The use of all-dielectric materials is due to the fact that the cable is in a high-voltage, high-energy environment and must withstand the effects of high voltage. Since it is used overhead on the power pole tower, it must have a matching pendant to fix the cable to the tower. That is, the ADSS cable has three key technologies: the mechanical design of the cable, the determination of the suspension point, and the selection and installation of the matching hardware.
The mechanical properties of ADSS fiber optic cable are mainly reflected in the maximum operating tension, average running tension and ultimate tensile strength of the cable. The national standard for ordinary optical cables specifies the mechanical strength that optical cables with different modes of use (such as overhead, pipelines, direct burial, etc.) should have. The ADSS cable is a self-supporting overhead cable, so it must withstand the long-term effects of its own gravity and must withstand the baptism of the natural environment. If the mechanical performance of the ADSS cable is not designed properly and is not compatible with the local weather, the cable will have a safety hazard and the life will be compromised. Therefore, each ADSS cable project must be designed with professional software according to the natural environment and span of the cable routing to ensure that the cable has sufficient mechanical strength. When the transmission line is already equipped with a ground wire and the remaining life is still quite long, it is necessary to build the optical cable system with low installation cost as soon as possible, and avoid the power outage operation, etc., the ADSS cable has great advantages.
ADSS cable jacket
ADSS cables use different jackets for different power routes. The most common ADSS jackets are available in two types: PE jacket and AT jacket. PE sheath is ordinary polyethylene sheath and used for power lines below 110KV. AT sheath is anti-tracking sheath and used for power lines above 100KV.
The characteristics of the ADSS cable are as follows
(1) Designed specifically for power systems, it is a self-supporting overhead cable with full- dielectric and its structure does not contain any metal materials;
(2) Fully-dielectric structure and high withstand voltage index are conducive to racking workers on overhead power lines with live operation, without affecting line operation;
(3) The anti-strand material with high tensile strength can withstand strong tension, meet the requirements of large span of overhead power lines, and prevent cockroaches and artificial shots;
(4) The thermal expansion coefficient of the ADSS cable is small. When the temperature changes greatly, the arc of the cable has little change, and its weight is light, and the load of ice and wind is small.