Albania Power OPGW Optical Cable Fitting Specifications

OPGW cables for Albania's power transmission lines combine optical fiber communication with overhead ground wire functionality, featuring a central stainless steel tube, aluminum or aluminum-clad steel layers, and robust mechanical and electrical performance. Cable Construction and MaterialsOPGW cables are designed to replace traditional shield or earth wires on high-voltage transmission lines while providing optical communication capabilities. Typical construction includes: Central optical unit: Fibers are housed in a gel-filled stainless steel tube, providing tensile strength, crush resistance, and protection against environmental stress during installation and operation.

Aluminum or aluminum-clad steel layers: Surrounding the central tube, these layers provide mechanical strength, electrical conductivity, and lightning protection. Optional aluminum pipe: Enhances thermal protection and crush resistance for the optical fibers. Fiber counts: Standard designs accommodate up to 96 fibers, with compact diameters starting around 12 mm, suitable for retrofitting existing transmission towers.

Mechanical and Electrical Specifications

Tensile strength: Stainless steel tube and armored layers ensure the cable withstands wind, ice, and mechanical stresses typical of overhead lines. Electrical fault handling: OPGW provides a path to ground for short-circuit currents and lightning strikes without damaging the optical fibers. Sag and tension: Cable design must consider Sag10™ calculations for proper tensioning and tower loading.

Diameter and weight: Compact designs reduce additional load on poles and towers, facilitating installation on existing structures.

Fiber Protection and Performance

Loose tube design: Fibers are loosely buffered in a water-blocking gel-filled tube to prevent strain during installation and operation. Optical performance: Standard single-mode fibers are used, typically measured at 1310 nm and 1550 nm, with low attenuation and high reliability. Environmental resistance: Stainless steel and aluminum layers protect fibers from lateral pressure, twisting, and corrosion.

Installation Guidelines

Compliance with ITU-T L. 151: Installation should follow ITU-T recommendations, including handling reels, stringing, and splicing procedures. Anchoring and fittings: Cable ends must be securely fastened to drums with shrinkable caps, and closures should allow for splicing and storage of spare fibers.

Branching and splicing: Use of extension collars and splice trays is recommended for high fiber counts, ensuring minimal strain and reliable connections.

Summary

For Albania's power transmission projects, OPGW cables should be selected based on: Fiber count and optical performance requirements. Mechanical strength and electrical fault tolerance. Compatibility with existing tower structures and sag/tension limits.

Compliance with international standards (ITU-T L. 151) and manufacturer specifications (e.g., AFL CentraCore, Prysmian, RLBCable) for installation and splicing. This ensures reliable dual-function performance: protecting the transmission line while providing high-quality optical communication.