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Classification and application of wire and cable

by:AAA     2020-02-25
1. What kinds of commonly used wires and cables are classified according to their uses? Answer: According to the purpose, it can be divided into bare wires, insulated wires, heat-resistant wires, shielded wires, power cables, control cables, communication cables, radio frequency cables, etc. 2. What kinds of insulated wires are there? Answer: There are many kinds of insulated wires: PVC insulated wire, PVC insulated flexible wire, nitrile PVC mixed insulated flexible wire, rubber insulated wire, agricultural underground buried aluminum core plastic insulated wire, rubber insulated cotton textile flexible wire, PVC insulated nylon sheathed wire, Power and Lighting PVC insulated flexible wires, etc. 3. What kind of occasion is the cable bridge suitable? Answer: cable bridge is suitable for indoor and outdoor overhead laying of power cables and control cables in general industrial and mining enterprises, and can also be used for indoor and outdoor erection in telecommunications, radio and television departments. 4. What are the cable accessories? Answer: Common Electrical accessories include cable terminal junction box, cable Intermediate junction box, connecting pipe and terminal block, steel plate wiring slot, Cable Bridge, etc. 5. What is the cable intermediate connector? Answer: The device connecting the cable and the cable conductor, insulation shielding layer and protective layer to connect the cable line is called the cable intermediate joint. Wire and Cable Application 1. Power system, wire and cable products used in power system mainly include overhead bare wires and bus bars (Busbar), Power cable (Plastic cable, oil-paper power cable (Basically replaced by plastic power cables)Rubber sheathed cable, overhead insulated cable), Branch cable (Replace part of the bus) , Electromagnetic wire and electric equipment wire and cable for power equipment, etc. 2. Information transmission system, wires and Cables used in information transmission system mainly include local telephone cables, TV cables, electronic cables, radio frequency cables, optical fiber cables, data cables, electromagnetic wires, power communication or other composite cables, etc. 3. Mechanical equipment, instrumentation system this part has almost all other products except overhead bare wires, but mainly power cables, electromagnetic wires, data cables, instrumentation cables, etc. Wire and cable products are mainly divided into five categories 1. Bare wires and bare conductor products. The main features of this kind of products are: pure conductor metal, no insulation and sheath layer, such as steel core aluminum stranded wire, copper-aluminum bus bar, electric locomotive line, etc; The processing technology is mainly pressure processing, such as smelting, calendering, drawing, stranding/pressing stranding, etc; The products are mainly used in suburban, rural, user Main Line, switch cabinet, etc. 2. Power cables, the main features of this type of products are: squeezing outside the conductor (Winding) Wrapped insulation layer, such as overhead insulated cable, or several cores stranded (Corresponding to the phase line, zero line and ground line of the power system) , Such as overhead insulated cables with more than two cores, or adding sheath layers, such as plastic/rubber sheathed wires and cables. The main technology includes drawing, twisting, insulation extrusion (Wrap around) , Cable, armor, sheath extrusion, etc. , different process combinations of various products have certain differences. The products are mainly used in the transmission of strong electric energy in power generation, distribution, transmission, transformation and power supply lines, with large current (Tens to thousands of Ann), High voltage (220V to 500kV and above). 3, electrical equipment with wire and cable, the main features of this kind of products are: a wide range of specifications, a wide range of applications, the use of voltage in 1kV and below more, in the face of special occasions constantly derived new products, such as fire-resistant cables, flame-retardant cables, low-smoke halogen-free/low-smoke halogen-free cables, termite-proof cables, mouse-proof cables, oil-resistant/cold-resistant/temperature-resistant/wear-resistant cables, medical/agricultural/mining cables, thin-walled wires, etc. 4. Communication cable and optical fiber (Brief introduction) With the rapid development of the communication industry in the past 20 years, the products have also developed at an amazing speed. From the simple telephone and telegraph cable in the past to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even combined communication cables. The structure and size of such products are usually small and uniform, and the manufacturing accuracy is required to be high. 5, electromagnetic wire ( Winding wire is mainly used for various motors, instruments and meters, etc. Derivatives of Electric Wires and Cables/new products derivatives of Electric Wires and Cables/new products are mainly due to the requirements of different application occasions, application requirements, convenience of equipment, reduction of equipment cost, etc, it is produced by adopting new materials and special materials, or changing product structure, or improving technological requirements, or combining products of different varieties. Adopt different materials such as flame retardant cable, low smoke halogen-free/low smoke halogen cable, anti-termite, anti-mouse cable, oil-resistant/cold-resistant/temperature-resistant cable and so on; Change the product structure such as fire-resistant cables, etc; Improve technological requirements such as medical cables, etc; Combination products such as: OPGW, etc; It is convenient to install and reduce equipment costs such as prefabricated branch cables.
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