Cable chamber of air-insulated switch cabinet and air-insulated switch cabinet

Abstract

The utility model relates to the field of electrical connection, and provides a cable chamber of an air-insulated switch cabinet and the air-insulated switch cabinet. The cable chamber of the air insulation switch cabinet comprises a cable shell, a containing space is formed in the cable shell, a switch cabinet copper bar and a cable assembly are arranged in the containing space, the switch cabinet copper bar is connected to the interior of the switch cabinet, and the cable assembly is connected to the exterior of the switch cabinet. And the switch cabinet copper bar is connected with the cable assembly through a flexible connecting piece. According to the utility model, the connection between the switch cabinet copper bar and the cable assembly is realized by using the flexible connecting piece so as to adapt to any potential movement of the cable, thereby protecting the integrity of electrical connection and the stability of the system.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connection, in particular to a cable room of an air-insulated switch cabinet and the air-insulated switch cabinet. Background Art

[0002] In wind turbine booster stations, 35kV power distribution equipment typically uses air-insulated switchgear, which is connected to 35kV collector lines, reactive power compensation, and other facilities via cables. The switchgear has a cable compartment inside, where the cable terminals connect directly to the copper busbars inside the switchgear.

[0003] In existing switchgear, collector lines are typically laid underground on soft soil. Over time, the soil can settle, causing cable displacement. This causes the cables to pull downward on the copper busbars in the switchgear, affecting the proper functioning of the connections. Furthermore, due to poor quality cable terminations, failures can occur after a period of operation, necessitating replacement of the terminations. However, the existing structure does not allow for direct cable connection to the switchgear busbars, increasing maintenance difficulties. Utility Model Content

[0004] The utility model provides a cable room of an air-insulated switchgear and an air-insulated switchgear, which are used to solve the defects in the prior art and achieve the following technical effects: a soft connector is used to realize the connection between the switchgear copper bus and the cable assembly to adapt to any potential movement of the cable, thereby protecting the integrity of the electrical connection and the stability of the system.

[0005] The cable compartment of the air-insulated switchgear according to the embodiment of the first aspect of the present utility model comprises:

[0006] The cable housing has an accommodating space formed inside, in which a switch cabinet copper busbar and a cable assembly are arranged. The switch cabinet copper busbar is connected to the inside of the switch cabinet, and the cable assembly is connected to the outside of the switch cabinet. The switch cabinet copper busbar and the cable assembly are connected by a soft connector.

[0007] According to one embodiment of the present invention, the flexible connector is sequentially formed with a first connecting portion, a bending portion and a second connecting portion along its length direction, the first connecting portion is fixed to the switch cabinet copper busbar, and the second connecting portion is fixed to the cable assembly.

[0008] According to one embodiment of the present invention, one side of the first connecting portion forms a first mounting surface for fixing to the copper busbar of the switch cabinet, and one side of the second connecting portion forms a second mounting surface for fixing to the cable assembly, and the first mounting surface and the second mounting surface are both located on the same side of the soft connector.

[0009] According to an embodiment of the present invention, the bent portion bends in a direction away from the first mounting surface and the second mounting surface.

[0010] According to an embodiment of the present invention, the bent portion is arranged adjacent to the second mounting surface.

[0011] According to an embodiment of the present invention, the first connecting portion is parallel to the second connecting portion, and both the first connecting portion and the second connecting portion are in a straight plate shape.

[0012] According to one embodiment of the present invention, the flexible connectors are all made of copper; or, in the flexible connector, the bent portion and the second connecting portion are both made of aluminum, the free end of the first connecting portion is made of copper and the connection between the first connecting portion and the bent portion is made of aluminum.

[0013] According to one embodiment of the present invention, the cable assembly includes a cable terminal, a cable fixing clamp and a terminal connection terminal;

[0014] The cable fixing clamp is fixed on the inner wall of the cable chamber, and the cable terminal passes through and is fixed in the cable fixing clamp, the end of the cable terminal is connected to the terminal wiring terminal, and the second connecting portion is fixed to the terminal wiring terminal.

[0015] According to one embodiment of the present invention, an SF6 collector is further provided in the accommodating space.

[0016] An air-insulated switchgear according to an embodiment of the second aspect of the present invention includes:

[0017] A cable room of an air-insulated switchgear as described in the embodiment of the first aspect of the utility model.

[0018] The utility model provides a cable room of an air-insulated switch cabinet. The cable room utilizes soft connectors to realize the connection between the switch cabinet copper bus and the cable assembly to adapt to any potential movement of the cable, thereby protecting the integrity of the electrical connection and the stability of the system.

[0019] Furthermore, the cable chamber of the present invention has the following advantages compared with the related art.

[0020] (1) Increased flexibility: By using soft connectors to connect the switch cabinet copper busbar and cable assembly, the cable compartment design allows a certain degree of displacement, solving the copper busbar stress problem caused by cable displacement. This design allows the cable terminal to move within a certain range without affecting the stability of its connection with the copper busbar.

[0021] (2) Enhanced adaptability: The flexible connector can adapt to cables of different materials, and can connect well with both copper core and aluminum alloy cables. This means that the cable compartment can flexibly adapt to different types of cables, enhancing its application range and compatibility.

[0022] (3) Easy maintenance: When the cable terminal needs to be replaced or repaired, it can be achieved by replacing the soft connector without having to re-lay the cable. This simplifies the maintenance process and reduces maintenance costs and time consumption.

[0023] (4) Structural optimization: The design of the internal structure of the cable housing takes into account the requirements of electrical safety distance. At the same time, through reasonable layout, the space inside the cable room is more efficiently utilized. This helps to reduce the overall size of the switch cabinet and save space resources.

[0024] (5) Improved safety performance: The connection method using soft connectors can effectively reduce the failure rate caused by improper cable terminal manufacturing or cable displacement, thereby improving the overall operational safety and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the cable chamber provided by the utility model.

[0027] Figure 2 It is a structural schematic diagram of the terminal wiring terminal provided by the utility model.

[0028] Figure 3 It is a structural schematic diagram of a flexible connector provided by an embodiment of the present utility model.

[0029] Figure 4 It is a structural schematic diagram of a flexible connector provided by another embodiment of the present invention.

[0030] Reference numerals:

[0031] 1. Cable terminal; 2. Cable fixing clamp; 3. Terminal terminal; 4. Flexible connector; 41. First connection part; 42. Bend part; 43. Second connection part; 5. Switch cabinet copper busbar; 6. SF6 collector. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] The cable compartment of an air-insulated switchgear cabinet and the air-insulated switchgear cabinet having the cable compartment provided by the present invention will be described below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the cable room of the air-insulated switchgear according to the embodiment of the first aspect of the utility model includes a cable housing.

[0038] A accommodating space is formed inside the cable housing, in which a switch cabinet copper busbar 5 and a cable assembly are arranged. The switch cabinet copper busbar 5 is connected to the inside of the switch cabinet, and the cable assembly is connected to the outside of the switch cabinet. The switch cabinet copper busbar 5 and the cable assembly are connected via a soft connector 4.

[0039] For the cable room proposed in the present invention, its internal structure is introduced as follows: the cable housing is usually a metal shell, which provides physical protection for the cable room, prevents the external environment from damaging the electrical components, and ensures the safety of the operator. The space inside the cable housing is used to place and protect electrical connection components, such as the switch cabinet copper busbar 5 and the cable terminal 1, etc. It is necessary to ensure sufficient space to accommodate these components and meet the requirements of electrical safety distance. The switch cabinet copper busbar 5 is an important component of the power transmission inside the switch cabinet. It is responsible for controlling the transmission of power between the cable components inside the switch cabinet and the cable room. The copper busbar is usually made of a material with good conductivity to ensure the efficiency of power transmission. The cable assembly usually includes a cable terminal 1 and other related electrical connectors, which are responsible for introducing power from outside the cable room into the copper busbar of the switch cabinet, thereby connecting to the entire power system. The cable assembly needs to ensure the stability and safety of the electrical connection.

[0040] The flexible connector 4 is a transition device used to connect the copper busbar and the cable terminal 1. Its presence makes the connection between the cable and the copper busbar more flexible, and can cope with cable displacement caused by factors such as soil settlement in buried environments, reducing the risk of electrical connection failure. Furthermore, the flexible connector 4 can adapt to changes in the length of the cable terminal 1 during remanufacturing and is compatible with cables made of different materials (such as copper and aluminum).

[0041] Furthermore, the specific operating principle of the cable compartment of the present invention is as follows: when electricity enters the cable compartment through the cable, it is first connected to the cable terminal 1 and then transmitted to the switch cabinet copper busbar 5 through the flexible connector 4. The flexible connector 4 not only provides a physical connection but also allows a certain amount of displacement to accommodate any potential movement of the cable. This ensures that even slight displacement of the cable will not cause additional stress on the copper busbar, thereby protecting the integrity of the electrical connection and the stability of the system. In addition, the flexible connector 4 can be selected from different material combinations according to actual needs to meet different cable connection requirements.

[0042] In wind turbine booster stations, 35kV power distribution equipment typically uses air-insulated switchgear, which is connected to 35kV collector lines, reactive power compensation, and other facilities via cables. The switchgear has a cable compartment inside, where the cable terminals connect directly to the copper busbars inside the switchgear.

[0043] In existing switchgear, collector lines are typically laid underground on soft soil. Over time, the soil can settle, causing cable displacement. This causes the cables to pull downward on the copper busbars in the switchgear, affecting the proper functioning of the connections. Furthermore, due to poor quality cable terminations, failures can occur after a period of operation, necessitating a replacement. However, existing structures do not allow for direct cable connection to the switchgear busbars, increasing maintenance difficulties.

[0044] Therefore, in order to solve the technical defects existing in the above-mentioned related technologies, the utility model provides a cable room of an air-insulated switchgear, which uses a soft connector 4 to realize the connection between the switchgear copper bus 5 and the cable assembly to adapt to any potential movement of the cable, thereby protecting the integrity of the electrical connection and the stability of the system.

[0045] Furthermore, the cable chamber of the present invention has the following advantages compared with the related art.

[0046] (1) Increased flexibility: By using a flexible connector 4 to connect the switch cabinet copper busbar 5 to the cable assembly, the cable compartment design allows a certain degree of displacement, solving the copper busbar stress problem caused by cable displacement. This design allows the cable terminal 1 to move within a certain range without affecting the stability of its connection with the copper busbar.

[0047] (2) Enhanced adaptability: The flexible connector 4 can adapt to cables of different materials, and can connect well to both copper core and aluminum alloy cables. This means that the cable compartment can flexibly adapt to different types of cables, enhancing its application range and compatibility.

[0048] (3) Easy maintenance: When the cable terminal 1 needs to be replaced or repaired, it can be achieved by replacing the soft connector 4 without having to re-lay the cable. This simplifies the maintenance process and reduces maintenance costs and time consumption.

[0049] (4) Structural optimization: The design of the internal structure of the cable housing takes into account the requirements of electrical safety distance. At the same time, through reasonable layout, the space inside the cable room is more efficiently utilized. This helps to reduce the overall size of the switch cabinet and save space resources.

[0050] (5) Improved safety performance: The connection method using the soft connector 4 can effectively reduce the failure rate caused by improper manufacture of the cable terminal 1 or cable displacement, thereby improving the overall operational safety and reliability of the system.

[0051] like Figure 3 and 4As shown, according to some embodiments of the present invention, the flexible connector 4 is sequentially formed with a first connecting portion 41, a bending portion 42 and a second connecting portion 43 along its length direction, the first connecting portion 41 is fixed to the switch cabinet copper bus 5, and the second connecting portion 43 is fixed to the cable assembly.

[0052] In this embodiment, the flexible connector 4 forms three parts, a first connecting portion 41, a bending portion 42, and a second connecting portion 43, in sequence along its length direction. The above structural design enables the flexible connector 4 to not only achieve an effective connection between the copper bus and the cable assembly, but also to absorb and relieve the stress caused by cable displacement to a certain extent.

[0053] Specifically, the first connection portion 41 is fixed to the switch cabinet copper busbar 5, ensuring the stability and reliability of the power transmission path. The design of the first connection portion 41 enables the flexible connector 4 to be firmly combined with the copper busbar, thereby ensuring the continuity and safety of power transmission.

[0054] The curved portion 42 is located between the first connecting portion 41 and the second connecting portion 43. Its function is to provide the necessary flexibility when the cable moves, avoiding the problem of excessive stress on the copper busbar caused by a hard connection. The design of the curved portion 42 also helps to adjust the length of the flexible connector 4 during installation, making it easier to adapt to different installation requirements.

[0055] The second connecting portion 43 is fixed to the cable assembly to ensure a stable and reliable electrical connection between the cable and the switch cabinet. The design of the second connecting portion 43 also takes into account good contact with the cable assembly to ensure the quality of the electrical connection.

[0056] In this way, the flexible connector 4 not only improves the flexibility of connecting the cable to the switch cabinet copper busbar 5, but also effectively extends the service life of the cable terminal 1 and reduces problems caused by cable displacement or re-manufacturing of the cable terminal 1. In addition, the design of the flexible connector 4 helps to simplify the spatial layout inside the cable room and improve the overall performance of the cable room.

[0057] like Figure 3 and 4 As shown, in some specific embodiments of the present invention, one side of the first connecting portion 41 forms a first mounting surface fixed to the switch cabinet copper bus 5, and one side of the second connecting portion 43 forms a second mounting surface for fixing to the cable assembly, and the first mounting surface and the second mounting surface are both located on the same side of the soft connector 4.

[0058] It is understood that the first mounting surface and the second mounting surface are located on the same side of the flexible connector 4, which makes installation more intuitive and convenient. During the installation process, the technician only needs to face one side of the flexible connector 4 to complete all connection work without turning or changing the angle, thereby improving installation efficiency.

[0059] The unified mounting surface design also facilitates better positioning during installation, ensuring accurate docking between the first connector 41 and the switch cabinet copper busbar 5, and between the second connector 43 and the cable assembly. This not only simplifies installation but also reduces the risk of installation failure or poor connection due to misalignment.

[0060] In this way, the unified mounting surface design makes daily inspection and maintenance more convenient. Maintenance personnel can easily check whether the connection parts are loose or have other problems. It is also easier to replace or adjust the flexible connector 4. The design of the first mounting surface and the second mounting surface on the same side helps to ensure the tightness and stability of the connection, reducing the asymmetric stress that may be generated by the mounting surfaces not being on the same side, thereby improving the reliability of the entire connection system.

[0061] like Figure 1 As shown, further, the bent portion 42 is bent in a direction away from the first mounting surface and the second mounting surface.

[0062] Analysis of the forces acting on the curved portion 42 reveals that the curved portion 42 bends away from the first and second mounting surfaces, effectively dispersing the stress generated during the connection process of the cable terminal 1 or copper busbar, thereby preventing damage caused by stress concentration at a single point. This design allows the flexible connector 4 to relieve stress through deformation of the curved portion 42 when subjected to external tension or pressure, thereby protecting the connection point from damage.

[0063] At the same time, the design of the curved portion 42 increases the flexibility of the flexible connector 4, providing it with greater room for movement when the cable moves. This flexibility helps compensate for changes in the cable's position due to factors such as soil settlement, and prevents the cable from pulling down the copper busbar and affecting the operation of the connection point.

[0064] The design of bending in the direction away from the first mounting surface and the second mounting surface enables the flexible connector 4 to maintain good connection performance under different installation conditions. No matter what position the cable terminal 1 is in, the flexible connector 4 can adapt by deforming itself, ensuring the reliability and stability of the connection.

[0065] In addition, the design of the curved portion 42 also helps optimize the spatial layout inside the cable compartment. Due to the presence of the curved portion 42, the connection between the cable terminal 1 and the switch cabinet copper busbar 5 can be made more compact, reducing unnecessary space occupation, thereby making the cable compartment design more compact and efficient.

[0066] like Figure 1 As shown, further, the bent portion 42 is disposed adjacent to the second mounting surface.

[0067] It can be understood that since the bend 42 is adjacent to the second mounting surface, when the cable is affected by external factors (such as soil settlement), the stress can be more evenly distributed between the bend 42 and the second connecting portion 43, thereby avoiding excessive stress concentration and protecting the cable terminal 1 and the copper busbar from excessive stress.

[0068] In addition, when the cable terminal 1 or the flexible connector 4 needs to be replaced, since the bent portion 42 is adjacent to the second mounting surface, the part that needs to be replaced can be more easily accessed, thereby simplifying the maintenance process and reducing the difficulty of maintenance.

[0069] like Figure 3 and 4 As shown, in some specific embodiments, the first connection portion 41 is parallel to the second connection portion 43 , and both the first connection portion 41 and the second connection portion 43 are in a straight plate shape.

[0070] Because both the first connecting portion 41 and the second connecting portion 43 are straight, the fixed positions of the switch cabinet copper busbar 5 and the cable assembly can be intuitively aligned during installation, making the installation process simpler and faster, and reducing the possibility of installation errors. The straight design provides a larger contact area, making the connection between the first connecting portion 41 and the switch cabinet copper busbar 5 and the second connecting portion 43 and the cable assembly more stable. The larger contact area helps to distribute pressure at the contact points, reduce local stress concentration, and improve connection reliability.

[0071] Furthermore, the straight-shaped design facilitates maintenance and inspection. When the flexible connector 4 needs to be replaced or adjusted, the straight-shaped structure makes disassembly and installation easier, reducing maintenance complexity. Furthermore, the straight-shaped design ensures the continuity of the current path, reducing resistance during current transmission, thereby improving conductivity and reducing energy loss.

[0072] like Figure 3 As shown, in some specific embodiments of the present invention, the flexible connectors 4 are all made of copper.

[0073] In this embodiment, all parts of the flexible connector 4, including the first connecting portion 41, the curved portion 42, and the second connecting portion 43, are made of copper. Copper has excellent electrical conductivity, ensuring efficient current transmission. It also has high mechanical strength, capable of withstanding stress at the connection between the cable and the switchgear copper busbar 5.

[0074] like Figure 4 As shown, in other specific embodiments of the present invention, in the soft connector 4, the bent portion 42 and the second connecting portion 43 are both made of aluminum, the free end of the first connecting portion 41 is made of copper, and the connection between the first connecting portion 41 and the bent portion 42 is made of aluminum.

[0075] In this embodiment, different parts of the flexible connector 4 are made of different materials. Specifically, the bent portion 42 and the second connecting portion 43 are made of aluminum, while the free end of the first connecting portion 41 is made of copper, and the connection between the first connecting portion 41 and the bent portion 42 is also made of aluminum.

[0076] It can be understood that, on the one hand, the cost of aluminum material is relatively low, and using aluminum material as part of the soft connector 4 can reduce manufacturing costs while ensuring basic performance; on the other hand, aluminum material is lighter than copper, and using aluminum material can reduce the overall weight of the soft connector 4.

[0077] In addition, the free end of the first connecting portion 41 is made of copper, which can ensure good contact and conductivity with the switch cabinet copper bus 5, while the use of aluminum can better be compatible with cable components (especially aluminum alloy cables) and reduce the risk of electrochemical corrosion.

[0078] According to some embodiments of the present invention, if the cable terminal 1 is damaged and needs to be remade, the flexible connection can be replaced with a strip-type wiring board (i.e., an extended Figure 3 L1 or Figure 4 The soft connection of L4 in the cable can be used to repair the fault without replacing the cable.

[0079] For example Figure 3 As shown, the width of the flexible connector 4 is A, the length of the first connecting portion 41 is L1, the length of the bent portion 42 is L2, the length of the second connecting portion 43 is the same as the length of the first connecting portion 41 and is L1, and the flexible connector 4 is made of copper.

[0080] For example Figure 4 As shown, the width of the soft connector 4 is A, the length of the first connecting part 41 is L3+L4, the length of the bent part 42 is L2, the length of the second connecting part 43 is L1, and the second connecting part 43 and the bent part 42 are made of aluminum, the L4 part of the first connecting part 41 is made of copper, and the L3 part of the first connecting part 41 is made of aluminum.

[0081] like Figure 1 As shown, according to some embodiments of the present invention, a cable assembly includes a cable terminal 1 , a cable fixing clamp 2 and a terminal connection terminal 3 .

[0082] The cable clamp 2 is fixed on the inner wall of the cable chamber, and the cable terminal 1 passes through and is fixed in the cable clamp 2 . The end of the cable terminal 1 is connected to the terminal terminal 3 , and the second connecting portion 43 is fixed to the terminal terminal 3 .

[0083] In this embodiment, the cable clamp 2 is fixed to the inner wall of the cable compartment. Its function is to secure the cable in place within the compartment and prevent it from moving due to external factors (such as vibration or displacement). This helps maintain a stable connection between the cable terminal 1 and the switchgear busbar 5. The cable terminal 1 passes through the cable clamp 2 and is secured within it, ensuring that it will not be dislodged due to cable tension or other external forces. This prevents loosening of the connection between the cable terminal 1 and the switchgear busbar 5, ensuring a reliable connection.

[0084] The end of the cable terminal 1 is connected to the terminal connection terminal 3, which is used to connect the cable terminal 1 to the second connection part 43 of the flexible connector 4. In this way, an electrical connection is established between the cable and the switch cabinet copper bus 5.

[0085] For example, the terminal connection terminal 3 includes an arc plate portion and a sleeve portion, wherein the dimensions of the terminal connection terminal 3 are as follows: Figure 3 shown.

[0086] like Figure 1 As shown, according to some embodiments of the present invention, an SF6 collector 6 is further provided in the accommodation space.

[0087] It should be explained that the SF6 collector 6 is mainly used to monitor whether SF6 gas leaks. SF6 gas is an insulating and arc-extinguishing medium commonly used in high-voltage electrical equipment. Its characteristic is that it is heavier than air. When SF6 gas leaks, it sinks and accumulates in lower locations such as the cable room. By setting up the SF6 collector 6 in the cable room, gas leakage can be detected in the early stage, so that timely measures can be taken to avoid safety hazards caused by SF6 gas leakage. The installation position of the SF6 collector 6 is usually close to the SF6 circuit breaker, because the SF6 circuit breaker is directly above the cable room, separated by a board, so that leakage can be monitored more effectively.

[0088] In some embodiments of the present invention, due to the safety clearance requirements for bare conductors from non-charged parts, a transitional material is used to minimize the distance between cable terminals and ground. The copper busbar in the cable compartment should be positioned at an appropriate height. The distance between the copper busbar 5 of a 35kV switchgear and the ground should be no less than 300mm. The cable terminal 1 for a 35kV cable generally requires 500mm. Considering appropriate margins, the distance between the edge of the switchgear copper busbar 5 and the bottom of the switchgear should ideally be 850mm.

[0089] Furthermore, the switch cabinet is a closed metal armored device. In order to match the cable entry at the bottom, the bottom of the switch cabinet can be set as a detachable thin plate instead of a welded steel plate structure integrated with the structural column.

[0090] like Figures 1 to 4As shown, the air-insulated switchgear according to the embodiment of the second aspect of the present utility model includes the cable room of the air-insulated switchgear according to the embodiment of the first aspect of the present utility model.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A cable room of an air-insulated switchgear, characterized in that: include: The cable housing has an accommodating space formed inside, in which a switch cabinet copper busbar and a cable assembly are arranged. The switch cabinet copper busbar is connected to the inside of the switch cabinet, and the cable assembly is connected to the outside of the switch cabinet. The switch cabinet copper busbar and the cable assembly are connected by a soft connector.

2. The cable room of the air-insulated switchgear according to claim 1, characterized in that: The flexible connector is sequentially formed with a first connecting portion, a bending portion and a second connecting portion along its length direction. The first connecting portion is fixed to the switch cabinet copper busbar, and the second connecting portion is fixed to the cable assembly.

3. The cable room of the air-insulated switchgear according to claim 2, characterized in that: One side of the first connecting portion forms a first mounting surface for fixing to the switch cabinet copper busbar, and one side of the second connecting portion forms a second mounting surface for fixing to the cable assembly, and the first mounting surface and the second mounting surface are both located on the same side of the flexible connector.

4. The cable room of the air-insulated switchgear according to claim 3, characterized in that: The bent portion is bent in a direction away from the first mounting surface and the second mounting surface.

5. The cable room of the air-insulated switchgear according to claim 3, characterized in that: The bent portion is disposed adjacent to the second mounting surface.

6. The cable room of the air-insulated switchgear according to claim 2, characterized in that: The first connecting portion is parallel to the second connecting portion, and both the first connecting portion and the second connecting portion are in a straight plate shape.

7. The cable room of the air-insulated switchgear according to any one of claims 2 to 6, characterized in that: The flexible connectors are all made of copper; or, in the flexible connector, the bent portion and the second connector are both made of aluminum, the free end of the first connector is made of copper, and the connection between the first connector and the bent portion is made of aluminum.

8. The cable room of the air-insulated switchgear according to any one of claims 2 to 6, characterized in that: The cable assembly includes a cable terminal, a cable fixing clamp and a terminal connection terminal; The cable fixing clamp is fixed on the inner wall of the cable chamber, and the cable terminal passes through and is fixed in the cable fixing clamp, the end of the cable terminal is connected to the terminal wiring terminal, and the second connecting portion is fixed to the terminal wiring terminal.

9. The cable room of the air-insulated switchgear according to any one of claims 1 to 6, characterized in that: An SF6 collector is also provided in the accommodating space.

10. An air-insulated switchgear, characterized in that: include: The cable compartment of the air-insulated switchgear according to any one of claims 1 to 9.

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