Three-position solid insulation switchgear

Abstract

The invention discloses a three-position solid insulation switchgear. The three-position solid insulation switchgear comprises an A-phase main loop box body, a B-phase main loop box body and a C-phase main loop box body, the A-phase main loop box body, the B-phase main loop box body and the C-phase main loop box body are assembled together in a parallel mode and share a main shaft, the main shaft is rotated to drive a separation cutter to swing around a static contact seat through a turning handle and a separation cutter insulation draw rod, and the separation cutter is made to carry out switching contact between an input end and a grounding static contact or to stay between the input end and the grounding static contact to form a separation position. Due to the fact that the three-position solid insulation switchgear is used, a three-position switch function can be effectively achieved through the separation cutter, a main shaft is used for being rotated in multiple isolation pieces, the structure is simple, and the operation is convenient; three working positions can be seen through an observation window; damp-proof measures are arranged inside an insulation shell, and a damp-proof box is replaced by observing the condition that drying agents in a drying agent box are damped and deepened.

Description

technical field [0001] The invention relates to the technical field of high-voltage power distribution equipment, in particular to a three-position solid insulation switchgear. Background technique [0002] SF 6 Inflatable cabinets are widely used in the medium voltage field, but a large number of SF 6 The gas will pollute and damage the environment, so from the perspective of environmental protection, use less or no SF 6 Gas electrical equipment should be the development direction of the high-voltage electrical manufacturing industry. The solid insulated ring network cabinet is considered as an environment-friendly switchgear. It uses APG epoxy resin to cast the array switches and related live parts as a whole, and designs and manufactures solid insulated power supply equipment through automatic pressure gel technology, without SF. 6 Gas is harmful gas, so the solid insulation ring network cabinet has been developed rapidly in recent years. At present, many manufacturer...

AI Technical Summary

Problems solved by technology

[0006] Although the above technology also has an observation window, only one or two working positions can be seen, and the three working positions in the switch cabinet cannot be seen.

In addition, although a fully enclosed structure is used in the switchgear to isolate it from the outside world, it cannot completely ensure that there is no leak point. In case of water vapor entering and condensation, the insulation performance will be damaged and cause insulation shock. Occurrence of wearing accidents

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