Ultra-High Voltage Silicone Rubber Insulator with Dynamic Hydrophobic Recovery

Engineered for ±1100kV UHV transmission systems, this silicone rubber insulator redefines grid reliability through multi-layer molecular architecture. Featuring CTI 600+ tracking resistance and self-restoring HC2 hydrophobicity, it exceeds IEC 62217 requirements with <0.01% annual erosion rate under 50kA impulse currents. Certified for 8000m altitude operation, the material integrates nano-alumina reinforcement for 65% reduced corona erosion compared to conventional HTV silicone.

Product Advantages

1. Dielectric Stability：Maintains ≤3.8 dielectric constant across -60°C~300°C thermal cycling.

2. Anti-Icing Surface：Ice adhesion strength <10kPa through biomimetic micro-cavity design.

3. Seismic Resilience：Withstands 9-level earthquakes (per GB 50260) via graphene-enhanced fiber core.

4. Field-Repairable：UV-curable surface treatment restores hydrophobicity in 15 minutes onsite.

5. Radiation Tolerance：Retains 90% mechanical strength after 10MGy γ-ray exposure (ASTM E668).

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. Global Energy Internet: Composite cross-arm insulators for ±1100kV UHV DC lines from Zhundong to Southern Anhui.

2. Nuclear power containment: Radiation-resistant sealed bushings for LOCA accidents.

3. Offshore converter stations: Salt-spray-resistant DC wall bushings.

4. Intelligent monitoring system: Digital insulators with integrated Brillouin scattering optical fiber.

1. On-site installation: Use torque gradient tightening technology (25Nm→50Nm→80Nm) to control interface stress.

2. Operation monitoring: Deploy a distributed acoustic sensing system (DAS) to detect mechanical creep in real time.

3. Life assessment: Combine LDA laser diffraction method to measure the surface microcrack growth rate.

Q: What voltage levels does this UHV silicone rubber insulator support?
A: Specifically engineered for ±800kV to ±1100kV UHV DC systems and 1000kV AC EHV networks, meeting State Grid Corp's SGCC 1119-2018 specifications for 500kV+ applications.

Q: How does it prevent pollution flashover in coastal areas?
A: Features HC1 hydrophobicity classification with contact angle >100°, combined with nano-SiO₂ filler technology reducing salt deposit density by 85% (per IEC TS 60815-3).

Q: What certifications validate its dielectric performance?
A: Certified under IEC 62217 with <0.02% partial discharge at 1.5Ur, achieving C4 pollution class compliance per IEC/TS 60815-1.

Q: How to maintain insulation performance long-term?
A: Implement annual thermography scans + 5-year hydrophobicity recovery treatment using mobile silicone spraying units per CIGRE TB 815 guidelines.

Q: Does the material contain environmentally harmful substances?
A: Fully compliant with EU RoHS 3 (2015/863) and China GB/T 26572-2021, containing 0% halogens with 100% recyclable core components.

WENZHOU HEFENG SILICONE RUBBER CO.,LTD

Ultra-High Voltage Silicone Rubber Insulator with Dynamic Hydrophobic Recovery

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