In addition to the differences in function, installation environment, internal structure and controlled objects, high-voltage distribution boxes and high-voltage switch cabinets also have different external dimensions, small volume, and the characteristics of being hidden in the wall and standing on the ground. High-voltage switchgear is relatively large in size and can only be installed in substations and distribution rooms.
High-voltage switchgear is a kind of electrical equipment. The external lines of the switch cabinet first enter the main control switch inside the cabinet and then enter the secondary control switch. Each branch circuit is set up as needed. For instance, there are instruments, automatic control systems, electric motors, electromagnetic switches, various AC contactors, etc. Some are also equipped with high-voltage and low-voltage switch cabinets, power plants with high-voltage busbars, etc. Some are also equipped with low-frequency load removal to ensure the main equipment.
The main function of high-voltage switchgear is to turn on and off, control and protect electrical equipment during the processes of power generation, transmission, distribution and power conversion. The components in a switch cabinet mainly consist of circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices. There are many classification methods for switch cabinets, such as movable switch cabinets and fixed switch cabinets installed by circuit breakers. Or, depending on the different cabinet structures, open the switch cabinet, metal-enclosed switch cabinet and metal-enclosed armored switch cabinet. High-voltage switchgear, medium-voltage switchgear and low-voltage switchgear can be classified according to different voltage levels. It is mainly used in various occasions such as power plants, substations, petrochemicals, metallurgical rolling, light industry and textiles, factories and mining enterprises, residential areas, high-rise buildings, etc.
High-voltage distribution cabinets, distribution cabinets (distribution boxes), distribution boxes (distribution boxes) and distribution equipment (distribution boxes). The distribution cabinet is the general term for the motor control center. Distribution cabinets are used in situations where the load is dispersed and there are few circuits. The motor control center is used in situations where the load is concentrated and there are many circuits. They distribute the electrical energy of the circuits of the upper distribution equipment to the nearby loads. This equipment should provide protection, monitoring and control of the load.
High-voltage distribution cabinets, lighting distribution cabinets, metering cabinets and other final equipment in the power distribution system.