330kV Nano-Coated Silicone Insulator for Extreme Weather

Engineered for 330kV transmission systems in coastal/industrial zones, this insulator features multi-scale reinforced architecture combining alumina trihydrate (ATH) filler and polydimethylsiloxane (PDMS) matrix. Achieves C4 pollution class compliance per IEC TS 60815-3 with ≤0.8mg/cm² salt deposit density threshold. Certified for 2,500mm annual rainfall environments through patented surface morphology design reducing leakage current by 72% (tested per GB/T 24622-2022).

Product Advantages

1. Icing Defense：Biomimetic shark-skin surface texture limits ice accretion to ≤3mm thickness under -15°C Rime Ice conditions.

2. UV Stabilization：Incorporates benzotriazole derivatives maintaining ≥90% tensile strength after 5,000hr QUV accelerated weathering.

3. Partial Discharge Control：Achieves <1pC discharge magnitude at 1.7Ur through optimized field grading layers.

4. Seismic Tolerance：Fiberglass core with 1.5° elastic deflection accommodates 8-magnitude earthquakes (GB 50260-2013).

5. Eco-Adaptive：Hydrophobicity transfer index (HTI) ≤2.0 prevents contamination migration in fog-humidity cycles.

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. Smart grid transformation: Salt spray-proof post insulators for 330kV substations in coastal areas.

2. New energy grid connection: Weather-resistant DC wall bushings for offshore wind farms.

3. Industrial corridors: Self-cleaning suspension composite insulators for transmission lines in highly polluted areas.

4. Smart operation and maintenance: Digital insulator asset management system with integrated RFID chips.

1. Surface treatment: Plasma activation is used to enhance the interface bonding between the glass fiber core rod and the silicone rubber.

2. Vulcanization control: Three-stage gradient vulcanization eliminates internal bubbles.

3. Online detection: Deploy AI visual system to monitor the quality of shed molding in real time.

Q1: What certifications ensure the safety of 330kV silicone rubber insulators?

A: Our material meets IEC 62217 for polymeric HV insulators and GB/T 24622-2022 artificial pollution tests. Certified for Class C4 pollution resistance (up to 0.8mg/cm² salt deposit density) and UV stability per ASTM G154 (5,000hr exposure).

Q2: How does the HC1 hydrophobicity prevent flashovers?

A: The hydrophobic surface achieves contact angle >100° and HTI ≤2.0, rejecting 92% water film formation. Combined with our patented nano-roughened texture, it reduces leakage current to <15mA under heavy contamination (per IEC TS 60815-3).

Q3: Can these insulators withstand extreme temperatures?

A: Optimized for -50°C to 300°C operation:

Low-Temp Flexibility: Passes 100,000 cold-bend cycles at -60°C

High-Temp Stability: ≤6% compression set after 200hr@300°C

Q4: What seismic performance can be expected for 330kV systems?

A: Designed per GB 50260-2013, the fiberglass-reinforced core withstands 8.0 magnitude earthquakes with:

Seismic Margin Factor: 2.5× design basis

Deflection Tolerance: 1.5° axial rotation

Q5: Are custom hardness variants available?

A: Shore A hardness adjustments (50-80) are possible for specific applications:

Soft variants: Enhanced corona resistance (≤2pC PD at 1.7Ur)

Hard variants: 30% higher tensile strength (≥6MPa)

WENZHOU HEFENG SILICONE RUBBER CO.,LTD

330kV Nano-Coated Silicone Insulator for Extreme Weather

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