DC cable is a kind of electric wire widely used in industry and electric power industry, which is mainly used to transport direct current. DC is a stable current whose direction does not change with time. DC cables are mainly of the following types:
1. Extruded DC cable: It adopts polyethylene as the insulating medium, which has the advantages of sturdy and simple structure, convenient production and installation, etc. All the indexes are better than the rubber-impregnated solid cable, and the insulation layer is subjected to DC voltage, and the distribution of the electric field is distributed in a proportional manner to the volume resistivity.
2. DC cables for photovoltaic: cables for photovoltaic power stations can be divided into DC cables and AC cables according to the purpose and use of the environment, DC cables need to be moisture-proof, sunlight-proof, cold-resistant, heat-resistant, UV-resistant, and AC cables are required to meet the requirements of the general selection of power cables.
3. high-voltage DC cable: high-voltage DC cable will play an important role in the future power grid, with large capacity, long distance, high economic efficiency, high reliability and low environmental impact of the advantages of the cable.
4. aluminium alloy DC cables: aluminium alloy cables are lightweight and low-priced, but they are not suitable for underground cable power supply.
The application scenarios of DC cables mainly include the following aspects:
1. industrial field: DC cables are widely used in industrial fields, such as electronic equipment, mechanical equipment, medical equipment and so on.
2. Power industry: DC cables are widely used in the power industry, such as wind power grid, island power supply and cross-sea long-distance power transmission and other scenarios.
3. Transport: DC cables are also used in the transport industry, such as electric vehicles, subways, trains and so on.
4. Construction industry: DC cables are also used in the construction industry, such as lighting, air-conditioning, lifts and so on.
5. Communication industry: DC cables are also used in the communication industry, such as communication base stations, data centres, etc.
In short, DC cables are widely used in industry, electric power, transport, construction and communication industries, and their types and application scenarios are varied.