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66kV(72.5kV) Post Composite Insulator for High Voltage Substations
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- Product Overview
- Technical Specifications
- Product Structure
- Applications
- Testing Capability
- Packaging & Customization
Product Overview
Wishpower 66kV(72.5kV) post composite insulator is a high-voltage insulation support component used in transmission and substation systems. It is commonly installed on electrical equipment, busbar systems, disconnectors, surge arresters, instrument transformers and other power apparatus requiring reliable insulation and mechanical support.
Compared with traditional porcelain post insulators, composite post insulators are lighter, more impact-resistant and easier to install and maintain.
Key advantages include:
High-temperature vulcanized silicone rubber housing with excellent hydrophobic performance.
High-strength epoxy fiberglass core rod for stable mechanical support.
Hot-dip galvanized steel or customized metal end fittings for reliable connection.
Lightweight structure for easier transportation and installation.
Suitable for high altitude, heavy pollution, strong UV, humid and coastal environments.
Core Features
Excellent Electrical Insulation Performance
The 66kV(72.5kV) post composite insulator provides reliable power frequency withstand voltage, lightning impulse withstand voltage and surface insulation performance for high-voltage equipment.Superior Pollution Flashover Resistance
The silicone rubber housing offers strong hydrophobicity and hydrophobicity transfer, helping maintain insulation performance in dust, salt fog and humid conditions.High Mechanical Strength
The fiberglass core rod provides excellent bending strength and tensile strength, allowing the insulator to withstand mechanical loads, wind load and short-term impact.Lightweight Design
Compared with porcelain insulators, composite insulators are lighter and reduce structural load on equipment supports and mounting systems.Strong Aging and Weather Resistance
The silicone rubber outer layer resists UV radiation, ozone, temperature variation and electrical erosion, making it suitable for long-term outdoor operation.Lower Maintenance Cost
The product is not easy to break, reduces transportation damage and requires less frequent cleaning and maintenance.
Product Structure
The 66kV(72.5kV) post composite insulator generally consists of the following parts:
Silicone Rubber Housing
Provides external insulation, creepage distance, hydrophobic performance and environmental protection.Epoxy Fiberglass Core Rod
Works as the main load-bearing component and provides mechanical strength and structural stability.Metal End Fittings
Used for connection with electrical equipment, brackets or busbar systems. Materials may include hot-dip galvanized steel, stainless steel or customized metal fittings.Sealing Connection Area
Reliable crimping and sealing technology helps prevent moisture ingress into the core rod and fitting interface.Shed Profile
The shed design can be optimized according to pollution level, creepage distance and project requirements.
Technical Specifications
| Item | Technical Parameter |
|---|---|
| Product Name | 66kV(72.5kV) Post Composite Insulator |
| Product Type | Post Composite Insulator |
| Rated Voltage | 66kV |
| Maximum System Voltage | 72.5kV |
| Applicable System | AC High Voltage Transmission and Substation System |
| Housing Material | HTV Silicone Rubber |
| Core Material | Epoxy Fiberglass Core Rod |
| Fitting Material | Hot-dip Galvanized Steel / Stainless Steel / Customized Fittings |
| Typical Installation | Vertical Installation, Horizontal Installation, Equipment Support |
| Rated Bending Load | Customized according to project requirements |
| Creepage Distance | Designed according to pollution level and project requirements |
| Power Frequency Withstand Voltage | Suitable for 66kV/72.5kV system requirements |
| Lightning Impulse Withstand Voltage | Designed for high-voltage insulation coordination |
| Operating Environment | Indoor / Outdoor |
| Operating Temperature | -40℃ to +50℃, customizable |
| Color | Grey, Red or Customized |
| Applicable Standards | IEC, GB and Customer Technical Specifications |
| Application Fields | Substation, Switchgear, Busbar Support, Electrical Equipment Insulation Support |
Product Structure
Main Applications
The 66kV(72.5kV) post composite insulator is commonly used in the following applications:
High Voltage Substations
Used for equipment support, insulation separation and busbar connection in 66kV substations.Outdoor Switchgear Equipment
Suitable for disconnectors, circuit breakers, surge arresters, instrument transformers and other high-voltage apparatus.Busbar Support Systems
Provides mechanical support and insulation distance between conductors and grounded structures.Coastal and Heavy Pollution Areas
Suitable for salt fog, humidity, dust and industrial pollution environments.Wind and Solar Power Substations
Used as insulation support for high-voltage equipment in renewable energy step-up substations.Grid Upgrade Projects
Can replace some traditional porcelain post insulators to improve equipment reliability and reduce maintenance workload.
Testing Capability
Wishpower can provide factory inspection and type test support for 66kV(72.5kV) post composite insulators according to customer project requirements, ensuring reliable long-term operation in high-voltage power systems.
Main testing capabilities include:
Visual and Dimensional Inspection
Checks product appearance, shed profile, fitting dimensions, mounting holes and overall assembly quality.Mechanical Performance Test
Supports bending load test, tensile strength test, torsion test and end fitting connection reliability verification.Power Frequency Withstand Voltage Test
Verifies insulation strength under rated and specified test voltage conditions.Lightning Impulse Withstand Voltage Test
Evaluates insulation performance under lightning impulse conditions and improves system safety.Creepage Distance and Clearance Inspection
Confirms that the structure meets insulation distance requirements based on pollution level and project design.Hydrophobicity Test
Checks the hydrophobic performance of silicone rubber housing in polluted and humid environments.Sealing Performance Inspection
Verifies sealing reliability between metal fittings and fiberglass core rod to prevent moisture ingress.Aging and Weather Resistance Verification
UV, salt fog, thermal cycle and environmental adaptability tests can be provided 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 standards can your products meet?
A: Our products can be designed and tested according to IEC, ANSI, GB and customer-specific technical requirements.
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: 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.
Q: Can you provide customized insulation products?
A: Yes. WishPower supports customized voltage ratings, creepage distances, fittings, colors and drawings according to project requirements.
