The shielding layer of the Electrical Control Cable has the following functions:
1. Because the current passing through the power cable is relatively large, a magnetic field will be generated around the current. In order not to affect other components, adding a shielding layer can shield this electromagnetic field in the cable.
2. It can play a certain role in grounding protection. If the cable core wire is damaged, the leaked current can flow along the shielding layer like a grounding grid, which plays a role in safety protection.
Wire products used to transmit electric (magnetic) energy, and information and realize electromagnetic energy conversion are collectively referred to as wires and cables. According to different purposes, wires and cables can be divided into five categories:
Bare wires: Products with only conductors and no insulation, such as steel-cored aluminum-stranded wires, aluminum-stranded wires, and copper-stranded wires. The products are mainly used in the suburbs, rural areas, user main lines, switch cabinets, etc.
Winding wire (electromagnetic wire): In the form of winding, the magnetic force line is cut in the magnetic field to induce a current, or the wire is passed through the current to generate a magnetic field. It is mainly used in various motors, instruments, meters, etc. Such as enameled wire.
Power cables: Cable products used to transmit and distribute high-power electric energy in the backbone lines of power systems, such as XLPE insulated power cables.
Communication cables and optical cables: cables, optical cables, etc. for the transmission of telephone, telegraph, television, radio, fax, data, and other telecommunication information.
Wires and cables for electrical equipment: Wires and cables are used to directly transmit electric energy from the power distribution point of the power system to the power connection lines of various electrical equipment and appliances. Such as control cables, cloth wires, etc.