OPGW (Optical Ground Wire) is a high-tech, dual-function cable used on overhead power transmission lines. It's designed to replace the traditional shield or ground wire at the top of the tower. Its primary functions are:

1. Lightning Protection & Grounding: As a ground wire, OPGW shields the phase conductors from lightning strikes. It provides a low-impedance path to safely dissipate fault currents to the ground, protecting the entire transmission system from damage and minimizing power outages.

2. High-Speed Data Transmission: The cable contains embedded optical fibers, creating a robust, secure, and high-bandwidth communication path. This fiber optic core is essential for modern grid management, enabling real-time monitoring, data transmission, and control systems.

The combination of these two functions makes OPGW a cost-effective and future-proof solution for utilities and power companies worldwide.