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27kV Pin Type Composite Insulator for Overhead Lines
Factory: We are a professional manufacturer providing OEM custom production services.
- Product Overview
- Technical Specifications
- Product Structure
- Applications
- Testing Capability
- Packaging & Customization
Product Overview
The 27kV pin type composite insulator is designed to provide electrical insulation and mechanical support for conductors on medium-voltage overhead distribution lines. Wishpower combines a high-strength FRP core, silicone rubber housing and corrosion-resistant metal fittings to deliver reliable performance in polluted, humid, coastal and temperature-changing environments.
Product Overview
The Wishpower 27kV pin type composite insulator is an outdoor insulating component developed for 27kV overhead power distribution systems. It is generally installed on a pole crossarm or supporting bracket to secure the conductor and electrically isolate it from grounded structures.
Compared with conventional porcelain pin insulators, the product offers several practical advantages:
High-temperature vulcanized silicone rubber housing with excellent hydrophobicity;
High-strength fiberglass-reinforced epoxy core for mechanical support;
Lightweight construction for easier transportation and installation;
Corrosion-resistant metal fittings for long-term outdoor operation;
Customizable creepage distance, connection dimensions and shed profiles;
Reliable performance in polluted, humid and coastal environments.
Core Features
Reliable Electrical Insulation
The optimized insulation distance and shed profile provide dependable power-frequency and lightning impulse withstand performance.Excellent Pollution Flashover Resistance
The hydrophobic silicone rubber surface helps prevent continuous water film formation under wet and contaminated conditions.High Mechanical Strength
The FRP core withstands conductor weight, wind load, vibration and other mechanical stresses encountered during line operation.Lightweight Design
The composite structure is lighter than conventional porcelain alternatives, simplifying handling and installation.Weather and Aging Resistance
The housing material provides resistance to ultraviolet radiation, ozone, temperature variation, tracking and erosion.Low Maintenance Requirements
The compact structure and contamination-resistant surface help reduce routine inspection and cleaning requirements.
Product Structure
A typical 27kV pin type composite insulator consists of the following components:
FRP Core Rod
The fiberglass-reinforced epoxy resin core provides the primary mechanical strength and internal insulation support.Silicone Rubber Housing
The external housing protects the core and provides the required creepage distance through its molded shed profile.Conductor-Side Fitting
The upper fitting supports or secures the conductor and can be designed for different conductor and clamp configurations.Mounting-Side Fitting
The lower fitting connects the insulator to the crossarm, bracket or pole structure.End Sealing System
The sealed interface between the core, housing and metal fitting limits moisture and contaminant ingress.Optional Arc Protection Accessories
Arc protection devices or other fittings can be supplied according to the insulation coordination requirements of the line.
Technical Specifications
| Technical Item | Typical Specification |
|---|---|
| Product Name | 27kV Pin Type Composite Insulator |
| Rated Voltage | 27kV |
| Highest System Voltage | Approx. 30–36kV, project dependent |
| Housing Material | High-temperature vulcanized silicone rubber |
| Core Material | Fiberglass-reinforced epoxy resin |
| Metal Fittings | Hot-dip galvanized steel or corrosion-resistant metal |
| Structural Height | Approx. 350–500mm, customizable |
| Minimum Creepage Distance | Approx. 700–1000mm, customizable |
| Dry Arcing Distance | Approx. 250–380mm |
| Specified Cantilever Load | 8kN, 10kN, 12.5kN or customized |
| Power-Frequency Wet Withstand Voltage | Approx. 70–95kV |
| Lightning Impulse Withstand Voltage | Approx. 170–200kV |
| Shed Color | Gray, red or customized |
| Operating Temperature | Typically -40°C to +50°C |
| Mounting Type | Threaded, flange-mounted or customized |
| Applicable Standards | IEC 61952, IEC 62217 or project standards |
Product Structure
Main Applications
The 27kV pin type composite insulator is commonly used in:
27kV overhead distribution lines;
Urban medium-voltage power grids;
Rural distribution networks;
Industrial park power systems;
Wind farm collector lines;
Solar power plant transmission lines;
Coastal and salt-fog environments;
High-pollution industrial areas;
Mountainous and high-wind regions;
Replacement of porcelain pin insulators;
New line construction and grid modernization projects.
Testing Capability
Wishpower can perform the following inspections and tests for 27kV pin type composite insulators according to applicable standards and project requirements:
Visual and Dimensional Inspection
Verification of housing quality, metal fittings, dimensions, mounting interfaces and product markings.Cantilever Load Test
Evaluation of the mechanical strength of the insulator under the specified bending load.Power-Frequency Withstand Test
Verification of insulation performance under dry or wet power-frequency voltage conditions.Lightning Impulse Withstand Test
Assessment of the insulator’s ability to withstand lightning impulse overvoltage.Creepage and Arcing Distance Measurement
Confirmation of creepage distance, dry arcing distance and structural insulation dimensions.Interface Sealing Inspection
Examination of the sealing condition between the FRP core, silicone housing and metal fittings.Galvanizing and Corrosion Protection Test
Inspection of coating quality and zinc layer thickness on metal components.Silicone Rubber Material Test
Testing may include hardness, tensile strength, tear strength, hydrophobicity and aging resistance.Routine Factory Inspection
Required inspections are carried out for each production batch to maintain consistent product quality and technical performance.
Packaging & Transportation
To keep products safe during transportation and storage, we use the following packaging methods:
- Individual Packaging: Each product is wrapped with protective film, packed in a high-strength carton, and cushioned with buffer materials.
- Pallet Packaging: Multiple products are fixed on wooden pallets and wrapped with stretch film, suitable for container shipping.
- Export Packaging: Fumigated wooden cases, moisture-proof treatment, and detailed packing lists are provided according to sea freight requirements.
Customization Service
WishPower can provide the following customization options according to customer requirements:
- Structural Dimensions: Adjust overall height, creepage distance, shed quantity, and shed diameter.
- End Fittings: Customize ball-socket, tongue-clevis, eye, or other interface types according to connection requirements.
- Color: Standard gray, with red, yellow, blue, and other colors available subject to MOQ.
- Special Environments: Formulations for extreme cold (-60 C), strong UV exposure, heavy pollution, and other harsh conditions.
- Voltage Classes: Full-range customization from 10kV to 1000kV.
- Marking: Customer logos or model numbers can be molded or printed on the product.
For specific customization requirements, please contact our sales engineers. We will provide a technical solution within 24 hours.
FAQ
Q: What information should I provide for a quotation?
A: Please provide voltage level, product type, quantity, application environment, standard, drawings or technical specifications if available.
Q: Can you supply complete products for transmission and distribution projects?
A: Yes. We can provide composite insulators, surge arresters, fuse cutouts, insulating bushings and related power insulation products.
Q: Can you provide customized insulation products?
A: Yes. WishPower supports customized voltage ratings, creepage distances, fittings, colors and drawings according to project requirements.
Q: Are composite insulators suitable for coastal areas?
A: Yes. Composite insulators with silicone rubber housing provide good hydrophobicity and anti-pollution performance, making them suitable for coastal and polluted environments.
Q: How do I choose the right composite insulator for my project?
A: You can provide voltage level, installation type, mechanical load, creepage distance and operating environment. Our team will recommend the suitable model.
