EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
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EVCOME EV charging stations for better life---Top EV charging stations manufacturers & suppliers in China.
This article compiled by the editor today classifies wire and cable products, which can help you better understand the meaning of specifications and models. 1. Bare copper wire Bare wire and bare conductor products refer to wires without insulation and sheath, mainly including bare single wires, bare stranded wires and profiles. Copper-aluminum single wire: including soft copper single wire, hard copper single wire, soft aluminum single wire, and hard aluminum single wire. It is mainly used as a semi-product of various wires and cables, and a small amount is used in the manufacture of communication wires and electrical appliances. Bare stranded wires: including hard copper stranded wires (TJ), hard aluminum stranded wires (LJ), aluminum alloy stranded wires (LHAJ), steel-cored aluminum stranded wires (LGJ) are mainly used to connect electrical equipment, electronic appliances or components, the above Stranded wire specifications range from 1.0-300mm2. Second, the power cable. Power cables are used to transmit and distribute high-power electric energy cable products on the main line of the power system, including 1~330KV and above voltage levels and various insulated power cables. According to the voltage level, power cables are divided into low-voltage cables, medium-voltage cables, high-voltage cables, etc., and according to the insulation conditions, they are divided into plastic insulated cables, rubber insulated cables, mineral insulated cables, etc. 3. Aerial insulated cables. Aerial cables are also common and are characterized by having no sheath. Many people have three misunderstandings about this cable, and the editor corrects it here. First of all, its conductor is not only aluminum, but also copper conductor (JKYJ.JKV), aluminum alloy (JKLHYJ), and now there are steel core aluminum stranded wire overhead cables (JKLGY). Second, it is not only a single core, the common ones are generally single cores, but it can also be twisted into bundles by several conductors. Third, the voltage level of overhead cables is 35KV and below, not 1KV and 10KV. Fourth, the control cable. The structure of this kind of cable is similar to that of a power cable. It is characterized by only copper cores and no aluminum core cables. Stand-alone control or unit equipment control of power stations, substations, mines, petrochemical enterprises, etc. In order to improve the anti-internal and external interference control ability of the signal cable, the measures of setting up the shielding layer are mainly adopted. Common models are KV.KYJV.KYJV22.KVV2.KVVP. Model meaning: K control cables, V polyvinyl chloride insulation, YJ cross-linked polyethylene insulation, V polyvinyl chloride sheath, P copper wire shielding. For the shielding layer, our common KVVP is copper wire shielding. If it is a copper tape shield, it is KVVP2. If it is aluminum-plastic composite tape shielding, it is KVVP3. For the shielding layer of different materials, they have their own characteristics and functions. In a future article, let's talk about this topic. 5. Wire wiring is mainly used in household and power distribution cabinets. Friends who open hardware stores are most familiar with it. It is often said that BV wires belong to wiring. Models include BV.BLV.BVR.RVV.RVVP.BVVB, etc... In the model representation of wires and cables, this B is often seen, and different places represent different meanings. Take BVVB as an example, the B at the beginning means wiring, which means the application classification of the cable, just like JK means overhead cable. K means control cable. The flat represented by the B end is an additional special requirement for the cable. The meaning of BVVB is copper core PVC insulated PVC sheathed flat cable. 6. Special cables. Special cables are cables with special functions, mainly including flame-retardant cables (ZR), low-smoke halogen-free cables (WDZ), fire-resistant cables (NH), explosion-proof cables (FB), rodent-proof cables, termite-proof cables (FS), Waterproof cable (ZS), etc. Flame retardant cable (ZR). Low-smoke halogen-free cables (WDZ): mainly suitable for important power and control systems. In the event of a fire on the line, the cable can only burn to a limited extent under the action of an external flame, with less smoke and less harmful gas (halogen) in the smoke. When the external flame disappears, the cable can also extinguish itself, so as to minimize the loss of fire to human body and property. Therefore, this cable is widely used in petrochemical, electric power, metallurgy, high-rise buildings and densely populated important places. Fire-resistant cables (NH): mainly suitable for particularly important power and control systems. In case of a fire on the line, the fire-resistant cable can withstand 750~800°C and high temperature for more than 90 minutes, ensuring safe power supply and gaining enough time for fire prevention and disaster reduction. New products are continuously derived on special occasions, including fire-resistant cables, flame-retardant cables, low-smoke halogen-free/low-smoke low-halogen cables, termite/mouse-proof cables, oil-resistant/cold-resistant/temperature-resistant/wear-resistant cables, radiation cross-linked cables, etc. . .
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