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20kV(22kV,24kV) Post Composite Insulator for Power Distribution and Substations
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 20kV post composite insulator is widely used in medium-voltage power distribution systems for conductor support, electrical insulation and equipment mounting. Wishpower 20kV post composite insulator is designed with a silicone rubber housing and high-strength fiberglass core, making it suitable for outdoor distribution lines, substations and switchgear applications.
Main advantages include:
High-temperature vulcanized silicone rubber housing with excellent hydrophobicity.
Epoxy fiberglass core with strong bending and tensile strength.
Hot-dip galvanized or corrosion-resistant metal fittings for outdoor service.
Lightweight structure for easier transportation and installation.
Suitable for 20kV distribution lines, substations, switchgear and electrical equipment support.
Core Features
Reliable Electrical Insulation
The 20kV post composite insulator provides stable insulation performance in medium-voltage systems and helps reduce flashover and breakdown risks.Excellent Pollution Flashover Resistance
The silicone rubber surface maintains hydrophobicity, supporting reliable performance in dusty, humid and salt-fog environments.High Mechanical Strength
The fiberglass core offers strong bending and tensile performance for conductor support, busbar support and equipment mounting.Lightweight Design
Compared with porcelain insulators, composite insulators are easier to handle, transport and install.Weather and Aging Resistance
The product is suitable for long-term outdoor exposure, including UV radiation, rain, snow and temperature variation.Low Maintenance Cost
The anti-pollution surface helps reduce cleaning frequency and overall maintenance requirements.
Product Structure
The 20kV post composite insulator normally consists of the following components:
Silicone Rubber Sheds and Housing
Provides external insulation protection, increases creepage distance and improves pollution resistance.Epoxy Fiberglass Core
Serves as the main load-bearing component and ensures mechanical strength.Metal End Fittings
Used for connection with brackets, equipment bases, busbars or conductors. Common materials include hot-dip galvanized steel or customized corrosion-resistant fittings.Sealing Structure
Prevents moisture from entering the interface between the core and fittings.Integrated Manufacturing Process
Stable bonding and forming processes ensure reliable connection among the housing, core and fittings.
Technical Specifications
| Item | Technical Parameter |
|---|---|
| Product Name | 20kV Post Composite Insulator |
| Product Type | Composite Post Insulator |
| Applicable System Voltage | 20kV |
| Rated Voltage | 20kV |
| Rated Frequency | 50Hz / 60Hz |
| Main Materials | Silicone rubber housing, epoxy fiberglass core, metal fittings |
| Shed Material | HTV Silicone Rubber |
| Core Material | Epoxy Resin Fiberglass Rod |
| Fitting Material | Hot-dip Galvanized Steel / Customized |
| Rated Mechanical Bending Load | Customized according to project requirements |
| Creepage Distance | Designed according to pollution level and customer requirements |
| Installation Method | Vertical installation, horizontal installation, equipment support installation |
| Service Environment | Indoor / Outdoor |
| Typical Applications | Distribution line, substation, switchgear, busbar support |
| Color | Grey, red or customized |
| Standard | IEC, GB or customer technical specification |
| Customization | Size, fittings, creepage distance and mechanical rating available |
Product Structure
Main Applications
The 20kV post composite insulator is commonly used in the following power system applications:
20kV Distribution Lines
Used for conductor support and insulation in overhead distribution networks.Substation Equipment Support
Suitable for busbars, connection conductors and electrical equipment terminals.Switchgear and Ring Main Units
Used as insulation support inside or outside medium-voltage switchgear.Urban Distribution Networks
Suitable for power grid upgrading, expansion and equipment modernization.Rural Distribution Networks
Applicable to long-distance distribution lines and outdoor environments.Wind and Solar Power Systems
Suitable for renewable energy substations, transformer stations and distribution lines.Coastal and Heavy Pollution Areas
Silicone rubber housing improves reliability under salt-fog, humidity and polluted conditions.
Testing Capability
Wishpower can conduct multiple inspections and tests for 20kV post composite insulators according to project requirements, ensuring electrical performance, mechanical strength and long-term service reliability.
Appearance and Dimension Inspection
Checks housing surface, shed integrity, fitting dimensions, mounting holes and overall structure.Power Frequency Withstand Voltage Test
Verifies insulation withstand capability under specified voltage conditions.Lightning Impulse Withstand Test
Evaluates insulation performance under impulse voltage stress.Mechanical Bending Load Test
Tests structural strength and stability under specified mechanical load.Sealing Performance Inspection
Confirms reliable sealing between fittings and the fiberglass core.Hydrophobicity Test
Evaluates the water-repellent performance of the silicone rubber surface.Creepage Distance and Arcing Distance Inspection
Ensures the structure meets voltage level and pollution class requirements.Aging and Weather Resistance Evaluation
UV, humidity, salt-fog and environmental aging tests can be arranged according to customer 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: 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 standards can your products meet?
A: Our products can be designed and tested according to IEC, ANSI, GB and customer-specific technical requirements.
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: 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.
