The products of wire and cable manufacturers can be divided into many types. For example, power cables and communication cables are commonly used, so what is the difference between them?
Among them, communication cable is used for short-distance audio communication and long-distance communication, and high-frequency carrier is used for digital communication and signal transmission. It consists of a cable center composed of several optical fibers and an external protective layer. It has the characteristics of large transmission capacity, long transmission distance, small attenuation, light weight, small volume, low cost and no electromagnetic interference, and is a promising communication medium in the market at present. It is widely used in the transmission of telephone, telegraph, fax files, TV broadcast programs, data and other electrical signals, and will become the main body of future communication networks.
Power cable is a cable used to transmit and distribute electric energy, which is often used in urban underground power grid, power station, internal power supply of industrial and mining enterprises and underwater transmission lines of rivers and oceans, and is used to transmit and distribute high-power electric energy of the main line of power system.
Products need to be drawn, twisted and processed before they can be completed. Let’s learn more about these processes.
First of all, the drawing process is actually a technology in metal pressure processing. Under the action of external force, the metal is forced to compress the cross-sectional area of the metal through the die and obtain the required cross-sectional area shape and size. The process can be divided into monofilament drawing and stranded drawing, which can improve the flexibility and integrity of wires and cables, make the two wires and cables integrated, and make more than two single wires intertwined in the specified direction. If coated, different materials need to be coated outside the conductor according to different performance requirements.
When forming cables, in order to ensure the formation of multi-core cables and reduce the shape of cables, they should generally be twisted into a circle. The mechanism of stranding is similar to that of conductor stranding, but due to the large pitch diameter of stranding, the untwisting method is mostly adopted.
When using wires and cables, we must pay attention to safety issues. What should we pay attention to when embedding?
Whether it is used overhead or buried, the quality of wires and cables should be checked first, which is also closely related to the conditions of storage space. It should be noted that wires cannot be stored in humid and direct sunlight. Must be in a dry, ventilated and moisture-proof space to ensure that the product quality is not damaged, in order to ensure construction safety and quality. The cable quality must meet the production requirements, and the construction users should also pay attention to the fact that the cable trench should also be kept dry to prevent the cable from being wet, which will lead to insulation degradation and short circuit, which will affect the normal work of power supply and information transmission.
As long as the storage of wire and cable products is within the normal range, the quality of overhead and buried cables will be better guaranteed.
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