1. What are the types of commonly used wires and cables according to their uses? Answer: According to their uses, they can be divided into bare wires, insulated wires, heat-resistant wires, shielded wires, power cables, control cables, communication cables, radio frequency cables, etc. Answer: The common insulated wires are the following: PVC insulated wires, PVC insulated flexible wires, nitrile PVC mixture insulated flexible wires, rubber insulated wires, agricultural direct buried aluminum core plastic insulated wires, rubber insulated cotton yarn textile flexible wires, PVC insulated nylon sheathed wires, PVC insulated flexible wires for power and lighting, etc. Answer: cable tray is suitable for general industrial and mining enterprises indoor and outdoor overhead laying power cable, control cable, can also be used for telecommunications, radio and television and other departments in the indoor and outdoor erection. Answer: Commonly used electrical accessories include cable terminal junction box, cable intermediate junction box, connecting pipe and terminal, steel plate connection slot, cable tray, etc.
5. What is the middle cable joint? Answer: The device that connects the cable and the conductor, insulation shield and protective layer of the cable to connect the cable line is called the middle cable joint.
Wire and cable application
1, power system
The wire and cable products used in the power system mainly include overhead bare wires, bus bars (bus bars), power cables (plastic cables, oil-paper cables (basically replaced by plastic power cables), rubber-sheathed cables, overhead insulated cables), branch cables (replacing some bus bars), electromagnetic wires and electrical equipment wires and cables for power equipment wait.
2, Information Transmission System
The wires and cables used in the information transmission system mainly include local telephone cables, TV cables, electronic cables, radio frequency cables, optical fiber cables, data cables, electromagnetic cables, power communication or other composite cables, etc.
3, mechanical equipment, instrumentation system
This part has applications in almost all 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 wire and bare conductor products
The main characteristics of this category of products are: pure conductor metal, no insulation and sheath layer, such as steel core aluminum stranded wire, copper aluminum bus bar, electric locomotive wire, etc. The processing technology is mainly pressure processing, such as melting, rolling, drawing, stranding/stranding, etc; products are mainly used in the suburbs, rural areas, users of the main line, switch cabinets and so on.
2, power cable
The main features of this type of products are: extruding (winding) an insulating layer outside the conductor, such as overhead insulated cables, or twisting several cores (corresponding to the phase, neutral and ground wires of the power system), such as overhead insulated cables with more than two cores, or adding a sheathed layer, such as plastic/rubber sheathed wires and cables. The main process technologies include drawing, stranding, insulation extrusion (wrapping), cable formation, armor, sheath extrusion, etc. The different process combinations of various products have certain differences.
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 of amperes to thousands of amperes) and high voltage (220V to 500kV and above).
3. Wire and cable for electrical equipment
The main characteristics of this type of product are: a wide range of varieties and specifications, a wide range of applications, a large number of voltages of 1kV and below, and continuous derivation of new products in the face of special occasions, such as fire-resistant cables, flame-retardant cables, low-smoke halogen-free/low-smoke low-halogen cables, termite-proof, 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 two decades, the products also have amazing development speed. From the past simple telephone and telegraph cables to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even combination communication cables.
This type of product structure is usually small and uniform in size, and requires high manufacturing accuracy.
5, electromagnetic wire (winding wire
is mainly used for various motors, instruments, etc. Derivative/New Product of
Wire and Cable The derivative/new product of
wire and cable is mainly produced by adopting new materials, special materials, changing product structure, improving process requirements, or combining different kinds of products due to different application occasions, application requirements, convenience of equipment and reducing equipment cost.
adopts different materials such as flame-retardant cables, low-smoke halogen-free/low-smoke low-halogen cables, termite-proof cables, mouse-proof cables, oil-resistant/cold-resistant/temperature-resistant cables, etc.
Change product structure such as fire-resistant cables, etc.
Improve process requirements such as medical cables, etc.
Combined products such as OPGW, etc.
Easy to install and reduce equipment costs such as prefabricated branch cables.
