Miniature circuit breaker

Abstract

The utility model discloses a miniature circuit breaker which comprises a control module and at least one circuit breaker pole, and the control module and the circuit breaker pole are sequentially arranged in the first direction. Each circuit breaker pole comprises a pole shell, a main loop conductor and a mutual inductor, the mutual inductor and the main loop conductor are arranged in the pole shell, and the mutual inductor sleeves the main loop conductor; a control assembly is arranged in the control module; the device is characterized by further comprising an adapter plate, the adapter plate is arranged in all the pole shells in a penetrating mode, and one end of the adapter plate is electrically connected with the control assembly; the adapter plate is provided with plug-ins I in one-to-one correspondence with the circuit breaker poles, and the plug-ins I are located in pole shells of the corresponding circuit breaker poles; the mutual inductor is provided with a plug-in unit II, and the plug-in unit II and the corresponding plug-in unit I are in plug-in fit; the device has the advantage of being stable in structure.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliances, specifically a miniature circuit breaker. Background Technology

[0002] In the field of miniature circuit breakers, current transformers are often used to sample current information on the main circuit and feed it back to the control unit. For example, to achieve metering, a metering transformer is installed on each pole of the circuit breaker. The metering transformer feeds back the sampled information to the control unit, which can then calculate energy consumption based on the feedback from the metering transformer. As another example, to achieve short-circuit or overload protection, a protection transformer is installed on each pole of the circuit breaker. The protection transformer feeds back the sampled information to the control unit, which determines whether the sampled information reaches the tripping threshold. If it does, the circuit breaker trips.

[0003] Regardless of the function, an electrical connection must be established between the current transformer and the control component to ensure that the sampled information from the current transformer is fed back to the control component. Existing connection methods, such as the modular miniature circuit breaker with voltage and current sensors disclosed in CN207834219U, include a sequentially arranged intelligent control module (equivalent to a control component), four circuit breaker poles, and each circuit breaker pole has a current transformer and a current sensor connection plate (essentially a pin). The current sensor connection plate of each circuit breaker pole is plugged into the next circuit breaker pole, and the current sensor connection plate of the circuit breaker pole closest to the intelligent control module is plugged into the intelligent control module, thus completing the electrical connection between all current transformers and the control component.

[0004] Although this structure is relatively easy to assemble, each pin has to protrude from the surface of each circuit breaker pole. This design makes it prone to damage from bumps or the pins bending, which can prevent the circuit breaker poles from forming an ideal assembly.

[0005] Therefore, how to design a more reasonable connection structure between the current transformer and the circuit board assembly is a question worth considering. Summary of the Invention

[0006] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a miniature circuit breaker.

[0007] This application provides: a miniature circuit breaker, comprising a control module and at least one circuit breaker pole, wherein the control module and the circuit breaker pole are arranged sequentially along a first direction; each circuit breaker pole includes a pole housing, a main circuit conductor, and a current transformer, wherein the current transformer and the main circuit conductor are both disposed within the pole housing, and the current transformer is sleeved on the main circuit conductor; the control module has a control component inside; characterized in that: it further includes an adapter plate, the adapter plate passing through all the pole housings, one end of the adapter plate being electrically connected to the control component; the adapter plate is provided with plug-in I corresponding to each circuit breaker pole, the plug-in I being located within the pole housing of the corresponding circuit breaker pole; the current transformer is provided with plug-in II, the plug-in II forming a plug-in engagement with the corresponding plug-in I.

[0008] In some embodiments of this application, the control module includes a module housing, and the control component is disposed inside the module housing; the control component is provided with plug-in III, and the adapter board is provided with plug-in IV, and plug-in IV and plug-in III are plugged into each other.

[0009] In some embodiments of this application, the module housing is provided with a through hole for plug-in IV and plug-in III to form a plug-in fit; the module housing is also provided with an annular boss, which surrounds the through hole or surrounds plug-in IV or plug-in III.

[0010] In some embodiments of this application, all pole housings are provided with slot portions I along a first direction, and all slot portions I together form slot I, into which the adapter plate portion is inserted.

[0011] In some embodiments of this application, in the second direction, the adapter plate is positioned above the current transformer, and the second direction is perpendicular to the first direction.

[0012] In some embodiments of this application, the current transformer has a through hole through which the main circuit conductor passes, the axis of the through hole being parallel to a third direction, and the third direction being perpendicular to the first direction.

[0013] In some embodiments of this application, the main circuit conductor includes a first terminal block and a first terminal. The first terminal block includes a through section, which is a flat plate structure and passes through the current transformer and the first terminal.

[0014] In some embodiments of this application, the main circuit conductor includes a first terminal block and a first terminal. The first terminal block includes a through section, which includes a first section, a second section, and a bent section. The first section and the second section are both flat plate structures, and there is a height difference between them in the second direction. They are connected by the bent section. The first section passes through the first terminal and the second section passes through the current transformer.

[0015] In some embodiments of this application, the electrode housing includes a first shoulder position, and a receiving groove I is provided at the first shoulder position of the electrode housing. All the receiving grooves I of the electrode housing together form a space for accommodating the adapter plate. The electrode housing also includes a cover plate I, which is detachably fitted with the electrode housing to close all the receiving grooves I.

[0016] In some embodiments of this application, the control module includes a module housing, and the control component is disposed inside the module housing; a notch I is provided on the module housing, the connection between the adapter plate and the control component is exposed in the notch I, and a cover plate I extends into the module housing to fill the notch I.

[0017] In some embodiments of this application, a sampling plate and a sampling assembly adapted to the number of main circuit conductors are also included. The sampling plate is electrically connected to the control assembly, and the sampling assembly is electrically connected to the sampling plate. The sampling assembly is in contact with the corresponding main circuit conductor. The electrode housing includes a second shoulder position, and a receiving groove II is provided at the second shoulder position of the electrode housing. All the receiving grooves II of the electrode housing together form a space for accommodating the sampling plate. The electrode housing also includes a cover plate II, which is detachably fitted with the electrode housing to close all the receiving grooves II.

[0018] In some embodiments of this application, the control module includes a module housing, and the control component is disposed inside the module housing; a notch II is provided on the module housing, the connection between the sampling plate and the control component is exposed in the notch II, and a cover plate II extends into the module housing to fill the notch II.

[0019] In some embodiments of this application, the control module includes a module housing, and the control component is disposed inside the module housing; the control component is provided with plug-in V, and the sampling plate is provided with plug-in VI, and plug-in VI and plug-in V are plugged into each other.

[0020] In some embodiments of this application, all pole housings are provided with slot portions II along a first direction, and all slot portions II together form slot II, into which the sampling plate portion is inserted.

[0021] The advantages of this application compared to the prior art are:

[0022] With this structure, an adapter plate is inserted into all circuit breaker poles, and the adapter plate has a plug-in I that corresponds one-to-one with the circuit breaker pole. The plug-in I is located inside the pole housing of the corresponding circuit breaker pole. In this way, the connection between the current transformer and the adapter plate is protected by the pole housing and is not easily damaged by bumps or knocks. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a miniature circuit breaker according to an embodiment of this application is shown;

[0025] Figure 2 This diagram shows a miniature circuit breaker after the control module is removed, according to an embodiment of this application.

[0026] Figure 3 A schematic diagram illustrating the interaction between the adapter board and the control component in an embodiment of this application is shown;

[0027] Figure 4 A schematic diagram showing the interaction between the adapter board and some control modules in an embodiment of this application is shown;

[0028] Figure 5 This illustration shows a schematic diagram of cover plate I and cover plate II after an explosion, according to an embodiment of this application.

[0029] Figure 6 A schematic diagram of the main circuit conductor, current transformer, etc. of any pole circuit breaker in an embodiment of this application is shown;

[0030] Figure 7 This illustration shows a schematic diagram of the first terminal block and the current transformer after an explosion along a third direction in an embodiment of this application.

[0031] Figure 8 Another schematic diagram showing the cooperation between the first terminal block and the current transformer in an embodiment of this application is shown;

[0032] Figure 9 A schematic diagram of the sampling component and the second terminal board in an embodiment of this application is shown. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. Example

[0038] like Figures 1-9 As shown, an embodiment of this application is a miniature circuit breaker, which is an intelligent circuit breaker that includes a control module S and circuit breaker poles P.

[0039] The circuit breaker has four poles (P). The four-pole circuit breaker poles (P) are arranged sequentially along the first direction, which is the width direction F1 of the circuit breaker. Of course, the number of circuit breaker poles (P) is not limited to four; it can also be one pole, two poles, or three poles.

[0040] Each circuit breaker pole P includes a pole housing 601 and components such as the main circuit conductor 100, current transformer 500, and operating mechanism located inside the pole housing 601.

[0041] Here, the main circuit conductor 100 includes a first terminal block 101, a first terminal block 102, a stationary contact, a moving contact, a second terminal block 103, a second terminal block, a solenoid, a stationary contact, etc.

[0042] The moving contact is located on the operating mechanism. The operation of the operating mechanism enables the moving and stationary contacts to connect and disconnect, that is, to connect and disconnect the circuit breaker pole P.

[0043] Here, the current transformer 500 is mounted on the main circuit conductor 100, specifically on the first terminal block 102.

[0044] The control module S is located on one side of one of the circuit breaker poles P, and is also arranged along the first direction with the circuit breaker pole P. The control module S includes a module housing 200 and a control component 300. The control component 300 is located inside the module housing 200, and the control component 300 is actually a circuit board assembly.

[0045] The adapter plate 400 is used to realize the electrical connection between the current transformer 500 and the control component 300. One end of the adapter plate 400 is electrically connected to the control component 300, and the other end extends along a first direction, allowing the adapter plate 400 to pass through all the pole housings 601. The adapter plate 400 has a corresponding plug-in I 401 for each pole housing 601; that is, plug-in I 401 is disposed within the pole housing 601 of each corresponding circuit breaker pole P. A plug-in II (not shown in the figure) is disposed on the current transformer 500, and plug-in II forms a plug-in connection with plug-in I 401. Here, plug-in I 401 and plug-in II are relative and compatible concepts; for example, plug-in I 401 is a socket, and plug-in II is a plug.

[0046] There are many ways to electrically connect the adapter board 400 and the control component 300. For example, connectors or flexible wires can be used. In this embodiment, to facilitate product assembly, a connector III 301 is provided on the control component 300, and a connector IV 402 is provided on the adapter board 400. The connector IV 402 and the connector III 301 are connected by a plug-in joint to form an electrical connection. Here, the data sampled by the current transformer 500 has many uses, including metering (in which case the control component 300 includes a metering ground circuit), fault protection (in which case the control component 300 includes a short-circuit protection circuit, an overload protection circuit, etc.), and power supply (in which case the control component 300 includes a self-generating power supply circuit, etc.). Of course, these functions do not need to be present simultaneously; having any one of them is sufficient.

[0047] For the module housing 200, an annular boss 201 is provided on the inner wall of the module housing 200. Here, the annular boss 201 is arranged around the through hole, which is the hole through which part of the plug-in IV 402 passes and mates with plug-in III 301. The reason for adopting this annular design is to improve the stability of the plug-in mating joint and also to improve a certain degree of electrical insulation performance. Here, the annular boss 201 also surrounds the fourth plug-in. Of course, in addition to this, the annular boss 201 can also be changed to surround plug-in III 301, which has the same effect.

[0048] On all pole housings 601, slot portions I 6020 are provided along the first direction, and all slot portions I 6020 together form slot I 602, so that the adapter plate 400 is partially inserted into slot I 602. This insertion arrangement facilitates the installation of the adapter plate 400 and also facilitates the cooperation between plug-in I 401 and plug-in II. Here, the slot portion I 6020 of the circuit breaker pole P furthest from the control module S is a blind slot, while the other slots I 602 are through slots. In this way, the end of the adapter plate 400 furthest from the control module S can also abut in the blind slot, improving insulation performance.

[0049] In the second direction, that is, in the height direction F2 of the circuit breaker, the adapter plate 400 is positioned above the current transformer 500. This arrangement allows the first connector to also be located near the current transformer 500, which is beneficial for forming a plug-in connection between the two.

[0050] The current transformer 500 has a central hole, also known as a through hole. This through hole is for the main circuit conductor 100 to pass through. The axis O of the through hole is parallel to a third direction, which is the length direction F3 of the circuit breaker. The reason for setting the axis O of the current transformer 500 to be parallel to the third direction is to minimize the bending of the main circuit conductor 100. In the prior art, the axis O of the current transformer 500 is parallel to the first direction (width direction F1), which would require the main circuit conductor 100 to form multiple bends to pass through the current transformer 500.

[0051] There are many ways to pass through the current transformer 500. In this embodiment, the first terminal plate 102 is used to pass through the current transformer 500. Specifically, the first terminal plate 102 has a passing section 102a, which is a flat plate structure. This flat plate structure can be understood as a straight line structure without bends. This passing section 102a directly passes through the current transformer 500 and the first terminal 101, which is very convenient for manufacturing. At the same time, the current direction is relatively unidirectional, because too many bends will cause too many changes in the current direction (too many current directions may result in different directions of the magnetic field force, affecting the sampling accuracy of the current transformer 500).

[0052] Of course, besides using a flat plate structure, a bend can also be incorporated into the through-running section 102a to avoid some space constraints. In this method, the through-running section 102a includes a first section 102a1, a second section 102a2, and a bend section 102a3. Both the first section 102a1 and the second section 102a2 are flat plate structures, with a height difference in the second direction, connected by the bend section 102a3. The first section 102a1 passes through the first terminal 101, and the second section 102a2 penetrates the current transformer 500. Although this method involves two bends in the through-running section 102a, it minimizes the total number of bends compared to existing technologies with more than two bends. Furthermore, the height difference between the first section 102a1 and the second section 102a2 in the second direction helps the current transformer 500 avoid some internal structures of the circuit breaker.

[0053] The pole housing 601 is formed by assembling two halves of the housing. This pole housing 601 is roughly "convex" shaped, containing two shoulder positions, namely the first shoulder position J1 and the second shoulder position J2.

[0054] Here, the adapter plate 400 is located at the first shoulder position J1. Specifically, each pole housing 601 has a receiving groove I 610 at the first shoulder position J1, and the receiving grooves I 610 of all pole housings 601 together form a space to accommodate the adapter plate 400.

[0055] Here, the receiving groove I 610 has an opening, and the cover plate I 700 is used to close the opening of the receiving groove I 610. The cover plate I 700 and the electrode housing 601 are detachably connected via a plug-in method. The electrode housing 601 has a guide rail groove, and the cover plate I 700 has guide ribs. The guide ribs are inserted along the guide rail groove to complete the plug-in connection. The direction of the guide rail groove is also the first direction. Of course, in addition to this first-direction plug-in connection, a second-direction plug-in connection or a third-direction plug-in connection can also be used. Besides plug-in connections, other methods can also be used, such as snap-fit ​​connections or screw fastening, as long as the cover plate I 700 is detachable and can close the receiving groove I 610 after installation. Regardless of the method, this detachable design of the cover plate I 700 facilitates maintenance or the installation of insert I 401 and insert II.

[0056] The module housing 200 is also formed by assembling two halves of the housing, although more housings can be used. The module housing 200 has a notch I202, which corresponds to the receiving groove I610. Through the notch I202, the interior of the module housing 200 can be observed, specifically the connection between the adapter plate 400 and the control component 300. The cover plate I700 extends into the module housing 200, filling the notch I202. This design of the notch I202 and the cover allows for observation and maintenance of the connection between the adapter plate 400 and the control component 300 after the cover plate I700 is removed; it also ensures overall insulation performance after the cover plate I700 is installed.

[0057] Here, the sampling plate 900 and the sampling component 910 are arranged at the second shoulder position J2. Specifically, each pole housing 601 is provided with a receiving groove II 620 at the second shoulder position J2, and the receiving grooves II 620 of all pole housings 601 together form a space to accommodate the sampling plate 900 and the sampling component 910.

[0058] The number of sampling components 910 is matched to the number of main circuit conductors 100, meaning they are multiples of each other, and the number of sampling components 910 is not less than the number of main circuit conductors 100. Each sampling component 910 is in contact with a corresponding main circuit conductor 100 (second terminal plate 103) to sample information. The sampling plate 900 is electrically connected to the control component 300, and the sampling components 910 are electrically connected to the sampling plate 900. Information can be sampled and fed back to the control component 300 through the sampling components 910. Here, the sampled information varies depending on the sampling component 910.

[0059] This configuration of the sampling component 910 allows for the arrangement of temperature or current sampling.

[0060] Taking temperature sampling as an example, the sampling component 910 is a temperature sampling component, including a temperature sensor 911 and a heat-conducting plate 912. The temperature sensor 911 is mounted on the sampling plate 900, and the heat-conducting plate 912 is attached to the temperature sensor 911 and the second terminal plate 103. The sampling plate 900 can feed back the information sampled by the temperature sampling component to the control component 300. The control component 300 can use this information to identify the relevant temperature of the second terminal plate 103 for over-temperature protection or for user reference. Here, a groove can be opened on the electrode housing 601, and the heat-conducting plate 912 can be embedded in the groove, which will make the installation of the heat-conducting plate 912 more stable and convenient. Of course, the temperature sensor 911 can also be changed to contact the sampling plate 900.

[0061] Taking current sampling as an example, the sampling component 910 can also be a power-collecting plate, which supplies power to the control component 300 through the sampling board 900. Of course, in addition to supplying power to the control component 300, the power-collecting plate can also provide the control component 300 with current and voltage-related parameters.

[0062] Here, the receiving slot II 620 also has an opening, and the cover plate II 800 is used to close the opening of the receiving slot II 620. The installation method here is similar to the installation method between the cover plate I 700 and the electrode housing 601, and will not be described again here. This design of the cover plate II 800 is beneficial for maintenance or the installation of the sampling component 910, etc.

[0063] Similarly, the module housing 200 also features a notch II 203, which corresponds to the receiving groove II 620. Through the notch II 203, the interior of the module housing 200 can be observed, specifically the connection between the sampling plate 900 and the control component 300. The cover plate II 800 extends into the module housing 200, filling the notch II 203. This design of the notch II 203 and the cover plate II 800 allows for observation or maintenance of the connection between the sampling plate 900 and the control component 300 after the cover plate II 800 is removed; it also ensures overall insulation performance after the cover plate II 800 is installed.

[0064] Similarly, the electrical connection between the sampling plate 900 and the control component 300 can be a connector connection or a flexible wire connection. In this embodiment, the control component 300 is provided with plug-in V, and the sampling plate 900 is provided with plug-in VI, with plug-in VI and plug-in V engaging in a plug-in connection.

[0065] To facilitate the installation of the sampling plate 900, all pole housings 601 are provided with slot portions II 6030 along the first direction. All slot portions II 6030 together form slot II 603, into which the sampling plate 900 is partially inserted. This slot II 603 facilitates the installation of the sampling plate 900. The specific arrangement of slot portion II 6030 is similar to that of slot portion I 6020, and will not be described again here.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A miniature circuit breaker, comprising a control module and at least one circuit breaker pole, wherein the control module and the circuit breaker pole are arranged sequentially along a first direction; each circuit breaker pole includes a pole housing, a main circuit conductor, and a current transformer, wherein the current transformer and the main circuit conductor are both disposed within the pole housing, and the current transformer is sleeved on the main circuit conductor; the control module has control components inside; characterized in that: The adapter plate is arranged in all the pole housings and is electrically connected with the control assembly; the adapter plate is provided with a plug-in part I in each pole housing, the transformer is provided with a plug-in part II, and the plug-in part II is in plug-in cooperation with the corresponding plug-in part I.

2. A miniature circuit breaker according to claim 1, characterized in that: The pole housing comprises a first shoulder position, and the pole housing is provided with a receiving groove I at the first shoulder position, and the receiving grooves I of all the pole housings jointly form a space for accommodating the adapter plate; the pole housing further comprises a cover plate I which is detachably connected with the pole housing and is used for closing all the receiving grooves I.

3. A miniature circuit breaker according to claim 2, characterized in that: The control module comprises a module housing, and the control assembly is arranged in the module housing; the module housing is provided with a notch I, the connection part of the adapter plate and the control assembly is exposed in the notch I, and the cover plate I extends into the module housing to fill the notch I.

4. A miniature circuit breaker according to claim 1, characterized in that: The sampling plate and a sampling assembly adapted to the number of main circuit conductors are further included, the sampling plate is electrically connected with the control assembly, the sampling assembly is electrically connected with the sampling plate, and the sampling assembly is in contact with the corresponding main circuit conductor; the pole housing comprises a second shoulder position, and the pole housing is provided with a receiving groove II at the second shoulder position, and the receiving grooves II of all the pole housings jointly form a space for accommodating the sampling plate; the pole housing further comprises a cover plate II which is detachably connected with the pole housing and is used for closing all the receiving grooves II.

5. A miniature circuit breaker according to claim 4, characterized in that: The control module comprises a module housing, and the control assembly is arranged in the module housing; the module housing is provided with a notch II, the connection part of the sampling plate and the control assembly is exposed in the notch II, and the cover plate II extends into the module housing to fill the notch II. And / or, the control module comprises a module housing, and the control assembly is arranged in the module housing; the control assembly is provided with a plug-in part V, the sampling plate is provided with a plug-in part VI, and the plug-in part VI is in plug-in cooperation with the plug-in part V. And / or, all the pole housings are provided with a slot part II along the first direction, all the slot parts II jointly form a slot II, and the sampling plate is partially inserted into the slot II.

6. A miniature circuit breaker according to claim 1, characterized in that: All the pole housings are provided with a slot part I along the first direction, all the slot parts I jointly form a slot I, and the adapter plate is partially inserted into the slot I.

7. A miniature circuit breaker according to claim 1, characterized in that: In the second direction, the adapter plate is above the transformer, and the second direction is perpendicular to the first direction. And / or, the transformer has a through hole, the through hole is provided for the main circuit conductor to pass through, and the axis of the through hole is parallel to the third direction, and the third direction is perpendicular to the first direction.

8. A miniature circuit breaker according to claim 1, characterized in that: The main circuit conductor comprises a first terminal plate and a first wiring terminal, the first terminal plate comprises a passing-through segment, the passing-through segment is a flat plate structure, and the passing-through segment passes through the transformer and the first wiring terminal; Or, the main circuit conductor comprises a first terminal plate and a first wiring terminal, the first terminal plate comprises a passing-through segment, the passing-through segment comprises a first segment, a second segment and a bending segment, the first segment and the second segment are both flat plate structures, there is a height difference between the two in the second direction and they are connected through the bending segment, the first segment passes through the first wiring terminal, and the second segment penetrates the transformer.

9. A miniature circuit breaker according to claim 1, characterized in that: The control module comprises a module housing, and the control assembly is arranged in the module housing; the control assembly is provided with a plug-in part III, the adapter plate is provided with a plug-in part IV, and the plug-in part IV is in plug-in cooperation with the plug-in part III.

10. A miniature circuit breaker according to claim 9, characterized in that: The module shell is provided with a through hole for the plug-in part IV to be inserted into the plug-in part III; the module shell is further provided with an annular boss which surrounds the periphery of the through hole or surrounds the periphery of the plug-in part IV or surrounds the periphery of the plug-in part III.

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