Is the cable insulation the same as the protective layer? No, there's a difference
With the application of electricity, the demand for cables in daily life and production is increasing. As we all know, the cable is formed by insulating material of insulation layer, a protective effect to the cable and we, the protective layer of the cable, and protection, so, many people often confuse the insulating layer and protective layer of the cable to, even think that the insulation of the cable is the protective layer, but in fact, the insulation of the cable insulation layer, the protective layer of the cable is the protective layer. So, what's the difference between an insulating layer and a protective layer? Below, xiaobian with you to popularize the insulation layer and protective layer.
In addition to conductors, there are insulating and protective layers, shielding layers and sheath layers. Among them, the insulation layer insulates the conductor in the cable from the surrounding environment or adjacent conductors to ensure that the current or electromagnetic and light waves transmitted by the conductor core only travel along the conductor and do not flow to the outside world, and at the same time ensure the safety of external objects and people. (please click here to learn more cable technology, huge amounts of dry goods, waiting for you) cable insulation materials in general can be divided into plastic rubber insulation materials, insulation materials and they have their own characteristics and purposes, are: plastic insulated power cable, just as its name implies is the power cable insulation layer for extrusion plastic, commonly used plastic with polyvinyl chloride (PVC), polyethylene, crosslinked polyethylene (described.properties), among them, the crosslinking polyethylene with its excellent performance and mechanical properties are widely used in medium and high voltage cable's insulation; Rubber insulated power cable, as the name suggests, is made of rubber and a variety of compound agents, after processing made of cable, commonly used as insulation rubber materials for natural rubber - styrene - styrene rubber mixture, ethylene propylene rubber, butyl rubber, with soft and elastic, suitable for frequent movement, small bending radius advantages.
Cable protection layer is a protective covering layer applied outside the cable insulation layer in order to make the cable adapt to the requirements of various use environments. It is called cable protection layer (sheath). Cable protection layer of main function is to protect the cable insulation layer in the process of installation and operation, from mechanical damage and destruction of various environmental factors, such as water, sunlight, biology, such as fire, to maintain long-term stability of the electric cable performance, so the cable coating quality is good or not is directly related to the service life of the cable length. The cable protective layer can be divided into three categories: metal protective layer (including outer protective layer), rubber and plastic protective layer and combined protective layer. Among them, rubber and plastic protective layer and combined protective layer can play the role of waterproof, flame retardant and corrosion resistant. However, it should be noted that if the cable protection layer is too long, it will also generate heat in the process of use, and if people do not pay attention to it for a long time, it will cause fire. Therefore, the length of the cable protection layer should be moderate.
Well, the above is the difference between the cable insulation layer and the protective layer, and the cable protection layer is too long, I hope you can understand!