Aluminum alloy cable (abbreviation: alloy cable) is different from the traditional copper core cable. This aluminum alloy cable uses high elongation aluminum alloy material. The pure aluminum is added with iron and other materials, and undergoes a compact stranding process and special Annealing treatment can “squeeze” the voids in the alloy aluminum to reduce the … Read more
In urban power grid renovation projects, cables, especially polyethylene insulated power cables, have been widely used. However, due to the particularity of the cable, there are special requirements for the installation, operation and maintenance of the cable. Moisture or water in the cable reduces the insulation resistance of the cable, which is a few important … Read more
Aerial Bundled Cable is an overhead cable and is commonly used for overhead distribution in place of traditional overhead distribution systems with bare conductors. (ABC) NFC 33-209 Standard cable is also a low-voltage cable that provides higher levels of safety and reliability, lower power losses, and ultimately system economy by reducing installation, maintenance, and operation … Read more
Cable waterproof structure type: For XLPE ACWU90 AC90 Cable, there are usually the following waterproof structures: 1. For single-core cables, wrap a semiconducting resistance hose on the insulation shield of the cable, wrap a common water blocking tape outside the metal shield, and then squeeze the outer sheath. The outer sheath material can be ordinary … Read more
The main types of products that are currently used for medium and low voltage cable accessories are heat shrinkable accessories, prefabricated accessories, and cold shrinkable accessories. They have the following characteristics: 1 Heat shrinkable accessories The material used is generally a blend of polyethylene, ethylene-vinyl acetate (EVA), and ethylene-propylene rubber. This kind of product mainly … Read more
Strengthen cable construction management. The following points should be done during cable construction: a. Strengthen the handover and acceptance. Before laying the cable, verify whether the type, specification, and quantity of the cable are consistent with the design drawings, and conduct insulation tests, and do not use unqualified cables; b. Strengthen the management of cable … Read more
Actively develop the ABC cable distribution network to meet the needs of load growth and urban construction (improvement of the city appearance and reduction of land occupation). In recent years, with the extensive use of cables in urban network construction and transformation, cable failures have gradually increased. It is an important task for electric power … Read more
The degree of crosslinking (hot extension) is unqualified If the degree of cross-linking does not meet the standard, the thermal-mechanical properties of the cable are unqualified and cannot meet the requirement of 90°C working temperature. The reasons for the unqualified cross-linking degree are the unqualified formula and the improper proportion of the compounding agent. The … Read more
The inspection of overheadcable is one of the basic contents of the operation and maintenance of overhead lines. Defects can be found in time through inspections so that preventive measures can be taken to ensure the safe operation of the line. Usually, line inspectors should do “nine inspections” when inspecting overhead lines. Check the pole … Read more
Commonly used plastics for wires and cables include polyethylene, cross-linked polyethylene, polyvinyl chloride, polypropylene, polyolefin, fluoroplastics, nylon, etc. Polyethylene is currently the most widely used and most used plastic. From the data in the table, it can be seen that polyethylene has low meson loss, high electrical resistivity, high breakdown field strength, good weather resistance, … Read more