Opgw48 core optical cable

The OPGW 48-core optical cable is a dual-function overhead cable combining lightning protection and high-speed optical communication, typically constructed with a central stainless steel tube housing the fibers, surrounded by aluminum-clad steel and aluminum alloy wires. OverviewOPGW (Optical Ground Wire) is designed for installation on high-voltage transmission lines, providing both grounding for lightning protection and a fiber-optic communication pathway. The 48-core configuration is widely used for smart grid applications, long-distance data transfer, and high-capacity communication systems.

It is suitable for new high-voltage lines (35 kV and above) or for replacing existing ground wires.

Construction

Central Tube: Fibers are housed in a stainless steel tube, often gel-filled to protect against moisture and environmental stress. Fiber Protection: Fibers are coated with UV-curable acrylate over high-purity silica and germanium-doped silica for durability. Armor Layers: The central tube is surrounded by aluminum-clad steel (ACS) wires and optionally aluminum alloy wires, arranged in single or multiple layers for mechanical strength and electrical conductivity.

Outer Sheath: Some designs include an aluminum pipe for additional crush resistance and thermal protection.

Fiber and Performance Specifications

Fiber Count: 48 fibers, typically grouped in bundles of 12 with standard color coding. Fiber Types: Customizable, commonly G. 652D and G.

655 fibers. Mechanical Properties: High tensile strength, resistance to lateral pressure, twist, and environmental stress such as wind, ice, and lightning. Electrical Properties: Provides a path for short-circuit currents and lightning strikes without damaging the fibers.

Applications

Transmission and distribution lines for voice, data, and video communications. Smart grid monitoring, including lightning waveform monitoring, unmanned substation monitoring, and power line protection systems. Suitable for high-voltage lines over 110 kV and retrofitting older lines.

Standards and Customization

Compliant with IEC 60794 and IEEE 1138 standards. Customizable in terms of fiber mix, sheath, armor layers, and accessories to meet specific environmental and mechanical requirements. Cable diameter and weight are optimized for minimal additional load on transmission towers while maintaining high fiber density.

Example Models (AFL CentraCore)CC-57/465: 48 fibers, 11. 8 mm diameter, 0. 467 kg/m weight, fault current 16.

25 kA²sec. CC-29/29/465: 48 fibers, 11. 8 mm diameter, 0.

354 kg/m weight, fault current 10. 5 kA²sec. CC-54/472: 48 fibers, 12 mm diameter, 0.

470 kg/m weight, fault current 15. 75 kA²sec. These models illustrate variations in diameter, weight, and fault current capacity, allowing selection based on mechanical and electrical requirements.

In summary, the OPGW 48-core cable is a robust, dual-function solution for modern high-voltage transmission systems, offering mechanical durability, environmental protection, and high-capacity optical communication in a single cable unit.