Copper stranded wire refers to a new type of composite wire composed of low-carbon steel as the core, processed by copper plating, and twisted according to certain rules. Copper stranded wire is a flexible connecting wire for power transmission and distribution, electrical devices (such as transformers, electric furnaces), electronic and electrical equipment, and thyristor components. In addition, stranded copper wire can also be used for electrical work ground wire. The copper stranded wire is realized by the stranded single wire wound around the stranded wire shaft at the same angular speed and the stranded wire moving at a constant speed. Copper stranded wire can be divided into two types: hard copper stranded wire and soft copper stranded wire. They each have their own characteristics and uses.
1. Military covered wire conductors; power industry ground rods; woven shielded wires for power cables; connectors for various electronic components; reinforced conductive cores for special cables; overhead wires for power transmission and telephone lines; parallel dual-core telephone users Conductors of communication lines; load-bearing cables and trolley lines of electrified railways and track traffic lines; inner conductor materials of coaxial cables for cable TV subscriber lines and household access lines; inner conductors of computer local area networks, access network cables, and outdoor cables.
2. Application fields of hard copper stranded wire and soft copper stranded wire:
(1) Hard copper stranded wire: Hard copper stranded wire is often used in places where electrical conductivity is required and the tension is relatively high because of its stronger tensile strength and better conductivity, such as power distribution lines and buildings. conductors, as well as cables for power transmission.
(2) Soft copper stranded wire: what we often see is the wire of household electrical appliances, it is also suitable for electrical machinery, as the conductor of power cables and communication equipment. Soft copper stranded wire specifications are 15-7Φ5, 12-7Φ5, 9-7Φ5, etc. Take 15-7Φ5 as an example, 5 indicates a steel wire with a nominal diameter of 5.0mm, 7Φ5 indicates that 7 such steel wires form a steel strand, and 15 indicates that 15 such steel strands form a bundle of steel bars, and the general meaning is "a bundle of steel bars consisting of 15 7-wire (total diameter 5mm, each wire diameter is about 1.7mm) steel strands".