Pole for normal-pressure sealing switch and normal-pressure sealing switch

Abstract

The invention relates to a normal pressure sealing switch and a pole column for the same, the pole column comprises a housing, the upper part of the inner cavity of the housing is provided with an arc extinguish chamber, the lower end of the arc extinguish chamber is connected with an outgoing line busbar through flexible connection, the flexible connection and the outgoing line busbar are connected with the static end of an insulation pull rod, and the moving end of the insulation pull rod penetrates out of the housing; the sealing switch comprises a metal box body, three pairs of bus bushings are arranged on a left side plate and a right side plate of the box body, three inverted pole columns and a transmission mechanism of a three-phase circuit breaker are installed on the upper portion of an inner cavity of the box body, the two ends of an outgoing line busbar of each pole column are connected with a pair of bus bushings, and a circuit breaker operating mechanism is installed on the outer side of the box body. The circuit breaker operating mechanism is connected with the three transmission mechanisms, and each transmission mechanism is connected with the moving end of the insulating pull rod of the corresponding pole. The pole can be detachably installed and maintained, the cost is reduced, the size is small, and the reliability is high; the sealing switch is simple and compact in structure, safe to use and convenient to maintain, and modular design can be achieved.

Description

technical field [0001] The invention relates to the technical field of power distribution equipment, in particular to a pole for a switchgear with all-metal, fully insulated and closed type, and the main insulating medium is air. Pole poles and normal pressure sealed switches for circuit breaker switches that cut off grid current. Background technique [0002] As an important field for the realization of the "double carbon" goal, the power industry's low-carbon development has a positive effect on the realization of my country's "double carbon" goal. Over the past decades, with the development of new insulating materials and technologies, many power distribution equipment manufacturers at home and abroad have carried out several major technical upgrades for medium-voltage switchgear. Finally to the process of solid insulation, environmental protection gas insulation. The defect of the air insulated switch is that it is bulky and occupies a large area; the defect of the SF6...

AI Technical Summary

Problems solved by technology

The defect of the air insulated switch is that it is bulky and occupies a large area; the defect of the SF6 gas insulated switch is that it is contrary to the concept of environmental protection; the defect of the solid insulated switch is its unsatisfactory temperature rise, which has been criticized by the industry; Positive pressure, the drawback of which is the risk of seal leaks or weld leaks

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