Steel-cored aluminum stranded wire, ACSR, refers to a single-layer or multi-layered aluminum stranded wire reinforced with a galvanized steel core wire. Mainly used in power and transmission line industries.
Steel core aluminum stranded wire is made by twisting aluminum wire and steel wire, which is suitable for overhead power transmission lines. It is a steel “core” inside and an aluminum wire wrapped around the steel core by twisting; the steel core mainly plays the role of increasing strength, and the aluminum stranded wire mainly plays the role of transmitting electrical energy;
The types of steel core aluminum stranded wire are divided into: JL / G1A JL / G1B JL / G2A JL / G2B JL / G3A Among them: G1A or G1B refers to ordinary strength steel wire. G2A or G2B refers to high-strength steel wire. G3A refers to extra high strength steel wire. Model difference: Take JL / G1A-240 / 30 steel core aluminum stranded wire as an example.
Steel core aluminum stranded wire has simple structure, convenient installation and maintenance, low line cost, large transmission capacity, and is conducive to laying across special geographical conditions such as rivers and valleys. It has good electrical conductivity and sufficient mechanical strength and large tensile strength. , Tower pole distance can be enlarged and so on. Therefore, it is widely used in overhead transmission and distribution lines of various voltage levels.
For high-voltage transmission lines, due to the limited path of the line, it is not possible to mount multiple lines on one path. People have come up with a path, a set of towers, and multiple wires, that is, one line is equivalent to multiple lines Line method; for 500KV transmission lines, some use four wires, this way of wiring is called parallel tower.