Solid state circuit breaker

Abstract

The invention discloses a solid-state circuit breaker, mechanical breakpoints of the solid-state circuit breaker adopt modular layout, and the solid-state circuit breaker comprises a shell module which forms a cavity for accommodating components of the solid-state circuit breaker; the breaking unit module is arranged in the shell module and comprises a static contact fixed relative to the shell module and a moving contact capable of moving relative to the static contact so as to realize connection and disconnection of a circuit; the mechanism module is arranged in the shell module and is configured to drive the breaking unit module to act; the transmission module is configured to be connected with the mechanism module and the breaking unit module, so that movement of a moving part in the mechanism module can be transmitted to a moving contact of the breaking unit module, and the shell module, the mechanism module, the breaking unit module and the transmission module are separated from one another. Mutual mounting and dismounting can be realized. The solid-state circuit breaker is modularized, the installation process is simple, switching of different application requirements is facilitated, and maintenance and replacement of internal parts are more convenient.

Description

Technical Field

[0001] The present invention relates to a solid-state circuit breaker and a method for installing the solid-state circuit breaker. Background Art

[0002] Solid-state circuit breakers use the principles of electronic components to control the opening and closing of circuits. They are suitable for various AC and DC applications due to their advantages of short breaking time, no arcing during breaking, long electrical life, and no noise. The standard requires that solid-state circuit breakers that meet isolation conditions must have mechanical breakpoints. The mechanical breakpoints of current solid-state circuit breakers all have an integrated structure, that is, the moving and static contacts, operating handles, etc. are directly installed in the same housing and cannot be separated, which is not conducive to the switching of different application requirements (AC and DC, different levels), nor is it conducive to the maintenance and replacement of internal parts. Summary of the invention

[0003] In view of the above problems, according to a first aspect of the present invention, a solid-state circuit breaker is proposed, characterized in that the mechanical breakpoints of the solid-state circuit breaker adopt a modular layout, including:

[0004] a housing module forming a cavity for accommodating components of the solid-state circuit breaker;

[0005] A disconnecting unit module, installed in the housing module, comprising a stationary contact fixed relative to the housing module and a movable contact movable relative to the stationary contact to achieve connection and disconnection of the circuit;

[0006] a mechanism module, installed in the housing module and configured to drive the action of the disconnecting unit module; and

[0007] a transmission module, configured to connect the mechanism module and the breaking unit module so that the movement of the moving part in the mechanism module can be transmitted to the moving contact of the breaking unit module,

[0008] The housing module, the mechanism module, the disconnecting unit module and the transmission module are separate from each other and can be installed and removed from each other.

[0009] Since the solid-state circuit breaker according to the present invention is modularized, its installation process is simple. Moreover, when installing different solid-state circuit breakers, it is only necessary to select the corresponding module according to, for example, the level and AC / DC application, while the installation steps and methods remain unchanged, which is very conducive to the switching of different application requirements (AC / DC, different levels). In addition, due to modularization, the maintenance and replacement of internal parts are also more convenient.

[0010] The solid-state circuit breaker according to the present invention may have one or more of the following features.

[0011] According to one embodiment, the breaking unit module comprises one or more breaking units, each breaking unit comprising a stationary contact and a corresponding moving contact. The number of breaking units can be selected according to the applicable level.

[0012] According to one embodiment, the solid-state circuit breaker varies according to the number of stages, and the number of breaking units of the breaking unit module depends on the number of stages to which it is applicable.

[0013] According to one embodiment, the solid state circuit breaker varies according to AC applications and DC applications.

[0014] According to one embodiment, when the solid-state circuit breaker is used for DC applications, compared with AC applications, an arc extinguishing grid is provided in the breaking unit module. Since only the arc extinguishing grid can be added without changing other modules, switching is convenient.

[0015] According to one embodiment, the transmission module is a transmission shaft configured to connect the moving part of the mechanism module to the moving contact of the disconnecting unit module and thereby transmit the movement. Other transmission modes can be envisaged.

[0016] According to one embodiment, the mechanism module includes an operating handle, and the operating handle is configured to be actuated to drive the moving member to move, so as to achieve opening and closing. The mechanism module can transmit the movement of the operating handle to the moving contact through the moving member.

[0017] According to one embodiment, the modular layout of the solid-state circuit breaker is applicable to UL products and IEC products.

[0018] According to a second aspect of the present invention, a method for installing the above-mentioned solid-state circuit breaker is provided, comprising the following steps:

[0019] 1) Install a breaking unit in the breaking unit module into the mechanism module;

[0020] 2) Installing a transmission module to connect the mechanism module and the disconnecting unit module;

[0021] 3) Installing the mechanism module, the breaking unit module and the transmission module assembled with each other to a housing module.

[0022] The solid-state circuit breaker according to the present invention adopts a modular layout, and the installation process is simple, which is very conducive to the switching of different application requirements (AC and DC, different levels).

[0023] The method for installing the solid-state circuit breaker according to the present invention may have one or more of the following features.

[0024] According to one embodiment, the breaking unit module comprises more than one breaking unit, and further installation of other breaking units is further included between step 2) and step 3).

[0025] According to one embodiment, step 1) further comprises installing a connecting fixture to fix the fixing part of the disconnecting unit module and the fixing part of the mechanism module.

[0026] According to one embodiment, in step 2), the transmission module connects the moving part of the mechanism module and the moving contact of the disconnecting unit module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0028] Figure 1 is a schematic diagram of a solid-state circuit breaker according to the present invention;

[0029] Figure 2 is a schematic diagram of a housing module of a solid-state circuit breaker according to the present invention;

[0030] Figure 3 is a schematic diagram of a mechanism module of a solid-state circuit breaker according to the present invention;

[0031] Figure 4 is a schematic diagram of a transmission module of a solid-state circuit breaker according to the present invention;

[0032] Figure 5 is a schematic diagram of a disconnecting unit module of a solid-state circuit breaker according to the present invention;

[0033] Figure 6 is a schematic diagram showing the switching between different levels of a solid-state circuit breaker according to the present invention;

[0034] Figure 7 is a schematic diagram showing the solid-state circuit breaker according to the present invention switching between AC application and DC application;

[0035] Figure 8 Is a schematic diagram showing the installation process of the solid-state circuit breaker according to the present invention.

[0036] Reference numerals list

[0037] 10 Housing module

[0038] 20 Organization Module

[0039] 30 Transmission module

[0040] 40 Disconnection Unit Module

[0041] 41 Arc quenching grid DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The present invention is described in detail below by describing exemplary embodiments.

[0045] like Figure 1 As shown, the mechanical breaking points of the solid-state circuit breaker according to the present invention adopt a modular layout. Specifically, the solid-state circuit breaker according to the present invention may include a housing module 10, a breaking unit module 40, a mechanism module 20, and a transmission module 30.

[0046] Figure 2 is a schematic diagram of a housing module 10 of a solid-state circuit breaker according to the present invention, Figure 2 As shown, the housing module 10 forms a cavity for accommodating components of the solid-state circuit breaker, such as a breaking unit module 40, a mechanism module 20, and a transmission module 30, and may also include other components.

[0047] Figure 51 is a schematic diagram of a disconnecting unit module 40 of a solid-state circuit breaker according to the present invention, wherein the disconnecting unit module 40 is installed in a housing module 10 and includes a stationary contact fixed relative to the housing module 10 and a movable contact movable relative to the stationary contact to achieve the connection and disconnection of the circuit. The disconnecting unit module 40 may include one or more disconnecting units, each of which includes a stationary contact and a corresponding movable contact.

[0048] Figure 3 1 is a schematic diagram of a mechanism module 20 of a solid-state circuit breaker according to the present invention, the mechanism module 20 is installed in the housing module 10, and is configured to drive the action of the disconnecting unit module 40. The mechanism module 20 may include an operating handle, and the operating handle is configured to be actuated to drive the moving parts of the mechanism module 20 to move. The mechanism module 20 may also include a bracket, a connecting rod for snapping, a micro switch for capturing the position of the mechanism, an electromagnet for electric operation, etc. The mechanism module 20 is used to realize the opening, closing and tripping functions.

[0049] Figure 4 is a schematic diagram of a transmission module 30 of a solid-state circuit breaker according to the present invention, wherein the transmission module 30 is configured to connect the mechanism module 20 and the breaking unit module 40, so that the movement of the moving parts in the mechanism module 20 can be transmitted to the moving contact of the breaking unit module 40. The transmission module 30 is, for example, a transmission shaft.

[0050] The housing module 10, the mechanism module 20, the disconnecting unit module 40, and the transmission module 30 are independent of each other, that is, they can be separated from other modules as a single module. The housing module 10, the mechanism module 20, the disconnecting unit module 40, and the transmission module 30 can be installed and removed from each other. After installation, when the operating handle of the mechanism module 20 is actuated, its moving parts move accordingly, and the movement of the moving parts is transmitted to the moving contact of the disconnecting unit module 40 through the transmission module 30, and the moving contact moves to engage or separate with the corresponding static contact, thereby realizing the connection and disconnection of the circuit.

[0051] The solid-state circuit breaker according to the present invention adopts a modular layout, especially a modular layout of breaking points, which can be changed according to the number of levels, according to AC applications and DC applications, and is suitable for UL products and IEC products.

[0052] The modular layout of the breakpoints facilitates the quick switching of different pole numbers in different application scenarios, such as Figure 6 As shown, for example, the solid-state circuit breaker according to the present invention can switch the appropriate level according to the rated voltage in a DC application, and the number of the breaking units of the breaking unit module 40 depends on the applicable level. Figure 6 (a) is level 3, with 3 breaking units; (b) is level 2, with 2 breaking units; (c) is level 1, with 1 breaking unit.

[0053] The modular layout allows for quick switching between AC and DC applications. Figure 7 As shown, when the solid-state circuit breaker is used for (b) DC application, compared with (a) AC application, an arc extinguishing grid 41 is provided in the breaking unit of the breaking unit module 40, and only the arc extinguishing grid 41 can be added without changing other modules.

[0054] The modular layout also facilitates quick switching between UL and IEC products.

[0055] According to an embodiment of the solid-state circuit breaker of the present invention, the installation process of each module is as follows: Figure 8 The specific steps are as follows:

[0056] (a) preparing a breaking unit in the breaking unit module 40;

[0057] (b) installing the one breaking unit in the breaking unit module 40 to the mechanism module 20;

[0058] (c) installing a connecting fixture to fix the fixed part of the one breaking unit in the breaking unit module 40 and the fixed part of the mechanism module 20;

[0059] (d) installing the transmission module 30, connecting the moving parts of the mechanism module 20 and the moving contact of the one breaking unit in the breaking unit module 40;

[0060] (e) Installing other breaking units in the breaking unit module 40;

[0061] (f) installing the mechanism module 20, the breaking unit module 40 and the transmission module 30 assembled with each other into the housing module 10;

[0062] (g) Installation is complete.

[0063] Wherein, step (e) is not necessary. When the level of the solid-state circuit breaker is 1, the breaking unit module 40 includes only one breaking unit, and step (e) can be omitted. Figure 8 In the illustrated embodiment, the connection fixing member shown in step (c) is a pin installed from both sides, but it is not limited to this, and other fixing methods can be envisioned. Figure 8 In the illustrated embodiment, the transmission module 30 shown in step (d) is a transmission shaft, but is not limited thereto, and other transmission modes can be envisioned. Step (e) includes assembling the transmission module 30 with the moving contacts of other disconnecting units, so that the movement of the moving parts of the mechanism module 20 is transmitted to the moving contacts of all disconnecting units through the transmission module 30.

[0064] Since the solid-state circuit breaker according to the present invention is modularized, its installation process is simple. Moreover, when installing different solid-state circuit breakers, it is only necessary to select the corresponding module according to, for example, the level and AC / DC application, while the installation steps and methods remain unchanged, which is very conducive to the switching of different application requirements (AC / DC, different levels). In addition, due to modularization, the maintenance and replacement of internal parts are also more convenient.

[0065] The exemplary implementation of the solid-state circuit breaker and the method for installing the solid-state circuit breaker proposed in the present invention is described in detail above with reference to the preferred embodiments. However, those skilled in the art will appreciate that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the scope of protection of the present invention.

Claims

1. A solid-state circuit breaker, characterized in that: The mechanical breaking points of the solid-state circuit breaker adopt a modular layout, including: a housing module forming a cavity for accommodating components of the solid-state circuit breaker; A disconnecting unit module, installed in the housing module, comprising a stationary contact fixed relative to the housing module and a movable contact movable relative to the stationary contact to achieve connection and disconnection of the circuit; a mechanism module, installed in the housing module and configured to drive the action of the disconnecting unit module; and a transmission module, configured to connect the mechanism module and the breaking unit module so that the movement of the moving part in the mechanism module can be transmitted to the moving contact of the breaking unit module, The housing module, the mechanism module, the disconnecting unit module and the transmission module are separate from each other and can be installed and removed from each other.

2. The solid-state circuit breaker according to claim 1, wherein: The breaking unit module includes one or more breaking units, and each breaking unit includes a static contact and a corresponding moving contact.

3. The solid-state circuit breaker according to claim 2, wherein: The solid-state circuit breaker varies according to the number of stages, and the number of breaking units of the breaking unit module depends on the applicable number of stages.

4. The solid-state circuit breaker according to any one of claims 1 to 3, wherein: The solid state circuit breaker varies according to AC application and DC application.

5. The solid-state circuit breaker according to any one of claims 1 to 3, wherein: When the solid-state circuit breaker is used for DC applications, compared with AC applications, arc extinguishing grids are provided in the breaking unit module.

6. The solid-state circuit breaker according to any one of claims 1 to 3, wherein: The transmission module is a transmission shaft configured to connect the moving part of the mechanism module to the moving contact of the disconnecting unit module and thereby transmit the motion.

7. The solid-state circuit breaker according to any one of claims 1 to 3, wherein: The mechanism module comprises an operating handle, and the operating handle is configured to be actuated to drive the moving part to move, so as to realize opening and closing of the switch.

8. The solid-state circuit breaker according to any one of claims 1 to 3, wherein: The modular layout of the solid-state circuit breaker is applicable to UL products and IEC products.

9. A method for installing a solid-state circuit breaker according to any one of claims 1 to 8, comprising the following steps: 1) Install a breaking unit in the breaking unit module into the mechanism module; 2) Installing a transmission module to connect the mechanism module and the disconnecting unit module; 3) Installing the mechanism module, the breaking unit module and the transmission module assembled with each other to a housing module.

10. The method according to claim 9, wherein: The breaking unit module includes more than one breaking unit, and further installation of other breaking units is also included between step 2) and step 3).

11. The method according to claim 9 or 10, wherein: Step 1) also includes installing a connecting fixture to fix the fixed part of the disconnecting unit module and the fixed part of the mechanism module.

12. The method according to claim 9 or 10, wherein: In step 2), the transmission module connects the moving parts of the mechanism module and the moving contacts of the disconnecting unit module.

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