After you confirm the order with us, 45kV composite polymer pin insulator, 25kV DS Insulator, 230kV Composite Line Post Insulator will be delivered at the time negotiated by both parties by default. The delivery time is fast and the price is reasonable. Our company is dedicated to continuous improvement and staying ahead of the curve in the rapidly changing global market. Our products and services are designed to help our customers achieve their goals. We continuously carry out technical improvement and research on existing varieties, enhance technical and economic indicators, and enhance the competitiveness of our products. Our company will always follow the principle of "mutual benefit and common development" and implement the tenet of "survive by quality, develop by credit".
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.
That has a positive and progressive attitude to customer's interest, our organization consistently improves our products quality to satisfy the demands of shoppers and further focuses on safety, reliability, environmental specifications, and innovation of High Voltage Long Rod Suspension Polymer Insulator. Our company adheres to the management concept of 'Science and Technology Innovation, Honest Service' and follows the advanced management mode of modern enterprises. We have established a scientific and complete management system to conduct comprehensive and strict management of production, sales and service. Please contact us at any time for more information.
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