The following is a professional explanation of the structure of the OPGW optical cable.
OPGW optical cable is suitable for installation on transmission lines, and has the dual function of ground wire (designed to replace traditional static or shielded wires) and communication wire. The OPGW conducts short circuit currents and provides lightning protection as it "shields" the conductor while providing a telecommunication path for internal and third-party communications. OPGW must be able to withstand the mechanical and environmental stresses caused by overhead cables (such as those caused by wind or ice). The OPGW must also be able to handle electrical faults on the transmission line by providing a path to ground while preventing damage to the delicate optical fibers inside the cable.
OPGW optical cable has two structures:
Central Loose Tube --- Fibers are placed loosely in a sealed, waterproof central aluminum tube filled with water-blocking gel. The tube provides protection for the optical fiber during installation and operation in harsh environmental conditions. According to engineering requirements, stainless steel pipes can also be aluminum-clad steel. The stainless steel light pipe is located in the center of the optical cable, protected by single or multi-layer aluminum clad steel, aluminum alloy wire or steel wire. Metal wires provide mechanical strength to withstand harsh installation and operating conditions, while enabling electrical conductivity to control temperature rise under short-circuit conditions.
Each fiber can be clearly distinguished using the fiber identification system, which consists of coloring and the number of ring marks on it. This compact design offers high mechanical strength and a small diameter fault current rating. The smaller diameter also has good sag tension properties.
Loose tube type --- The fibers are loosely placed in a sealed waterproof stainless steel tube, which is filled with water-blocking gel. Two or three layers of stainless steel optical tubes are helically stranded in the inner layer of the multilayer optical fiber cable. The loose tube type is mainly designed for the number of optical fibers exceeding 48 cores. Loose tube type can meet the requirements of huge crossover and large current capacity.
Optical fibers are made of high-purity silica and germanium-doped silica. A UV curable acrylate material is applied over the fiber cladding as a primary protective coating for the fiber. The optical fiber uses a special rotating device to successfully control the value of PMD to ensure stability during wiring.
The above is the structure of the OPGW optical cable for you, and we will continue to provide more knowledge about optical cables on the website.
