The so-called copper stranded wire refers to a new type of composite conductor formed by a number of single-stranded wires twisted according to certain rules with low carbon steel as the core through copper-plated treatment. The copper strand can be used as a ground wire for electrical work, and is a flexible connection wire for power transmission and distribution, electrical equipment (such as transformers, electric furnaces), electronic and electrical equipment, and thyristor devices. Stranded copper wire is achieved by moving the stranded wire forward at the same speed while rotating the stranded single wire around the stranded bobbin at the same angular speed. Copper stranded wire can be divided into hard copper stranded wire and soft copper stranded wire, each has its own characteristics and uses.

 

Copper strand has the following characteristics:

 

1. Unique manufacturing process. In order to realize the combination of metallurgical molecules and long life, the material is manufactured by a special process.

 

2, soft structure, large surface volume, good heat dissipation effect. High temperature welding without residue, no corrosion phenomenon, thick surface copper layer (average thickness of 0.3mm or more), strong corrosion resistance, long service life and maintenance free.

 

3, better electrical performance. The skin effect principle, excellent conductivity and magnetic permeability, is conducive to the diffusion and transmission of electromagnetic fields.

 

4, safe and reliable. Use a special connector or use different chemical reaction heat release welding, the joint is strong, good stability.

 

5. Convenient and fast. Special heat treatment can form a soft state and reduce linear connection points.

 

6, wide use: bundle or pallet packaging, fewer connection points, convenient transportation.

 

Application of hard copper strand and soft copper strand:

 

(1) Hard copper stranded wire: hard copper stranded wire resistance is small conductive performance because its tensile strength is relatively strong, so it is often used for conductive and relatively high tension requirements, such as distribution wires and building conductors, as well as the power of the cable.

 

(2) Soft copper stranded wire: the most common wire we see is household appliances, it is also suitable for motors, as a conductor of power cables and communication equipment. The specifications of soft stranded copper wire are 15-7φ5, 12-7φ5, 9-7φ5, etc., taking 15-7φ5 as an example, 5 indicates a nominal diameter of 1.7mm steel wire, 7φ5 indicates the formation of 7 such steel wire, 15 indicates the formation of a bunch of reinforcement of 15 such steel wire.

 

(3) Hard copper strand is made of copper tensile cold processing, so the tensile strength is high, high hardness, on the basis of hard copper strand, soft copper strand through different heating time out is including residual combination, compared with hard copper strand is soft and elastic, can be bent according to.

 

Due to the different characteristics of hard copper wire and soft copper wire, they are used in different fields. Because of its strong tensile strength compared to the knot, the resistance is small and the conductive performance is good, so it is often used for conductive demand and the tension requirement is relatively high. Soft copper stranded wire is usually thinner than hard copper stranded wire, its electrical conductivity is particularly high, good toughness, is our commonly used household electrical conductor.