Three position isolating switch

Abstract

The invention discloses a three-position switch. The three-position switch comprises an insulating box, a three-position regulating mechanism and a three-position operating mechanism, wherein the three-position regulating mechanism is arranged in the insulating box; the three-position regulating mechanism is controlled by the three-position operating mechanism and capable of switching among a switching-on position, an isolating position and a grounding position; a bus fixing structure for fixing a bus is arranged on the top of the insulating box; the bus fixing structure comprises a bus slot with two open end parts and an insulating cover; the bus slot is formed in the top of the insulating box; the insulating cover is arranged above the bus slot and used for sealing the bus slot; and a bus which is connected with the three-position regulating mechanism is arranged between the bus slot and the insulating cover. According to the three-position switch, the three-position isolating switch and the bus are connected together, and the bus is arranged between the bus slot and the insulating cover, so that the but is not required to expose outsides, thereby realizing full-insulation requirements, being capable of being used in various occasions, preventing a production safety accident in operation, and guaranteeing operation safety.

Description

technical field [0001] The invention relates to the technical field of isolating switches, in particular to a three-position isolating switch. Background technique [0002] Isolating switch, that is, when in the off position, there is an insulation distance between the contacts that meets the specified requirements and an obvious disconnection mark; when in the close position, it can carry the current under normal circuit conditions and abnormal conditions (such as short circuit) within a specified time under the current of the switching device. [0003] Three-position switch, English abbreviation 3PS, that is, 3position switchgear. The three-position switch is often used in fully enclosed combined electrical appliances (GIS) or combined electrical appliances (PASS), and is not a separate product. Commonly used in XGN ring main unit. The so-called three-position refers to three working positions: 1 is the closing position where the main breakout of the isolating switch is...

AI Technical Summary

Problems solved by technology

[0004] In order to achieve better safety performance, the structure of the three-position isolating switch on the market is relatively complicated, the volume is large, the operation is troublesome, and it cannot meet the requirements of miniaturization, and the accuracy and reliability of the switch action are poor.

[0005] The three-position isolating switch is usually connected to the bus bar. At present, the bus bar is basically exposed, which cannot meet the requirements of full insulation, and there are great potential safety hazards. It cannot be used in various occasions.

[0006] At present, the three-position isolating switch of the plug-in combined electrical appliances used in the power grid is mainly assembled by imported components, which has a complex structure, high cost, poor accuracy and poor reliability of the switching action.

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