Hybrid solid-state circuit breaker

Abstract

The invention relates to the technical field of circuit breakers, in particular to a hybrid solid-state circuit breaker. The hybrid solid-state circuit breaker provided by the invention comprises a shell, a mechanical switch and a solid-state switch, the mechanical switch and the solid-state switch are both arranged in the shell, and the mechanical switch and the solid-state switch are electrically connected to form a hybrid switching circuit; the hybrid switching circuit comprises a mechanical branch, an electronic power branch and an energy absorption branch, and the mechanical branch, the electronic power branch and the energy absorption branch are connected in parallel. The mechanical branch is used for passing through rated current and initial stage arc current, and the electronic power branch is used for controlling commutation of the energy absorption branch for arc energy absorption. According to the hybrid solid-state circuit breaker, the mechanical switch and the solid-state switch are combined, the solid-state switch intervenes when the mechanical switch is switched on or switched off, arc energy is introduced into the solid-state switch to play an arc extinguishing role, the performance of the circuit breaker is improved, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of circuit breakers, in particular to a hybrid solid-state circuit breaker. BACKGROUND

[0002] A low-voltage circuit breaker is an important control and protection electrical appliance. The low-voltage circuit breaker is mainly used in an AC or DC low-voltage power grid, and can not only manually or electrically switch a circuit, but also realize overload, short-circuit and under-voltage protection for the circuit or an electrical device.

[0003] The existing low-voltage circuit breaker product needs to be connected in series in multiple poles or needs to amplify an arc extinguishing system to meet the product performance when applied in a DC system, so the traditional product cannot meet higher performance requirements. Therefore, more and more low-voltage electrical appliance manufacturers are researching solid-state circuit breakers, and some pure solid-state circuit breaker products have appeared. However, because the pure solid-state circuit breaker needs a cooling device, the cost is high, so only some small-current products (below 80A) can be formally applied, and are not widely applied.

[0004] Therefore, it is urgent to design a circuit breaker which can be applied to a DC system and meet performance requirements and has low cost. SUMMARY

[0005] The application aims to provide a hybrid solid-state circuit breaker to solve the technical problems that the existing low-voltage circuit breaker needs to be connected in series in multiple poles or needs to amplify an arc extinguishing system to meet performance requirements when applied in a DC system, and the pure solid-state circuit breaker needs a cooling device, resulting in high cost.

[0006] The hybrid solid-state circuit breaker provided by the application comprises a shell, a mechanical switch and a solid-state switch, the mechanical switch and the solid-state switch are arranged in the shell, and the mechanical switch and the solid-state switch are electrically connected to form a hybrid switch circuit.

[0007] The hybrid switch circuit comprises a mechanical branch, an electronic power branch and an energy absorption branch, and the mechanical branch, the electronic power branch and the energy absorption branch are connected in parallel.

[0008] In the closing process of the hybrid switch circuit, the electronic power branch is controlled to be conductive to make the energy absorption branch commutate and the mechanical branch is controlled to be conductive.

[0009] In the opening process of the hybrid switch circuit, the mechanical branch is controlled to be disconnected, the electronic power branch is controlled to be conductive to make the energy absorption branch commutate.

[0010] The hybrid switch circuit is used to control the mechanical branch to be on and the electronic power branch to be off after closing and before opening, so that the current continuously flows through the mechanical branch.

[0011] The mechanical branch is used to pass rated current and starting stage arc current, and the electronic power branch is used to control the energy absorption branch to be commutated for fault energy absorption.

[0012] As a further technical solution, the electronic power branch comprises a power taking circuit and a pulse trigger circuit.

[0013] The hybrid switch circuit is used to control the power taking circuit to be on and the pulse trigger circuit to be on during closing.

[0014] The hybrid switch circuit is used to control the power taking circuit to be on and the pulse trigger circuit to be on during opening.

[0015] The hybrid switch circuit is used to control the power taking circuit to be off and the pulse trigger circuit to be off after closing and before opening.

[0016] The power taking circuit is used to supply power for the pulse trigger circuit, and the pulse trigger circuit is used to drive the energy absorption branch to be commutated.

[0017] As a further technical solution, the mechanical switch comprises a rotating shaft, a push rod, a first switch located on the electronic power branch, a second switch located on the electronic power branch, a moving contact and a stationary contact located on the mechanical branch, and the push rod and the moving contact are both connected to the rotating shaft.

[0018] The solid-state switch comprises a circuit board, and the energy absorption branch, the power taking circuit and the pulse trigger circuit are all located on the circuit board, the first switch is electrically connected to the pulse trigger circuit, and the second switch is electrically connected to the power taking circuit.

[0019] The push rod is used to actuate the first switch and the second switch.

[0020] As a further technical solution, the push rod and the moving contact are arranged in a spaced manner along the rotating direction of the rotating shaft.

[0021] During opening, the actuation distance between the push rod and the second switch is smaller than the actuation distance between the push rod and the first switch along the rotating direction of the rotating shaft.

[0022] As a further technical scheme, the push rod comprises a pushing part and a pair of connecting parts, the pushing part is located between the pair of connecting parts and connected to the pair of connecting parts at both ends, and the pushing part is used for actuating the first switch and the second switch.

[0023] The pair of connecting parts are connected to both ends of the rotating shaft in the axial direction.

[0024] As a further technical scheme, the first switch is a code dial switch.

[0025] And / or, the second switch is an auxiliary contact.

[0026] As a further technical scheme, the circuit board is provided with two, which are a first circuit board and a second circuit board, and the mechanical switch comprises an in-out positive terminal and an in-out negative terminal.

[0027] The in-out positive terminal is electrically connected to the first circuit board through a first wire, and the in-out negative terminal is electrically connected to the second circuit board through a second wire.

[0028] As a further technical scheme, the shell comprises a first shell and a second shell.

[0029] The mechanical switch is arranged in the first shell, and the solid-state switch is arranged in the second shell.

[0030] As a further technical scheme, the side surface of the first shell and the side surface of the second shell are mutually spliced.

[0031] As a further technical scheme, the hybrid solid-state circuit breaker has a single breaking point, or the hybrid solid-state circuit breaker has multiple breaking points.

[0032] Compared with the prior art, the hybrid solid-state circuit breaker provided by the application has the following technical advantages:

[0033] The application provides a hybrid solid-state circuit breaker, comprising: a shell, a mechanical switch and a solid-state switch, the mechanical switch and the solid-state switch are arranged in the shell, and the mechanical switch and the solid-state switch are electrically connected to form a hybrid switch circuit; the hybrid switch circuit comprises a mechanical branch, an electronic power branch and an energy absorption branch, and the mechanical branch, the electronic power branch and the energy absorption branch are connected in parallel; in the closing process of the hybrid switch circuit: the electronic power branch is controlled to be turned on to make the energy absorption branch commutate and the mechanical branch is controlled to be turned on; in the opening process of the hybrid switch circuit: the mechanical branch is controlled to be turned off, the electronic power branch is controlled to be turned on to make the energy absorption branch commutate; in the process after the closing and before the opening of the hybrid switch circuit: the mechanical branch is controlled to be turned on, the electronic power branch is controlled to be turned off, and the current continuously flows through the mechanical branch; the mechanical branch is used for passing rated current and starting stage arc current, and the electronic power branch is used for controlling the energy absorption branch to commutate for fault energy absorption.

[0034] The hybrid solid-state circuit breaker is combined by the mechanical switch and the solid-state switch, the solid-state switch is intervened when the mechanical switch is closed or opened, arc energy is introduced into the solid-state switch to play a role of arc extinguishing, the performance of the circuit breaker is improved, meanwhile, the manufacturing cost is not as high as that of the pure solid-state circuit breaker, cost is saved, and the shell can effectively protect the mechanical switch and the solid-state switch from being damaged.

[0035] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0037] Figure 1 A layout diagram of the hybrid solid-state circuit breaker provided by the embodiment of the present application is provided.

[0038] Figure 2 A side sectional view of the mechanical switch provided by the embodiment of the present application is provided.

[0039] Figure 3 A schematic view when the mechanical switch is closed provided by the embodiment of the present application is provided.

[0040] Figure 4 A schematic view when the mechanical switch is opened provided by the embodiment of the present application is provided.

[0041] Figure 5 A wiring diagram of the mechanical switch and the solid-state switch provided by the embodiment of the present application is provided.

[0042] Figure 6 A mixed solid state circuit breaker schematic diagram provided for the embodiment of the present application;

[0043] Figure 7 A mixed solid state circuit breaker circuit schematic diagram provided for the embodiment of the present application.

[0044] Figure: 1-mechanical switch; 2-solid state switch; 3-mechanical branch; 4-electronic power branch; 5-energy absorption branch; 7-rotary shaft; 8-push rod; 9-moving contact; 10-stationary contact; 11-pushing part; 12-connection part; 13-dial switch; 14-assistant contact; 15-first connection wire; 16-second connection wire; 17-first circuit board; 18-second circuit board; 19-first wire; 20-second wire; 21-first shell; 22-second shell. DETAILED DESCRIPTION

[0045] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In addition, the technical solutions among various embodiments can be combined with each other, but the combination of the technical solutions should be considered not to exist and not within the protection scope of the present application when the combination of the technical solutions appears contradictory or unachievable on the basis of being able to be realized by the ordinary skilled in the art.

[0049] The present application will be further described in detail below with specific examples and in conjunction with the drawings.

[0050] The specific structure is shown in Figures 1 to 7

[0051] The present embodiment provides a hybrid solid-state circuit breaker, comprising: a housing, a mechanical switch 1 and a solid-state switch 2, the mechanical switch 1 and the solid-state switch 2 are both arranged in the housing, and the mechanical switch 1 and the solid-state switch 2 are electrically connected to form a hybrid switch circuit; the hybrid switch circuit comprises a mechanical branch 3, an electronic power branch 4 and an energy absorption branch 5, and the mechanical branch 3, the electronic power branch 4 and the energy absorption branch 5 are connected in parallel; in the closing process of the hybrid switch circuit: the electronic power branch 4 is controlled to be turned on to make the energy absorption branch 5 commutate and the mechanical branch 3 is controlled to be turned on; in the opening process of the hybrid switch circuit: the mechanical branch 3 is controlled to be turned off, the electronic power branch 4 is controlled to be turned on to make the energy absorption branch 5 commutate; after closing and before opening of the hybrid switch circuit: the mechanical branch 3 is controlled to be turned on, and the electronic power branch 4 is controlled to be turned off, so that the current continuously flows through the mechanical branch 3; the mechanical branch 3 is used to pass through the rated current and the starting stage arc current, the electronic power branch 4 is used to control the energy absorption branch 5 to commutate for fault energy absorption.

[0052] In the present embodiment, the hybrid solid-state circuit breaker is combined by the mechanical switch 1 and the solid-state switch 2, the solid-state switch 2 intervenes when the mechanical switch 1 is closed or opened, the arc energy is introduced into the solid-state switch 2 to play a role of arc extinguishing, the performance of the circuit breaker is improved, meanwhile, the manufacturing cost is not as high as that of the pure solid-state circuit breaker, the cost is saved, in addition, the housing can effectively protect the mechanical switch 1 and the solid-state switch 2 from being damaged.

[0053] Specifically, the mechanical switch 1 can be understood as a mechanical circuit breaker, and the solid-state switch 2 can be understood as a solid-state circuit breaker, but no cooling device is arranged, the electronic components of the solid-state circuit breaker can be intervened when the mechanical circuit breaker is closed or opened, the arc energy is introduced into the power electronic device to play a role of arc extinguishing.

[0054] ​In an optional technical solution of the embodiment, the electronic power branch 4 comprises a power taking circuit and a pulse trigger circuit; the hybrid switch circuit is used for controlling the power taking circuit to be turned on and the pulse trigger circuit to be turned on during the closing process; the hybrid switch circuit is used for controlling the power taking circuit to be turned on and the pulse trigger circuit to be turned on during the opening process; the hybrid switch circuit is used for controlling the power taking circuit to be turned off and the pulse trigger circuit to be turned off after the closing and before the opening; the power taking circuit is used for supplying power for the pulse trigger circuit, and the pulse trigger circuit is used for driving the energy absorption branch 5 to commutate.

[0055] In the embodiment, the power taking circuit is provided with a power taking unit, which can be quickly charged under the action of voltage after being turned on. The pulse trigger circuit makes the IGBT on the electronic power branch 4 be turned on through pulse triggering, and then makes the energy absorption branch 5 start to commutate, so as to improve the performance of the circuit breaker.

[0056] In an optional technical solution of the embodiment, the mechanical switch 1 comprises a rotating shaft 7, a push rod 8, a first switch located on the electronic power branch 4, a second switch located on the electronic power branch 4, a moving contact 9 and a stationary contact 10 located on the mechanical branch 3, and the push rod 8 and the moving contact 9 are connected to the rotating shaft 7; the solid-state switch 2 comprises a circuit board, and the energy absorption branch 5, the power taking circuit and the pulse trigger circuit are located on the circuit board, the first switch is electrically connected to the pulse trigger circuit, and the second switch is electrically connected to the power taking circuit; the push rod 8 is used for actuating the first switch and the second switch.

[0057] In the embodiment, in the closing process, the rotating shaft 7 is rotated to drive the push rod 8 and the moving contact 9 to rotate together, the push rod 8 can actuate the second switch to make the power taking circuit be turned on, the push rod 8 can also actuate the first switch to make the pulse trigger circuit be turned on, and the moving contact 9 can be in contact with the stationary contact 10 to be turned on, so that the rotating shaft 7 drives the push rod 8 and the moving contact 9 to move together, and the structure is simple and the switch is stable.

[0058] In an optional technical solution of the embodiment, the push rod 8 and the moving contact 9 are arranged at intervals along the rotating direction of the rotating shaft 7; in the opening process, the actuating distance between the push rod 8 and the second switch is smaller than the actuating distance between the push rod 8 and the first switch along the rotating direction of the rotating shaft 7.

[0059] In the embodiment, the moving contact 9 and the stationary contact 10 form a switch K, the first switch is Q1, the second switch is Q2, and the energy absorption branch 5 is S1. In the closing process, in the process that the rotating shaft 7 drives the push rod 8 and the moving contact 9 to rotate together, the push rod 8 first actuates Q2 to make the power taking circuit be turned on, then actuates Q1 to make the pulse trigger circuit be turned on, and finally makes K be turned on; in the opening process, in the process that the rotating shaft 7 drives the push rod 8 and the moving contact 9 to rotate together, K is first disconnected, then Q1 is disconnected, and finally Q2 is disconnected. In this way, Q1, Q2 and K have a time sequence in the closing and opening, so as to ensure the effect of absorbing energy.

[0060] In an optional technical solution of the embodiment, the push rod 8 comprises a pushing part 11 and a pair of connecting parts 12, the pushing part 11 is located between the pair of connecting parts 12, and the two ends of the pushing part 11 are connected to the pair of connecting parts 12 respectively, and the pushing part 11 is used for actuating the first switch and the second switch; the pair of connecting parts 12 are connected to the two ends of the shaft of the rotating shaft 7 in the axial direction respectively.

[0061] In the embodiment, the pushing part 11 and the pair of connecting parts 12 are in the form of sheets, the two ends of the pushing part 11 are connected between the pair of connecting parts 12, and the pushing part 11 is located at one end of the connecting part 12, the other end of the connecting part 12 is connected to the end of the rotating shaft 7 in the axial direction, and the moving contact 9 is connected to the side surface of the rotating shaft 7 in the circumferential direction, so that the structure is simple, the connection is stable, and the push rod 8 and the moving contact 9 do not affect each other.

[0062] However, the embodiment is not limited to this, and the push rod 8 can also be in other forms of structures, as long as the requirements can be met, for example, the push rod 8 is in the form of a column, and is directly connected to the side surface of the rotating shaft 7 in the circumferential direction.

[0063] In an optional technical solution of the embodiment, the first switch is a code switch 13; and / or, the second switch is an auxiliary contact 14.

[0064] In the embodiment, the first switch Q1 is the code switch 13, the code switch 13 can control the state of the circuit by actuating the code sheet, the operation is simple and convenient, the code switch 13 adopts a micro switch structure, so that the reliability is high, and the long-term stable work can be ensured, the code switch 13 can be customized according to different circuit requirements, the adaptability is strong, and the application range is wide, in some application scenarios, the code switch 13 can realize a safety protection function, such as overcurrent protection, short circuit protection and the like, so that the safe operation of the equipment can be effectively ensured, the code switch 13 has high flexibility and variability, and a variety of functions can be switched, the code switch 13 is generally designed in an encoding mode, the contact points on the code switch 13 form a unique encoding combination, so that the function corresponding to the code switch 13 can be uniquely identified and represented, the second switch Q2 is the auxiliary contact 14, and the auxiliary contact 14 can realize the monitoring and feedback of the state of the circuit, and protect the related equipment.

[0065] In the embodiment, the energy absorption branch 5 is a MOV branch, and the specific closing timing principle of the hybrid solid-state circuit breaker provided in the embodiment is as follows:

[0066] Q2: Q2 is first turned on, the energy taking circuit is first closed, and the energy taking unit is rapidly charged under the action of the voltage.

[0067] Q1: continue to close, Q1 is actuated, the rising edge signal is received by the pulse trigger circuit, and the IGBT in the pulse trigger circuit is turned on.

[0068] S1: Then S1 in the circuit is started, and is ready for commutation.

[0069] K: The arc generated at the moment of closing is commutated to the MOV branch.

[0070] Finally, the closing is completed, the MOV branch is not commutated, and the current continues to flow through K.

[0071] In the specific closing process, when the moving contact 9 of the mechanical switch 1 is closed, the rotating shaft 7 rotates with the moving contact 9. The rotation of the rotating shaft 7 drives the push rod 8 to move downward in cooperation with the pushing parts 11 of Q1 and Q2. Therefore, Q2 and Q1 can be matched in time sequence, and finally K of the mechanical switch 1 is closed.

[0072] The specific opening timing principle of the hybrid solid-state circuit breaker provided in the embodiment is as follows:

[0073] K: The first breaking occurs when opening, and the energy-taking circuit has been closed.

[0074] S1: Then S1 in the circuit is started, and is ready for commutation to the MOV branch.

[0075] When opening, it is not a simple reverse process. After the moving contact 9 and the static contact 10 are opened, a signal is sent to make the energy-taking circuit work and start commutation. At this time, Q1 and Q2 do not work, and only the pushing part 11 passes through Q1 and Q2 to make Q1 and Q2 return to the state before closing. Finally, several milliseconds after the moving contact 9 and the static contact 10 are opened, the commutation is also completed. In this way, the product completes the commutation when breaking.

[0076] In the optional technical solution of the embodiment, the circuit board is provided with two blocks, which are a first circuit board 17 and a second circuit board 18, and the mechanical switch 1 includes in-out positive and negative terminal wires; the in-out positive terminal wire is electrically connected to the first circuit board 17 through a first lead wire 19, and the in-out negative terminal wire is electrically connected to the second circuit board 18 through a second lead wire 20. The structure is simple, the connection is convenient, and the conduction is stable.

[0077] Specifically, the DIP switch 13 is connected to the first circuit board 17 through a first connecting lead wire 15, and the auxiliary contact 14 is connected to the second circuit board 18 through a second connecting lead wire 16.

[0078] However, the embodiment is not limited to this, and the circuit board can also be provided with one block, that is, the first circuit board 17 and the second circuit board 18 are combined into one block.

[0079] In an optional technical solution of the embodiment, the shell comprises a first shell 21 and a second shell 22; the mechanical switch 1 is arranged in the first shell 21, and the solid-state switch 2 is arranged in the second shell 22. The separate arrangement is convenient for manufacturing, and the first shell 21 and the second shell 22 can be arranged at required positions according to requirements, thereby improving the applicability.

[0080] However, the embodiment is not limited to this, and the mechanical switch 1 and the solid-state switch 2 can share one shell, as long as the requirements are met.

[0081] In an optional technical solution of the embodiment, the side surface of the first shell 21 and the side surface of the second shell 22 are spliced with each other.

[0082] Specifically, the splicing manner of the first shell 21 and the second shell 22 can be left-right splicing, up-down splicing, or front-back splicing, and meanwhile, the first shell 21 and the second shell 22 can also not be spliced, that is, a certain distance is arranged between the first shell 21 and the second shell 22, and in this case, as long as the electrical connection is ensured through the first connecting wire 15, the second connecting wire 16, the first wire 19, and the second wire 20.

[0083] In an optional technical solution of the embodiment, the hybrid solid-state circuit breaker has a single breaking point, or the hybrid solid-state circuit breaker has multiple breaking points. That is, the hybrid solid-state circuit breaker can be a single breaking point circuit breaker, or a multiple breaking point circuit breaker. The multiple breaking points can be double breaking points, but are not limited to this.

[0084] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hybrid solid-state circuit breaker, characterized in that, include: The device includes a housing, a mechanical switch (1), and a solid-state switch (2), both of which are disposed within the housing and are electrically connected to form a hybrid switching circuit. The hybrid switching circuit includes a mechanical branch (3), an electronic power branch (4), and an energy absorption branch (5), and the mechanical branch (3), the electronic power branch (4), and the energy absorption branch (5) are connected in parallel; The hybrid switching circuit is used during the closing process to: control the electronic power branch (4) to conduct so that the energy absorption branch (5) can be commutated and control the mechanical branch (3) to conduct; The hybrid switching circuit is used during the opening process to: control the mechanical branch (3) to disconnect and control the electronic power branch (4) to conduct so that the energy absorption branch (5) can be switched. The hybrid switching circuit is used after closing and before opening: to control the mechanical branch (3) to be turned on and to control the electronic power branch (4) to be turned off, so that the current continues to flow through the mechanical branch (3); The mechanical branch (3) is used to pass the rated current and the initial stage arc current, and the electronic power branch (4) is used to control the commutation of the energy absorption branch (5) for arc energy absorption.

2. The hybrid solid-state circuit breaker according to claim 1, characterized in that, The electronic power branch (4) includes an energy harvesting circuit and a pulse triggering circuit; The hybrid switching circuit is used during the closing process to: control the conduction of the energy harvesting circuit and control the conduction of the pulse triggering circuit; The hybrid switching circuit is used during the opening process to: control the power harvesting circuit to turn on and control the pulse triggering circuit to turn on; The hybrid switching circuit is used after closing and before opening to control the disconnection of the energy harvesting circuit and the pulse triggering circuit. The energy harvesting circuit is used to supply power to the pulse triggering circuit, and the pulse triggering circuit is used to drive the energy absorption branch (5) to commutate.

3. The hybrid solid-state circuit breaker according to claim 2, characterized in that, The mechanical switch (1) includes a rotating shaft (7), a push rod (8), a first switch located on the electronic power branch (4), a second switch located on the electronic power branch (4), a moving contact (9) and a stationary contact (10) located on the mechanical branch (3), and the push rod (8) and the moving contact (9) are both connected to the rotating shaft (7); The solid-state switch (2) includes a circuit board, the energy absorption branch (5), the energy harvesting circuit and the pulse triggering circuit are all located on the circuit board, the first switch is electrically connected to the pulse triggering circuit and the second switch is electrically connected to the energy harvesting circuit; The push rod (8) is used to toggle the first switch and the second switch.

4. The hybrid solid-state circuit breaker according to claim 3, characterized in that, Along the rotation direction of the shaft (7), the push rod (8) and the moving contact (9) are spaced apart; When the circuit is opened, the toggle distance between the push rod (8) and the second switch is less than the toggle distance between the push rod (8) and the first switch along the rotation direction of the rotating shaft (7).

5. The hybrid solid-state circuit breaker according to claim 4, characterized in that, The push rod (8) includes a pushing part (11) and a pair of connecting parts (12). The pushing part (11) is located between the pair of connecting parts (12) and its two ends are respectively connected to the pair of connecting parts (12). The pushing part (11) is used to toggle the first switch and the second switch. The pair of connecting parts (12) are respectively connected to the two ends of the rotating shaft (7) in the axial direction.

6. The hybrid solid-state circuit breaker according to claim 3, characterized in that, The first switch is a DIP switch (13); And / or, the second switch is an auxiliary contact (14).

7. The hybrid solid-state circuit breaker according to claim 3, characterized in that, The circuit board is provided in two parts, namely the first circuit board (17) and the second circuit board (18), and the mechanical switch (1) includes a positive terminal and a negative terminal. The positive terminal is electrically connected to the first circuit board (17) via the first wire (19), and the negative terminal is electrically connected to the second circuit board (18) via the second wire (20).

8. The hybrid solid-state circuit breaker according to any one of claims 1-7, characterized in that, The outer casing includes a first casing (21) and a second casing (22); The mechanical switch (1) is disposed in the first housing (21), and the solid-state switch (2) is disposed in the second housing (22).

9. The hybrid solid-state circuit breaker according to claim 8, characterized in that, The side of the first housing (21) is spliced ​​with the side of the second housing (22).

10. The hybrid solid-state circuit breaker according to any one of claims 1-7, characterized in that, The hybrid solid-state circuit breaker has a single break point, or the hybrid solid-state circuit breaker has multiple break points.

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