High-Performance Insulator Silicone Rubber for Lightning Arrester Systems

Insulator Silicone Rubber for Lightning Arresters is a specialized material engineered for extreme electrical and environmental resilience. Designed to support injection molding, compression molding, and high/low-temperature vulcanization processes, it delivers exceptional aging resistance, hydrophobicity, and salt spray performance. With superior dielectric properties (≥22 kV/mm breakdown voltage) and flame-retardant ratings (FV-0/FV-1), this material meets ultra-high voltage requirements (up to 500 kV) and complies with global safety standards. Ideal for critical infrastructure in power transmission and lightning protection systems.

Product Advantages

1. Ultra-High Electrical Insulation：Breakdown voltage up to 22 kV/mm ensures reliability in high-voltage environments.

2. Hydrophobic Design：HC1-rated hydrophobicity prevents moisture-induced conductivity and surface contamination.

3. Flame Retardancy：Achieves UL94 V-0/V-1 ratings for fire safety in electrical applications.

4. Long-Term Durability：Withstands extreme aging, UV exposure, and salt spray corrosion (per IEC 61109).

5. Low Dielectric Loss：≤0.03 dielectric loss minimizes energy waste in high-frequency applications.

6. Customizable Processing：Compatible with multiple vulcanization methods (high/low temp, injection molding).

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. Lightning Arresters：Used in polymer-housed surge arresters for 10-500 kV substations.

2. Composite Insulators：Manufacturing suspension/station post insulators for transmission lines.

3. High-Voltage Bushings：Sealing and insulation components in transformers/switching equipment.

4. Outdoor Electrical Systems：Resistant to pollution flashover in coastal or industrial areas.

1. Curing Process：Mix with 1% (2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane) and vulcanize at 175°C ×5min under 15MPa pressure.

2. Post-Processing：Cool gradually to maintain dimensional stability (<4% linear shrinkage).

3. Quality Control：Verify hydrophobicity via HC1/HC2 tests per IEC 62073.

Q: What voltage levels does this material support?
A: Certified for applications up to 500 kV, compliant with IEC 61109/61952 standards.

Q: How does hydrophobicity enhance performance?
A: Prevents conductive water films, reducing leakage current and pollution flashover risks.

Q: Is it suitable for coastal environments?
A: Yes, its salt spray resistance exceeds 1,000 hours per ASTM B117.

Q: Can custom flame-retardant grades be provided?
A: Yes, FV-0 to FV-1 grades are available for different fire safety requirements.

WENZHOU HEFENG SILICONE RUBBER CO.,LTD

High-Performance Insulator Silicone Rubber for Lightning Arrester Systems

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