Circuit breaker assembly

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a circuit breaker assembly. The circuit breaker assembly comprises a circuit breaker body, wherein the circuit breaker body comprises a first wiring terminal; the arc extinction maintenance switch is arranged on the outer side of the circuit breaker body, the arc extinction maintenance switch comprises a second wiring terminal and an arc extinction maintenance control piece with an opening control position and a closing control position, and the arc extinction maintenance control piece is electrically connected with the first wiring terminal through the second wiring terminal; and when the arc extinction maintenance control piece is in the open control potential, the short-circuit instantaneous action current value of the circuit breaker body can be reduced, and arc energy release of fault current is reduced. According to the utility model, breaking time can be shortened, electric arc harm of a power grid is reduced, safety of operators is ensured, and damage risk of electrical equipment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field especially relates to circuit breaker assembly. BACKGROUND

[0002] Circuit breaker is a kind of mechanical switch electrical apparatus that can be connected, carried and disconnected under the current of normal circuit condition, and can be connected, carried for a certain time and disconnected under the current of stipulated abnormal circuit (such as short circuit). Circuit breaker is the switch electrical apparatus mainly playing the role of protection in low-voltage distribution network, and circuit breaker provides overload and short-circuit protection for line. Plastic housing type circuit breaker is one of them, and large-capacity molded case circuit breaker refers to the circuit breaker with rated current reaching or exceeding 800A.

[0003] In some application scenarios, if the rated or adjustable maximum continuous current trip setting of the actual overcurrent device installed in the circuit breaker is 1200A or higher, corresponding measures need to be taken to reduce the breaking time, otherwise it is easy to cause arc hazard of power grid and personal safety. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of circuit breaker assembly, reduces breaking time, reduces arc hazard of power grid, guarantees the safety of operator, reduces the damage risk of electrical equipment.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Circuit breaker assembly, comprising:

[0007] Circuit breaker body, the circuit breaker body includes first terminal;

[0008] Arc extinguishing maintenance switch is arranged on the outside of the circuit breaker body, the arc extinguishing maintenance switch includes second terminal and arc extinguishing maintenance control piece with opening control position and closing control position, the arc extinguishing maintenance control piece is electrically connected with the first terminal by the second terminal, and the arc extinguishing maintenance control piece can reduce the short-circuit transient action current value of the circuit breaker body in the opening control position.

[0009] As optional scheme of circuit breaker assembly, the arc extinguishing maintenance switch further includes:

[0010] Protection unit includes cover and shell that mutually buckle, the cover and the shell surround and form containing cavity, the arc extinguishing maintenance control piece is rotationally arranged on the cover, and the second terminal is arranged on the shell;

[0011] First switching circuit board is arranged in the containing cavity, and the second terminal and the arc extinguishing maintenance control piece are electrically connected with the first switching circuit board.

[0012] As an optional solution of the circuit breaker assembly, a plurality of first connecting holes are arranged on the shell, a plurality of second connecting holes are arranged on the cover body, and the arc extinguishing maintenance switch further comprises:

[0013] First fasteners, which are connected through the first connecting holes and the second connecting holes.

[0014] As an optional solution of the circuit breaker assembly, a plurality of mounting columns are arranged on the inner circumferential surface of the shell, a third connecting hole is arranged on each mounting column, a plurality of fourth connecting holes are arranged on the first adapter circuit board, and the arc extinguishing maintenance switch further comprises:

[0015] Second fasteners, which are connected through the fourth connecting holes and the third connecting holes.

[0016] As an optional solution of the circuit breaker assembly, the arc extinguishing maintenance switch further comprises a high-voltage power input end and a low-voltage power input end, and the high-voltage power input end and the low-voltage power input end are electrically connected with the first adapter circuit board.

[0017] As an optional solution of the circuit breaker assembly, the arc extinguishing maintenance switch further comprises:

[0018] A power indicator light arranged on the cover body and electrically connected with the first adapter circuit board, and / or a state indicator light arranged on the cover body and electrically connected with the first adapter circuit board, which is used to indicate that the arc extinguishing maintenance control is in the open control position or the closed control position.

[0019] As an optional solution of the circuit breaker assembly, the arc extinguishing maintenance switch further comprises:

[0020] A plurality of mounting buckles arranged on the outer wall surface of the cover body, one end of the mounting buckle is provided with a plug-in part, and the plug-in part is used to plug in with the cabinet door of the power distribution cabinet.

[0021] As an optional solution of the circuit breaker assembly, the inner wall surface of the mounting buckle is provided with a strip-shaped protruding part, the outer wall surface of the cover body is provided with a strip-shaped groove, and the strip-shaped protruding part is located in the strip-shaped groove; and / or the inner wall surface of the plug-in part is provided with a first one-way rack part, the outer wall surface of the cover body is provided with a second one-way rack part, the first one-way rack part is engaged with the second one-way rack part, the mounting buckle can move on the cover body in a direction away from the shell, and the cabinet door with different thicknesses can be installed.

[0022] As an optional solution of the circuit breaker assembly, the arc extinguishing maintenance switch further comprises:

[0023] The protection unit comprises a first protection cover and a second protection cover which are hingedly connected to each other, the first protection cover is connected to the cover body, and the first protection cover and the second protection cover surround to form a receiving cavity, and the arc-extinguishing maintenance control member is located in the receiving cavity.

[0024] As an optional solution of the circuit breaker assembly, the circuit breaker assembly further comprises a neutral mutual inductor arranged outside the circuit breaker body, the neutral mutual inductor comprises a third wiring terminal, and the circuit breaker body further comprises:

[0025] The arc-extinguishing maintenance switch is arranged outside the shell;

[0026] The second adapter circuit board is fixedly arranged inside the shell, the first wiring terminal, the fourth wiring terminal and the fifth wiring terminal are arranged on the second adapter circuit board respectively, and the first wiring terminal and the fourth wiring terminal are exposed outside the shell, and the third wiring terminal is electrically connected with the fourth wiring terminal, so that the ground current signal collected by the neutral mutual inductor is conducted to the second adapter circuit board.

[0027] The controller is arranged in the shell and is in communication connection with the fifth wiring terminal.

[0028] Compared with the prior art, the circuit breaker assembly has the following beneficial effects:

[0029] The circuit breaker assembly has the advantages that the circuit breaker body and the arc-extinguishing maintenance switch are arranged separately, the structure is simple, the volume is small, and the cost is low. When the arc-extinguishing maintenance control member is in the open control position, the short-circuit transient action current value of the circuit breaker body is reduced to less than eight times of the rated working current, and the current of the short-circuit current is limited, so that the allowed energy of the arc generated between the moving contact and the static contact is reduced, the arc energy is greatly reduced and limited, and the breaking time is reduced in the mode of reducing the short-circuit transient action current value. The arc-extinguishing maintenance function is especially applied to the scene of maintenance of the lower branch of the main circuit breaker or the scene of manual breaking operation of the lower branch, and the arc hazard of the power grid is effectively reduced and the personal safety is protected. When the arc-extinguishing maintenance control member is in the closed control position, the short-circuit transient action current value of the circuit breaker body is a preset value, and the preset value is greater than or equal to eight times of the rated working current. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the circuit breaker assembly in the embodiment of the utility model (connection wires are not shown);

[0031] Figure 2 is a structural schematic view of the arc-extinguishing maintenance switch in the first perspective in the embodiment of the utility model;

[0032] Figure 3 is a structure schematic view of the second visual angle of the arc-extinguishing maintenance switch in the embodiment of the utility model;

[0033] Figure 4 is the explosion schematic view of the arc-extinguishing maintenance switch in the embodiment of the utility model;

[0034] Figure 5 is the structure schematic view of the cover in the embodiment of the utility model;

[0035] Figure 6 is the structure schematic view of the mounting buckle in the embodiment of the utility model;

[0036] Figure 7 is the structure schematic view of the circuit breaker body in the embodiment of the utility model;

[0037] Figure 8 is the structure schematic view of the second switching circuit board in the embodiment of the utility model.

[0038] In the drawing:

[0039] 1, circuit breaker body; 2, arc-extinguishing maintenance switch;

[0040] 11, first wiring terminal; 12, shell; 13, second switching circuit board; 14, fourth wiring terminal; 15, fifth wiring terminal;

[0041] 21, second wiring terminal; 22, arc-extinguishing maintenance control; 23, cover; 231, second connecting hole; 232, strip-shaped recess; 233, second one-way rack part; 24, shell; 241, first connecting hole; 242, mounting column; 2421, third connecting hole; 25, first switching circuit board; 251, fourth connecting hole; 26, first fastener; 27, second fastener; 28, high-voltage power input end; 29, low-voltage power input end; 210, power indicator lamp; 211, state indicator lamp; 212, mounting buckle; 2121, plug-in part; 21211, first one-way rack part; 2122, strip-shaped protruding part; 213, protection unit; 2131, first protection cover; 2132, second protection cover; 214, gasket. DETAILED DESCRIPTION

[0042] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limited to the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all the structures.

[0043] In the description of the utility model, unless another definite provision and limitation, the term "connect", "connection", "fixed" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation.For the ordinary skill in the art, the above-mentioned terms can be understood in the utility model according to the specific meaning of the specific circumstances.

[0044] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.

[0045] In the description of the embodiment, the term "on", "under", "right", etc.Orientation or position relationship is based on the orientation or position relationship shown in the drawing, just for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0046] In order to reduce the breaking time, reduce the arc hazard of power grid, ensure personal safety, the embodiment provides a circuit breaker assembly, which is described below Figures 1 to 8 The specific content of the embodiment is described in detail.The circuit breaker body can be a molded case circuit breaker, and the short-circuit transient protection action value of the molded case circuit breaker is 8-12 times of the rated current, and the circuit breaker body is the common circuit breaker structure in the prior art, which will not be described in detail here.

[0047] As Figures 1 to 6As shown, the circuit breaker assembly in the embodiment includes a circuit breaker body 1 and an arc extinction maintenance switch 2, wherein the circuit breaker body 1 includes a first wiring terminal 11. The arc extinction maintenance switch 2 is arranged outside the circuit breaker body 1, and the arc extinction maintenance switch 2 includes a second wiring terminal 21 and an arc extinction maintenance control 22 having an open control position and a close control position. The arc extinction maintenance control 22 is electrically connected to the first wiring terminal 11 through the second wiring terminal 21. When the arc extinction maintenance control 22 is in the open control position, the short-circuit instantaneous action current value of the circuit breaker body 1 is less than eight times of the rated working current, and the arc energy release of the fault current is reduced. Specifically, the arc extinction maintenance control 22 is configured such that, when the arc extinction maintenance control 22 is in the open control position, the short-circuit instantaneous action current value of the circuit breaker body 1 is less than eight times of the rated working current, and when the arc extinction maintenance control 22 is in the close control position, the short-circuit instantaneous action current value of the circuit breaker body 1 is a preset value, which is greater than or equal to eight times of the rated working current. For example, the short-circuit instantaneous protection action value of the circuit breaker body 1 in the normal working state is 8-12 times of the rated current, and when the circuit breaker body 1 enters the arc extinction maintenance mode, the short-circuit instantaneous action current value of the circuit breaker body 1 is twice the rated working current.

[0048] The circuit breaker assembly provided in the embodiment has the advantages of simple structure, small size and low cost by arranging the circuit breaker body 1 and the arc extinction maintenance switch 2 separately. When the arc extinction maintenance control 22 is in the open control position, the short-circuit instantaneous action current value of the circuit breaker body 1 is less than eight times of the rated working current, and the current of the short-circuit current is limited, which can reduce the allowed energy of the arc generated between the moving contact and the static contact, greatly reduce and limit the arc energy, and reduce the breaking time by reducing the short-circuit instantaneous action current value. The arc extinction maintenance function is particularly applied to the scene of maintenance of the sub-branch of the main circuit breaker or the scene of manual breaking operation of the sub-branch, which can effectively reduce the arc hazard of the power grid and protect personal safety. When the arc extinction maintenance control 22 is in the close control position, the short-circuit instantaneous action current value of the circuit breaker body 1 is a preset value, which is greater than or equal to eight times of the rated working current.

[0049] Further, as shown in Figures 3 to 6 The arc extinction maintenance switch 2 further includes a protection unit and a first switching circuit board 25. The protection unit includes a cover 23 and a shell 24 which are buckled to each other and form a containing cavity. The arc extinction maintenance control 22 is rotationally arranged on the cover 23, and the second wiring terminal 21 is arranged on the shell 24. The first switching circuit board 25 is arranged in the containing cavity, and the second wiring terminal 21 and the arc extinction maintenance control 22 are electrically connected to the first switching circuit board 25. The protection unit is used for protecting and mounting the first switching circuit board 25 and the arc extinction maintenance control 22.

[0050] Further, the shell 24 is provided with a plurality of first connecting holes 241, and the cover 23 is provided with a plurality of second connecting holes 231. The arc-extinguishing maintenance switch 2 further comprises a first fastener 26, which is connected through the first connecting holes 241 and the second connecting holes 231. The first fastener 26 is used to connect the cover 23 and the shell 24, so as to ensure the stability of the connection between the cover 23 and the shell 24.

[0051] Further, the shell 24 is provided with a plurality of first connecting holes 241, and the cover 23 is provided with a plurality of second connecting holes 231. The arc-extinguishing maintenance switch 2 further comprises a first fastener 26, which is connected through the first connecting holes 241 and the second connecting holes 231. The first fastener 26 is used to connect the cover 23 and the shell 24, so as to ensure the stability of the connection between the cover 23 and the shell 24.

[0052] Further, the arc-extinguishing maintenance switch 2 further comprises a protection unit 213, which comprises a first protection cover 2131 and a second protection cover 2132 that are hingedly connected to each other. The first protection cover 2131 is connected to the cover 23, and the first protection cover 2131 and the second protection cover 2132 form a receiving cavity. The arc-extinguishing maintenance control 22 is located in the receiving cavity. When maintenance operation is needed, the second protection cover 2132 is opened, and after the operation is completed, the second protection cover 2132 is closed, so as to avoid that other people mistakenly operate the arc-extinguishing maintenance control 22.

[0053] Further, the arc-extinguishing maintenance switch 2 further comprises a high-voltage power input end 28 and a low-voltage power input end 29, which are electrically connected to the first adapter circuit board 25. The high-voltage power input end 28 and the low-voltage power input end 29 are used to make the first adapter circuit board 25 meet two power supply modes of high voltage and low voltage, so as to expand the power application range of the arc-extinguishing maintenance switch 2.

[0054] Further, the arc-extinguishing maintenance switch 2 further comprises a power indicator 210, which is arranged on the cover 23 and electrically connected with the first adapter circuit board 25; and / or the arc-extinguishing maintenance switch 2 further comprises a state indicator 211, which is arranged on the cover 23 and electrically connected with the first adapter circuit board 25, and is used for indicating that the arc-extinguishing maintenance control 22 is in the open control position or the closed control position. When the arc-extinguishing maintenance switch 2 is connected to the power supply, the power indicator 210 is always on. When the arc-extinguishing maintenance switch 2 is rotated to the closed control position, the state indicator 211 is turned off. When the second protective cover 2132 of the arc-extinguishing maintenance switch 2 is opened, the arc-extinguishing maintenance control 22 is turned to the open control position, the state indicator 211 is turned on, the circuit breaker body 1 enters the arc-extinguishing maintenance mode, and the short-circuit transient action current is reduced to 2 times the rated working current. After the maintenance and operation of the lower branch circuit line are completed, the arc-extinguishing maintenance switch 2 is turned back to the closed control position, and the circuit breaker body 1 cooperating therewith returns to the normal working state.

[0055] Further, the arc-extinguishing maintenance switch 2 further comprises a plurality of mounting buckles 212, which are arranged on the outer wall surface of the cover 23, and one end of each of the mounting buckles 212 is provided with a plug-in part 2121, which is used for plugging with the cabinet door of the power distribution cabinet. By arranging the mounting buckles 212 on the four corners of the outer wall surface of the cover 23, the plug-in parts 2121 on the mounting buckles 212 are used to facilitate the overall assembly of the arc-extinguishing maintenance switch 2 on the cabinet door of the power distribution cabinet, and the maintenance personnel can adjust the short-circuit transient action current value of the circuit breaker body 1 by controlling the arc-extinguishing maintenance switch 2. Optionally, the arc-extinguishing maintenance switch 2 further comprises a gasket 214, which is clamped between the contact surface of the cover 23 and the cabinet door, so as to ensure the close contact of the contact surface of the two, and avoid the penetration of rainwater into the power distribution cabinet.

[0056] Further, the inner wall surface of the mounting buckle 212 is provided with a strip-shaped protruding portion 2122, the outer wall surface of the cover body 23 is provided with a strip-shaped groove 232, and the strip-shaped protruding portion 2122 is located in the strip-shaped groove 232; and / or the inner wall surface of the plug-in portion 2121 is provided with a first one-way rack portion 21211, the outer wall surface of the cover body 23 is provided with a second one-way rack portion 233, the first one-way rack portion 21211 is engaged with the second one-way rack portion 233, and the mounting buckle 212 can move on the cover body 23 in a direction away from the shell 24, so as to realize the installation of cabinet doors with different thicknesses. By additionally providing the strip-shaped protruding portion 2122 and the strip-shaped groove 232, on the one hand, the contact limiting area of the mounting buckle 212 and the outer wall surface of the cover body 23 is increased, which helps to improve the assembly firmness of the mounting buckle 212 and the cover body 23, and on the other hand, the adjustment movement of the mounting buckle 212 on the cover body 23 can be guided. By additionally providing the first one-way rack portion 21211 and the second one-way rack portion 233, not only can the position of the mounting buckle 212 on the cover body 23 be adjusted, so that the thickness size of the arc extinguishing and maintenance switch 2 meets the installation requirements, but also the mounting buckle 212 can be prevented from falling off the cover body 23.

[0057] Further, as shown in Figure 7 In combination Figure 8 As shown, the circuit breaker assembly further includes a neutral mutual inductor (not shown in the figure) arranged outside the circuit breaker body 1, the neutral mutual inductor includes a third wiring terminal, and the circuit breaker body 1 further includes a shell 12, a second switching circuit board 13 and a controller. The arc extinguishing and maintenance switch 2 is arranged outside the shell 12. The second switching circuit board 13 is fixedly arranged inside the shell 12, and the second switching circuit board 13 is respectively provided with the first wiring terminal 11, a fourth wiring terminal 14 and a fifth wiring terminal 15, and the first wiring terminal 11 and the fourth wiring terminal 14 are exposed outside the shell 12. The third wiring terminal is electrically connected with the fourth wiring terminal 14, so that the ground current signal collected by the neutral mutual inductor is conducted to the second switching circuit board 13. The controller is arranged in the shell 12 and is in communication connection with the fifth wiring terminal 15, on the one hand, so that the controller can analyze and judge the ground current signal according to a preset program, thereby being able to find out the ground fault in real time and ensuring the use safety of the entire circuit breaker body 1; on the other hand, so that the control signal of the arc extinguishing and maintenance control piece 22 of the arc extinguishing and maintenance switch 2 is transmitted to the controller, thereby being convenient for reducing the short-circuit transient action current value of the circuit breaker body 1 to less than eight times of the rated working current.

[0058] Optionally, the circuit breaker assembly further includes a connecting wire, a first end of the connecting wire is plugged with the first wiring terminal 11 and the third wiring terminal, and a second end of the connecting wire is plugged with the second wiring terminal 21 and the fourth wiring terminal 14. The second switching circuit board 13 is provided with a mounting hole, thereby being convenient for mounting and fixing the second switching circuit board 13 into the shell 12.

[0059] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A circuit breaker assembly characterized by, The circuit breaker body (1) comprises a first wiring terminal (11). The arc extinction maintenance switch (2) is arranged outside the circuit breaker body (1), and comprises a second wiring terminal (21) and an arc extinction maintenance control (22) having an open control position and a close control position. The arc extinction maintenance control (22) is electrically connected with the first wiring terminal (11) through the second wiring terminal (21), and the arc extinction maintenance control (22) in the open control position can reduce the short-circuit instantaneous operating current value of the circuit breaker body (1). The arc extinction maintenance switch (2) further comprises:

2. The circuit breaker assembly of claim 1, wherein, A protection unit comprising a cover (23) and a shell (24) that are buckled to each other, the cover (23) and the shell (24) form an accommodation cavity, the arc extinction maintenance control (22) is rotationally arranged on the cover (23), and the second wiring terminal (21) is arranged on the shell (24); A first adapter circuit board (25) arranged in the accommodation cavity, and the second wiring terminal (21) and the arc extinction maintenance control (22) are electrically connected with the first adapter circuit board (25). The shell (24) is provided with a plurality of first connecting holes (241), and the cover (23) is provided with a plurality of second connecting holes (231), and the arc extinction maintenance switch (2) further comprises:

3. The circuit breaker assembly of claim 2, wherein, A first fastener (26) connected through the first connecting hole (241) and the second connecting hole (231). The shell (24) is provided with a plurality of mounting columns (242) arranged at intervals in the circumferential direction, each mounting column (242) is provided with a third connecting hole (2421), and the first adapter circuit board (25) is provided with a plurality of fourth connecting holes (251), and the arc extinction maintenance switch (2) further comprises:

4. The circuit breaker assembly of claim 2, wherein, A second fastener (27) connected through the fourth connecting hole (251) and the third connecting hole (2421). The arc extinction maintenance switch (2) further comprises a high-voltage power input end (28) and a low-voltage power input end (29), and the high-voltage power input end (28) and the low-voltage power input end (29) are electrically connected with the first adapter circuit board (25).

5. The circuit breaker assembly of claim 2, wherein, The arc extinction maintenance switch (2) further comprises:

6. The circuit breaker assembly of claim 5, wherein, A power indicator (210) arranged on the cover (23) and electrically connected with the first adapter circuit board (25); and / or A state indicator (211) arranged on the cover (23) and electrically connected with the first adapter circuit board (25), and the state indicator (211) is used for indicating that the arc extinction maintenance control (22) is in the open control position or the close control position. The arc extinction maintenance switch (2) further comprises:

7. The circuit breaker assembly of claim 2, wherein, ​ A plurality of mounting buckles (212) are arranged on the outer wall surface of the cover (23), one end of the mounting buckle (212) is provided with a plug-in part (2121) for plugging with the cabinet door of the power distribution cabinet.

8. The circuit breaker assembly of claim 7, wherein, The inner wall surface of the mounting buckle (212) is provided with a strip-shaped protruding part (2122), the outer wall surface of the cover (23) is provided with a strip-shaped groove (232), and the strip-shaped protruding part (2122) is located in the strip-shaped groove (232); and / or The inner wall surface of the plug-in part (2121) is provided with a first one-way rack part (21211), the outer wall surface of the cover (23) is provided with a second one-way rack part (233), the first one-way rack part (21211) is engaged with the second one-way rack part (233), and the mounting buckle (212) can move on the cover (23) in a direction away from the shell (24).

9. The circuit breaker assembly of claim 3, wherein, The arc-extinguishing maintenance switch (2) further comprises: A protection unit (213) comprising a first protection cover (2131) and a second protection cover (2132) hinged to each other, the first protection cover (2131) is connected with the cover (23), and the first protection cover (2131) and the second protection cover (2132) form a receiving cavity, and the arc-extinguishing maintenance control member (22) is located in the receiving cavity.

10. The circuit breaker assembly of any one of claims 1-9, wherein, The circuit breaker assembly further comprises a neutral mutual inductor arranged outside the circuit breaker body (1), the neutral mutual inductor comprises a third wiring terminal, and the circuit breaker body (1) further comprises: An outer shell (12), the arc-extinguishing maintenance switch (2) is arranged outside the outer shell (12); A second adapter circuit board (13) is fixedly arranged inside the outer shell (12), the second adapter circuit board (13) is provided with the first wiring terminal (11), a fourth wiring terminal (14) and a fifth wiring terminal (15) respectively, and the first wiring terminal (11) and the fourth wiring terminal (14) are exposed outside the outer shell (12), the third wiring terminal is electrically connected with the fourth wiring terminal (14), so that the ground current signal collected by the neutral mutual inductor is conducted to the second adapter circuit board (13); A controller is arranged in the outer shell (12) and is in communication connection with the fifth wiring terminal (15).

Images