In modern society, cable plays an indispensable role as an important tool for power transmission and information transmission. Among them, high-voltage cable and low-voltage cable as two common types of cable, they have obvious differences in structure, application scenarios and voltage. This article will discuss the difference between high voltage cable and low voltage cable, and show the application field of both by example.

First, structural differences

High voltage cables are usually composed of multiple layers of insulating and conductive materials, including conductors, insulation layers, shielding layers and jackets. Conductors are the main body of electrical energy transmission, generally made of copper or aluminum, which can withstand higher voltages. The insulation layer acts as a barrier between the conductor and the external environment to prevent current leakage and loss. The shielding layer is used to reduce electromagnetic interference and improve the signal transmission quality of the cable. The sheath protects the entire cable, enhancing its wear resistance and resistance to external environmental factors.

Low-voltage cables are relatively simple and generally consist of conductors, insulating layers and sheathing. Compared with high-voltage cables, the conductors of low-voltage cables are usually made of copper or aluminum, but the cross-sectional area of the conductors is smaller. The function of the insulation layer is similar to that of the high-voltage cable, which plays an isolating role and prevents the leakage of current. The sheath is used to protect the cable, improving its wear resistance and resistance to external environmental factors.

Two, voltage level

Low-voltage cables are mainly used to transmit electric energy below 1kv, and high-voltage cables refer to cables with rated voltage greater than 35kV, which are mainly used for power grid transmission. Low voltage cable is suitable for electrical connection, indoor lighting and other fields.

3. Production process

The manufacture of low-voltage cables can use ordinary polyvinyl chloride and cross-linked polyethylene, which have the difference between cross-linked and ordinary. Medium and high voltage cables can only be made of crosslinked cables. In 6kv to 35kv cables, the production process of three-layer co-extrusion and high density crosslinked polyethylene is often used. The insulation thickness of low-voltage and high-voltage cables is also different.

For example:

Take the home wire as an example, it is a typical low-voltage cable. The conductors of household wires are generally made of copper, which has good electrical and thermal conductivity and can safely transmit low-voltage electrical energy. The insulation layer uses polyvinyl chloride (PVC), XLPE and other materials to effectively isolate the conductor and the external environment, reducing the risk of current leakage. The sheath of the home wire is generally made of PVC material, which has good wear resistance and fire resistance.

High-voltage cables are mainly used in power transmission and industrial fields. For example, in transmission lines, high-voltage cables can withstand higher voltages and currents to ensure the stability of power transmission over long distances. In addition, in the industrial field, high-voltage cables are often used in motor drive, inverter control and other scenarios to support the operation of high-power equipment.

By comparing the structure and application fields of high voltage cable and low voltage cable, it can be concluded that there are obvious differences in voltage, structure and application. In practical applications, it is very important to choose the right type of cable to ensure the safety and reliability of power transmission and information transmission.

There are obvious differences between high-voltage cables and low-voltage cables in terms of structure and application. Understanding their characteristics and application scenarios can help us better choose and use cables in actual life and work to ensure the operation of power transmission and information transmission. At the same time, in the process of using the cable, we should pay attention to safety issues, avoid circuit short circuit and cable damage, and ensure the safety of people and property.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable.