The role of low voltage power cable sealing layer
Yanggu CableThe occupancy structure is seriously unbalanced. Ordinary wire and cable products are in short supply, and good products are in short supply. At present, the research investment in Yanggu cable industry is insufficient, and the innovation ability is relatively weak. Yanggu cable compared with advanced foreign, still far apart. You should not only pay attention to Yanggu cable output and give up quality. Improving the quality of Yanggu cable will be the main direction of the cable industry in the future.
LV power cableThe closing layer is a component that prevents the electromagnetic field in the cable product from being isolated from the external electromagnetic field. The resistivity of the semiconductor sealing layer of low-voltage power cables is very low, and it is usually divided into a conductor sealing layer and an insulating sealing layer. The conductor sealing layer of the low-voltage power cable is covered on the conductor, so that the surface of the conductor is lubricated evenly, the influence of the empty ground at the interface between the conductor and the insulating layer on the electrical performance is removed, and the low-voltage power cable avoids the partial discharge layer between the conductor and the insulator.
LV power cableThe insulating sealing layer is wrapped on the insulating surface and has good contact with the closed insulating layer. The grounding potential is the same as that of the metal sealing layer. The low-voltage power cable removes the influence of the open ground between the insulating insulating layer and the grounding metal sealing layer on the electrical performance. Partial discharges between the insulating layer and the metal sealing layer can be avoided.
LV power cableAnother type of sealing layer is a metal sealing layer, usually made of copper tape and copper wire.LV power cableAs the braid density and number of layers increase, the sealing effect of the low-voltage power cable is enhanced to prevent the magnetic field generated by the current from affecting other components. The commonly used Yanggu cable sealing layer is generally metal closed, with low cost and good effect, which can meet the requirements of most customers,Medium Voltage Power CableThere will also be.
What are the main points of purchasing wires and cables? Let's take a look. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. Its quality directly affects the quality of the project and the safety of consumers' lives and property. There are many wire varieties on the market, and appropriate wires should be used according to their own power load.
What are the precautions for wires and cables? Let's take a look. Common cable faults: wire surface markings-according to national standards, the wire surface should have continuous markings of the manufacturer's name, product model and rated voltage. This helps to find the manufacturing plant in time when there is a problem during the use of the wire, and consumers should pay attention to this when buying the wire.
There are many kinds of wire and cable products for electrical equipment on the market, which are difficult for ordinary consumers to distinguish. So what are the main categories of wire and cable products? What are the product naming principles of wire and cable? The editor brings you a brief understanding of relevant content knowledge.
The wires and cables for electrical equipment are mainly used for internal or external connection of electrical equipment, low-voltage transmission lines and various electrical signal transmission lines. Generally speaking, except for power cables, communication cables and magnet wires, most insulated wires and cables are classified as wires and cables for electrical equipment.
Electrical equipment with wire and cable is a large class of wire and cable products, a wide range of applications, many varieties, many series, large output, process type complex. The rated voltage of wires and cables for electrical equipment is low, and the working voltage is 450/750v and below, which is not more than 0.6/1kv. The working voltage of signal and instrument cables is usually 300/500v and below. The ampacity of the cable is determined according to the requirements of the cable.
Low voltage power cable winter pay attention to matters? As the weather gets colder and colder, manufacturers of low-voltage power cables usually become more difficult, which brings inconvenience to construction. Here are some precautions for winter construction. Let us take a brief look.