Pin insulators provide mechanical support and electrical insulation in overhead distribution systems, securing conductors to utility poles while preventing current flow to ground. Mounted on poles or crossarms, they hold distribution lines in grooves using metal wire, maintaining system integrity and safe electricity distribution.
These components deliver high resistance to contamination and moisture, with excellent wet AC withstand voltage characteristics and power arc resistivity. The design distributes electrical stress evenly across the surface, enhancing reliability and durability. Materials include porcelain, glass, and polymer composites such as silicone rubber, which offers hydrophobic properties and resistance to UV radiation and corrosion. Mechanical strength ratings are tailored to specific applications, validated through extensive field experience.
Pin insulators are manufactured according to international standards including IEC 60383, ANSI C29.5 (low voltage), ANSI C29.6 (high voltage), and ANSI C29.7. Available variants address voltage classes from 11kV to 36kV and beyond, with options ranging from one-piece porcelain to multipiece polymer constructions. Special designs like fog bowl or high leakage types serve areas with extreme contamination.
Mounting accessories include studs and yoke-style clamps with reversible keepers, designed to fit standard neck dimensions and accommodate various conductor diameters for straightforward installation and maintenance.
Leading Pin Insulator Manufacturer in China
RaxPower is China’s leading manufacturer of pole line hardware, specializing in the research, development, and production of high-quality insulators. Established in 2003 with over 21 years of manufacturing and exporting experience, we are a quality-focused organization committed to providing high-grade engineering products.
Our Pin Insulator is a superior product designed with cutting-edge characteristics and premium materials, ensuring electro-mechanical integrity and outstanding performance. It adheres to international standards like IEC and ANSI, and features high mechanical strength, anti-bend and anti-corrosive properties, and hydrophobic surfaces for reliable operation in diverse conditions.
Utilizing advanced manufacturing processes such as hot forging and automated techniques, each insulator undergoes strict quality control, including load testing and galvanization, to guarantee durability and safety in power distribution and transmission applications. Contact us for product details and quotations.
| Voltage Class (kV) | ANSI Class | Standard | Material | Height (mm) | Diameter (mm) | Leakage Distance (mm) | Dry Arcing Distance (mm) | Minimum Pin Height (mm) | Cantilever Strength (kN) | Power Frequency Dry Flashover (kV) | Power Frequency Wet Flashover (kV) | Impulse Flashover Positive (kV) | Impulse Flashover Negative (kV) | Puncture Voltage (kV) | RIV Test Voltage (kV) | Max RIV (μV) | Net Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 | 55-2 | ANSI C29.5 | Polymer | N/A | N/A | 320 | 165 | N/A | 10.0 | 60 | 40 | 100 | 120 | 100 | N/A | N/A | N/A |
| 22 | 56-1 | ANSI C29.6 | Porcelain | 146.1 | 190.5 | 330.2 | 177.8 | 152.4 | 11.1 | 95 | 60 | 150 | 190 | 130 | 15 | 100 | 3.2 |
| 33 | 56-3 | ANSI C29.6 | Porcelain | 190.5 | 266.7 | 533.4 | 241.3 | 203.2 | 13.3 | 125 | 80 | 200 | 265 | 165 | 30 | 200 | 6.8 |
Frequently Asked Questions (FAQS)
What is the primary function of a pin insulator?
Pin insulators support distribution lines on utility poles, isolating the lines from the pole to prevent current flow to the ground and ensure safe, stable electricity distribution in overhead power systems.
What features make pin insulators suitable for harsh environments?
RaxPower pin insulators feature excellent anti-contamination performance, high wet AC withstand voltage, high power arc resistivity, mechanical strength, and resistance to UV, ozone, and earthquakes. Their hydrophobic surfaces repel water, ensuring reliable operation in polluted or moist conditions.
What materials are used in the construction of pin insulators?
Pin insulators are constructed from porcelain, silicone rubber, and composite polymers. Porcelain provides durability, while polymer options offer lightweight, unbreakable, and hydrophobic properties for enhanced performance in harsh conditions.
What voltage ratings and mechanical specifications are available?
RaxPower offers pin insulators for voltage classes from 11kV to 36kV, with mechanical failing loads ranging from 10kN to 70kN and creepage distances from 320mm to 900mm, designed to meet the requirements of different distribution and transmission lines.
Which international standards do your pin insulators meet?
RaxPower pin insulators comply with ANSI C29.5, ANSI C29.6, ANSI C29.7, IEC 60383, BS3288, and IEC 61952, ensuring high quality, reliability, and safe operation in diverse utility grid applications.
How are pin insulators mounted and installed?
Pin insulators are mounted on utility poles using a spindle, and the conductor is secured to a groove on the top or side with metal wire or preformed ties. They can be installed in both vertical and horizontal orientations.
Are custom specifications available for specialized applications?
Yes, we provide customized pin insulators for high contamination areas, railway electrification, and other specialized needs, offering features like anti-bending and anti-corrosive properties while maintaining compliance with international standards.
How do you ensure cost-effectiveness without compromising quality?
We implement strict quality control from raw material selection to final testing. Our lightweight, unbreakable, and hydrophobic designs reduce long-term maintenance costs while ensuring consistent performance and durability.
What is your capacity for large project orders?
With over 20 years of experience and large production facilities, we efficiently handle bulk orders and ensure timely delivery worldwide, supported by our robust supply chain and extensive warehousing.
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