Switchgear interlocking mechanism and switchgear

Abstract

The invention discloses a switchgear door interlocking mechanism which comprises a front isolation board, a grounding operation shaft which rotates relative to the front isolation board, a first interlocking device having a locking state and an unlocking state, a second interlocking device movably arranged on the front isolation board, and a limiting plate arranged on the grounding operation shaft, when the grounding switch opens, the limiting plate abuts against the second interlocking device to limit the first interlocking device to the locking state, and when the grounding switch closes, the second interlocking device moves upward to allow the first interlocking device to be in an unlocking state. The switchgear comprises the switchgear door interlocking mechanism. Rotation of the grounding operation shaft drives the grounding switch to open and close, and the limiting plate also rotates. When the grounding switch opens, the first interlocking device is under the locking state, and the door can not be opened. When the grounding switch closes, the first interlocking device is under the unlocking state, and the door can be opened. The switchgear door interlocking mechanism and the switchgear have the advantages of simple structure, easy processing, assembly and operation, lower cost, reliable interlocking and maintenance convenience.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a switch cabinet interlocking mechanism and a switch cabinet. Background technique [0002] Switch cabinets are used in switching stations of power plants, substations of transmission lines, and user terminal substations for receiving electric energy. In addition to circuit breakers, there are disconnectors, grounding switches, transformers, lightning arresters and secondary circuits in the switchgear. Since the switchgear is a high-voltage power distribution device, its safety level is relatively high. In order to ensure the personal safety of the operators and the normal operation of the cabinet, the basic requirement for the switchgear is that the grounding switch must be grounded when the switchgear is in the maintenance state to ensure the safety of the maintenance personnel; The lower door of the switch cabinet is allowed to be opened, that is, the isol...

AI Technical Summary

Problems solved by technology

Most of the interlocking mechanisms in the prior art use electromagnetic interlocking mechanisms with complex structures. Due to the long service life of the switchgear, the internal coils and circuits are prone to aging and failure, which makes the service life of the electromagnet interlocking mechanisms shorter. , low reliability

The structure of the existing mechanical lower door interlocking mechanism is relatively complex, there are many parts to be processed, more materials are consumed, and the cost is high

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