In the future, with an international perspective, we will overcome obstacles in the industry competition, and become stronger when we encounter the strong. With the goal of promoting the development of the post insulator and pin insulator, Vertical Line Post insulator, 110kV Composite Suspension Insulator industry, we will continue to provide customers with a safe, secure and convenient product experience, in order to become Trustworthy post insulator and pin insulator, Vertical Line Post insulator, 110kV Composite Suspension Insulator maker and keep working hard! In the process of production and operation, our company has established and improved the environmental management system and strictly controlled the energy consumption and emission of the enterprise. Our products and services are designed to help businesses reduce costs and improve efficiency. Our production system is well managed, and we adhere to the corporate purpose of "resource innovation, safety and environment". Our company values are based on our commitment to customer satisfaction, employee satisfaction, and environmental responsibility.
Composite polymer insulators are made of high-quality silicone rubber housing and sheds, providing excellent resistance to tracking, erosion, and harsh environmental conditions. The core rod is manufactured from epoxy fiberglass, delivering superior mechanical performance - with up to 1.5 times the expansion strength of ordinary steel and 3–4 times the tensile strength of porcelain. This ensures outstanding axial tension capability, vibration absorption, and superior seismic performance.
These composite suspension and tension insulators are widely used on overhead transmission lines to provide reliable mechanical support and electrical insulation. Compared with traditional porcelain and glass insulators, composite insulators offer better hydrophobicity and pollution resistance, effectively preventing flashover in contaminated or coastal areas.
The right image shows our composite insulators used on a 400 kV transmission line in Europe, proving their reliable performance in real projects.
Technical Drawings & Dimensions
Our composite long-rod insulators are engineered to meet the specific requirements of each project and comply with international standards. Below, you can find detailed drawings and technical specifications for the FXBW-500kV160 polymer insulator.
| Category | Parameter | Value |
|---|---|---|
| Dimensions | Height | 3350 ± 50 mm |
| Min. Dry Arcing Distance | 3050 mm | |
| Min. Creepage Distance | 10500 mm | |
| Diameter of the Rod | Ø24 mm | |
| Coupling Dimensions | Socket/Ball 20R/20 (IEC 60120) | |
| Number of Sheds | 125 | |
| Raw Materials | End Fitting - Socket | Forged Steel or Cast Steel, Hot Dip Galvanized |
| End Fitting - Ball | Forged Steel, Hot Dip Galvanized | |
| Min. Galvanization Thickness | 86 μm | |
| Split Pin | Stainless Steel | |
| Core Material | Epoxy & Glass Fiber, Acid-Resistant Type | |
| Core Diameter | Ø24 mm | |
| Weather Sheds Material | HTV Silicone | |
| Color | Grey | |
| Grading Ring Material | Aluminum Alloy | |
| Mechanical | Specified Mechanical Load (SML) | 160 kN |
| Routine Test Load (RTL) | 80 kN | |
| Standard | IEC 61109 | |
| Electrical | Rated Voltage | 400 kV |
| Wet Power Frequency Withstand Voltage | 770 kV | |
| Lightning Impulse Withstand Voltage | 1425 kV | |
| Standard | IEC 61109 | |
| Weight | Approx. | 153 kg |
Global Project References
The following shows our composite insulators in service on a 400 kV high-voltage transmission line in Europe. Installed in 2011, they have been operating reliably ever since, proving their excellent performance under harsh conditions.
Certifications & Compliance
This test report focuses on the prototype test of FXBW-500 AC composite suspension insulators supplied by Wuhan Line Power Transmission Equipment Co., Ltd., with all test results complying with GB/T 19519-2014 (IEC 61109:2008, MOD) requirements.
Applicable Standard: GB/T 19519-2014 (equivalent to IEC 61109:2008, MOD).
Test Type: Prototype test covering design tests, material tests, type tests, and sample routine tests.
Key Test Items & Core Results
End Fitting Interface & Connection Tests: Passed sudden load release (165kN/275kN), thermal-mechanical cycles (-35°C to +50°C, 4 cycles), 42h boiling NaCl water immersion, steep-front impulse voltage (1000-1500kV/μs), and dry power-frequency voltage tests (flashover voltage 401.8-402.8kV).
Shed & Housing Material Tests: Hardness reached 65-66 Shore A (≤1.5% post-boiling difference); 1000h UV aging showed no cracks (surface roughness 5.28-6.14μm); passed tracking/erosion (19.7kV, 1000h), flammability (FV-0), and hydrophobicity tests (θav ≥106.1°).
Core Material Tests: Passed dye penetration, 100h boiling water diffusion (leakage current ≤42μA), and stress corrosion withstand tests (377kN, 96h); average mechanical failing load of assembled cores was 740.4kN.
Type & Sample Tests: Met dry/wet lightning impulse withstand voltage (up to +2314kV), corona extinction voltage (404.4kV), and dimensional requirements (insulation length 4450±50mm); mechanical routine tests (275kN, 10s) showed no damage.
Test Institution & Credibility
The test was conducted by the Power Industry Quality Inspection and Test Center for Electric Equipment (affiliated to China Electric Power Research Institute, CNAS-accredited: CNASL0699).
The report is valid with official seals and signatures of compilation, inspection, verification, and approval, ensuring legal and technical authority.
'Truth and honesty' is our management ideal for 24kv/27kv 70kn Polymeric Suspension Insulator/Long Rod Insulator. Since the foundation of our company, all our employees have been committed to providing customers with excellent system solutions and comprehensive services. Our team through professional training.
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