As a world-leading supplier of composite insulators, we possess full industrial chain production and integrated control capabilities. The composite insulators we produce strictly comply with mainstream standards such as GB/T, IEC, and ANSI.

What are Composite Insulators?

Composite insulators, also known as synthetic insulators or polymer insulators, are essential devices used in power transmission and distribution systems to support conductors and insulate them from towers. Unlike traditional porcelain or glass insulators, they utilize polymer material technology, offering significant advantages such as light weight, high strength, and excellent anti-pollution performance. They are widely used in high-voltage and ultra-high-voltage transmission lines.

Compared to traditional porcelain or glass insulators, the advantages of composite insulators are very clear:

• Self-cleaning (Anti-pollution flashover): Relying on the hydrophobicity transfer of silicone rubber, even if dust accumulates on the surface, the dust becomes hydrophobic, greatly reducing maintenance costs.

• Light Weight: The weight is only 1/7 to 1/10 of porcelain insulators, significantly reducing requirements for personnel and construction equipment at the site while lowering the load on the tower.

• Unbreakable: They possess good toughness and are not easily damaged during transportation and installation.

Composite insulators consist of the following three main parts:

Core Competitiveness

We are a world-leading composite insulator supplier because we don't just manufacture the final products; we also produce our own end fittings, core rods, and silicone rubber compounds.

Click the links below to experience our manufacturing strength and production site via our 360° panoramic digital workshop.

Our Core Business: Sales of finished/semi-finished composite insulators · Turnkey EPC projects for composite insulator production lines.

Global Footprint: We have successfully built 7 insulator factories in the following countries:

• South America: Argentina

• Asia: Thailand, Turkey

• Africa: Ethiopia, Morocco, Tanzania

• Europe: Bulgaria

Main Application Areas

1. High-Voltage and Ultra-High-Voltage Transmission Lines

This is the primary application field for composite insulators.

• Suspension and Tension: On AC and DC transmission towers ranging from 10kV to 1100kV (UHV), composite insulators are used to suspend conductors and withstand tension.

• Compact Lines: Due to their light weight and high mechanical strength, they are ideal for compact transmission lines in urban areas or corridors with limited space.

2. Heavily Polluted and High-Rainfall Areas

This is the "specialty" area where composite insulators outperform porcelain insulators.

• Coastal Areas: Resisting salt spray corrosion.

• Industrial Pollution Zones: In areas with heavy dust pollution such as chemical plants and mines, their self-cleaning (hydrophobic) properties effectively prevent pollution flashover.

• Rainy/Foggy Regions: Reducing leakage current under high-humidity weather conditions.

3. DC Transmission Projects (UHVDC)

In long-distance DC transmission, insulator pollution accumulation is more severe than in AC transmission.

• Composite insulators exhibit excellent electro-corrosion resistance under DC voltage, making them the preferred solution for UHVDC projects (such as ±800kV and above).

4. Substations and Distribution Networks

• Composite Post Insulators: Used for disconnectors and busbar supports in substations, significantly improving the seismic resistance of station equipment.

• Distribution Automation: In 10kV - 35kV urban and rural distribution networks, composite insulators are popular due to easy installation and maintenance-free operation.

5. Electrified Railways and Rail Transit

• Catenary Systems: In railway catenaries, composite insulators provide insulation while withstanding the mechanical stress caused by high-frequency vibrations from pantographs.