Passive large-current actuating device and method

Abstract

The invention discloses a passive large-current actuating device and method and a passive large-current actuating device and method and device.The passive large-current actuating device comprises a movable magnetic conductive block, a magnetic conductive block and an adjustable magnetic conductive block, the movable magnetic conductive block, the magnetic conductive block and the adjustable magnetic conductive block surround a protected current carrier to be connected and form a magnetic conductive loop, and the magnetic conductive block is provided with an empty groove; the movable magnetic conductive block is provided with a spring and an action execution shaft, the spring connects the movable magnetic conductive block to the empty groove, the adjustable magnetic conductive block is movably connected with the magnetic conductive block, and when the magnitude of current passing through a current carrier meets a threshold value, the movable magnetic conductive block moves towards the empty groove. When the movable magnetic conductive block compresses the spring to enter the empty groove, the force of the reset spring is kept unchanged, and meanwhile the movable magnetic conductive block drives the action execution shaft to execute the protection action when moving.

Description

Technical Field

[0001] The present application relates to the field of DC circuit overcurrent protection, and in particular to a passive high current action device and method. Background Art

[0002] In the DC transmission and distribution network, the protection function of the circuit breaker is the most basic functional requirement. Conventional electronic protection, indirect protection and other functions all have the risk of protection function failure. Therefore, the circuit breaker needs to have automatic protection function and passive protection device as the most reliable protection form in the DC transmission and distribution circuit. In the fields of urban rail and nuclear power excitation, as the load current continues to increase, the protection setting value is required to cut off the maximum normal current, which requires the passive protection device to have a larger protection setting value.

[0003] In the related art, the protection device of a conventional circuit breaker is realized by adjusting the return spring of the moving magnetic block. When the protection setting value is large, the spring force will be very large, which may easily cause the moving parts to be subjected to a large deflection force and produce a huge friction force, causing the protection setting value to drift beyond the error range, making the protection function unreliable. Summary of the invention

[0004] In view of the above problems, the present application provides a protection device and method for a circuit breaker to solve the problems existing in the related art.

[0005] The present invention is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a passive high current action device, comprising:

[0007] Dynamic magnetic conductive block, magnetic conductive block and adjustable magnetic conductive block, wherein:

[0008] The dynamic magnetic conductive block, the magnetic conductive block and the adjustable magnetic conductive block are connected around the protected current carrier and form a magnetic conductive circuit;

[0009] The magnetic conductive block is provided with an empty slot, the moving magnetic conductive block is provided with a spring and an action execution shaft, and the spring connects the moving magnetic conductive block to the empty slot;

[0010] The adjustable magnetic conductive block is movably connected to the magnetic conductive block, and when the magnitude of the current passing through the current carrier meets a threshold value, the movable magnetic conductive block moves toward the empty slot.

[0011] In some embodiments, the magnetic conductive block includes: a static magnetic conductive block, the static magnetic conductive block is arranged on both sides of the dynamic magnetic conductive block to form the empty slot, and a accommodating cavity is also arranged at the bottom of the empty slot, and the accommodating cavity is used to store the compressed spring.

[0012] In some embodiments, the passive high current action device further comprises: a housing, the adjustable magnetic conductive block comprises: a coarse adjustment magnetic conductive block and a fine adjustment magnetic conductive block;

[0013] The shell is provided with a coarse adjustment shaft and a fine adjustment shaft, the coarse adjustment magnetic conductive block rotates on the coarse adjustment shaft, the fine adjustment magnetic conductive block rotates on the fine adjustment shaft, and the coarse adjustment magnetic conductive block and the fine adjustment magnetic conductive block are arranged opposite to each other.

[0014] In some embodiments, the magnetic conductive block further comprises: a fixed magnetic conductive block, wherein;

[0015] The fixed magnetic conductive block is arranged opposite to the static magnetic conductive block, the coarse adjustment magnetic conductive block, the fixed magnetic conductive block and the static magnetic conductive block form a first magnetic conductive gap, and the fine adjustment magnetic conductive block, the fixed magnetic conductive block and the static magnetic conductive block form a second magnetic conductive gap.

[0016] In some embodiments, the shell is provided with a U-shaped groove, and when the current passing through the current carrier meets a threshold value, the action execution shaft moves up and down in the U-shaped groove.

[0017] In some embodiments, the moving magnetic block is provided with a guide shaft, the moving magnetic block and the spring move up and down on the guide shaft, and the guide shaft is perpendicular to the action execution axis.

[0018] In some embodiments, the shell includes: a first clamping plate and a second clamping plate, the first clamping plate is provided with a coarse adjustment scale, the coarse adjustment scale is used to adjust the first magnetic conductive gap, and the second clamping plate is provided with a fine adjustment scale, the fine adjustment scale is used to adjust the second magnetic conductive gap.

[0019] In some embodiments, the moving magnetic conductive block and the magnetic conductive block are fixed by the first clamping plate and the second clamping plate.

[0020] In some embodiments, the empty slot is a V-shaped empty slot, and the moving magnetic conductive block is a V-shaped moving magnetic conductive block.

[0021] In a second aspect, the present application provides a passive high current operation method, which is applied to the first aspect. The passive high current operation method includes:

[0022] Obtaining the current magnitude of the current carrier;

[0023] Determining whether the current meets a threshold, wherein the threshold is adjusted according to the first magnetic conductive gap and / or the second magnetic conductive gap;

[0024] When the current magnitude meets the threshold value, the action execution axis is controlled to move to the target position to output a protection action.

[0025] Compared with the prior art, one or more embodiments of the above scheme may have the following advantages or beneficial effects:

[0026] In the present application, the passive high-current action device structure is set so that no matter what the action setting value is, the return spring force on the moving magnetic block remains unchanged. When a larger action setting value is set, the spring force is too large to cause a large deflection force to cause the action setting value to drift, resulting in unreliable action setting.

[0027] By setting the first magnetic conductive gap and the second magnetic conductive gap, adjustment of different action setting values ​​is achieved, making the setting and adjustment of the action value more accurate, convenient and reliable.

[0028] Both the coarse adjustment magnetic block and the fine adjustment magnetic block can be disassembled and installed separately, making assembly more convenient and avoiding excessive waste of silicon steel sheets caused by processing the entire device. The overall processing cost is lower and more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Hereinafter, the present application will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0030] Figure 1 A schematic diagram showing the overall structure of a passive high current action device proposed in an embodiment of the present application is shown;

[0031] Figure 2 A schematic diagram of the structure of a magnetic conductive circuit of a passive high current action device proposed in one embodiment of the present application is shown;

[0032] Figure 3 A schematic diagram of the internal components of a passive high current action device proposed in an embodiment of the present application is shown;

[0033] Figure 4 A schematic diagram of a magnetic circuit and a magnetic gap structure in a passive high current action device proposed in one embodiment of the present application is shown;

[0034] Figure 5 A schematic diagram of a working air gap in a non-current flow state in a passive high-current action device proposed in an embodiment of the present application is shown;

[0035] Figure 6 A schematic diagram showing the change of the working air gap when the current reaches a threshold value in a passive high current action device proposed in one embodiment of the present application is shown;

[0036] Figure 7 A schematic flow chart of a passive high current action method proposed in an embodiment of the present application is shown.

[0037] Reference numerals:

[0038] 1. Shell; 11. Front clamping plate; 111. Coarse adjustment scale; 12. Rear clamping plate; 121. Fine adjustment scale; 13. Coarse adjustment shaft; 14. Fine adjustment shaft; 15. U-shaped groove; 16. Fixed rivet; 2. Moving magnetic block; 21. Action execution shaft; 22. Spring; 3. Static magnetic block; 4. Fixed magnetic block; 5. Coarse adjustment magnetic block; 6. Fine adjustment magnetic block; 7. Guide shaft; 8. Fine adjustment screw; 9. First magnetic gap; 10. Second magnetic gap. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the related art, the protection device of the circuit breaker is realized by adjusting the return spring of the moving magnetic block. When the protection setting value is large, the spring force will be very large, which may easily cause the moving parts to receive a large deflection force and cause great friction. Ultimately, the protection setting value will drift beyond the error range, making the protection function unreliable.

[0041] In view of the problems existing in the above-mentioned devices, the present application provides a passive large current action device and method, the device includes: a moving magnetic conductive block, a magnetic conductive block and an adjustable magnetic conductive block, wherein: the moving magnetic conductive block, the magnetic conductive block and the adjustable magnetic conductive block are connected around the protected carrier body and form a magnetic conductive circuit, the magnetic conductive block is provided with an empty slot, the moving magnetic conductive block is provided with a spring and an action execution shaft, the spring connects the moving magnetic conductive block to the empty slot, the adjustable magnetic conductive block is movably connected to the magnetic conductive block, when the current passing through the carrier body meets the threshold value, the moving magnetic conductive block moves toward the empty slot, by setting the empty slot, the spring and the moving magnetic conductive block, when forming the magnetic conductive circuit, the return spring force exerted on the moving magnetic conductive block when the compression spring enters the empty slot remains unchanged, and at the same time, when the moving magnetic conductive block moves, it drives the action execution shaft to perform the protection action.

[0042] See also Figure 1 , Figure 1 This is a schematic diagram of the overall structure of a passive high-current action device provided in an example of the present application. The passive high-current action device includes: a moving magnetic conductive block 2, a magnetic conductive block and an adjustable magnetic conductive block, wherein: the moving magnetic conductive block 2, the magnetic conductive block and the adjustable magnetic conductive block are connected around the protected carrier body and form a magnetic conductive circuit, the magnetic conductive block is provided with an empty slot, the moving magnetic conductive block 2 is provided with a spring 22 and an action execution shaft 21, and the spring 22 connects the moving magnetic conductive block 2 to the empty slot; the adjustable magnetic conductive block is movably connected to the magnetic conductive block, and when the current passing through the carrier body meets the threshold value, the moving magnetic conductive block 2 moves toward the empty slot.

[0043] It should be noted that the magnetic conductive block may be composed of multiple components. For example, the magnetic conductive block may include: a static magnetic conductive block 3 and a fixed magnetic conductive block 4, etc., which are arranged according to actual needs.

[0044] Among them, see Figure 2 The schematic diagram of the magnetic circuit structure of the passive high current action device in FIG. 1 is a schematic diagram of the magnetic circuit structure of the passive high current action device in FIG. The empty slot can refer to the V-shaped area formed between the dynamic magnetic block 2 and the static magnetic blocks 3 on both sides. In addition, the empty slot is not limited to the structure in the figure, and can include empty slots of other shapes. This application does not limit it. When the current flowing into the carrier body meets the threshold, the threshold corresponding to the carrier body can be adjusted by rotating the adjustable magnetic block to form a certain angle with the magnetic block. It should be noted that the attached Figure 1 , 2 The adjustable magnetic conductive blocks may include: a coarse adjustment magnetic conductive block 5 and a fine adjustment magnetic conductive block 66. The present application may use any one or more of them, and the present application does not limit them.

[0045] In the present embodiment, after the current is passed into the carrier fluid, a magnetic conductive circuit is formed by the moving magnetic conductive block 2, the magnetic conductive block and the adjustable magnetic conductive block components. When the current size meets the threshold value, the moving magnetic conductive block 2 arranged above the empty slot is attracted due to the magnetic conductive circuit, and the compression spring 22 moves to fit inside the empty slot, and during the movement, it drives the action execution shaft 21 arranged on the moving magnetic conductive block 2 perpendicular to the compression direction of the spring 22 to complete the effective protection action. The reaction force of the moving magnetic conductive block 2 remains unchanged. Regardless of the action setting value, the force of the return spring 22 on the moving magnetic conductive block 2 remains unchanged, so that the protection setting value is more stable and the protection function is more reliable. The various parts of the magnetic conductive circuit are independently designed, avoiding excessive waste of silicon steel sheets caused by processing the magnetic conductive frame as a whole, and the overall processing cost is lower and more environmentally friendly.

[0046] In order to prevent the dynamic magnetic block 2 from moving, the spring 22 is subjected to a large deflection force and thus generates a great friction force.

[0047] In some embodiments, the static magnetic blocks 3 are arranged on both sides of the dynamic magnetic blocks 2 to form the empty slot, and a receiving cavity is also arranged at the bottom of the empty slot, and the receiving cavity is used to store the compressed spring 22, see Figure 3 , Figure 3 A schematic diagram of the internal components of a passive high current action device provided in an embodiment of the present application. Figure 2 and Figure 3In the figure, the static magnetic blocks 3 are respectively arranged on both sides of the dynamic magnetic block 2. In some aspects, the empty slot can be set as a V-shaped empty slot, and in other aspects, the dynamic magnetic block 2 can be set as a V-shaped dynamic magnetic block 2 to ensure stable attraction on both sides of the device. After the dynamic magnetic block 2 is attracted to the static magnetic blocks 3 on both sides, the accommodating cavity set at the bottom of the empty slot will place the compressed spring 22 here to avoid displacement and excessive compression that may cause damage to the spring 22, thereby improving the reliability of the device.

[0048] In the embodiments of this application, please refer to Figure 5 and Figure 6 When no current flows through the current carrier, the distance between the V-shaped dynamic magnetic block 2 and the parallel areas on both sides of the V-shaped slot is H. When current flows through the current carrier, the working air gap will become smaller due to the electromagnetic attraction, but it is not enough to cause the action execution shaft 21 to reach an effective stroke. When the current of the current carrier reaches the action setting value, the working air gap is reduced to h, and the action execution shaft 21 can complete the effective action output.

[0049] Considering the need to adjust the threshold more flexibly to adapt to action settings corresponding to different current sizes.

[0050] In some embodiments, see Figure 4 , Figure 4 The invention is a schematic diagram of a magnetic circuit and a magnetic gap structure in a passive large current actuating device. The passive large current actuating device also includes: a shell 1, and adjustable magnetic conductive blocks include: a coarse adjustment magnetic conductive block 5 and a fine adjustment magnetic conductive block 6. The shell 1 is provided with a coarse adjustment rotating shaft 13 and a fine adjustment rotating shaft 14. The coarse adjustment magnetic conductive block 5 rotates around the coarse adjustment rotating shaft 13, and the fine adjustment magnetic conductive block 6 rotates around the fine adjustment rotating shaft 14. The coarse adjustment magnetic conductive block 5 and the fine adjustment magnetic conductive block 6 are arranged opposite to each other. The magnetic conductive blocks also include: a fixed magnetic conductive block 4, and the fixed magnetic conductive block 4 is arranged opposite to the static magnetic conductive block 3. The coarse adjustment magnetic conductive block 5 forms a first magnetic conductive gap 9 with the fixed magnetic conductive block 4 and the static magnetic conductive block 3, and the fine adjustment magnetic conductive block 6 forms a second magnetic conductive gap 10 with the fixed magnetic conductive block 4 and the static magnetic conductive block 3. The coarse adjustment magnetic conductive block 5 and the fine adjustment magnetic conductive block 6 can be separately disassembled from the front clamping plate 11 and the rear clamping plate 12 of the magnetic conductive frame base, so that the assembly is more convenient and is conducive to serialized design.

[0051] In this embodiment, the adjustment of different action setting values ​​is achieved by adjusting the first magnetic gap 9 and the second magnetic gap 10. According to the relationship between the electromagnetic attraction and the magnetic gap, Adjusting the magnetic gap will result in a larger action setting value. In the present application, the first magnetic gap 9 and the second magnetic gap 10 are both fixed after adjustment, so the action value is set more accurately and the action is more reliable.

[0052] Considering in order to further improve the stability and reliability of the device.

[0053] In some embodiments, see Figure 1 and Figure 3 The housing 1 is provided with a U-shaped groove 15. When the current passing through the carrier body meets the threshold value, the action execution shaft 21 moves up and down in the U-shaped groove 15. The moving magnetic block 2 is penetrated by a guide shaft 7. The moving magnetic block 2 and the spring 22 move up and down on the guide shaft 7. The guide shaft 7 and the action execution shaft 21 are perpendicular to each other. The guide shaft 7 and the action execution shaft 21 are fixedly connected. The action execution shaft 21 and the moving magnetic block 2 are fixedly connected relative to the circumferential direction of the guide shaft 7.

[0054] Specifically, the housing 1 includes: a first clamping plate and a second clamping plate, the first clamping plate is provided with a coarse adjustment scale 111, the coarse adjustment scale 111 is used to adjust the first magnetic conductive gap 9, the second clamping plate is provided with a fine adjustment scale 121, the fine adjustment scale 121 is used to adjust the second magnetic conductive gap 10, wherein the housing 1 is provided with a U-shaped groove 15 which can be set on the first clamping plate, and the first clamping plate is attached Figure 1 The front splint 11 is in the middle, and the second splint is in the attached Figure 1 In the middle is the rear clamp 12, the moving magnetic block 2 and the magnetic block are fixed by the front clamp 11 and the rear clamp 12, wherein the first magnetic gap 9 can be adjusted by adjusting the coarse adjustment magnetic block 5 according to the coarse adjustment scale 111 to achieve a larger range of adjustment, and the second magnetic gap 10 can be adjusted by turning the fine adjustment screw 8 according to the fine adjustment scale 121 to adjust the fine adjustment magnetic block 6 to achieve fine adjustment within a certain coarse adjustment range, the moving magnetic block 2, the static magnetic block 3, and the fixed magnetic block 4 are tightened and fixed by the front clamp 11 and the rear clamp 12, and are riveted with fixing rivets 16.

[0055] In some embodiments, except for the static magnetic conductive block 3, the dynamic magnetic conductive block 2, the fixed magnetic conductive block 4, the coarse adjustment magnetic conductive block 5 and the fine adjustment magnetic conductive block 6 which are made of magnetic conductive materials, the others are made of non-magnetic conductive materials.

[0056] See also Figure 7 , Figure 7 It is a passive high current action method, which is applied to the passive high current action device. The passive high current action method includes steps S110 to S130.

[0057] Step S110: obtaining the current magnitude of the carrier;

[0058] Step S120: determining whether the current meets a threshold value, wherein the threshold value is adjusted at least according to the first magnetic conductive gap 9 and / or the second magnetic conductive gap 10;

[0059] Step S130: When the current magnitude meets the threshold value, the action execution shaft 21 is controlled to move to the target position of the U-shaped groove 15 to output a protection action.

[0060] In the embodiments of the present application, Figure 2 , Figure 5 and Figure 6As shown, when there is no current I passing through the square frame of the device, the working air gap remains at H. When there is current I passing through, the working air gap will become smaller due to the electromagnetic attraction, but it is not enough to cause the action execution shaft 21 to reach an effective stroke. When the current I reaches the action setting value, the working air gap is reduced to h, and the action execution shaft 21 can complete the effective action output. This action can be used for circuit protection, for example, quickly disconnecting the circuit.

[0061] like Figure 1 The present invention provides a passive large current monitoring and actuating device, which is composed of a housing 1, a coarse adjustment magnetic conductive block 5 and a fine adjustment magnetic conductive block 6. The static magnetic conductive block 3, the dynamic magnetic conductive block 2, the fine adjustment magnetic conductive block 6, the fixed magnetic conductive block 4 and the coarse adjustment magnetic conductive block 5 form a quadrilateral square frame, the circuit carrier can pass through the square frame, and the magnetic lines of force induced by the current pass through all the magnetic conductive bodies to form a magnetic conductive loop. All the magnetic conductive blocks are fixed by the front clamping plate 11 and the rear clamping plate 12, or move along a set motion form.

[0062] A first magnetic gap 9 is formed between the coarse adjustment magnetic block 5 and the static magnetic block 3 and the fixed magnetic block 4 fixed on the housing 1. Different first magnetic gaps 9 can be formed by fixing the coarse adjustment magnetic block 5 at different coarse adjustment scales 111 on the front clamping plate 11, so as to adjust the action setting value in a larger range. A second magnetic gap 10 is formed between the fine adjustment magnetic block 6 and the static magnetic block 3 and the fixed magnetic block 4 fixed on the housing 1. Different second magnetic gaps 10 can be formed by screwing the fine adjustment screw 8 to align the sides of the fine adjustment magnetic block 6 with the fine adjustment scales 121 on the rear clamping plate 12, so as to adjust the action setting value in a small range.

[0063] A V-shaped space is formed between the two static magnetic blocks 3 inside the housing 1, and the dynamic magnetic block 2 can move up and down in the axial direction of the guide shaft 7. A return spring 22 is arranged below the dynamic magnetic block 2. A U-shaped groove 15 is provided on the front clamping plate 11, and the action execution shaft 21 is restricted in the U-shaped groove 15 and can only move up and down, thereby ensuring that the dynamic magnetic block 2 does not rotate in the V-shaped space.

[0064] In summary, the present application provides a passive large current action device and method, which consists of a housing 1, a coarse adjustment magnetic conductive block 5 and a fine adjustment magnetic conductive block 6. The coarse adjustment magnetic conductive block 5 and the fine adjustment magnetic conductive block 6 can rotate around the coarse adjustment shaft 13 and the fine adjustment shaft 14 respectively, and form an adjustable air gap first magnetic conductive gap 9 and second magnetic conductive gap 10 with the static magnetic conductive block 3 and the fixed magnetic conductive block 4 on the housing 1 respectively. Before the current I passing through the square frame formed by the magnetic conductive block exceeds the allowable value, the stroke of the action execution shaft 21 in the U-shaped groove 15 will not reach the effective action stroke, and the circuit will not be disconnected. When I exceeds the allowable value, the working air gap changes from H to h, and the action execution shaft 21 is effectively moved to the outside. The device designs the return spring 22 of the moving magnetic conductive block 2 to a fixed value, so that the influence of the return force of the spring 22 on the movement of the guide shaft 7 can be minimized. The present application is particularly suitable for rapid protection action for current strokes with large fault overcurrents.

[0065] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A passive high current action device, characterized in that: The passive high current action device comprises: a dynamic magnetic conductive block, a magnetic conductive block and an adjustable magnetic conductive block, wherein: The dynamic magnetic conductive block, the magnetic conductive block and the adjustable magnetic conductive block are connected around the protected current carrier and form a magnetic conductive circuit; The magnetic conductive block is provided with an empty slot, the moving magnetic conductive block is provided with a spring and an action execution shaft, and the spring connects the moving magnetic conductive block to the empty slot; The adjustable magnetic conductive block is movably connected to the magnetic conductive block, and when the magnitude of the current passing through the current carrier meets a threshold value, the movable magnetic conductive block moves toward the empty slot.

2. The passive high current action device according to claim 1, characterized in that: The magnetic conductive blocks include static magnetic conductive blocks, which are arranged on both sides of the dynamic magnetic conductive blocks to form the empty slots. A receiving cavity is also arranged at the bottom of the empty slots, and the receiving cavity is used to store the compressed spring.

3. The passive high current action device according to claim 2, characterized in that: The passive high current action device further comprises: a housing, and the adjustable magnetic conductive block comprises: a coarse adjustment magnetic conductive block and a fine adjustment magnetic conductive block; The shell is provided with a coarse adjustment shaft and a fine adjustment shaft, the coarse adjustment magnetic conductive block rotates on the coarse adjustment shaft, the fine adjustment magnetic conductive block rotates on the fine adjustment shaft, and the coarse adjustment magnetic conductive block and the fine adjustment magnetic conductive block are arranged opposite to each other.

4. The passive high current action device according to claim 3, characterized in that: The magnetic conductive block also includes: a fixed magnetic conductive block, wherein; The fixed magnetic conductive block is arranged opposite to the static magnetic conductive block, the coarse adjustment magnetic conductive block, the fixed magnetic conductive block and the static magnetic conductive block form a first magnetic conductive gap, and the fine adjustment magnetic conductive block, the fixed magnetic conductive block and the static magnetic conductive block form a second magnetic conductive gap.

5. The passive high current action device according to claim 3, characterized in that: The housing is provided with a U-shaped groove, and when the current passing through the current carrier meets a threshold value, the action execution shaft moves up and down in the U-shaped groove.

6. The passive high current action device according to claim 5, characterized in that: The moving magnetic block is provided with a guide shaft, the moving magnetic block and the spring move up and down the guide shaft, and the guide shaft is perpendicular to the action execution shaft.

7. The passive high current action device according to claim 4, characterized in that: The shell includes: a first clamping plate and a second clamping plate, the first clamping plate is provided with a coarse adjustment scale, the coarse adjustment scale is used to adjust the first magnetic conductive gap, and the second clamping plate is provided with a fine adjustment scale, the fine adjustment scale is used to adjust the second magnetic conductive gap.

8. The passive high current action device according to claim 7, characterized in that: The moving magnetic conductive block and the magnetic conductive block are fixed by the first clamping plate and the second clamping plate.

9. The passive high current action device according to claim 2, characterized in that: The empty slot is a V-shaped empty slot, and the moving magnetic conductive block is a V-shaped moving magnetic conductive block.

10. A passive high current operation method, applied to the passive high current operation device, characterized in that: The passive high current action method comprises: Obtaining the current magnitude of the current carrier; Determining whether the current meets a threshold, wherein the threshold is adjusted according to the first magnetic conductive gap and / or the second magnetic conductive gap; When the current magnitude meets the threshold value, the action execution axis is controlled to move to the target position to output a protection action.

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