Circuit breaker switch cabinet

Abstract

A circuit breaker switch cabinet comprises a cabinet body, wherein a front cover panel, a lower cable chamber plate, a common air box, a lower cable chamber, a mechanism chamber and a secondary chamber are arranged on the cabinet body, the common air box is arranged at the middle of the cabinet body, the lower cable chamber is arranged at the lower part of the cabinet body, the common air box is a normal pressure seal box body, and normal pressure air is filled in the common air box. The mechanism chamber and the secondary chamber are respectively arranged at the front side and the rear side of the common air box, and the mechanism chamber is arranged at the middle of the cabinet body and is positioned at the rear side of the front cover panel. A three-phase vacuum arc-extinguishing chamber subassembly with one to three inlet and outlet conductive circuits, a transmission subassembly which is disconnected and connected with an arc-extinguishing chamber moving contact, an isolating and grounding three-station switch, an arc-extinguishing chamber insulation support frame subassembly and a low order bus insulation shielding structure subassembly are arranged in the common air box. The circuit breaker switch cabinet has the characteristics of compact structure, small integral cabinet size, safety, environmental friendliness, flexibility for operation, reliable performance, long service life, and low operation and maintenance costs.

Description

technical field [0001] The invention relates to a circuit breaker switchgear, in particular to an air-insulated compact circuit breaker switchgear for an AC distribution network. Background technique [0002] With the economic development of the society and the continuous acceleration of the urbanization process, more requirements are put forward for the construction of the distribution network. A large number of newly built or expanded urban distribution network substations are limited by the building area, requiring the area occupied by the power equipment of the distribution network. The area is further reduced, intensive use of land resources, and improvement of land use intensity. In order to meet the compact and miniaturized requirements of distribution network substations for power devices, various compact electrical switchgears continue to emerge. And its major technological breakthrough mainly comes from the adoption of sulfur hexafluoride SF20 years ago 6 Applica...

AI Technical Summary

Problems solved by technology

Third, the sealed box works under pressure, which requires high sealing, difficult processing, and complicated inspection and maintenance. Once leakage occurs, the insulation will be damaged, which will easily cause personal injury or death.

However, due to the high requirements of the vacuum processing technology of epoxy resin solid insulation, it is usually processed and solidified by stirring and pouring two-component or multi-component liquid materials, which is easy to generate tiny bubbles during processing, and generates partial discharge when there is high voltage. Risk of insulation failure due to breakdown during overvoltage

At the same time, since the epoxy resin solid material is a brittle material, it is easy to be damaged during installation and transportation.

Moreover, solid waste is generated during its production process

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