ADSS Optical Cable Introduction
ADSS optical cable is also called all-dielectric self-supporting optical cable. All-dielectric namely optical cable uses all-dielectric material. Self-supporting means that the reinforcing member of the optical cable can bear its own weight and external load. This name points to the use environment and key technologies of this type of optical cable: because it is self-supporting, its mechanical strength is of great importance; the use of all-dielectric materials is because the optical cable is in a high-voltage and strong-electric environment, and must be able to withstand strong electricity Impact; Because it is used overhead on a power pole tower, there must be matching hangers to fix the optical cable on the pole tower. That is, ADSS optical cable has three key technologies: optical cable mechanical design, determination of suspension points, and selection and installation of supporting hardware.
The mechanical properties of ADSS optical cables are mainly reflected in the maximum allowable tension (MAT), the average daily strength (EDS), and the ultimate tensile strength (UTS) of the optical cable.
The national standards for ordinary optical cables clearly stipulate the mechanical strength of optical cables with different usage methods (such as overhead, pipeline, direct buried, etc.). ADSS optical cable is a self-supporting overhead optical cable, so in addition to bearing the long-term effect of its own gravity, it must also be able to withstand the baptism of the natural environment. If the mechanical performance design of the ADSS cable is not reasonable and is not compatible with the local weather, there will be hidden safety hazards and the life of the cable will be reduced. Therefore, each ADSS cable project must be based on the natural environment of the cable route and the span of the ADSS. The installation distance can reach 1800 meters per block, with high voltage resistance, good resistance to electrical corrosion, and lightning protection. It is laid on the pole tower of the transmission line and has strong anti-ballistic performance. The ordinary sand gun will not cause faulty damage to the optical cable when it is fired from a distance of 10 meters. It also has strong low temperature resistance and environmental adaptability. The optical cables are laid independently without relying on power transmission lines, which is convenient for construction and maintenance, and does not require power outages, and the optical cables are also relatively cheap.
Product model: ADSS-24B1-100M
Product structure: PBT loose tube, non-metallic core reinforcement (FRP), PE inner sheath, aramid fiber layer, PE outer sheath or anti-tracking outer sheath
Laying method: overhead
Operating temperature: -40 ℃ ～ 65 ℃
Application: It is used for communication lines in overhead laying environments such as overhead high-voltage power transmission systems, lightning-prone zones, and long spans.
First, ADSS optical cable structure
1. ADSS optical cable design elements:
2. Environmental meteorological areas: 1. Wind speed 2. Ice thickness 3. Air temperature 4. Topography
3. Erected power lines: 1. Rated high voltage and maximum operating voltage
4. Type of tower and type and arrangement of wire and ground wire
5. Tension length, standard range (representing range, maximum horizontal range, maximum vertical range)
6. The maximum sag of the wires and ground wires of each tensile section.
Two, ADSS optical cable characteristics:
1. Reasonable design and precise control of the excess length of the optical fiber in the loose tube, so that the optical cable has excellent tensile performance and temperature performance.
2. Accurately control the aramid twisting process and improve the tensile strength of the optical cable.
3. The space potential of the cable laying area is not greater than 110KV, and ordinary PE outer sheath is used. The space potential of the cable laying area is greater than 110KV, and the anti-tracking sheath AT is used.
4. Light weight and small cable diameter, reducing the impact of ice and wind and the load on towers and supports.
5. Large span, the maximum span can be erected continuously over 1000 meters.
6. Engineering Aided Design (arc tension gauge, field strength calculation, hanging point selection, hardware configuration).
Three, ADSS optical cable application range:
(1) In the old and new power lines, the same towers as the power lines are erected;
2 (2), occasions requiring a large leap;
(3), strong electric fields, multiple lightning, cold and other areas;
Four, ADSS optical cable sheath classification:
PE sheath: ordinary polyethylene sheath. For power lines below 110KV.
AT sheath: anti-tracking sheath. For power lines above 100KV.
ZY Sheath: Flame retardant polyethylene sheath.
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