CABLE MODULE, GAS-INSULATED EQUIPMENT AND METHOD FOR MANUFACTURING A CABLE MODULE

Abstract

The present disclosure relates to a cable module having a removable break feature, a gas-insulated equipment including the cable module, and a method for manufacturing the cable module. The cable module for high-voltage gas-insulated equipment having a removable electrical connection includes an enclosure (1) provided with a first opening (11) and a second opening (12), an insulator (2) provided with a conductive insert (21) and fixed to a first flange (13) of the enclosure (1) around the first opening (11), a cable terminal connector (4) penetrating a wall of the enclosure (1) and having a first end (41) positioned inside the enclosure (1) and a second end (42) positioned outside the enclosure (1) and configured to be connected to an external cable, a first conductor (31) electrically connected to the conductive insert (21), a second conductor (32) electrically connected to the first end (41) of the cable terminal connector (4), and a second conductor (32) electrically connected to the first end (41) of the cable terminal connector (4). ), and a third conductor (33) that detachably and electrically connects the first conductor (31) to the second conductor (32), and a fourth conductor (34) fixedly connected to the first end (41) of the cable terminal connector (4), wherein the third conductor (33) is configured to be movable relative to the enclosure (1) substantially along a central axis (A2) of the second opening (12) and is configured to be fixedly connected to or separated from the first conductor (31), and the second conductor (32) is configured to be movable relative to the fourth conductor (34) along a direction perpendicular to the central axis (A2) of the second opening (12), and is electrically connected to the fourth conductor (34) via a second electrical contact (62) embedded in the fourth conductor (34).

Description

[Technical field]

[0001] Technical Field The present disclosure relates to the technical field of high voltage power transmission. In particular, the present disclosure relates to a cable module having a removable electrical connection, a gas insulated device including the cable module, and a method for manufacturing the cable module. [Background technology]

[0002] background Gas-insulated equipment, such as Gas-Insulated Switchgear (GIS) and Gas-Insulated Transmission Line (GIL), are widely used in the field of high-voltage power transmission technology. More specifically, Gas-Insulated Switchgear (GIS) may be regarded as a kind of compact metal-enclosed switchgear consisting of multiple high-voltage functional modules, such as cable modules, disconnector modules, and circuit breaker modules. Among these functional modules, the cable module (also called "cable terminal module") may be regarded as a common area where external cables (also called "client cables") with corresponding cable terminal connector interfaces interface with other functional modules of the GIS.

[0003] Currently, cable modules require removable electrical connections to allow the external cable to be temporarily electrically isolated from the GIS so that the functional integrity of the GIS itself can be independently verified on-site for the client after assembly of the cable module. However, cable modules with removable electrical connections are usually very complex and difficult to implement, especially since many auxiliary components are required and the size of the cable module increases.

[0004] For example, FIG. 1 is a schematic cross-sectional view of a prior art cable module having removable electrical connections. As shown in FIG. 1 , the cable module comprises an enclosure 100 having a first opening 101 and a second opening 102; an insulator 200 and a twisted conductor 300 electrically connected to a conductive insert disposed within the insulator 200, the assembly of the insulator 200 and the twisted conductor 300 being secured to the enclosure 100 by an adapter 103 attached to a flange of the enclosure 100 around the first opening 101; a cover 104 attached to the flange of the enclosure 100 around the second opening 102; and a cable terminal connector 400 adapted to penetrate a wall of the enclosure 100 into the interior of the enclosure 100, with a first end 401 thereof removably and electrically connected to the twisted conductor 300 inside the enclosure 100 to form a detachable break structure and a second end 402 thereof being connected to an external cable outside the enclosure 100.

[0005] The disadvantages of the above technical solutions in the prior art are that in such cable modules, the material and labor costs are high due to the number of components and the complex structure, and the detachable breaking structure is difficult to assemble or disassemble in the field. More specifically, when the twisted conductor 300 needs to be separated from the cable terminal connector 400, the cover 104 needs to be removed from the enclosure 100 and a tool needs to be inserted into the enclosure 100 through the second opening 102 to carry out the disassembly operation. However, the central axis of the second opening 102 is not aligned with the connection interface between the twisted conductor 300 and the first end 401 of the cable terminal connector 400, and further, the twisted conductor 300 and the cable terminal connector 400 are connected or separated along a direction perpendicular to the insertion direction of the tool, all of which increase the difficulty of disassembling and assembling the detachable breaking structure in the field.

[0006] Furthermore, due to the size of the twisted conductor 300, the outer shape of the assembly of the insulator 200 and the twisted conductor 300 exceeds the area defined by the contour of the flange hole 105 of the adapter 103 for fixing the insulator 200, and therefore it turns out that such an adapter 103 must be used so that the insulator 200, the twisted conductor 300 and such an adapter 103 are first assembled to each other before being attached to the enclosure 100. In this way, the adapter 103 is not integrally formed with the enclosure 100, but is an auxiliary component independent of the enclosure 100, thus increasing not only the number of components but also the labor costs.

[0007] China Patent Publication No. 105846336 describes a direct connection module and a switchgear including the same. The direct connection module includes a tubular shell having two axial openings and a radial opening, an oil-gas casing having one end extending into the shell and the other end fixedly connected to one of the two axial openings, an insulator fixedly connected to the radial opening, a radial conductor disposed in the shell and having one end fixedly connected to the insulator, and an axial conductor disposed in the shell, having one end fixedly connected to the oil-gas casing and the other end connected to the other end of the radial conductor, and provided with one flexible connection.

[0008] Japanese Patent Publication No. 59155811 describes a gas-insulated switchgear including a circuit, a connecting conductor arranged in a substantially straight portion of the circuit within the equipment and detachable in a direction substantially perpendicular to the axis of the circuit, and a cable terminal device having an external connection terminal for connecting to the outside and having an opening in a gutter portion facing the protruding direction of the external connection terminal, the gas-insulated equipment and the cable being connected to each other within a tank of the cable terminal device.

[0009] DE 202014003281 A1 describes a complete set for assembling a single-phase or three-phase terminal cable device. The terminal cable device is intended to connect a distributor to a high-voltage cable. The complete set includes a basic jacket, a jacket attenuator and a lower closure element. One or three ends of the connection with the cable have a jacket. The jacket attenuator is open on both sides and is intended to be fastened to the open end of the basic jacket. The lower closure element is intended to be selectively fastened to the open end of the basic jacket or the jacket attenuator, in which one or three passage openings are achieved.

[0010] EP 3276763 A1 describes a cable box between a gas insulated switchgear (GIS) and a high voltage electric cable, the cable box having a cable box enclosure, a GIS terminal of the GIS, a cable end of an electric cable, and a conductor bar for connecting the cable end to the GIS terminal, said conductor bar being movably mounted within the cable box enclosure such that it can move between a first position connecting the cable end to the GIS terminal and a second position connecting the cable end to the cable box enclosure.

[0011] WO 2016 / 000931 describes, inter alia, a cable termination comprising three insulated cable connection elements projecting into a housing and having an inner conductor, and three phase connection parts designed as hollow bodies, which also project into the housing from the side located opposite the cable connection elements and into which one of the three cable end reinforcements can each be inserted. Each of the cable connection elements and the phase connection parts forms the corner of a triangle. These triangles are rotated relative to one another in the respective plane so that an offset is generated. Summary of the Invention [Problem to be solved by the invention]

[0012] overview The invention is defined by the features of the independent claims.

[0013] In view of the above, the present disclosure aims to provide a cable module having a detachable electrical connection that enables quick, safe and easy disassembly and assembly of its detachable break structure, thereby significantly reducing work time and labor costs. [Means for solving the problem]

[0014] To this end, a first aspect of the disclosure provides a cable module having a detachable electrical connection comprising: an enclosure provided with a first opening and a second opening; an insulator provided with a conductive insert and secured to a first flange of the enclosure around the first opening; a cable terminal connector having a first end that penetrates a wall of the enclosure and is positioned inside the enclosure and a second end that is positioned outside the enclosure and configured to be connected to an external cable; and a plurality of conductors including a first conductor electrically connected to the conductive insert, a second conductor electrically connected to the first end of the cable terminal connector, and a third conductor that detachably and electrically connects the first conductor to the second conductor, the third conductor configured to be movable relative to the enclosure substantially along a central axis of the second opening and fixedly connected to or separated from the first conductor.

[0015] Therefore, since the moving direction of the third conductor substantially coincides with the moving direction of the tool inserted from the second opening, both the disassembly and assembly operations of the detachable breaking structure are very simple, thereby significantly saving on-site work time and labor costs.

[0016] According to a preferred embodiment of the present disclosure, the third conductor is detachably connected to the first conductor via a bolt, and a central axis of the bolt coincides with a central axis of the second opening.

[0017] According to a preferred embodiment of the present disclosure, the third conductor is configured to be movable relative to the second conductor along a central axis of the second opening and is electrically connected to the fourth conductor via a first electrical contact embedded in the second conductor.

[0018] In accordance with a preferred embodiment of the present disclosure, the second conductor is provided with a passageway that passes entirely through the second conductor along a central axis of the second opening, and the third conductor is configured to be movable within the passageway in which the first electrical contact is embedded.

[0019] According to a preferred embodiment of the present disclosure, the cable module further includes a fourth conductor fixedly connected to the first end of the cable terminal connector, and the second conductor is configured to be movable relative to the fourth conductor along a direction perpendicular to the central axis of the second opening and is electrically connected to the second conductor via a second electrical contact embedded in the fourth conductor.

[0020] According to a preferred embodiment of the present disclosure, the central axis of the first opening is perpendicular to the central axis of the second opening.

[0021] According to a preferred embodiment of the present disclosure, the outer shape of the first conductor does not exceed an area defined by the outer shape of the first opening in a cross section perpendicular to the central axis of the first opening.

[0022] According to a preferred embodiment of the present disclosure, the cable module further comprises a first cover integrated with the high voltage detection sensor and secured to the second flange of the enclosure around the second opening.

[0023] According to a preferred embodiment of the present disclosure, the enclosure is further provided with a third opening, and the cable module further comprises a second cover integrated with the explosion-proof membrane and fixed to a third flange of the enclosure around the third opening.

[0024] A second aspect of the present disclosure provides a gas insulated equipment, such as a GIS or GIL, comprising a cable module having a detachable electrical connection according to the first aspect of the present disclosure.

[0025] A third aspect of the present disclosure provides a method for manufacturing a cable having a detachable electrical connection, the method including providing an enclosure having a first opening and a second opening; providing an insulator having a conductive insert; providing a first conductor electrically connected to the conductive insert and fixing the insulator and first conductor assembly to a first flange of the enclosure about the first opening; providing a cable terminal connector having a first end and a second end; providing a second conductor electrically connected to the first end of the cable terminal connector and penetrating the cable terminal connector and second conductor assembly through a wall of the enclosure such that the first end is positioned inside the enclosure and the second end is positioned outside the enclosure for connection to an external cable; and providing a third conductor removably and electrically connecting the first conductor to the second conductor, the third conductor configured to be movable relative to the enclosure substantially along a central axis of the second opening and fixedly connected to or separated from the first conductor.

[0026] According to a preferred embodiment of the present disclosure, connection or disconnection of the first conductor and the third conductor is performed by inserting a tool into the enclosure through the second opening along a central axis of the second opening.

[0027] The cable module having a detachable electrical connection according to the present disclosure has a relatively simple structure that is easy to manufacture and requires low material costs, and therefore can be widely used in various gas-insulated equipment.

[0028] In general, all terms used in the claims should be interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to "a / an / the element, device, component, means, step, etc." should be interpreted broadly as referring to at least one example of the element, device, component, means, step, etc., unless otherwise specified.

[0029] BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the present disclosure will be better understood from the following preferred embodiments which are described in detail with reference to the accompanying drawings, in which the same reference numbers indicate the same or similar components. [Brief description of the drawings]

[0030] [Figure 1] 1 is a schematic cross-sectional view of a cable module having a detachable electrical connection according to the prior art; [Diagram 2] 1 is a schematic perspective view of one embodiment of a cable module having a detachable electrical connection according to the present disclosure; [Diagram 3] 3 is a schematic cross-sectional view of the cable module shown in FIG. 2 with the removable electrical connection of the cable module assembled. [Figure 4] 3 is a schematic cross-sectional view of the cable module shown in FIG. 2 with the removable electrical connection of the cable module disassembled. [Diagram 5] FIG. 3 is a schematic exploded perspective view of the cable module shown in FIG. 2. [Figure 6] 3 is a schematic exploded cross-sectional view of the cable module shown in FIG. 2. [Figure 7] 3 is a schematic cross-sectional view of the grounding structure of the cable module shown in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] It should be noted that the drawings are not only used to explain and describe the present disclosure, but also serve to define the present disclosure, if desired.

[0032] Detailed Description The implementation and use of the embodiments are described in detail below, however, it should be understood that the specific embodiments described are intended merely to illustrate specific ways to implement and use the present disclosure, and are not intended to limit the scope of protection of the present disclosure.

[0033] It should be noted that in this specification, "cable module" refers to a type of high voltage functional module that forms part of gas insulated equipment such as gas insulated switchgear (GIS) and gas insulated transmission line (GIL), and is considered to be a common area where external cables interface with other functional modules of gas insulated equipment.

[0034] It should further be noted that the cable module shown in the figures is a three-phase cable module constituting a part of a three-phase gas-insulated equipment. That is, the cable module according to the illustrated embodiment comprises three conductive inserts evenly distributed along the circumferential direction and arranged in the insulator, and three cable terminal connectors configured to be connected to three external cables, respectively. Therefore, the removable electrical connection of the cable module described below may be applied to a removable electrical connection between any one of the three cable terminal connectors and the corresponding conductive insert.

[0035] In this specification, technical terms indicating directional relationships should not be understood as a kind of absolute concept. For example, the terms "parallel to", "perpendicular to", "coincides with", and "along" should be understood as "substantially parallel to", "substantially perpendicular to", "substantially coincides with", and "substantially along" respectively.

[0036] 2 to 6 show a preferred embodiment of a cable module having a removable electrical connection according to the present disclosure. As shown in the figures, the cable module according to the present disclosure mainly includes an enclosure 1, an insulator 2, a cable terminal connector 4, and a number of conductors 31, 32, and 33.

[0037] The enclosure 1 has a generally cylindrical shape and is provided with a first opening 11 for mounting the insulator 2 and a second opening 12 used as a tool hole. Preferably, according to the illustrated embodiment, the central axis A1 of the first opening 11 is perpendicular to the central axis A2 of the second opening 12. The insulator 2 is a pot-shaped insulator provided with a conductive insert 21 and arranged to be fixed to a first flange 13 of the enclosure 1 around the first opening 11. The cable terminal connector 4 is arranged to penetrate the wall of the enclosure 1 opposite the first opening 11 and comprises a first end 41 positioned inside the enclosure 1 and a second end 42 positioned outside the enclosure 1 and configured to be connected to an external cable.

[0038] The first conductor 31 is arranged to be fixed to the conductive insert 21, for example via a bolt, so as to be electrically connected to the conductive insert 21 to form a first assembly. Preferably, according to the illustrated embodiment, the outer shape of the first conductor 31 does not exceed the area defined by the outer shape of the first opening 11 in a cross section perpendicular to the central axis A1 of the first opening 11, i.e. in a cross section parallel to the central axis A2 of the second opening 12. Thus, the first assembly may be fixed directly to the first flange 13 of the enclosure 1 via the insulator 2, without using an auxiliary adapter.

[0039] The second conductor 32 is arranged to be electrically connected to the first end 41 of the cable terminal connector 4 to form a second assembly, and a passage 32a is provided that passes through the entire second conductor 32 along the central axis A2 of the second opening 12. Preferably, according to the illustrated embodiment, the second assembly further includes a fourth conductor 34 that is fixedly connected to the first end 41 of the cable terminal connector 4 and into which one end of the second conductor 32 is inserted. In this case, the second conductor 32 is arranged to be movable relative to the fourth conductor 34 along a direction perpendicular to the central axis A2 of the second opening 12, and is electrically connected to the fourth conductor 34 via an electrical contact 62, such as a coil spring, that is arranged around the end of the second conductor 32 and embedded in the fourth conductor 34.

[0040] The third conductor 33 is arranged to be inserted into the passage 32a of the second conductor 32 and is electrically connected to the second conductor 32 via an electrical contact 61, such as a coil spring, embedded in the passage 32a. The third conductor 33 is movable relative to the second conductor 32 in the passage 32a (and thus relative to the enclosure 1) substantially along the central axis A2 of the second opening 12, and is fixedly connected to or separated from the first conductor 31, thereby achieving a detachable electrical connection between the first conductor 31 and the second conductor 32, i.e., a detachable electrical connection between the first assembly and the second assembly.

[0041] It is considered that the movable direction of the third conductor 33 (i.e., the extension direction of the passage 32a) does not necessarily have to be absolutely along the central axis A2 of the second opening 12. In practice, the movable direction of the third conductor 33 may be parallel to but slightly spaced from the central axis A2 of the second opening 12, or may be slightly inclined with respect to the central axis A2 of the second opening 12, as long as the third conductor 33 can pass through the second opening 12.

[0042] Preferably, according to the illustrated embodiment, the third conductor 33 is detachably connected to the first conductor 31 via a bolt 5 that penetrates the third conductor 33 and is screwed into the first conductor 31, and the central axis of the bolt 5 coincides with the central axis A2 of the second opening 12. That is, when the first conductor 31 needs to be electrically connected to the second conductor 32, a tool such as a screw tightening tool is inserted into the enclosure 1 from the second opening 12 along the central axis A2 of the second opening 12 to reliably and fixedly connect the third conductor 33 to the first conductor 31 by tightening the bolt 5. Similarly, when the first conductor 31 needs to be electrically insulated from the second conductor 32, a tool such as a screw tightening tool is inserted into the enclosure 1 from the second opening 12 along the central axis A2 of the second opening 12 to separate the third conductor 33 from the first conductor 31 by loosening the bolt 5.

[0043] During assembly of the cable module, first a first assembly formed by the insulator 2 and the first conductor 31 is fixed directly to the first flange 13 of the enclosure 1 around the first opening 11 so that the first conductor 31 is positioned in a predetermined position inside the enclosure 1, then a second assembly formed by the cable terminal connector 4, the second conductor 32 and optionally the fourth conductor 34 penetrates the wall of the enclosure 1 opposite the first opening 11 so that the first end 41 of the cable terminal connector 4, the second conductor 32 and the fourth conductor 34 are positioned in a predetermined position inside the enclosure 1, and finally the third conductor 33 is positioned by a tool penetrating the second opening 12 so as to detachably and electrically connect the first assembly to the second assembly. It may be understood that the third conductor 33 may be pre-inserted into the passage 32a of the second conductor 32 before the second assembly is inserted into the enclosure 1, or the third conductor 33 may be inserted into the passage 32a of the second conductor 32 from the second opening 12 by a tool after the second assembly is inserted into the enclosure 1.

[0044] It can be seen that the cable module with detachable electrical connections according to the present disclosure has a relatively simple structure that is easy to manufacture and has low material costs. Moreover, the cable module allows for quick, safe and convenient disassembly and assembly of its detachable break structure, thereby significantly reducing on-site work time and labor costs.

[0045] Furthermore, due to the mobility of the third conductor 33 relative to the second conductor 32 along the direction of the central axis A2 of the second opening 12, and the mobility of the second conductor 32 relative to the optional fourth conductor 34 along a direction perpendicular to the central axis A2 of the second opening 12, such a detachable breaking structure may compensate for misalignment caused by manufacturing tolerances in both two directions or thermal expansion / contraction during operation, thereby effectively avoiding damage to these components and extending the life of the cable module.

[0046] Furthermore, according to the illustrated embodiment, the cable module further comprises a first cover 7 integrated with a high voltage detection sensor and fixed to the second flange 14 of the enclosure 1 around the second opening 12. Alternatively, the first cover 7 may further be integrated with an inflation port 71 and a density meter 72. In a variant, the first cover 7 may be used only to cover the second opening 12 without being integrated with other functions.

[0047] Furthermore, according to the embodiment shown, the enclosure 1 is further provided with a third opening 15, and the cable module further comprises a second cover 8 integrated with an explosion-proof membrane and fixed to a third flange 16 of the enclosure 1 around the third opening 15. Alternatively, the second cover 8 may further be integrated with a moisture absorbent.

[0048] 7 is a schematic cross-sectional view of the grounding structure of the cable module. As shown in FIG. 7, when the second opening 12 is opened to take out the third conductor 33, the grounding on the cable side may be conveniently achieved by a substantially T-shaped metal piece 9 partially inserted into the passage 32a of the second conductor 32 and fixed to the second flange 14 of the enclosure 1.

[0049] The technical contents and features of the present disclosure have been disclosed above. However, under the creative ideas of the present disclosure, those skilled in the art may make various modifications and improvements to the concepts disclosed above, and all of these modifications and improvements belong to the protection scope of the present disclosure. The above description of the embodiments is illustrative rather than restrictive, and the protection scope of the present disclosure is defined by the appended claims.

Claims

1. A cable module for high voltage gas insulated equipment having a removable electrical connection, comprising: An enclosure (1) provided with a first opening (11) and a second opening (12); an insulator (2) provided with a conductive insert (21) and secured to a first flange (13) of the enclosure (1) around the first opening (11); a cable terminal connector (4) that penetrates the wall of the enclosure (1), the cable terminal connector (4) having a first end (41) positioned inside the enclosure (1) and a second end (42) positioned outside the enclosure (1) and configured to be connected to an external cable; a plurality of conductors including a first conductor (31) electrically connected to the conductive insert (21), a second conductor (32) electrically connected to the first end (41) of the cable terminal connector (4), and a third conductor (33) detachably and electrically connecting the first conductor (31) to the second conductor (32); a fourth conductor (34) fixedly connected to the first end (41) of the cable terminal connector (4); Equipped with the third conductor (33) is configured to be movable relative to the enclosure (1) substantially along a central axis (A2) of the second opening (12) and is fixedly connected to or separated from the first conductor (31); and The second conductor (32) is configured to be movable relative to the fourth conductor (34) along a direction perpendicular to the central axis (A2) of the second opening (12), and is electrically connected to the fourth conductor (34) via a second electrical contact (62) embedded in the fourth conductor (34).

2. A cable module as claimed in any preceding claim, wherein the third conductor (33) is detachably connected to the first conductor (31) via a bolt (5), the central axis of the bolt coinciding with the central axis (A2) of the second opening (12).

3. 2. A cable module as described in claim 1, wherein the third conductor (33) is configured to be movable relative to the second conductor (32) along the central axis (A2) of the second opening (12) and is electrically connected to the second conductor (32) via a first electrical contact (61) embedded in the second conductor (32).

4. A cable module as claimed in any preceding claim, wherein the second conductor (32) is provided with a passage (32a) penetrating the entire second conductor (32) along the central axis (A2) of the second opening (12), and the third conductor (33) is configured to be movable within the passage (32a) in which the first electrical contact (61) is embedded.

5. 10. A cable module according to any one of the preceding claims, wherein the central axis (A1) of the first opening (11) is perpendicular to the central axis (A2) of the second opening (12).

6. A cable module as claimed in any one of the first four claims, wherein the outer diameter of the first conductor (31) does not exceed an area defined by the contour of the first opening (11) on a cross section perpendicular to the central axis (A1) of the first opening (11).

7. A cable module as claimed in any one of the first four claims, further comprising a first cover (7) integrated with a high voltage detection sensor and fixed to a second flange (14) of the enclosure (1) around the second opening (12).

8. A cable module as claimed in any one of claims 1 to 5, wherein the enclosure (1) is further provided with a third opening (15), and the cable module further comprises a second cover (8) integrated with an explosion-proof membrane and fixed to a third flange (16) of the enclosure (1) around the third opening (15).

9. High voltage gas insulated equipment comprising a cable module having a detachable electrical connection according to any one of the preceding claims.

10. 1. A method for manufacturing a cable module for high voltage gas insulated equipment having removable electrical connections, comprising the steps of: Providing an enclosure (1) having a first opening (11) and a second opening (12); Providing an insulator (2) having a conductive insert (21); providing a first conductor (31) electrically connected to the conductive insert (21) and fixing an assembly of the insulator (2) and the first conductor (31) to a first flange (13) of the enclosure (1) around the first opening (11); Providing a cable terminal connector (4) having a first end (41) and a second end (42); providing a second conductor (32) electrically connected to the first end (41) of the cable terminal connector (4) and penetrating the assembly of the cable terminal connector (4) and the second conductor (32) through a wall of the enclosure (1) such that the first end (41) is positioned inside the enclosure (1) and the second end (42) is positioned outside the enclosure (1) for connection to an external cable; providing a third conductor (33) for detachably and electrically connecting the first conductor (31) to the second conductor (32), the third conductor (33) being configured to be movable relative to the enclosure (1) substantially along a central axis (A2) of the second opening (12) and fixedly connected to or separated from the first conductor (31); providing a fourth conductor (34) fixedly connected to the first end (41) of the cable terminal connector (4), wherein the second conductor (32) is configured to be movable relative to the fourth conductor (34) along a direction perpendicular to the central axis (A2) of the second opening (12) and is electrically connected to the fourth conductor (34) via a second electrical contact (62) embedded in the fourth conductor (34); A method comprising:

11. 10. The method according to claim 9, wherein the third conductor (33) is detachably connected to the first conductor (31) via a bolt (5), the central axis of the bolt coinciding with the central axis (A2) of the second opening (12).

12. 10. The method according to any preceding claim, wherein the connection or disconnection of the first conductor (31) and the third conductor (33) is performed by inserting a tool into the enclosure (1) through the second opening (12) along the central axis (A2) of the second opening (12).

13. 11. The method according to claim 10, wherein the third conductor (33) is configured to be movable relative to the second conductor (32) along the central axis (A2) of the second opening (12) and is electrically connected to the second conductor (32) via a first electrical contact (61) embedded in the second conductor (32).

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