The advent of power cables has greatly improved the safety of power generation, transmission, transformation, supply, distribution, and use of electricity. Single-core power cables appeared first. As there are more and more occasions for three-phase four-wire power supply, three-phase five-wire power supply and multi-loop power supply in actual use, the requirements for occupied space and … Read more
According to incomplete statistics, there have been more than 100 major accidents caused by cable fires spreading across the country in the past ten years, and more than 320,000 meters of cables have been burned. The restoration and reconstruction work is expensive and time-consuming, and the loss of power supply alone amounts to more than … Read more
In our lives, electrical fire accidents caused by short circuits and spontaneous combustion caused by the aging of cables frequently occur, and the losses caused are countless. With the continuous acceleration of domestic economic construction and the heating of urbanization speed, the number of various large-scale industrial facilities, high-rise commercial buildings, underground buildings and residential … Read more
Requirements of General rubber plastic wire: 1. Scope of application: connection and internal installation of power, lighting, electrical equipment, instrumentation and telecommunication equipment with AC rated voltage of 450/750V low voltage cable and below. 2. Laying occasions and methods: indoor open laying and communication channels, along the wall or overhead laying in tunnels; outdoor overhead … Read more
In the new century, the importance of the ecological environment has become increasingly prominent, and environmental protection has gradually become the focus of attention and the mainstream of international development. Countries, organizations, companies and individuals all over the world are actively seeking environmental protection methods, and the laws and regulations that are compatible with them … Read more
When the power cable passes through a certain load current, it will be heated. With the increase of the load current, the cable surface temperature will be higher. If it is not handled in time, the consequences can be imagined. For example: PVC cable, the core temperature of 70 degrees is considered as the upper … Read more
Cables, especially PVC insulated power cables, have been widely used in urban power grid reconstruction projects. However, due to the particularity of the cable, the installation, operation and maintenance of the cable have special requirements. Cable insulation resistance is reduced by damp or water intrusion, which is an important aspect of cable line operation accidents. … Read more
At present, many domestic high-temperature wire and cable enterprises have entered the foreign market, but compared with foreign domestic products, the competitiveness of China’s high-temperature wire and cable products needs to be improved, especially some enterprises act rashly without understanding the foreign industry standards, which leads to an embarrassing situation for the development of enterprises. … Read more
At present, there are some cables with better temperature characteristics in China, such as: 1. Rubber insulated cables: The long-term operating temperature of WYJHDP wire core for rubber insulated cables in the field shall not exceed -45 ~ 50℃. WYJHQ, a mobile rubber insulated cable used in the field, operates at -45 ~ 50℃. The … Read more
Generally speaking, wind fields are located in harsh environments with special climatic conditions, such as strong winds, strong ultraviolet rays, and air with high salinity. For this reason, the cable performance in wind power applications is undoubtedly higher than that in other applications. The moving parts in the fan further increase the importance of choosing … Read more