An operating mechanism for a three-position switch

Abstract

The invention discloses an operating mechanism used for a three-station switch. The operating mechanism comprises partition plates, an output main shaft, a drive mechanism and a limiting mechanism, wherein the drive mechanism controls rotation of the output main shaft so that an output shaft connecting lever on the output main shaft can swing between the isolation station, the grounding station and the switch-on station, the drive mechanism comprises an operating main shaft, a grounding main shaft and a switch-on main shaft, and the operating main shaft drives the grounding main shaft and the switch-on main shaft so as to drive the output main shaft to rotate to the grounding position and the switch-on position. One end of the grounding main shaft and one end of the switch-on main shaft are respectively provided with a connecting lever and a spring, wherein the connecting levers and the springs can drive the output main shaft to rotate rapidly, and the limiting mechanism locks the output shaft connecting lever located in the isolation station or the grounding station or the switch-on station. The operating mechanism used for the three-station switch has good switching-on performance, the output main shaft can be accurately limited in the isolation position or the grounding position or the switch-on position, abrasion among all parts can be reduced, and the mechanical service life of limiting parts can be prolonged to the maximum.

Description

technical field [0001] The invention relates to the technical field of high-voltage switches, in particular to an operating mechanism for a three-position switch. Background technique [0002] In recent years, with the continuous advancement of high-voltage switchgear technology, gas-insulated metal-enclosed switchgear has developed in the direction of miniaturization, compounding, multi-functionalization of components, and intelligence. The isolating switch and the grounding switch are combined into a three-position isolation / grounding switch , can save the electrical operation interlock, realize the natural mechanical interlock, there is no misoperation between the isolating switch and the grounding switch. In this way, it is necessary to use an operating mechanism that can not only realize the switching among the three positions of the connected position, the grounded position, and the isolated position, but also meet various mechanical and electrical interlock requiremen...

AI Technical Summary

Problems solved by technology

[0007] For this reason, the technical problem that the present invention mainly solves is that the three-position operating mechanism of the existing mechanical interlock has a short service life, and the grounding and connection position limit is not reliable, resulting in the problem that the output angle of the output shaft is not accurate enough;

[0008] The second technical problem to be solved by the present invention is that the existing three-position operating mechanism cannot provide the output energy satisfying the closing short-circuit current of the earthing switch.

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