Insulator Silicone Rubber For Transmission Line

Insulator Silicone Rubber is widely used for transmission lines due to its excellent electrical insulating properties, durability, and environmental resistance. This material is favored over traditional ceramic insulators due to its lightweight, high hydrophobicity, and ability to withstand extreme weather conditions.

Product Advantages

1. Superior Electrical Insulation:Silicone rubber insulators provide high dielectric strength and electrical performance, suitable for high-voltage transmission lines up to 550kV.

2. High Weather Resistance:Resistant to UV rays, ozone, and pollution. Silicone rubber insulators maintain performance even in harsh environmental conditions, such as high humidity or salty coastal regions.

3. Aging and Mechanical Stability:Durable under prolonged use, with excellent aging resistance. Tests reveal minimal wear even after years of exposure to electrical stress and environmental conditions.

4. Hydrophobicity:Silicone rubber’s surface remains water-repellent, reducing the formation of conductive water films on the surface. This characteristic ensures reliable insulation performance during rainy or wet conditions.

Type number	HF-230A	HF-230B	HF-230C	HF-270
Shore A	60±3	60±3	60±3	60±3
Duro	180±20	180±20	160±20	180±20
Density(g/cm³)	1.45±0.05	1.45±0.05	1.5±0.05	1.55±0.05
Tensile (MPa)	≥4.5	≥4	≥4	≥4
Elongation(%)	≥270	≥230	≥180	≥300
Compression (%)	≤6	≤6	≤6	≤10
Tear (kN/m)	≥10	≥10	≥8	≥8
Rebound(%)	≥55	≥50	≥50	≥45
Flame Retardant	FV-0	FV-0	FV-1	FV-1
Breakdown (kV/mm)	≥22	≥20	≥15	≥15
Dielectric Constant	≤4.5	≤5	≤5	≤5
Volume Resistivity (Ω·cm)	≥1×10¹⁴	≥1×10¹⁴	≥1×10¹⁴	≥1×10¹⁴
Hydrophobicity	HC1	HC1	/	/

1. High-Voltage Transmission Lines:Used for suspending and insulating power lines in networks operating at voltages of up to 550kV.

2. Polluted Environments:Ideal for coastal and industrial areas where high pollution levels affect traditional insulators.

3. Electrical Substations:Applied in insulator posts, bushings, and other high-voltage components for substations.

4. Extreme Weather Conditions:Performs effectively in extreme temperatures, making it suitable for use in deserts, mountains, and cold regions.

Material Characteristics:

High mechanical strength and low weight, ideal for suspending heavy power lines.

Hydrophobic coatings ensure long-term reliability and reduced maintenance costs.

Testing and Performance:

Rigorous testing for electrical, mechanical, and aging properties ensures performance under global transmission standards.

Evaluation of 230kV transmission line insulators highlights excellent aging resistance over time.

Q: Why is silicone rubber preferred for transmission line insulators?

A: Silicone rubber offers superior dielectric strength, hydrophobicity, and lightweight construction compared to traditional ceramic insulators. Its environmental resistance and low maintenance needs make it ideal for modern transmission systems.

Q: What is the voltage range for silicone rubber transmission line insulators?

A: They are suitable for voltage ranges up to 550kV, depending on the design and application.

Q: How does silicone rubber perform in polluted environments?

A: Silicone rubber, especially with RTV coatings, performs exceptionally well in polluted environments by resisting contamination and maintaining its hydrophobic properties.

Q: Can silicone rubber insulators handle extreme weather?

A: Yes, silicone rubber maintains its electrical and mechanical performance in extreme temperatures, UV exposure, and high humidity.

Q: What standards do silicone rubber insulators comply with?

A: They comply with global standards such as IEC, ANSI, and CSA, ensuring reliable and safe performance in transmission systems.

WENZHOU HEFENG SILICONE RUBBER CO.,LTD

Insulator Silicone Rubber For Transmission Line

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