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Hot-DIP Galvanized Link Fittings for Transmission Towers

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High-Performance Link Tower Transmission Power Fittings​ are precision-engineered components designed for ultra-high-voltage (UHV) transmission systems up to ​​±1100kV. Manufactured from ​hot-dip galvanized steel​ (Q345 grade, yield strength ≥345MPa)
and ​forged aluminum alloys, these fittings deliver ​30% higher tensile strength​ (failure load 100–300kN)
and ​50-year corrosion resistance​ in extreme environments (-30°C to +40°C)
. Certified for IEC 61284 and CENELEC HD 626 standards, they ensure zero electrical leakage, reduced tower load, and maintenance-free operation for grid infrastructure.
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Technical & Commercial Profile

1. Design Specifications & Material Science

Parameter Value Standard
Material Q345 steel / H68 aluminum ASTM A36, GB/T 1591
Galvanization Hot-dip zinc (65μm min) ISO 1461, ASTM A123
Tensile Strength 300–400 MPa (steel) ISO 6892-1
Failure Load 100–300 kN (model-dependent) IEC 61284
Operating Temp. -40°C to +90°C IEC 60068-2

Structural Innovation:

  • Modular Design: Flange-plate connections enable rapid tower assembly (CKD/SKD modes)

    .

  • Vibration Damping: Integrated anti-vibration grooves reduce conductor fatigue by 40%


  • Corrosion Defense: Dual-layer galvanization (zinc + chromate passivation) resists salt spray (IEC 60068-2-52)


2. Product Range & Competitive Advantages

Fitting Type Key Models Advantage vs. Industry Standard
Suspension Clamps UL-Type Shackle (UL-30)
20% higher load capacity (300kN vs. 250kN)
Yoke Plates L-Type Adjustment Plate
15% weight reduction + ISO-compliant bolt slots
Dead-End Clamps PT-Type Strain Clamp
Zero-slip conductor grip (IEC 61328)
Vibration Dampers Stockbridge Dampers
30% longer service life in high-wind zones

3. Critical Application Scenarios

Sector Use Case Technical Fit
UHV Transmission ±800kV DC lines 300kN failure load supports 70m spans
Coastal Grids Salt-air exposed towers 65μm galvanization prevents rust (50-year lifespan)
Renewable Integration Offshore wind farm connections -40°C cold resistance + anti-icing design
Urban Substations Busbar & insulator links Compact design (Ø≤50mm) for confined spaces

4. Compliance & Quality Assurance

  • Global Certifications: IEC 61284, CENELEC HD 626, GB/T 2314 (China), ISO 9001


  • Testing Protocol:

    • Tensile strength ≥400MPa (2000T testing machine)

    • Salt-spray resistance >5,000 hours (IEC 60068-2-52)

    • 3D dimensional tolerance ±0.1mm

  • Traceability: Batch-specific material reports (chemical composition, mechanical properties).

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