In ancient times, there was no electricity, social progress was slow, and people worked inefficiently. For modern people, the invention of electricity has brought enormous benefits to human beings, making our lives rich and colorful, convenient and fast, and driving countless industries. Wire and cable as an important means of transmission of electrical energy is an indispensable part. Wire and cable can be divided into the following five categories according to the purpose.
1. Bare wire and bare conductor products
Its main features are: pure conductor metal, no insulation and sheath layer, such as steel core aluminum stranded wire, copper-aluminum busbar, electric locomotive line, etc.; processing technology is mainly pressure processing, such as melting, calendering, drawing, twisting Combined/tightening, etc.; products are mainly used in suburbs, rural areas, user main lines, switch cabinets, etc.
2, power cable
Its main features are: extrusion (winding) the outer insulation of the conductor, such as overhead insulated cable, or stranding (corresponding to the phase, neutral and ground of the power system). For example, an overhead insulated cable with two cores or more, or a sheath layer, such as a plastic/rubber cable. The main process technologies are drawing, stranding, insulation extrusion (winding), cable-forming, armoring, and sheath extrusion. The different process combinations of various products are different. The products are mainly used for transmission of strong electric energy in the transmission, distribution, transmission, transformation and power supply lines. The current passing through is large (tens of amps to several thousand amps) and the voltage is high (220V to 500kV and above).
3. Wire and cable for electrical equipment
Its main features are: variety specifications, a wide range of applications, the use of voltage is more than 1kV and below, in the face of special occasions continue to derive new product categories, such as fire-resistant electrical cables, flame-retardant electric cables, low smoke Halogen cables, termite prevention, mouse-proof cables, oil-resistant, cold-resistant and temperature-resistant cables, medical agricultural power cables, thin-walled wires, etc.
Wire and cable for electrical equipment
4, communication cable and fiber optic cable
Its main features are: wire and cable products for transmitting various telecommunication information above audio and audio, including local telephone cables, long-distance symmetric communication cables, coaxial communication cables, telephone equipment cables, and various communication lines. The main material is quartz and plastic as the substrate to transmit information by light, which has the advantages of large capacity, small size and light weight.
Communication wire and cable
5, the winding wire
Its main features are: the winding wire is used to cut the magnetic flux in the magnetic field to induce the current, or the wire used to generate the magnetic field by the current is called the winding wire, which includes the enameled wire with various characteristics, the fiber wrapped wire, the inorganic insulated wire and the like.