Auxiliary grounding tool and low-voltage grounding device

Abstract

The invention relates to an auxiliary grounding tool and a low-voltage grounding device. The mounting seat is provided with a clamping cavity, and the mounting seat is provided with a clamping part used for defining the clamping cavity; the clamp assembly is movably arranged on the mounting base and connected with the applying assembly, the clamp assembly and the clamping part are matched to define a clamping cavity, and the applying assembly can drive the clamp assembly to move close to or away from the clamping part; and the switching copper bar is arranged outside the mounting seat, and the switching copper bar is provided with a copper bar extension part which is arranged to be vertical to the grounding copper bar. The copper bar extension part forms a stable and reliable connection interface with an ideal direction (transversely perpendicular to the ground), so that the grounding wire clamp of the low-voltage grounding device can be effectively clamped and installed with the copper bar extension part, and large-area and low-resistance fastening connection is obtained between the grounding wire clamp and the copper bar extension part. Therefore, obvious increase of contact resistance caused by poor contact state of point contact or line contact is avoided.

Description

Technical Field

[0001] This application relates to the technical field of power operation and maintenance equipment, and in particular to an auxiliary grounding device and a low-voltage grounding device. Background Technology

[0002] In the daily operation and maintenance of low-voltage distribution networks, to ensure personnel safety and prevent electric shock accidents, portable short-circuit grounding wires must be used to connect the grounding copper busbars of the low-voltage distribution network for reliable grounding. Currently, the structure and engagement direction of the clamp heads of commonly used short-circuit grounding wires are usually fixed. However, in specific distribution facilities such as American-style transformer substations, the installation direction of the grounding copper busbars varies, often resulting in situations where they are not horizontally perpendicular to the ground. Furthermore, the surrounding space of the grounding copper busbar is extremely narrow, greatly restricting grounding operations. This makes it difficult to adjust the clamps of traditional grounding wires to the ideal angle, preventing the formation of a large-area, high-pressure surface contact with the grounding copper busbar, often resulting in only point or line contact.

[0003] Poor contact conditions at points or lines can lead to a significant increase in contact resistance. When an accidental short circuit occurs in the line, a huge fault current will flow through this contact point. According to Joule's law Q=I²Rt, a local high temperature will be generated at this point, which may cause the following serious consequences: melting the grounding clamp or the grounding copper busbar of the equipment, resulting in instantaneous failure of the grounding connection; generating an electric arc that causes secondary damage to surrounding equipment and personnel; and greatly reducing the grounding protection function, making it impossible to quickly guide the fault current to the ground, seriously threatening the life safety of front-line maintenance personnel. Summary of the Invention

[0004] Therefore, it is necessary to provide an auxiliary grounding tool and a low-voltage grounding device to address the problem that traditional grounding technology cannot form an effective contact, resulting in grounding failure and potential safety hazards such as damage to personnel and equipment.

[0005] A first aspect of this application provides an auxiliary grounding device, comprising:

[0006] Actuating components;

[0007] The mounting base has a clamping cavity and a clamping portion for forming the clamping cavity;

[0008] A clamping assembly, movably disposed on the mounting base and connected to the actuating assembly, the clamping assembly cooperating with the clamping portion to form the clamping cavity, the actuating assembly capable of driving the clamping assembly to move closer to or away from the clamping portion; and

[0009] A transition copper busbar is disposed outside the mounting base, and the transition copper busbar has a copper busbar extension for being disposed perpendicular to the grounding copper busbar.

[0010] The auxiliary grounding device in this solution serves as an intermediate medium to achieve the grounding connection between the low-voltage grounding device and the grounding copper busbar of the low-voltage distribution network. Specifically, during installation, the grounding copper busbar is aligned and inserted into the clamping cavity of the mounting base. Then, the actuating component is operated, which drives the clamping assembly to move closer to the clamping part, thereby achieving the clamping assembly and clamping part working together to clamp and fix the grounding copper busbar. This ensures reliable assembly of the auxiliary grounding device and the grounding copper busbar. Because the mounting base has an external adapter copper busbar with an extension perpendicular to the grounding copper busbar, the extension forms a stable, reliable, and ideally oriented section (horizontally perpendicular to the grounding copper busbar). The connection interface (surface) allows the grounding clamp of the low-voltage grounding device to be effectively clamped and installed with the copper plate extension. This results in a large-area, low-resistance, secure connection between the grounding clamp and the copper plate extension, avoiding the significant increase in contact resistance caused by poor point or line contact. In the event of an accidental short circuit, a large fault current will flow through this contact point, generating localized high temperatures that could melt the grounding clamp or grounding copper busbar, causing instantaneous failure of the grounding connection. This prevents the generation of electric arcs that could cause secondary damage to surrounding equipment and personnel, ensures effective grounding protection, and quickly guides the fault current to the ground, guaranteeing the safety of frontline maintenance personnel.

[0011] The technical solution of this application will be further described below:

[0012] In one embodiment, the clamping assembly includes an active slider and a clamping slider, the active slider and the clamping slider being stacked on the mounting base, with the active slider located on the side of the clamping slider away from the clamping portion, and the clamping slider and the clamping portion being spaced apart to form the clamping cavity, the clamping cavity being used for a grounding copper busbar to extend into.

[0013] The actuation component is connected to the active slider so that by driving the active slider to slide, the clamping slider moves closer to or away from the clamping part, thereby clamping or releasing the grounding copper busbar.

[0014] In one embodiment, the active slider has a first inclined surface on the side facing the clamping slider, and the clamping slider has a second inclined surface on the side facing the active slider, wherein the first inclined surface and the second inclined surface are adapted to fit together;

[0015] The first inclined surface is provided with a first locking protrusion and a first locking groove, and the second inclined surface is provided with a second locking protrusion and a second locking groove. The first locking protrusion is slidably locked in the second locking groove, and the second locking protrusion is slidably locked in the first locking groove.

[0016] In one embodiment, the mounting base includes a first mounting portion having a threaded through hole, the active slider having a threaded hole aligned with the threaded through hole, and the actuation component including a screw, an insulating rod, and an operating handle. The operating handle is connected to one end of the insulating rod, the screw is detachably connected to the other end of the insulating rod, and the screw is threaded through the threaded through hole and threaded into the threaded hole.

[0017] In one embodiment, the auxiliary grounding device further includes a first mounting member and a second mounting member, and the mounting base further includes a second mounting part connected to the first mounting part and spaced apart from the clamping part. The second mounting part has a guide hole, one end of the first mounting member is connected to the active slider, and the other end of the first mounting member is slidably disposed in the guide hole.

[0018] The adapter copper busbar also includes a copper busbar mounting part connected to the copper busbar extension, and the copper busbar mounting part is fixed to the outer side of the clamping part by the second mounting member.

[0019] In one embodiment, the mounting base further includes a constraint portion connected to the second mounting portion and spaced apart from the first mounting portion, the constraint portion being spaced apart from the clamping portion to form an inlet and outlet, the inlet and outlet communicating with the clamping cavity;

[0020] The constraint part slides into contact with the clamping slider.

[0021] In one embodiment, the auxiliary grounding device further includes a controller and a current sensor, the current sensor being mounted on the copper busbar extension and electrically connected to the controller.

[0022] In one embodiment, the auxiliary grounding device further includes a temperature sensor, which is attached to the clamping portion and / or the copper busbar extension portion by thermally conductive silicone grease, and the temperature sensor is electrically connected to the controller.

[0023] In one embodiment, the auxiliary grounding device further includes a warning status indicator light, which is mounted on the mounting base and electrically connected to the controller. The warning status indicator light has at least three display colors: red, yellow, and street light.

[0024] A second aspect of this application also proposes a low-voltage grounding device, comprising:

[0025] Grounding wire; and

[0026] As described in any of the above embodiments, the grounding clamp of the grounding wire is detachably connected to the copper busbar extension of the auxiliary grounding device. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an isometric structural diagram of an auxiliary grounding device according to one embodiment.

[0030] Figure 2 for Figure 1 A front view schematic diagram of the auxiliary grounding device.

[0031] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0032] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0033] Figure 5 This is a schematic diagram of the mounting base according to one embodiment.

[0034] Figure 6 This is a schematic diagram of the structure of an active slider according to one embodiment.

[0035] Figure 7 This is a schematic diagram of the structure of a clamping slider according to one embodiment.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Auxiliary grounding device; 10. Actuating component; 11. Screw; 12. Insulating rod; 13. Operating handle; 20. Mounting base; 21. Clamping cavity; 22. Clamping part; 23. First mounting part; 231. Threaded through hole; 24. Second mounting part; 241. Guide hole; 25. Constraint part; 26. Inlet and outlet; 30. Clamping assembly; 31. Active slider; 311. First inclined surface; 311a. First latching protrusion; 311b. First latching groove; 32. Clamping slider; 321. Second inclined surface; 321a. Second latching protrusion; 321b. Second latching groove; 40. Adapter copper busbar; 41. Copper busbar mounting part; 42. Copper busbar extension part; 50. First mounting component; 60. Second mounting component. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0044] See Figures 1 to 4 This is a schematic diagram of the structure of an auxiliary grounding device 100 according to an embodiment of this application, which includes an actuation component 10, a mounting base 20, a clamping component 30, and a transition copper busbar 40.

[0045] The mounting base 20 is provided with a clamping cavity 21, and the mounting base 20 has a clamping part 22 for forming the clamping cavity 21. In use, the mounting base 20 is connected to the grounding copper busbar through the clamping cavity 21 to achieve installation and fixation with the grounding copper busbar.

[0046] Optionally, the mounting base 20 is made of metal to ensure reliable conductivity. More specifically, both the mounting base 20 and the adapter copper busbar 40 are made of copper, ensuring excellent conductivity and mechanical strength while avoiding electrochemical corrosion caused by material differences.

[0047] The clamp assembly 30 is movably disposed on the mounting base 20 and connected to the actuating assembly 10. The clamp assembly 30 and the clamping part 22 cooperate to form a clamping cavity 21. The actuating assembly 10 can drive the clamp assembly 30 to move closer to or further away from the clamping part 22. The adapter copper bus 40 is disposed outside the mounting base 20 and has a copper bus extension 42 for being disposed perpendicular to the grounding copper bus.

[0048] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: The auxiliary grounding device 100 of this solution serves as an intermediate medium to realize the grounding connection between the low-voltage grounding device and the grounding copper busbar of the low-voltage distribution network; specifically, during installation, the grounding copper busbar is aligned and inserted into the clamping cavity 21 of the mounting base 20, and then the actuating component 10 is operated. The actuating component 10 can drive the clamping component 30 to move closer to the clamping part 22, thereby realizing that the clamping component 30 and the clamping part 22 cooperate to clamp and fix the grounding copper busbar, thereby realizing the reliable assembly of the auxiliary grounding device 100 and the grounding copper busbar. Since the mounting base 20 is provided with a transition copper busbar 40, and the transition copper busbar 40 has a copper busbar extension 4 perpendicular to the grounding copper busbar, 2. The copper busbar extension 42 forms a stable, reliable, and ideally oriented (horizontally perpendicular to the ground) connection interface. Therefore, the grounding clamp of the low-voltage grounding device can be effectively clamped and installed with the copper busbar extension. A large-area, low-resistance tight connection is obtained between the grounding clamp and the copper busbar extension, thereby avoiding the significant increase in contact resistance caused by poor contact conditions such as point contact or line contact. When an accidental short circuit occurs in the line, a huge fault current will flow through this contact point and generate local high temperature, causing the grounding clamp or grounding copper busbar to melt, resulting in instantaneous failure of the grounding connection. This prevents the generation of electric arcs that could cause secondary damage to surrounding equipment and personnel. It ensures the effectiveness of the grounding protection function, can quickly guide the fault current to the ground, and ensures the safety of front-line maintenance personnel.

[0049] Please continue reading. Figure 1 and Figure 4 Based on the above embodiments, in one embodiment, the clamping assembly 30 includes an active slider 31 and a clamping slider 32. The active slider 31 and the clamping slider 32 are stacked on the mounting base 20, and the active slider 31 is located on the side of the clamping slider 32 away from the clamping part 22. The clamping slider 32 and the clamping part 22 are arranged at intervals to form a clamping cavity 21, which is used for the grounding copper busbar to extend into.

[0050] The actuating component 10 is connected to the active slider 31 so that by driving the active slider 31 to slide, the clamping slider 32 moves closer to or away from the clamping part 22, thereby clamping or releasing the grounding copper busbar.

[0051] In non-installation and use state, the actuating component 10 drives the active slider 31 away from the clamping part 22, thereby avoiding applying pushing force towards the clamping part 22 to the clamping slider 32. The clamping cavity 21 obtains maximum space and has the ability to accommodate grounding copper busbars of different thicknesses. In use, after the grounding copper busbar is inserted into the clamping cavity 21, the actuating component 10 is operated. The actuating component 10 drives the active slider 31 to move towards the clamping part 22, so that the active slider 31 can push the clamping slider 32 closer to the clamping part 22. Finally, the clamping slider 32 and the clamping part 22 clamp the grounding copper busbar simultaneously from opposite sides, realizing the clamping and fixing of the auxiliary base tool and the grounding copper busbar.

[0052] Please continue reading. Figure 4 , Figure 6 and Figure 7 Furthermore, based on the above embodiments, the active slider 31 has a first inclined surface 311 on the side facing the clamping slider 32, and the clamping slider 32 has a second inclined surface 321 on the side facing the active slider 31. The first inclined surface 311 and the second inclined surface 321 are adapted to fit together.

[0053] The first inclined surface 311 is provided with a first locking protrusion 311a and a first locking groove 311b, and the second inclined surface 321 is provided with a second locking protrusion 321a and a second locking groove 321b. The first locking protrusion 311a is slidably locked in the second locking groove 321b, and the second locking protrusion 321a is slidably locked in the first locking groove 311b.

[0054] By using an active slider 31 and a clamping slider 32 fitted together with a first inclined surface 311 and a second inclined surface 321, the actuating component 10 applies a driving force to the active slider 31 along its axial direction. When the active slider 31 slides relative to the clamping slider 32 in a direction perpendicular to their stacking, the transmission characteristics of the first inclined surface 311 and the second inclined surface 321 enable the active slider 31 to push the clamping slider 32 toward the clamping part 22. The driving method and principle are simple, the required movement space is small, and it is conducive to the miniaturization design of the auxiliary grounding device 100.

[0055] Furthermore, by means of the sliding engagement of the first latching protrusion 311a and the second latching groove 321b, as well as the second latching protrusion 321a and the first latching groove 311b, the assembly strength and stability of the active slider 31 and the clamping slider 32 can be significantly improved. On the other hand, it guides and limits the relative sliding of the active slider 31 and the clamping slider 32, improving the stability of the movement of the clamping slider 32 towards or away from the clamping part 22. Moreover, when the active slider 31 is reset, it can also pull the clamping slider 32 away from the clamping part 22 at the same time, thereby releasing the grounding copper busbar and facilitating the quick and effective disassembly of the auxiliary grounding device 100 and the grounding copper busbar.

[0056] Please continue reading. Figure 1 , Figure 4 and Figure 5 Furthermore, based on any of the above embodiments, the mounting base 20 includes a first mounting portion 23, which has a threaded through hole 231. For example, the first mounting portion 23 is the base plate of the mounting base 20, and the base plate is used for direct assembly and connection with the actuation component 10.

[0057] The active slider 31 has a threaded hole that aligns with the threaded through hole 231. The actuation assembly 10 includes a screw 11, an insulating rod 12, and an operating handle 13. The operating handle 13 is connected to one end of the insulating rod 12, and the screw 11 is detachably connected to the other end of the insulating rod 12. The screw 11 is screwed through the threaded through hole 231 and screwed into the threaded hole.

[0058] By rotating the operating handle 13 clockwise, the operating arm drives the insulating rod 12 and the screw 11 to rotate clockwise synchronously, causing the screw 11 to move linearly along its axis toward the mounting base 20. This allows the screw 11 to push the active slider 31 to move, and the active slider 31 to push the clamping slider 32 to clamp the grounding copper busbar. Conversely, when the operating handle 13 is rotated counterclockwise, the screw 11 moves linearly along its axis away from the mounting base 20. This allows the screw 11 to pull the active slider 31 to reset, and the active slider 31 to simultaneously pull the clamping slider 32 away from the clamping part 22, thus releasing the grounding copper busbar.

[0059] Furthermore, by utilizing the self-locking characteristics of the threaded pair between the screw 11 and the threaded through hole 231, the clamping slider 32 is provided with excellent and reliable positioning support, ensuring that the clamping slider 32 will not give way due to the reverse force of the grounding copper busbar after clamping the grounding copper busbar, thus preventing insufficient clamping force and affecting the installation stability of the auxiliary grounding device 100.

[0060] Please continue reading. Figures 1 to 5 Furthermore, in another embodiment, the auxiliary grounding device 100 further includes a first mounting member 50 and a second mounting member 60. The mounting base 20 also includes a second mounting part 24 connected to the first mounting part 23 and disposed opposite to the clamping part 22 at a distance. The second mounting part 24 has a guide hole 241. One end of the first mounting member 50 is connected to the active slider 31, and the other end of the first mounting member 50 is slidably disposed in the guide hole 241.

[0061] The adapter copper busbar 40 also includes a copper busbar mounting part 41 connected to the copper busbar extension 42. The copper busbar mounting part 41 is fixed to the outer side of the clamping part 22 by the second mounting member 60.

[0062] With this configuration, the active slider 31 can be slidably mounted on the guide hole 241 via the first mounting member 50, so as to provide guidance and limit for the reciprocating sliding of the active slider 31 through the hole wall of the guide hole 241. It is easy to understand that the guide hole 241 is an elongated slot, the length of which is sufficient to allow the active slider 31 to effectively push or pull the clamping slider 32 to clamp or release the grounding copper busbar.

[0063] The copper busbar mounting part 41 can be assembled and connected to the clamping part 22 via the second mounting part 60, so as to realize the assembly and fixation of the entire copper busbar 40 and the mounting base 20.

[0064] Optionally, the first mounting component 50 and the second mounting component 60 can be any one of the following, including but not limited to threaded components, clamps, etc., and can be flexibly selected according to actual needs.

[0065] Please continue reading. Figure 1 , Figure 4 and Figure 5 Furthermore, based on the above embodiments, the mounting base 20 also includes a constraint portion 25 connected to the second mounting portion 24 and spaced apart from the first mounting portion 23. The constraint portion 25 and the clamping portion 22 are spaced apart to form an inlet and outlet 26, which communicates with the clamping cavity 21.

[0066] The constraint part 25 and the clamping slider 32 make sliding contact with each other.

[0067] The inlet / outlet 26 facilitates the insertion or removal of the grounding copper busbar from the clamping cavity 21. It should be noted that the opening width of the inlet / outlet 26 should be compatible with various thicknesses of grounding copper busbars commonly available on the market to meet the universality requirements of the auxiliary grounding device 100.

[0068] The constraint part 25 is in contact with one side of the base of the clamping slider 32, and the first mounting part 23 is in contact with the other side of the clamping slider 32, which can form a guide rail and play a role in the installation, positioning and movement guidance of the clamping slider 32.

[0069] It should be noted that existing grounding equipment lacks the means to monitor the connection status in real time during grounding operations. After completing the grounding operation, workers cannot know whether there are potential hazards such as increased resistance due to loosening or abnormal heating due to leakage current at the connection point. The entire grounding system is in an uncertain state of "blind connection." Therefore, it is crucial to achieve reliable physical connection while simultaneously sensing and evaluating the electrical status of the grounding loop (such as contact resistance, temperature, and whether fault current is flowing) in real time, and providing local and remote alarms when abnormal conditions occur. This would transform "passive connection" into "active monitoring and intelligent early warning," thereby comprehensively improving the safety level and intelligent management of grounding operations.

[0070] Based on this, in one embodiment of this application, the auxiliary grounding device 100 further includes a controller and a current sensor. The current sensor is mounted on the copper busbar extension 42 and is electrically connected to the controller. For example, the current sensor is a Rogowski coil sensor. During operation, the coil is wound around the outside of the copper busbar extension 42. According to Faraday's law of electromagnetic induction and Ampere's circuital law, when current flows through the conductor, a changing magnetic field is generated, inducing a voltage signal Vout(t) = Mdi / dt at both ends of the coil, which is proportional to the rate of change of current di / dt; where M is the mutual inductance coefficient of the coil.

[0071] The voltage signal passes through an integrator circuit, which restores it to a voltage signal proportional to the original current. Then, the signal is amplified and filtered by a signal conditioning circuit before being sampled by the ADC (digital-to-analog converter) pin of the controller (e.g., a microcontroller, MCU). In other words, by monitoring the changes in the current flowing through the auxiliary grounding device 100, intelligent monitoring of the connection status can be achieved.

[0072] Furthermore, based on the above embodiments, the auxiliary grounding device 100 also includes a temperature sensor, which is attached to the clamping part 22 and / or the copper bus extension part 42 by thermally conductive silicone grease, and the temperature sensor is electrically connected to the controller.

[0073] For example, a temperature sensor specifically uses a thermistor. The thermistor's temperature is monitored in real time, and a temperature rise is a direct indication of excessive contact resistance or continuous leakage current. The thermistor is directly and tightly attached to the critical connection point of the mounting base 20 or the copper busbar extension 42 using thermally conductive silicone grease. When the connection point heats up due to increased resistance, the heat is conducted to the thermistor, causing its resistance to decrease as the temperature rises. Using a simple voltage divider circuit, the MCU's ADC can read the voltage value and calculate the temperature.

[0074] The controller is responsible for calculating and outputting the readings from both the current and temperature sensors. The controller synchronously reads the sampled values ​​of the current and temperature channels at fixed intervals and sets current and temperature thresholds to provide an alert.

[0075] In another embodiment, the auxiliary grounding device 100 also includes a warning status indicator light, which is mounted on the mounting base 20 and electrically connected to the controller. The warning status indicator light has at least three display colors: red, yellow, and street light.

[0076] Specifically, a red light indicates that the temperature has exceeded the threshold and a fault current has been detected. A yellow light indicates that the temperature is trending upward. A green light indicates that the temperature is normal and there is no fault current. This allows staff to more intuitively understand the grounding situation.

[0077] In addition to the above, this application also proposes a low-voltage grounding device, which includes a grounding wire and an auxiliary grounding device 100 as described in any of the above embodiments, wherein the grounding clamp of the grounding wire is detachably connected to the copper busbar extension 42 of the auxiliary grounding device 100.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An auxiliary grounding device, characterized in that, include: Actuating components; The mounting base has a clamping cavity and a clamping portion for forming the clamping cavity; A clamping assembly is movably disposed on the mounting base and connected to the actuating component. The clamping assembly and the clamping part cooperate to form the clamping cavity. The actuating component can drive the clamping assembly to move closer to or away from the clamping part. as well as A transition copper busbar is disposed outside the mounting base, and the transition copper busbar has a copper busbar extension for being disposed perpendicular to the grounding copper busbar.

2. The auxiliary grounding device according to claim 1, characterized in that, The clamping assembly includes an active slider and a clamping slider, which are stacked on the mounting base. The active slider is located on the side of the clamping slider away from the clamping part. The clamping slider and the clamping part are spaced apart to form the clamping cavity, which is used for the grounding copper busbar to extend into. The actuation component is connected to the active slider so that by driving the active slider to slide, the clamping slider moves closer to or away from the clamping part, thereby clamping or releasing the grounding copper busbar.

3. The auxiliary grounding device according to claim 2, characterized in that, The active slider has a first inclined surface on the side facing the clamping slider, and the clamping slider has a second inclined surface on the side facing the active slider, with the first inclined surface and the second inclined surface being adapted and fitted together; The first inclined surface is provided with a first locking protrusion and a first locking groove, and the second inclined surface is provided with a second locking protrusion and a second locking groove. The first locking protrusion is slidably locked in the second locking groove, and the second locking protrusion is slidably locked in the first locking groove.

4. The auxiliary grounding device according to claim 2, characterized in that, The mounting base includes a first mounting part with a threaded through hole. The active slider has a threaded hole that aligns with the threaded through hole. The actuation component includes a screw, an insulating rod, and an operating handle. The operating handle is connected to one end of the insulating rod, and the screw is detachably connected to the other end of the insulating rod. The screw is threaded through the threaded through hole and threaded into the threaded hole.

5. The auxiliary grounding device according to claim 4, characterized in that, The auxiliary grounding device further includes a first mounting component and a second mounting component. The mounting base further includes a second mounting portion connected to the first mounting portion and spaced apart from the clamping portion. The second mounting portion has a guide hole. One end of the first mounting component is connected to the active slider, and the other end of the first mounting component is slidably disposed in the guide hole. The adapter copper busbar also includes a copper busbar mounting part connected to the copper busbar extension, and the copper busbar mounting part is fixed to the outer side of the clamping part by the second mounting member.

6. The auxiliary grounding device according to claim 5, characterized in that, The mounting base further includes a constraint portion connected to the second mounting portion and disposed at a distance from the first mounting portion. The constraint portion and the clamping portion are spaced apart to form an inlet and outlet, and the inlet and outlet communicate with the clamping cavity. The constraint part slides into contact with the clamping slider.

7. The auxiliary grounding device according to any one of claims 1 to 6, characterized in that, The auxiliary grounding device also includes a controller and a current sensor. The current sensor is mounted on the copper busbar extension and is electrically connected to the controller.

8. The auxiliary grounding device according to claim 7, characterized in that, The auxiliary grounding device also includes a temperature sensor, which is attached to the clamping part and / or the copper busbar extension part by thermally conductive silicone grease, and the temperature sensor is electrically connected to the controller.

9. The auxiliary grounding device according to claim 8, characterized in that, The auxiliary grounding device also includes a warning status indicator light, which is mounted on the mounting base and electrically connected to the controller. The warning status indicator light has at least three display colors: red, yellow, and street light.

10. A low-voltage grounding device, characterized in that, include: Grounding wire; as well as The auxiliary grounding device as described in any one of claims 1 to 9, wherein the grounding clamp of the grounding wire is detachably connected to the copper busbar extension of the auxiliary grounding device.

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