A tight locking device for an isolating circuit breaker

Abstract

Provided is a locking device of an isolation breaker. The device is mounted in a control box of the breaker, the device comprising a substrate (1), a drive motor (2), a control motor (3), a drive shaft (4), a limiting shaft sleeve (5), a shaft sleeve guide seat (6) and a travel switch (7), wherein when a grounding switch is switched on, the drive motor (2) operates, driving a bevel gear a (21) to rotate so as to transmit a force to a bevel gear b (42); then the bevel gear b (42) rotates, so as to drive the drive shaft (4) to rotate; an external thread on the drive shaft (4), when rotating, drives the limiting shaft sleeve (5) to displace along a horizontal direction, such that an end portion of the limiting shaft sleeve (5) moves to a position of a limiting sheet on a breaker operating lever and abuts the limiting sheet, and when a travel control lever (52) connected to the limiting shaft sleeve (5) moves to a position of the travel switch (7), the travel switch is triggered, causing the drive motor (2) to stop rotating. The invention can also enable the limiting shaft sleeve (5) to cooperate with the limiting sheet on the breaker operating lever by means of closing a controller (44) of the drive motor and by means of manually rotating the drive shaft (4).

Description

technical field [0001] The invention relates to the field of circuit engineering, in particular to a tight locking device for an isolation circuit breaker. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. [0003] Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. Combination with overheating and underheating relays, etc. Moreover, there is generally no need to change parts after breaking the fault current. At present, it has been widely used. [0004] When the general isolation circuit breaker is working, the circuit breaker cannot be closed ...

AI Technical Summary

Problems solved by technology

[0004] When the general isolation circuit breaker is working, the circuit breaker cannot be closed when the ground knife is closed; on the contrary, when the circuit breaker is closed, the ground knife cannot be closed. In the case of misoperation or automatic closing, it is necessary to make the circuit breaker through the form of tight lock control when the ground knife is closed, so that the circuit breaker cannot be closed

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