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Help CenterPolymer Pin Insulator 11kV 10kN With Hydrophobic Silicone Rubber Housing
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As a dedicated manufacturer from Jinhua, Zhejiang, Jinhua Dika Electrical Equipment Co., Ltd. presents our advanced Polymer Pin Insulator 11kV 10kN, a critical component engineered for the reliability of modern overhead distribution networks. We have designed this insulator with a hydrophobic silicone rubber housing to deliver exceptional anti-pollution performance, effectively suppressing leakage currents and flashover risks in humid, coastal, or heavily contaminated environments. Our vertically integrated manufacturing process, certified to ISO9001 standards, ensures consistent quality from raw material inspection to final testing, providing you with a lightweight, shatter-resistant alternative to traditional porcelain that significantly reduces logistics costs and installation burdens.
This product is not merely an insulating support; it is a long-term asset for grid stability. The combination of a high-strength FRP core and a resilient silicone rubber weathershed guarantees a Specified Mechanical Load (SML) of 10kN, ensuring robust structural integrity under heavy conductor tension and dynamic wind loads. By choosing our polymer pin insulator, you are investing in a maintenance-free solution that retains its surface hydrophobicity over decades, minimizing cleaning cycles and maximizing uptime for your 11kV lines.
Key Features and Technical Advantages
- Superior Hydrophobicity & Pollution Performance: The high-temperature vulcanized (HTV) silicone rubber housing encapsulates the core with a unique non-wetting surface. Water forms discrete droplets instead of a continuous conductive film, drastically reducing leakage current even in dense fog, drizzle, or salt-laden atmospheres. This inherent hydrophobicity is transferable to surface pollution layers, a property not found in ceramic insulators.
- Lightweight & High Mechanical Strength: Weighing up to 80% less than equivalent porcelain pin insulators, our product features a unidirectional glass fiber reinforced epoxy resin core. This core provides a tensile strength exceeding 600 MPa, comfortably meeting the 10kN SML rating. The reduced weight simplifies handling, lowers freight costs, and minimizes the structural load on poles and cross-arms.
- Excellent Resistance to Tracking & Erosion: The silicone rubber formulation includes optimized ATH (Alumina Trihydrate) fillers, providing Class 1A 4.5 tracking and erosion resistance per IEC 60587. This ensures the insulator maintains its insulating integrity even under severe dry-band arcing conditions.
- Secure End Fittings: The galvanized steel pin and cap are attached to the FRP core using a controlled crimping process, ensuring a permanent, void-free mechanical connection. The hot-dip galvanization conforms to ASTM A153 or equivalent standards, offering robust corrosion protection for decades of service in diverse climates.
- UV & Weather Resistance: The silicone rubber compound is specially formulated to resist ultraviolet radiation, ozone, and extreme temperatures, preventing chalking, cracking, or brittleness over time. The operational range extends from -40°C to +50°C without performance degradation.
Technical Specifications
| Rated Voltage | 11 kV |
| Specified Mechanical Load (SML) | 10 kN |
| Housing Material | HTV Silicone Rubber (Hydrophobic) |
| Core Material | Epoxy Resin Impregnated Glass Fiber (FRP) |
| End Fittings | Hot-Dip Galvanized Forged Steel |
| Minimum Creepage Distance | Customizable (Standard options available) |
| Dry Arcing Distance | Available upon request |
| Power Frequency Withstand Voltage (Wet) | Available upon request |
| Lightning Impulse Withstand Voltage | Available upon request |
Customer Benefits and Applications
By integrating this 11kV polymer pin insulator into your grid, you directly address the challenges of line maintenance and reliability. The hydrophobic surface eliminates the need for regular silicone grease coating or manual washing, leading to a lower total cost of ownership. Its shatterproof nature enhances safety for line crews and the public, as there is no risk of explosive fragmentation from vandalism or thermal shock. This product is ideally suited for:
- Medium voltage distribution lines in coastal and industrial pollution zones.
- Compact overhead line designs where weight and size reduction are critical.
- Replacement of aging ceramic insulators to upgrade line performance without tower reinforcement.
- Mountainous or heavily forested areas where accessibility for maintenance is difficult.
Our commitment to quality is reflected in every unit we ship. Jinhua Dika Electrical Equipment Co., Ltd. operates a rigorous quality control system, conducting 100% routine mechanical and electrical testing on every batch before dispatch. With an annual export value ranging from US$1 Million to US$1.5 Million, we have successfully served clients across North America, South America, Europe, Southeast Asia, Africa, and Oceania. We understand diverse grid standards and logistical requirements, offering flexible shipping solutions from major ports like Shanghai, Ningbo, Tianjin, and Guangzhou. Partner with us to secure a reliable supply of high-performance insulators that keep your lines energized and your maintenance budget in check.
Frequently Asked Questions (FAQ)
Q1: How does the hydrophobic property of the silicone rubber housing improve performance compared to porcelain?
A: Unlike porcelain, which has a hydrophilic surface that allows water to form a continuous conductive film, our silicone rubber housing is hydrophobic. Water beads up and rolls off, preventing the formation of leakage currents. Even when the surface becomes polluted, the silicone oil migrates into the contaminant layer, maintaining a high surface resistance and drastically reducing the risk of pollution flashover.
Q2: What does the 10kN SML rating signify for my distribution line project?
A: The 10kN Specified Mechanical Load (SML) is the maximum tensile load the insulator can withstand under normal operating conditions without mechanical failure. This rating ensures the insulator can securely support the weight and tension of conductors, especially in long spans or areas subject to high wind and ice loads, providing a significant safety margin for your 11kV lines.
Q3: Are these insulators resistant to damage from vandalism or accidental impact?
A: Yes, a key advantage of our polymer pin insulator is its shatterproof nature. The silicone rubber housing and flexible FRP core will absorb impact energy without catastrophic fragmentation, unlike porcelain or glass. This greatly reduces line outages caused by gunshot vandalism or thrown objects, and enhances safety for personnel working nearby.
Q4: Can the creepage distance be customized for heavily polluted environments?
A: Absolutely. We understand that different regions have varying pollution severity levels. We can customize the shed profile and increase the creepage distance to meet specific requirements, such as 25mm/kV or even higher for very heavy pollution (Class IV) environments. Please provide your target creepage distance, and our engineering team will design a suitable solution.
Q5: What standards do these 11kV pin insulators comply with?
A: Our standard production is based on the IEC 61109 framework for composite insulators. We can also manufacture to meet other equivalent national or international standards upon request. Our ISO9001-certified quality system ensures that all design and testing parameters are strictly controlled and documented.
Q6: What is the typical delivery time for a bulk order?
A: Delivery times depend on the order quantity and the level of customization required. For standard designs, our manufacturing cycle is typically 15-25 days after order confirmation. We ship from major ports like Shanghai and Ningbo, and our export team will coordinate closely with you to ensure timely delivery to your destination.
Q7: How do you ensure the quality of the metal end fittings and prevent corrosion?
A: We use forged steel for the end fittings, which are then subjected to a hot-dip galvanization process. This creates a thick, metallurgically bonded zinc coating that provides sacrificial protection against rust and corrosion. We perform visual and coating thickness tests to ensure the galvanization meets the required standards for long-term durability in outdoor environments.
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