An Optical Ground Wire (OPGW) cable works as a grounding cable by providing a path for electrical faults on the transmission line. The cable is designed to replace traditional static/shield/earth wires on overhead transmission lines and serves a dual function as a ground wire and a communication network. OPGW cables are made up of a tubular structure with one or more optical fibers in it, surrounded by layers of steel and aluminum wire. The cable is run between the tops of high-voltage electricity pylons, and the optical circuits are protected from accidental contact by the high voltage cables below.
OPGW cables are primarily used by the electric utility industry and are placed in the secure topmost position of the transmission line where they “shield” the all-important conductors from lightning. The cable must be capable of withstanding the mechanical stresses applied to overhead cables by wind, ice, and other environmental factors. It must also be capable of handling electrical faults on the transmission line by providing a path.
The outer appearance of OPGW is similar to aluminum-conductor steel-reinforced cable (ACSR), and the cable is designed to be installed on transmission and distribution lines. The fiber inside the cable could be 1~96 core or even more, and the fiber is protected by aluminum clad steel wire sometimes with aluminum wire. In most countries, aluminum clad PBT tube is used, considering the good performance on anti-electrochemical corrosion. However, with the development of the industry, cable SST tube OPGW is increasing.
OPGW cables work as grounding cables by providing a path for electrical faults on the transmission line, while also serving as a communication network. They are designed to replace traditional static/shield/earth wires on overhead transmission lines and must be capable of withstanding the mechanical stresses applied to overhead cables by wind, ice, and other environmental factors.
Post time: Jan-26-2024