What are the key challenges and innovations in stringing new High-Temperature Low-Sag (HTLS) or composite conductors on existing overhead line structures?

2025-07-19

Stringing advanced conductors like HTLS or composite materials on existing structures presents unique challenges and requires specialized approaches:

  • Different Handling Characteristics: HTLS and composite conductors often have different bending radii, surface sensitivities, and weight characteristics compared to traditional ACSR. This demands OHTLstringingequipment.com/Stringing-Blocks--Sheaves.html target='_blank'>Stringing Blocks with specific groove liners (e.g., polyurethane or nylon) and larger diameters to prevent conductor damage.

  • Precise Tension Control: The inherent low-sag properties of HTLS conductors require even more precise tension control during stringing to achieve the exact design sag. Our hydraulic OHTLstringingequipment.com/Hydraulic-Conductor-Tensioners.html target='_blank'>Tensioners are engineered for this high level of accuracy.

  • Reduced Clearances: When reconductoring existing lines, maintaining minimum approach distances (MAD) to energized circuits or ground obstacles becomes even more critical due to the limited space and often active environment. This necessitates strict adherence to tension stringing methods.

  • Aging Infrastructure Compatibility: Ensuring new, heavier, or more rigid conductors are compatible with existing towers and foundations requires careful structural analysis and sometimes reinforcement.

  • Innovations:

    • Specialized Stringing Blocks: Development of stringing blocks with multi-radius grooves and advanced non-abrasive lining materials.

    • Adaptive Puller-Tensioner Systems: Equipment with enhanced feedback loops and adaptive controls to manage the unique tensioning requirements of these conductors.

    • Simulated Stringing: Use of software to model the stringing process with new conductor types to identify potential issues before field deployment.

We offer a range of specialized stringing equipment and accessories specifically designed for the safe and efficient installation of HTLS and composite conductors, ensuring successful grid upgrades.

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