ADSS optical cable materials

ADSS optical cables are constructed from optical fibers, strengthening materials, protective layers, and outer sheaths, all designed to be fully dielectric and self-supporting.

Core Components and Materials

1. Optical Fiber Core

• Material: Silica (SiO₂) and alumina, providing high tensile and compressive strength .
• Function: Transmits data via light with minimal optical loss.
• Coating: Acrylates or similar polymers protect fibers from wear, moisture, and corrosion .
• Configuration: Fibers are arranged in loose buffer tubes or ribbon form, often with excess slack to prevent strain . 2. Strengthening Materials
• Materials: Fiberglass, carbon fiber, or aramid yarn (Kevlar®) embedded around the fiber core .
• Function: Provides tensile strength and rigidity, allowing the cable to span long distances without sagging or breaking under wind, ice, or mechanical load .
• Optional: Fiber Reinforced Plastic (FRP) rods may be used as central strength members for additional stability . 3. Protective Layer
• Materials: Polyethylene (PE), polyvinyl chloride (PVC), or PE-A (arc-resistant) for high-voltage environments .
• Function: Insulates and protects the fiber core from environmental factors, electrical tracking, and mechanical damage.
• Additional Features: Water-blocking yarns or thixotropic gel may be included to prevent moisture ingress . 4. Outer Sheath
• Materials: Polyethylene (PE), PVC, or dual-layer sheaths for enhanced mechanical protection .
• Function: Protects the entire cable from abrasion, UV radiation, and environmental corrosion.
• High-Voltage Adaptation: AT coatings are applied in cables installed on lines ≥35 kV to prevent electrical tracking .

Summary of Material Functions

• Silica/Alumina fibers: Optical transmission
• Acrylate coatings: Fiber protection
• Fiberglass/Aramid/Kevlar®: Tensile strength
• PE/PVC/PE-A layers: Insulation and environmental protection
• FRP rods (optional): Structural stability
• Water-blocking gels/yarns: Moisture resistance ADSS cables are designed to be lightweight, fully dielectric, and capable of spanning long distances between towers without metal support, making them suitable for installation along high-voltage power lines while maintaining optical performance and mechanical durability .