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25kV Railway Positioning Composite Insulator for Overhead Contact Systems
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 25kV railway positioning composite insulator is designed for electrified railway overhead contact systems, providing reliable conductor positioning, mechanical support and electrical insulation. Wishpower composite insulators use silicone rubber housing and high-strength fiberglass core technology, making them suitable for high-speed railways, heavy-haul lines, intercity railways and traction power networks.
The Wishpower 25kV railway positioning composite insulator is an insulation component developed for 25kV AC electrified railway systems. It is typically installed in positioning devices, cantilever assemblies or overhead contact line support structures to maintain the correct position of contact wires while isolating high voltage from the supporting structure.
Key advantages of Wishpower composite insulators include:
High-temperature vulcanized silicone rubber housing with excellent hydrophobicity and anti-pollution performance.
Epoxy fiberglass core rod with high tensile, bending and mechanical strength.
Lightweight design for easier installation, replacement and maintenance.
Reliable end fittings suitable for railway overhead contact system structures.
Strong resistance to UV radiation, aging, tracking and weather exposure.
Customizable dimensions, fittings and creepage distance according to project requirements.
Core Features
High Electrical Insulation
The 25kV railway positioning composite insulator is designed to meet the insulation requirements of electrified railway overhead contact systems, including power frequency withstand voltage, impulse withstand performance and creepage distance.Excellent Anti-Pollution Performance
Silicone rubber material provides stable hydrophobicity, helping reduce flashover risks in humid, dusty, coastal or industrial polluted environments.Lightweight Construction
Compared with porcelain insulators, composite insulators are lighter, reducing the load on railway support structures and improving installation efficiency.Reliable Mechanical Strength
The fiberglass core and metal end fittings provide strong resistance to vibration, wind load and mechanical stress during railway operation.Strong Weather Resistance
The product is suitable for long-term outdoor service in cold, hot, humid, coastal and high-UV environments.Easy Installation and Maintenance
Compact structure and flexible connection options help reduce installation difficulty and railway maintenance costs.
Product Structure
The 25kV railway positioning composite insulator generally consists of the following parts:
Silicone Rubber Housing
Provides external insulation and protects the core from pollution, UV radiation, moisture and aging.Fiberglass Reinforced Epoxy Core
Acts as the main mechanical load-bearing component, offering high tensile, bending and impact resistance.Metal End Fittings
Usually made of hot-dip galvanized steel, stainless steel or customized corrosion-resistant metal materials for connection with railway positioning devices.Sealing System
Reliable sealing at the interface between the core and fittings prevents moisture ingress and improves long-term operating reliability.Shed Profile
Optimized shed spacing and creepage distance improve insulation performance under outdoor and polluted operating conditions.
Technical Specifications
| Item | Specification |
|---|---|
| Product Name | 25kV Railway Positioning Composite Insulator |
| Brand | Wishpower |
| Applicable System | 25kV AC Electrified Railway Overhead Contact System |
| Rated Voltage | 25kV |
| Frequency | 50Hz / 60Hz |
| Housing Material | HTV Silicone Rubber |
| Core Material | Epoxy Fiberglass Core Rod |
| Fitting Material | Hot-Dip Galvanized Steel / Stainless Steel / Customizable |
| Typical Application | OCS positioning device, cantilever system, railway traction power line |
| Main Performance | High insulation, anti-pollution, weather resistance, vibration resistance, lightweight |
| Creepage Distance | Customizable according to project requirements |
| Mechanical Load | Customizable according to railway project design |
| Installation Type | Customized connection interface according to OCS structure |
| Operating Environment | Outdoor, polluted, humid, coastal, cold or hot areas |
| Reference Standards | IEC 61109, IEC 62217, EN 50151 and relevant railway standards |
| Service Life | Designed for long-term outdoor operation |
Product Structure
Main Applications
The 25kV railway positioning composite insulator is widely used in:
High-speed railway overhead contact systems
Conventional electrified railway lines
Heavy-haul railway traction power systems
Intercity and regional railways
Passenger dedicated railway lines
Railway cantilever and positioning assemblies
Coastal, polluted and windy railway areas
Cold, humid and high-UV railway environments
Railway line upgrading and OCS modernization projects
Testing Capability
Wishpower conducts strict electrical, mechanical and environmental tests to ensure the stable performance of 25kV railway positioning composite insulators.
Visual and Dimensional Inspection
Checks shed profile, end fittings, sealing areas, dimensions and assembly quality according to drawings and project requirements.Power Frequency Withstand Voltage Test
Verifies the insulation performance under normal operating voltage and overvoltage conditions.Lightning Impulse Withstand Test
Evaluates insulation stability under impulse voltage conditions.Mechanical Tensile or Bending Test
Confirms the safety margin of the core, fittings and complete insulator under mechanical load.Hydrophobicity Test
Assesses the water-repellent performance of silicone rubber housing in humid and polluted environments.Sealing Performance Inspection
Checks the reliability of the sealing structure around end fittings and core interfaces.Aging and Weathering Test
Uses UV exposure, thermal cycling, salt fog or humidity tests to evaluate long-term outdoor service capability.Partial Discharge and Electrical Performance Test
Conducted according to project requirements to improve operational safety and quality control.
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: 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.
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 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: 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.
