Vacuum cabinet rear forced interlocking mechanism

Abstract

A vacuum cabinet rear forced interlocking mechanism comprises a rear plate, an isolation cam, an isolation main shaft, a breaker cam, a breaker main shaft, a grounding cam and a grounding main shaft.The isolation cam is arranged on the isolation main shaft which is connected with an isolation switch rotating shaft; the circuit breaker cam is arranged on the circuit breaker main shaft; the circuitbreaker is connected with the circuit breaker switch rotating shaft; the grounding cam is arranged on a grounding main shaft which is connected with a grounding switch rotating shaft; a first interlocking linkage device and a second interlocking linkage device are arranged between the isolation cam and the circuit breaker cam and between the circuit breaker cam and the grounding cam, so that thecircuit breaker cannot be switched on when the isolation switch is switched off; after the isolation switch is switched on, the circuit breaker can be switched on; after the circuit breaker is switched on, the isolation switch and the grounding switch cannot be operated; and after the grounding switch is switched on, the circuit breaker cannot be switched on. The interlocking device is simple in structure, easy to operate and high in safety, the interlocking function among the isolation switch, the circuit breaker and the grounding switch can be reliably achieved, and misoperation accidents are avoided.

Description

technical field [0001] The invention relates to the technical field of power distribution vacuum cabinets, and more specifically relates to a rear-mounted compulsory interlocking mechanism of a vacuum cabinet. Background technique [0002] Vacuum cabinets are widely used in switching stations of power plants, substations of transmission lines, and user terminal substations for receiving electric energy. The vacuum cabinet is a power distribution equipment. In addition to the circuit breaker, there are isolation switches, grounding switches, transformers, lightning arresters and secondary circuits in the cabinet. [0003] Since the vacuum cabinet is a high-voltage power distribution device, its safety level is relatively high. The country requires that vacuum cabinets need to meet the five-proof requirements. The so-called five-proof requirements refer to: 1. Prevent the disconnection and closing of the isolating switch with load; When the switch is in the closed position, ...

AI Technical Summary

Problems solved by technology

[0004] In the traditional vacuum cabinet, the interlocking mechanism of the isolating switch, the circuit breaker switch and the grounding switch adopts a linkage transmission mode. During the operation process, there will often be jams or even failures, which will cause misoperation by the operator and cause personal injury. Safety poses a great hidden danger

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