National standard OPGW optical cable

Description :

　　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, which leads to an increase in cable diameter and weight, thus affecting the strength of the transmission tower

　　There are three main types of OPGW optical cables: aluminum tube type, aluminum skeleton type, and stainless steel tube type

　　OPGW fiber optic cables are mainly used on 500KV, 220KV, and 110KV voltage level lines. Due to factors such as power outages and safety, they are mostly applied on newly built lines. The price of OPGW fiber optic cables.

　　The applicable characteristics of OPGW optical cable 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 optical cable is metal armor, which has no effect on high-voltage corrosion and degradation;

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

　　(5) In the performance indicators of OPGW optical cables, the larger the short-circuit current, the more good conductors are needed for armor, which correspondingly reduces the tensile strength. However, in the case of a certain tensile strength, the price of OPGW optical cables needs to increase the short-circuit current capacity. Only by increasing the metal cross-sectional area can the cable diameter and weight be increased, which poses a safety issue for the strength of the transmission tower.

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• National standard OPGW optical cable