CN115547761A - Compact single-pole circuit breaker - Google Patents

Abstract

The invention provides a compact single-pole circuit breaker, which comprises a shell, an incoming line terminal, an electromagnetic system, a static contact, an outgoing line terminal, a movable contact component, an intelligent control module and a piezoresistor, wherein a first mounting cavity and a second mounting cavity which are arranged side by side are formed in the shell; the intelligent control module is connected with the shell, the pressure sensitive resistor is assembled on the first through hole and is located between the incoming line terminal and the electromagnetic system, and the pressure sensitive resistor is connected with the intelligent control module. Through the layout structure of this scheme, realize installing circuit breaker body and intelligent control module simultaneously in 18 mm's circuit breaker casing.

Description

Compact single-pole circuit breaker

Technical Field

The invention relates to the field of circuit breakers, in particular to the field of miniature circuit breakers, and particularly relates to a compact single-pole circuit breaker.

Background

In the transformation and upgrading process of the distribution lines, accessories such as gateways and power supplies are often required to be added, so that the original and not-abundant space of the distribution box is narrower. Therefore, it is a trend to make the circuit breaker small. In the prior art, the total width of the 1P product (including the electric operation part) is 36mm; the total width of the 1P + N product (including the electrically operated portion) is 54mm. For products with smaller current grades, in order to save space as much as possible, thinner schemes are designed for circuit breakers and electric operators (namely intelligent control modules), the circuit breakers use thin electromagnetic systems, arc extinguishing chambers, motors, gear sets and the like, and although the circuit breakers can be reduced to a certain size, the reduced size is limited, and further reduction is difficult.

Disclosure of Invention

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a compact single-pole circuit breaker.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a compact single-pole circuit breaker comprises a shell, wherein an inlet wire terminal, an electromagnetic system connected with the inlet wire terminal, a static contact arranged on the electromagnetic system, an outlet wire terminal, a movable contact assembly connected with the outlet wire terminal, an intelligent control module and a piezoresistor connected with the intelligent control module are arranged in the shell, a first installation cavity and a second installation cavity which are arranged side by side are formed in the shell, the intelligent control module is arranged in the first installation cavity, and the inlet wire terminal, the electromagnetic system, the outlet wire terminal and the movable contact assembly are all arranged in the second installation cavity; the intelligent control module is connected with the shell, the pressure sensitive resistor is assembled on the first through hole and is located between the incoming line terminal and the electromagnetic system, and the pressure sensitive resistor is connected with the intelligent control module.

Furthermore, the wire inlet terminal is connected with a wiring board, and the electromagnetic system is electrically connected to the wiring board.

Furthermore, the wiring board is provided with a manganin section, the intelligent control module is connected with a detection wire, and the wire penetrates through the first through hole to the second installation cavity and is connected with the two ends of the manganin section through the wire so as to detect the voltage at the two ends of the manganin section.

Furthermore, the shell is internally provided with a leakage mutual inductor connected with the intelligent control module, the leakage mutual inductor is positioned between the moving contact component and the wire outlet terminal, and a live wire and a zero wire are arranged in the leakage mutual inductor in a penetrating manner.

Furthermore, a second through hole penetrating through the first mounting cavity and the second mounting cavity is formed in the position, between the moving contact assembly and the wire outlet terminal, of the shell, and the leakage transformer is assembled on the second through hole.

Furthermore, the intelligent control module comprises a control circuit board and a switching-on and switching-off driving device, the switching-on and switching-off driving device is in driving connection with the moving contact assembly, and the control circuit board is connected with the switching-on and switching-off driving device to control the switching-on and switching-off driving device to act; the piezoresistor is connected with the control circuit board.

Furthermore, the shell is sunken towards the second installation cavity to form an installation concave seat communicated with the first installation cavity, and a motor of the opening and closing driving device is assembled on the installation concave seat.

Further, the mounting recess is located at a position below the second through hole.

Further, the second installation cavity is also equipped with the arc extinguisher, electromagnetic system and leading-out terminal all are equipped with the arc guide plate that extends to the arc extinguisher position.

Further, the arc extinguisher is arranged at the lower position of the electromagnetic system.

Through the technical scheme provided by the invention, the method has the following beneficial effects:

the piezoresistor is arranged between the incoming line terminal and the electromagnetic system, direct sampling can be carried out, wiring is short, interference to electronic components of a circuit board and the like caused by the fact that wiring of a circuit board, stretching across the intelligent control module, of the piezoresistor in the prior art is avoided, and the circuit breaker body and the intelligent control module (namely an electric operation part) can be installed in a 18mm circuit breaker shell simultaneously through the layout structure of the scheme.

Drawings

Fig. 1 is a front view of a compact single-pole circuit breaker according to an embodiment;

fig. 2 is a plan view of the compact single pole circuit breaker of the embodiment;

fig. 3 is a side view of the compact single pole circuit breaker of the embodiment;

fig. 4 is an exploded view of the compact single pole circuit breaker according to the embodiment;

fig. 5 is a schematic view showing an internal structure of the compact single-pole circuit breaker in the second installation chamber according to the embodiment;

fig. 6 is a schematic view illustrating an internal structure of the compact single-pole circuit breaker in the first installation chamber according to the embodiment;

fig. 7 is a sectional view of a case of the compact single pole circuit breaker according to the embodiment;

fig. 8 is a schematic structural view of the intermediate housing in the embodiment.

Detailed Description

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. The components in the drawings are not necessarily to scale, and similar reference numerals are generally used to identify similar components.

The invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 8, the present embodiment provides a compact single-pole circuit breaker, specifically a single-pole circuit breaker with a width of 18mm, including a housing 10, where the housing 10 is provided with an incoming line terminal 21, an electromagnetic system 23 connected to the incoming line terminal 21, a fixed contact 24 disposed on the electromagnetic system 23, an outgoing line terminal 22, a movable contact assembly 25 connected to the outgoing line terminal 22, an intelligent control module 30 (i.e., an electrical operation portion), and a varistor 33 connected to the intelligent control module 30. Specifically, the composition structure, connection relationship and function of the above components are the prior art, for example, the contact or separation of the moving contact assembly 25 and the static contact 24 is matched to realize switching on or switching off; for example, the electromagnetic system 23 is used for corresponding to a tripping structure on the moving contact assembly 25 so as to trigger the tripping structure to trip in the case of short circuit; if the voltage dependent resistor 33 is used for clamping voltage when the power supply end circuit bears overvoltage, impact current is absorbed, and protection is realized; if the intelligent control module 30 comprises a control circuit board 31 and a switching-on/off driving device 32, the switching-on/off driving device 32 is in driving connection with the movable contact assembly 25, the control circuit board 31 is connected with the switching-on/off driving device 32 to control the switching-on/off driving device 32 to act, and the piezoresistor 33 is connected with the control circuit board 31; and so on.

The casing 10 is formed with first installation cavity 101 and the second installation cavity 102 that set up side by side, and is concrete, casing 10 comprises procapsid 11, middle casing 12 and back casing 13, and procapsid 11 and middle casing 12 are closed mutually and are constituteed second installation cavity 102, and middle casing 12 and back casing 13 are closed mutually and are constituteed first installation cavity 101. The intelligent control module 30 is arranged in the first mounting cavity 101, and the incoming line terminal 21, the electromagnetic system 23, the outgoing line terminal 22 and the moving contact assembly 25 are all arranged in the second mounting cavity 102; the electromagnetic system 23 is located between the wire inlet terminal 21 and the movable contact assembly 25, the housing 10 is provided with a first through hole 121 penetrating through the first mounting cavity 101 and the second mounting cavity 102 at a position between the wire inlet terminal 21 and the electromagnetic system 23, the first through hole 121 is formed in the middle housing 12, and the varistor 33 connected with the intelligent control module 30 is assembled on the first through hole 121 and located between the wire inlet terminal 21 and the electromagnetic system 23.

According to the technology provided by the scheme, the piezoresistor 33 is arranged between the inlet terminal 21 and the electromagnetic system 23, direct sampling can be carried out, wiring is short, interference on electronic components of a circuit board and the like caused by the fact that the piezoresistor 33 stretches across the wiring of the control circuit board 31 of the intelligent control module 30 in the prior art is avoided, and through the layout structure of the scheme, a breaker body (a structure which is formed by the inlet terminal 21, the electromagnetic system 23, the static contact 24, the outlet terminal 22, the movable contact assembly 25 and the like and can realize the switching-on and switching-off function of the breaker) and the intelligent control module 30 can be simultaneously installed in a 18mm breaker shell (the finger shell 10).

Further, in the present embodiment, a wiring board 211 is connected to the wire inlet terminal 21, and the electromagnetic system 23 is electrically connected to the wiring board 211 to facilitate wiring of the electromagnetic system 23. More specifically, the wiring board 211 has a manganin segment (not shown), the intelligent control module 30 is connected to a detection lead 311, and the lead 311 passes through the first through hole 121 to the second installation cavity and is connected to two ends of the manganin segment to detect the voltage at the two ends of the manganin segment. The manganin section has great resistance, and when circular telegram, the manganin section partial pressure definite value, can calculate the electric current size through detecting manganin section both ends voltage, and when the electric current was greater than the default (supposedly for 40A) and reachd 50A, intelligent control module 30 controlled moving contact subassembly 25 separating brake, make full use of first through-hole 121's structure, the wiring distance is short, compact. Of course, in other embodiments, this is not limiting.

Further, in this embodiment, a leakage transformer 26 connected to the intelligent control module 30 is further disposed in the housing 10, the leakage transformer 26 is located between the movable contact assembly 25 and the outlet terminal 22, and a live wire and a neutral wire are disposed in the leakage transformer 26 in a penetrating manner. Specifically, the live wire layout is as follows: the moving contact assembly 25 is connected with a flexible connection 251, the flexible connection 251 is used as a live wire to pass through the leakage transformer 26 to be connected to the outlet terminal 22, and the circuit layout is short. Meanwhile, the zero line can be directly led into the shell 10 to pass through the leakage mutual inductor 26, so that leakage detection is realized. When the leakage is detected, the intelligent control module 30 controls the moving contact assembly 25 to open.

More specifically, the housing 10 is provided with a second through hole 122 penetrating through the first mounting cavity 101 and the second mounting cavity 102 at a position between the movable contact assembly 25 and the outlet terminal 22, and the leakage transformer 26 is assembled on the second through hole 122. The earth leakage transformer 26 is mounted in a common space between the first mounting chamber 101 and the second mounting chamber 102, and the earth leakage transformer 26 can be laid out even in a compact case 10.

Of course, in other embodiments, the configuration of the leakage transformer 26, etc. may not be employed.

Specifically, the switching-closing driving device 32 of the intelligent control module 30 specifically includes a motor 321 and a gear transmission component 322, the motor 321 forms transmission connection with the moving contact component 25 through the gear transmission component 322, and the control circuit board 31 is connected to the motor 321 to control the motor 321 to operate. More specifically, the size of the motor 321 is larger, and in order to better arrange the motor 321, in this embodiment, the housing 10 is recessed into the second mounting cavity 102 to form a mounting recess 123 communicating with the first mounting cavity 101, and the motor 321 of the opening and closing drive device 32 is assembled on the mounting recess 123. By borrowing the space of the second installation cavity 102 to satisfy the installation of the motor 321, the size of the housing 10 does not need to be increased. More specifically, the mounting recess 123 is located below the second through hole 122, so that the space of the redundant second mounting cavity 102 is fully utilized, and reasonable layout is achieved. Of course, in other embodiments, the assembly structure of the motor 321 is not limited thereto.

Further, in this embodiment, the second installation cavity 102 is further equipped with an arc extinguisher 27, the electromagnetic system 23 and the outlet terminal 22 are both provided with arc conducting plates extending to the position of the arc extinguisher 27, the arc conducting plate connected to the electromagnetic system 23 is defined as an inlet end arc conducting plate 231, and the arc conducting plate connected to the outlet terminal 22 is defined as an outlet end arc conducting plate 221. Specifically, the arc extinguisher 27 is disposed at a position below the electromagnetic system 23, and the outlet end arc guide plate 221 extends to the position of the arc extinguisher 27 through the position between the second through hole 122 and the mounting recess 123; the circuit layout is reasonable and simple. Of course, in other embodiments, this is not limiting.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides a compact single-pole circuit breaker, includes the casing, be provided with inlet wire terminal, the electromagnetic system who connects inlet wire terminal in the casing, set up static contact, outlet terminal on the electromagnetic system, connect outlet terminal's movable contact subassembly, intelligent control module and connect intelligent control module's piezo-resistor, its characterized in that: a first mounting cavity and a second mounting cavity which are arranged side by side are formed in the shell, the intelligent control module is arranged in the first mounting cavity, and the incoming line terminal, the electromagnetic system, the outgoing line terminal and the moving contact assembly are all arranged in the second mounting cavity; the intelligent control module is connected with the shell, the pressure sensitive resistor is assembled on the first through hole and is located between the incoming line terminal and the electromagnetic system, and the pressure sensitive resistor is connected with the intelligent control module.

2. The compact single pole circuit breaker of claim 1, wherein: the incoming terminal is connected with a wiring board, and the electromagnetic system is electrically connected to the wiring board.

3. The compact single pole circuit breaker of claim 2, wherein: the wiring board is provided with a manganin section, the intelligent control module is connected with a detection lead, and the lead penetrates through the first through hole to the second installation cavity and is connected with the two ends of the manganin section so as to detect the voltage at the two ends of the manganin section.

4. The compact single pole circuit breaker of claim 1, wherein: the shell is internally provided with a leakage mutual inductor connected with the intelligent control module, the leakage mutual inductor is positioned between the moving contact component and the wire outlet terminal, and a live wire and a zero wire are arranged in the leakage mutual inductor in a penetrating manner.

5. The compact single pole circuit breaker of claim 4, wherein: the shell is provided with a second through hole which penetrates through the first mounting cavity and the second mounting cavity at a position between the moving contact assembly and the outlet terminal, and the leakage transformer is assembled on the second through hole.

6. The compact single pole circuit breaker of claim 1 or 5, wherein: the intelligent control module comprises a control circuit board and a switching-on and switching-off driving device, the switching-on and switching-off driving device is in driving connection with the moving contact assembly, and the control circuit board is connected with the switching-on and switching-off driving device to control the switching-on and switching-off driving device to act; the piezoresistor is connected with the control circuit board.

7. The compact single pole circuit breaker of claim 6, wherein: the shell is sunken towards the second mounting cavity to form a mounting concave seat communicated with the first mounting cavity, and a motor of the opening and closing driving device is assembled on the mounting concave seat.

8. The compact single pole circuit breaker of claim 7, wherein: the mounting recess is located at a position below the second through-hole.

9. The compact single pole circuit breaker of claim 1, wherein: the second installation cavity is also provided with an arc extinguisher, and the electromagnetic system and the outlet terminal are provided with arc guide plates extending to the position of the arc extinguisher.

10. The compact single pole circuit breaker of claim 9, wherein: the arc extinguisher is arranged at the lower position of the electromagnetic system.

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