The copper wire braided shield of the cable requires a coverage density greater than 90%, and the braided wire diameter should be greater than 0.1mm.
The copper wire braided shield of the cable requires a coverage density greater than 90%, and the braided wire diameter should be greater than 0.1mm.
For all special cables with a shielding layer, the diameter of the group shielding drain wire should be greater than 0.4mm; the total shielding drain wire diameter should be greater than 0.6mm.
The allowable bending radius of unarmored cables shall not be less than 6 times the outer diameter of the cable, and the allowable bending radius of armored cables shall not be less than 12 times the outer diameter of the cable.
The purpose of shielded wires and cables: Suitable for various AC and DC rated voltages of 450/750V and 0.6/1KV, various electrical appliances, instruments, telecommunications, computer network control systems, power equipment and automation devices that require anti-interference.
The braided layer is a tight protective layer formed by twisting the material into metal wires with a certain pattern and covering it on the surface of the wires and cables. It is also called a shielding layer (the typical structure of the cable is shown in Figure 1). The main function of the braided layer is to prevent electromagnetic interference, eliminate the surface potential of the wire and provide safety protection.
The braiding density (coverage) and braiding angle are usually used to evaluate whether the braiding process meets the quality requirements. The braiding density is the ratio of the surface covered by the braided wire to the entire braided wire surface.
When the ratio is 1, the braided layer has no gaps; when the ratio is <1, the braided layer will have braided gaps. The smaller the ratio, the wider the gap. The angle between the longitudinal axis of the wire and the braided wire is called the braiding angle, and the braiding angle is also closely related to the gap of the braiding density.