A circuit breaker and power distribution system

Abstract

This application discloses a circuit breaker and a power distribution system, comprising a housing and a main line switching component and a circuit board assembly disposed within the housing; the circuit board assembly includes a cover opening detection circuit and a controller, the cover opening detection circuit being connected to a pin of the controller; the cover opening detection circuit has a mechanical switch; a portion of the mechanical switch extends through the housing for triggering by an external cover; the mechanical switch includes a first state and a second state, the first state being triggered by the cover and the second state being not triggered by the cover; when the mechanical switch is in the second state or transitions from the first state to the second state, the controller generates a cover opening signal; this application features cover opening detection.

Description

Technical Field

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

[0002] Electricity meters are often equipped with lead seals or open cover detection functions to prevent electricity theft. Patents such as CN219266380U and CN201130201Y disclose open cover detection functions in electricity meters.

[0003] In recent years, with the continuous development of circuit breakers, their application in electricity meters has also developed rapidly. However, for electricity meters, cover opening detection is not a mandatory requirement. Therefore, in some scenarios, the electricity meters used do not have this function, and current circuit breakers also lack it. In such cases, it is difficult to detect whether the distribution box or cabinet has been opened by someone.

[0004] Therefore, it is clearly necessary to design a circuit breaker with cover opening detection function. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to provide a circuit breaker and a power distribution system.

[0006] This application provides: a circuit breaker, comprising a housing and a main circuit switching component and a circuit board assembly disposed within the housing; the circuit board assembly includes a cover opening detection circuit and a controller, the cover opening detection circuit being connected to a pin of the controller; the cover opening detection circuit having a mechanical switch; a portion of the mechanical switch extending through the housing for triggering by an external cover; the mechanical switch including a first state and a second state, the first state being a state triggered by the cover and the second state being a state not triggered by the cover; when the mechanical switch is in the second state or transitions from the first state to the second state, the controller generates a cover opening signal.

[0007] In some embodiments of this application, a communication module is also included. The communication module is electrically connected to the controller and is used to communicate with a host computer, a mobile terminal, or a handheld terminal.

[0008] In some embodiments of this application, a memory for storing the opening signal record is also included, which is electrically connected to the controller or is built into the controller.

[0009] In some embodiments of this application, the mechanical switch includes an operating element, a moving conductive element, and a stationary conductive element; a through hole is provided on the housing, and one end of the operating element extends out of the housing through the through hole for triggering by an external cover; the operating element and the housing are movably connected; the stationary conductive element is electrically connected to the circuit board assembly, the first end of the moving conductive element is electrically connected to the circuit board assembly, and the second end of the moving conductive element corresponds to the stationary conductive element; of the first state and the second state, one corresponds to the second end being in contact with the stationary conductive element, and the other corresponds to the second end being separated from the stationary conductive element; the second end of the moving conductive element is connected to the operating element so that when the operating element is triggered by an external cover, the mechanical switch switches from the second state to the first state.

[0010] In some embodiments of this application, the moving conductive element is a torsion spring or a spring sheet. When the force from the external cover disappears, the mechanical switch switches from the first state to the second state under the elastic force of the moving conductive element.

[0011] In some embodiments of this application, a reset spring is also included. The reset spring is connected to the second end of the moving conductive element or to the operating element. When the force from the external cover disappears, the mechanical switch switches from the first state to the second state under the elastic force of the reset spring.

[0012] In some embodiments of this application, the outer shell includes a first shell portion and a second shell portion, the length of the first shell portion is greater than the length of the second shell portion, the first shell portion is located above the second shell portion, and the through hole is opened on the second shell portion and located on one side of the first shell portion.

[0013] In some embodiments of this application, the control member and the housing are slidably connected; the control member includes a pressing part and a main body part, the pressing part is connected to the upper end of the main body part, the pressing part is exposed in the through hole, the size of the main body part is larger than the size of the through hole, and the main body part is always inside the housing.

[0014] In some embodiments of this application, the outer shell includes two half-shells that are assembled together. One half-shell is provided with a surrounding rib, and the other half-shell is provided with a limiting boss. The surrounding rib forms a semi-enclosed space, the main body is located in the semi-enclosed space, and the limiting boss extends into the semi-enclosed space and is located on one side of the main body.

[0015] In some embodiments of this application, the housing includes a module housing and a switch housing, which are two independent housings; the module housing is disposed on one side of the switch housing, and the circuit board assembly and mechanical switch are arranged in the module housing.

[0016] In some embodiments of this application, the lid opening detection circuit further includes a power supply VCC, a pull-up resistor, and a current-limiting resistor; one end of the power supply VCC is electrically connected to one end of the pull-up resistor, the other end of the pull-up resistor is electrically connected to one end of the current-limiting resistor and one end of the mechanical switch, the other end of the mechanical switch is grounded, and the other end of the current-limiting resistor is connected to a pin of the controller; the second state is that the mechanical switch is open, and the first state is that the mechanical switch is closed; when the mechanical switch is in the first state, the controller receives a low level through the pin; when the mechanical switch is in the second state, the controller receives a high level through the pin; after receiving the high level, the controller generates a lid opening signal.

[0017] A power distribution system includes a box and a cover; wherein the box is equipped with the aforementioned circuit breaker; the cover has a closed state and an open state, wherein when the cover is in the closed state, the cover triggers a mechanical switch; and when the cover is in the open state, the cover does not trigger a mechanical switch.

[0018] The advantages of this application compared to the prior art are:

[0019] This application incorporates a cover-opening detection circuit on the circuit breaker. When the mechanical switch is in its second state or transitions from its first state to the second state (triggered by an external cover), the controller generates an open cover signal. This allows for cover-opening detection using the circuit breaker, eliminating the need for a separate energy meter with this function, thus enriching user options. Attached Figure Description

[0020] 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.

[0021] Figure 1 An axial view of the circuit breaker in an embodiment of this application is shown;

[0022] Figure 2 A partially enlarged view of the mechanical switch in an embodiment of this application is shown;

[0023] Figure 3 A schematic diagram of the power distribution system (after opening the cover) in an embodiment of this application is shown;

[0024] Figure 4 A schematic diagram of the power distribution system (without cover) in an embodiment of this application is shown;

[0025] Figure 5 A partial cross-sectional view of the circuit breaker in an embodiment of this application is shown;

[0026] Figure 6 A schematic diagram of the actuator in an embodiment of this application is shown;

[0027] Figure 7 A schematic diagram of the moving conductive element in an embodiment of this application is shown;

[0028] Figure 8 A schematic diagram of the circuit board assembly in an embodiment of this application is shown;

[0029] Figure 9 The diagram shows a schematic of the cover opening detection circuit and other modules in the circuit board assembly of this application embodiment. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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

[0035] like Figures 1-9 As shown, an embodiment of this application is a distribution box system, including a box body 100, a cover 110, and a circuit breaker 200. The box body 100 has an internal space to accommodate the circuit breaker 200. The cover 110 can be opened, allowing for maintenance, replacement of the circuit breaker 200, and other related operations. There are several ways to open the cover 110. It can be hinged to the box body 100, allowing the cover to be rotated to open; or it can be removably connected to the box body 100 (e.g., screw fastening, snap-fit ​​connection), allowing the cover to be removed entirely. Regardless of the method, the cover 110 essentially has two states: a closed state (the box body 100 and the cover 110 do not move or rotate) and an open state (the box body 100 and the cover 110 have moved or rotated).

[0036] Circuit breaker 200 is a circuit breaker 200 with cover opening detection function.

[0037] Specifically, it includes a housing 210 and a main circuit switching component and a circuit board assembly 220 disposed within the housing 210.

[0038] Here, the main circuit switching component can be understood as an assembly composed of moving contacts, stationary contacts, operating mechanisms, and other parts. Simply put, the main circuit switching component is essentially an air switch. In addition, the main circuit switching component may also include residual current protection, equivalent to a residual current circuit breaker 200. In any case, the main circuit switching component primarily needs to include the functions of connecting and disconnecting the main circuit, overload protection, and short-circuit protection.

[0039] The circuit board assembly 220 includes a cover opening detection circuit 230 and a controller 240, one pin of which is electrically connected to the cover opening detection circuit 230. The cover opening detection circuit 230 has a mechanical switch K, a portion of which extends out of the housing 210 for triggering by the external cover 110.

[0040] The mechanical switch K includes a first state S1 and a second state S2. The first state S1 is triggered by the lid 110, and the second state S2 is not triggered by the lid 110. That is, when the lid 110 is closed, the mechanical switch K is triggered by the lid 110 and is in the first state S1; when the lid 110 is open, the mechanical switch K is not triggered by the lid 110 and is in the second state S2. With this structure, since one pin of the controller 240 is electrically connected to the lid-opening detection circuit 230, the voltage levels received by the controller 240 are different when it is in the first state S1 and the second state S2. Therefore, the controller 240 can determine whether the lid 110 is in the open state based on this voltage level change (including two scenarios: scenario one, when in the first state S1, the controller receives a high voltage level, and after switching to the second state S2, the controller receives a low voltage level; scenario two, when in the first state S1, the controller receives a low voltage level, and after switching to the second state S2, the controller receives a high voltage level), thereby generating an open signal. Here, when the mechanical switch K is in the second state S2 or when it changes from the first state S1 to the second state S2, the controller 240 generates an open cover signal. This open cover signal is actually an electrical signal.

[0041] This structure enables the function of opening the cover by generating an opening signal, thus enriching the user's choices (the user can choose an energy meter without the function of opening the cover and instead use this circuit breaker 200).

[0042] The uses of a lid-opening signal are numerous. For example, it can be combined with an indicator light to show whether the lid is open. Alternatively, it can be combined with a speaker to provide an audible alert. The signal can also be provided to a host computer, mobile terminal, or handheld device for the user or maintenance personnel to receive.

[0043] This provides a means of access for users or maintenance personnel. The circuit board assembly 220 also includes a communication module 250, which is electrically connected to the controller 240. Users can communicate with the communication module 250 via a host computer (e.g., PC), mobile terminal (e.g., mobile phone), or handheld terminal to obtain the lid-opening signal. The communication module 250 can use various communication methods, such as RS-485, Wi-Fi, 4G, 5G, near-field communication, Modbus, Bluetooth, etc., as long as the lid-opening signal can be transmitted.

[0044] Here, the record of the lid-opening signal can also be stored in the memory 260 for users or maintenance personnel to query. The memory 260 can be built into the controller 240 (e.g., a storage area within the controller 240) or it can be independent of the controller 240 (electrically connected to the controller 240). With this memory 260 setup, users or maintenance personnel can retrieve the corresponding record by querying the record of the lid-opening signal in the memory 260. Of course, in addition to recording whether a lid-opening signal has occurred, the record can also record the date, time, and historical frequency of the lid-opening signal, etc., which can be configured according to actual needs.

[0045] Of course, the memory 260 and the communication module 250 can be configured simultaneously, or only one of them can be configured. When configured simultaneously, a host computer, mobile terminal, or handheld terminal can query the memory 260 to obtain the opening signal.

[0046] There are many ways to implement the mechanical switch K here. One simple implementation method is...

[0047] The mechanical switch K includes an operating element K20, a moving conductive element K30, and a stationary conductive element K10.

[0048] The static conductive component K10 is electrically connected to the circuit board assembly 220.

[0049] The first end K301 of the moving conductive component K30 is electrically connected to the circuit board assembly 220, and the second end K302 of the moving conductive component K30 corresponds to the static conductive component K10.

[0050] The outer casing 210 has a through hole K40, and one end of the operating member K20 extends out of the outer casing 210 through the through hole K40 for triggering the outer cover 110. Here, the operating member K20 and the outer casing 210 are slidably configured. The operating member K20 is located above and connected to the second end K302, and the connection is made by abutment. Of course, in addition, the second end K302 can also be hung on or clipped onto the operating member K20, so that the movement of the operating member K20 can be converted into a change in the position of the second end K302. There are many ways to configure the operating member K20, such as rotation or swing, as long as it is movable and can cause a change in the position of the second end K302 according to the change in the position of the operating member K20, so that the mechanical switch K switches from the second state S2 to the first state S1.

[0051] Here, in the first state S1 and the second state S2, one corresponds to the second end K302 being in contact with the static conductive component K10, and the other corresponds to the second end K302 being separated from the static conductive component K10. In this embodiment, the first state S1 is when the second end K302 is in contact with the static conductive component K10, and the second state S2 is when the second end K302 is separated from the static conductive component K10. Of course, the two states can also be interchanged, as long as the controller 240 can generate an opening signal according to the change in state.

[0052] As a preferred approach, the moving conductive element K30 is a torsion spring. Thus, when the second end K302 contacts the stationary conductive element K10 in the first state S1, the torsion spring has already deformed. As the force from the external cover 110 disappears (the cover is opened), the mechanical switch K switches from the first state S1 to the second state S2. This structure eliminates the need for an additional reset mechanism. The torsion spring can also be replaced with a leaf spring. To facilitate the installation of the torsion spring, a mounting post is provided in the housing 210, and the coil of the torsion spring can be fitted onto the mounting post. Alternatively, a reset spring can be added, connected to the second end K302 of the moving conductive element K30 or connected to the operating element K20, ensuring that the mechanical switch K can switch from the first state S1 to the second state S2.

[0053] For this lid-opening detection circuit 230, as long as the state of the mechanical switch K changes, causing a high-low level change in the pin of the controller 240, the controller 240 can generate a lid-opening signal. As a preferred embodiment, the lid-opening detection circuit 230 also includes a power supply VCC, a pull-up resistor R1, and a current-limiting resistor R2. One end of the power supply VCC is electrically connected to one end of the pull-up resistor R1, and the other end of the pull-up resistor R1 is electrically connected to one end of the current-limiting resistor R2 and one end of the mechanical switch K. The other end of the mechanical switch K is grounded, and the other end of the current-limiting resistor R2 is connected to a pin of the controller 240.

[0054] In the second state S2, mechanical switch K is open, and in the first state S1, mechanical switch K is closed. When mechanical switch K is in the first state S1, controller 240 receives a low-level signal through its pin. When mechanical switch K is in the second state S2, controller 240 receives a high-level signal through its pin. Upon receiving the high-level signal, controller 240 generates an open-lid signal. This "generating an open-lid signal upon receiving a high-level signal" includes both immediate generation and delays (e.g., 0.2 seconds, 0.1 seconds, 0.3 seconds, 0.4 seconds, etc.) before generating the open-lid signal.

[0055] This circuit structure is very simple and can effectively and quickly identify whether the lid has been opened.

[0056] Here, the power supply VCC can come from many sources, such as a battery or the circuit board's own power supply, etc.

[0057] Here, the circuit breaker 200 can be an integrated circuit breaker 200 or a multi-pole assembly form.

[0058] Taking a multi-pole assembly as an example, the housing 210 includes a module housing 210a and a switch housing 210b. The switch housing 210b is actually the cover of the main circuit switching component, which is equivalent to the main circuit switching component being an independent switch.

[0059] The module housing 210a serves as a cover for the circuit board assembly 220, and the circuit board assembly 220 and the mechanical switch K are arranged within the module housing 210a.

[0060] This structure allows the modules formed by the circuit board assembly 220 and the main circuit switching assembly to be manufactured separately and then assembled. This separate assembly structure is beneficial for production and allows for the use of existing components (for example, only the modules of the circuit board assembly 220 need to be manufactured, and then directly assembled with existing air switches). As for the module housing 210a and the switch housing 210b, they can be fixed by riveting, snap-fit ​​connection, screw fastening, or a combination of these fastening methods.

[0061] Of course, as an integrated circuit breaker 200, it is only necessary to set two types of chambers in the housing 210: one chamber for arranging the circuit board assembly 220 and the mechanical switch K, and the other chamber for arranging the main circuit switching assembly. This integrated structure is more aesthetically pleasing and has relatively better stability.

[0062] Whether it's a split-type circuit breaker 200 or an integrated circuit breaker 200, its housing 210 has a first housing portion 2101 and a second housing portion 2102 (here, the first housing portion 2101 and the second housing portion 2102 are different parts of the same half-shell). Taking the split-type as an example, the modular housing 210a includes the first housing portion 2101 and the second housing portion 2102. The length of the first housing portion 2101 is greater than the length of the second housing portion 2102. The first housing portion 2101 is located above the second housing portion 2102, forming a similar U-shaped structure. The through hole K40 is opened on the second housing portion 2102 and is located on one side of the first housing portion 2101. That is to say, the operating element K20 of the mechanical switch K extends from the shoulder of the modular housing 210a, which is a relatively reasonable structural arrangement.

[0063] The control component K20 includes a pressing part K201 and a main body K202, with the pressing part K201 connected to the upper end of the main body K202. Here, the pressing part K201 is exposed in the through-hole K40 and is used to trigger the cover 110. The size of the main body K202 is larger than the size of the through-hole K40, and the main body K202 is always within the outer casing 210, so that the control component K20 can be stably installed in the casing and will not fall out of the through-hole K40.

[0064] Whether it's a split-type circuit breaker 200 or an integrated circuit breaker 200, its housing 210 comprises two half-shells. Taking the split-type as an example, the modular housing 210a includes a first half-shell 2100 and a second half-shell 2103. A through-hole K40 is formed on the first half-shell 2100. Below the through-hole K40, the first half-shell 2100 has a surrounding rib K50 forming a semi-enclosed space, within which the main body K202 is located. The second half-shell 2103 has a limiting boss K60. The surrounding rib K50 has an opening on the side facing the second half-shell 2103. After the second half-shell 2103 and the first half-shell 2100 are installed, the limiting boss K60 extends into the semi-enclosed space and is located on one side of the main body K202, providing a certain limiting effect on the main body K202 and ensuring the operational stability of the operating component K20.

[0065] Of course, the structures of the aforementioned rib K50 and limiting boss K60 can also be interchanged.

[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 circuit breaker characterized by: The device includes a housing, a main circuit switching component and a circuit board assembly disposed within the housing; the circuit board assembly includes a cover opening detection circuit and a controller, the cover opening detection circuit being connected to one pin of the controller; the cover opening detection circuit has a mechanical switch; a portion of the mechanical switch extends out of the housing for triggering by an external cover; the mechanical switch includes a first state and a second state, the first state being triggered by the cover and the second state being not triggered by the cover; when the mechanical switch is in the second state or transitions from the first state to the second state, the controller generates a cover opening signal.

2. The circuit breaker of claim 1, wherein: It also includes a communication module, which is electrically connected to the controller and is used to communicate with a host computer, a mobile terminal, or a handheld terminal. Or / and, it also includes a memory for storing the recorded opening signal, the memory being electrically connected to the controller or the memory being built into the controller.

3. The circuit breaker of claim 1, wherein: The mechanical switch includes an operating element, a moving conductive element, and a stationary conductive element. A through-hole is provided on the housing, through which one end of the operating element extends for triggering by an external cover. The operating element and the housing are movably connected. The stationary conductive element is electrically connected to the circuit board assembly, and the first end of the moving conductive element is electrically connected to the circuit board assembly, while the second end of the moving conductive element corresponds to the stationary conductive element. In either the first or second state, one corresponds to the second end being in contact with the stationary conductive element, and the other corresponds to the second end being separated from the stationary conductive element. The second end of the moving conductive element is connected to the operating element, so that when the operating element is triggered by an external cover, the mechanical switch switches from the second state to the first state.

4. The circuit breaker of claim 3, wherein: The moving conductive element is a torsion spring or a spring sheet. When the force from the external cover disappears, the mechanical switch switches from the first state to the second state under the elastic force of the moving conductive element. Alternatively, it may also include a reset spring, which is connected to the second end of the moving conductive element or to the operating element. When the force from the external cover disappears, the mechanical switch switches from the first state to the second state under the elastic force of the reset spring.

5. The circuit breaker of claim 3, wherein: The outer shell includes a first shell portion and a second shell portion. The length of the first shell portion is greater than that of the second shell portion. The first shell portion is located above the second shell portion. A through hole is opened on the second shell portion and located on one side of the first shell portion.

6. The circuit breaker of claim 3, wherein: The control element is slidably disposed with respect to the outer casing; the control element includes a pressing part and a main body part, the pressing part is connected to the upper end of the main body part, the pressing part is exposed in the through hole, the size of the main body part is larger than the size of the through hole, and the main body part is always inside the outer casing.

7. The circuit breaker of claim 6, wherein: The outer shell consists of two half-shells that are assembled together. One half-shell has a surrounding rib, and the other half-shell has a limiting boss. The surrounding rib forms a semi-enclosed space, and the main body is located within the semi-enclosed space. The limiting boss extends into the semi-enclosed space and is located on one side of the main body.

8. The circuit breaker of claim 1, wherein: The housing includes a module housing and a switch housing, which are two independent housings. The module housing is located on one side of the switch housing, and the circuit board assembly and mechanical switch are arranged in the module housing.

9. The circuit breaker of claim 1, wherein: The lid opening detection circuit includes a power supply VCC, a pull-up resistor, and a current-limiting resistor. One end of the power supply VCC is electrically connected to one end of the pull-up resistor, and the other end of the pull-up resistor is electrically connected to one end of the current-limiting resistor and one end of the mechanical switch. The other end of the mechanical switch is grounded, and the other end of the current-limiting resistor is connected to a pin of the controller. The second state is when the mechanical switch is open, and the first state is when the mechanical switch is closed. When the mechanical switch is in the first state, the controller receives a low level through the pin. When the mechanical switch is in the second state, the controller receives a high level through the pin. After receiving the high level, the controller generates a lid opening signal.

10. A power distribution system comprising a cabinet and a cabinet cover; characterized by: The enclosure is equipped with a circuit breaker as described in any one of claims 1-9; the enclosure cover has a closed state and an open state, when the enclosure cover is in the closed state, the enclosure cover triggers a mechanical switch; when the enclosure cover is in the open state, the enclosure cover does not trigger a mechanical switch.

Images