Three-position switch structure for comprehensive cabinet

Abstract

A three-position switch structure for a comprehensive cabinet disclosed by the present invention comprises a grounding contact, a bus contact, a U-shaped contact and an insulating turntable, the surface of the insulating turntable is equipped with a first metal contact piece and a second metal contact piece, the first metal contact piece is electrically connected with a rotating shaft of the insulating turntable, and the rotating shaft is electrically connected with a connector lug. A first cavity and a second cavity which are filled with conductive liquid and communicated with each other at the top are formed in the right side of the insulating turntable, the volume of the first cavity is larger than that of the second cavity and is positioned on the left side of the second cavity, the first cavity is provided with a metal electrode in contact with the first metal contact piece, and the second cavity is provided with a metal electrode in contact with the second metal contact piece; and the left side and the right side of the insulating turntable are respectively provided with a grounding contact and a bus contact, and the left side and the right side below the insulating turntableare provided with U-shaped contacts. When the first metal contact piece of the insulating turntable is contacted with the bus contact head, the circuit is disconnected firstly, and the problem of contact part electric corrosion caused by small contact area and large current at the moment of closing is solved.

Description

technical field [0001] The invention relates to the technical field of electric switches, in particular to a three-position switch structure for an integrated cabinet. Background technique [0002] The low-voltage three-position switch in the integrated cabinet integrates opening, closing, and grounding. The switch meets the functions of opening, closing, and grounding. The side-turn inspection and maintenance of the low-voltage switch in the integrated cabinet can be shortened from 30 minutes to 7 minutes to complete the operation, and the contact is firm. Reliable, not easy to cause equipment damage, and improve the safety guarantee of personnel construction operations. However, during the closing process of the existing three-position switch, the contact area between the switch knife and the bus contact is small at the moment of contact. The electric corrosion of the parts will affect the use of the switch. Contents of the invention [0003] In view of the above-menti...

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned prior art, the present invention provides a three-position switch structure for an integrated cabinet. When the first metal contact piece of the insulating turntable contacts the busbar contact head, the line is disconnected first, so as to solve the problem of small contact area and low current at the moment of closing. Large electrical corrosion problems caused by contact parts

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