Interlocking device for earthing switch and door of switch cabinet

Abstract

The invention discloses an interlocking device for an earthing switch and a door of a switch cabinet. The interlocking device is characterized by comprising an earthing switch operating shaft, a lock catch mechanism and a transmission mechanism, wherein the earthing switch operating shaft is connected with the earthing switch and rotationally arranged on a base plate and moves between a power-on position and a power-off position; the lock catch mechanism is provided with a rod bolt arranged between a door leaf and a door frame of the door and a latch hole plate matched with the rod bolt; the transmission mechanism enables the earthing switch operating shaft and the rod bolt to be in transmission connection, at the power-on position, the rod bolt and the corresponding latch hole plate are locked, and at the power-off position, the rod bolt and the corresponding latch hole plate are unlocked. Through the interlocking structure, interlocking of a circuit breaker room door and a cable room door can be realized at the same time.

Description

technical field [0001] The invention relates to the technical field of high-voltage switch cabinets, in particular to an interlocking device for a grounding switch and a door of a switch cabinet. Background technique [0002] When the high-voltage switchgear fails or is overhauled, in order to ensure personal safety, the grounding switch must be closed before the operator can enter. Therefore, the interlocking of the grounding switch and the door in the high-voltage switchgear is indispensable. During the operation of the high-voltage switchgear, "five preventions" must be achieved: 1. After the vacuum circuit breaker trolley in the high-voltage switchgear is closed at the test position, the trolley circuit breaker cannot enter the working position; 2. The grounding in the high-voltage switchgear When the knife is closed, the trolley circuit breaker cannot be closed; 3. When the vacuum circuit breaker in the high-voltage switchgear is closed, the back door of the panel is lo...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the interlocking device in the switchgear in the prior art and usually only realize the interlocking between the earthing switch and one of the doors (circuit breaker room door or cable room door) and the reliability of electrical interlocking Low defects, thus providing an interlocking device for the grounding switch and the door of the switchgear

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