Hybrid solid-state circuit breaker

Abstract

The utility model 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 utility model 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 utility model relates to the technical field of circuit breakers, in particular to a hybrid solid-state circuit breaker. Background Art

[0002] Low voltage circuit breaker is an important control and protection device. It is mainly used in AC and DC low voltage power grids. It can not only manually or electrically open and close circuits, but also protect circuits or electrical equipment from overload, short circuit and undervoltage.

[0003] Existing low-voltage circuit breaker products, when used in DC systems, often require multi-pole series connection or amplified arc extinguishing systems to achieve product performance, so traditional products can no longer 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 pure solid-state circuit breakers also require cooling devices, resulting in higher costs, only some small current products (below 80A) can be put into formal application, and there are no large-scale applications.

[0004] Therefore, there is an urgent need to design a circuit breaker that can be applied to DC systems, meet performance requirements, and has low cost. Utility Model Content

[0005] The purpose of the utility model is to provide a hybrid solid-state circuit breaker to solve the technical problems that the existing low-voltage circuit breaker needs multi-pole series connection or an amplified arc extinguishing system to meet the performance requirements when used in a DC system, and that the pure solid-state circuit breaker needs a cooling device, resulting in high costs.

[0006] The utility model provides a hybrid solid-state circuit breaker, comprising: a housing, a mechanical switch and a solid-state switch, wherein the mechanical switch and the solid-state switch are both arranged in the housing, and the mechanical switch is electrically connected to the solid-state switch 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] The hybrid switch circuit is used in the closing process to: control the electronic power branch to conduct so that the energy absorption branch can commutate and control the mechanical branch to conduct;

[0009] The hybrid switch circuit is used in the opening process to: control the mechanical branch to be disconnected, and control the electronic power branch to be turned on so that the energy absorption branch can commutate;

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

[0011] The mechanical branch is used for passing the rated current and the arc current in the initial stage, and the electronic power branch is used for controlling the commutation of the energy absorption branch for fault energy absorption.

[0012] As a further technical solution, the electronic power branch includes an energy extraction circuit and a pulse trigger circuit;

[0013] The hybrid switch circuit is used in the closing process to: control the conduction of the energy taking circuit and the conduction of the pulse trigger circuit;

[0014] The hybrid switch circuit is used in the opening process to: control the conduction of the energy taking circuit and the conduction of the pulse trigger circuit;

[0015] The hybrid switch circuit is used to control the disconnection of the energy extraction circuit and the disconnection of the pulse trigger circuit after closing and before opening;

[0016] The energy extraction circuit is used to supply power to the pulse trigger circuit, and the pulse trigger circuit is used to drive the energy absorption branch to commutate.

[0017] As a further technical solution, the mechanical switch includes 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 includes a circuit board, the energy absorption branch, the energy extraction 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 energy extraction circuit;

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

[0020] As a further technical solution, along the rotation direction of the rotating shaft, the push rod and the moving contact are arranged at intervals;

[0021] When the switch is opened, along the rotation direction of the rotating shaft, the toggle distance between the push rod and the second switch is smaller than the toggle distance between the push rod and the first switch.

[0022] As a further technical solution, the push rod includes a push portion and a pair of connecting portions, the push portion is located between the pair of connecting portions, and two ends of the push portion are respectively connected to the pair of connecting portions, and the push portion is used to toggle the first switch and the second switch;

[0023] A pair of connecting parts are respectively connected to two ends of the rotating shaft in the axial direction.

[0024] As a further technical solution, the first switch is a dip switch;

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

[0026] As a further technical solution, the circuit board is provided with two pieces, namely a first circuit board and a second circuit board, and the mechanical switch comprises an inlet and outlet positive electrode terminal and an inlet and outlet negative electrode terminal;

[0027] The inlet and outlet positive electrode terminal is electrically connected to the first circuit board through a first wire, and the inlet and outlet negative electrode terminal is electrically connected to the second circuit board through a second wire.

[0028] As a further technical solution, the housing includes a first shell and a second shell;

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

[0030] As a further technical solution, the side surface of the first shell and the side surface of the second shell are spliced ​​with each other.

[0031] As a further technical solution, 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 utility model has the following technical advantages:

[0033] The hybrid solid-state circuit breaker provided by the utility model comprises: a shell, a mechanical switch and a solid-state switch, wherein the mechanical switch and the solid-state switch are both arranged in the shell, and the mechanical switch is electrically connected to the solid-state switch 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; the hybrid switch circuit is used in the process of closing the switch: controlling the electronic power branch to conduct so that the energy absorption branch can be switched and controlling the mechanical branch to conduct; the hybrid switch circuit is used in the process of opening the switch: controlling the mechanical branch to be disconnected, controlling the electronic power branch to be turned on so that the energy absorption branch can be switched; the hybrid switch circuit is used after closing the switch and before opening the switch: controlling the mechanical branch to be turned on, controlling the electronic power branch to be disconnected, so that the current can continue to flow through the mechanical branch; the mechanical branch is used to pass the rated current and the arc current in the initial stage, and the electronic power branch is used to control the energy absorption branch to switch for fault energy absorption.

[0034] The hybrid solid-state circuit breaker is a combination of a mechanical switch and a solid-state switch. The solid-state switch intervenes when the mechanical switch is closed or opened, introducing arc energy into the solid-state switch to extinguish the arc, thereby improving the performance of the circuit breaker. At the same time, the manufacturing cost is not as high as that of a pure solid-state circuit breaker, saving costs. In addition, the casing can effectively protect the mechanical switch and the solid-state switch from damage.

[0035] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A layout diagram of a hybrid solid-state circuit breaker provided in an embodiment of the utility model;

[0038] Figure 2 A side cross-sectional view of a mechanical switch provided by an embodiment of the utility model;

[0039] Figure 3 A schematic diagram of a mechanical switch provided by an embodiment of the utility model when closed;

[0040] Figure 4 A schematic diagram of a mechanical switch provided by an embodiment of the utility model when it is open;

[0041] Figure 5A wiring diagram of a mechanical switch and a solid-state switch provided for an embodiment of the utility model;

[0042] Figure 6 A schematic diagram of a hybrid solid-state circuit breaker provided in an embodiment of the utility model;

[0043] Figure 7 A schematic diagram of a hybrid solid-state circuit breaker circuit provided in an embodiment of the utility model.

[0044] Icons: 1-mechanical switch; 2-solid-state switch; 3-mechanical branch; 4-electronic power branch; 5-energy absorption branch; 7-rotating shaft; 8-push rod; 9-moving contact; 10-static contact; 11-pushing part; 12-connecting part; 13-dip switch; 14-auxiliary contact; 15-first connecting wire; 16-second connecting 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 solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

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

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0049] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0050] Specific structure such as Figures 1 to 7 shown.

[0051] The present embodiment provides a hybrid solid-state circuit breaker, comprising: a housing, a mechanical switch 1 and a solid-state switch 2, wherein the mechanical switch 1 and the solid-state switch 2 are both arranged in the housing, and the mechanical switch 1 is electrically connected to the solid-state switch 2 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; the hybrid switch circuit is used in the closing process: controlling the electronic power branch 4 to conduct so that the energy absorption branch 5 commutates and controlling the mechanical branch 3 to conduct; the hybrid switch circuit is used in the opening process: controlling the mechanical branch 3 to disconnect and controlling the electronic power branch 4 to conduct so that the energy absorption branch 5 commutates; the hybrid switch circuit is used after closing and before opening: controlling the mechanical branch 3 to conduct and controlling the electronic power branch 4 to disconnect 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 arc current in the initial stage, and the electronic power branch 4 is used to control the energy absorption branch 5 to commutate for fault energy absorption.

[0052] In this embodiment, the hybrid solid-state circuit breaker is composed of a mechanical switch 1 and a solid-state switch 2. The solid-state switch 2 intervenes when the mechanical switch 1 is closed or opened, and introduces arc energy into the solid-state switch 2 to extinguish the arc, thereby improving the performance of the circuit breaker. At the same time, the manufacturing cost is not as high as that of a pure solid-state circuit breaker, thereby saving costs. In addition, the casing can effectively protect the mechanical switch 1 and the solid-state switch 2 from damage.

[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 provided. The electronic components of the solid-state circuit breaker can intervene when the mechanical circuit breaker is closed or opened, and introduce arc energy into the power electronic device to extinguish the arc.

[0054] In the optional technical solution of this embodiment, the electronic power branch 4 includes an energy extraction circuit and a pulse trigger circuit; the hybrid switch circuit is used in the closing process: controlling the conduction of the energy extraction circuit and the conduction of the pulse trigger circuit; the hybrid switch circuit is used in the opening process: controlling the conduction of the energy extraction circuit and the conduction of the pulse trigger circuit; the hybrid switch circuit is used after closing and before opening: controlling the disconnection of the energy extraction circuit and the disconnection of the pulse trigger circuit; the energy extraction circuit is used to power the pulse trigger circuit, and the pulse trigger circuit is used to drive the energy absorption branch 5 to commutate.

[0055] In this embodiment, an energy acquisition unit is provided on the energy acquisition circuit, which can be quickly charged under the action of voltage after being turned on. The pulse triggering circuit turns on the IGBT on the electronic power branch 4 through pulse triggering, and then the energy absorption branch 5 starts to commutate, thereby improving the performance of the circuit breaker.

[0056] In the optional technical solution of this embodiment, 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 static 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 extraction 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 extraction circuit; the push rod 8 is used to toggle the first switch and the second switch.

[0057] In this embodiment, during the closing process, the push rod 8 and the moving contact 9 are driven to rotate together by the rotation of the rotating shaft 7. The push rod 8 can toggle the second switch to turn on the energy extraction circuit. The push rod 8 can also toggle the first switch to turn on the pulse trigger circuit. The moving contact 9 can contact and turn on the static contact 10. The push rod 8 and the moving contact 9 are driven to move at the same time by the rotating shaft 7. The structure is simple and the switch is stable.

[0058] In the optional technical solution of this embodiment, the push rod 8 and the moving contact 9 are arranged at intervals along the rotation direction of the rotating shaft 7; when the switch is opened, along the rotation direction of the rotating shaft 7, the toggle distance between the push rod 8 and the second switch is smaller than the toggle distance between the push rod 8 and the first switch.

[0059] In this embodiment, the moving contact 9 and the static contact 10 form a switch K, the first switch is Q1, the second switch is Q2, and the energy absorption branch 5 is S1. During the closing process, the shaft 7 drives the push rod 8 and the moving contact 9 to rotate simultaneously, and the push rod 8 first turns Q2 to turn on the energy extraction circuit, then turns Q1 to turn on the pulse trigger circuit, and finally turns on K; during the opening process, the shaft 7 drives the push rod 8 and the moving contact 9 to rotate simultaneously, and first disconnects K, then disconnects Q1, and finally disconnects Q2. In this way, Q1, Q2 and K have a time sequence when closing and opening, ensuring the effect of energy absorption.

[0060] In the optional technical solution of this embodiment, the push rod 8 includes a push portion 11 and a pair of connecting portions 12. The push portion 11 is located between the pair of connecting portions 12, and both ends are respectively connected to the pair of connecting portions 12. The push portion 11 is used to toggle the first switch and the second switch; the pair of connecting portions 12 are respectively connected to the two ends of the rotating shaft 7 in the axial direction.

[0061] In this embodiment, the push portion 11 and the pair of connecting portions 12 are both sheet-shaped, and the two ends of the push portion 11 are connected between the pair of connecting portions 12 and are located at one end of the connecting portion 12. The other end of the connecting portion 12 is connected to the axial end of the rotating shaft 7, and the moving contact 9 is connected to the circumferential side of the rotating shaft 7. The structure is simple and the connection is stable. At the same time, the push rod 8 and the moving contact 9 do not affect each other.

[0062] However, the present embodiment is not limited thereto, and the push rod 8 may also be a structure of other forms as long as it can meet the requirements. For example, the push rod 8 is columnar and directly connected to the side surface of the rotating shaft 7 in the circumferential direction.

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

[0064] In this embodiment, the first switch Q1 is preferably a dip switch 13, which can control the state of the circuit by toggling the code chip, and the operation is simple and convenient; the dip switch 13 adopts a micro switch structure, so it has high reliability and can ensure long-term stable operation; the dip switch 13 can be customized according to different circuit requirements, with strong adaptability and a wide range of applications; in certain application scenarios, the dip switch 13 can realize safety protection functions, such as overcurrent protection, short circuit protection, etc., to effectively ensure the safe operation of the equipment; the dip switch 13 has high flexibility and variability, and can realize the switching of multiple functions; the dip switch 13 is generally designed in a coding manner, and the contacts on the dial position will form a unique coding combination, so that the function corresponding to the dip switch 13 can be uniquely identified and indicated. The second switch Q2 is an auxiliary contact 14, which can realize the monitoring and feedback of the circuit state and protect related equipment.

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

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

[0067] Q1: Continue to close the switch, Q1 is turned on, the pulse trigger circuit receives the rising edge signal, and the IGBT in the pulse trigger circuit is turned on.

[0068] S1: Then S1 in the circuit starts and prepares for commutation.

[0069] K: The arc generated instantly when closing the circuit breaker is commutated to the MOV branch.

[0070] Finally, the circuit breaker is closed, the MOV branch does not commutate, 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 together with the moving contact 9. The rotation of the rotating shaft 7 drives the push rod 8 to move downward in coordination with the push portion 11 of Q1 and Q2. Therefore, Q2 and Q1 can be coordinated 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 this embodiment is as follows:

[0073] K: It is disconnected first when opening the switch, and the energy extraction circuit is already closed.

[0074] S1: Then S1 in the circuit starts and commutates to the MOV branch.

[0075] When opening the switch, it is not a simple reverse process. After the moving contact 9 and the static contact 10 are opened, there is a signal to make the energy-taking circuit work and start commutation. At this time, Q1 and Q2 are not working, but the push part 11 passes through Q1 and Q2 to make Q1 and Q2 return to the state before closing. Finally, a few 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 during disconnection.

[0076] In the optional technical solution of this embodiment, two circuit boards are provided, namely a first circuit board 17 and a second circuit board 18, and the mechanical switch 1 includes an inlet and outlet positive terminal and an inlet and outlet negative terminal; the inlet and outlet positive terminal is electrically connected to the first circuit board 17 through a first wire 19, and the inlet and outlet negative terminal is electrically connected to the second circuit board 18 through a second wire 20. The structure is simple, the connection is convenient, and the conductivity is stable.

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

[0078] However, the present embodiment is not limited thereto, and the circuit board may also be provided as one piece, that is, the first circuit board 17 and the second circuit board 18 are combined into one piece.

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

[0080] However, the present embodiment is not limited thereto, and the mechanical switch 1 and the solid-state switch 2 may also share a housing as long as the requirements are met.

[0081] In an optional technical solution of this 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 first shell 21 and the second shell 22 can be spliced ​​left to right, up to down, or front to back. At the same time, the first shell 21 and the second shell 22 may not be spliced, that is, a certain distance is set between the first shell 21 and the second shell 22. At this time, the electrical connection can be ensured by a certain length of the first connecting wire 15, the second connecting wire 16, the first wire 19 and the second wire 20.

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

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A hybrid solid-state circuit breaker, characterized in that: include: A housing, a mechanical switch (1) and a solid-state switch (2), wherein 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; The hybrid switch circuit is used in the closing process to: control the electronic power branch (4) to be turned on so that the energy absorption branch (5) can be commutated and control the mechanical branch (3) to be turned on; The hybrid switch circuit is used in the opening process to: control the mechanical branch (3) to be disconnected, and control the electronic power branch (4) to be turned on so that the energy absorption branch (5) can be commutated; The hybrid switch circuit is used to control the mechanical branch (3) to be turned on and the electronic power branch (4) to be turned off after the switch is closed and before the switch is opened, 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 arc current in the initial stage, 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) comprises an energy extraction circuit and a pulse triggering circuit; The hybrid switch circuit is used in the closing process to: control the conduction of the energy taking circuit and the conduction of the pulse trigger circuit; The hybrid switch circuit is used in the opening process to: control the conduction of the energy taking circuit and the conduction of the pulse trigger circuit; The hybrid switch circuit is used to control the disconnection of the energy extraction circuit and the disconnection of the pulse trigger circuit after closing and before opening; The energy extraction circuit is used to supply power to the pulse trigger circuit, and the pulse trigger 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) 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 both connected to the rotating shaft (7); The solid-state switch (2) comprises a circuit board, the energy absorption branch (5), the energy extraction 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 energy extraction 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 rotating shaft (7), the push rod (8) and the moving contact (9) are arranged at intervals; When the switch is opened, along the rotation direction of the rotating shaft (7), the toggle distance between the push rod (8) and the second switch is smaller than the toggle distance between the push rod (8) and the first switch.

5. The hybrid solid-state circuit breaker according to claim 4, characterized in that: The push rod (8) comprises a push portion (11) and a pair of connecting portions (12), wherein the push portion (11) is located between the pair of connecting portions (12) and two ends are respectively connected to the pair of connecting portions (12), and the push portion (11) is used to toggle the first switch and the second switch; A pair of connecting parts (12) are respectively connected to 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 boards are provided with two pieces, namely a first circuit board (17) and a second circuit board (18), and the mechanical switch (1) comprises an inlet and outlet positive electrode connection terminal and an inlet and outlet negative electrode connection terminal; The inlet and outlet positive electrode connection terminals are electrically connected to the first circuit board (17) via a first wire (19), and the inlet and outlet negative electrode connection terminals are electrically connected to the second circuit board (18) via a second wire (20).

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

9. The hybrid solid-state circuit breaker according to claim 8, characterized in that: The side surface of the first shell (21) and the side surface of the second shell (22) are spliced ​​with each other.

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

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