The distribution of optical cables is an important issue in the construction of optical cables. When the adopted line and condition are clear, the distribution of the optical cable must be considered. The factors that affect the distribution are:
(1) Because ADSS optical cable is not like ordinary optical cable, it can be spliced arbitrarily (because the core of the optical fiber cannot be stressed), it must be carried out on the tensile pole of the line, and because of the poor external connection point condition, the length of each reel of optical cable Try to control it within 3~5Km. If the coil length is too long, it is inconvenient to construct; if it is too short, there will be more connections, and the loss 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 as 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 tractor is convenient to travel and whether the tension machine can be placed.
(3) Due to the error of the circuit design, the following empirical formula can be used for the distribution of the optical cable:
Optical cable coil length = transmission line length × coefficient + construction consideration length + welding length + line error;
Usually "coefficient" includes line sag, over-extraction length of poles and towers, etc. The length considered in construction is the length used for traction during construction.
(4) The distance between the hanging points of ADSS optical cables is generally not less than 7m. When determining the distribution, 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.) , And convenient for construction.