A handcart interlocking mechanism of a five-prevention interlocking device

Abstract

The invention discloses a handcart interlocking mechanism of a five-prevention interlocking device, which includes an operating shaft connected to a ground switch, which can transmit the torque of theground switch operating shaft to the transmission structure of the circuit breaker handcart, and a locking structure for preventing the circuit breaker handcart from being pulled out of the circuit breaker chamber when the ground switch is switched on, the locking structure is linked with the locking structure to prevent the limiting structure of the circuit breaker handcart from being operated when the ground switch is switched on, and the positioning structure for preventing the ground switch from being switched on when the circuit breaker handcart is not in the test position; The handcartinterlocking mechanism is safe and reliable, Through the cooperation of multiple structures, It is ensured that the earth switch operation shaft closes the earth switch only when the circuit breaker handcart is in the test position, and it is avoided that the circuit breaker handcart can be pushed into the working position by operating the worm of the handcart when the earth switch is closed, andthe circuit breaker handcart can be pulled out of the circuit breaker chamber when the earth switch is opened.

Description

technical field [0001] The invention relates to the technical field of handcart cabinets, in particular to a handcart interlocking mechanism of a five-proof interlocking device. Background technique [0002] When the handcart cabinet fails or is overhauled, in order to ensure personal safety, the grounding switch must be closed before the operator can enter, so the interlocking of the grounding switch and the door in the high-voltage switchgear is indispensable. During the operation of the handcart cabinet, "five preventions" must be achieved: 1. After the handcart of the circuit breaker in the handcart cabinet is closed at the test position, it cannot enter the working position; 2. The grounding knife of the handcart cabinet is closed. When the circuit breaker is in position, the circuit breaker cannot be closed; 3. When the circuit breaker in the handcart cabinet is closing, the machine on the grounding knife on the back door of the panel is locked with the cabinet door; 4...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing a safe and reliable, easy to operate, when the grounding switch is in the off state, the handcart of the circuit breaker can be shaken from the test position to the working position, and the circuit breaker The grounding switch cannot be closed when the device is in the working position, so as to effectively prevent misuse of the handcart interlock mechanism of the five-proof interlock device

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