1. Cable handling and storage
In the initial stage of High Voltage Cable installation, cable handling and storage are crucial. First of all, the cable should be prevented from excessive bending, squeezing and dragging during handling. For long-length and large-diameter High Voltage Cable, special cable reels and lifting equipment are required to ensure that the cable reels remain horizontal and stable during lifting and transportation. The rolling direction of the cable reel should be consistent with the winding direction of the cable to prevent the cable from loosening and twisting on the reel. In terms of storage, a dry, well-ventilated and flat site should be selected to avoid direct contact between the cable and the ground or water accumulation to prevent the cable from being damp and corroded. When storing, attention should also be paid to the stacking height of the cable to prevent the lower layer of cable from being deformed and damaged due to excessive pressure.
2. Precautions during cable laying
When laying cables, the laying tension must be strictly controlled. Excessive tension may stretch the cable, causing changes in the internal structure of the cable, such as deformation of the conductor and damage to the insulation layer. Tension monitoring equipment can be used to monitor the laying tension in real time to ensure that it is within the specified safety range. At the same time, avoid excessive bending of the cable and lay it according to the minimum bending radius requirements provided by the cable manufacturer. A bend or pulley with a sufficient radius should be set at the bend to guide the cable to transition smoothly. In addition, during the laying process, it is strictly forbidden for the cable to contact with sharp objects, such as rocks, metal corners, etc., to prevent scratching the outer sheath or insulation layer of the cable.
3. Standard operation of cable joint production
Cable joint production is a key link in the installation of High Voltage Cable. Construction personnel should have professional skills and qualifications and strictly follow standard operating procedures to make joints. Before making the joint, the cable end should be cleaned to remove impurities such as oil and dust on the surface. When cutting the cable, ensure that the cut is neat and smooth to avoid burrs. When connecting the conductor, ensure that the connection is tight and reliable, and the conductor resistance after connection must meet the specified standards. For the insulation treatment of the joint, use appropriate insulating materials, wrap and seal according to the specified process to prevent moisture, air, etc. from entering the joint and affecting the insulation performance.
4. Inspection and protection after construction
After the cable installation construction is completed, a comprehensive inspection should be carried out. Use insulation resistance testers, voltage testers and other equipment to test the electrical performance of the cable to ensure that the cable's insulation resistance, voltage resistance and other indicators meet the requirements. At the same time, check the cable laying path to see if the cable is firmly fixed and the markings are clear. Before the cable is put into operation, it is also necessary to protect the cable. Set up warning signs around the cable to prevent damage to the cable during other construction projects. If the cable is located underground, ensure the quality of the backfill soil to avoid stones and other hard objects from squeezing the cable.
