GIS reserved interval and GIS device

Abstract

The utility model belongs to electrical equipment technical field discloses a GIS reserved interval and GIS equipment, GIS reserved interval includes first bus, second bus, first isolation ground switch, second isolation ground switch, first air chamber, second air chamber, third air chamber and common ground switch, first isolation ground switch and first bus electricity is connected, second isolation ground switch and second bus electricity is connected, first isolation ground switch is connected with second isolation ground switch through first air chamber, third air chamber and second air chamber in proper order, the third air chamber is provided with the extension interface, and the extension interface is detachably connected with the closed casing, and the third air chamber is provided with the butt joint conductor, the butt joint conductor is electrically connected with first isolation ground switch, second isolation ground switch and common ground switch, this GIS reserved interval can satisfy high reliable safety, low cost and simple operation's requirement when satisfying the non -power expansion, simplifies the structure of the extension device.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a GIS reserved space and GIS equipment. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) is widely used in power grids due to its advantages such as small footprint, low failure rate, and high reliability. GIS is usually designed with reserved unit interfaces for long-term planning, so that expansion can be carried out at these reserved interfaces. In order to avoid affecting the normal operation of the power grid, expansion is usually required to be carried out without power interruption at the reserved interval of GIS.

[0003] During GIS (Gas-Insulated Switchgear) expansion construction without power outages, ensuring the safety of personnel working around the expansion interface is extremely important. One related technology uses double-break disconnect switches to achieve this. However, the development cycle for double-break disconnect switches is lengthy, requiring a complete set of type tests. Furthermore, double-break disconnect switches have a larger number of components, are more complex to operate, and are more expensive. Their assembly process is also more cumbersome than that of ordinary single-break disconnect switches, resulting in more complex expansion devices and higher expansion costs.

[0004] Therefore, there is an urgent need for a GIS reserved interval and GIS equipment to solve the above-mentioned problems in related technologies. Utility Model Content

[0005] The purpose of this utility model is to provide a GIS reserved interval and GIS equipment that can meet the requirements of high reliability and safety, low cost and simple operation while satisfying the need for uninterrupted power expansion, and simplifying the structure of the expansion device.

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

[0007] On the one hand, a GIS reserved bay is provided, including a first busbar, a second busbar, a first isolating grounding switch, a second isolating grounding switch, a first air chamber, a second air chamber, a third air chamber, and a common grounding switch;

[0008] The first isolating grounding switch is electrically connected to the first busbar, and the second isolating grounding switch is electrically connected to the second busbar; the first isolating grounding switch is connected to the second isolating grounding switch in sequence through the first air chamber, the third air chamber, and the second air chamber.

[0009] The third air chamber is provided with an expansion interface, and a closed shell is detachably connected to the expansion interface. A docking conductor is provided inside the third air chamber. The docking conductor is electrically connected to the first isolation grounding switch, the second isolation grounding switch, and the common grounding switch.

[0010] As an optional solution for the GIS reserved interval provided by this utility model, the GIS reserved interval further includes:

[0011] A shielding element, which is detachably connected to the mating conductor.

[0012] As an optional solution for the GIS reserved interval provided by this utility model, the shielding component includes a connecting part and a shielding head;

[0013] The docking conductor is provided with a first cavity, the connecting part can be inserted into the first cavity and make conductive contact with the docking conductor, the shielding head is located outside the first cavity, and the end of the shielding head is provided with a spherical structure.

[0014] As an optional solution for the GIS reserved interval provided by this utility model, at least a portion of the shielding member extends into the enclosed housing.

[0015] As an optional solution for the GIS reserved interval provided by this utility model, the first air chamber and the second air chamber are respectively arranged at both ends of the third air chamber in the horizontal direction;

[0016] The expansion interface is located at the lower end of the third air chamber, and a connection port is provided at the upper end of the third air chamber. The common grounding switch is connected to the connection port and is in conductive contact with or separated from the docking conductor.

[0017] As an optional solution for the GIS reserved interval provided by this utility model, a first conductive component is provided in the first air chamber. The first conductive component includes a first conductor and a first socket that are plugged into each other. One of the first conductor and the first socket is electrically connected to the first isolation grounding switch, and the other is electrically connected to the docking conductor.

[0018] And / or, the second air chamber is provided with a second conductive component, the second conductive component including a second conductor and a second socket that are plugged into each other, one of the second conductor and the second socket being electrically connected to the second isolation grounding switch, and the other being electrically connected to the mating conductor.

[0019] As an optional solution for the GIS reserved interval provided by this utility model, a third conductive component is provided in the third air chamber, and the third conductive component includes a mounting conductor;

[0020] The first end of the mounting conductor is connected to the docking conductor, and the second end of the mounting conductor is connected to a first grounding stationary contact. The first grounding stationary contact is used to connect or disconnect with the grounding moving contact of the common grounding switch.

[0021] The third end of the mounting conductor is connected to the first conductive component via a plug-in mating third conductor and a third socket.

[0022] The fourth end of the third conductor is connected to the second conductive component via the fourth conductor.

[0023] As an optional solution for the GIS reserved interval provided by this utility model, a first insulator is provided between the third air chamber and the first air chamber;

[0024] And / or, a second insulator is provided between the third air chamber and the second air chamber;

[0025] And / or, a third insulator is provided between the first air chamber and the first isolating grounding switch;

[0026] And / or, a fourth insulator is provided between the second air chamber and the second isolating grounding switch.

[0027] As an optional solution for the GIS reserved interval provided by this utility model, the first air chamber is provided with a first pressure regulating component for adjusting the air pressure inside the first air chamber;

[0028] And / or, the second air chamber is provided with a second pressure regulating element for adjusting the air pressure inside the second air chamber;

[0029] And / or, the third air chamber is provided with a third pressure regulating component for adjusting the air pressure inside the third air chamber.

[0030] On the other hand, a GIS device is provided, including an expansion device and a GIS reserved interval as described above, wherein the expansion device is connected to the docking conductor through the expansion interface.

[0031] The beneficial effects of this utility model are:

[0032] This utility model provides a GIS reserved bay and GIS equipment using the reserved bay. When expanding at the expansion interface of the reserved bay, both the first and second isolating grounding switches are switched to the grounding position, ensuring that both the first and second busbars are grounded. This guarantees electrical isolation between the connecting conductor and the first busbar, and between the connecting conductor and the second busbar, forming a double break and increasing the safety margin. The common grounding switch is also switched to the grounding position, grounding the connecting conductor and improving the safety at the connecting conductor location. This meets the high insulation margin expansion requirements for GIS expansion and on-site withstand voltage uninterrupted power supply. Afterwards, the sealed housing is opened, and after the expansion equipment is in place, it is connected to the connecting conductor in the third chamber through the expansion interface until the connection is completed, at which point subsequent related tests are conducted. By setting a first air chamber between the third air chamber where the docking conductor is located and the first isolating grounding switch, and setting a second air chamber between the third air chamber and the second isolating grounding switch, the insulation reliability between the docking conductor and the first busbar, and between the docking conductor and the second busbar, can be improved. This ensures reliable electrical isolation between the docking conductor and the first and second busbars during expansion. Moreover, the setting of the first and second air chambers is simpler and less expensive than the structure of a double-break isolating switch. While meeting the requirements of uninterrupted expansion, it can also meet the requirements of high reliability and safety, low cost and simple operation, simplifying the structure of the expansion device. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in 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 drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the GIS reserved interval and expansion equipment provided in a specific embodiment of this utility model;

[0035] Figure 2 This is a first view of the GIS reserved interval provided in a specific embodiment of this utility model;

[0036] Figure 3 This is a second view of the GIS reserved interval provided in a specific embodiment of this utility model;

[0037] Figure 4 This is a partial view of the GIS reserved interval provided in a specific embodiment of this utility model;

[0038] Figure 5 This is a diagram illustrating the first docking process of the GIS reserved interval and expansion equipment provided in a specific embodiment of this utility model;

[0039] Figure 6 This is a diagram illustrating the second docking process of the GIS reserved interval and expansion equipment provided in a specific embodiment of this utility model;

[0040] Figure 7 This is a diagram illustrating the third docking process of the GIS reserved interval and expansion equipment provided in a specific embodiment of this utility model.

[0041] In the picture:

[0042] 100. GIS reserved space; 200. Equipment expansion;

[0043] 1. First busbar; 2. Second busbar; 3. First isolating grounding switch; 4. Second isolating grounding switch; 5. First air chamber; 6. Second air chamber; 7. Third air chamber; 8. Common grounding switch; 9. Enclosed housing; 10. Shielding component; 20. First insulator; 30. Second insulator; 40. Third insulator; 50. Fourth insulator;

[0044] 31. First isolating stationary contact; 32. First moving contact; 33. Second grounding stationary contact;

[0045] 41. Second isolating stationary contact; 42. Second moving contact; 43. Third grounding stationary contact;

[0046] 51. First conductive component; 511. First conductor; 512. First socket;

[0047] 61. Second conductive component; 611. Second conductor; 612. Second socket;

[0048] 71. Expansion interface; 72. Connecting conductor; 73. Connection port; 74. Third conductive component;

[0049] 721. First insertion cavity;

[0050] 741. Install conductor; 742. First grounding stationary contact; 743. Third conductor; 744. Third socket; 745. Fourth conductor;

[0051] 81. Grounding moving contact;

[0052] 101. Connecting part; 102. Shielding head; 1021. Spherical structure;

[0053] 201. Conductive rod. Detailed Implementation

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0059] In the embodiments of this utility model, the same reference numerals denote the same parts, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0060] like Figure 1As shown, this embodiment provides a GIS device, including a GIS reserved interval 100 and an expansion device 200. The GIS reserved interval 100 is constructed during the initial construction phase, and the expansion device 200 is connected to the GIS reserved interval 100 during the subsequent expansion of the GIS device. Figure 1 The left side of the GIS reserved interval 100 is the circuit structure diagram corresponding to the GIS reserved interval 100; the left side of the expansion equipment 200 is the circuit structure diagram corresponding to the expansion equipment 200, so that the electrical connection between the two can be realized during the expansion docking.

[0061] like Figure 2 The diagram shown is a structural schematic of the GIS reserved bay 100 provided in this embodiment. The GIS reserved bay 100 includes a first busbar 1, a second busbar 2, a first isolation grounding switch 3, a second isolation grounding switch 4, a first air chamber 5, a second air chamber 6, a third air chamber 7, and a common grounding switch 8.

[0062] The first isolating grounding switch 3 is electrically connected to the first busbar 1, and the second isolating grounding switch 4 is electrically connected to the second busbar 2. The first isolating grounding switch 3 is connected to the second isolating grounding switch 4 in sequence through the first air chamber 5, the third air chamber 7, and the second air chamber 6. The third air chamber 7 is provided with an expansion interface 71, and a closed housing 9 is detachably connected to the expansion interface 71. A mating conductor 72 is provided inside the third air chamber 7. The mating conductor 72 is electrically connected to the first isolating grounding switch 3, the second isolating grounding switch 4, and the common grounding switch 8.

[0063] Specifically, the expansion equipment 200 is connected to the docking conductor 72 via the expansion interface 71.

[0064] In this embodiment, the GIS reserved interval 100 and the GIS equipment using the GIS reserved interval 100 are used for expansion at the expansion interface 71 of the reserved interval. During this expansion, both the first isolation grounding switch 3 and the second isolation grounding switch 4 are switched to the grounding position, ensuring that both the first busbar 1 and the second busbar 2 are grounded. This guarantees electrical isolation between the docking conductor 72 and the first busbar 1, and between the docking conductor 72 and the second busbar 2, forming a double break and increasing the safety margin. The common grounding switch 8 is also switched to the grounding position, grounding the docking conductor 72 and improving the safety at the docking conductor 72 location. This meets the high insulation margin expansion requirements for GIS expansion docking and on-site withstand voltage uninterrupted power supply. Afterwards, the closed housing 9 is opened, and after the expansion equipment 200 is in place, it is docked with the docking conductor 72 in the third air chamber 7 through the expansion interface 71 until the docking is completed, at which point subsequent related tests are conducted. By setting a first air chamber 5 between the third air chamber 7 where the docking conductor 72 is located and the first isolating grounding switch 3, and setting a second air chamber 6 between the third air chamber 7 and the second isolating grounding switch 4, the insulation reliability between the docking conductor 72 and the first busbar 1 and between the docking conductor 72 and the second busbar 2 can be improved, ensuring reliable electrical isolation between the docking conductor 72 and the first busbar 1 and the second busbar 2 during expansion. Moreover, the setting of the first air chamber 5 and the second air chamber 6 is simpler and cheaper than the double-break isolating switch structure. While meeting the requirements of uninterrupted power supply expansion, it can also meet the requirements of high reliability and safety, low cost and simple operation, simplifying the structure of the expansion device.

[0065] Specifically, the first isolating grounding switch 3 includes a first housing and a first isolating stationary contact 31, a first stationary contact seat, a first moving contact 32, a first moving contact seat, and a second grounding stationary contact 33 disposed on the first housing. The first stationary contact seat and the second grounding stationary contact 33 are both connected to the first housing. The first isolating stationary contact 31 is disposed on the first stationary contact seat, and the first moving contact seat is located between the first isolating stationary contact 31 and the second grounding stationary contact 33. The first moving contact 32 is slidably disposed on the first moving contact seat and can slide upward to make conductive contact with the first isolating stationary contact 31 (at which time the isolating switch is closed and the grounding switch is open) or slide downward to make conductive contact with the second grounding stationary contact 33 (at which time the grounding switch is closed and the isolating switch is open).

[0066] The second isolating grounding switch 4 includes a second housing and a second isolating stationary contact 41, a second stationary contact seat, a second moving contact 42, a second moving contact seat, and a third grounding stationary contact 43 disposed in the second housing. The second stationary contact seat and the third grounding stationary contact 43 are both connected to the second housing. The second isolating stationary contact 41 is disposed on the second stationary contact seat. The second moving contact seat is located between the second isolating stationary contact 41 and the third grounding stationary contact 43. The second moving contact 42 is slidably disposed on the second moving contact seat and can slide upward to make conductive contact with the second isolating stationary contact 41 (at which time the isolating switch is closed and the grounding switch is open) or slide downward to make conductive contact with the third grounding stationary contact 43 (at which time the grounding switch is closed and the isolating switch is open).

[0067] like Figure 3 As shown, both the first isolating grounding switch 3 and the second isolating grounding switch 4 are in the grounded position, achieving safe grounding of the first busbar 1 and the second busbar 2. Isolation breaks are formed between the first moving contact 32 and the first isolating stationary contact 31, and between the second moving contact 42 and the second isolating stationary contact 41, achieving electrical isolation between the docking conductor 72 and the first busbar 1 and the second busbar 2. At the same time, the grounding moving contact 81 of the common grounding switch 8 extends into the third air chamber 7 and makes conductive contact with the docking conductor 72, ensuring the safe grounding of the docking conductor 72. At this time, the GIS reserved bay 100 is ready to connect to the future expansion equipment 200.

[0068] Meanwhile, of the two main busbars (i.e., the first busbar 1 and the second busbar 2), one is usually a standby busbar and the other is an operating busbar. The standby busbar is not energized and is grounded in its entirety. The purpose of grounding the entire section is to prevent overvoltage of the equipment casing from causing personal injury during expansion and to reduce safety risks.

[0069] As some examples, such as Figure 2 and Figure 3 As shown, the GIS reserved interval 100 also includes a shield 10, which is detachably connected to the docking conductor 72. Before the expansion equipment 200 is docked, the shield 10 can replace the future expansion equipment 200 to form a complete and safe electrical enclosure system, which plays a good role in electrical shielding, equalizes the electric field distribution, prevents partial discharge, avoids insulation breakdown accidents, and improves safety.

[0070] When the first isolating grounding switch 3, the second isolating grounding switch 4, and the common grounding switch 8 are all in a safe grounding state, such as Figure 3 As shown, after disassembling the enclosed housing 9, the shield 10 is removed from the docking conductor 72, thereby completing the electrical connection between the expansion equipment 200 and the docking conductor 72.

[0071] Specifically, such as Figure 3 and Figure 4As shown, the shielding component 10 includes a connecting portion 101 and a shielding head 102. The mating conductor 72 is provided with a first insertion cavity 721. The connecting portion 101 can be inserted into the first insertion cavity 721 and makes conductive contact with the mating conductor 72, ensuring a stable connection between the shielding component 10 and the mating conductor 72, thus achieving electrical shielding. The shielding head 102 is located outside the first insertion cavity 721, and its end is provided with a spherical structure 1021. The spherical structure 1021 optimizes the electric field distribution and prevents electric field concentration, thereby maximizing insulation performance.

[0072] like Figure 4 As shown, in some embodiments, at least a portion of the shield 10 extends into the enclosure 9. When the enclosure 9 is removed, the lower end of the shield 10 is below the expansion interface 71, making it easier for operators to remove the shield 10.

[0073] Furthermore, a spring contact finger is provided in the first cavity 721 of the docking conductor 72, and the connecting part 101 of the shield 10 makes elastic conductive contact with the spring contact finger.

[0074] like Figure 2 and Figure 4 A first insulator 20 is installed between the third chamber 7 and the first chamber 5 to ensure a sealed connection between the two chambers while maintaining electrical insulation of their outer shells. A second insulator 30 is installed between the third chamber 7 and the second chamber 6 to ensure a sealed connection between the two chambers while maintaining electrical insulation of their outer shells. A third insulator 40 is installed between the first chamber 5 and the first isolating grounding switch 3 to ensure a sealed connection between the two chambers while maintaining electrical insulation of their outer shells. A fourth insulator 50 is installed between the second chamber 6 and the second isolating grounding switch 4 to ensure a sealed connection between the two chambers while maintaining electrical insulation of their outer shells.

[0075] Furthermore, the first air chamber 5 is equipped with a first pressure regulating component for adjusting the air pressure inside the first air chamber 5; the second air chamber 6 is equipped with a second pressure regulating component for adjusting the air pressure inside the second air chamber 6; and the third air chamber 7 is equipped with a third pressure regulating component for adjusting the air pressure inside the third air chamber 7. When the sealed housing 9 is disassembled, the air pressure inside the third air chamber 7 is atmospheric pressure. At this time, there is a pressure difference between the first air chamber 5 and the third air chamber 7, and there is also a pressure difference between the second air chamber 6 and the third air chamber 7. This pressure difference can easily cause explosive rupture damage to the first insulator 20 and the second insulator 30, threatening the personal safety of the workers. By using the first and second pressure regulating components, the air pressure inside the first air chamber 5 and the second air chamber 6 can be reduced, for example, by half-pressure reduction, thereby reducing the pressure difference between the first insulator 20 and the second insulator 30 and improving the safety of the first insulator 20 and the second insulator 30.

[0076] For example, the first pressure regulating component, the second pressure regulating component, and the third pressure regulating component are all valves.

[0077] like Figure 4 As shown, the first air chamber 5 and the second air chamber 6 are horizontally positioned at both ends of the third air chamber 7. An expansion interface 71 is located at the lower end of the third air chamber 7, and a connection port 73 is located at the upper end of the third air chamber 7. A common grounding switch 8 is connected to the connection port 73 and is electrically contacted or disconnected from the mating conductor 72. That is, the common grounding switch 8 is located at the upper end of the third air chamber 7, the enclosed housing 9 is located at the lower end of the third air chamber 7, and the first air chamber 5 and the second air chamber 6 are located at the left and right ends of the third air chamber 7, respectively. This layout is reasonable and compact, facilitating expansion operations.

[0078] like Figure 2 and Figure 4 As shown, a first conductive component 51 is disposed within the first air chamber 5. The first conductive component 51 includes a first conductor 511 and a first socket 512 that are plugged into each other. One of the first conductor 511 and the first socket 512 is electrically connected to the first isolating grounding switch 3, and the other is electrically connected to the mating conductor 72, thereby realizing the electrical connection between the mating conductor 72 and the first isolating grounding switch 3. Specifically, the first conductor 511 is connected to the first moving contact seat through the embedded conductor in the third insulator 40 and the first connecting conductor. The first socket 512 is plugged into the first conductor 511 in a horizontal direction through the second insertion cavity and is connected to the embedded conductor of the first insulator 20.

[0079] The second air chamber 6 is equipped with a second conductive component 61, which includes a second conductor 611 and a second socket 612 that are plugged into each other. One of the second conductor 611 and the second socket 612 is electrically connected to the second isolating grounding switch 4, and the other is electrically connected to the mating conductor 72, thereby realizing the connection between the mating conductor 72 and the second isolating grounding switch 4. Specifically, the second conductor 611 is connected to the second moving contact seat through the embedded conductor and the second connecting conductor in the fourth insulator 50. The second socket 612 is plugged into the second conductor 611 in a horizontal direction through the third insertion cavity and is connected to the embedded conductor of the second insulator 30.

[0080] like Figure 4 As shown, a third conductive component 74 is provided in the third air chamber 7. The third conductive component 74 includes a mounting conductor 741. The first end of the mounting conductor 741 is connected to a mating conductor 72, and the second end of the mounting conductor 741 is connected to a first grounding stationary contact 742. The first grounding stationary contact 742 is used to connect or disconnect with the grounding moving contact 81 of the common grounding switch 8 to realize the closing and opening of the common grounding switch 8.

[0081] The third end of the mounting conductor 741 is connected to the first conductive component 51 via a plug-in mating third conductor 743 and a third socket 744. Specifically, the third end of the mounting conductor 741 is connected to the third conductor 743, and the third socket 744 is plugged into the third conductor 743 horizontally via a fourth insertion cavity. The end of the third socket 744 away from the third conductor 743 is connected to the embedded conductor of the first insulator 20. The fourth end of the third conductor 743 is connected to the second conductive component 61 via a fourth conductor 745. Specifically, the end of the fourth conductor 745 away from the mounting conductor 741 is connected to the embedded conductor of the fourth insulator 50.

[0082] like Figure 4 As shown, the first end of the conductor 741 is its lower end, the second end is its upper end, the third end is its left end, and the fourth end is its right end, which improves the rationality of the structural layout.

[0083] like Figure 5 , Figure 6 as well as Figure 7 As shown, the construction process of the GIS reserved interval 100 provided in this embodiment during expansion is roughly as follows:

[0084] like Figure 5 As shown, before the expansion, the first and second pressure regulating components were used to reduce the pressure of the first air chamber 5 and the second air chamber 6 by half, respectively. Simultaneously, the first and second isolating grounding switches 3 and 4 were both in the grounded closed state. To ensure safety during docking, the common grounding switch 8 on the third air chamber 7 was switched to the grounded closed state. Then, the enclosed housing 9 and shielding component 10 at the lower end of the third air chamber 7 were removed, exposing the first insertion cavity 721 of the docking conductor 72. Since the first isolating grounding switch 3, the second isolating grounding switch 4, and the common grounding switch 8 were all in a safe grounded state at this time, the GIS reserved bay 100 was ready to dock with the future expansion equipment 200.

[0085] After the above-mentioned preparatory work for the expansion is completed, the connection between the expansion equipment 200 and the GIS reserved interval 100 is completed, as follows.

[0086] S1. The expansion equipment 200 is in place and ready for docking. At this time, the first moving contact 32 in the first isolating grounding switch 3 separates from the first isolating stationary contact 31 and is inserted into the second grounding stationary contact 33. The second moving contact 42 in the second isolating grounding switch 4 separates from the second isolating stationary contact 41 and is inserted into the third grounding stationary contact 43 to ensure that the two switches are safely grounded. At the same time, the shared grounding switch 8 is in the grounding closed state.

[0087] S2. After the expansion equipment 200 is in place, align the conductive rod 201 of the expansion equipment 200 with the first cavity 721 of the docking conductor 72 of the GIS reserved interval 100, and then proceed with the expansion equipment 200 along... Figure 5 and Figure 6 Slowly connect the devices with the direction indicated by the middle arrow pointing upwards. During this process, ensure that the first isolation grounding switch 3, the second isolation grounding switch 4, and the common grounding switch 8 are all in a safe grounding state.

[0088] S3, such as Figure 7 As shown, after the docking is completed, the first moving contact 32 in the first isolating grounding switch 3 separates from the first isolating stationary contact 31 and separates from the second grounding stationary contact 33. The second moving contact 42 in the second isolating grounding switch 4 separates from the second isolating stationary contact 41 and separates from the third grounding stationary contact 43, so that the two switches are in the position of isolating and grounding open. The shared grounding switch 8 is in the position of grounding open. At this time, the docking and expansion of the GIS reserved bay 100 and the long-term expansion equipment 200 is completed. The relevant tests will be completed in accordance with the operating procedures.

[0089] 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 GIS reserved interval, characterized in that, It includes a first busbar (1), a second busbar (2), a first isolating grounding switch (3), a second isolating grounding switch (4), a first air chamber (5), a second air chamber (6), a third air chamber (7), and a common grounding switch (8); The first isolation grounding switch (3) is electrically connected to the first busbar (1), and the second isolation grounding switch (4) is electrically connected to the second busbar (2); the first isolation grounding switch (3) is connected to the second isolation grounding switch (4) in sequence through the first air chamber (5), the third air chamber (7) and the second air chamber (6); The third air chamber (7) is provided with an expansion interface (71), and a closed shell (9) is detachably connected to the expansion interface (71). A docking conductor (72) is provided inside the third air chamber (7). The docking conductor (72) is electrically connected to the first isolation grounding switch (3), the second isolation grounding switch (4), and the common grounding switch (8).

2. The GIS reserved interval according to claim 1, characterized in that, The GIS reserved interval also includes: A shield (10) is detachably connected to the docking conductor (72).

3. The GIS reserved interval according to claim 2, characterized in that, The shielding component (10) includes a connecting part (101) and a shielding head (102). The docking conductor (72) is provided with a first insertion cavity (721), the connecting part (101) can be inserted into the first insertion cavity (721) and make conductive contact with the docking conductor (72), the shielding head (102) is located outside the first insertion cavity (721), and the end of the shielding head (102) is provided with a spherical structure (1021).

4. The GIS reserved interval according to claim 2, characterized in that, At least a portion of the shield (10) extends into the enclosed housing (9).

5. The GIS reserved interval according to any one of claims 1-4, characterized in that, The first air chamber (5) and the second air chamber (6) are located at both ends of the third air chamber (7) in a horizontal direction; The expansion interface (71) is located at the lower end of the third air chamber (7), and the upper end of the third air chamber (7) is provided with a connection port (73). The common grounding switch (8) is connected to the connection port (73) and is in conductive contact with or separated from the docking conductor (72).

6. The GIS reserved interval according to any one of claims 1-4, characterized in that, The first air chamber (5) is provided with a first conductive component (51). The first conductive component (51) includes a first conductor (511) and a first socket (512) that are plugged in. One of the first conductor (511) and the first socket (512) is electrically connected to the first isolation grounding switch (3), and the other is electrically connected to the docking conductor (72). And / or, a second conductive component (61) is provided in the second air chamber (6), the second conductive component (61) includes a second conductor (611) and a second socket (612) that are plugged in, one of the second conductor (611) and the second socket (612) being electrically connected to the second isolation grounding switch (4), and the other being electrically connected to the docking conductor (72).

7. The GIS reserved interval according to claim 6, characterized in that, The third air chamber (7) is provided with a third conductive component (74), which includes a mounting conductor (741). The first end of the mounting conductor (741) is connected to the docking conductor (72), and the second end of the mounting conductor (741) is connected to a first grounding stationary contact (742). The first grounding stationary contact (742) is used to connect or disconnect from the grounding moving contact (81) of the common grounding switch (8). The third end of the mounting conductor (741) is connected to the first conductive component (51) through a plug-in mating third conductor (743) and a third socket (744); The fourth end of the third conductor (743) is connected to the second conductive component (61) via the fourth conductor (745).

8. The GIS reserved interval according to any one of claims 1-4, characterized in that, A first insulator (20) is provided between the third air chamber (7) and the first air chamber (5); And / or, a second insulator (30) is provided between the third air chamber (7) and the second air chamber (6); And / or, a third insulator (40) is provided between the first air chamber (5) and the first isolation grounding switch (3); And / or, a fourth insulator (50) is provided between the second air chamber (6) and the second isolating grounding switch (4).

9. The GIS reserved interval according to claim 8, characterized in that, The first air chamber (5) is provided with a first pressure regulating component for adjusting the air pressure inside the first air chamber (5); And / or, the second air chamber (6) is provided with a second pressure regulating element for adjusting the air pressure inside the second air chamber (6); And / or, the third air chamber (7) is provided with a third pressure regulating component for adjusting the air pressure inside the third air chamber (7).

10. A GIS device, characterized in that, Includes expansion equipment (200) and GIS reserved space as described in any one of claims 1-9, wherein the expansion equipment (200) is connected to the docking conductor (72) via the expansion interface (71).

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