What are the factors affecting ADSS optical cable distribution?

What is ADSS optical cable?

All-dielectric self-supporting (ADSS) cable is a type of optical fiber cable that is strong enough to support itself between structures without using conductive metal elements. It is used by electrical utility companies as a communications medium, installed along ex isting overhead transmission lines And often sharing the same support structures as the electrical conductors. ADSS fiber cable has the characteristics of full dielectric, no metal, non-conductivity, small cable diameter, high tensile force, low linear expansion coefficient, and wide temperature adaptation.

The distribution of ADSS optical cables is an important issue in the construction of ADSS optical cables. When the line and the situation are clear, it is necessary to consider the configuration of the ADSS optical cable. The factors that affect the configuration are:

(1) Since the ADSS optical cable is a power optical cable, unlike ordinary optical cables, it can be spliced arbitrarily (because the core of the optical fiber cannot be stressed), it must be carried out on the tension tower of the line, and because the conditions of the connection point in the field are poor, so each reel The length of the ADSS optical cable should be controlled within 3-5Km as much as possible. If the length of the coil is too long, it will be inconvenient for construction; if it is too short, the number of connections will be more, and the attenuation of the path will be large, which will affect the transmission quality of the optical cable.

(2) In addition to the length of the transmission line being the main basis for the length of the optical cable reel, the natural conditions between the poles and towers should also be considered, such as whether the traction machine is convenient to travel, whether the tension machine can be placed, etc.

(3) Due to the error of circuit design, the following empirical formula can be used for the distribution of ADSS optical cables:

Optical cable reel length = transmission line length × coefficient + construction consideration length + length for welding + line error;

Usually, the "coefficient" includes the line sag, the length of the tower's upward lead, etc. The length considered in the construction is the length used for the traction in the construction.

4) The minimum distance from the hanging point of ADSS optical cable to the ground is generally not less than 7m. When determining the configuration, the distance difference should be simplified to reduce the types of optical cables, which can reduce the number of spare parts (such as various suspension fittings, etc.). It is also convenient for construction.