Switch cabinet

Abstract

The utility model belongs to the technical field of switch equipment, and discloses a switch cabinet, which comprises a circuit breaker chamber, a bus chamber, a cable chamber and a bus lifting chamber, and is characterized in that the circuit breaker chamber, the bus chamber and the cable chamber are all positioned on the right side of the bus lifting chamber; the circuit breaker chamber and the bus chamber are both located above the cable chamber, and the circuit breaker chamber is located on the front side of the bus chamber; an upper wall bushing is arranged on the side wall, close to the bus chamber, of the bus lifting chamber, a lower wall bushing corresponding to the upper wall bushing is arranged at the bottom of the side wall, close to the outside, of the bus lifting chamber, a contact busbar is arranged in the bus lifting chamber, one end of the contact busbar penetrates through the upper wall bushing and extends into the bus chamber, and the other end of the contact busbar penetrates through the lower wall bushing. And the other end of the connecting rod penetrates through the lower wall bushing and extends to the outside. According to the switch cabinet, the bus is lifted through the bus lifting chamber, and the bus lifting cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and in particular to a switch cabinet. Background Technology

[0002] Switchgear is a type of power distribution equipment used in power transmission and transformation systems, responsible for the transmission, distribution, and control of electrical energy. Switchgear typically houses various electrical components; the effective and rational arrangement of these components not only affects the safety of the switching equipment but also its service life and the ease of future maintenance.

[0003] In traditional switchgear, the busbar compartment is typically located at the upper rear of the cabinet. This design requires external busbars to be connected to the busbar compartment from above. For applications where the external busbars are located at a lower position, an additional cabinet is usually needed to lift the busbars from their lower position to a higher position before connecting them to the busbars inside the compartment. This results in higher costs for busbar lifting and more inconvenient assembly.

[0004] Therefore, there is an urgent need to propose a switch cabinet to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a switch cabinet with an independent busbar lifting chamber inside, which realizes the lifting of the busbar without changing other layouts inside the cabinet, reducing the lifting cost of the busbar and the difficulty of connecting the external busbar with the internal busbar of the switch cabinet.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The switchgear includes a circuit breaker compartment, a busbar compartment, a cable compartment, and a busbar lifting compartment, wherein the circuit breaker compartment, the busbar compartment, and the cable compartment are all located on the right side of the busbar lifting compartment;

[0008] Both the circuit breaker compartment and the busbar compartment are located above the cable compartment, with the circuit breaker compartment located in front of the busbar compartment.

[0009] The busbar lifting chamber has an upper through-wall sleeve on its side wall near the busbar chamber, and a lower through-wall sleeve corresponding to the upper through-wall sleeve is provided at the bottom of the side wall near the outside of the busbar lifting chamber. A connecting busbar is provided in the busbar lifting chamber, with one end of the connecting busbar passing through the upper through-wall sleeve and extending into the busbar chamber, and the other end passing through the lower through-wall sleeve and extending to the outside.

[0010] Optionally, the busbar lifting room includes a separate first compartment and a second compartment. The second compartment is located behind the first compartment and opposite to the busbar room. The second compartment is provided with the upper through-wall sleeve, the lower through-wall sleeve and the connecting busbar.

[0011] Optionally, the connecting busbar is fixed to the side wall of the busbar lifting chamber by insulators;

[0012] And / or, multiple upper wall bushings are provided, and the lower wall bushings are provided in a one-to-one correspondence with the upper wall bushings. Each pair of corresponding upper and lower wall bushings is provided with a connecting busbar. The multiple upper wall bushings are arranged in a straight line or in a triangular arrangement. And / or, the multiple lower wall bushings are arranged in a straight line or in a triangular arrangement.

[0013] Optionally, an instrument room is provided above the circuit breaker compartment and the busbar lifting compartment, and a small busbar compartment is provided above the instrument room, with cables in the instrument room extending into the small busbar compartment.

[0014] Optionally, the switch cabinet is provided with a secondary cable channel that extends along the height of the switch cabinet. One end of the secondary cable channel is connected to the instrument room, and the other end is located on the bottom plate of the switch cabinet.

[0015] Optionally, the front side of the small busbar compartment is provided with an eyebrow, which is used to identify product information.

[0016] Optionally, the circuit breaker compartment is equipped with a handcart and a valve mechanism; the busbar compartment is equipped with a first contact box and a first branch, the first contact box being disposed opposite to the upper contact arm of the handcart, the first branch being disposed corresponding to the tie busbar, one end of the first branch being electrically connected to the tie busbar, and the other end being electrically connected to the first contact box; the cable compartment is equipped with an interlocking mechanism, a grounding switch connected to the interlocking mechanism, a surge arrester, a second contact box, a current transformer, and a second branch, the second contact box being disposed opposite to the lower contact arm of the handcart, the current transformer being disposed opposite to the second contact box and located behind the second contact box, one end of the second branch being electrically connected to the current transformer, and the other end being electrically connected to the grounding switch.

[0017] Optionally, the cable compartment includes a first compartment and a second compartment. The first compartment is located below the circuit breaker compartment, and the second compartment is located below the busbar compartment. The grounding switch, the surge arrester, the second contact box, the current transformer, and the second branch are arranged in the second compartment. The main body of the interlocking mechanism is arranged in the first compartment, and the interlocking rod of the interlocking mechanism extends into the second compartment and is connected to the grounding switch.

[0018] Optionally, the bottom plate of the switch cabinet is provided with a primary cable channel connecting the outside world and the cable compartment.

[0019] Optionally, the circuit breaker compartment is provided with a circuit breaker compartment pressure relief channel, and the top of the switchgear is provided with a first pressure relief port communicating with the circuit breaker compartment pressure relief channel; the busbar compartment is provided with a busbar compartment pressure relief channel, and the top of the switchgear is provided with a second pressure relief port communicating with the busbar compartment pressure relief channel; the rear side of the busbar compartment is provided with a cable compartment pressure relief channel communicating with the cable compartment, and the top of the switchgear is provided with a third pressure relief port communicating with the cable compartment pressure relief channel.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a switch cabinet, including a circuit breaker compartment, a busbar compartment, a cable compartment, and a busbar lifting compartment. The circuit breaker compartment, busbar compartment, and cable compartment are located to the right of the busbar lifting compartment. An upper through-wall bushing is provided on the side wall of the busbar lifting compartment near the busbar compartment, and a lower through-wall bushing corresponding to the upper through-wall bushing is provided at the bottom of the side wall of the busbar lifting compartment near the outside. One end of a connecting busbar passes through the upper through-wall bushing and extends into the busbar compartment, and the other end passes through the lower through-wall bushing and extends to the outside. That is, the busbar lifting compartment allows external busbars located at a lower position to be lifted to a higher position and connected to the busbars inside the busbar compartment, achieving busbar connection. Compared with the existing technology that requires additional cabinets for busbar lifting, the cost of busbar lifting is lower, and assembly only requires connecting the external busbars to the connecting busbars extending from the bottom of the busbar lifting compartment, greatly reducing assembly difficulty. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the switch cabinet provided in an embodiment of the present utility model;

[0024] Figure 2 This is an internal schematic diagram of the busbar lifting chamber provided in an embodiment of this utility model;

[0025] Figure 3 This is an internal schematic diagram of the circuit breaker compartment, busbar compartment, and cable compartment provided in this embodiment of the utility model;

[0026] Figure 4 This is a circuit diagram of the switchgear provided in this embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the base plate provided in an embodiment of the present utility model;

[0028] Figure 6 This is a front view of the switch cabinet provided in this embodiment of the utility model;

[0029] Figure 7 This is a rear view of the switch cabinet provided in this embodiment of the utility model.

[0030] In the picture:

[0031] 100. Circuit breaker compartment; 110. Handcart; 120. Valve mechanism;

[0032] 200. Busbar compartment; 210. First contact box; 220. First branch busbar;

[0033] 300. Cable compartment; 310. First compartment; 311. Interlocking mechanism; 320. Second compartment; 321. Grounding switch; 322. Surge arrester; 323. Second contact box; 324. Current transformer; 325. Second branch;

[0034] 400. Busbar lifting compartment; 410. First compartment; 420. Second compartment; 421. Upper through-wall bushing; 422. Lower through-wall bushing; 423. Connecting busbar; 424. Insulator;

[0035] 500. Instrument Room;

[0036] 600. Small busbar chamber; 610. Eyebrow;

[0037] 710. First front upper door; 720. Second front upper door; 721. First observation window; 722. Circuit breaker operating port; 730. First front lower door; 740. Second front lower door; 741. Second observation window; 750. First rear upper door; 760. Second rear upper door; 770. First rear lower door; 780. Second rear lower door; 781. Third observation window;

[0038] 800. Base plate; 810. Primary cable channel;

[0039] 900. Secondary cable channel;

[0040] 1000, First pressure relief port; 1100, Second pressure relief port; 1200, Third pressure relief port. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] This embodiment provides a switch cabinet with an independent busbar lifting chamber inside. The busbar can be lifted without changing other layouts inside the cabinet, which reduces the lifting cost of the busbar and the difficulty of connecting the external busbar to the internal busbar of the switch cabinet.

[0046] like Figures 1-3As shown, the switchgear includes a circuit breaker compartment 100, a busbar compartment 200, a cable compartment 300, and a busbar lifting compartment 400. The circuit breaker compartment 100, busbar compartment 200, and cable compartment 300 are all located to the right of the busbar lifting compartment 400.

[0047] Specifically, see [link to relevant documentation] Figure 1 The circuit breaker compartment 100 and the busbar compartment 200 are both located above the cable compartment 300, with the circuit breaker compartment 100 located in front of the busbar compartment.

[0048] And, as Figure 2 and Figure 3 As shown, the busbar lifting chamber 400 has an upper through-wall sleeve 421 on its side wall near the busbar chamber 200, and a lower through-wall sleeve 422 corresponding to the upper through-wall sleeve 421 is located at the bottom of the side wall near the outside of the busbar lifting chamber 400. A connecting busbar 423 is located inside the busbar lifting chamber 400. One end of the connecting busbar 423 passes through the upper through-wall sleeve 421 and extends into the busbar chamber 200, while the other end passes through the lower through-wall sleeve 422 and extends to the outside. That is, the connecting busbar 423 in the busbar lifting chamber 400 can lift the external busbar located at a lower position to a higher position and connect it with the busbar inside the busbar chamber 200, thus achieving busbar communication. Compared with the existing technology that requires additional cabinets for busbar lifting, the cost of busbar lifting is lower. Furthermore, during assembly, it is only necessary to connect the external busbar to the connecting busbar 423 extending from the bottom of the busbar lifting chamber 400, greatly reducing the assembly difficulty.

[0049] It is understandable that the busbar can be lifted through the busbar lifting compartment 400 without changing the layout of the circuit breaker compartment 100, busbar compartment 200 and cable compartment 300 inside the switch cabinet.

[0050] Figure 4 The circuit diagram of the switchgear provided in this embodiment shows that the leftmost busbar is lifted via the busbar lifting chamber 400. The switchgear provided in this embodiment is suitable for switchgear structures where the circuit breaker chamber 100 and the busbar chamber 200 are located at the top.

[0051] Optionally, see [link to relevant documentation] Figure 2 Multiple upper wall bushings 421 can be installed, and lower wall bushings 422 are installed in a one-to-one correspondence with the upper wall bushings 421, that is, the number of lower wall bushings 422 is the same as the number of upper wall bushings 421. Each pair of corresponding upper wall bushings 421 and lower wall bushings 422 is provided with a connecting busbar 423. Optionally, the multiple upper wall bushings 421 can be arranged in a straight line or in a triangular pattern. Similarly, the multiple lower wall bushings 422 can also be arranged in a straight line or in a triangular pattern.

[0052] In this embodiment, there are three connecting busbars 423, corresponding to phases A, B and C respectively. Therefore, there are also three upper wall bushings 421 and three lower wall bushings 422.

[0053] Optionally, see [link to relevant documentation] Figure 2 The connecting busbar 423 can be installed on the side wall of the busbar lifting chamber 400 through the insulator 424. In this way, the connecting busbar 423 can be fixed and the insulation can be guaranteed.

[0054] Optionally, multiple connecting busbars 423 are arranged at intervals along the switch cabinet from front to back.

[0055] Further, see also Figure 3 The busbar lifting room 400 includes a separate first compartment 410 and a second compartment 420. The second compartment 420 is located behind the first compartment 410 and opposite the busbar room 200. The second compartment 420 contains an upper through-wall bushing 421, a lower through-wall bushing 422, and a connecting busbar 423. Dividing the busbar lifting room 400 into separate first and second compartments allows the first compartment 410 to be used as a spare room to house other components, improving the space utilization of the busbar lifting room 400. Placing the upper through-wall bushing 421, lower through-wall bushing 422, and connecting busbar 423 within the second compartment 420 opposite the busbar room 200 helps to shorten the service length of the connecting busbar 423.

[0056] Further, see also Figures 1-3 The switchgear also includes an instrument room 500 and a small busbar room 600. Specifically, the instrument room 500 is located above the circuit breaker room 100 and the busbar lifting room 400, and the small busbar room 600 is located above the instrument room 500. The cables in the instrument room 500 extend into the small busbar room 600. The instrument room 500 is mainly for indicating, observing, and controlling.

[0057] Optionally, see [link to relevant documentation] Figure 2 and Figure 3 The front of the small busbar compartment 600 is provided with a header 610, which is used to identify product information. The product information may include the model of the switchgear, the purpose of the switchgear, etc.

[0058] Furthermore, such as Figure 5 As shown, the switchgear includes a secondary cable channel 900, which extends along the height of the switchgear. One end of the secondary cable channel 900 connects to the instrument compartment 500, while the other end is located on the base plate 800 of the switchgear. This configuration is suitable for scenarios where the switchgear is placed on a foundation, and cables are introduced into the switchgear from the bottom. The separate secondary cable channel 900 facilitates cable arrangement and insulation.

[0059] Optionally, see [link to relevant documentation] Figure 5 In this embodiment, secondary cable channels 900 are provided on both sides of the busbar lifting chamber 400, as well as on both sides of the circuit breaker chamber 100 and the cable chamber 300.

[0060] Optionally, multiple secondary cable channels 900 can be provided to achieve electrical isolation between different cables.

[0061] Further, see also Figure 3 In this embodiment, the circuit breaker compartment 100 is equipped with a handcart 110 and a valve mechanism 120. The busbar compartment 200 is equipped with a first contact box 210 and a first branch 220. The first contact box 210 is arranged opposite to the upper contact arm of the handcart 110, and the first branch 220 is arranged corresponding to the connecting busbar 423. One end of the first branch 220 is electrically connected to the connecting busbar 423, and the other end is electrically connected to the first contact box 210. The cable compartment 300 is equipped with an interlocking mechanism 311, a grounding switch 321 connected to the interlocking mechanism 311, a surge arrester 322, a second contact box 323, a current transformer 324, and a second branch 325. The second contact box 323 is positioned opposite the lower contact arm of the handcart 110. The current transformer 324 is positioned opposite the second contact box 323 and located behind it. One end of the second branch 325 is electrically connected to the current transformer 324, and the other end is electrically connected to the grounding switch 321. This arrangement results in a compact structure, which helps to improve the space utilization of the switchgear.

[0062] Optionally, see [link to relevant documentation] Figure 3 The cable compartment 300 includes a first compartment 310 and a second compartment 320. The first compartment 310 is located below the circuit breaker compartment 100, and the second compartment 320 is located below the busbar compartment 200. The grounding switch 321, surge arrester 322, second contact box 323, current transformer 324, and second branch 325 are disposed in the second compartment 320. The main body of the interlocking mechanism 311 is arranged in the first compartment 310, and the interlocking rod of the interlocking mechanism 311 extends into the second compartment 320 and connects to the grounding switch 321. By arranging the grounding switch 321, surge arrester 322, second contact box 323, and current transformer 324 in the second compartment 320 below the busbar compartment 200, the switchgear structure becomes more compact.

[0063] Optionally, see [link to relevant documentation] Figure 5 A primary cable channel 810 is provided on the base plate 800 of the switchgear, connecting the outside world and the cable compartment 300. Specifically, in this embodiment, the primary cable channel 810 connects the outside world and the second compartment 320. This configuration is suitable for scenarios where the switchgear is placed on a foundation and the cables are introduced into the switchgear from the bottom.

[0064] Furthermore, the primary cable channel 810 can be configured with one, two, three, etc., depending on actual needs.

[0065] Further, see also Figure 3 The circuit breaker compartment 100 is equipped with a pressure relief channel, and the top of the switchgear is equipped with a first pressure relief port 1000 that communicates with the pressure relief channel. Placing the first pressure relief port 1000 on the top of the switchgear facilitates the smooth discharge of gas and provides a better pressure relief effect on the circuit breaker compartment 100.

[0066] Further, see also Figure 3 The busbar compartment 200 is equipped with a busbar compartment pressure relief channel, and the top of the switchgear is equipped with a second pressure relief port 1100 that communicates with the busbar compartment pressure relief channel. Placing the second pressure relief port 1100 on the top of the switchgear facilitates the smooth discharge of gas and provides a better pressure relief effect for the busbar compartment 200.

[0067] Further, see also Figure 3 The busbar compartment 200 has a cable compartment pressure relief channel connected to the cable compartment 300 at its rear side, and the top of the switchgear has a third pressure relief port 1200 connected to the cable compartment pressure relief channel. Placing the third pressure relief port 1200 at the top of the switchgear facilitates the smooth discharge of gas and provides a better pressure relief effect for the cable compartment 300.

[0068] Furthermore, such as Figure 6 As shown, the front of the switchgear is provided with a first front upper door 710, a second front upper door 720, a first front lower door 730, and a second front lower door 740. The first front upper door 710 and the second front upper door 720 are arranged along the left-right direction of the switchgear. The first front lower door 730 is located below the first front upper door 710, and the second front lower door 740 is located below the second front upper door 720. The first front upper door 710 and the first front lower door 730 correspond to the busbar lifting compartment 400. Optionally, in this embodiment, the first front upper door 710 and the first front lower door 730 correspond to the first compartment 410. The second front upper door 720 corresponds to the circuit breaker compartment 100, and the second front lower door 740 corresponds to the cable compartment 300. The second front upper door 720 is provided with a first observation window 721 and a circuit breaker operating port 722. The second front lower door 740 is provided with a second observation window 741.

[0069] Furthermore, such as Figure 7As shown, the rear of the switchgear is provided with a first upper rear door 750, a second upper rear door 760, a first lower rear door 770, and a second lower rear door 780. The first upper rear door 750 and the second upper rear door 760 are arranged along the left-right direction of the switchgear. The first lower rear door 770 is located below the first upper rear door 750, and the second lower rear door 780 is located below the second upper rear door 760. The first upper rear door 750 and the first lower rear door 770 correspond to the busbar lifting chamber 400. Optionally, in this embodiment, the first upper rear door 750 and the first lower rear door 770 correspond to the second compartment 420. The second upper rear door 760 corresponds to the busbar compartment 200, and the second lower rear door 780 corresponds to the cable compartment 300. The second lower rear door 780 is provided with a third observation window 781.

[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A switch cabinet, characterized in that, It includes a circuit breaker chamber (100), a bus chamber (200), a cable chamber (300) and a busbar lifting chamber (400). The circuit breaker chamber (100), the bus chamber (200) and the cable chamber (300) are all located on the right side of the busbar lifting chamber (400). The circuit breaker chamber (100) and the bus chamber (200) are both located above the cable chamber (300), and the circuit breaker chamber (100) is located on the front side of the bus chamber (200). On the side wall of the busbar lifting chamber (400) close to the bus chamber (200), there is an upper through-wall bushing (421). At the bottom of the side wall of the busbar lifting chamber (400) close to the outside, there is a lower through-wall bushing (422) corresponding to the upper through-wall bushing (421). Inside the busbar lifting chamber (400), there is a tie busbar (423). One end of the tie busbar (423) passes through the upper through-wall bushing (421) and extends into the bus chamber (200), and the other end passes through the lower through-wall bushing (422) and extends to the outside.

2. The switchgear according to claim 1, characterized in that, The busbar lifting chamber (400) includes an independent first compartment (410) and a second compartment (420). The second compartment (420) is located on the rear side of the first compartment (410) and faces the bus chamber (200). Inside the second compartment (420), there are the upper through-wall bushing (421), the lower through-wall bushing (422) and the tie busbar (423).

3. The switchgear according to claim 1, characterized in that, The tie busbar (423) is fixed to the side wall of the busbar lifting chamber (400) through an insulator (424). And / or, there are multiple upper through-wall bushings (421). The lower through-wall bushings (422) are arranged in one-to-one correspondence with the upper through-wall bushings (421). For each pair of corresponding upper through-wall bushing (421) and lower through-wall bushing (422), one tie busbar (423) is provided; the multiple upper through-wall bushings (421) are arranged in a "one" shape or a "pin" shape; and / or, the multiple lower through-wall bushings (422) are arranged in a "one" shape or a "pin" shape.

4. The switchgear according to claim 1, characterized in that, Above the circuit breaker chamber (100) and the busbar lifting chamber (400), there is an instrument chamber (500). Above the instrument chamber (500), there is a small busbar chamber (600). The cables in the instrument chamber (500) extend into the small busbar chamber (600).

5. The switchgear according to claim 4, characterized in that, Inside the switchgear, there is a secondary cable channel (900). The secondary cable channel (900) extends along the height direction of the switchgear. One end opening of the secondary cable channel (900) is communicated with the instrument chamber (500), and the other end opening is located on the bottom plate (800) of the switchgear.

6. The switchgear according to claim 4, characterized in that, In front of the small busbar chamber (600), there is a nameplate (610) which is used to identify product information.

7. The switchgear according to claim 1, wherein Inside the circuit breaker chamber (100), there is a trolley (110) and a shutter mechanism (120). The busbar compartment (200) is provided with a first contact box (210) and a first branch (220). The first contact box (210) is disposed opposite to the upper contact arm of the handcart (110). The first branch (220) is disposed corresponding to the connecting busbar (423). One end of the first branch (220) is electrically connected to the connecting busbar (423), and the other end is electrically connected to the first contact box (210). The cable compartment (300) is equipped with an interlocking mechanism (311), a grounding switch (321) connected to the interlocking mechanism (311), a surge arrester (322), a second contact box (323), a current transformer (324), and a second branch (325). The second contact box (323) is arranged opposite to the lower contact arm of the handcart (110). The current transformer (324) is arranged opposite to the second contact box (323) and located on the rear side of the second contact box (323). One end of the second branch (325) is electrically connected to the current transformer (324), and the other end is electrically connected to the grounding switch (321).

8. The switch cabinet according to claim 7, characterized in that, The cable compartment (300) includes a first compartment (310) and a second compartment (320). The first compartment (310) is located below the circuit breaker compartment (100), and the second compartment (320) is located below the busbar compartment (200). The grounding switch (321), the surge arrester (322), the second contact box (323), the current transformer (324), and the second branch (325) are arranged in the second compartment (320). The main body of the interlocking mechanism (311) is arranged in the first compartment (310), and the interlocking rod of the interlocking mechanism (311) extends into the second compartment (320) and is connected to the grounding switch (321).

9. The switchgear according to claim 1, characterized in that, The base plate (800) of the switch cabinet is provided with a primary cable channel (810) that connects to the outside and the cable compartment (300).

10. The switchgear according to any one of claims 1-9, characterized in that, The circuit breaker compartment (100) is provided with a circuit breaker compartment pressure relief channel, and the top of the switch cabinet is provided with a first pressure relief port (1000) that communicates with the circuit breaker compartment pressure relief channel; The busbar compartment (200) is provided with a busbar compartment pressure relief channel, and the top of the switch cabinet is provided with a second pressure relief port (1100) that communicates with the busbar compartment pressure relief channel; The busbar compartment (200) is provided with a cable compartment pressure relief channel communicating with the cable compartment (300) on the rear side, and the top of the switch cabinet is provided with a third pressure relief port (1200) communicating with the cable compartment pressure relief channel.

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