A main busbar conductor, a main busbar conductor assembly and an isolated grounding switch

Abstract

The application relates to the field of switch devices, in particular to a main bus conductor, a main bus conductor assembly and an isolated grounding switch. The main bus conductor comprises a conductor section, the two ends of the conductor section are respectively provided with a first electric connection structure and a second electric connection structure, and a groove extending along the length direction of the conductor section is arranged on the conductor section. The application improves the main bus conductor in the prior art, the groove is arranged on the conductor section along the length direction of the conductor section, which is beneficial to reducing the use of materials and facilitating weight reduction; since the conductor surface mainly plays a role in current conduction when the conductor transmits alternating current, the central part of the conductor section does not contain a part with low electric conduction efficiency, which is beneficial to improving the utilization rate of the materials; in addition, the conductor surface area and the heat dissipation area are increased due to the groove, which is beneficial to timely heat dissipation of the conductor during the working process, therefore, the problems of the main bus conductor in the prior art, such as large weight, low material utilization rate and poor heat dissipation, are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of switchgear, in particular to a main busbar conductor, a main busbar conductor assembly and an isolation grounding switch. BACKGROUND

[0002] The three-position isolation grounding switch integrates the functions of isolation and grounding, and has small volume and high safety, so it is widely used in gas insulated metal-enclosed switchgear equipment. The three-position isolation grounding switch includes isolation static contacts and grounding static contacts installed on the conductor, and a movable contact selectively connects with the isolation static contacts or the grounding static contacts to realize the connection and grounding of the entire circuit, wherein the main busbar conductor bears the functions of collecting and transmitting electric energy, the isolation static contact seat on the conductor cooperates with the isolation movable end to disconnect the circuit of no-load current, form a clear break, and is mainly used for isolating voltage, opening the no-load circuit and switching operation.

[0003] For example, a kind of isolation-grounding combination switch and gas insulated metal-enclosed switchgear disclosed in Chinese patent with authorization announcement No.CN110517926B. The device has three-phase main busbar conductor inside, and the three-phase main busbar conductor is arc-shaped columnar conductor fixedly arranged on insulator, which can be electrically connected with main busbar respectively, and main busbar is main current bearing part. The main busbar conductor also has installation base for installing other electrical components, such as first static contact installation seat for installing isolation switch static end, and for three-position isolation grounding switch integrated with fast grounding switch, the main busbar conductor also has second static contact installation seat for installing fast grounding switch static contact.

[0004] However, the conductor in the prior art is of solid structure, which not only has heavy weight, but also has uneven current distribution inside the conductor due to the existence of skin effect when alternating current passes through the conductor, that is, the current is concentrated in the skin part of the conductor, that is, the thin layer on the surface of the conductor, and the actual current in the conductor is small. That is, in the process of alternating current transmission, the surface part of the conductor plays a major role, the core part of the conductor plays a small role, the utilization rate of the conductor material is low, and the conductor can only use the outer surface for heat dissipation, which is not conducive to the heat dissipation of the conductor. SUMMARY

[0005] The present application aims to provide a main busbar conductor to solve the problems of heavy weight, low material utilization and poor heat dissipation of the main busbar conductor in the prior art, and to provide a main busbar conductor assembly to solve the above technical problems, and to provide an isolation grounding switch to solve the above technical problems.

[0006] To achieve the above-mentioned purposes, the main busbar conductor in the present application adopts the following technical scheme:

[0007] A kind of main busbar conductor, including conductor section, first electric connection structure and second electric connection structure are arranged respectively in the two ends of conductor section, recess is opened in conductor section and extends along the length direction of conductor section.

[0008] The beneficial effects of the above technical solutions are that the main busbar conductor in the prior art is improved, a recess is opened in the conductor section along the length direction of the conductor section, which is beneficial to reduce the use of materials and facilitate weight reduction; since the conductor mainly functions as current-carrying when transmitting alternating current, the surface of the conductor, therefore, the part of the conductor section does not include the center with low conductivity, which is beneficial to improve the utilization rate of materials; in addition, the surface area of the conductor with the recess is increased, the heat dissipation area is increased, which is beneficial to the timely heat dissipation of the conductor during operation, thus solving the problems of the main busbar conductor in the prior art, such as large weight, low material utilization rate and poor heat dissipation.

[0009] Further, the cross section of the recess is U-shaped.

[0010] The beneficial effects of the above technical solutions are that the cross section of the recess is U-shaped, which facilitates manufacturing and processing.

[0011] Further, the first electric connection structure is a connecting column with an end plate, the connecting column has a cavity, the cavity is in communication with the inner cavity of the recess, the end plate is used for electrically connecting the conductor on the insulator through a fastener, and the end plate has a fastener mounting hole.

[0012] The beneficial effects of the above technical solutions are that the end plate is used and the fastener mounting hole is opened in the end plate, which facilitates the fixing and installation of the connecting column on the insulator, the connecting column has a large outer surface area, effectively ensuring the current carrying capacity of the first electric connection structure; secondly, the cavity wall of the connecting column cavity shields the irregular surface of the fastener after the fastener is installed in the mounting hole, avoiding the point discharge; furthermore, the cavity is in communication with the inner cavity of the recess, which not only facilitates the installation of the fastener, but also reduces the complexity of the structure.

[0013] Further, the second electric connection structure is a connecting cylinder for plug-in cooperation with the main busbar, and the inner wall of the connecting cylinder has a mounting structure for mounting a contact finger.

[0014] The beneficial effects of the above technical solutions are that the second electric connection structure is a connecting cylinder, which facilitates plug-in cooperation with the main busbar, simple connection, and the mounting structure for mounting the contact finger is provided on the inner wall of the connecting cylinder, which facilitates stable electrical connection with the main busbar during assembly.

[0015] Further, the conductor section is curved.

[0016] The beneficial effects of the above technical solutions are that the curved conductor section is convenient for fitting with the surrounding space.

[0017] Further, the conductor segment, the first electrical connection structure and the second electrical connection structure are integrally casted.

[0018] The above technical solution has the beneficial effect that: by integrally casting the conductor segment, the first electrical connection structure and the second electrical connection structure, convenient processing and manufacturing are achieved, and at the same time, there is no gap between different electrical components, avoiding arc discharge when the load current and the current size change.

[0019] Further, the conductor segment is integrally formed with a first static end mounting seat for mounting a static contact of an isolation grounding switch, and is also integrally formed with a second static end mounting seat for mounting a static contact of a quick grounding switch.

[0020] The above technical solution has the beneficial effect that: the versatility of the main busbar conductor is increased, and the first static end mounting seat and the second static end mounting seat can be used to mount the static contact of the isolation grounding switch and the static contact of the quick grounding switch, respectively.

[0021] To achieve the above-mentioned purpose, a main busbar conductor assembly in the present application adopts the following technical solution:

[0022] A main busbar conductor assembly comprises three-phase main busbar conductors arranged at intervals, wherein the structure of each phase main busbar conductor comprises a conductor segment, the two ends of the conductor segment are respectively provided with a first electrical connection structure and a second electrical connection structure, and a groove extending along the length direction of the conductor segment is formed on the conductor segment.

[0023] The above technical solution has the beneficial effect that: the present application improves the main busbar conductor in the prior art, and a groove is formed on the conductor segment along the length direction of the conductor segment, which is beneficial to reduce the use of materials and facilitate weight reduction; since the conductor surface mainly plays a role in conducting current when the conductor transmits alternating current, the center part of the conductor segment does not contain a part with low conductivity efficiency, which is beneficial to improve the utilization rate of materials; in addition, the surface area of the groove is increased, and the heat dissipation area is increased, which is beneficial to heat dissipation of the conductor during operation, thus solving the problems of large weight, low material utilization rate and poor heat dissipation of the main busbar conductor in the prior art.

[0024] Further, the cross section of the groove is U-shaped.

[0025] The above technical solution has the beneficial effect that: the cross section of the groove is U-shaped, which is convenient for manufacturing and processing.

[0026] Further, the first electrical connection structure is a connecting column with an end plate, the connecting column has a cavity, the cavity is in communication with the inner cavity of the groove, the end plate is used for electrical connection with the conductor on the insulator through a fastener, and the end plate has a fastener mounting hole.

[0027] The beneficial effects of the above technical solutions are that: the end plate is used and the fastener mounting hole is formed on the end plate, so that the connecting column can be fixedly installed on the insulator, the connecting column has a large outer surface area, and the current carrying capacity of the first electric connection structure is effectively ensured; secondly, the cavity wall of the connecting column cavity shields the bottom plate, and after the fastener is installed in the mounting hole, the irregular surface of the fastener can be shielded to avoid point discharge; furthermore, the cavity is communicated with the inner cavity of the groove, which not only facilitates the installation of the fastener, but also reduces the complexity of the structure.

[0028] Further, the second electric connection structure is a connecting cylinder for plug-in cooperation with the main bus bar, and the inner wall of the connecting cylinder is provided with a mounting structure for mounting a contact finger.

[0029] The beneficial effects of the above technical solutions are that: the second electric connection structure is a connecting cylinder, which is convenient for plug-in cooperation with the main bus bar, and the connection is simple; the mounting structure for mounting the contact finger is arranged on the inner wall of the connecting cylinder, which facilitates the assembly and stable electrical connection with the main bus bar.

[0030] Further, the conductor segment is curved.

[0031] The beneficial effects of the above technical solutions are that: the curved conductor segment is convenient for fitting the surrounding space.

[0032] Further, the conductor segment, the first electric connection structure and the second electric connection structure are integrally casted.

[0033] The beneficial effects of the above technical solutions are that: by integrally casting the conductor segment, the first electric connection structure and the second electric connection structure, the processing and manufacturing are facilitated, and at the same time, there is no gap between different electrical components, so that arc discharge is avoided when the load current and the current size change.

[0034] Further, the conductor segment is integrally formed with a first static end mounting seat for mounting a static contact of an isolation grounding switch, and the conductor segment is also integrally formed with a second static end mounting seat for mounting a static contact of a quick grounding switch.

[0035] The beneficial effects of the above technical solutions are that: the versatility of the main bus bar conductor is improved, and the first static end mounting seat and the second static end mounting seat can be used to respectively mount the static contact of the isolation grounding switch and the static contact of the quick grounding switch.

[0036] To achieve the above object, an isolation grounding switch in the present application adopts the following technical solutions:

[0037] An isolated grounding switch comprises a shell, a main bus conductor arranged in the shell, wherein the main bus conductor comprises a conductor segment, the conductor segment is provided with a first electric connection structure and a second electric connection structure at two ends respectively, and a groove is arranged on the conductor segment along the length direction of the conductor segment.

[0038] The beneficial effects of the above technical solution are that the main bus conductor in the prior art is improved, the groove is arranged on the conductor segment along the length direction of the conductor segment, which is beneficial to reduce the use of materials and facilitate weight reduction; since the conductor mainly plays a role of conducting current on the surface of the conductor when transmitting alternating current, the conductor segment does not contain the center part with low conductivity, which is beneficial to improve the utilization rate of materials; in addition, the surface area of the conductor with the groove is increased, the heat dissipation area is increased, which is beneficial to heat dissipation of the conductor during operation, thus solving the problems of large weight of the main bus conductor in the switch in the prior art, low material utilization rate and poor heat dissipation.

[0039] Further, the cross section of the groove is U-shaped.

[0040] The beneficial effects of the above technical solution are that the cross section of the groove is U-shaped, which is convenient for manufacturing and processing.

[0041] Further, the first electric connection structure is a connecting column with an end plate, the connecting column has a cavity, the cavity is communicated with the inner cavity of the groove, the end plate is used for electrically connecting the conductor on the insulator through a fastener, and the end plate is provided with a fastener mounting hole.

[0042] The beneficial effects of the above technical solution are that the end plate is used and the fastener mounting hole is arranged on the end plate, the connecting column is fixedly installed on the insulator, the connecting column has a large outer surface area, the current carrying capacity of the first electric connection structure is effectively ensured, the cavity wall of the connecting column can shield the irregular surface of the fastener after the fastener is installed in the mounting hole, and the sharp end discharge is avoided, the cavity is communicated with the inner cavity of the groove, the installation of the fastener is facilitated, and the structural complexity is reduced.

[0043] Further, the second electric connection structure is a connecting cylinder used for plug-in cooperation with the main bus, and the inner wall of the connecting cylinder is provided with a mounting structure used for mounting a contact finger.

[0044] The beneficial effects of the above technical solution are that the second electric connection structure is the connecting cylinder, plug-in cooperation with the main bus is facilitated, connection is simple, the mounting structure for mounting the contact finger is arranged on the inner wall of the connecting cylinder, connection is simple during assembly, and stable electric connection with the main bus is facilitated.

[0045] Further, the conductor segment is in a curved shape.

[0046] The conductor segment in a curved shape is convenient to match with the surrounding space.

[0047] Further, the conductor segment, the first electrical connection structure and the second electrical connection structure are integrally casted.

[0048] The conductor segment, the first electrical connection structure and the second electrical connection structure are integrally casted, which is convenient for processing and manufacturing, and meanwhile, there is no gap between different electrical components, so that arc discharge is avoided when the current is loaded and the current size is changed.

[0049] Further, the conductor segment is integrally formed with a first static end mounting seat for mounting a static contact of an isolation grounding switch, and is integrally formed with a second static end mounting seat for mounting a static contact of a quick grounding switch.

[0050] The conductor segment, the first electrical connection structure and the second electrical connection structure are integrally casted, which is convenient for processing and manufacturing, and meanwhile, there is no gap between different electrical components, so that arc discharge is avoided when the current is loaded and the current size is changed.

[0051] Further, the main busbar conductor is a three-phase main busbar conductor, which comprises a middle main busbar conductor and two side main busbar conductors symmetrically arranged relative to the middle main busbar conductor, and the groove openings on the two side main busbar conductors are arranged opposite to the groove openings on the middle main busbar conductor.

[0052] The conductor segment, the first electrical connection structure and the second electrical connection structure are integrally casted, which is convenient for processing and manufacturing, and meanwhile, there is no gap between different electrical components, so that arc discharge is avoided when the current is loaded and the current size is changed. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 is a sectional view of the isolation grounding switch in Embodiment 1 of the present application (only showing the main busbar conductor assembly and the insulator);

[0054] Figure 2 is a sectional view of the isolation grounding switch in Embodiment 1 of the present application;

[0055] In the figure: 1, conductor segment; 11, groove; 111, groove bottom wall; 112, groove side wall; 2, connecting cylinder; 3, connecting column; 31, cavity; 32, end plate; 4, first static end mounting seat; 5, second static end mounting seat; 6, disc insulator; 7, shell; 8, bolt. DETAILED DESCRIPTION

[0056] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application, i.e., the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0057] Therefore, the detailed description of the embodiments of the present application provided below in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative efforts fall within the scope of the present application.

[0058] It should be noted that the relationship terms such as "first" and "second" and the like that can appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any actual relationship or order between the entities or operations. Moreover, terms such as "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the statement "including a" and the like do not exclude the presence of additional identical elements in the process, method, article or device including the elements.

[0059] The features and performances of the present application are further described in detail below in combination with embodiments.

[0060] In the embodiment 1 of the isolation grounding switch in the present application, the main bus conductor includes a conductor section having grooves along the length direction, the presence of the grooves saves material and reduces the weight of the conductor. Since the transmission of current in alternating current is mainly on the surface of the conductor, by opening grooves on the main bus conductor, the conductor only has a surface part, which saves material, and at the same time, the opening of the grooves increases the surface area of the conductor, which is beneficial to heat dissipation.

[0061] Specifically, the embodiment 1 of the isolation grounding switch in the present application is as shown in Figure 2 The isolation grounding switch includes a housing 7, a disc insulator 6 and a main bus conductor assembly. The disc insulator 6 is fixed on the housing 7, and the main bus conductor assembly is fixed on the disc insulator 6.

[0062] As Figure 1 and Figure 2As shown, the main busbar conductor assembly includes three-phase main busbar conductors arranged at intervals, the main busbar conductors on both sides are symmetrically arranged relative to the main busbar conductor in the middle, each phase main busbar conductor has a conductor segment 1, the conductor segment 1 of the main busbar conductor is provided with a groove 11 extending along the length direction of the conductor segment 1, the cross section of the groove 11 is a U-shaped groove, the inner part of the U-shaped groove is a groove bottom wall 111 and a groove side wall 112. The conductor segment 1 is curved, and the bending directions of the main busbar conductor in the middle and the main busbar conductors on both sides are opposite.

[0063] The two ends of the conductor segment 1 are respectively provided with a first electrical connection structure and a second electrical connection structure. Specifically, in the embodiment, the first electrical connection structure is a connecting column 3, which is used for fixed connection with the disc insulator 6; the second electrical connection structure is a connecting cylinder 2, which is used for plug-in cooperation with the main busbar.

[0064] As shown in the figure, Figure 1 The connecting cylinder 2 is a hollow cylindrical conductor, and the inner side wall of the connecting cylinder is provided with a mounting structure for mounting a contact finger, which is a spring contact finger mounting groove in the embodiment, for mounting a spring contact finger. When it is necessary to connect the main busbar, the main busbar is inserted into the connecting cylinder, and the main busbar will be in contact with the contact finger mounted on the inner side wall of the cylinder to complete the conduction of current. The cylinder wall of the connecting cylinder is integrally formed with the groove wall of the conductor segment 1 to make the cavity of the connecting cylinder communicate with the U-shaped groove. The connecting column 3 has a cylindrical cavity 31, and has an end plate 32, and the end plate 32 is provided with a fastener mounting hole for the bolt 8 to pass through and then fixedly mount the connecting column 3 on the disc insulator 6, and the side edge of the connecting column 3 has an annular cavity wall, and the conductor segment and the connecting column are integrally cast, and the cavity of the connecting column 3 and the U-shaped groove on the conductor segment 1 are communicated. The outer surface of the connecting column is increased to facilitate the stability of the electrical connection between the conductor segment 1 and the connecting column 3, and in addition, the cavity wall can also shield the bolt after installation to avoid the bolt from producing point discharge.

[0065] As shown in the figure, Figure 1 The conductor segment 1 of the main busbar conductor is also integrally formed with a first static end mounting seat 4 and a second static end mounting seat 5, and in the embodiment, the first static end mounting seat 4 is an isolated grounding switch static contact mounting seat, and the second static end mounting seat 5 is a fast grounding switch static contact mounting seat. For the main busbar conductor in the middle, the second static end mounting seat 5 is a cylindrical boss with a mounting hole, which is formed in the groove 11 of the conductor segment and extends outward from the groove bottom wall 111 and extends out of the inner cavity of the groove 11, so that the whole boss is not shielded by the groove side wall 112. The first static end mounting seat 4 is integrally formed on the outer side of the main busbar conductor, and the first static end mounting seat 4 includes a mounting groove for accommodating a moving contact, and a contact finger groove for mounting a contact finger is formed on the groove wall of the mounting groove, and when the moving contact of the isolated grounding switch moves to the inside of the first static end mounting seat 4, the moving contact will be in contact with the contact finger to realize current conduction.

[0066] The structure of the two side main bus conductors and the middle main bus conductor is only different in the setting position of the first static terminal seat 4 and the second static terminal seat 5. Different from the middle main bus conductor, the two side main bus conductors set the first static terminal seat 4 in the cavity in the groove of the conductor segment 1, and set the second static terminal seat on the outer side of the conductor segment. In the three-phase main bus conductors of the isolation grounding switch, the opening direction of the groove 11 of the two side main bus conductors is opposite to the opening direction of the groove 11 of the middle main bus conductor, so as to avoid the tip discharge caused by the tip at the opening of the groove 11. The static terminal seats of the isolation switch on the middle main bus conductor and the two side main bus conductors are located on the same straight line and have the same height. The static terminal seats of the grounding switch on the middle main bus conductor and the two side main bus conductors are located on the same straight line and have the same height.

[0067] In the embodiment 2 of the isolation grounding switch: for the arrangement of the main bus conductors in the isolation switch, the embodiment proposes a new arrangement form. Specifically, different from the arrangement of the three-phase main bus conductors in the isolation switch in the embodiment 1, only the single-phase main bus conductor is arranged in the embodiment, and at this time, it is not necessary to consider the bending direction of the conductor segment of the single-phase main bus conductor and the direction of the groove slot.

[0068] In the embodiment 3 of the isolation grounding switch: for the connection of the conductor segment and the connecting column and the connecting cylinder, the embodiment proposes a new arrangement form. Specifically, different from the embodiment 1 in which the connecting column, the connecting cylinder and the conductor segment are integrally formed, the connecting column and the connecting cylinder are separately manufactured in the embodiment, and are fixedly connected with the conductor column through welding.

[0069] In the embodiment 4 of the isolation grounding switch: for the arrangement form of the connecting column, the embodiment proposes a new arrangement mode. Specifically, different from the embodiment 1 in which the first electric connection structure is arranged as the connecting column, the embodiment arranges the first electric connection structure as a connecting plate, and the connecting plate is fixedly connected with the disc insulator through the connecting plate.

[0070] In the embodiment 5 of the isolation grounding switch: for the arrangement form of the connecting cylinder, the embodiment proposes a new arrangement mode. Specifically, different from the embodiment 1 in which the second electric connection structure is arranged as the connecting cylinder, the embodiment arranges the second electric connection structure as a connecting plate, and the connecting plate is fixedly connected with the main bus through a fastener.

[0071] In the embodiment 6 of the isolation grounding switch: for the contact finger structure in the connecting cylinder, the embodiment proposes a new setting mode. Specifically, different from the embodiment 1 in which the spring contact finger is arranged in the mounting structure on the inner wall of the connecting cylinder, the embodiment arranges a watchband contact finger in the mounting structure, and the watchband contact finger is electrically connected with the connecting cylinder when the main bus is inserted and matched with the connecting cylinder.

[0072] In the embodiment 7 of the isolated grounding switch of the application: for the cross-sectional area of the conductor segment, the embodiment proposes a new form. Specifically, unlike the U-shaped groove on the conductor segment in the embodiment 1, the cross-sectional area of the groove in the embodiment is set to a horseshoe shape or a semicircular arc shape, an optimal arc bow shape.

[0073] The embodiment of the main bus conductor assembly in the application is the same as the structure of the main bus conductor assembly in any embodiment of the isolated grounding switch in the application, and is not repeated here.

[0074] The embodiment of the main bus conductor in the application is the same as the structure of the main bus conductor in any embodiment of the isolated grounding switch in the application, and is not repeated here.

[0075] The above is only the preferred embodiment of the application, and is not used to limit the application. The patent protection scope of the application is subject to the claims, and any equivalent structural changes made by applying the content of the specification and drawings of the application shall be included in the protection scope of the application.

Claims

1. A main busbar conductor comprising a conductor segment, a first electrical connection structure and a second electrical connection structure being arranged at both ends of the conductor segment, respectively, characterized in that: A groove extending along the length of the conductor segment is formed on the conductor segment; the first electric connection structure is a connecting column with an end plate, the connecting column has a cavity, and the cavity is in communication with the inner cavity of the groove, the end plate is used for electrically connecting with the conductor on the insulator through a fastener, the end plate has a fastener mounting hole; the second electric connection structure is a connecting cylinder used for plug-in cooperation with the main busbar, the inner wall of the connecting cylinder has a mounting structure used for mounting a contact finger; the conductor segment is in a curved shape.

2. The main busbar conductor of claim 1, characterized in that: The cross section of the groove is U-shaped.

3. The main busbar conductor according to claim 1 or 2, characterized in that: The conductor segment, the first electric connection structure and the second electric connection structure are integrally cast into shape.

4. The main busbar conductor of claim 1 or 2, characterized in that: The conductor segment is integrally formed with a first static end mounting seat used for mounting a static contact of an isolation grounding switch, and is also integrally formed with a second static end mounting seat used for mounting a static contact of a quick grounding switch.

5. A main busbar conductor assembly comprising three phase main busbar conductors arranged in a spaced apart relationship, characterized in that: Each phase main busbar conductor is the same as the main busbar conductor of any one of claims 1-4.

6. An isolated ground switch comprising a housing having a main busbar conductor disposed therein, characterized by: The main busbar conductor is the same as the main busbar conductor of any one of claims 1-4.

7. The isolated grounding switch of claim 6, wherein: The main busbar conductor is a three-phase main busbar conductor, which includes a middle main busbar conductor and two side main busbar conductors symmetrically arranged relative to the middle main busbar conductor, and the groove opening on the two side main busbar conductors is arranged opposite to the groove opening on the middle main busbar conductor.

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