Grounding structure and switch cabinet with same

Abstract

The application provides a grounding structure and a switch cabinet with the same, and the grounding structure comprises a grounding busbar and a protection assembly, the grounding busbar comprises a busbar body, a grounding piece and a contact electric piece, and the grounding piece and the contact electric piece are arranged on the busbar body at intervals; the protection assembly has a protection space, and the protection assembly is an insulating piece; the protection assembly is covered on the grounding busbar; the length size of the busbar body is L1, and 70mm<=L1<=150mm; and the width size of the busbar body is L2, and 50mm<=L2<=70mm. The grounding piece and the contact electric piece are arranged in the protection space to protect the grounding piece and the contact electric piece; the length size of the busbar body is increased from the original 40mm to at least 70mm, so that there is enough exposed position to facilitate grounding, and the extended size makes the safety distance between the grounding piece and the contact electric piece meet the relevant requirements, thereby solving the problem that the switch cabinet in the prior art is not convenient for grounding work.

Description

Technical Field

[0001] This invention relates to the field of grounding copper busbar technology, and more specifically, to a grounding structure and a switch cabinet having the same. Background Technology

[0002] Power outages are a crucial part of routine operations for the construction and maintenance of power distribution lines. Before any outage, maintenance personnel must verify and ground the load side of the line. However, existing transformer low-voltage switchgear comes in many varieties, and the load side of the low-voltage main switch (knife switch) in most box-type substations and some platform-type substations is not designed with a pre-reserved grounding location. The compact switchgear and narrow exposed copper busbar area make grounding before operation particularly difficult. Failure to reliably ground the switchgear can also increase the risk of electric shock from backfeeding during subsequent operations. Summary of the Invention

[0003] The main objective of this invention is to provide a grounding structure and a switch cabinet having the same, so as to solve the problem that the switch cabinets in the prior art are not convenient for grounding.

[0004] To achieve the above objectives, according to one aspect of the present invention, a grounding structure is provided, comprising: a grounding busbar including a busbar body, a grounding element, and a conductive element, the grounding element and the conductive element being spaced apart on the busbar body; the grounding element being used to connect to a grounding conductor; the conductive element being used to connect to a conductive line of an electrical device; and a protective component having a protective space, the protective component being an insulating component; the protective component covering the grounding busbar so that the grounding element and the conductive element are disposed within the protective space to protect the grounding element and the conductive element; wherein the length dimension of the busbar body is L1, 70mm≤L1≤150mm; and the width dimension of the busbar body is L2, 50mm≤L2≤70mm.

[0005] Furthermore, the value range of L1 is: L1 = 70 mm; and / or the value range of L2 is: L2 = 50 mm.

[0006] Furthermore, the grounding component and the conductive component are spaced apart along the width direction of the busbar body; the distance between the grounding component and the conductive component is L3, where L3 ≥ 30 mm; and / or the grounding component is a bolt; the conductive component is a bolt; and / or the protective component is made of acrylic material.

[0007] Furthermore, the protective component includes: a first connector and a second connector, which are spaced apart along the length of the busbar body; a grounding component and a conductive component are disposed between the first connector and the second connector; wherein the first connector and the second connector are movably disposed in a direction that is closer to or further away from each other.

[0008] Furthermore, the protective assembly also includes: a first partition plate having a first plug-in portion, and a first connector having a second plug-in portion, for connecting the first partition plate and the first connector by plugging in the first plug-in portion and the second plug-in portion; a second partition plate having a third plug-in portion, and a second connector having a fourth plug-in portion, for connecting the second partition plate and the second connector by plugging in the third plug-in portion and the fourth plug-in portion.

[0009] Furthermore, the protective assembly also includes: a protective top plate having a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion being spaced apart along the length direction of the protective top plate, so as to be connected to the first connector and the second connector in a one-to-one correspondence through the first mounting portion and the second mounting portion respectively; wherein, the length dimension of the protective top plate is L4, L4>L1; the width dimension of the protective top plate is L5, L5>L2.

[0010] Furthermore, the grounding component and the conductive component are spaced apart along the width direction of the busbar body; the protective assembly also includes: a third partition plate, disposed between the grounding component and the conductive component to separate the grounding component and the conductive component; the two ends of the third partition plate are respectively connected to the first connector and the second connector; a first wire guide plate, disposed on the side of the busbar body near the grounding component, the first wire guide plate is provided with a first wire guide hole so that the grounding wire passes through the first wire guide hole and is connected to the grounding component; a second wire guide plate, disposed on the side of the busbar body near the conductive component, the second wire guide plate is provided with a second wire guide hole so that the conductive wire of the electrical equipment passes through the second wire guide hole and is connected to the conductive component.

[0011] Furthermore, the protective assembly also includes: a first protective plate, on which a first wiring plate is detachably mounted; the first protective plate is connected to the protective top plate of the protective assembly via a first top plate connector to protect the grounding component; a second protective plate, disposed opposite to the first protective plate, on which a second wiring plate is detachably mounted; the second protective plate is connected to the protective top plate via a second top plate connector to protect the conductive component; wherein, a protective space is formed between the first protective plate, the second protective plate, the protective top plate, the first partition plate of the protective assembly, and the second partition plate of the protective assembly to cover the grounding busbar.

[0012] Furthermore, the grounding structure also includes two mounting brackets, which are connected to the busbar body by two fixing bolts respectively. The two mounting brackets are respectively set at both ends of the busbar body to support the grounding busbar.

[0013] According to another aspect of the present invention, a switch cabinet is provided, including the above-described grounding structure, wherein the conductive element of the grounding structure is used to connect with the conductive line of the switch cabinet.

[0014] By applying the technical solution of this invention, a grounding structure is provided. The grounding structure includes a grounding busbar and a protective component. The grounding busbar includes a busbar body, a grounding element, and a conductive element, which are spaced apart on the busbar body. The protective component has a protective space and is an insulating component. The protective component covers the grounding busbar. The length of the busbar body is L1, 70mm≤L1≤150mm; the width of the busbar body is L2, 50mm≤L2≤70mm. By setting the grounding element for connection with the grounding conductor; by setting the conductive element for connection with the conductive wire of the electrical equipment; by placing the grounding element and the conductive element within the protective space to protect them; and by increasing the length of the busbar body from the original 40mm to a minimum of 70mm to ensure sufficient exposed space for grounding, and by extending the length so that the safe distance between the grounding element and the conductive element meets relevant regulations, the problem of inconvenient grounding work in existing switchgear is solved. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 An exploded view of an embodiment of the grounding structure according to the present invention is shown;

[0017] Figure 2 A schematic diagram of the protective top plate of the grounding structure according to the present invention is shown;

[0018] Figure 3 A schematic diagram of the structure of the first partition plate of the grounding structure according to the present invention is shown;

[0019] Figure 4 A schematic diagram of the structure of the second separator plate according to the grounding structure of the present invention is shown;

[0020] Figure 5 A schematic diagram of the grounding busbar according to the grounding structure of the present invention is shown;

[0021] Figure 6 An exploded view of the structure of the first protective plate of the grounding structure according to the present invention is shown;

[0022] Figure 7 A schematic diagram of the structure of the first protective plate and the first top plate connector of the grounding structure according to the present invention is shown;

[0023] Figure 8 A schematic diagram of the structure of the first wiring plate of the grounding structure according to the present invention is shown;

[0024] Figure 9 A schematic diagram of the third separator plate of the grounding structure according to the present invention is shown.

[0025] The above figures include the following reference numerals:

[0026] 1. Grounding busbar; 11. Busbar body; 12. Grounding component; 13. Conductive component; 2. Protective assembly; 21. First connector; 211. Second plug-in portion; 212. First side plug-in portion; 22. Second connector; 221. Fourth plug-in portion; 23. First partition plate; 231. First plug-in portion; 232. Fifth plug-in portion; 24. Second partition plate; 241. Third plug-in portion; 242. Sixth plug-in portion; 25. Third partition plate; 251, side insertion part; 26, first protective plate; 261, first mounting insertion part; 3, protective top plate; 31, first mounting part; 32, second mounting part; 33, mounting hole; 4, first wiring plate; 41, first wiring hole; 42, second mounting insertion part; 5, first top plate connector; 51, first top plate connector; 52, first side plate connector; 53, first connecting column; 6, mounting bracket; 7, fixing bolt. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Please refer to Figures 1 to 9 This invention provides a grounding structure, including a grounding busbar 1 and a protective component 2. The grounding busbar 1 includes a busbar body 11, a grounding element 12, and a conductive element 13, which are spaced apart on the busbar body 11. The grounding element 12 is used to connect to a grounding wire; the conductive element 13 is used to connect to a conductive wire of an electrical device. The protective component 2 has a protective space and is an insulating component. The protective component 2 covers the grounding busbar 1 so that the grounding element 12 and the conductive element 13 are placed within the protective space to protect them. The length of the busbar body 11 is L1, 70mm≤L1≤150mm; the width of the busbar body 11 is L2, 50mm≤L2≤70mm.

[0029] This invention provides a grounding structure, comprising a grounding busbar 1 and a protective component 2. By providing a grounding element 12 for connection to a grounding conductor, and a conductive element 13 for connection to the conductive wire of electrical equipment, the grounding element 12 and the conductive element 13 are protected within a protective space, thereby improving the stability of the grounding structure in harsh environments. Furthermore, by increasing the length of the busbar body 11 from the original 40mm to a minimum of 70mm, sufficient exposed space is ensured for grounding, and the extended length ensures that the safe distance between the grounding element 12 and the conductive element 13 meets relevant regulatory requirements, thus solving the problem of inconvenient grounding operations in existing switchgear.

[0030] Among them, the grounding busbar 1 is a conductor, which connects the grounding component 12 and the grounding component 13 through the busbar body 11, thereby making the conductive wire of the electrical equipment conductively connected to the grounding wire, so as to realize the voltage detection and grounding of the electrical equipment. The grounding busbar 1 is a grounding copper busbar.

[0031] Optionally, the length of the bus body 11 is L1, 70mm≤L1≤90mm; the width of the bus body 11 is L2, 50mm≤L2≤60mm.

[0032] Optionally, the length of the bus body 11 is L1, 70mm≤L1≤120mm; the width of the bus body 11 is L2, 50mm≤L2≤65mm.

[0033] Preferably, in order to ensure that the grounding structure has sufficient exposed space for grounding while minimizing the space occupied by the grounding structure, and since the minimum safe distance between the grounding component 12 and the conductive component 13 is 30mm, the value range of L1 is: L1 = 70mm; the value range of L2 is: L2 = 50mm. In a specific embodiment, the specific length dimension L1 and width dimension L2 of the bus body 11 are adapted to the grounding storage space of the switch cabinet.

[0034] Specifically, in order to facilitate the installation of grounding component 12 and conductive component 13, grounding component 12 and conductive component 13 are spaced apart along the width direction of busbar body 11; the distance between grounding component 12 and conductive component 13 is L3, where L3 ≥ 30 mm.

[0035] Optionally, the grounding component 12 is a bolt; the conductive component 13 is a bolt; and the protective component 2 is made of acrylic material.

[0036] Preferably, in order to facilitate monitoring the real-time usage status of the grounding component 12 and the conductive component 13, the protective component 2 is made of transparent acrylic material to facilitate observation and maintenance.

[0037] Specifically, in order to protect the grounding component 12 and the conductive component 13, the protective assembly 2 includes a first connector 21 and a second connector 22, which are spaced apart along the length of the busbar body 11. The grounding component 12 and the conductive component 13 are disposed between the first connector 21 and the second connector 22. The first connector 21 and the second connector 22 are movably disposed in a direction that is closer to or further away from each other, so as to increase the distance between the first connector 21 and the second connector 22 when the grounding component 12 is connected to the grounding wire and / or the conductive component 13 is connected to the conductive wire of the electrical equipment, so that the grounding component 12 and the conductive component 13 have a larger operating space around them to facilitate wiring operations. After the grounding component 12 is connected to the grounding wire and / or the conductive component 13 is connected to the conductive wire of the electrical equipment, the first connector 21 and the second connector 22 are moved to a suitable position to reduce the space occupancy rate of the protective space. At the same time, due to the reduction of the protective space, the protective space is less prone to dust accumulation and easier to clean.

[0038] The first connector 21 has a first sliding through hole, through which the first connector 21 is fitted onto the busbar body 11. The shape and size of the first sliding through hole are only for the first connector 21 to slide along the length extension direction of the busbar body 11. The second connector 22 has a second sliding through hole, through which the second connector 22 is fitted onto the busbar body 11. The shape and size of the second sliding through hole are only for the second connector 22 to slide along the length extension direction of the busbar body 11.

[0039] Furthermore, such as Figure 3 and Figure 4 As shown, in order to protect the sides of the grounding component 12 and the conductive component 13, the protective assembly 2 also includes a first partition plate 23 and a second partition plate 24. The first partition plate 23 has a first plug-in portion 231, and the first connector 21 has a second plug-in portion 211, so that the first partition plate 23 and the first connector 21 are connected by plugging the first plug-in portion 231 and the second plug-in portion 211. The second partition plate 24 has a third plug-in portion 241, and the second connector 22 has a fourth plug-in portion 221, so that the second partition plate 24 and the second connector 22 are connected by plugging the third plug-in portion 241 and the fourth plug-in portion 221, so as to achieve multi-directional protection for the grounding component 12 and the conductive component 13.

[0040] Similarly, as Figure 2As shown, in order to protect the top surfaces of the grounding component 12 and the conductive component 13, the protective assembly 2 also includes a protective top plate 3. The protective top plate 3 has a first mounting portion 31 and a second mounting portion 32. The first mounting portion 31 and the second mounting portion 32 are spaced apart along the length direction of the protective top plate 3, so as to be connected to the first connector 21 and the second connector 22 in a one-to-one correspondence through the first mounting portion 31 and the second mounting portion 32, respectively. The length dimension of the protective top plate 3 is L4, where L4 > L1; the width dimension of the protective top plate 3 is L5, where L5 > L2. Since impurities generally fall from the top, in order to improve the protection of the grounding busbar 1, the protective top plate 3 is arranged parallel to the busbar body 11, and the projected area of ​​the protective top plate 3 on the busbar body 11 is larger than the projected area of ​​the busbar body 11, so that the protective top plate 3 protrudes circumferentially from the busbar body 11.

[0041] Furthermore, the first partition plate 23 has a fifth insertion portion 232 for insertion into the first mounting portion, and the second partition plate 24 has a sixth insertion portion 242 for insertion into the second mounting portion.

[0042] Furthermore, such as Figure 8 and Figure 9 As shown, in order to provide protection for the grounding component 12 and the conductive component 13 while allowing the conductive wire and the grounding wire to pass through the protected space, the grounding component 12 and the conductive component 13 are spaced apart along the width direction of the busbar body 11; the protective assembly 2 also includes a third partition plate 25, a first wire-passing plate 4, and a second wire-passing plate. The third partition plate 25 is disposed between the grounding component 12 and the conductive component 13 to separate the grounding component 12 and the conductive component 13; the two ends of the third partition plate 25 are respectively connected to the first connector 21 and the second connector 22; the first wire-passing plate 4 is disposed on the side of the busbar body 11 near the grounding component 12, and the first wire-passing plate 4 is provided with a first wire-passing hole 41 so that the grounding wire passes through the first wire-passing hole 41 and connects to the grounding component 12; the second wire-passing plate is disposed on the side of the busbar body 11 near the conductive component 13, and the second wire-passing plate is provided with a second wire-passing hole so that the conductive wire of the electrical equipment passes through the second wire-passing hole and connects to the conductive component 13.

[0043] Specifically, such as Figures 6 to 8As shown, in order to further protect the grounding component 12 and the conductive component 13 after the grounding wire and the conductive wire pass through the space, the protective assembly 2 also includes a first protective plate 26 and a second protective plate. The first through-wire plate 4 is detachably mounted on the first protective plate 26. The first protective plate 26 is connected to the protective top plate 3 of the protective assembly 2 through the first top plate connector 5, so as to protect the grounding component 12 through the first protective plate 26. The second protective plate is arranged opposite to the first protective plate 26, and the second through-wire plate is detachably mounted on the second protective plate. The second protective plate is connected to the protective top plate 3 through the second top plate connector, so as to protect the conductive component 13 through the second protective plate. A protective space is formed between the first protective plate 26, the second protective plate, the protective top plate 3, the first partition plate 23 of the protective assembly 2, and the second partition plate 24 of the protective assembly 2, so as to cover the grounding busbar 1.

[0044] Specifically, the first connector 21 has a first side insertion portion 212, the second connector 22 has a second side insertion portion, and the two ends of the third partition plate 25 are respectively provided with side insertion portions 251. The first side insertion portion 212 is connected to one of the side insertion portions 251, and the second side insertion portion is connected to the other side insertion portion 251, so that the two ends of the third partition plate 25 are respectively connected to the first connector 21 and the second connector 22; optionally, the third partition plate 25 is connected to both the first partition plate 23 and the second partition plate 24, or the third partition plate 25 is not connected to the first partition plate 23 and the second partition plate 24.

[0045] Furthermore, the first wiring plate 4 has a second mounting connector 42, and the first protective plate 26 has a first mounting connector 261, so that the first wiring plate 4 and the first protective plate 26 can be detached and connected through the second mounting connector 42 and the first mounting connector 261, so that the grounding wire can enter the protective space after passing through the first wiring plate 4; the second wiring plate has a fourth mounting connector, and the second protective plate has a third mounting connector, so that the second wiring plate and the second protective plate can be detached and connected through the fourth mounting connector and the third mounting connector, so that the conductive wire can enter the protective space after passing through the second wiring plate.

[0046] Optionally, the first top plate connector 5 includes a first top plate connecting portion 51 and a first side plate connecting portion 52 connected to each other. The plane of the first top plate connecting portion 51 is perpendicular to the plane of the first side plate connecting portion 52, so that the first top plate connecting portion 51 and the first side plate connecting portion 52 are L-shaped connecting plates, so as to be connected to the first protective plate 26 through the first side plate connecting portion 52. The second top plate connector includes a second top plate connecting portion and a second side plate connecting portion connected to each other. The plane of the second top plate connector is perpendicular to the plane of the second side plate connecting portion, so that the second top plate connecting portion and the second side plate connecting portion are L-shaped connecting plates, so as to be connected to the second protective plate through the second side plate connecting portion. The first top plate connecting part 51 is provided with a plurality of first connecting posts 53, the second top plate connecting part is provided with a plurality of second connecting posts, and the protective top plate 3 is provided with a plurality of mounting holes 33, so that the plurality of first connecting posts 53 are inserted one-to-one into the plurality of mounting holes 33 near the first protective plate 26, so that the first protective plate 26 is connected to the protective top plate 3; and the plurality of second connecting posts are inserted one-to-one into the plurality of mounting holes 33 near the second protective plate, so that the second protective plate is connected to the protective top plate 3.

[0047] In addition, to facilitate the installation of the grounding structure, the grounding structure also includes two mounting brackets 6. The two mounting brackets 6 are respectively connected to the bus body 11 by two fixing bolts 7. The two mounting brackets 6 are respectively set at both ends of the bus body 11 to support the grounding bus 1.

[0048] One of the two fixing bolts 7 is located on the end of the first connector 21 on the busbar body 11 away from the second connector 22, so as to limit the first connector 21; the other fixing bolt 7 is located on the end of the second connector 22 on the busbar body 11 away from the first connector 21, so as to limit the second connector 22.

[0049] The present invention also provides a switch cabinet, which includes the above-described grounding structure, wherein the conductive component 13 of the grounding structure is used to connect to the conductive line of the switch cabinet.

[0050] In the specific implementation process, firstly, the first connecting piece 21 and the second connecting piece 22 are moved to the position with the largest spacing. The grounding wire is passed through the first wire hole 41 and connected to the grounding piece 12. The conductive wire of the electrical equipment is passed through the second wire hole and connected to the grounding piece 13. Then, the first partition plate 23, the second partition plate 24 and the third partition plate 25 are connected to the first connecting piece 21 and the second connecting piece 22 respectively. Next, the first connecting piece 21 and the second connecting piece 22 are moved to a suitable position, and the protective top plate 3 is connected to both the first partition plate 23 and the second partition plate 24. Finally, after the first wire plate 4 is connected to the first protective plate 26, the first protective plate 26 is connected to the protective top plate 3 through the first top plate connecting piece 5. After the second wire plate is connected to the second protective plate, the second protective plate is connected to the protective top plate 3 through the second top plate connecting piece.

[0051] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0052] This invention provides a grounding structure, which includes a grounding busbar 1 and a protective component 2. The grounding busbar 1 includes a busbar body 11, a grounding component 12, and a conductive component 13, which are spaced apart on the busbar body 11. The protective component 2 has a protective space and is an insulating component. The protective component 2 covers the grounding busbar 1. The length of the busbar body 11 is L1, 70mm≤L1≤150mm. The width of the busbar body 11 is L2, 50mm≤L2≤70mm. By providing a grounding component 12 for connection to the grounding conductor and a conductive component 13 for connection to the conductive wire of electrical equipment, and by placing the grounding component 12 and conductive component 13 within a protective space to protect them, the stability of the grounding structure in harsh environments is improved. Furthermore, by increasing the length of the busbar body 11 from the original 40mm to a minimum of 70mm, sufficient exposed space for grounding is ensured, and the extended length ensures that the safety distance between the grounding component 12 and the conductive component 13 meets relevant regulations. This solves the problem of inconvenient grounding operations in existing switchgear. It greatly facilitates grounding operations for operators, improving the efficiency and safety of installation and subsequent maintenance.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A grounding structure, characterized by, The ground bus (1) comprises a bus body (11), a grounding member (12) and a conductive member (13), the grounding member (12) and the conductive member (13) are arranged on the bus body (11) in a spaced manner; the grounding member (12) is used for connecting with a grounding wire; the conductive member (13) is used for connecting with a conductive wire of an electrical device; The protection assembly (2) has a protection space, the protection assembly (2) is an insulating member; the protection assembly (2) is arranged on the ground bus (1) to make the grounding member (12) and the conductive member (13) arranged in the protection space to protect the grounding member (12) and the conductive member (13); The length of the bus body (11) is L1, and 70mm≤L1≤150mm; the width of the bus body (11) is L2, and 50mm≤L2≤70mm; The protection assembly (2) comprises a first connecting member (21), a second connecting member (22), a first partition plate (23) and a second partition plate (24), the first partition plate (23) has a first plug-in part (231), the first connecting member (21) has a second plug-in part (211), the first partition plate (23) and the first connecting member (21) are connected by plugging the first plug-in part (231) with the second plug-in part (211); The second partition plate (24) has a third plug-in part (241), and the second connecting member (22) has a fourth plug-in part (221), the second partition plate (24) and the second connecting member (22) are connected by plugging the third plug-in part (241) with the fourth plug-in part (221).

2. The grounding structure according to claim 1, wherein the length L1 is 70mm; and / or the width L2 is 50mm.

3. The grounding structure according to claim 1, wherein the grounding member (12) and the conductive member (13) are arranged in a spaced manner along the width direction of the bus body (11); the distance between the grounding member (12) and the conductive member (13) is L3, and L3≥30mm; and / or the grounding member (12) is a bolt; the conductive member (13) is a bolt; and / or the protection assembly (2) is made of acrylic material.

4. The grounding structure according to claim 1, wherein the first connecting member (21) and the second connecting member (22) are arranged in a spaced manner along the length direction of the bus body (11); the grounding member (12) and the conductive member (13) are arranged between the first connecting member (21) and the second connecting member (22); wherein the first connecting member (21) and the second connecting member (22) are movably arranged in a direction close to or away from each other. The protection assembly (2) further comprises: ​ ​ ​ ​ ​ ​ ​ 5. The grounding structure of claim 4, wherein, ​ The protective top plate (3) has a first mounting portion (31) and a second mounting portion (32), which are arranged at intervals along the length direction of the protective top plate (3) and are connected with the first connecting piece (21) and the second connecting piece (22) one by one through the first mounting portion (31) and the second mounting portion (32) respectively. The length of the protective top plate (3) is L4, and L4>L1; the width of the protective top plate (3) is L5, and L5>L2.

6. The grounding structure of claim 4, wherein, The grounding piece (12) and the electrically conductive piece (13) are arranged at intervals along the width direction of the busbar body (11); the protective assembly (2) further comprises: A third partition plate (25) is arranged between the grounding piece (12) and the electrically conductive piece (13) to separate the grounding piece (12) from the electrically conductive piece (13); two ends of the third partition plate (25) are connected with the first connecting piece (21) and the second connecting piece (22) respectively; A first threading plate (4) is arranged on the side of the busbar body (11) close to the grounding piece (12), and a first threading hole (41) is arranged on the first threading plate (4) to enable the grounding wire to pass through the first threading hole (41) and be connected with the grounding piece (12); A second threading plate is arranged on the side of the busbar body (11) close to the electrically conductive piece (13), and a second threading hole is arranged on the second threading plate to enable the electrically conductive wire of the electrical equipment to pass through the second threading hole and be connected with the electrically conductive piece (13).

7. The grounding structure of claim 6, wherein, The protective assembly (2) further comprises: A first protective plate (26), the first threading plate (4) is detachably arranged on the first protective plate (26); the first protective plate (26) is connected with the protective top plate (3) of the protective assembly (2) through a first top plate connecting piece, so as to protect the grounding piece (12) through the first protective plate (26); A second protective plate is arranged opposite to the first protective plate (26), and the second threading plate is detachably arranged on the second protective plate; the second protective plate is connected with the protective top plate (3) through a second top plate connecting piece, so as to protect the electrically conductive piece (13) through the second protective plate; The first protective plate (26), the second protective plate, the protective top plate (3), the first partition plate (23) of the protective assembly (2), and the second partition plate (24) of the protective assembly (2) form the protective space therebetween to cover the grounding busbar (1).

8. The grounding structure of claim 1, wherein, The grounding structure further comprises: Two mounting racks (6) are connected with the busbar body (11) through two fixing bolts (7) respectively, and the two mounting racks (6) are arranged at two ends of the busbar body (11) respectively to support the grounding busbar (1) through the two mounting racks (6).

9. Switchgear cabinet, characterized in that comprising the earthing structure according to any one of claims 1 to 8, the electrically conductive connection (13) of the earthing structure being configured to be connected to an electrically conductive line of the switchgear.

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