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About UsHongsheng Wire and Cable Co., Ltd. is a key enterprise in Zhejiang Province specializing in the production of wires and cables, integrating industry, commerce, trade, production, education, and research. Its main production, processes, and testing equipment are all designed and configured according to international standards.
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2021
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Briefly describe the function of the braiding layer in power cables
Power cables are wire products used to transmit electrical (magnetic) energy, information, and electromagnetic energy conversion. In a broad sense, wires and cables are also called cables. In a narrow sense, cables are insulated cables, which can be defined as a collection of components: one or more insulated cores, and each core may have a sheath, an overall protective layer, and an outer protective layer. Cables may or may not have additional uninsulated conductors.
Power cable Wire and cable products used for transmitting (electromagnetic) energy, information, and electromagnetic energy conversion. In a broad sense, wire and cable are also called cables. Narrowly defined, a cable is an insulated cable, which can be defined as a collection of components: one or more insulated cores, and each core may have a sheath, an overall protective layer, and an outer protective layer. A cable may or may not have additional conductors without insulation.
For example, special cables are equivalent to spacious ordinary wires and cables. They are a series of wire and cable products with unique structures and special properties. Ordinary special cables have some general characteristics, namely, relatively strict usage environments, high technical content, slightly smaller usage than ordinary wires and cables, and high added value.
Power cable It is mainly composed of three basic structural components: conductive core, insulation layer, and sheath layer. The protective layer outside the insulated core or cable core is called the protective layer of the cable (the protective layer outside the protective layer is called the outer protective layer). From the perspective of the wire and cable protective layer, braiding is one of the various protective layers or outer protective layers of the wire and cable. However, the role of the braided layer depends on the material used for the wire and cable braided layer and the different positions of the braided layer in the wire and cable structure. Today, we will introduce the role of braided layers of different materials in wire and cables:
I. The role of the fiber braided layer
For wires, the fiber fabric layer is a form of lightweight protective layer Power cable The main function is to protect the insulation from various light, heat, moisture, low temperature, acid and alkali gases, and other erosion and damage from external mechanical forces, and to ensure the safe operation of the wire. For cables, the fiber fabric layer is often located in the middle of the protective layer to improve the tear strength of the protective layer. For example, a reinforced sheath is made by adding a fiber braided layer such as cotton yarn or hemp to the middle of the rubber or plastic protective layer to improve the strength of the protective layer.
II. The role of the metal braided layer
The metal braided layer is mainly composed of copper braiding and steel wire braiding.
The main functions of the copper fabric layer are:
1. Shielding effect against electromagnetic interference (such as copper fabric control cables, etc.).
2. Eliminate Power cable The shielding effect of the surface potential, bundling power lines, and eliminating induced electricity such as the total shielding of high-voltage cables.
3. Under the shielding effect of safety protection, copper wires are braided outside the main core insulation, making good contact with the ground core or used as a grounding wire, which can promptly respond to leakage situations, such as shielded mining cables.
The main functions of steel wire braiding are: 1. Mechanical protection for ship power cables such as CF31 type. 2. Can withstand longitudinal tensile force for marine geological exploration magnetic measurement cables such as WC-GC and WCT. 3. Magnetic field shielding.
The above is a brief introduction to Power cable the role of braiding of different materials. Since the roles of braided layers of fibers, copper, and wires are very different, appropriate braided wire and cables should be selected according to the usage requirements.
Power cable
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