High voltage central cabinet VS traditional switch cabinet performance comparison
Publish Time: 2025-03-13
Among the key equipment of the power system, high voltage central cabinet and traditional switch cabinet each play an important role. With the advancement of technology and the continuous improvement of power grid demand, the performance difference between the two is becoming increasingly significant.1. Structural characteristicsHigh voltage central cabinet, the full name is armored removable central metal enclosed switchgear, its unique structure is divided into three layers: the upper layer is the busbar and instrument room (isolated from each other), the middle layer is the circuit breaker room, and the lower layer is the cable room. This layered design not only improves the space utilization of the equipment, but also makes each functional area independent of each other, which is convenient for maintenance and overhaul. In addition, the central cabinet usually adopts a metal enclosed structure with good protection level and safety.Traditional switch cabinets have various structures, including fixed and removable types. Fixed switch cabinets such as GG-1A have a relatively simple structure, mainly composed of load switches, transformers and other components, connected into a system through copper bars. The removable switch cabinet has a more flexible structure, which is convenient for the replacement and overhaul of components such as circuit breakers. However, compared with high voltage central cabinet, traditional switch cabinet may be slightly inferior in terms of compactness and space utilization.2. Heat dissipation performanceHigh voltage central cabinet performs well in heat dissipation. It usually adopts a combination of multiple heat dissipation methods, including air cooling, natural heat dissipation and heat pipe heat dissipation. Air cooling draws outside air into the cabinet by installing a cooling fan, allowing the air to flow through the surface of the electrical components and take away the heat. Natural heat dissipation relies on the metal material and good thermal conductivity of the cabinet itself to transfer heat to the external environment. Heat pipe heat dissipation is an efficient heat transfer element that can quickly transfer the heat generated by the electrical components to structures such as heat dissipation fins and dissipate it into the air.Traditional switch cabinets also have heat dissipation functions, but the heat dissipation methods may be relatively single. For example, the common GGD type low-voltage switch cabinet achieves air cooling through vents and fans on the cabinet door or side panels. However, when running at high load, the heat dissipation effect of traditional switch cabinets may not be as significant as that of high voltage central cabinet, especially in terms of heat dissipation area utilization efficiency and heat dissipation method diversity.3. Power distribution functionHigh voltage central cabinet is mainly used for high voltage load protection, such as protecting the rear transformer or other high voltage load. It has excellent mechanical performance and safety and reliability, and can operate stably in harsh power environment. In addition, the central cabinet also has the control, protection, monitoring and measurement functions of the power circuit, which provides a strong guarantee for the stable operation of the power system.Traditional switch cabinet is mainly used for the distribution of high voltage power supply, dividing one or two high voltage power supplies into multiple high voltage power supply outlets. It plays an important role in switching, controlling and protecting in the power generation, transmission, distribution and power conversion of the power system. However, in terms of the diversity and flexibility of power distribution functions, traditional switch cabinets may not be as rich as high voltage central cabinet.4. Application scenariosHigh voltage central cabinet has been widely used in power plants, power system secondary substations, power distribution of industrial and mining enterprises and institutions, and starting of large high voltage motors due to its excellent performance and reliability. Especially in occasions with high requirements for equipment space utilization, safety and reliability, high voltage central cabinet has more advantages.Traditional switchgear is suitable for various power system scenarios, including substations, petrochemicals, metallurgy and steel rolling, light industry and textiles, as well as residential areas and high-rise buildings. It plays an important role in all aspects of the power system, but may need to be customized and optimized according to specific application scenarios.In summary, there are significant differences between high voltage central cabinet and traditional switchgear in terms of structural characteristics, heat dissipation performance, power distribution functions and application scenarios. High voltage central cabinet has unique advantages in the power system with its compact structure, efficient heat dissipation performance, rich power distribution functions and a wide range of application scenarios. Traditional switchgear plays an irreplaceable role in all aspects of the power system with its flexibility and applicability.
