Electrical protection device

Abstract

The utility model discloses an electrical protection device, which relates to the technical field of electrical protection devices, and comprises a shell, a weak current component and a strong current component, a strong current cavity and a weak current cavity are arranged in the shell at intervals, the weak current component is arranged in the weak current cavity, the strong current component is arranged in the strong current cavity, and the weak current component is arranged in the strong current cavity. The strong current component comprises a moving contact assembly, a static contact assembly and a function module. The function module and the static contact assembly are arranged on two opposite sides of the moving contact assembly. According to the technical scheme, the strong current cavity and the weak current cavity are arranged in the shell at intervals, then the weak current component is arranged in the weak current cavity, and the strong current component is arranged in the strong current cavity. The strong current cavity and the weak current cavity are isolated from each other, so that the strong current component in the strong current cavity and the weak current component in the weak current cavity are isolated from each other in space, the electromagnetic interference between the strong current component and the weak current component in the electrical protection device is reduced, and the normal operation of the strong current component and the weak current component is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical protection devices, in particular to an electrical protection device. Background Art

[0002] In the field of electrical protection, electrical protection devices are often required to connect, carry or disconnect currents in normal circuits and abnormal circuits.

[0003] However, the existing electrical protection devices mix the strong current components and the weak current components, which cause electromagnetic interference between the strong current components and the weak current components, thereby affecting the normal operation of the strong current components and the weak current components. Utility Model Content

[0004] The main purpose of the utility model is to provide an electrical protection device, which aims to solve the problem that the existing electrical protection device overlaps the strong current components and the weak current components, causing overheating and damage to the strong current components, affecting the damage to the weak current components and resulting in poor safety performance.

[0005] In order to achieve the above-mentioned purpose, the electrical protection device proposed by the utility model comprises:

[0006] A housing, wherein a strong current chamber and a weak current chamber are arranged in the housing at intervals;

[0007] Weak current components, which are arranged in the weak current cavity; and

[0008] A strong electric component is arranged in the strong electric cavity, and the strong electric component comprises a moving contact assembly, a static contact assembly and a functional module. The functional module and the static contact assembly are arranged on two opposite sides of the moving contact assembly.

[0009] In one embodiment, the shell includes a high-current protective shell and an outer shell, the high-current protective shell is installed on the outer shell, the interior of the high-current protective shell protrudes to form the high-current cavity, and the inner wall of the outer shell and the outer wall of the high-current protective shell are combined to form the low-current cavity.

[0010] In one embodiment, the outer shell includes four interconnected inner side walls and an inner bottom wall, a first weak-current cavity is provided between the inner bottom wall of the outer shell and the outer bottom wall of the strong-current protective shell, the three inner side walls of the outer shell and at least one outer side wall of the strong-current protective shell are combined to form a second weak-current cavity, and the second weak-current cavity is communicated with the first weak-current cavity; the weak-current components include a power supply and a circuit board, the power supply is installed on the circuit board, the circuit board is installed in the first weak-current cavity, and part of the structure is exposed in the second weak-current cavity.

[0011] In one embodiment, the moving contact assembly includes an operating mechanism, a tripping mechanism and an electromagnetic driver, the operating mechanism, the tripping mechanism and the electromagnetic driver are all arranged in the high-voltage chamber, and the electromagnetic driver and the static contact assembly are arranged on opposite sides of the operating mechanism, the tripping mechanism is located above the static contact and is spaced apart from the static contact assembly.

[0012] In one embodiment, the static contact assembly includes a trip protector, a static contact and an arc extinguishing grid, the trip protector is arranged below the trip mechanism, and the trip protector, the static contact and the arc extinguishing grid are installed in the high-voltage cavity from top to bottom in sequence, and the arc extinguishing grid abuts against the inner wall of the high-voltage protection shell.

[0013] In one embodiment, the functional modules include:

[0014] A current sensor, which is disposed in the high-voltage chamber and is used to detect the current of the loop; and

[0015] A leakage transformer, the leakage transformer is located in the high-voltage chamber, and the leakage transformer is spaced apart from the current sensor, and the leakage transformer is used to detect leakage current in the loop.

[0016] In one embodiment, the high-voltage component further includes an outgoing terminal and an incoming terminal, wherein the outgoing terminal is arranged on the housing and is close to the static contact assembly, and the incoming terminal is arranged on the housing and is close to the functional module.

[0017] In one embodiment, the weak-current component further includes a communication module, and the communication module is electrically connected to the circuit board.

[0018] In one embodiment, a plurality of limiting structures are protruding from a side of the high-current protection shell facing away from the moving contact assembly. The plurality of limiting structures and the shell are combined to form a first weak-current cavity, and the weak-current components are limitedly installed in the first weak-current cavity.

[0019] In one embodiment, a buckle is installed on the outside of the shell.

[0020] In one embodiment, the housing includes a bottom shell and a cover plate, the high-voltage protection shell is installed on the bottom shell, a low-voltage cavity is provided between the high-voltage protection shell and the bottom shell, and the cover plate covers the bottom shell.

[0021] The technical solution of the utility model is to arrange a strong current cavity and a weak current cavity at intervals in a shell, and then arrange the weak current components in the weak current cavity and the strong current components in the strong current cavity; since the strong current cavity and the weak current cavity are isolated from each other, the strong current components in the strong current cavity and the weak current components in the weak current cavity are spatially isolated from each other, thereby reducing the electromagnetic interference between the strong current components and the weak current components in the electrical protection device, and ensuring the normal operation of the strong current components and the weak current components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of an embodiment of an electrical protection device provided by the utility model;

[0024] Figure 2 A schematic diagram of the structure of an embodiment of an electrical protection device provided by the utility model;

[0025] Figure 3 A schematic diagram of the structure of an embodiment of the electrical protection device provided by the utility model when no power supply and circuit board are installed;

[0026] Figure 4 The present invention is a schematic diagram of the exploded structure of an embodiment of the electrical protection device provided by the utility model when a cover plate is not installed.

[0027] Description of Figure Numbers:

[0028] 100, electrical protection device; 10, housing; 20, outer shell; 21, weak current cavity; 211, first weak current cavity; 212, second weak current cavity; 22, inner side wall of outer shell; 23, inner bottom wall of outer shell;

[0029] 30. Strong electric protection shell; 31. Strong electric cavity; 32. Limiting structure;

[0030] 40. Weak current components; 42. Circuit boards;

[0031] 50. Strong current components; 51. Moving contact assembly; 511. Operating mechanism; 512. Tripping mechanism; 513. Electromagnetic driver; 52. Static contact assembly; 521. Tripping protector; 522. Static contact; 523. Arc extinguishing grid; 53. Functional module; 531. Current sensor; 532. Leakage transformer; 54. Incoming terminal; 55. Outgoing terminal;

[0032] 60. Buckle.

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. 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 utility model.

[0037] The existing electrical protection device 100 mixes the strong current components and the weak current components, and the strong current components and the weak current components cause electromagnetic interference, thereby affecting the normal operation of the strong current components and the weak current components.

[0038] The utility model provides an electrical protection device 100. Please refer to Figures 1 to 3 In one embodiment of the present utility model, the electrical protection device 100 provided by the present utility model includes:

[0039] The housing 10 includes a strong current chamber 31 and a weak current chamber 21 arranged therein;

[0040] Weak current components 40, which are arranged in the weak current cavity 21; and

[0041] The strong electric component 50 is arranged in the strong electric cavity 31 . The strong electric component 50 includes a moving contact assembly 51 , a stationary contact assembly 52 and a functional module 53 . The functional module 53 and the stationary contact assembly 52 are arranged on opposite sides of the moving contact assembly 51 .

[0042] The functional module 53 is installed in the high-voltage cavity 31 of the high-voltage protective shell 30. The functional module 53 may include a current sensor 531 and a leakage transformer 532. The current sensor 531 is used to detect the current of the loop, and the leakage transformer 532 is used to detect the leakage current of the loop.

[0043] In one embodiment, the strong current component 50 is installed in the strong current cavity 31, and the weak current component 40 is installed in the weak current cavity 21, and the strong current cavity 31 and the weak current cavity 21 are spaced apart so that the strong current component 50 can be isolated from the weak current component 40 in the space within the shell 10.

[0044] In order to separate the strong current cavity 31 and the weak current cavity 21 in the shell 10, a shielding plate can be set in the shell 10, and the shielding plate isolates the strong current cavity 31 from the weak current cavity 21; or a separate strong current protective shell 30 can be set in the shell 10, and the strong current protective shell 30 is provided with the strong current cavity 31, and the weak current cavity 21 in the shell 10 and the strong current cavity 31 in the strong current protective shell 30 are isolated from each other.

[0045] The electrical protection device 100 of the present invention arranges the strong current cavity 31 and the weak current cavity 21 in the shell 10 at intervals, and the strong current components 50 in the strong current cavity 31 and the weak current components 40 in the weak current cavity 21 are spatially isolated from each other, thereby reducing the electromagnetic interference between the strong current components 50 and the weak current components 40 in the electrical protection device 100 and ensuring the normal operation of the strong current components 50 and the weak current components 40.

[0046] The high-voltage components 50 in the high-voltage cavity 31 include a moving contact assembly 51, a stationary contact assembly 52 and a functional module 53, and the functional module 53 and the stationary contact assembly 52 are arranged on two opposite sides of the moving contact assembly 51. The three mechanisms of the moving contact assembly 51, the stationary contact assembly 52 and the functional module 53 can be independent of each other for easy assembly.

[0047] See also Figure 2 and Figure 3In order to shield the electromagnetic interference between the strong current components 50 and the weak current components 40 and ensure the normal operation of the weak current components 40, in one embodiment, the shell 10 includes a strong current protection shell 30 and an outer shell 20. The strong current protection shell 30 is installed on the outer shell 20. The inner part of the strong current protection shell 30 protrudes to form a strong current cavity 31. The inner wall of the outer shell 20 and the outer wall of the strong current protection shell 30 enclose the weak current cavity 21.

[0048] Specifically, a strong current cavity 31 is directly formed inside the strong current protection shell 30. An accommodating cavity is provided inside the outer shell 20, and the strong current protection shell 30 is installed in the outer shell 20. A part of the accommodating cavity in the outer shell 20 is occupied by the strong current protection shell 30, and the other part is not occupied by the strong current protection shell 30. Among them, the space occupied by the strong current protection shell 30 in the outer shell 20 can be a strong current cavity 31 for fixing the moving contact assembly 51 and the functional module 53, and the space not occupied by the strong current protection shell 30 in the outer shell 20 can be a weak current cavity 21 for fixing the weak current components 40.

[0049] Then, the strong electric component 50 is installed in the strong electric cavity 31 in the strong electric protective shell 30, and the weak electric component 40 is installed in the space in the housing 20 not occupied by the strong electric protective shell 30. In this way, the strong electric component 50 and the weak electric component 40 are isolated by the strong electric protective shell 30, so that the strong electric component 50 and the weak electric component 40 are physically separated in space. The strong electric protective shell 30 can shield the electromagnetic interference between the strong electric component 50 and the weak electric component 40, and ensure the normal operation of the strong electric component 50 and the weak electric component 40.

[0050] Furthermore, the strong electric protection shell 30 can be configured as a semi-enclosed protective shell, and the strong electric protection shell 30 is used to fix the strong electric components 50 and isolate the strong electric components 50 from the weak electric components 40, and also facilitate the heat dissipation of the strong electric components 50 in the strong electric protection shell 30. Specifically, the strong electric protection shell 30 includes a plurality of interconnected side panels and a bottom plate, and the plurality of side panels and the bottom plate enclose a semi-enclosed strong electric cavity 31, and the strong electric components 50 are installed on the bottom plate.

[0051] Since the high-current cavity 31 is formed in the high-current protective shell 30, the high-current protective shell 30 can isolate the low-current components 40 in the low-current cavity 21 from the high-current components 50 in the high-current cavity 31, thereby improving the protection performance of the high-current components 50 in the high-current cavity 31 and preventing the high-current components 50 in the high-current cavity 31 from being damaged by being bumped into by other components.

[0052] See also Figures 2 to 4In order to fix the weak current component 40 in the weak current cavity 21 of the shell 20, in one embodiment, the shell 20 includes four interconnected inner side walls 22 and an inner bottom wall 23, and a first weak current cavity 211 is provided between the inner bottom wall 23 of the shell 20 and the outer bottom wall of the strong current protection shell 30. The three inner side walls 22 of the shell 20 and at least one outer side wall of the strong current protection shell 30 enclose a second weak current cavity 212, and the first weak current cavity 211 and the second weak current cavity 212 are connected. The weak current component 40 includes a power supply and a circuit board 42, the power supply is installed on the circuit board 42, the circuit board 42 is provided in the first weak current cavity 211, and part of the structure is exposed in the second weak current cavity 212. The circuit board 42 is limited between the shell 20 and the strong current protection shell 30, so that the circuit board 42 is not easy to shift in the shell 20. And the strong current protection shell 30 can shield the electromagnetic interference between the strong current component 50 and the circuit board 42 to ensure the normal operation of the circuit board 42.

[0053] Since the circuit board 42 in the existing electrical protection device 100 relies on the matching DC power supply, it is difficult to install the electrical protection device 100 in other environments. In this embodiment, the power supply is installed on the circuit board 42, and the power supply can be used to supply power to the circuit board 42. The circuit board 42 can work normally without relying on the DC power supply. The electrical protection device 100 can be installed in different environments and has a wider range of applications.

[0054] The moving contact assemblies 51 in the existing electrical protection device 100 are installed in an overlapping manner, and multiple mechanisms need to be assembled into a whole before they can be installed in the electrical protection device 100, which makes assembly difficult; and when maintenance and replacement of parts are required, the components of multiple mechanisms also need to be dismantled and replaced, resulting in high maintenance costs.

[0055] See also Figure 2 and Figure 3 In one embodiment of the utility model, the moving contact assembly 51 includes an operating mechanism 511, a tripping mechanism 512 and an electromagnetic driver 513. The operating mechanism 511, the tripping mechanism 512 and the electromagnetic driver 513 are all arranged in the high-voltage chamber 31, and the electromagnetic driver 513 and the static contact assembly 52 are arranged on opposite sides of the operating mechanism 511. The tripping mechanism 512 is located above the static contact 522 and is spaced apart from the static contact assembly 52.

[0056] Specifically, in the high-voltage protection shell 30, the electromagnetic driver 513 is installed on the upper side of the operating mechanism 511, and then the static contact assembly 52 is installed on the lower side of the operating mechanism 511. In this way, the electromagnetic driver 513, the operating mechanism 511 and the static contact assembly 52 are independently arranged in the high-voltage protection shell 30. During assembly, the three mechanisms can be assembled independently, and there is no need to assemble the three mechanisms into a whole and then assemble them into the high-voltage cavity 31, which reduces the difficulty of assembly. When repairing and replacing parts, one of the mechanisms can also be disassembled and replaced without disassembling other mechanisms, which reduces the maintenance cost.

[0057] In order to stack and install multiple parts so that the multiple parts are independent of each other, in one embodiment, the static contact assembly 52 includes a trip protector 521, a static contact 522 and an arc extinguishing grid 523, the trip protector 521 is arranged below the trip mechanism 512, and the trip protector 521, the static contact 522 and the arc extinguishing grid 523 are sequentially installed in the high-voltage cavity 31 from top to bottom, and the arc extinguishing grid 523 abuts against the inner wall of the high-voltage protection shell 30. The trip protector 521, the static contact 522 and the arc extinguishing grid 523 are stacked and installed in the high-voltage cavity 31, with a clear layout and convenient maintenance. Moreover, the three parts of the trip protector 521, the static contact 522 and the arc extinguishing grid 523 are independent of each other, and do not need to be assembled into a static contact assembly 52 before they can be assembled into the high-voltage cavity 31, and the difficulty of assembly is reduced.

[0058] In one embodiment, the functional module 53 includes a current sensor 531 and a leakage transformer 532. The current sensor 531 is arranged in the strong electric chamber 31, and the current sensor 531 is used to detect the current of the loop. The leakage transformer 532 is located in the strong electric chamber 31, and the leakage transformer 532 is arranged at a distance from the current sensor 531, and the leakage transformer 532 is used to detect the leakage current of the loop. The leakage transformer 532 can be arranged below the electromagnetic sensor, and the current sensor 531 is arranged on the side of the leakage transformer 532 away from the operating mechanism 511. The leakage transformer 532 and the current sensor 531 are independent of each other, which is convenient for installation, maintenance and replacement.

[0059] Furthermore, in order to facilitate the limiting of multiple components in the high-voltage protection shell 30, a plurality of limiting protrusions are protruding from the high-voltage protection shell 30, and the plurality of limiting protrusions can be arranged corresponding to the trip protector 521, the static contact 522, the arc extinguishing grid 523, the electromagnetic driver 513, the current sensor 531 and the leakage transformer 532, so that the trip protector 521, the static contact 522, the arc extinguishing grid 523, the electromagnetic driver 513, the current sensor 531 and the leakage transformer 532 and other components are limited in the high-voltage protection shell 30.

[0060] Among them, the high-voltage component 50 also includes an outgoing terminal 55 and an incoming terminal 54 . The outgoing terminal 55 is arranged in the housing 20 and is close to the static contact assembly 52 . The incoming terminal 54 is arranged in the housing 20 and is close to the functional module 53 .

[0061] In one embodiment, the incoming terminal 54 can be installed in the housing 20 and arranged near the current sensor 531. The incoming terminal 54 can abut against the side plate of the strong current protection shell 30. The outgoing terminal 55 can be installed in the housing 20 and arranged near the static contact 522. The outgoing terminal 55 and the incoming terminal 54 are arranged on both sides of the strong current protection shell 30, one on the left and one on the right, with a clear layout.

[0062] In one embodiment, the weak current component 40 further includes a communication module, and the communication module is electrically connected to the circuit board 42. The communication module can be installed on the circuit board 42 and located in the second weak current cavity 212. It can also be installed outside the housing 10 and electrically connected to the circuit board 42. Among them, the communication module can use an existing communication device to communicate data between the electrical protection device 100 and the outside.

[0063] See also Figure 2 and Figure 4 In order to fix the circuit board 42 in the weak-current component 40 between the outer shell 20 and the strong-current protective shell 30, in one embodiment, a plurality of limiting structures 32 are protruding from a side of the strong-current protective shell 30 away from the moving contact assembly 51. The plurality of limiting structures 32 and the outer shell 20 are combined to form a first weak-current cavity 211, and the weak-current component 40 is limitedly installed in the first weak-current cavity 211.

[0064] Among them, multiple limiting structures 32 are protruding from the edge of the high-current protective shell 30, and the multiple limiting structures 32 are enclosed to form a slot that can be used to fix the circuit board 42. The shell 20 is installed on the high-current protective shell 30, and the multiple limiting structures 32 and the shell 20 are enclosed to form a first weak-current cavity 211.

[0065] When the circuit board 42 needs to be installed in the first weak-current cavity 211, the circuit board 42 can be first installed on the back of the strong-current protective shell 30, and the circuit board 42 is located in the card slot; then the strong-current protective shell 30 and the outer shell 20 can be snapped together, and the circuit board 42 is fixed in the first weak-current cavity 211, and the strong-current protective shell 30 and the outer shell 20 can limit the circuit board 42.

[0066] In order to facilitate installation of the electrical protection device 100 in an external environment, a buckle 60 is installed on the outside of the housing 10 .

[0067] In one embodiment, a metal buckle 60 is installed at the bottom of the housing 20 to install the electrical protection device 100 in an external environment. The housing 20 may include a bottom shell and a cover plate, the strong current protection shell 30 is installed on the bottom shell, a weak current cavity 21 is provided between the strong current protection shell 30 and the bottom shell, and the cover plate covers the bottom shell.

[0068] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electrical protection device, characterized in that: include: A housing, wherein a strong current chamber and a weak current chamber are arranged in the housing at intervals; Weak current components, which are arranged in the weak current cavity; and A strong electric component is arranged in the strong electric cavity, and the strong electric component comprises a moving contact assembly, a static contact assembly and a functional module. The functional module and the static contact assembly are arranged on two opposite sides of the moving contact assembly.

2. The electrical protection device according to claim 1, characterized in that: The shell comprises a high-voltage protection shell and an outer shell, wherein the high-voltage protection shell is installed on the outer shell, the inner portion of the high-voltage protection shell protrudes to form the high-voltage cavity, and the inner wall of the outer shell and the outer wall of the high-voltage protection shell enclose the low-voltage cavity.

3. The electrical protection device according to claim 2, characterized in that: The outer shell includes four interconnected inner side walls and an inner bottom wall, a first weak-current cavity is provided between the inner bottom wall of the outer shell and the outer bottom wall of the strong-current protective shell, the three inner side walls of the outer shell and at least one outer side wall of the strong-current protective shell are combined to form a second weak-current cavity, and the second weak-current cavity is communicated with the first weak-current cavity; the weak-current components include a power supply and a circuit board, the power supply is installed on the circuit board, the circuit board is installed in the first weak-current cavity, and part of the structure is exposed in the second weak-current cavity.

4. The electrical protection device according to claim 2, characterized in that: The moving contact assembly includes an operating mechanism, a tripping mechanism and an electromagnetic driver. The operating mechanism, the tripping mechanism and the electromagnetic driver are all arranged in the high-voltage chamber, and the electromagnetic driver and the static contact assembly are arranged on two opposite sides of the operating mechanism. The tripping mechanism is located above the static contact and is spaced apart from the static contact assembly.

5. The electrical protection device according to claim 4, characterized in that: The static contact assembly includes a trip protector, a static contact and an arc extinguishing grid. The trip protector is arranged below the trip mechanism, and the trip protector, the static contact and the arc extinguishing grid are installed in the high-voltage cavity from top to bottom in sequence, and the arc extinguishing grid abuts against the inner wall of the high-voltage protection shell.

6. The electrical protection device according to any one of claims 2 to 5, characterized in that: The functional modules include: A current sensor, which is disposed in the high-voltage chamber and is used to detect the current of the loop; and A leakage transformer, the leakage transformer is located in the high-voltage chamber, and the leakage transformer is spaced apart from the current sensor, and the leakage transformer is used to detect leakage current in the loop.

7. The electrical protection device according to any one of claims 2 to 5, characterized in that: The high-voltage component further includes an outlet terminal and an inlet terminal. The outlet terminal is arranged on the housing and is close to the stationary contact assembly. The inlet terminal is arranged on the housing and is close to the functional module.

8. The electrical protection device according to claim 3, characterized in that: The weak-current components further include a communication module, and the communication module is connected to the circuit board by electrical signals.

9. The electrical protection device according to any one of claims 3 to 5, characterized in that: A plurality of limiting structures are protruding from one side of the high-voltage protection shell away from the moving contact assembly. The plurality of limiting structures and the shell are combined to form a first weak-voltage cavity. The weak-voltage components are limitedly installed in the first weak-voltage cavity.

10. The electrical protection device according to any one of claims 1 to 5, characterized in that: A buckle is installed on the outside of the shell.

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