Installed at the top of high-voltage transmission towers, OPGW replaces traditional static or ground wires and provides a protected fiber-optic backbone for utility communications, teleprotection, SCADA, and long-distance telecom links — all while protecting the power line from. Installed at the top of high-voltage transmission towers, OPGW replaces traditional static or ground wires and provides a protected fiber-optic backbone for utility communications, teleprotection, SCADA, and long-distance telecom links — all while protecting the power line from. At the top of high-voltage transmission lines, a special optical cable integrating dual functions is silently supporting the stable operation of the energy network – this is the OPGW optical cable (optical fiber composite overhead ground wire). It breaks down the traditional boundaries between. OPGW cable, short for Optical Ground Wire or Optical Fiber Composite Overhead Ground Wire, represents a sophisticated engineering solution that integrates two critical functions into a single overhead cable. Such cable combines the functions of grounding and telecommunications. An OPGW cable contains a tubular structure with. An optical fiber composite overhead ground wire (OPGW) is a new type of ground cable used in the high-voltage power transmission system that serves as both a conventional overhead ground cable and a communication optical cable.