12kV/4000A high-current gas-insulated metal-enclosed switchgear

Abstract

A 12kV / 4000A high-current gas-insulated metal-enclosed switchgear overcomes the problems of complex structure, large size and low heat dissipation efficiency in the prior art, and is characterized in that a heat dissipation pipe is mounted on a gas tank shell to form a natural convection heat exchange structure, a top heat dissipation box is mounted at the top of the gas tank shell, and a top heat dissipation box is mounted at the bottom of the gas tank shell; the lower end of the main bus in the gas tank shell is connected with a direct-acting three-station double-set disconnecting switch, and the lower part of the direct-acting three-station double-set disconnecting switch is connected with an arc extinguish chamber moving end flexible connector. The beneficial effects of the utility model are that through the heat dissipation structure design of a plurality of components with large heat productivity, the temperature in the air chamber is reduced through natural convection in the closed air chamber, and the problem of large-current temperature rise is solved; the conductive contact area is multiplied through the plurality of flexible connection conductors, and the through-current capability is improved; the size of a single conductive part is reduced through double sets of isolating switches of each phase, and the requirement of 12 kV / 4000 A large-current gas insulated metal-enclosed switchgear for the through-current capability is met.

Description

technical field [0001] The invention belongs to the technical field of high-current C-GIS, and particularly relates to a 12kV / 4000A high-current gas-insulated metal-enclosed switchgear with a rated voltage of 12kV and a rated current of 4000A, which uses clean and dry compressed air as the insulating medium. Background technique [0002] First of all, the temperature rise problem of high-current C-GIS is the main problem that plagues the entire industry, and it is also a bottleneck problem for switchgear manufacturers. In the prior art, fans or heat pipes are often used to solve the temperature rise problem of high-voltage gas-insulated metal-enclosed switchgear with large currents. For example, the utility model with application number CN201320717973.8 discloses "a high-current high-voltage switch with good heat dissipation effect Cabinet", the utility model includes a group of switch cabinet bodies, two cooling fans are installed in the front lower room of the switch cabin...

AI Technical Summary

Problems solved by technology

[0012] The heat dissipation structure design is adopted for the parts with large heat generation, and the volume of the inflatable cabinet is not increased. When the actual current is less than 4000A, there is no need for an external induced draft fan, and there is no post-maintenance. The air chamber can be lowered by natural convection in the airtight air chamber Internal temperature, to solve the problem of high current temperature rise;

Images