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OPGW integrates optical fibers within the overhead ground‑wire of high‑voltage transmission lines. It forms an optical‑fiber‑based communication network along power transmission corridors. Serving dual purposes, OPGW functions both as a power‑line shielding ground wire and a reliable communication medium. 对照阅读

• Simultaneously stranded design: stainless‑steel tube optical‑fiber units mixed with other metallic wires
• Stainless‑steel tube packaging provides optimized fiber excess length
• Second‑layer stranded stainless‑steel tube units create enhanced, consistent tensile excess length
• Precisely optimized cross‑section ensures reliable electrical, mechanical‑physical and thermal‑stability performance
• Max. cross‑section: 400mm²
• Rated breaking strength:＞500kN
• Max. fiber count:＞288 cores

• Products can be engineered by adjusting the aluminium‑to‑steel cross‑section ratio without modifying the optical cable structure, to fully satisfy the technical specifications of target transmission lines.
• Compared with aluminium‑tube OPGW designs, thin‑walled stainless‑steel‑tube OPGW delivers superior side‑pressure and impact resistance. Featuring low electrical conductivity, high mechanical strength and outstanding corrosion resistance, the stainless‑steel tube provides robust protection for internal optical fibres.
• High‑strength, low‑conductivity aluminium‑clad steel wires bear the cable's self‑weight and external mechanical loads. Leveraging the skin‑effect principle, fault‑current and overload‑current are diverted through outer high‑conductivity conductors, which effectively protects optical fibres.
• Grease filling inside the stainless‑steel tube blocks ingress of moisture and water. Tunable excess‑fiber‑length enables excellent thermal performance of the cable.
• Available in extra‑large cross‑section and ultra‑high‑strength variants for 1000kV AC and ±800kV DC UHV transmission lines. Ultra‑low‑loss fibres (≤0.17dB/km) can be adopted to support ultra‑long‑distance signal transmission.
• With mechanical and electrical properties comparable to conventional overhead earth‑wires, OPGW simplifies replacement of existing legacy ground‑wires as well as design & installation for new‑build lines. It performs dual functions: overhead ground‑wire plus optical‑communication link.
• Precisely‑controlled excess‑fiber‑length guarantees reliable performance under heavy mechanical loads and long‑span deployment scenarios.