Mechanical and electric interlocking device of switching appliance

Abstract

The invention discloses a mechanical and electric interlocking device of a switching appliance. The device comprises a mounting plate, an interlocking plate and a first interlocking mechanism. Two first through holes 11 and 12 which are at an interval leftwards and rightwards are formed in the mounting plate; and the two first through holes 11 and 12 respectively correspond to two manual operation transmission rod assemblies 21 and 22. The interlocking plate can be connected with the mounting plate in a manner of sliding leftwards and rightwards and is provided with two second through holes 31 and 32 which are at an interval leftwards and rightwards; and the distance between the two second through holes 31 and 32 is different from that between the two first through holes 11 and 12. A first interlocking mechanism comprises shutting rod assemblies 41 and 42 of the state of a linked switching appliance; the shutting rod assemblies 41 and 42 move relatively to the mounting plate according to the change of the position of the switching appliance; and the movement can control whether the interlocking plate to slide leftwards and rightwards relatively to the mounting plate or not. The mechanical and electric interlocking device of the switching appliance has the advantages that the first interlocking mechanism is arranged so that the interlocking device can realize the manual operation isolation and the interlocking between every two grounding mechanisms and can realize the interlocking between the switching position and the manual operation.

Description

technical field [0001] The invention relates to a mechanical and electrical interlocking device of a switching device, in particular to a mechanical and electrical interlocking device of a three-position switching device. Background technique [0002] Three-position switches are generally known in high-voltage technology, for example: [0003] Document EP0763839B1 discloses a transmission device for a movable contact member of an isolating-earth switch. The movable contact can move from the first switching position through the intermediate position into the second switching position; in the first switching position, the movable contact engages with the first fixed contact; in the second switching position Inside, the movable contact piece is engaged with the second fixed contact piece; a contact piece transmission shaft is connected to a transmission plate, and the transmission plate has two openings, and the rotary motion of the transmission shaft is converted into the lin...

AI Technical Summary

Problems solved by technology

[0007] First, manual operation is not prohibited during electric operation, posing potential safety hazards;

[0008] Second, when the isolating switch is closed, when performing manual operation, that is, when returning to the middle position, the grounding side of the mechanism can be manually operated; when the grounding switch is closed, when performing manual operation, that is, returning to the middle position position, the isolated side of the mechanism can be operated manually; in both cases, the logic of the mechanism will be confused and there are potential safety hazards

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