High voltage overhead transmission line OPGW optical cable OPGW-24b1-110 aluminum clad steel stranded wire

Description :

　　 High voltage overhead transmission line OPGW optical cable OPGW-24b1-110 aluminum clad steel stranded wire

　　OPGW fiber optic cable details introduction;

　　 OPGW optical cable, also known as fiber optic composite overhead ground wire, places optical fibers in the ground wire of overhead high-voltage transmission lines to form a fiber optic communication network on the transmission lines. This structural form combines the dual functions of ground wire and communication. OPGW optical cable is more reliable, stable, and firm due to the wrapping of metal wires. As the overhead ground wire and optical cable are combined into one, it not only shortens the construction period but also saves construction costs compared to using other types of optical cables.

　　(1) Generally used for high voltage lines exceeding 110kV, with a large span (all above 250M); (2) Easy to maintain, easy to solve line crossing problems, and its mechanical characteristics can meet the requirements for large line crossings; (3) The outer layer of OPGW optical cable is made of aluminum clad steel structure, which has no effect on high-voltage corrosion and degradation; (4) OPGW optical cables must be powered off during construction, resulting in significant losses. The OPGW optical cables used are generally used for new power lines; (5) The higher the short-circuit current of OPGW optical cable, the more good conductors are needed for armor, which correspondingly reduces the tensile strength. However, in the case of a certain tensile strength, to increase the short-circuit current capacity, the only way is to increase the metal cross-sectional area, which leads to an increase in cable diameter and weight, and the strength of the transmission tower needs to be correspondingly increased. OPGW fiber optic cable opgw-24b1-110 price OPPC fiber optic cable production and processing

　　Fiber optic cables have the characteristics of anti electromagnetic interference and light weight. They can be installed on the top of transmission line towers without considering issues such as hanging position and electromagnetic corrosion. Therefore, OPGW has significant characteristics such as high reliability, superior mechanical performance, and low cost. This technology is particularly suitable and economical for new installation or replacement of existing grounding wires.

　　Fiber optics utilizes the difference in refractive index between the core and cladding materials to transmit light energy through optical fibers, which has become a major revolution in the history of communication. Fiber optic cables are lightweight and compact, and have been adopted by power systems to transmit dispatch calls, remote signals, relay protection, television images, and other information between substations and central substations. In order to improve the stability and reliability of fiber optic cables, foreign countries have developed a structure that combines fiber optic cables with transmission lines, overhead ground wires, and power cables. OPGW optical cable is more reliable, stable, and sturdy due to the metal wire wrapping. As the overhead ground wire and optical cable are combined into one, it not only shortens the construction period but also saves construction costs compared to using other types of optical cables. In addition, if OPGW made of aluminum clad steel wire or aluminum alloy wire is used, it is equivalent to setting up a good conductor overhead ground wire, which can achieve various benefits such as reducing the potential supply current of transmission lines, reducing power frequency overvoltage, improving the interference and dangerous impact of power lines on communication lines, etc.

　　Common OPGW structures

　　There are three main types: aluminum tube type, aluminum frame type, and (stainless) steel tube type.

　　Application of OPGW optical cable

　　OPGW optical cables are mainly used on 500KV, 220KV, and 110KV voltage level lines. Due to factors such as power outages and safety, they are often applied on newly built lines.

　　The applicable characteristics of OPGW are:

　　(1) Lines with high voltage exceeding 110kV have a large span (usually above 250M);

　　(2) Easy to maintain, easy to solve for line crossing problems, and its mechanical characteristics can meet the requirements for large line crossings;

　　(3) The outer layer of OPGW is metal armor, which has no effect on high-voltage corrosion and degradation;

　　(4) OPGW must be powered off during construction, and the losses caused by power outages are significant. Therefore, OPGW should be used in the construction of new high-voltage lines above 110kV;

　　(5) In the performance indicators of OPGW, the larger the short-circuit current, the more it is necessary to use good conductors for armor, which correspondingly reduces the tensile strength. However, in the case of a certain tensile strength, to increase the short-circuit current capacity, the only way is to increase the metal cross-sectional area, resulting in an increase in cable diameter and weight, which poses a safety issue for the strength of the transmission tower.

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