Product Video
1 / 1
27.5kV Bow-Type Cantilever Support Composite Insulator
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 27.5kV bow-type cantilever support composite insulator is an important insulation component used in railway traction power supply and overhead contact systems. It is commonly installed in cantilever support structures, positioning devices and railway OCS assemblies where both electrical insulation and mechanical strength are required.
Wishpower composite insulators offer the following advantages:
High-temperature vulcanized silicone rubber housing with excellent hydrophobicity.
High-strength fiberglass core rod for stable mechanical support.
Lightweight design for easier transportation, installation and maintenance.
Optimized shed profile to improve creepage distance and reduce pollution flashover risk.
Suitable for 27.5kV electrified railway traction power supply and overhead contact line systems.
Core Features
Reliable Electrical Insulation
The product is designed for 27.5kV railway systems and helps isolate energized components from support structures.Excellent Pollution Flashover Resistance
The silicone rubber housing provides strong hydrophobic performance, making the insulator suitable for dusty, humid, coastal or polluted environments.Stable Mechanical Support
The fiberglass core rod provides bending strength, tensile strength and fatigue resistance for cantilever support applications.Lightweight Composite Design
Compared with traditional porcelain insulators, composite insulators are lighter and easier to install in railway construction projects.Weather and Aging Resistance
The outer silicone rubber layer offers resistance to UV radiation, ozone, temperature variation and outdoor aging.Low Maintenance Requirement
The hydrophobic surface helps reduce contamination accumulation and supports lower maintenance costs during long-term operation.
Product Structure
The 27.5kV bow-type cantilever support composite insulator is generally composed of the following parts:
Fiberglass Core Rod
The core rod works as the main mechanical load-bearing component and provides bending and tensile strength.Silicone Rubber Housing
The outer insulation layer protects the core and improves weather resistance, pollution resistance and dielectric performance.Composite Shed Profile
The shed design increases creepage distance and improves performance under rain, fog and polluted conditions.Metal End Fittings
Hot-dip galvanized steel fittings or customized metal fittings are used for connection with railway cantilever structures.End Sealing Area
The sealing design helps prevent moisture ingress and improves long-term reliability.
Technical Specifications
| Item | Technical Parameter |
|---|---|
| Product Name | 27.5kV Bow-Type Cantilever Support Composite Insulator |
| Application System | Electrified Railway Overhead Contact System |
| Rated Voltage | 27.5kV |
| Product Type | Bow-Type Cantilever Support Composite Insulator |
| Housing Material | High-Temperature Vulcanized Silicone Rubber |
| Core Material | Epoxy Fiberglass Core Rod |
| End Fittings | Hot-Dip Galvanized Steel / Customized Fittings |
| Structure Type | Bow-Type Cantilever Support Structure |
| Creepage Distance | Customized according to project requirements |
| Mechanical Performance | Bending, tensile and vibration-resistant design |
| Operating Environment | Outdoor, railway line, polluted area, humid area, temperature-changing area |
| Installation Method | Connected with railway cantilever, support bracket or positioning structure |
| Color | Grey, red or customized |
| Applicable Standards | IEC, TB and customer technical specifications |
| Brand | Wishpower |
Product Structure
Main Applications
The 27.5kV bow-type cantilever support composite insulator is commonly used in:
Electrified railway overhead contact systems
High-speed railway traction power supply lines
Conventional railway OCS upgrade projects
Intercity railway and passenger dedicated lines
Railway cantilever support structures
OCS positioning and support assemblies
Coastal, humid, dusty or polluted railway sections
Replacement of traditional railway insulation components
Testing Capability
Wishpower can perform quality inspection and testing according to railway project requirements:
Visual and Dimensional Inspection
To verify product appearance, shed profile, fitting dimensions and assembly consistency.Power Frequency Withstand Voltage Test
To confirm the insulation performance under specified voltage conditions.Lightning Impulse Withstand Test
To evaluate insulation capability under transient overvoltage conditions.Mechanical Load Test
To check bending, tensile or specified mechanical load performance.Hydrophobicity Test
To evaluate the surface hydrophobic condition of the silicone rubber housing.Sealing Performance Inspection
To check the connection area between metal fittings and composite housing.Aging and Weather Resistance Verification
UV aging, thermal aging, damp heat or salt fog tests can be conducted according to project requirements.
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: 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: 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: 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: What standards can your products meet?
A: Our products can be designed and tested according to IEC, ANSI, GB and customer-specific technical requirements.
