Operating device of three-station knife switch and three-station knife switch

Abstract

The invention discloses an operating device of a three-station knife switch and the three-station knife switch, and the operating device of the three-station knife switch comprises a mounting bracket, a driving shaft, a locking sheet, a locking shaft and a locking mechanism. The driving shaft is movably mounted on the mounting bracket; the locking piece is fixedly connected with the driving shaft, and the locking piece is correspondingly provided with a connection locking position, an isolation locking position and a grounding locking position; the locking shaft is mounted on the mounting bracket, moves relative to the mounting bracket and is provided with a first locking position for locking the connection locking position, the isolation locking position and the grounding locking position on the locking sheet and a first unlocking position for unlocking the connection locking position, the isolation locking position and the grounding locking position on the locking sheet; the locking mechanism is installed on the installation support, locks the locking shaft when the locking shaft is located at the first locking position, and unlocks the locking shaft, so that the locking shaft is driven by the locking piece to move to the first unlocking position. Through the arrangement, the locking piece can be prevented from being blocked by the locking mechanism.

Description

technical field [0001] The invention relates to the technical field of electrical switchgear, in particular to an operating device of a three-position knife switch and a three-position knife switch. Background technique [0002] The three-position knife switch is widely used in the power grid of the traction power supply of urban rail transit. The existing three-position knife switch usually rotates the moving contact between the on position, the isolation position and the ground position. switch, when the moving contact of the three-position knife switch is in the on position, the moving contact connects the feeder with the catenary, and when the moving contact of the three-position knife switch is in the isolation position, the moving contact The head disconnects the feeder from the catenary, and when the moving contact of the three-position knife switch is in the grounding position, the moving contact grounds the catenary. [0003] In order to prevent the moving contact ...

AI Technical Summary

Problems solved by technology

[0003] In order to prevent the misoperation of the moving contact of the three-position knife switch, the moving contact of the three-position knife switch needs to be locked when it is in one of the on position, the isolation position and the ground position. The moving mechanism used to drive the moving contact is usually locked by an electromagnetic lock. However, once the moving mechanism in the three-position knife switch is in direct contact with the locking rod of the electromagnetic lock and is stuck In some cases, the electromagnetic force obtained by electrifying the electromagnetic lock cannot pull the lock lever of the electromagnetic lock, which will lead to abnormal unlocking and serious safety hazards.

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