The 33kV pin-type polymer insulator is centered around a high-strength epoxy glass fiber core rod, and is coated with a silicone rubber shed that exhibits excellent weather resistance.
Performance and advantages: It is extremely lightweight (only 1/3 to 1/4 of the same-level porcelain insulators), impact-resistant and not fragile, and convenient and safe for transportation and installation.
The silicone rubber umbrella skirt has excellent water repellency and migration properties, and strong resistance to pollution flashover, making it particularly suitable for high-pollution environments such as coastal areas and industrial zones. It requires no cleaning and maintenance, significantly reducing life cycle costs.
Advantages over porcelain insulators: Over 70% lighter in weight, several times superior in resistance to pollution flashover, impact resistance without brittle fracture (improved safety), maintenance-free, low installation and transportation costs, and superior comprehensive performance and economy.
Core features: high reliability, maintenance-free, lightweight, and strong resistance to contamination.
For an accurate 33kV polymer pin insulator price, please share your drawing or technical specifications.
Product Detail
The 33kV composite pin insulator is designed for medium-voltage overhead distribution networks, providing reliable electrical insulation and mechanical support for conductors mounted on crossarms. This type of insulator is widely used in 33kV overhead transmission and distribution lines, substations, and rural electrification projects.
Compared with traditional porcelain insulators, composite pin insulators feature a fiberglass reinforced epoxy core rod, silicone rubber housing, and galvanized metal fittings, forming a lightweight yet highly durable structure suitable for long-term outdoor service.
Thanks to advanced polymer materials and optimized shed design, the 33kV polymer pin insulator offers excellent resistance to pollution flashover, UV radiation, moisture, and temperature fluctuations, ensuring reliable power system operation even in harsh environments.
A typical composite pin insulator consists of three main components:
The core rod is made of ECR glass fiber reinforced epoxy resin, which provides outstanding mechanical strength and load-bearing capability. This internal structure ensures that the insulator can withstand bending loads caused by conductor tension, wind pressure, and ice loading.
The outer housing is molded from high-temperature vulcanized (HTV) silicone rubber, providing excellent hydrophobicity and anti-pollution performance. Even when exposed to contamination such as dust, salt fog, or industrial pollutants, the silicone rubber maintains its water-repellent properties, reducing leakage current and flashover risks.
The insulator is equipped with hot-dip galvanized forged steel fittings, ensuring strong mechanical connection and excellent corrosion resistance for long-term outdoor operation.
Composite insulators are typically 70–80% lighter than porcelain insulators, which greatly reduces transportation costs and installation difficulty.
The lightweight structure also lowers the mechanical load on poles and crossarms.
The hydrophobic surface of silicone rubber prevents water films from forming on the insulator surface. As a result, the insulator maintains high electrical resistance even in polluted or humid environments.
This makes polymer pin insulators ideal for:
Coastal regions
Industrial zones
Areas with heavy dust or pollution
The fiberglass core rod offers superior tensile and bending strength. Some models can withstand mechanical loads up to 10–12 kN, ensuring reliable conductor support in high-wind or heavy-ice conditions.
Polymer insulators are designed to operate under extreme weather conditions. The silicone rubber housing is highly resistant to:
UV radiation
Temperature variation (-40°C to +60°C)
Ozone and chemical exposure
This ensures a service life exceeding 15 years under normal operating conditions.
Unlike porcelain insulators that may require regular cleaning in polluted areas, polymer insulators benefit from self-cleaning hydrophobic surfaces, significantly reducing maintenance costs over the life cycle of the power line.
Product Parameters
To ensure reliable performance and long service life, high-quality composite insulators undergo strict manufacturing and testing procedures, including:
Raw material inspection
Core rod mechanical testing
Silicone rubber injection molding
Electrical withstand voltage testing
Mechanical load testing
Products are typically manufactured according to international standards such as:
IEC 61109
IEC 62217
ANSI C29 standards
These standards ensure safe and reliable operation in modern power grids.
| Model | Rated Voltage (kV) | Rated Mechanical Bending Load (kN) | Structure Height (mm) | Minimum Arc Distance (mm) | Minimum Creepage Distance (mm) | Power Frequency 1 min Wet Withstand Voltage (kV) |
| FPQ-33/5 | 33 | 5 | 540 | 290 | 910 | 95 |
As a professional overhead line hardware manufacturer, we provide customized solutions for global power utilities and EPC contractors.
Available customization options include:
Creepage distance design
Mechanical load capacity
Shed profile optimization
Insulator color and marking
Special packaging or OEM branding
Our engineering team can also manufacture according to technical drawings or project specifications. If you are looking for a reliable 33kV composite pin insulator supplier, please contact us!
FAQ
Q
A
Can we print our trademark or company name on your product or package?
OEM and ODM orders are warmly welcomed, we have rich successful experience in OEM projects. In addition, our R&D team will provide you with professional suggestions.
Q
A
How does your company do in terms of quality control?
1) We choose all raw materials to be of high quality.
2) Professional and skilled workers pay attention to every detail in handling the production process.
3) The quality control department is specialized in quality inspection for each process.
Q
A
How can I get samples to test your quality?
We can provide free samples for you to test and check, just bear the freight cost.
Contact us to know more about our products, our professional team will serve you and customize it according to your requirements.
Related Products
