, and housing material (HTV silicone rubber); corona rings are equipped for voltage levels above 110kV.
Wide range of mechanical loads (70kN-550kN, etc.); lightning impulse withstand voltage, minimum creepage distance, etc., adapt to different voltage level requirements according to models.
HTV silicone rubber features patented formula and production process; adopts unique integral molding injection/sealing technology. It has strong hydrophobicity, excellent tracking and erosion resistance, low leakage current, and low maintenance cost.
Parameter Category | Key Indicators | Range/Description |
Voltage Class | HVAC | 69kV - 1000kV |
HVDC | ±400kV - ±1100kV | |
Mechanical Performance | Specified Mechanical Load (SML) | 70kN - 1000kN |
Electrical Performance | Lightning Impulse Withstand Voltage (BIL) | 365kV - 4500kV |
Minimum Creepage Distance | 1920mm - 70292mm | |
1-minute Wet Power Frequency Withstand Voltage | 220kV - 1650kV | |
Structural Dimensions | Section Length | 890mm - 16600mm |
Minimum Arc Distance | 700mm - 16000mm | |
Special Configuration | Corona Ring | Equipped for voltage ≥110kV (0 - 2 pieces) |
Material Composition | Core Rod | E-CR fiber reinforced polymer rod |
Housing | HTV silicone rubber (high hydrophobicity, high tracking and erosion resistance) |