Beijing Yunnan Ningxia ADSS24 core fiber optic cable manufacturer ADSS-36B1-400M-AT fiber optic cable price

Description :

　　The national standard for ordinary optical cables specifies the mechanical strength that optical cables used in different ways (such as overhead, pipeline, direct burial, etc.) should have. ADSS optical cable is a self-supporting overhead cable, so it must not only withstand the long-term effects of its own gravity, but also withstand the baptism of the natural environment. If the mechanical performance design of ADSS optical cables is unreasonable and not suitable for local weather, there will be safety hazards and the lifespan of the cables will be reduced. Therefore, each ADSS fiber optic cable project must be based on the natural environment in which the fiber optic cable is routed and the installation span of the ADSS can reach 1800 meters per block. It has high voltage resistance, good electrical corrosion resistance, lightning protection, can be laid on transmission line towers at a voltage level of 500kV, and has strong resistance to bullet strikes. Generally, sand guns at a distance of more than 10 meters will not cause catastrophic damage to the fiber optic cable. It also has strong low-temperature resistance and environmental adaptability. Fiber optic cables are laid independently without relying on power transmission lines, making construction and maintenance relatively convenient, and do not require power outages. Fiber optic cables are also relatively inexpensive. The characteristic optical cable has a different structure from overhead conductors, and its tensile strength is borne by aramid rope. The elastic modulus of aramid rope is more than half that of steel, and the thermal expansion coefficient is a fraction of that of steel, which determines that the sag of ADSS optical cable is more sensitive to external load changes. Under icing conditions, the elongation of ADSS optical cables can reach 0.6%, while the elongation of conductors is only 0.1%; The sag is relatively slow to temperature changes, and remains basically unchanged during temperature changes; Under strong wind conditions, the wind deflection angle is very large. At a wind speed of 30m/s, the wind deflection angle can reach 80 °, while the wind deflection angle of the wire is only about half of that of the optical cable.

　　Strong ability to withstand harsh weather conditions such as strong winds and icing.

　　ADSS Optical Cable Structure Diagram

　　1. Central tubular structure

　　The optical fiber is placed in a PBT (or other suitable material) tube filled with water-resistant grease with a certain excess length, wrapped with suitable spun nylon yarn according to the required tensile strength, and then extruded into PE (≤ 12KV electric field strength)

　　）Or AT (≤ 20KV electric field strength) sheath.

　　The central pipe structure is easy to obtain small diameters and has low ice and wind loads; The weight is relatively light, but there is a limit to the remaining length of the optical fiber.

　　2. Layered twisted structure

　　The fiber optic loose tube is wound at a certain pitch on the central reinforcement (usually FRP) and then extruded with an inner sheath (which can be omitted under low tension and small span), and then wrapped according to the required tensile strength

　　Suitable spun nylon yarn, then extruded with PE or AT sheath. The cable core can be filled with grease, but when ADSS operates at larger spans and with larger sag, due to the lower resistance of the grease, the cable core is prone to“

　　Sliding "can cause changes in the pitch of the loose casing. The use of appropriate methods to fix the loose sleeve onto the central reinforcement and dry cable core can be overcome, but there are certain technical difficulties.

　　The layered twisted structure is easy to obtain safe fiber excess length, although the diameter and weight are relatively larger, it has advantages in medium to large-span applications.

　　3. Technical parameters

　　ADSS optical cables work in an overhead state supported by two points over a large span (usually several hundred meters, or even more than 1 kilometer), which is completely different from the traditional concept of "overhead" (the overhead suspension line hook of postal and telecommunications standards).

AfterSalesService :

• Beijing Yunnan Ningxia ADSS24 core