A 24-core OPGW cable typically contains 24 single-mode optical fibers in stainless steel tubes, reinforced with aluminum-clad steel wires, designed for high-voltage overhead lines with both grounding and communication functions.

Optical Fiber Specifications

• Fiber Type: Single-mode fibers, usually ITU-T G.652D, suitable for long-distance, high-bandwidth applications; G.655 fibers may be used for non-zero dispersion-shifted networks .
• Operating Wavelengths: 1310 nm and 1550 nm.
• Typical Attenuation: 0.35 dB/km at 1310 nm and 0.25 dB/km at 1550 nm .
• Protective Coating: UV-curable acrylate over the fiber cladding, sometimes with hydrogen-absorbing gel in PBT tubes to prevent degradation .

Mechanical and Structural Parameters

• Core Protection: Fibers are housed in stainless steel or PBT tubes, allowing movement under tension and temperature variations .
• Reinforcement: Aluminum-clad steel (ACS) wires or a combination of ACS and aluminum alloy wires surround the fiber core, providing tensile strength and mechanical protection .
• Tensile Strength: Typically ranges from 40 kN to 100 kN, depending on design and conductor cross-section .
• Short-Circuit Capacity: High, determined by conductor material and cross-section; ensures safety during electrical faults .
• Environmental Resistance: Designed to withstand lightning, extreme temperatures, moisture, and harsh outdoor conditions .

Electrical and Operational Features

• Dual Function: Acts as both a grounding wire for high-voltage lines and a communication medium for voice, data, and video signals .
• Installation Voltage: Suitable for high-voltage lines, typically above 110 kV .
• Temperature Range: Wide operational range to accommodate environmental variations, ensuring fiber integrity and cable performance .

Additional Considerations

• Manufacturer Quality: Performance and reliability depend on manufacturing quality; reputable manufacturers like Shandong Inlink Optoelectronic Technology Co., Ltd. and HuaDong Cable Group provide ISO-certified production and advanced quality control .
• Applications: Used in grid automation, real-time monitoring, unmanned substation monitoring, lightning waveform observation, and power line protection systems . In summary, a 24-core OPGW cable combines high-strength mechanical design, reliable optical communication, and electrical grounding capabilities, making it suitable for modern high-voltage transmission networks while ensuring long-term durability and performance.