Closable state indicating device of circuit breaker and operating mechanism matched with the device

Abstract

The invention discloses a closeable state indicating device of a breaker and an operating mechanism cooperating with the closeable state indicating device and belongs to the technical field of low-voltage apparatus. The closeable state indicating device of the breaker comprises a first linkage shaft, a first contact pin, a second contact pin and a closeable state indicating panel, wherein the first contact pin is connected to the rear end of the first linkage shaft, the closeable state indicating panel is connected to the front end of the first linkage shaft, and the second contact pin is connected to the rear end of the first linkage shaft. The operating mechanism comprises an energy storage mechanism, a switching-closing transmission mechanism, a lock catch mechanism and a closing button nullifying mechanism, wherein the energy storage mechanism, the switching-closing transmission mechanism and the lock catch mechanism are matched with the indicating device, so that the indicating device can indicate a closeable state when the breaker meets three necessary closing conditions; the closing button nullifying mechanism is used for guaranteeing that a closing button is void when the breaker can not be closed. According to the closeable state indicating device of the breaker and the operating mechanism cooperating with the closeable state indicating device, it can be guaranteed that closing is executed after the breaker meets the three closing conditions, and the structure of the indicating device is greatly simplified.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, and more specifically relates to a circuit breaker closeable state indicating device and an operating mechanism matched with the device. Background technique [0002] As a kind of electrical equipment that controls the on-off of the transmission line, the performance of the circuit breaker directly affects the safety of the downstream electrical equipment. Any failure of the circuit breaker may cause huge economic losses or even casualties. The operating mechanism is the executive part of the circuit breaker and the core of the entire circuit breaker. It is responsible for providing the energy required for the opening and closing operations of the circuit breaker and performing the opening and closing operations. [0003] The circuit breaker includes at least a pair of contacts and an operating mechanism for closing and opening the contacts, and the operating mechanism c...

AI Technical Summary

Problems solved by technology

[0004] 1. The operating mechanism must store energy;

[0005] 2. The circuit breaker must be in the disconnected state;

[0006] 3. The opening lock must be in the free position

The application solves the problem of indicating the closing state of the circuit breaker to a certain extent, but the application designs four contact pins to cooperate with the transmission mechanism, the energy storage mechanism and the opening half shaft to judge the position and state of the circuit breaker. Not only is the structure of the state indicating device itself complex, resulting in higher design and manufacturing costs; at the same time, the structural complexity of the circuit breaker operating mechanism that cooperates with the indicating device will also increase accordingly, which will bring new problems to the production and assembly of the entire circuit breaker. In addition, the complex structural design will also lead to a corresponding increase in the failure rate of the status indicating device, which will bring hidden dangers to the safe operation of the circuit breaker

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