Solid-insulated closing assembly for high-voltage alternating-current vacuum switch cabinet

Abstract

The invention discloses a solid-insulated closing assembly for a high-voltage alternating-current vacuum switch cabinet, comprising a fixing-sealing spine made of an insulating material as well as an irregular conducting rod, a first conducting plate, a second conducting plate, a one-phase vacuum circuit breaker and an end seat thereof, a vacuum isolation switch and an end seat thereof, a vacuum grounding switch and an end seat thereof, a lightning arrester and an end seat thereof, a voltage transformer end seat and an interbus end seat which are fixedly sealed in the fixing-sealing spine. The moving contact of the vacuum isolation switch and the first conducting plate as well as the moving contact of the vacuum circuit breaker and the second conducting plate are movably connected via a middle sliding contact respectively. The solid-insulated closing assembly has the following advantages that the traditional separate high-voltage components are integrated in the fixing-sealing spine, and all the electrified parts are packaged by adopting the solid insulating material and isolated from outside air, so that an electric shock hazard is avoided, and the use is safer. The overall size, weight, consumables and equipment floor area are reduced, and the solid-insulated closing assembly is convenient to connect and suitable for being used in all working conditions and high-altitude conditions.

Description

technical field [0001] The invention relates to a high-voltage switchgear, in particular to a solid insulation sealing assembly for a high-voltage AC vacuum switchgear. Background technique [0002] High-voltage AC vacuum switchgear is mainly used for power distribution in industrial and mining enterprises and secondary substations in power systems, power receiving, power transmission, automatic reactive power compensation devices and large-scale high-voltage motor starting, etc., for control, protection and monitoring. [0003] At present, most of the high-voltage AC vacuum switchgears are air-insulated power transmission and distribution devices, which are large in size and weight, consume a lot of raw materials, and occupy a large area of ​​equipment. The live part of the internal switching element is exposed, which is eroded by air and dust, which easily causes corrosion of the charged body and reduces the insulation level. The insulation problem of the port connected t...

AI Technical Summary

Problems solved by technology

[0003] At present, most high-voltage AC vacuum switchgears are air-insulated power transmission and distribution devices, which are large in size and weight, consume a lot of raw materials, and occupy a large area of ​​equipment

The live part of the internal switching element is exposed, which is eroded by air and dust, which can easily cause corrosion of the charged body and reduce the insulation level

The insulation problem of the externally connected port has not been solved. Due to the insufficient protection level, there is a risk of electric shock, which can easily cause personal injury and death, and the safety of use is poor.

Especially when used in outdoor box-type substations or outdoor high-voltage cable distribution boxes for urban cable distribution, it often cannot meet user requirements

[0004] In recent years, although solid-insulated power transmission and distribution switchgears have appeared, the poor sealing of the shells of such switchgears has reduced the safety of the electrical equipment in the shells, and it is inconvenient to connect the shells with other connectors. The surface is easy to discharge, and there are also defects of safety hazards in use

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