All-dielectric self-supporting optical cable is a non-metallic optical cable that is composed entirely of dielectric materials, contains the necessary support system, and can be directly suspended on power poles and towers. It is mainly used for communication routes of overhead high-voltage power transmission systems, and can also be used for communication lines in overhead laying environments such as areas prone to lightning and large spans.
ADSS optical cable is also called all-dielectric self-supporting optical cable. All-dielectric means that the optical cable uses all-dielectric materials, and self-supporting means that the optical cable's own reinforcement components can withstand its own weight and external loads. This name points out the use environment and key technologies of this optical cable:
Because it is self-supporting, its mechanical strength is very important; all-dielectric materials are used because the optical cable is in a high-voltage and strong-electric environment and must be able to withstand the influence of strong electricity; because it is used overhead on power poles and towers, there must be matching hangers to fix the optical cable on the poles and towers.
That is, ADSS optical cable has three key technologies: optical cable mechanical design, determination of suspension points, and selection and installation of matching tools.
ADSS optical cable mechanical properties are mainly reflected in the maximum allowable tension (Maximum Allowable Tension, referred to as MAT), the average annual operating tension (Every Day Strength, referred to as EDS) and the ultimate tensile strength (Ultimate Tensile Strength, referred to as UTS).
The national standard for ordinary optical cables clearly stipulates the mechanical strength that optical cables should have for different usage methods (such as overhead, pipeline, direct burial, etc.). ADSS optical cables are self-supporting overhead optical cables, so in addition to having to withstand the long-term effects of their own gravity, they must also be able to withstand the baptism of the natural environment.
If the mechanical performance design of ADSS optical cables is unreasonable and not adapted to the local weather, there will be safety hazards in the optical cables and their lifespan will be reduced.
Therefore, each ADSS optical cable project must be based on the natural environment and span of the optical cable route. The span of ADSS can reach 1800 meters/block, with high voltage resistance, good anti-electrolytic corrosion performance, and lightning protection. It can be laid on the transmission line tower of 500kV voltage level, and has strong anti-ballistic performance. The general sand gun will not cause fault damage to the optical cable when shooting at a distance of 10 meters.