What types of ADSS fiber optic cables are there

ADSS fiber optic cables are all-dielectric, self-supporting aerial cables available primarily in central tube and stranded (multi-loose tube) designs.

Overview of ADSS Cable

ADSS (All-Dielectric Self-Supporting) cables are designed to span between poles or towers without metallic components, making them safe for installation near high-voltage power lines (110 kV to 500 kV) and eliminating induced current risks . They incorporate high-strength non-metallic materials, typically aramid yarn (Kevlar®), to provide tensile strength and support their own weight across long spans, often up to 1,500 meters . The optical fibers inside are housed in loose buffer tubes or ribbon configurations, with water-blocking compounds and protective jackets to maintain long-term fiber integrity .

Primary Structural Types

1. Central Tube Design

• Structure: Optical fibers are placed in a single PBT loose tube filled with water-blocking gel. Aramid yarn is helically wrapped around the tube, and the assembly is extruded with a PE (polyethylene) or anti-tracking (AT) outer jacket .
• Applications: Ideal for short to medium spans (50–150 meters) and low to medium fiber counts (12–48 cores).
• Advantages: Compact, cost-effective, and simpler to install.

2. Stranded (Multi-Loose Tube) Design

• Structure: Multiple loose tubes containing optical fibers are stranded around a central FRP (Fiber Reinforced Plastic) strength member. Aramid yarn and an outer jacket complete the assembly .
• Applications: Suitable for longer spans and higher fiber counts, providing greater tensile capacity.
• Advantages: Handles heavier mechanical loads, wind, ice, and UV exposure better than central tube designs.

Fiber and Jacket Options

• Fiber Types: Supports single-mode (G.652D, G.657) and multimode (OM1–OM5) fibers.
• Fiber Counts: Ranges from 2 to 144 cores.
• Transmission: Single-mode fibers at 1310 nm or 1550 nm allow unrepeatered distances up to 100 km .
• Jackets: PE or AT jackets protect against moisture, UV radiation, and environmental stress.

Key Benefits

• Non-metallic construction ensures safety near energized lines.
• Self-supporting design eliminates the need for messenger wires.
• Versatile span lengths from 50 m to over 1,500 m.
• Durable under wind, ice, and UV exposure, suitable for utility, telecom, and rural broadband projects . In summary, the type of ADSS fiber optic cable is determined by its structural design (central tube or stranded), fiber count, and span requirements, with both types engineered to provide safe, reliable, and long-lasting aerial fiber deployment without metallic components.