上架空线路施工
Stringing of aerial cables for electrical networks is an important step in the construction of the power system. The stringing involves the installation of poles and towers to anchor the cables, and it is done to ensure that the cables are properly supported and adequately protected.
The stringing of aerial cables requires careful planning and preparation, which starts by clearly defining the path of the cable. The route of the cable must be designed so that it is clear of obstructions and other physical hazards that may interfere with the operation of the cable once it is installed. Special attention must be paid to areas that might be prone to falling trees or other potential hazards.
After the route of the cable has been identified, the next important step is to design the geometries of the stringing. This includes deciding the number of strandings for each section of the cable and the corresponding dimensions of the arches or loops in which the cables will be kept under tension. It is important to ensure that the stringing follows regulations of the governmental department responsible for energy supply.
To begin stringing the aerial cable, all necessary components are assembled at the location of the first supporting structure. The components typically include conductor cable, tensioners, clamps, and tethering insulators. The conductors should be lubricated to reduce friction along the cable path. The tensioners are installed so that the cables are held in a safely tensioned state during the stringing process. Tethering insulators, on the other hand, ensure that the conductors and the towers dont get too close to each other and create a potential hazard.
The next step is to attach the cables, using appropriate clamps, to the tensioners and to the terminals of the first supporting structure. The cables are then drawn out, using tuggers, and attached, using clamps and insulators, to the next supporting structure. This process is repeated until the end of the cable has been reached. In addition, special care must be taken to ensure that the newly installed sections of cable dont interfere with existing ones.
Once the cables have been stringed, they must be tested and protected. This includes carrying out tests on the insulation and electrical properties of the aerial cable and carrying out preventive maintenance activities such as vegetation control along the cable route. Furthermore, the cable must be connected to the overhead ground wire conductor, which is installed to reduce the risk of electrocution.
The stringing of aerial cables is a complex task that requires specialized personnel and careful attention to detail. It is important to employ experienced and qualified workers to perform the job and to ensure that the work is done in accordance with the regulations of the governmental department responsible for energy supply. Failure to do so could lead to operational problems, safety issues, and financial losses.
