Drawings and Instructions
Wuhan Line Power was established in 2008 and has over 17 years of continuous experience in manufacturing composite suspension insulators with rated voltages of 69 kV and above. We have supplied these high-voltage insulators to power companies in more than 50 countries. Our factory is certified with ISO 9001 quality management system, ensuring reliable quality and performance.
Standard：IEC 61109 Insulators for overhead lines – composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V – Definitions, test methods and acceptance criteria
Test reports
The composite suspension insulator can successfully pass all the following design tests:
Design Test
Test on interfaces and connections of end fittings (per IEC 61109)
Dry power frequency voltage test
Sudden load release pre-stressing
Thermal-mechanical pre-stressing
Water immersion pre-stressing
Verification test
Visual examination
Step-front impulse voltage test
Test on shed and housing material (per IEC 61109)
Accelerated weathering test
Tracking and erosion test
Hardness test
Flammability test
Test on the core material
Dye penetration test (per IEC 61109)
Water diffusion test (per IEC 61109)
Resistance to chemical attack (per IEC TR 62039)
Assembly core load time test (per IEC 61109)
Determination of the average failing load of the core of the assembled insulator
Control of the slope of the strength-time curve of insulator
Type Test
Electrical test (per IEC 61109)
Dry lightning impulse withstand voltage test
Wet power-frequency test
Advantages
1. High-Performance Insulator Core
Our insulator core delivers exceptional mechanical & electrical strength, with zero internal voids, impurities, or manufacturing defects. Crafted from boron-free electrical-grade glass fiber resin rod (E.C.R. Glass), it meets the rigorous chemical resistance requirements of IEC TR 62039, ensuring long-term stability in harsh environments.
2. Durable Housing & Shed
Premium Material: Made of high-temperature vulcanized (HTV) silicone rubber for superior durability.
All-Weather Protection: Engineered to resist UV degradation, external pollution, and high humidity-ideal for extreme operating conditions.
Secure Bonding: The housing and core rod are chemically bonded, eliminating interface separation risks.
Customizable Color: Gray/Red.
3. Robust Metal Parts & Finishing
Optimized Mechanical Design: Metal end fittings are precision-engineered to transfer load evenly to the core, ensuring consistent mechanical strength (corona ring-equipped models are fully supported).
High-Quality Materials: Forged steel (meeting ASTM A123/A123M-02, ASTM A153/A153M-02 standards) is used for metal components (except split pins, which use bronze, brass, or austenitic stainless steel), guaranteeing corrosion resistance and structural integrity.
Permanent Sealing: A reliable sealing system at the metal fitting-housing interface blocks contaminants, moisture, and foreign materials-preventing internal degradation and extending service life.
Official certification, professional after sales service.
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