Optical Ground Wire (OPGW) and High-Temperature Low-Sag (HTLS) conductors represent advanced conductor technologies, requiring specialized "Cable Stringing Tools" that prioritize precision, gentleness, and specific handling requirements to prevent damage and ensure long-term performance.

For OPGW (Optical Ground Wire):

• OPGW Specific Pulling Grips (Pulling Socks): These are designed with longer, finer, and often softer mesh weaves that distribute the pulling force over a larger surface area, minimizing localized pressure that could crush or damage the delicate optical fibers within the OPGW's core. They often feature an internal steel thimble to prevent fiber compression.

• Anti-Twist Swivels: Absolutely critical for OPGW. The optical fibers within OPGW are highly sensitive to torsion. High-quality, robust anti-twist swivels must be placed directly between the pulling grip and the pulling rope to absorb any rotational forces, ensuring the OPGW remains untwisted during the entire stringing process.

• Larger Diameter Stringing Blocks/Sheaves: OPGW has a precise bend radius. Using larger diameter stringing blocks ensures that the OPGW is not bent too sharply, which could cause micro-bends or macro-bends in the optical fibers, leading to signal loss. The grooves must also be smooth and free of any imperfections.

• Fiber Optic Testing Equipment (Post-Stringing): While not directly "stringing tools," portable OTDRs (Optical Time Domain Reflectometers) and Optical Power Meters (OPMs) are essential for immediate post-stringing testing to verify the integrity of the optical fibers and confirm no damage occurred during installation.

• OPGW Splicing & Termination Tools: For the communication aspect, specialized fiber optic splicing tools (cleavers, fusion splicers, cleaning kits) are used once the OPGW is strung.

For HTLS (High-Temperature Low-Sag) Conductors:

• Specialized HTLS Pulling Grips: HTLS conductors often have unique core materials (e.g., composite, Invar) and outer aluminum alloy strands that can be more susceptible to localized damage or deformation if not gripped correctly. Grips designed for HTLS ensure even pressure distribution and prevent "birdcaging" or strand damage.

• Precise Tension Control Systems: While this is largely equipment-related, the tools (dynamometers, tension recorders) that interface with this equipment are crucial. HTLS conductors rely on very specific tensioning parameters to achieve their low-sag characteristics, making precise monitoring tools indispensable.

• Larger Radius Stringing Blocks: Similar to OPGW, HTLS conductors, especially those with large diameters, benefit from larger radius stringing blocks to prevent excessive bending stress on the conductor and its composite core.

• Anti-Vibration Dampers & Installation Tools: HTLS conductors can be more prone to certain types of vibration. The specialized tools for installing vibration dampers (e.g., Stockbridge dampers, spacer dampers) are essential once the conductor is strung and sagged.

In both cases, meticulous planning, use of manufacturer-approved tools, and highly trained personnel are non-negotiable for successful and reliable installation of these advanced conductors.