Electrical engineering knowledge: what are the high and low voltage complete sets of equipment?

Complete sets of high and low voltage equipment include: metal enclosed switchgear (switchgear), gas insulated switchgear (GIS), high and low voltage pre-installed substation, low voltage switchgear, switchboard, control box, switch box and other electrical equipment.

1, high-voltage complete sets of equipment according to their different functions and functions, can be divided into:

(1) components and their combinations: including circuit breakers, disconnectors, grounding switches, reclosers, disconnectors, load switches, contactors, fuses, load switch-fuse combination appliances, contactor-fuse (F-C) combination appliances, isolated load switches, fuse switches, open combination appliances, etc.

(2) Complete set of equipment: the above-mentioned components and their combinations are reasonably configured with other electrical products (such as transformers, current transformers, voltage transformers, capacitors, reactors, lightning arresters, buses, inlet and outlet bushings, cable terminals and secondary components, etc.). ) and organically combined in a metal closed shell, with a relatively complete use function. Such as metal enclosed switchgear (switchgear), gas insulated switchgear (GIS) and high/low voltage pre-installed substations.

2. Complete sets of low-voltage equipment include low-voltage switchgear, switchboard, control box, switch box and other electrical equipment.

Extended data

High-voltage 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, industrial and mining enterprises and other users). Not only can some power equipment or lines be put into or out of operation according to the operation needs of the power grid, but also the faulty parts can be quickly cut off from the power grid when the power equipment or lines fail, thus ensuring the normal operation of the fault-free parts in the power grid and the safety of equipment, operation and maintenance personnel.

High-voltage and low-voltage complete sets of equipment are widely used in power plant low-voltage system distribution, electrical transmission and automatic control equipment. As we all know, power generation itself consumes a lot of energy (referring to auxiliary power). According to statistics, the energy consumption of low-voltage electrical appliances accounts for more than half of the total energy consumption of power plants. In recent years, with the adoption of large complete sets of equipment and automatic control and regulation system, the use of low-voltage electrical appliances has greatly increased.

Therefore, high and low voltage complete sets of equipment are very important transmission and distribution equipment, and its safe and reliable operation is of great significance to the safe and effective operation of power system.

References:

Baidu encyclopedia-high-voltage complete equipment

References:

Baidu encyclopedia-low-voltage complete equipment