48 core fiber optic cable price OPGW composite fiber optic cable characteristic parameters installation OPGW fiber optic cable precautions

Description :

　　I believe many people have heard of the ground wire composite optical cable, also known as OPGW composite optical cable, which is mainly used in power transmission lines. OPGW optical cables generally come in several types, such as skeleton type, center tube type, and layer twisted type. To better use OPGW composite optical cables, it is necessary to understand the characteristics and parameters of OPGW composite optical cables and the precautions for installing OPGW optical cables. Let's learn together below.

　　Characteristics of OPGW optical cable

　　The optical cable armor layer has excellent mechanical strength characteristics, therefore, the optical fiber can be well protected from wear, tensile stress, and lateral pressure, fundamentally ensuring that the optical fiber is not damaged by external forces. The armor layer of the optical cable has excellent resistance to lightning discharge and short-circuit current overload, so the optical fiber can still operate normally under lightning and short-circuit current overload conditions.

　　The specially designed OPGW optical cable can directly replace the overhead ground wire of the original high-voltage line without replacing the original tower head; Synchronize the construction of optical cable communication system with high-voltage lines, which can save the construction cost of optical cables and reduce the cost of communication engineering; The cable diameter is small, the weight is light, and it will not bring significant additional load to the iron tower; Operating temperature -40 to+70 ℃.

　　Issues to be noted when choosing to use OPGW optical cable

　　Reasonably choose the outer sheath of the optical fiber. There are three types of fiber optic outer sheath pipes: plastic pipes made of organic synthetic materials, aluminum pipes, and steel pipes. Plastic pipes have low cost. To meet the protection requirements of plastic pipe sleeves against ultraviolet radiation, it is necessary to use fewer layers of armor. The plastic pipe OPGW has a short-term temperature rise capacity of less than 180 ℃ caused by short-circuit current; Aluminum tubes have a lower cost.

　　Due to the low impedance of aluminum, it can increase the ability of OPGW armor layer to withstand short-circuit current. The ability of aluminum tube OPGW to withstand short-term temperature rise caused by short-circuit current is less than 300 ℃; Stainless steel pipes are expensive. However, due to the thin wall of steel pipes, the number of optical fiber cores installed in stainless steel pipes under the same cross-sectional conditions is higher than that in plastic pipes and aluminum pipes. Therefore, the unit cost of optical fiber cores is not high under multi-core conditions. The ability of steel pipe OPGW to withstand short-term temperature rise can reach 450 ℃. Users can choose the optical fiber outer sheath reasonably according to the specific situation of the project.

　　When replacing the old line ground wire with OPGW optical cable, it is necessary to choose an OPGW with mechanical and electrical characteristics equivalent to the original overhead ground wire. The outer diameter, unit length weight, tensile strength, elastic modulus, coefficient of linear expansion, short-circuit current and other parameters of OPGW are close to the existing ground wire parameters. This not only avoids changing the existing tower head and reduces the amount of renovation work, but also ensures the safe distance between OPGW and the existing phase conductor, ensuring the safe operation of the power system.

　　The installation of OPGW optical cable is similar to the installation of ADSS optical cable, and the hardware used is almost the same, except for the different hanging points. OPGW optical cable needs to be installed at the position of the overhead ground wire. The intermediate joint position of the optical cable line must be placed on the tension tower through a distribution plate.

　　Another point to note is: choose loose fitting fiber optic cables instead of tight fitting fiber optic cables. Because optical fibers can have a certain amount of excess length inside the loose tube, the control range is between 0.0% and 1.0%, with a typical value of 0.5% to 0.7%. When the optical cable is stretched during construction or under the action of gravity and wind, as long as the stretching length of the optical cable is within the remaining length range, the optical fiber has strain capacity and does not bear tension, thereby ensuring that the transmission quality of the optical fiber is not affected by external forces.

　　The above is a description of the characteristics and parameters of OPGW composite optical cables, as well as the details that need to be paid attention to when installing OPGW optical cables. We hope that you can record any unclear information. We have been focusing on the research and sales of optical communication products for 10 years, and have accumulated over 10000 types of optical communication products, including standard products such as optical cables, optical jumpers, MPO/MTP data centers, and optical distribution frames. You can purchase all optical communication products in one stop.

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