Tripping device and lightning protection device

Abstract

The invention discloses a tripping device and a lightning protection device, and relates to the technical field of lightning protection, the tripping device comprises a protection device, a first terminal, a second terminal, a first tripping unit and a second tripping unit, the protection device comprises a first electrode and a second electrode; the first electrode is connected with the first terminal through a first low-temperature welding spot; the second electrode is connected with the second terminal through a second low-temperature welding spot; the first tripping unit abuts against the first low-temperature welding point. The second tripping unit abuts against the second low-temperature welding point. According to the invention, the first tripping unit and the second tripping unit are backups for each other: if one tripping unit does not act due to mechanical clamping stagnation or welding spot failure, the other tripping unit can still cut off the circuit, so that the risk of single-point failure is avoided; the temperature rise of the protection device is directly responded through the temperature-sensitive characteristic of the low-temperature welding spot, so that the accurate tripping action is ensured; and the two electrodes are separated from the terminal through the tripping device, so that the protection device is thoroughly disconnected from a circuit, and the risk of residual current is eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning protection, and in particular to a tripping device and a lightning arrester. Background Art

[0002] In the field of lightning protection for low-voltage power supply systems, varistor-type and transient voltage suppression (TVS)-type surge protective devices (SPDs) are the most widely used technical solutions. The core principle of this type of protection device is to use its nonlinear resistance characteristics to quickly conduct when encountering overvoltage or lightning strikes, discharging surge energy to the ground terminal, thereby protecting downstream equipment from damage. However, over long-term operation, varistor or TVS devices may experience performance degradation due to aging, multiple surge shocks, or extreme currents. When the internal temperature of the device rises to a critical point due to abnormal operating conditions, its low-temperature solder joints will melt, triggering the built-in spring mechanism to release mechanical energy and disconnect the device from the circuit, thereby avoiding the risk of fire caused by resistor breakdown.

[0003] Although the aforementioned tripping mechanism improves safety to a certain extent, its reliability is still limited by the stability of the mechanical structure. If the tripping device fails to operate normally due to mechanical jamming or solder joint failure, or if the contacts do not separate completely during the tripping process, generating an arc, the protective device may remain in a failed state, losing its protective capability and posing a safety hazard. To compensate for this shortcoming, traditional solutions usually add a backup fuse or dedicated protector to the front end of the lightning arrester, attempting to improve the system's fault tolerance through a secondary protection mechanism. However, this type of backup protection scheme has significant limitations: its triggering threshold depends on the current amplitude and can only respond to high-current overload conditions. It cannot effectively respond to the persistent small-current leakage caused by varistor degradation. Because small-current leakage can still cause the device to accumulate temperature rise, ultimately leading to breakdown or even fire, existing backup protection schemes have a protection blind spot when dealing with such hidden faults.

[0004] Therefore, how to design a tripping device that can improve tripping reliability without relying on external backup protection devices has become a key technical challenge in improving the safety of low-voltage power supply systems. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is how to improve the tripping reliability of a tripping device.

[0006] In order to solve the above problems, in a first aspect, an embodiment of the present invention proposes a tripping device, including a protection device, a first terminal, a second terminal, a first tripping unit and a second tripping unit, wherein the protection device includes a first electrode and a second electrode; the first electrode is connected to the first terminal through a first low-temperature solder joint; the second electrode is connected to the second terminal through the second low-temperature solder joint; the first tripping unit abuts on the first low-temperature solder joint; and the second tripping unit abuts on the second low-temperature solder joint.

[0007] A further technical solution is that the first tripping unit and the second tripping unit both include a cover plate and an elastic member, and the elastic member is connected to the cover plate;

[0008] The cover plate of the first trip unit abuts against the first low-temperature welding point, and the cover plate of the second trip unit abuts against the second low-temperature welding point.

[0009] A further technical solution is that the tripping device includes a box body, and the protection device is arranged in the box body.

[0010] A further technical solution is that the protection device is fixed to the bottom plate of the box body by insulating glue.

[0011] A further technical solution is that a pull column is provided on the box body, one end of the elastic member is connected to the pull column, and the other end of the elastic member is connected to the cover plate.

[0012] A further technical solution is that the first tripping unit and the second tripping unit each include a plurality of elastic members, and the plurality of elastic members are all connected to the cover plate.

[0013] A further technical solution is that when the first low-temperature solder joint melts, the elastic member of the first trip unit is reset, so that the cover of the first trip unit moves between the first terminal and the first electrode to separate the first terminal from the first electrode;

[0014] When the second low-temperature solder joint melts, the elastic member of the second trip unit is reset, so that the cover plate of the second trip unit moves between the second terminal and the second electrode to separate the second terminal from the second electrode.

[0015] A further technical solution is that the protection device includes two parallel-connected varistors, a connection end of the two varistors is connected to the first electrode, and the other connection end of the two varistors is connected to the second electrode.

[0016] A further technical solution is that the elastic member is a spring.

[0017] In a second aspect, an embodiment of the present invention provides a lightning arrester, which includes the tripping device as described in the first aspect.

[0018] Compared with the prior art, the embodiments of the present invention can achieve the following technical effects:

[0019] An embodiment of the present invention provides a tripping device, comprising a protective device, a first terminal, a second terminal, a first tripping unit, and a second tripping unit, wherein the protective device comprises a first electrode and a second electrode; the first electrode is connected to the first terminal via a first low-temperature solder joint; the second electrode is connected to the second terminal via a second low-temperature solder joint; the first tripping unit abuts against the first low-temperature solder joint; and the second tripping unit abuts against the second low-temperature solder joint. In the present invention, the first tripping unit and the second tripping unit serve as backups for each other: if a tripping unit fails to operate due to mechanical jamming or solder joint failure, the other tripping unit can still cut off the circuit, avoiding the risk of single-point failure; through the temperature-sensitive characteristics of the low-temperature solder joint, it directly responds to the local temperature rise of the protective device (such as aging leakage or lightning overload), ensuring accurate tripping action; both electrodes are separated from the terminal by the tripping device, completely disconnecting the protective device from the circuit, eliminating the risk of residual current.

[0020] The tripping device provided by the present invention significantly improves the safety and reliability of the surge protector through the synergistic effect of the dual tripping units and the temperature-sensitive triggering mechanism. The technical effects can be systematically deduced as follows:

[0021] 1. Redundant fault-tolerant mechanism avoids single point failure risk

[0022] Traditional tripping devices rely on a single triggering unit, which poses a risk of protection failure due to mechanical jamming or solder joint failure. This solution establishes a dual protection architecture with independent primary and secondary tripping units, providing mutual backup. If one tripping unit fails due to a low-temperature solder joint failure or mechanical structural failure, the other unit can still respond to the temperature rise signal through its abutting low-temperature solder joint and trigger a trip, forcibly severing the circuit connection. This design fundamentally eliminates the possibility of single-point failure, ensuring that system protection functions can be maintained even under extreme operating conditions.

[0023] 2. Temperature-sensitive trigger mechanism improves action accuracy

[0024] The core triggering element of the tripping device is a low-temperature solder joint, which is characterized by directly sensing the local temperature rise of the protection device (such as continuous heating caused by aging leakage or instantaneous high temperature caused by lightning overload). Compared with traditional protection schemes that rely on current amplitude, the temperature-sensitive mechanism can more accurately capture abnormal conditions of the protection device - even the temperature rise caused by the long-term accumulation of tiny leakage currents can trigger the solder joint to melt. This direct temperature-based response mode avoids the threshold delay or misjudgment problems of current-type protectors, ensuring that the tripping action strictly matches the actual failure risk of the device.

[0025] 3. Full circuit physical isolation eliminates residual risks

[0026] The tripping device is connected to the two terminals via a first electrode and a second electrode, respectively, and when triggered, it simultaneously cuts off the dual-path electrical connection. Specifically, when the low-temperature solder joint melts, the tripping unit drives the cover to move, physically isolating the contact surface between the electrode and the terminal while increasing the air gap distance. This design not only completely blocks the current path, but also suppresses the arc that may be generated when the contacts separate by physically blocking it, avoiding the risk of residual current or arc reignition caused by incomplete single-path disconnection in traditional solutions, and achieving safe decoupling of the protection device and the circuit.

[0027] 4. Comprehensive technical advantages and application value

[0028] The synergistic effect of these technical effects enables this trip device to achieve comprehensive protection against low-current leakage, high-current overload, and mechanical failure without relying on external backup protectors. Its redundant design, temperature-sensitive triggering, and full-circuit disconnection mechanism provide a higher level of active safety protection for low-voltage power supply systems. It is particularly suitable for space-constrained applications with stringent reliability requirements, demonstrating significant engineering value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0032] Figure 1 This is a front schematic diagram of a tripping device proposed in Example 1 of the present invention;

[0033] Figure 2 This is a schematic diagram of the back of a tripping device proposed in Example 1 of the present invention;

[0034] Figure 3 This is a front schematic diagram of a tripping device proposed in Example 2 of the present invention;

[0035] Figure 4 This is a side schematic diagram of a tripping device proposed in Example 2 of the present invention;

[0036] Figure 5 This is a principle block diagram of a tripping device proposed in an embodiment of the present invention, wherein t 0 is the tripping temperature of the first tripping unit and the second tripping unit.

[0037] Reference numerals

[0038] Protection device 10, first terminal 20, second terminal 30, first trip unit 40, second trip unit 50, cover plate 60, elastic member 70, box body 80, pull column 90, bottom plate 81, first low-temperature solder joint 11, first electrode 12, second low-temperature solder joint 13, second electrode 14, first contact 21, second contact 31. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Similar component numbers in the drawings represent similar components. Obviously, the embodiments described below are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0041] It should also be understood that the terms used in this description of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0042] Example 1

[0043] See also Figure 1-Figure 2 , and combined with Figure 5 The embodiment of the present invention provides a tripping device that can achieve reliable tripping of a lightning protection device. To achieve the above technical objectives, the tripping device includes a protection device 10, a first terminal 20, a second terminal 30, a first tripping unit 40, and a second tripping unit 50. The specific structure is described as follows:

[0044] The protection device 10 includes a first electrode 12 and a second electrode 14. The first electrode 12 and the second electrode 14 respectively serve as an input side and an output side of the protection device 10. The protection device 10 may be a varistor.

[0045] The first electrode 12 is connected to the first terminal 20 via a first low-temperature solder joint 11; the second electrode 14 is connected to the second terminal 30 via a second low-temperature solder joint 13. A low-temperature solder joint is a solder connection formed using a low-melting-point solder. Its core characteristic is that it melts at a relatively low temperature (typically 100°C-200°C, for example, 150°C). Specifically, the first contact 21 of the first terminal 20 is welded to the first electrode 12 via the first low-temperature solder joint 11; the second contact 31 of the second terminal 30 is welded to the second electrode 14 via the second low-temperature solder joint 13.

[0046] The first trip unit 40 abuts the first low-temperature solder joint 11, and the second trip unit 50 abuts the second low-temperature solder joint 13. Specifically, as the temperatures of the first and second low-temperature solder joints 11, 13 increase, the solder joints soften. When the bonding force of the first low-temperature solder joint 11 is less than the abutting force of the first trip unit 40, the first low-temperature solder joint 11 breaks, achieving tripping. When the bonding force of the second low-temperature solder joint 13 is less than the abutting force of the second trip unit 50, the second low-temperature solder joint 13 breaks, achieving tripping.

[0047] An embodiment of the present invention provides a tripping device comprising a protective device 10, a first terminal 20, a second terminal 30, a first tripping unit 40, and a second tripping unit 50. The protective device 10 includes a first electrode 12 and a second electrode 14. The first electrode 12 is connected to the first terminal 20 via a first low-temperature solder joint 11. The second electrode 14 is connected to the second terminal 30 via a second low-temperature solder joint 13. The first tripping unit 40 abuts against the first low-temperature solder joint 11, and the second tripping unit 50 abuts against the second low-temperature solder joint 13. In the present invention, the first tripping unit 40 and the second tripping unit 50 serve as backup for each other: if one tripping unit fails to operate due to mechanical jamming or solder joint failure, the other tripping unit can still disconnect the circuit, avoiding the risk of single-point failure. The temperature-sensitive nature of the low-temperature solder joint directly responds to local temperature rises in the protective device 10 (such as aging leakage or lightning overload), ensuring precise tripping. Both electrodes are separated from the terminals by the tripping device, completely disconnecting the protective device 10 from the circuit and eliminating the risk of residual current.

[0048] In some preferred embodiments, such as the present embodiment, the first trip unit 40 and the second trip unit 50 both include a cover plate 60 and an elastic member 70, and the elastic member 70 is connected to the cover plate 60; wherein the cover plate 60 of the first trip unit 40 abuts against the first low-temperature solder joint 11, and the cover plate 60 of the second trip unit 50 abuts against the second low-temperature solder joint 13.

[0049] Specifically, the cover plate 60 is made of an insulating material with insulating properties. The elastic member 70 (such as a spring) stores mechanical energy in advance through compression or extension. When the low-temperature solder joint melts, the energy is quickly released to drive the cover plate 60 to move, ensuring the instantaneous tripping action.

[0050] In some preferred embodiments, such as the present embodiment, the tripping device includes a box body 80 , and the protection device 10 is disposed in the box body 80 .

[0051] Specifically, the housing 80 provides a protective space for the protection device 10 and the trip unit, preventing external environmental factors (such as dust and moisture) from interfering with the internal mechanisms. The housing 80 skeleton supports the relative position of the trip unit and the protection device 10, ensuring a precise movement trajectory and avoiding mechanical deviation.

[0052] Furthermore, the protection device 10 is fixed on the bottom plate 81 of the box body 80 by means of insulating glue.

[0053] Specifically, the insulating glue tightly fits the protection device 10 to the bottom plate 81 of the box body 80, accelerates heat conduction to the box body 80, slows down the temperature rise rate of the low-temperature solder joints, and reduces the probability of false triggering.

[0054] At the same time, the insulating glue fixes the protective device 10 to prevent the trip unit from being misplaced or having poor contact due to mechanical vibration.

[0055] Furthermore, a pull post 90 is provided on the box body 80 , one end of the elastic member 70 is connected to the pull post 90 , and the other end of the elastic member 70 is connected to the cover plate 60 .

[0056] Specifically, the pull post 90 serves as a fixed fulcrum for the elastic member 70, constraining the movement of the cover plate 60 and ensuring precise contact separation in a predetermined direction (e.g., horizontal or vertical). The elastic member 70's tension or compression path is limited, minimizing energy loss and improving tripping efficiency.

[0057] Furthermore, the first trip unit 40 and the second trip unit 50 each include a plurality of elastic members 70 , and the plurality of elastic members 70 are connected to the cover plate 60 .

[0058] Specifically, multiple elastic members 70 provide a balanced driving force to prevent failure of a single elastic member 70 from causing the cover 60 to become stuck. The multiple elastic members 70 work together to reduce vibration or deviation of the cover 60 during movement, ensuring complete contact separation.

[0059] In some preferred embodiments, such as the present embodiment, when the first low-temperature solder joint 11 is melted, the elastic member 70 of the first trip unit 40 is reset, so that the cover plate 60 of the first trip unit 40 moves between the first terminal 20 and the first electrode 12 to separate the first terminal 20 from the first electrode 12;

[0060] When the second low-temperature solder joint 13 melts, the elastic member 70 of the second trip unit 50 is reset, so that the cover plate 60 of the second trip unit 50 moves between the second terminal 30 and the second electrode 14 to separate the second terminal 30 from the second electrode 14 .

[0061] Specifically, when the low-temperature solder joint melts, the elastic member 70 resets, driving the cover plate 60 to move, separating the terminal from the electrode. Once inserted into the gap between the contacts (terminal and electrode), the cover plate 60 physically blocks the ionization path, preventing the arc from reigniting. The instantaneous action of the elastic member 70 ensures that the circuit is disconnected within milliseconds, preventing secondary failures caused by continued leakage.

[0062] Furthermore, the edges of the electrodes (the first electrode 12 and the second electrode 14 ) may be tilted upwards to facilitate insertion of the cover plate 60 between the electrodes and the terminals.

[0063] In some preferred embodiments, such as this embodiment, the elastic member 70 is a spring.

[0064] Specifically, springs, as mature elastic elements, offer stable mechanical properties and a long lifespan, making them suitable for frequent tripping operations. The springs' high compression / tension energy storage density ensures sufficient and rapid release of the mechanical energy required for tripping.

[0065] Example 2

[0066] See also Figure 3-Figure 4 , and combined with Figure 5 , an embodiment of the present invention provides a tripping device, which differs from the tripping device provided in Example 1 in that:

[0067] In the first embodiment, the first trip unit 40 and the second trip unit 50 are disposed at the front and rear sides of the box body 80 .

[0068] In embodiment 2, the first trip unit 40 is disposed on the front side of the box body 80 , and the second trip unit 50 is disposed on the right side of the box body 80 .

[0069] In Example 2, the protection device 10 includes two parallel-connected varistors, one connection end of the two varistors is connected to the first electrode 12 , and the other connection end of the two varistors is connected to the second electrode 14 .

[0070] Specifically, protective device 10 consists of two varistors connected in parallel, with their two connecting terminals connected to two electrodes. This parallel design divides the surge current, significantly improving the arrester's overall energy absorption capacity. If one varistor fails, the other can still operate independently, extending the effective life of protective device 10.

[0071] Specifically, the protection device 10 is a two-chip protection device formed by connecting two MOVs in parallel. In this case, one of the electrodes is located on the side of the protection device 10. Therefore, the second trip unit 50 is designed to be located on the side of the housing 80, and the first trip unit 40 is located on the front or back of the housing 80. In Example 2, the first trip unit 40 is located on the front of the housing 80, and the second trip unit 50 is located on the right side of the housing 80. The operating principle of Example 2 is exactly the same as that of Example 1, and will not be repeated here.

[0072] The tripping device provided by the present invention significantly improves the safety and reliability of the surge protector through the synergistic effect of the dual tripping units and the temperature-sensitive triggering mechanism. The technical effects can be systematically deduced as follows:

[0073] 1. Redundant fault-tolerant mechanism avoids single point failure risk

[0074] Traditional tripping devices rely on a single triggering unit, which poses a risk of protection failure due to mechanical jamming or solder joint failure. This solution establishes a dual protection architecture with independent primary and secondary tripping units, providing mutual backup. If one tripping unit fails due to a low-temperature solder joint failure or mechanical structural failure, the other unit can still respond to the temperature rise signal through its abutting low-temperature solder joint and trigger a trip, forcibly severing the circuit connection. This design fundamentally eliminates the possibility of single-point failure, ensuring that system protection functions can be maintained even under extreme operating conditions.

[0075] 2. Temperature-sensitive trigger mechanism improves action accuracy

[0076] The core triggering element of the tripping device is a low-temperature solder joint, which is characterized by directly sensing the local temperature rise of the protection device (such as continuous heating caused by aging leakage or instantaneous high temperature caused by lightning overload). Compared with traditional protection schemes that rely on current amplitude, the temperature-sensitive mechanism can more accurately capture abnormal conditions of the protection device - even the temperature rise caused by the long-term accumulation of tiny leakage currents can trigger the solder joint to melt. This direct temperature-based response mode avoids the threshold delay or misjudgment problems of current-type protectors, ensuring that the tripping action strictly matches the actual failure risk of the device.

[0077] 3. Full circuit physical isolation eliminates residual risks

[0078] The tripping device is connected to the two terminals via a first electrode and a second electrode, respectively, and when triggered, it simultaneously cuts off the dual-path electrical connection. Specifically, when the low-temperature solder joint melts, the tripping unit drives the cover to move, physically isolating the contact surface between the electrode and the terminal while increasing the air gap distance. This design not only completely blocks the current path, but also suppresses the arc that may be generated when the contacts separate by physically blocking it, avoiding the risk of residual current or arc reignition caused by incomplete single-path disconnection in traditional solutions, and achieving safe decoupling of the protection device and the circuit.

[0079] 4. Comprehensive technical advantages and application value

[0080] The synergistic effect of these technical effects enables this trip device to achieve comprehensive protection against low-current leakage, high-current overload, and mechanical failure without relying on external backup protectors. Its redundant design, temperature-sensitive triggering, and full-circuit disconnection mechanism provide a higher level of active safety protection for low-voltage power supply systems. It is particularly suitable for space-constrained applications with stringent reliability requirements, demonstrating significant engineering value.

[0081] An embodiment of the present invention provides a lightning arrester, which includes the tripping device as described in any one of the above embodiments.

[0082] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0083] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 should not be understood as limiting the present invention.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0085] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0086] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0087] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0088] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

[0089] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A tripping device, characterized in that: The present invention comprises a protection device, a first terminal, a second terminal, a first tripping unit and a second tripping unit, wherein the protection device comprises a first electrode and a second electrode; the first electrode is connected to the first terminal via a first low-temperature solder joint; the second electrode is connected to the second terminal via a second low-temperature solder joint; the first tripping unit abuts against the first low-temperature solder joint; and the second tripping unit abuts against the second low-temperature solder joint.

2. The tripping device according to claim 1, characterized in that: The first trip unit and the second trip unit each include a cover plate and an elastic member, wherein the elastic member is connected to the cover plate; The cover plate of the first trip unit abuts against the first low-temperature welding point, and the cover plate of the second trip unit abuts against the second low-temperature welding point.

3. The tripping device according to claim 2, characterized in that: The tripping device comprises a box body, and the protection device is arranged in the box body.

4. The tripping device according to claim 3, characterized in that: The protection device is fixed on the bottom plate of the box body by means of insulating glue.

5. The tripping device according to claim 3, characterized in that: A pull column is provided on the box body, one end of the elastic member is connected to the pull column, and the other end of the elastic member is connected to the cover plate.

6. The tripping device according to claim 2, characterized in that: The first tripping unit and the second tripping unit each include a plurality of elastic members, and the plurality of elastic members are all connected to the cover plate.

7. The tripping device according to claim 2, characterized in that: When the first low-temperature solder joint is melted, the elastic member of the first trip unit is reset, so that the cover plate of the first trip unit moves between the first terminal and the first electrode to separate the first terminal from the first electrode; When the second low-temperature solder joint melts, the elastic member of the second trip unit is reset, so that the cover plate of the second trip unit moves between the second terminal and the second electrode to separate the second terminal from the second electrode.

8. The tripping device according to claim 1, characterized in that: The protection device includes two parallel-connected varistors, one connection end of the two varistors is connected to the first electrode, and the other connection end of the two varistors is connected to the second electrode.

9. The tripping device according to claim 2, characterized in that: The elastic member is a spring.

10. A lightning arrester, characterized in that: The device comprises a tripping device as described in any one of claims 1 to 9.

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