Plug-in circuit breaker

Abstract

The invention relates to the field of low-voltage electric appliances, particularly to a plug-in circuit breaker, which comprises a circuit breaker shell provided with at least one protection electrode assembly cavity and at least one protection electrode, wherein one end of the operation button of the protection electrode is inserted into the circuit breaker shell, the operation button, a first wire outlet terminal and a first wire inlet terminal are arranged at the two ends of the circuit breaker shell respectively, an arc extinguishing system is arranged in the middle of the protection electrode assembly cavity and located on one side of the first wire inlet terminal, an operation mechanism is arranged between the operation button and the arc extinguishing system, the protection mechanism is arranged on one side of the operation mechanism and located between the first wire outlet terminal and the arc extinguishing system, the plug-in circuit breaker is in a closed state, when a short circuit state or an overload state exists, the protection mechanism drives the operation mechanism to act so as to make the plug-in circuit breaker enter an opening state, and after a fault is eliminated, the operation button is pressed to drive the operation mechanism to act so as to make the plug-in circuit breaker enter a closed state. The plug-in circuit breaker is compact in structure and small in size.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a plug-in circuit breaker. Background technique [0002] In the communication industry, the standard cabinet takes 1U as a working unit, and its height is about 44.45mm. With the rapid development of communication technology, the components inside the cabinet need to be continuously miniaturized to meet the installation size requirements of 1U units, so as to increase the density of components in the cabinet and save the overall volume of communication equipment. [0003] The height of the existing ordinary miniature circuit breakers is usually between 80mm and 90mm, plus the space for wire connection at the inlet and outlet terminals, it needs to occupy a height of 3U, which restricts the development of miniaturization of communication cabinets; in addition, ordinary miniature circuit breakers The outlet end of the switch is located inside the cabinet, which is ...

AI Technical Summary

Problems solved by technology

[0003] The height of the existing ordinary miniature circuit breakers is usually between 80mm and 90mm, plus the space for wire connection at the inlet and outlet terminals, it needs to occupy a height of 3U, which restricts the development of miniaturization of communication cabinets; in addition, ordinary miniature circuit breakers The position of the outgoing line is located inside the cabinet, which is not conducive to user wiring

Furthermore, if the auxiliary signal function is added to an ordinary small circuit breaker, it is often necessary to add auxiliary contact accessories or other similar functional accessories on the side of the circuit breaker to realize it, which increases the cost of use, takes up more installation space, and is not conducive to communication Cabinet miniaturization

Images