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 and an accessory, the circuit breaker comprises a housing, the housing is provided with a limiting chute, the side wall of the limiting chute is provided with a limiting groove, and the bottom end of the limiting chute along a first direction is provided with a limiting clamping groove; the accessory is provided with an inserting part, limiting protrusions are arranged on the peripheral side of the inserting part, and a limiting buckle is arranged at the bottom end, in the first direction, of the inserting part; wherein the inserting part is inserted into the limiting sliding groove in the first direction, the limiting protrusion is arranged in the limiting groove, and the limiting buckle is connected with the limiting clamping groove in a clamped mode. According to the circuit breaker assembly provided by the utility model, the connection between the accessory and the shell is stable, and the accessory is inserted into the shell of the circuit breaker along the first direction, so that the accessory can be conveniently assembled on the circuit breaker.

Description

Technical Field

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

[0002] Molded case circuit breakers are important electrical equipment for protecting circuit systems. When short circuits, overloads, undervoltage and other faults occur in the circuit, the circuit breakers will actively cut off the current, thereby protecting the power distribution system, electrical equipment and the safety of staff. However, in actual use, the insulation level between phases of the circuit breaker will be affected by the working environment, especially when it is contaminated by particulate matter after breaking or in a humid and hot environment. The insulation level between phases of the circuit breaker will be greatly weakened, which may cause secondary short circuits and phase breakdown of the circuit breaker, resulting in failure of fault current breaking and burning of electrical equipment. With the development of the new energy market, the market has higher and higher requirements for the breaking capacity of circuit breakers. In the breaking parameters of high voltage and high current, the creepage distance and electrical clearance between phases are issues that designers cannot ignore.

[0003] At present, in order to increase the creepage distance and electrical clearance between phases, accessories are usually installed on the circuit breaker, including terminal shields and phase partitions. Figure 1 As shown, after the traditional terminal cover 10 and the circuit breaker 20 are installed, they need to be fixed by screws 11, which makes assembly troublesome; the traditional phase partition 30 is plugged into the circuit breaker 20, and is positioned and assembled with the circuit breaker 20 by the protrusion 31, which has the risk of falling off. Utility Model Content

[0004] The utility model aims to provide a circuit breaker assembly, the accessories of which are easy to assemble and have stable connections.

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

[0006] A circuit breaker assembly is provided, comprising:

[0007] The circuit breaker comprises a housing, wherein the housing is provided with a limiting slide groove, a side wall of the limiting slide groove is provided with a limiting groove, and a limiting card groove is provided at the bottom end of the limiting slide groove along a first direction;

[0008] The accessory is provided with a plug-in portion, a limiting protrusion is provided on the peripheral side of the plug-in portion, and a limiting buckle is provided at the bottom end of the plug-in portion along the first direction; wherein,

[0009] The plug-in portion is plugged into the limiting sliding groove along a first direction, and the limiting protrusion is placed in the limiting groove, and the limiting buckle is engaged with the limiting groove.

[0010] Optionally, the accessory includes a terminal cover, a partition plate is provided inside the terminal cover, and the plug-in portion is provided on the partition plate.

[0011] Optionally, the terminal cover includes two side plates arranged opposite to each other along the second direction, a limiting portion is provided at the end of the side plate along the third direction, the limiting portion includes a baffle extending along the first direction, a convex strip extending along the first direction is provided on the inner side of the baffle, a first limiting groove corresponding to the convex strip is provided on the outer shell, the first end of the outer shell along the third direction is arranged between the two baffles, and the convex strip is placed in the corresponding first limiting groove.

[0012] Optionally, the housing is provided with first clearance grooves on both sides along the second direction, respectively, the first limiting grooves are provided in the first clearance grooves, and the blocking bars are placed in the corresponding first clearance grooves.

[0013] Optionally, the limiting portion also includes a limiting strip extending along the first direction, the limiting strip is located on the inner side of the blocking strip, a boss is provided at the end of the limiting strip along the third direction, a second limiting groove corresponding to the limiting strip one by one is provided on the outer shell, a positioning groove is provided in the second limiting groove, the limiting strip is inserted into the corresponding second limiting groove along the first direction, and the boss is placed in the corresponding positioning groove.

[0014] Optionally, the limiting protrusion includes:

[0015] A first protrusion is provided at the top end of the plug-in portion along the first direction, and at least two first protrusions are provided at intervals along the third direction;

[0016] The second protrusion is arranged at the bottom end of the plug-in portion along the first direction.

[0017] Optionally, the plug-in portion is provided with an extrusion protrusion between two adjacent first protrusions, and the extrusion protrusion is abutted against a side wall of the limiting sliding groove.

[0018] Optionally, the bottom end of the extrusion protrusion along the first direction is provided with an inclined end surface.

[0019] Optionally, the limiting buckle includes two undercuts arranged opposite to each other along the second direction, and a gap is formed between the two undercuts.

[0020] Optionally, the limiting slide groove includes a closing portion, the closing portion is located at the bottom end of the limiting slide groove along the first direction, and the limiting slot is provided at the bottom end of the closing portion along the first direction.

[0021] Beneficial effects: The circuit breaker assembly provided by the utility model has a plug-in portion plugged into the limiting slide groove along the first direction, and the limiting protrusion is placed in the limiting groove, so that the position of the accessory is fixed relative to the housing in a plane perpendicular to the first direction, and the limiting buckle is engaged with the limiting groove to form an interlock, so that the position of the accessory is fixed relative to the housing in the first direction, thereby making the connection between the accessory and the housing stable. In addition, the accessory is plugged into the housing of the circuit breaker along the first direction, which facilitates the assembly of the accessory on the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of a circuit breaker assembly provided by the prior art;

[0023] Figure 2 It is an exploded view of the circuit breaker assembly provided by the utility model;

[0024] Figure 3 It is a structural schematic diagram of the circuit breaker provided by the utility model;

[0025] Figure 4 The utility model provides Figure 3 A magnified view of the structure at E in the middle;

[0026] Figure 5 It is a partial cross-sectional view of the terminal cover provided by the utility model;

[0027] Figure 6 The utility model provides Figure 5 A magnified view of the structure at F in the middle;

[0028] Figure 7 It is a cross-sectional view of the terminal cover provided by the utility model;

[0029] Figure 8 It is a structural schematic diagram of the phase partition provided by the utility model;

[0030] Fig. 9 The utility model provides Figure 8 A magnified view of the structure at M in the middle;

[0031] Fig.10 It is a partial schematic diagram of the attachment provided by the utility model;

[0032] Fig.11 The utility model provides Figure 8 A magnified view of the structure at N in the middle;

[0033] Fig.12 is a cross-sectional view of a circuit breaker assembly provided by the utility model;

[0034] Fig.13 The utility model provides Fig.12 A magnified view of the structure at G in the middle;

[0035] Fig.14 It is a partial cross-sectional view of the housing provided by the utility model at the bottom end of the limiting slide groove;

[0036] Fig.15 It is a partial cross-sectional view of the attachment provided by the utility model.

[0037] In the figure:

[0038] 10. Terminal cover; 11. Screw; 20. Circuit breaker; 30. Phase partition; 31. Bump;

[0039] 100, housing; 101, limiting slide groove; 1011, closing portion; 1012, transition slope; 102, limiting groove; 103, limiting slot; 104, first limiting slot; 105, first yielding slot; 106, second limiting slot; 107, positioning slot; 110, base; 120, middle cover;

[0040] 200, accessory; 210, plug-in portion; 220, limiting protrusion; 221, first protrusion; 2211, first protrusion portion; 222, second protrusion; 2221, second protrusion portion; 230, limiting buckle; 231, undercut; 2311, connecting arm; 2312, hook; 2313, second clearance groove; 240, extrusion protrusion; 241, extrusion protrusion portion; 2411, inclined end surface;

[0041] 300, terminal cover; 301, exhaust hole; 310, partition plate; 320, side plate; 321, stop bar; 3211, convex bar; 322, limit bar; 3221, convex column;

[0042] 400, phase partition;

[0043] 500. Wiring copper busbar. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] Reference Figures 2 to 15 As shown, this embodiment provides a circuit breaker assembly, which includes a circuit breaker and an accessory 200 .

[0049] Specifically, the circuit breaker includes a housing 100, a limiting slide 101 is provided on the housing 100, a limiting groove 102 is provided on the side wall of the limiting slide 101, and a limiting card slot 103 is provided at the bottom of the limiting slide 101 along the first direction; the accessory 200 is provided with a plug-in portion 210, a limiting protrusion 220 is provided on the peripheral side of the plug-in portion 210, and a limiting buckle 230 is provided at the bottom of the plug-in portion 210 along the first direction; wherein the plug-in portion 210 is plugged into the limiting slide 101 along the first direction, and the limiting protrusion 220 is placed in the limiting groove 102, and the limiting buckle 230 is engaged with the limiting card slot 103. wherein, the a direction in the figure is the first direction, and the first direction is the height direction of the circuit breaker.

[0050] In this embodiment, the plug-in portion 210 is plugged into the limiting slide groove 101 along the first direction, and the limiting protrusion 220 is placed in the limiting groove 102, so that the position of the accessory 200 is fixed relative to the housing 100 in the plane perpendicular to the first direction. The limiting buckle 230 is engaged with the limiting groove 103 to form an interlock, so that the position of the accessory 200 is fixed relative to the housing 100 in the first direction, thereby making the connection between the accessory 200 and the housing 100 stable, and preventing the accessory 200 from falling off and the operator from pulling it out by mistake. In addition, the accessory 200 is plugged into the housing 100 of the circuit breaker along the first direction, which facilitates the assembly of the accessory 200 on the circuit breaker. Among them, the b direction in the figure is the second direction, and the c direction is the third direction. The first direction, the second direction and the third direction are perpendicular to each other, the second direction is the width direction of the circuit breaker, and the third direction is the length direction of the circuit breaker. The plane perpendicular to the first direction is the plane where the b direction and the c direction are located.

[0051] In this embodiment, refer to Figure 2 and Figure 3 As shown, the housing 100 includes a base 110 and a middle cover 120 disposed on the base 110 , the limiting slide groove 101 extends from the top of the middle cover 120 to the bottom of the base 110 , and the limiting card slot 103 is located at the bottom of the base 110 .

[0052] Specifically, the accessory 200 includes a terminal cover 300 and a phase barrier 400 .

[0053] In this embodiment, refer to Figure 2 , Figure 3 , Figures 5 to 7 As shown, a partition plate 310 is provided inside the terminal cover 300, and a plug-in portion 210 is provided on the partition plate 310. In this embodiment, the terminal cover 300 and the phase partition plate 400 can increase the creepage distance and electrical clearance between phases to prevent short circuit between phases, and the plug-in portion 210 is provided on the partition plate 310 to ensure that the connection between the terminal cover 300 and the housing 100 is stable.

[0054] Exemplarily, the terminal cover 300 is provided at the first end of the housing 100 along the third direction, and the phase partition 400 is provided at the second end of the housing 100 along the third direction. The first end of the housing 100 along the third direction is provided with a limiting slide groove 101 corresponding to the terminal cover 300, and the second end of the housing 100 along the third direction is provided with a limiting slide groove 101 corresponding to the phase partition 400. In this embodiment, at the first end of the housing 100 along the third direction, the wiring copper bar 500 corresponding to each pole of the circuit breaker can be separated by the partition plate 310 to prevent inter-phase short circuit; at the second end of the housing 100 along the third direction, the wiring copper bar 500 corresponding to each pole of the circuit breaker can be separated by the phase partition 400 to prevent inter-phase short circuit.

[0055] Exemplarily, a plurality of partition plates 310, for example two, are arranged in the terminal cover 300 along the second direction. The number of the partition plates 310 is determined by the number of poles of the circuit breaker. Specifically, the limiting slide groove 101 at the first end of the housing 100 along the third direction is arranged in a one-to-one correspondence with the partition plates 310.

[0056] Exemplarily, the second end of the housing 100 along the third direction is provided with a plurality of limiting sliding grooves 101, and each limiting sliding groove 101 is respectively plugged with a phase partition 400. The number of the phase partitions 400 is determined by the number of poles of the circuit breaker.

[0057] Specifically, an arc-isolating grid (not shown) may be provided in the terminal cover 300, and a plurality of vents may be provided on the arc-isolating grid. Furthermore, an exhaust hole 301 may be provided on the terminal cover 300. In this embodiment, the gas ejected outward from the gas outlet of the arc-extinguishing chamber of the circuit breaker is ejected from the first end of the housing 100 along the third direction, and the gas is discharged from the exhaust hole 301 after passing through the arc-isolating grid. The arc-isolating grid slows down the flow rate of the gas, thereby shortening the arcing distance, effectively preventing the splashing of metal particles in the gas, preventing the secondary short circuit and phase breakdown of the circuit breaker, and protecting the live equipment around the circuit breaker. Exemplarily, the arc-isolating grid may be made of metal.

[0058] Furthermore, a mesh plate (not shown) may be disposed in the terminal cover 300 to filter metal particles in the gas and further prevent the metal particles from splashing out of the gas outlet.

[0059] In this embodiment, refer to Figure 3 and Figure 7 As shown, the terminal cover 300 includes two side plates 320 arranged opposite to each other along the second direction, and a limiting portion is provided at the end of the side plate 320 along the third direction, and the limiting portion includes a stop bar 321 extending along the first direction, and a convex strip 3211 extending along the first direction is provided on the inner side of the stop bar 321, and a first limiting groove 104 corresponding to the convex strip 3211 is provided on the housing 100, and the first end of the housing 100 along the third direction is arranged between the two stop bars 321, and the convex strip 3211 is placed in the corresponding first limiting groove 104. In this embodiment, the first end of the housing 100 along the third direction is arranged between the two stop bars 321 to increase the limiting distance between the terminal cover 300 and the housing 100 along the second direction, and the convex strip 3211 is placed in the corresponding first limiting groove 104 to increase the limiting distance between the terminal cover 300 and the housing 100 along the third direction, thereby making the connection between the terminal cover 300 and the housing 100 more stable.

[0060] Exemplarily, the first limiting groove 104 may extend from the top of the middle cover 120 to the bottom of the base 110 .

[0061] Exemplarily, the convex strip 3211 may be located at an end of the blocking strip 321 along the third direction.

[0062] For example, the cross-sectional shape of the convex strip 3211 may be arc-shaped, and the arc surface of the convex strip 3211 may extend from the inner side of the stop bar to the outer side of the stop bar 321, that is, the end of the stop bar along the third direction may be as follows: Figure 7 Of course, the cross-sectional shape of the convex strip 3211 can also be other shapes, which is not limited in this application.

[0063] In a feasible embodiment, first clearance grooves 105 are respectively provided on both sides of the shell 100 along the second direction, and first limiting grooves 104 are provided in the first clearance grooves 105. The blocking bars 321 are placed in the corresponding first clearance grooves 105, so that the shell 100 and the side plate 320 can be kept flush, making the structure of the circuit breaker assembly more compact.

[0064] In a feasible embodiment, the limiting portion further includes a limiting strip 322 extending along the first direction, the limiting strip 322 is located on the inner side of the stop strip 321, and a boss 3221 is provided at the end of the limiting strip 322 along the third direction, and a second limiting groove 106 corresponding to the limiting strip 322 is provided on the housing 100, and a positioning groove 107 is provided in the second limiting groove 106, and the limiting strip 322 is inserted into the corresponding second limiting groove 106 along the first direction, and the boss 3221 is placed in the corresponding positioning groove 107. In this embodiment, the provision of the boss 3221 can increase the limiting between the terminal cover 300 and the housing 100 along the second direction, and the limiting between the terminal cover 300 and the housing 100 along the third direction, thereby making the connection between the accessory 200 and the housing 100 more stable.

[0065] Exemplarily, the second limiting groove 106 is disposed on the middle cover 120 .

[0066] Exemplarily, the cross-sectional shape of the boss 3221 includes, but is not limited to, an arc shape and a triangle shape.

[0067] In this embodiment, Figure 5 , Figure 6 , Figures 8 to 10 As shown, the limiting protrusion 220 includes a first protrusion 221 and a second protrusion 222. The first protrusion 221 is arranged at the top end of the plug-in portion 210 along the first direction, and at least two first protrusions 221 are arranged at intervals along the third direction; the second protrusion 222 is arranged at the bottom end of the plug-in portion 210 along the first direction.

[0068] Exemplarily, one of the first protrusions 221 and the second protrusion 222 are arranged opposite to each other along the first direction, and the number of the limiting grooves 102 provided on the side wall of the limiting slide groove 101 is the same as the number of the first protrusions 221, that is, the limiting grooves 102 and the first protrusions 221 are arranged one by one, which can simplify the structure of the shell 100 and the accessory 200.

[0069] In this embodiment, when assembling the accessory 200, the second protrusion 222 slides in the corresponding limiting groove 102 to position the limiting buckle 230, so that the limiting buckle 230 can be stably engaged with the limiting groove 103 to ensure the accuracy of the engagement. In addition, the first protrusions 221 are placed in the limiting grooves 102 in a one-to-one correspondence, which can make the connection between the accessory 200 and the housing 100 more stable and reliable.

[0070] Exemplarily, the first protrusion 221 includes two first protrusions 2211, and the two first protrusions 2211 are symmetrically arranged on both sides of the plug-in portion 210 along the second direction. The cross-sectional shape of the first protrusion 2211 includes but is not limited to a trapezoid.

[0071] Exemplarily, the second protrusion 222 includes two second protrusions 2221, and the two second protrusions 2221 are symmetrically arranged on both sides of the plug-in portion 210 along the second direction. The cross-sectional shape of the second protrusion 2221 includes but is not limited to a trapezoid.

[0072] For example, the first protrusion 221 and the second protrusion 222 that are disposed opposite to each other along the first direction may be located at an end of the plug-in portion 210 along the third direction.

[0073] In a possible implementation, Fig.11 As shown, the plug-in portion 210 is provided with a pressing protrusion 240 between two adjacent first protrusions 221 , and the pressing protrusion 240 abuts against the side wall of the limiting sliding groove 101 , so that the connection between the accessory 200 and the housing 100 is more stable and reliable.

[0074] In a feasible implementation, the extrusion protrusion 240 may not be provided on the terminal cover 300 to facilitate assembly between the terminal cover 300 and the housing 100 ; the extrusion protrusion 240 is provided on the phase partition 400 to further prevent the phase partition 400 from being separated from the housing 100 .

[0075] Exemplarily, the cross-sectional shape of the extrusion protrusion 240 includes, but is not limited to, an arc shape.

[0076] Exemplarily, the extrusion protrusion 240 includes two extrusion protrusion portions 241 , and the two extrusion protrusion portions 241 are symmetrically arranged on both sides of the plug-in portion 210 along the second direction.

[0077] Exemplarily, the bottom end of the extrusion protrusion 240 along the first direction is provided with an inclined end surface 2411 to facilitate the extrusion protrusion 240 to slide into the limiting slide groove 101, effectively preventing jamming during assembly. Among them, the two extrusion protrusions 241 are respectively provided with inclined end surfaces 2411. Specifically, from the bottom end to the top end of the extrusion protrusion 240, the inclined end surface 2411 is inclined in the second direction away from the plug-in portion 210. Exemplarily, the bottom edge of the inclined end surface 2411 can extend to connect with the plug-in portion 210 to further prevent jamming during assembly.

[0078] In this embodiment, refer to Figures 12 to 15 As shown, the limit buckle 230 includes two undercuts 231 arranged opposite to each other along the second direction, and a gap is formed between the two undercuts 231, so that the undercuts 231 can be deformed in the limit slide groove 101, and the undercuts 231 are suitable for sliding in the limit slide groove 101 until they are engaged with the limit slot 103. In addition, when the terminal cover 300 needs to be maintained and disassembled, the undercuts 231 of the terminal cover 300 are squeezed toward the gap, so that the undercuts 231 can be withdrawn from the limit slot 103 to achieve unlocking.

[0079] In a feasible implementation, the limiting slide 101 includes a closing portion 1011, the closing portion 1011 is located at the bottom end of the limiting slide 101 along the first direction, and a limiting card slot 103 is provided at the bottom end of the closing portion 1011 along the first direction. The width D1 of the limiting buckle 230 is greater than the width D2 of the closing portion 1011. In this embodiment, in the limiting slide 101, the undercut 231 is squeezed and deformed only at the closing portion 1011, which effectively prevents the undercut 231 from being permanently deformed and affecting the card connection with the limiting card slot 103, and facilitates the assembly between the accessory 200 and the housing 100.

[0080] Exemplarily, the width of the limiting buckle 230 may be equal to the width of the plug-in portion 210 .

[0081] Specifically, the undercut 231 includes a connecting arm 2311 and a hook 2312. The first end of the connecting arm 2311 is connected to the plug-in portion 210, and the second end of the connecting arm 2311 is connected to the hook 2312. A second easing groove 2313 is formed between the plug-in portion 210, the connecting arm 2311 and the hook 2312. The second easing groove 2313 makes way for the closing portion 1011 to allow the undercut 231 to recover its deformation. Fig.15 The shape shown is large at the upper end and small at the lower end.

[0082] Furthermore, the closing portion 1011 includes two transition slopes 1012 arranged opposite to each other along the second direction, and the transition slopes 1012 are located at the top of the closing portion 1011 along the first direction. The limiting slide groove 101 smoothly transitions at the closing portion 1011. In this embodiment, the setting of the transition slopes 1012 is suitable for the undercut 231 to pass through the closing portion 1011, effectively preventing jamming.

[0083] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A circuit breaker assembly, characterized in that: include: A circuit breaker comprises a housing (100), wherein a limiting slide groove (101) is provided on the housing (100), a limiting groove (102) is provided on the side wall of the limiting slide groove (101), and a limiting clamping groove (103) is provided at the bottom end of the limiting slide groove (101) along a first direction; The accessory (200) is provided with a plug-in portion (210), a limiting protrusion (220) is provided on the peripheral side of the plug-in portion (210), and a limiting buckle (230) is provided at the bottom end of the plug-in portion (210) along the first direction; wherein, The plug-in portion (210) is plugged into the limiting sliding groove (101) along a first direction, and the limiting protrusion (220) is placed in the limiting groove (102), and the limiting buckle (230) is engaged with the limiting groove (103).

2. The circuit breaker assembly according to claim 1, characterized in that The accessory (200) comprises a terminal cover (300), a partition plate (310) is arranged inside the terminal cover (300), and the plug-in portion (210) is arranged on the partition plate (310).

3. The circuit breaker assembly according to claim 2, characterized in that The terminal cover (300) comprises two side plates (320) arranged opposite to each other along the second direction, a limiting portion is provided at the end of the side plate (320) along the third direction, the limiting portion comprises a blocking bar (321) extending along the first direction, a convex strip (3211) extending along the first direction is provided on the inner side of the blocking bar (321), a first limiting groove (104) corresponding to the convex strip (3211) is provided on the housing (100), the first end of the housing (100) along the third direction is arranged between the two blocking bars (321), and the convex strip (3211) is placed in the corresponding first limiting groove (104).

4. The circuit breaker assembly according to claim 3, characterized in that The housing (100) is provided with first clearance grooves (105) on both sides along the second direction, the first clearance grooves (105) are provided with the first limiting grooves (104), and the blocking bars (321) are arranged in the corresponding first clearance grooves (105).

5. The circuit breaker assembly according to claim 3, characterized in that The limiting portion also includes a limiting strip (322) extending along the first direction, the limiting strip (322) is located on the inner side of the blocking strip (321), and a convex column (3221) is provided at the end of the limiting strip (322) along the third direction, and a second limiting groove (106) corresponding to the limiting strip (322) is provided on the housing (100), and a positioning groove (107) is provided in the second limiting groove (106), and the limiting strip (322) is inserted into the corresponding second limiting groove (106) along the first direction, and the convex column (3221) is placed in the corresponding positioning groove (107).

6. The circuit breaker assembly according to claim 1, characterized in that The limiting protrusion (220) comprises: A first protrusion (221) is arranged at the top end of the plug-in portion (210) along the first direction, and at least two first protrusions (221) are arranged at intervals along the third direction; The second protrusion (222) is arranged at the bottom end of the plug-in portion (210) along the first direction.

7. The circuit breaker assembly according to claim 6, characterized in that The plug-in portion (210) is provided with an extrusion protrusion (240) between two adjacent first protrusions (221), and the extrusion protrusion (240) abuts against the side wall of the limiting sliding groove (101).

8. The circuit breaker assembly according to claim 7, characterized in that The bottom end of the extrusion protrusion (240) along the first direction is provided with an inclined end surface (2411).

9. The circuit breaker assembly according to claim 1, characterized in that The limiting buckle (230) comprises two undercuts (231) arranged opposite to each other along the second direction, and a gap is formed between the two undercuts (231).

10. The circuit breaker assembly according to claim 1, characterized in that The limiting slide groove (101) comprises a closing portion (1011), the closing portion (1011) is located at the bottom end of the limiting slide groove (101) along the first direction, and the limiting slot (103) is provided at the bottom end of the closing portion (1011) along the first direction.

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