Miniature circuit breaker

Abstract

The invention relates to the field of low-voltage electric appliances, in particular to a miniature circuit breaker. The circuit breaker comprises a circuit breaker shell, an overload protection mechanism arranged in the circuit breaker shell, a moving contact, a static contact and an operating mechanism; the overload protection mechanism is in driving fit with the operating mechanism, and the moving contact is in driving connection with the operating mechanism; the overload protection mechanism comprises a first current-conducting plate, a first connecting plate and a bimetallic strip. The two ends of the first connecting plate are connected with the first current-conducting plate and the bimetallic strip respectively. The bimetallic strip is connected with the first conductive plate through a first flexible connection and is connected with the static contact through a second flexible connection. A third flexible connection is selectively arranged between the first conductive plate and the static contact. According to the miniature circuit breaker, the overload protection mechanism can be used for protection of overload current of more specifications.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a small circuit breaker. Background technique [0002] The use of circuit breakers can effectively improve the safety of electrical equipment and has been widely used. However, most existing circuit breakers have the following problems: [0003] 1. The existing circuit breakers are generally installed in the distribution box. When the circuit breaker needs to be repaired or the failed circuit breaker needs to be replaced, the operator needs to check the circuit breaker installed on the circuit step by step, which is cumbersome; especially for plug-in circuit breakers As far as circuit breakers are concerned, they are generally installed in cabinets with a large number of installations. It takes a lot of time and energy to overhaul, replace faulty circuit breakers, find specific circuit breakers, or judge the status of circuit breakers, which affects the maintenanc...

AI Technical Summary

Problems solved by technology

[0003] 1. The existing circuit breakers are generally installed in the distribution box. When the circuit breaker needs to be repaired or the failed circuit breaker needs to be replaced, the operator needs to check the circuit breaker installed on the circuit step by step, which is cumbersome; especially for plug-in circuit breakers As far as circuit breakers are concerned, they are generally installed in cabinets with a large number of installations. It takes a lot of time and energy to overhaul, replace faulty circuit breakers, find a specific circuit breaker, or judge the status of a circuit breaker, which affects the maintenance or search. or the efficiency of judgment, and there are certain security risks

[0004] 2. When the circuit breaker is used on some specific equipment with small space, there are defects such as inability to install or high installation cost

[0005] 3. The signal output component of the circuit breaker can only output a single type of signal, which cannot meet the demand; and the installation reliability of the signal output component is low

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