Composite Insulator for Transmission Lines (String Type)

Composite Insulator for T/L (String Type)

High-voltage composite insulator for transmission lines (string type) for transmission lines, suitable for AC/DC transmission lines of 69kV and above, up to AC1000kV/DC1100kV UHV scenarios.

Product Presentation

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.

Product Feature

Technical Specifications

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)

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