Georgia 24-core OPGW optical cable

A 24-core OPGW cable combines the functions of a ground wire and optical fiber transmission, designed for high-voltage overhead lines with robust environmental protection.Construction and Design

A 24-core OPGW cable consists of a central stainless steel tube housing 24 optical fibers, which are loosely buffered and gel-filled to prevent strain and protect against moisture . This central tube is encased in aluminum or aluminum-clad steel wires, sometimes in single or double layers, providing mechanical strength, electrical conductivity, and resistance to lightning strikes . The cable is designed to withstand mechanical stresses from wind, ice, and electrical faults while maintaining fiber integrity . The fibers are typically grouped in bundles of 12, with color-coded threads for easy identification, ensuring organized splicing and maintenance . The outer layers of aluminum and steel wires also enhance crush resistance and thermal protection for the fibers .

Applications

24-core OPGW cables are primarily used on high-voltage transmission and distribution lines, replacing traditional static or shield wires. They provide a dual function: grounding for electrical safety and a communication pathway for voice, data, and video signals . Common applications include:

• Power line protection and monitoring systems
• Unmanned substation monitoring
• Overhead test line observation systems
• Transmission of operational and maintenance data These cables are suitable for lines above 110 kV, where cutting power for installation is feasible, and for upgrading older lines to integrate fiber communications .

Advantages

• High reliability and long-term durability due to stainless steel tube and protective aluminum layers
• Environmental resilience, including protection against lightning, moisture, and extreme temperatures
• Compact and lightweight design, making it suitable for overloaded or space-constrained transmission towers
• High fiber density, allowing efficient communication without increasing cable diameter significantly

Manufacturers and Global Use

HuaDong Cable Group is a notable manufacturer of 24-core OPGW cables, exporting to countries including Malaysia, Philippines, Nigeria, and UAE . Other major suppliers include Prysmian and AFL, which offer similar OPGW designs with advanced fiber protection and high mechanical performance . These cables have been widely deployed worldwide, supporting both telecommunication and energy transmission needs. In summary, a 24-core OPGW cable in Georgia would provide a reliable, dual-purpose solution for high-voltage lines, combining grounding and optical communication capabilities with robust environmental protection and long-term operational stability .