High and low voltage complete equipment includes: metal enclosed switchgear (switch cabinet), gas insulated metal enclosed switchgear (GIS), and electrical equipment such as high-voltage/low-voltage prefabricated substations, low-voltage switchgear, distribution boards, control boxes, switch boxes, etc. 
1. High voltage complete equipment can be divided into: (1) components and their combinations, including circuit breakers, isolation switches, grounding switches, reclosers, disconnectors, load switches, contactors, fuses, as well as load switch fuse combination appliances, contactor fuse (F-C) combination appliances, isolation load switches, fuse type switches, open type combination appliances, etc., based on their functions and functions. (2) Complete equipment: the above components and their combinations are reasonably configured with other electrical products (such as transformers, current transformers, voltage transformers, capacitors, reactors, lightning arresters, buses, incoming and outgoing line bushings, cable terminals and secondary components), organically combined in a metal enclosed enclosure, and have relatively complete use functions. For example, metal enclosed switchgear (switch cabinets), gas insulated metal enclosed switchgear (GIS), and high-voltage/low-voltage prefabricated substations.
2. The low-voltage complete equipment includes low-voltage switchgear, distribution boards, control boxes, switch boxes, and other electrical equipment. Expanded information: High and low voltage complete sets of equipment are mainly used for the control and protection of power systems (including power plants, substations, transmission and distribution lines, and industrial and mining enterprises and other users). They can not only put some power equipment or lines into or out of operation according to the needs of power grid operation, but also quickly cut off the faulty part from the power grid in case of power equipment or line failure, thereby ensuring the normal operation and equipment of the faultless part in the power grid Safety of operation and maintenance personnel. High and low voltage complete sets of equipment are widely used in the distribution, electrical transmission, and automatic control equipment of low-voltage systems in power plants. As is well known, power generation itself consumes a lot of energy (referring to factory electricity), and according to statistics, low-voltage electrical appliances account for more than half of the total energy consumption of power plants. In recent years, with the adoption of large-scale complete equipment and automatic control and regulation systems, the use of low-voltage electrical appliances has increased significantly. Therefore, high and low voltage complete sets of equipment are very important transmission and distribution equipment, and their safe and reliable operation is of great significance for the safe and effective operation of the power system.