1. What kinds of wires and cables are commonly used according to their purposes? Answer: It can be divided into bare wire, insulated wire, heat-resistant wire, shielded wire, power cable, control cable, communication cable, radio frequency cable, etc.
2. What kinds of insulated wires are there? Answer: often the insulated wire has the following kinds: PVC insulated wire, PVC insulated flexible wire, nitrile soft PVC compounds insulation wire, rubber insulated wire, agricultural underground buried plastic insulation aluminum core wire, rubber insulation cotton textile soft wire, PVC insulated nylon sheathed wire, electric power and lighting soft PVC insulated wire and so on.
3. What occasions is the cable tray suitable for? Answer: the cable bridge is suitable for the general industrial and mining enterprises indoor and outdoor overhead laying power cables, control cables, can also be used for telecommunications, broadcasting and TELEVISION departments in the indoor and outdoor erection.
4. What are the cable accessories? Answer: Commonly used electrical accessories include cable terminal junction box, cable intermediate junction box, connection pipe and terminal, steel plate connection slot, cable tray, etc.
5. What is the cable intermediate joint? Answer: connect the cable and cable conductor, insulation shield layer and protective layer, in order to make the cable line connected device, known as the cable intermediate joint.
Application of wire and cable
1. Power system
Power system used in wire and cable products mainly include overhead bare wires, bus (bus), power cable, power cable (plastic cable, the paper (basic) they were replaced by plastic power cables, rubber sets of cables, overhead insulated cables), branch cable to partly replace bus (), electromagnetic wire, and power equipment with electrical wire and cable equipment, etc.
2. Information transmission system
The main wires and cables used in the information transmission system are telephone cable, TELEVISION cable, electronic cable, radio frequency cable, optical cable, data cable, electromagnetic cable, power communication or other composite cables.
3. Mechanical equipment, instrument and meter system
This part except bare overhead wire almost all other products have applications, but mainly power cable, electromagnetic cable, data cable, instrument cable and so on.
Wire and cable products are mainly divided into five categories
1. Bare wire and bare conductor products
The main features of this class of products are: pure conductor metal, no insulation and sheath layer, such as steel-cored aluminum strand wire, copper-aluminum busbar, electric locomotive wire; The processing technology is mainly pressure processing, such as melting, rolling, drawing, stranded/pressed stranded, etc. Products are mainly used in suburbs, rural areas, user lines, switch cabinets and so on.
2. Power cables
The main features of this class of products are: extruded (wound) outer conductor covering insulation layer, such as overhead insulated cables, or twisted several cores (corresponding to the phase, zero and ground wires of the power system), such as overhead insulated cables with more than two cores, or additional sheath layer, such as plastic/rubber sheathed wires and cables. The main technologies are drawing, stranding, insulation extruding (wrapping), cabling, armor, sheath extruding, etc. The different process combinations of various products are different to some degree.
The products are mainly used in the transmission of strong electric energy in the power lines of generation, distribution, transmission, transformation and power supply, with large current (tens to thousands of amps) and high voltage (220V to 500kV and above).
3. Wires and cables for electrical equipment
Such products, the main characteristics are: various specifications, application range, use voltage in 1 kv and below is more, to derive new products constantly, in the face of special occasions, such as fireproof cables, flame retardant cable, low smoke zero halogen/against termites, low smoke low halogen cable, mouse cable, oil/cold/heat resistance, abrasion resistance cable, medical/farm/mining cable, thin wire, etc.
4. Communication cable and optical fiber (brief introduction)
With the rapid development of the communication industry in the past twenty years, the products have also developed at an amazing speed. From the past simple telephone and telegraph cables to thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even combined communication cables.
The structure size of this kind of product is usually small and uniform, and the manufacturing precision is high.
5. Electromagnetic wire (winding wire)
Mainly used for all kinds of motors, instruments and meters.
A derivative/new product of wire and cable
The derivative/new products of wires and cables are 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, different application requirements, convenience of equipment and reducing equipment cost.
Use different materials such as flame retardant cable, low smoke halogen-free/low smoke halogen-free cable, termite proof, mouse proof cable, oil/cold/temperature resistant cable, etc.
Change product structure such as: fire-resistant cable, etc.
Improve the process requirements such as: medical cable;
Combined products such as OPGW, etc.
Easy to install and reduce equipment cost such as: prefabricated branch cable.