Signal sampling structure of circuit breaker

Abstract

A signal sampling structure of a circuit breaker provided by the present application comprises a housing and a circuit breaker pole module and a circuit board arranged in the housing, the circuit breaker pole module comprises a contact mechanism, a first circuit breaker pole terminal and a second circuit breaker pole terminal, and the contact mechanism comprises a moving contact and a static contact which are cooperatively used. The moving contact and the static contact are respectively connected with a first circuit break pole terminal and a second circuit break pole terminal to form a main loop of the circuit break pole module, a first sampling structure is arranged in the shell, and the first sampling structure comprises a conductive piece connected to the main loop of the circuit break pole module; the conductive part and the circuit board are overlapped along the thickness direction of the shell and are arranged at an interval, a first sampling area is arranged on the circuit board corresponding to the conductive part, and the first sampling pressure spring is connected between the conductive part and the first sampling area of the circuit board in an elastic compression manner. The first sampling pressure spring plays a conductive role, does not need welding, and is convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a signal sampling structure of a circuit breaker. Background Art

[0002] With the advancement of science and technology, circuit breakers are increasingly becoming more versatile and intelligent. Some intelligent circuit breakers require the transmission of sampled current and voltage signals from the main circuit current and voltage to the control circuit board. Existing intelligent circuit breakers on the market primarily use signal sampling methods such as welding sampling wires to the main circuit, fastening with screws, and connecting with conductive parts. This results in a complex structure and inconvenient installation. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a signal sampling structure for a circuit breaker which does not require welding, has a simple structure, is easy to install, and has high working efficiency.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The present application provides a signal sampling structure for a circuit breaker, comprising a housing, a disconnecting pole module and a circuit board disposed within the housing, wherein the disconnecting pole module comprises a contact mechanism, a first disconnecting pole terminal, and a second disconnecting pole terminal. The contact mechanism comprises a movable contact and a stationary contact for use in conjunction with each other, the movable contact and the stationary contact being respectively connected to the first disconnecting pole terminal and the second disconnecting pole terminal to form a main circuit of the disconnecting pole module. A first sampling structure is disposed within the housing, the first sampling structure comprising a conductive member connected to the main circuit of the disconnecting pole module, the conductive member overlapping and spaced apart from the circuit board in a thickness direction of the housing, a first sampling area being provided on the circuit board at a position corresponding to the conductive member, and a first sampling compression spring being elastically compressed and connected between the conductive member and the first sampling area of ​​the circuit board.

[0006] In one possible implementation, the shell includes a circuit breaker base and an upper cover, the upper cover is covered on the circuit breaker base along the thickness direction of the shell, the circuit breaker base is provided with a first boss of a columnar structure arranged along the thickness direction of the shell, the circuit board includes a first mounting hole, the first sampling area is arranged around the first mounting hole, the circuit board is installed in the circuit breaker base and the first mounting hole is sleeved on the bottom of the first boss, the first sampling compression spring is sleeved on the first boss and is in contact with the first sampling area.

[0007] In a possible implementation, it includes a disconnecting pole terminal plate connected in series in a main circuit of the disconnecting pole module, and the conductive member is the disconnecting pole terminal plate.

[0008] In a possible implementation, a groove is provided on the top of the first boss, and the disconnecting pole terminal plate is clamped in the groove.

[0009] In a possible implementation, it further includes a through-pole module disposed in the shell, wherein the through-pole module includes a first through-pole terminal, a through-pole terminal plate, and a second through-pole terminal connected in sequence.

[0010] In one possible implementation, a second sampling structure is further provided in the shell, and the second sampling structure includes a second sampling compression spring, which is elastically compressed and connected between the straight-through pole terminal board and the second sampling area of ​​the circuit board. A second boss is provided on the circuit breaker base, and the second mounting hole of the circuit board is sleeved on the bottom of the second boss. The second sampling area is arranged around the second mounting hole. The second sampling compression spring is sleeved on the second boss and is in contact with the second sampling area. The straight-through pole terminal board is clamped in the groove on the top of the second boss.

[0011] In a possible implementation, a signal output terminal is provided between the first straight-through terminal and the first disconnecting terminal, and the signal output terminal is electrically connected to the circuit board.

[0012] In one possible implementation, the circuit breaker module also includes an operating member and an operating mechanism, the operating member is connected to the operating mechanism, and the operating mechanism is connected to the moving contact drive, the operating member, the second straight-through pole terminal and the second circuit breaker terminal are all arranged at one end in the length direction of the shell, and the first straight-through pole terminal, the first circuit breaker terminal and the signal output terminal are all arranged at one end in the length direction of the shell.

[0013] In a possible implementation, the first sampling area and the second sampling area are annular pads.

[0014] In one possible implementation, the circuit board is provided with a circuit breaker protection circuit, which monitors whether the main circuit of the circuit breaker module has an overload or short-circuit fault based on the current signal and / or voltage signal collected by the first sampling structure and / or the second sampling structure; and / or the circuit breaker module further includes an electric operating device, which includes a motor and a gear set, the motor being driven and engaged with the operating mechanism through the gear set, the motor being electrically connected to the circuit board, and the circuit board being provided with a control circuit for automatic opening and closing control.

[0015] Compared with the prior art, the signal sampling structure of the circuit breaker provided in the present application is provided with a circuit breaker pole module and a circuit board in the circuit breaker housing, and a first sampling compression spring is provided between the circuit breaker pole module and the circuit board. The first sampling compression spring can be used to transmit the electrical signal in the circuit breaker pole module to the circuit board to realize the collection of current signals and voltage signals. Among them, the first sampling compression spring can not only play a conductive role, does not require welding, has a simple structure, and is easy to assemble, which greatly improves the work efficiency of production personnel, but also plays a role in limiting the circuit board along the thickness direction of the housing.

[0016] In particular, the provision of the first boss allows for both limiting and securing the circuit board and the first sampling compression spring. Furthermore, by providing a groove on the first boss, the disconnecting terminal block can be snapped into the groove, limiting and securing the disconnecting terminal block. The first boss simultaneously serves multiple functions. The disconnecting terminal block can compress the first sampling compression spring through the groove, placing it in a compressed state. The compressed first sampling compression spring requires no welding and exhibits excellent electrical conductivity, ensuring a stable and reliable sampling signal.

[0017] In addition, the disconnecting pole terminal plate is formed by bending a sheet metal plate, and the folded structure can adapt to the corresponding structure of the shell, which has an aesthetic structure, saves space and is easy to install.

[0018] In addition, by setting up a second sampling structure, a sampling signal of the N-pole line can be obtained. Since the first sampling structure is set on the L-pole circuit breaker module, by setting up the second sampling structure and the first sampling structure on the N-pole and L-pole of the circuit breaker respectively, the welding process is reduced, making the circuit breaker assembly convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the circuit breaker of this application;

[0020] Figure 2 This is a structural diagram of the circuit breaker terminal board of the present application;

[0021] Figure 3 It is a structural diagram of the circuit board of this application;

[0022] Figure 4 、 Figure 5 It is a structural diagram of the circuit breaker base of the present application;

[0023] Figure 6 This is a schematic diagram of the structure of the first sampling compression spring and the second sampling compression spring of the present application;

[0024] In the figure, the first circuit breaker terminal 101; the first direct-through terminal 102; the circuit breaker base 103; the signal output terminal 104; the moving contact 106; the operating mechanism 107; the electric operating device 108; the operating member 109; the circuit board 1; the first sampling area 11; the first mounting hole 12; the second sampling area 13; the second mounting hole 14; the first sampling compression spring 2; the first boss 3; the groove 31; the circuit breaker terminal board 4; the direct-through terminal board 5; the second sampling compression spring 6; the second boss 7; and the groove 71. DETAILED DESCRIPTION

[0025] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the present utility model. The protection scope of the present utility model is not limited to the description of the following embodiments.

[0026] like Figure 1 As shown, the circuit breaker of the present application includes a shell and a circuit breaker module arranged in the shell, the circuit breaker module includes an operating mechanism 107, a contact mechanism, a first circuit breaker terminal 101 and a second circuit breaker terminal (not shown in the figure), the contact mechanism includes a static contact and a moving contact 106 used in conjunction with each other, the static contact and the moving contact 106 are respectively connected to the second circuit breaker terminal and the first circuit breaker terminal 101, forming a main circuit of the circuit breaker module, an operating member 109 is arranged at one end of the shell, the operating member 109 is connected to the operating mechanism 107, and the operating mechanism 107 is driven and connected to the moving contact 106; the operating member 109 can be a button mechanism or a handle mechanism, pressing or pulling the button mechanism, or swinging the handle mechanism, driving the moving contact 106 and the static contact to close or disconnect through the operating mechanism 107, so that the circuit breaker is closed or opened. The operating member 109, the second straight-through pole terminal and the second disconnecting pole terminal are all arranged at one end of the shell in the length direction, and the first straight-through pole terminal 102, the first disconnecting pole terminal 101 and the signal output terminal 104 are all arranged at one end of the shell in the length direction.

[0027] The disconnect pole module refers to a disconnect pole module having one or more separable breakpoints between the connection terminals at both ends.

[0028] The circuit breaker module also includes a short-circuit protection mechanism, an overload protection mechanism, and an arc extinguishing chamber. The first circuit breaker terminal 101, the overload protection mechanism, the contact mechanism, the short-circuit protection mechanism, and the second circuit breaker terminal are connected in series. The short-circuit protection mechanism and the overload protection mechanism are respectively driven and coordinated with the operating mechanism 107. When a short circuit or overload fault occurs in the circuit breaker, the short-circuit protection mechanism or the overload protection mechanism triggers the operating mechanism 107 to trip, causing the circuit breaker to trip. The arc extinguishing chamber cooperates with the contact mechanism to extinguish the arc generated when the movable contact 106 and the static contact are closed or opened. The operating mechanism 107 can be used to drive the movable contact 106 and the static contact to close or open, thereby closing or opening the circuit breaker.

[0029] Preferably, the disconnect pole module further includes an electric operating device 108, which includes a motor and a gear set. The motor is driven by an operating mechanism 107 through the gear set, and the operating mechanism 107 is driven and connected to the movable contact 106. The electric operating device 108 can drive the movable contact 106 to close or open with the static contact by controlling the operating mechanism 107.

[0030] Preferably, the circuit breaker housing of the present application further includes a signal sampling structure for sampling voltage signals and current signals in the circuit.

[0031] An improvement of the present application lies in the signal sampling structure provided in the housing.

[0032] like Figure 1 As shown, the present application provides a signal sampling structure of a circuit breaker. In a preferred embodiment, the interior of the circuit breaker can be set as a single-phase line. The single-phase line means that the circuit breaker of the present application only includes two wiring terminals, which can be installed in series in the L pole of the working circuit, and no N pole terminal is set inside the circuit breaker. In this case, the signal sampling structure of the circuit breaker includes a shell and a circuit breaker module and a circuit board 1 arranged in the shell. The circuit breaker module includes a contact mechanism, a first circuit breaker terminal 101 and a second circuit breaker terminal (not shown in the figure). The contact mechanism includes a movable contact 106 and a static contact used in conjunction with each other. The movable contact 106 and the static contact are respectively connected to the first circuit breaker terminal 101 and the second circuit breaker terminal to constitute the main circuit of the circuit breaker module. A first sampling structure is provided in the shell, and the first sampling structure includes a conductive member connected to the main circuit of the circuit breaker module. The conductive member overlaps with the circuit board 1 in the thickness direction of the shell and is arranged at intervals. A first sampling area 11 is provided on the circuit board 1 at a position corresponding to the conductive member, and a first sampling compression spring 2 is elastically compressed and connected between the conductive member and the first sampling area 11 of the circuit board 1. By arranging a circuit breaker pole module and a circuit board 1 in the circuit breaker housing, and arranging a first sampling compression spring 2 between the circuit breaker pole module and the circuit board 1, the first sampling compression spring 2 can be used to transmit the electrical signal in the circuit breaker pole module to the circuit board 1, thereby realizing the collection of current signals and voltage signals. Among them, the first sampling compression spring 2 can not only play a conductive role, without the need for welding, and easy assembly, but also play a role in limiting the circuit board 1 along the thickness direction of the housing.

[0033] In one possible implementation, the housing includes a circuit breaker base 103 and an upper cover, the upper cover being covered on the circuit breaker base 103 along the thickness direction of the housing. The circuit breaker base 103 is provided with a first boss 3 having a columnar structure arranged along the thickness direction of the housing. The circuit board 1 includes a first mounting hole 12, and the first sampling area 11 is arranged around the first mounting hole 12. The circuit board 1 is installed in the circuit breaker base 103 and the first mounting hole 12 is sleeved on the bottom of the first boss 3. The first sampling compression spring 2 is sleeved on the first boss 3 and is in contact with the first sampling area 11. The structure of the first mounting hole 12 can be set to be the same as the maximum cross-section of the first boss 3, which is convenient for limiting and fixing the circuit board 1. By providing the first boss 3, both the circuit board 1 and the first sampling compression spring 2 can be limited and fixed. Figure 1 The horizontal direction is the length direction of the shell, the vertical direction is the width direction of the shell, and the direction perpendicular to the paper surface is the thickness direction of the shell.

[0034] Among them, the first boss 3 is arranged on the circuit breaker base 103. It can be cast integrally with the circuit breaker base 103, or it can be a bump installed on the circuit breaker base 103. It and the circuit breaker base 103 are both made of insulating materials for achieving electrical isolation from the internal components of the circuit breaker.

[0035] Furthermore, in a possible implementation, the first boss 3 may be a cylindrical structure with a smooth surface, and the first sampling compression spring 2 may be easily sleeved inside the first boss 3 .

[0036] Further, such as Figure 4 、 Figure 5 As shown, the first boss 3 is a cylindrical structure, and arc-shaped protrusions with symmetrical structures are provided on both sides of the cylindrical structure. The design structure is symmetrical and beautiful in shape.

[0037] In addition, the structure of the first boss 3 can have multiple embodiments. All technical features that are similar in structure and function to the first boss 3 in this embodiment fall within the protection scope of the present utility model.

[0038] In one possible implementation, the conductive member may be a static contact, which is directly connected to the first sampling compression spring 2 through the static contact. In addition, in one possible implementation, a disconnecting pole terminal plate 4 may be connected between the static contact and the first boss 3, and the disconnecting pole terminal plate 4 is connected in series in the main circuit of the disconnecting pole module. In this case, the conductive member may be a disconnecting pole terminal plate 4, and the disconnecting pole terminal plate 4 is as follows: Figure 1 The bent structure shown is formed by bending a sheet of metal. In this embodiment, the disconnect terminal plate 4 is connected between the movable contact 106 and the second disconnect terminal. The bent structure can adapt to the corresponding structure of the housing, is beautiful, saves space, and is easy to install.

[0039] Further, such as Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 As shown, a groove 31 is provided on the top of the first boss 3, and the side of the circuit breaker terminal plate 4 can be snapped into the groove 31. The circuit breaker terminal plate 4 can be limited and fixed by snapping. At the same time, a convex structure is provided at the contact part between the side of the circuit breaker terminal plate 4 and the first sampling compression spring 2. The convex structure has a chamfered corner and is inserted into the groove 31 for fixation. The first sampling compression spring 2 is compressed through the groove 31 to be in a compressed state. The compressed first sampling compression spring 2 has good conductivity, which can make the down-sampling signal stable and reliable.

[0040] Further, such as Figure 1As shown, in another preferred embodiment, the circuit breaker is a two-phase line, that is, the circuit breaker includes an L pole and an N pole, and the circuit breaker includes four terminals, which are respectively used to connect the L pole and the N pole. In this case, the signal sampling structure of the circuit breaker also includes a straight-through pole module arranged in the shell, and the straight-through pole module includes a first straight-through pole terminal 102, a straight-through pole terminal board 5 and a second straight-through pole terminal (not shown in the figure) connected in sequence. The straight-through pole module refers to the terminals at both ends being directly connected through conductors, and no breakpoint is set in the middle.

[0041] The through-pole terminal plate 5 and the disconnecting pole terminal plate 4 have similar structures and are made of the same material, both of which are metal materials with good electrical conductivity, such as copper or iron.

[0042] It should be noted that, under normal circumstances, the straight-through pole module is connected to the N pole in the line, and the circuit breaker pole module is connected to the L pole in the line. In this way, since a disconnect point is provided in the circuit breaker pole module, the power supply of the L pole of the circuit breaker can be quickly cut off in the event of improper operation or an emergency, which not only prevents damage to the circuit breaker, but also avoids endangering the personal safety of the staff.

[0043] Obviously, the through-pole connection plate 5 and the disconnecting-pole connection plate 4 may also be other connection structures, for example, they may be soft wires.

[0044] In one possible implementation, Figure 1 、 Figure 3-Figure 6 As shown, a second sampling structure is also provided in the housing, which is the same as the first sampling structure and includes a second sampling compression spring 6. The second sampling compression spring 6 is elastically compressed and connected between the straight-through terminal plate 5 and the second sampling area 13 of the circuit board 1. A second boss 7 is provided on the circuit breaker base 103, and the second mounting hole 14 of the circuit board 1 is sleeved on the bottom of the second boss 7. The second sampling area 13 is arranged around the second mounting hole 14. The second sampling compression spring 6 is sleeved on the second boss 7 and is in contact with the second sampling area 13. The straight-through terminal plate 5 is clamped in the groove 71 on the top of the second boss 7.

[0045] By setting the second sampling structure, the sampling signal of the N-pole line can be obtained. Since the first sampling structure is set on the L-pole circuit breaker module, the sampling result is more accurate by setting the second sampling structure and the first sampling structure on the N-pole and L-pole of the circuit breaker respectively.

[0046] Further, such as Figure 1 As shown, a signal output terminal 104 is provided between the first through-pole terminal 102 and the first disconnecting pole terminal 101 . The signal output terminal 104 is electrically connected to the circuit board 1 and is used to connect to an external terminal device to obtain collected signal information.

[0047] Among them, the circuit board 1 is a sheet structure, the surface of which can be made of insulating material, which can achieve electrical isolation from the internal components of the circuit breaker. A connecting line is provided inside it, one end of the connecting line is connected to the first sampling area 11, and the other end is connected to the signal output end 104. The first sampling area 11 is used to receive the electrical signal in the transmission line, reduce the voltage of the electrical signal, pre-process the electrical signal, and then transmit it to the signal output end 104. Among them, the first sampling area 11 is a circular pad, and the shape of the first sampling area 11 can also be other shapes, for example, it can be a square; the second sampling area 13 is also a circular pad, and the shape of the second sampling area 13 can also be other shapes, for example, it can be a square.

[0048] In a possible implementation, the first boss 3 is disposed on a side close to the first direct-pole terminal 102 , and the second boss 7 is disposed on a side away from the first direct-pole terminal 102 .

[0049] In one possible implementation, the disconnect pole module further includes an electric operating device 108, which includes a motor and a gear set. The motor is driven by an operating mechanism 107 through the gear set, and the operating mechanism 107 is driven and connected to the movable contact 106. The electric operating device 108 can drive the movable contact 106 to close or open the static contact by controlling the operating mechanism 107. The motor is electrically connected to the circuit board 1, which is provided with a control circuit to remotely realize automatic opening and closing of the circuit breaker.

[0050] In one possible implementation, a circuit breaker protection circuit is provided on the circuit board 1. The protection circuit monitors whether the main circuit of the circuit breaker module has an overload or short-circuit fault based on the current signal and / or voltage signal collected by the first sampling structure and / or the second sampling structure. When an overload or short-circuit fault occurs, the protection circuit triggers the electromagnetic release, which pushes the operating mechanism lock to trip the operating mechanism.

[0051] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0052] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A signal sampling structure for a circuit breaker, comprising a housing, a circuit breaker module and a circuit board (1) arranged in the housing, wherein the circuit breaker module comprises a contact mechanism, a first circuit breaker terminal (101) and a second circuit breaker terminal, wherein the contact mechanism comprises a movable contact (106) and a stationary contact (105) used in conjunction with each other, wherein the movable contact (106) and the stationary contact (105) are respectively connected to the first circuit breaker terminal (101) and the second circuit breaker terminal to form a main circuit of the circuit breaker module, characterized in that: A first sampling structure is provided in the housing, comprising a conductive member connected to the main circuit of the disconnecting pole module, the conductive member and the circuit board (1) overlapping and spaced apart in the thickness direction of the housing, a first sampling area (11) being provided on the circuit board (1) at a position corresponding to the conductive member, and a first sampling compression spring (2) being elastically compressed and connected between the conductive member and the first sampling area (11) of the circuit board (1).

2. The signal sampling structure of the circuit breaker according to claim 1, characterized in that: The housing comprises a circuit breaker base (103) and an upper cover, wherein the upper cover is covered on the circuit breaker base (103) along the thickness direction of the housing, and a first boss (3) of a columnar structure is provided on the circuit breaker base (103) along the thickness direction of the housing, the circuit board (1) comprises a first mounting hole (12), the first sampling area (11) is arranged around the first mounting hole (12), the circuit board (1) is installed in the circuit breaker base (103), and the first mounting hole (12) is sleeved on the bottom of the first boss (3), and the first sampling compression spring (2) is sleeved on the first boss (3) and is in contact with and connected to the first sampling area (11).

3. The signal sampling structure of the circuit breaker according to claim 2, characterized in that: It comprises a disconnecting pole connection plate (4) connected in series in the main circuit of the disconnecting pole module, and the conductive part is the disconnecting pole connection plate (4).

4. The signal sampling structure of the circuit breaker according to claim 3, characterized in that: A groove (31) is provided on the top of the first boss (3), and the disconnecting pole terminal plate (4) is clamped in the groove (31).

5. The signal sampling structure of a circuit breaker according to any one of claims 2 to 4, characterized in that: It also includes a through-pole module arranged in the shell, and the through-pole module includes a first through-pole terminal (102), a through-pole terminal plate (5), and a second through-pole terminal connected in sequence.

6. The signal sampling structure of the circuit breaker according to claim 5, characterized in that: A second sampling structure is also provided in the housing, the second sampling structure comprising a second sampling compression spring (6), the second sampling compression spring (6) being elastically compressed and connected between the through-pole terminal plate (5) and the second sampling area (13) of the circuit board (1), a second boss (7) being provided on the circuit breaker base (103), a second mounting hole (14) of the circuit board (1) being sleeved on the bottom of the second boss (7), the second sampling area (13) being arranged around the second mounting hole (14), the second sampling compression spring (6) being sleeved on the second boss (7) and being in contact with the second sampling area (13), and the through-pole terminal plate (5) being snap-fitted into a groove at the top of the second boss (7).

7. The signal sampling structure of the circuit breaker according to claim 6, characterized in that: A signal output terminal (104) is provided between the first through-pole terminal (102) and the first disconnecting pole terminal (101), and the signal output terminal (104) is electrically connected to the circuit board (1).

8. The signal sampling structure of the circuit breaker according to claim 7, characterized in that: The disconnecting pole module further comprises an operating member (109) and an operating mechanism (107), wherein the operating member (109) is connected to the operating mechanism (107), and the operating mechanism (107) is drive-connected to the moving contact (106), wherein the operating member (109), the second straight-through pole terminal and the second disconnecting pole terminal are all arranged at one end in the length direction of the housing, and the first straight-through pole terminal (102), the first disconnecting pole terminal (101) and the signal output terminal (104) are all arranged at one end in the length direction of the housing.

9. The signal sampling structure of the circuit breaker according to claim 6, characterized in that: The first sampling area (11) and the second sampling area (13) are circular ring-shaped pads.

10. The signal sampling structure of the circuit breaker according to claim 8, characterized in that: The circuit board (1) is provided with a circuit breaker protection circuit, the protection circuit monitoring whether the main circuit of the circuit breaker module has an overload or short circuit fault based on the current signal and / or voltage signal collected by the first sampling structure and / or the second sampling structure; and / or the circuit breaker module further includes an electric operating device (108), the electric operating device (108) includes a motor and a gear set, the motor is driven and matched with the operating mechanism (107) through the gear set, the motor is electrically connected to the circuit board (1), and the circuit board (1) is provided with a control circuit for automatic opening and closing control.

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