Low-voltage power distribution cabinet bus grounding device

Abstract

This utility model discloses a low-voltage distribution cabinet busbar grounding device, which includes a pull-out base, an operating handle, an indicating mechanism, and voltage testing terminals. The pull-out base is detachably connected to the distribution cabinet, with its second end adjacent to the cabinet. A busbar connector and a switch are disposed within the pull-out base. The busbar connector is located at the second end of the pull-out base, with its first end connected to the busbar of the distribution cabinet and its second end connected to the first end of the switch. The second end of the switch is connected to the ground wire of the distribution cabinet. The operating handle is located at the first end of the pull-out base and is kinetically connected to the switch to drive the switch to connect or disconnect the path between the busbar connector and the ground wire. The indicating mechanism includes a circuit conversion unit and an indicator light. The circuit conversion unit is arranged within the pull-out base, and the indicator light is arranged at the first end of the pull-out base. The low-voltage distribution cabinet busbar grounding device provided by this utility model has the advantages of convenient operation and good safety.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage distribution cabinet technology, and in particular to a low-voltage distribution cabinet busbar grounding device. Background Technology

[0002] Currently, in the power industry, during the maintenance and repair of low-voltage distribution cabinets, it is common practice to install grounding wires on the distribution cabinet busbars to ground the equipment and ensure the safety of maintenance personnel.

[0003] The busbars of a distribution cabinet are usually enclosed inside the cabinet. After each power outage, the rear cover of the distribution cabinet must be removed to expose the busbars before grounding work can be carried out. However, due to the heavy weight of the rear cover, removing and restoring it is time-consuming and labor-intensive, resulting in low maintenance efficiency. Furthermore, if neighboring distribution cabinets are not simultaneously de-energized, there is a significant risk of electric shock to personnel during the removal and installation of the rear cover. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this utility model propose a low-voltage distribution cabinet busbar grounding device, which has the advantages of convenient operation and good safety.

[0005] According to an embodiment of the present invention, a low-voltage distribution cabinet busbar grounding device includes a pull-out base, an operating handle, an indicating mechanism, and a voltage testing terminal. The pull-out base is detachably connected to the distribution cabinet. The second end of the pull-out base is adjacent to the distribution cabinet. A busbar connector and a switch are disposed inside the pull-out base. The busbar connector is located at the second end of the pull-out base. The first end of the busbar connector is connected to the busbar of the distribution cabinet. The second end of the busbar connector is connected to the first end of the switch. The second end of the switch is connected to the ground wire of the distribution cabinet. The operating handle is located at the first end of the pull-out base. The operating handle is connected to the switch drive to drive the switch to connect or disconnect the path between the busbar connector and the ground wire. The indicating mechanism includes a circuit conversion unit and an indicator light. The circuit conversion unit is arranged inside the pull-out base. The input end of the circuit conversion unit is connected to the second end of the busbar connector. The indicator light is arranged at the first end of the pull-out base. The output end of the circuit conversion unit is connected to the input end of the indicator light. The voltage testing terminal is located at the first end of the pull-out base in the distribution cabinet, and the voltage testing terminal is connected to the second end of the busbar connector.

[0006] The low-voltage distribution cabinet busbar grounding device according to the embodiments of this utility model has the advantages of convenient operation and good safety. This application achieves grounding by cooperating with the distribution cabinet through a pull-out base, eliminating the need to disassemble the distribution cabinet's rear cover. This simplifies the operation and avoids the risk of electric shock during the rear cover disassembly process, ensuring good safety.

[0007] In some embodiments, the low-voltage distribution cabinet bus grounding device further includes a lock box and a locking pin. The lock box is located at the first end of the pull-out base. The lock box has an arc-shaped groove for accommodating the operating handle. The lock box is provided with a first positioning hole and a second positioning hole. The operating handle is provided with a locking hole.

[0008] When the operating handle drives the switch to open the passage between the busbar connector and the ground wire, the locking pin passes through the locking hole and the first positioning hole; when the operating handle drives the switch to close the passage between the busbar connector and the ground wire, the locking pin passes through the locking hole and the second positioning hole.

[0009] In some embodiments, the low-voltage distribution cabinet bus grounding device further includes a pull-out lock, which is arranged at the first end of the pull-out base, and the locking tongue of the pull-out lock can be inserted into the lock hole of the distribution cabinet.

[0010] In some embodiments, the low-voltage distribution cabinet bus grounding device further includes a conductive spring, the first segment of which is connected to the second end of the switch, and the second end of which extends out of the pull-out base and abuts against the ground wire of the distribution cabinet.

[0011] In some embodiments, the distribution cabinet is provided with a load switch area, and the load switch unit of the distribution cabinet is detachably arranged in the load switch area;

[0012] Wherein, when the load switch unit is moved out of the load switch area, the pull-out seat is detachably arranged in the load switch area.

[0013] In some embodiments, the load switch area is provided with guide rails, and the pull-out bracket is inserted into the distribution cabinet through the guide rails. The guide rails extend along the pull-out direction of the pull-out bracket and are slidably engaged with the pull-out bracket.

[0014] In some embodiments, the switch is a knife switch, and the operating handle is connected to the knife switch via an insulating component.

[0015] In some embodiments, the low-voltage distribution cabinet bus grounding device further includes a grounding resistance monitoring mechanism, which includes a test power supply, a test circuit unit, and a buzzer. The test terminals of the test circuit unit are respectively connected to the ground wire and the second terminal of the switch. The test power supply is electrically connected to the test circuit unit, and the buzzer is connected to the test circuit unit.

[0016] In some embodiments, the low-voltage distribution cabinet bus grounding device further includes an observation window, which is arranged at the first end of the pull-out base for easy observation.

[0017] In some embodiments, the busbar of the distribution cabinet includes a first phase wire, a second phase wire, and a third phase wire; the busbar connector includes a first connector, a second connector, and a third connector; the switch includes a first path, a second path, and a third path; the two ends of the first connector are respectively connected to the first phase wire and the first path; the two ends of the second connector are respectively connected to the second phase wire and the second path; and the two ends of the third connector are respectively connected to the third phase wire and the third path. Attached Figure Description

[0018] Figure 1 This is a circuit diagram of the low-voltage distribution cabinet bus grounding device according to an embodiment of this utility model.

[0019] Figure 2 This is a structural schematic diagram of the low-voltage distribution cabinet bus grounding device according to an embodiment of this utility model.

[0020] Reference numerals: 1. Pull-out base; 2. Busbar connector; 3. Switch; 4. Operating handle;

[0021] 5. Indicating mechanism; 51. Circuit conversion unit; 52. Indicator light;

[0022] 6. Voltage testing terminal; 7. Lock box; 8. Locking pin; 9. Pull-out lock; 10. Conductive spring; 11. Observation window; 12. Handle;

[0023] 100, busbar; 200, ground wire. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] According to an embodiment of the present invention, the grounding device for the low-voltage distribution cabinet busbar 100 includes a pull-out base 1, an operating handle 4, an indicating mechanism 5, and a voltage testing terminal 6. The pull-out base 1 is detachably connected to the distribution cabinet. The second end of the pull-out base 1 is adjacent to the distribution cabinet. A busbar connector 2 and a switch 3 are provided inside the pull-out base 1. The busbar connector 2 is located at the second end of the pull-out base 1. The first end of the busbar connector 2 is connected to the busbar 100 of the distribution cabinet, and the second end of the busbar connector 2 is connected to the first end of the switch 3. The second end of the switch 3 is connected to the ground wire of the distribution cabinet. The operating handle 4 is located at the pull-out base 1. At the first end of the base 1, the operating handle 4 is connected to the switch 3 to drive the switch 3 to open or close the path between the bus connector 2 and the ground wire. The indicating mechanism 5 includes a circuit conversion unit 51 and an indicator light 52. The circuit conversion unit 51 is arranged inside the pull-out base 1. The input end of the circuit conversion unit 51 is connected to the second end of the bus connector 2. The indicator light 52 is arranged at the first end of the pull-out base 1. The output end of the circuit conversion unit 51 is connected to the input end of the indicator light 52. The voltage testing terminal 6 is located at the first end of the pull-out base 1 in the distribution cabinet and is connected to the second end of the bus connector 2.

[0026] The pull-out base 1 is detachably connected to the distribution cabinet for easy maintenance and repair. When needed, the pull-out base 1 can be removed from the distribution cabinet. The cooperation of busbar connector 2 and switch 3 enables rapid and reliable grounding of the equipment, ensuring the safety of maintenance personnel. Personnel only need to control switch 3 via operating handle 4 to connect and disconnect the grounding path, avoiding the risks of direct contact with the live busbar 100 and disassembling the heavy back panel of the distribution cabinet, thus improving operational safety and preventing danger from personnel being too close to adjacent live distribution cabinets when disassembling the back panel or performing wiring. The busbar connector 2 can be a plug-in connector structure, corresponding to a socket structure for the busbar 100. The busbar connector 2 and busbar 100 are plugged in for conduction, or the busbar connector 2 can use a contact structure to overlap and conduct with the busbar 100. The busbar 100 of the distribution cabinet is used to conduct electrical energy; for example, busbar 100 has three wires for transmitting three-phase power.

[0027] The operating handle 4 is located at the first end of the pull-out base 1, allowing operators to control the grounding path from outside the distribution cabinet without entering the cabinet. The operating handle 4 also avoids direct contact with the switch 3. The indicating mechanism 5 indicates the current status of the distribution cabinet, providing personnel with a clear understanding of the busbar 100's status and preventing grounding operations while the busbar 100 is energized, thus effectively preventing electric shock accidents. The circuit conversion unit 51 can be a circuit board including voltage regulator circuits and rectifier circuits. The circuit conversion unit 51 converts the electrical energy of the busbar 100 into the electrical energy required by the indicator light 52.

[0028] Optionally, for the multi-phase power transmitted by the bus 100, the circuit conversion unit 51 and the indicator light 52 are arranged for each wire of the bus 100. One set of circuit conversion units 51 and indicator lights 52 corresponds to the energized state between phase A and phase B, and another set of circuit conversion units 51 and indicator lights 52 is used to indicate the energized state between phase B and phase C.

[0029] The voltage testing terminal 6 provides operators with an additional verification method to confirm whether bus 100 is energized. This is especially important before grounding operations to ensure that bus 100 is completely de-energized. Through the voltage testing terminal 6, operators can use external voltage testing equipment for dual verification, further improving the safety and reliability of grounding operations. The voltage testing terminal 6 has a terminal structure, allowing personnel to directly test for voltage using a voltage tester or voltage detector.

[0030] The grounding device for the low-voltage distribution cabinet busbar 100 according to the embodiments of this utility model has the advantages brought about by the independent claims.

[0031] In some embodiments, the grounding device of the low-voltage distribution cabinet bus 100 further includes a lock box 7 and a locking pin 8. The lock box 7 is located at the first end of the pull-out seat 1. The lock box 7 has an arc-shaped groove for accommodating the operating handle 4. The lock box 7 is provided with a first positioning hole and a second positioning hole. The operating handle 4 is provided with a locking hole.

[0032] When the operating handle 4 drives the switch 3 to connect the busbar connector 2 and the ground wire, the locking pin 8 passes through the locking hole and the first positioning hole; when the operating handle 4 drives the switch 3 to disconnect the busbar connector 2 and the ground wire, the locking pin 8 passes through the locking hole and the second positioning hole.

[0033] Specifically, the arc-shaped groove of the lock box 7 provides movement space for the operating handle 4. The first and second positioning holes of the lock box 7 correspond to the positions of the operating handle 4 in the two states of ground wire conduction and ground wire disconnection, respectively. The locking pin 8 passes through the positioning hole and the locking hole on the operating handle 4 to fix the position of the operating handle 4, thus preventing the operator from accidentally moving the handle and avoiding safety accidents caused by misoperation. By locking the position of the operating handle 4, it can be ensured that the grounding device remains stable during operation, improving the reliability and safety of grounding operation.

[0034] Optionally, the first end of the locking pin 8 is connected to the pull lock 9 via a chain or ring, and the second end of the locking pin 8 is provided with a ring hole, through which a padlock can be passed to lock the locking pin 8, preventing unauthorized personnel from removing the locking pin 8 and improving security.

[0035] In some embodiments, the grounding device of the low-voltage distribution cabinet bus 100 further includes a pull-out lock 9, which is arranged at the first end of the pull-out base 1, and the locking tongue of the pull-out lock 9 can be inserted into the lock hole of the distribution cabinet.

[0036] Specifically, the latch of the pull-out lock 9 engages with the lock hole of the distribution cabinet. When the latch enters the lock hole, it can fix the position of the pull-out seat 1, preventing it from loosening or shifting. When it is necessary to disassemble the pull-out seat 1, the pull-out lock 9 can be operated to disengage the latch from the lock hole, thus facilitating the removal of the pull-out seat 1 from the distribution cabinet. The pull-out lock 9 is used to restrict and fix the pull-out seat 1. In addition, when part of the pull-out seat 1 is outside the distribution cabinet, the latch of the pull-out lock 9 can prevent the pull-out seat 1 from entering the distribution cabinet.

[0037] In some embodiments, the grounding device of the low-voltage distribution cabinet busbar 100 further includes a conductive spring 10, the first segment of which is connected to the second end of the switch 3, and the second end of which extends out of the pull-out seat 1 and abuts against the ground wire of the distribution cabinet.

[0038] Specifically, the conductive spring 10 is elastic, ensuring a good electrical connection with the ground wire. During the movement and disassembly of the pull-out seat 1, the conductive spring 10 maintains contact with the ground wire based on its own elasticity, ensuring a reliable grounding connection. The elastic structure of the conductive spring 10 reduces the risk of loose grounding connection, lowers maintenance costs, and improves the long-term reliability of the grounding device. The conductive spring 10 can be an elastic arc-shaped metal sheet or a metal sheet with a bend. There is a certain distance between the two ends of the arc-shaped or bent metal sheet. This distance can be reduced by external force. At this time, the elastic potential energy of the metal sheet increases. When the external force is removed, the metal sheet returns to its original shape, and one end of the metal sheet extends out of the pull-out seat 1 and abuts against the grounding copper busbar of the distribution cabinet.

[0039] Optionally, a temperature compensation component is also included. This component is attached to one side of the conductive spring 10 to increase its elastic potential energy. The temperature compensation component ensures that the conductive spring 10 maintains good elasticity under different ambient temperatures, enhancing the environmental adaptability of the grounding device. The temperature compensation component can be a spring or an alloy metal sheet. The alloy metal sheet is composed of two metals with different thermal expansion systems. When the temperature changes, the alloy metal sheet contracts to different degrees, causing bending that compensates for the elastic changes in the conductive spring 10. A spring is arranged between the two ends of the conductive spring 10. The spring is made of stainless steel or other materials with stable elastic properties at different temperatures. When temperature changes cause changes in the elasticity of the conductive spring 10, the spring compensates for these changes through its own elastic deformation, maintaining good contact between the conductive spring 10 and the ground wire.

[0040] In some embodiments, the distribution cabinet is provided with a load switch 3 area, and the load switch 3 unit of the distribution cabinet is detachably arranged in the load switch 3 area;

[0041] When the load switch 3 module is moved out of the load switch 3 area, the pull-out seat 1 is detachably arranged in the load switch 3 area.

[0042] Specifically, the shape and size of the pull-out bracket 1 are the same as those of the load switch unit 3. During maintenance, the load switch unit 3 is moved out of the load switch unit 3 area, and the pull-out bracket 1 is moved into the load switch unit 3 area to achieve 100% grounding of the busbar. After maintenance, the load switch unit 3 is returned to its original position in the reverse order. The pull-out bracket 1 is installed using the load switch unit 3 area of ​​the distribution cabinet, without occupying additional internal space of the distribution cabinet, thus improving space utilization efficiency. Grounding operations can be completed simply by removing and installing the pull-out bracket 1, improving maintenance efficiency and ensuring personnel safety.

[0043] In some embodiments, a guide rail is arranged in the load switch 3 area, and the pull-out seat 1 is inserted into the distribution cabinet through the guide rail. The guide rail extends along the pull-out direction of the pull-out seat 1 and is slidably engaged with the pull-out seat 1.

[0044] Specifically, the guide rail extends along the pulling direction of the pull-out seat 1. The pull-out seat 1 is inserted into the distribution cabinet via the guide rail. The pull-out seat 1 can be pulled out of the distribution cabinet until it detaches from the guide rail. The guide rail and the pull-out seat 1 are slidably engaged to ensure the smooth movement of the pull-out seat 1, guaranteeing its positioning accuracy and reducing manual adjustment. Personnel only need to push the pull-out seat 1 in or pull it out of the distribution cabinet, avoiding poor contact or damage caused by shaking or tilting. In addition, the load switch unit 3 can share the same guide rail with the pull-out seat 1, making switching between the load switch unit 3 and the pull-out seat 1 more convenient and faster.

[0045] In some embodiments, switch 3 is a knife switch, and operating handle 4 is connected to the knife switch via an insulating component.

[0046] Specifically, the operating handle 4 is connected to the knife switch via an insulating component. This insulating component provides electrical isolation between the operating handle 4 and the knife switch, preventing electric shock. The insulating component can be made of materials such as polytetrafluoroethylene (PTFE) or epoxy resin, possessing certain mechanical strength and good insulation properties. The knife switch has a simple structure, providing a safe and intuitive way to switch the circuit on and off. The insulating component can be an insulating rod, with the operating handle 4 connected to the knife switch handle via the insulating rod; or it can be an insulating gear, with the operating handle 4 connected to the knife switch handle's rotating shaft via the insulating gear; or it can be an insulating shaft, with the insulating shaft of the operating handle 4 coaxially arranged with the knife switch handle's rotating shaft, allowing the operating handle 4 to directly drive the rotation of the knife switch handle.

[0047] In some embodiments, the grounding device of the low-voltage distribution cabinet busbar 100 further includes a grounding resistance monitoring mechanism. The grounding resistance monitoring mechanism includes a test power supply, a test circuit unit and a buzzer. The test terminals of the test circuit unit are respectively connected to the ground wire and the second terminal of the switch 3. The test power supply is electrically connected to the test circuit unit and the buzzer is connected to the test circuit unit.

[0048] Specifically, the grounding resistance monitoring mechanism is used to test the grounding path. The testing unit uses a low-voltage DC power supply to provide a stable power source for the grounding resistance test. The testing circuit unit includes measurement and processing circuits to measure the grounding resistance and process the measurement data. A buzzer sounds an alarm when the grounding resistance exceeds a preset range to alert personnel. A known test current is injected into the grounding path by the test power supply, and the grounding resistance is determined by measuring the test current and voltage. The grounding resistance monitoring mechanism monitors changes in grounding resistance in real time to ensure the safety and reliability of the grounding line, and the buzzer promptly alerts personnel to take measures to prevent safety accidents caused by poor grounding.

[0049] In some embodiments, the grounding device of the low-voltage distribution cabinet bus 100 further includes an observation window 11, which is arranged at the first end of the pull-out seat 1 for easy observation.

[0050] Specifically, the observation window 11 is made of transparent materials such as polycarbonate or acrylic, which has good light transmittance and mechanical strength while also providing excellent insulation. The position and size of the observation window 11 are designed to facilitate easy observation of the switch 3 and conductive spring 10 inside the pull-out base 1. Through the observation window 11, the operator can directly see the status of the components inside the pull-out base 1, such as the position of the switch 3 and the contact status of the conductive spring 10. During grounding operations, the position of the operating handle 4 can be directly observed and confirmed to ensure the continuity and disconnection of the grounding path.

[0051] Optionally, an LED light can be arranged on one side of the observation window 11 inside the pull-out seat 1 to increase illumination and ensure that the operator can still clearly see the status inside the pull-out seat 1 in a dimly lit environment.

[0052] A handle 12 is located at the first end of the pull-out seat 1, making it easier for operators to grip and pull the handle 12 to push and pull the pull-out seat 1. The handle 12 is made of insulating material. The handle 12 can be a U-shaped buckle structure, and multiple handles 12 can be provided. The pull-out lock 9 can be arranged on the handle 12. The handle 12 is used for gripping and pushing / pulling the pull-out seat 1, and the specific type of handle 12 can be adjusted according to actual needs.

[0053] In some embodiments, the busbar 100 of the distribution cabinet includes a first phase wire, a second phase wire, and a third phase wire; the busbar connector 2 includes a first connector, a second connector, and a third connector; the switch 3 includes a first path, a second path, and a third path; the two ends of the first connector are respectively connected to the first phase wire and the first path; the two ends of the second connector are respectively connected to the second phase wire and the second path; and the two ends of the third connector are respectively connected to the third phase wire and the third path.

[0054] Specifically, the first connector connects the first phase wire to the first path of switch 3, and the first path of switch 3 is connected to the ground wire to ground the first phase wire. The second connector also grounds the second phase wire, and the third connector also grounds the third phase wire. A single drive of switch 3 by the operating handle 4 can simultaneously ground the first, second, and third phase wires, ensuring safe maintenance of the distribution cabinet. The first, second, and third phase wires are used to transmit the three-phase power of the distribution cabinet.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0056] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly 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, an electrical connection, or a connection that allows communication between them; 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0059] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A low-voltage distribution cabinet busbar grounding device, characterized in that, include: A pull-out bracket is detachably connected to a power distribution cabinet. The second end of the pull-out bracket is adjacent to the power distribution cabinet. A busbar connector and a switch are provided inside the pull-out bracket. The busbar connector is located at the second end of the pull-out bracket. The first end of the busbar connector is connected to the busbar of the power distribution cabinet. The second end of the busbar connector is connected to the first end of the switch. The second end of the switch is connected to the ground wire of the power distribution cabinet. An operating handle is located at the first end of the pull-out seat. The operating handle is connected to the switch drive to drive the switch to open or close the path between the busbar connector and the ground wire. The indicating mechanism includes a circuit conversion unit and an indicator light. The circuit conversion unit is arranged inside the pull-out base. The input end of the circuit conversion unit is connected to the second end of the bus connector. The indicator light is arranged at the first end of the pull-out base. The output end of the circuit conversion unit is connected to the input end of the indicator light. A voltage testing terminal is provided at the first end of the pull-out base located in the distribution cabinet, and the voltage testing terminal is connected to the second end of the busbar connector.

2. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, It also includes a lock box and a locking pin. The lock box is located at the first end of the pull-out base. The lock box has an arc-shaped groove for accommodating the operating handle. The lock box is provided with a first positioning hole and a second positioning hole. The operating handle is provided with a locking hole. When the operating handle drives the switch to open the passage between the busbar connector and the ground wire, the locking pin passes through the locking hole and the first positioning hole; when the operating handle drives the switch to close the passage between the busbar connector and the ground wire, the locking pin passes through the locking hole and the second positioning hole.

3. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, It also includes a pull-out lock, which is arranged at the first end of the pull-out base, and the latch of the pull-out lock can be inserted into the lock hole of the power distribution cabinet.

4. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, It also includes a conductive spring, the first segment of which is connected to the second end of the switch, and the second end of which extends out of the pull-out base and abuts against the ground wire of the distribution cabinet.

5. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, The distribution cabinet is provided with a load switch area, and the load switch unit of the distribution cabinet is detachably arranged in the load switch area; Wherein, when the load switch unit is moved out of the load switch area, the pull-out seat is detachably arranged in the load switch area.

6. The low-voltage distribution cabinet busbar grounding device according to claim 5, characterized in that, The load switch area is provided with guide rails, and the pull-out bracket is inserted into the distribution cabinet through the guide rails. The guide rails extend along the pull-out direction of the pull-out bracket and are slidably engaged with the pull-out bracket.

7. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, The switch is a knife switch, and the operating handle is connected to the knife switch via an insulating component.

8. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, It also includes a grounding resistance monitoring mechanism, which includes a test power supply, a test circuit unit and a buzzer. The test terminals of the test circuit unit are respectively connected to the ground wire and the second terminal of the switch. The test power supply is electrically connected to the test circuit unit and the buzzer is connected to the test circuit unit.

9. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, It also includes an observation window, which is arranged at the first end of the pull-out base for easy observation.

10. The low-voltage distribution cabinet busbar grounding device according to claim 1, characterized in that, The busbar of the distribution cabinet includes a first phase line, a second phase line, and a third phase line. The busbar connector includes a first connector, a second connector, and a third connector. The switch includes a first path, a second path, and a third path. The two ends of the first connector are respectively connected to the first phase line and the first path. The two ends of the second connector are respectively connected to the second phase line and the second path. The two ends of the third connector are respectively connected to the third phase line and the third path.

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