Switching big-parameter bus transfer current device of extra-high voltage disconnector

Abstract

The invention discloses a switching big-parameter bus transfer current device of an extra-high voltage disconnector, which comprises an auxiliary contact (1), a contact rod (2), an arc extinguish chamber support (3), a shifting fork (4), a vacuum arc extinguish chamber (5), an insulation rod (6), an arc contact (7), a support (8) and an arc contact plate (9). In the invention, the vacuum arc extinguish chamber drives the contact rod by a moving contact to shift the shifting fork of the vacuum arc extinguish chamber so as to realize the switching off / on action of the vacuum arc extinguish chamber; the arc contact plate turns over along with the moving contact so as to realize the switching off / on action with the arc contact, whereas the vacuum arc extinguish chamber is separated from a main through-flow loop when a main switch blade is in normal through flow after being switched on, and thus, flow does not flow through the vacuum arc extinguish chamber, and therefore, damages caused by long-term through flow of the vacuum arc extinguish chamber can be effectively avoided; special treatment is carried out on the surface of the vacuum arc extinguish chamber and the outside of a transmission mechanism, which is more beneficial to the device being used in the outdoor environments. Therefore, the device has simple and compact structure, stable and reliable action, good matching timing sequence and long service life.

Description

technical field [0001] The invention relates to a structure of an isolating switch applied in an extra-high voltage power system, in particular to a device for switching a large-parameter bus bar of an extra-high voltage isolating switch. Background technique [0002] UHV transmission has the inherent characteristics of large capacity, long distance, low loss, and less land occupation. It is a transmission method in line with my country's basic national conditions. The adoption of UHV transmission technology can realize the optimal allocation of resources in a wider range, promote the efficient development and utilization of energy in my country, and promote the sustainable development of economy and society. With the development of my country's UHV power grid, the ability and scale of China's power grid to optimize resource allocation will be significantly improved, which will greatly promote the effective development and efficient use of domestic energy resources, and furt...

AI Technical Summary

Problems solved by technology

The current outdoor UHV AC isolating switch structure has design deficiencies, especially the inability to meet the parameter requirements of switching current of 6kV and 6300A for switching busbars, which restricts the pace of UHV line construction in my country

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