Miniaturized ground switch

Abstract

The invention relates to a miniaturized ground switch used in a high-voltage switch gear, which comprises three phase supporting insulators, three phase fixed contacts and three phase moving contact knives, wherein the three phase supporting insulators are installed on a framework, the three phase fixed contacts are installed on the supporting insulators, and the three phase moving contact knivesare matched with the fixed contacts; the bottoms of the three-phase supporting insulators are linearly arranged and installed on the framework, wherein the integral height of one phase supporting insulator in the middle is larger than the height of the two supporting insulators at both sides, so that the centers of the three phase fixed contacts installed at the tops of the three phase supportinginsulators are distributed on the three angles of an isosceles triangle; and the length of one phase moving contact knife in the middle of the three phase moving contact knives is larger than the length of the contact knives at both sides, so that the three phase moving contact knives can correspond to the positions of the three phase fixed contacts. The invention can shorten the size of a groundswitch in a width direction and decrease the installation area of the ground switch while ensuring interphase insulation distances, thereby being suitable for being installed in miniaturized high-voltage switch gears.

Description

technical field [0001] The invention relates to a miniaturized earthing switch for use in high voltage switchgear. Background technique [0002] The grounding switch is a device used in the high-voltage switchgear to ensure that the equipment is reliably grounded when needed. It usually includes a three-phase post insulator installed on the frame, a three-phase static contact installed on the post insulator, and a static contact. The three-phase moving contact knife matched with the head. In order to ensure the phase-to-phase insulation, the distance between the contacts of the existing grounding switch has specifications such as 150mm, 210mm, and 275mm. Since the three-phase contacts are distributed on a straight line, in order to ensure a sufficient distance between the phases, the width of the entire grounding switch is relatively large. Large, increasing the area it occupies, it is difficult to apply to some compact and miniaturized switch cabinets. Contents of the in...

AI Technical Summary

Problems solved by technology

In order to ensure the phase-to-phase insulation, the distance between the contacts of the existing grounding switch has specifications such as 150mm, 210mm, and 275mm. Since the three-phase contacts are distributed on a straight line, in order to ensure a sufficient distance between the phases, the width of the entire grounding switch is relatively large. Large, increasing the area it occupies, it is difficult to apply to some compact and miniaturized switch cabinets

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