High-voltage electrical connection assembly and high-voltage device

Abstract

The application discloses a high-voltage electrical connection assembly and a high-voltage device, and the high-voltage electrical connection assembly comprises a sealing module, a conductor wire core, two first shielding layers and two insulation pieces, the sealing module is provided with a through cavity; the conductor wire core is arranged in the through cavity, and both ends of the conductor wire core extend out of the through cavity; each first shielding layer is arranged at one end of the conductor wire core and connected with one end of the sealing module; each insulation piece comprises at least two insulation layers, and the at least two insulation layers are stacked on one first shielding layer and connected with one end of the sealing module. The high-voltage electrical connection assembly effectively solves the phenomenon of partial discharge caused by the adoption of small-size copper wire core diameter due to the limited space inside the high-voltage device, and simultaneously satisfies the electrical connection stability, insulation reliability and flexibility of the high-voltage device.

Description

Technical Field

[0001] This invention relates to the field of high-voltage equipment technology, and in particular to a high-voltage electrical connection assembly and a high-voltage equipment using the high-voltage electrical connection assembly. Background Technology

[0002] Electrical connection accessories for high-voltage equipment are used inside the equipment and are a crucial component in ensuring its electrical performance. Due to the limited space inside high-voltage electrical equipment, to meet installation and operational requirements, connection accessories used for internal and external electrical connections in related technologies typically use small-diameter copper wire cores and must ensure flexibility. However, small-diameter copper wire cores can cause partial discharge within the cable accessories under high voltage. Furthermore, gaps or air gaps within the connection accessories can ultimately lead to partial discharge or even breakdown. Summary of the Invention

[0003] The main objective of this invention is to provide a high-voltage electrical connection assembly and high-voltage equipment. The aim is to provide a high-voltage electrical connection assembly that ensures flexibility while having good electrical performance. This high-voltage electrical connection assembly effectively solves the problem of partial discharge caused by the use of small-diameter copper wire cores due to limited space inside the high-voltage equipment. At the same time, it is flexible while meeting the requirements of electrical connection stability and insulation reliability inside and outside the high-voltage equipment.

[0004] To achieve the above objectives, the present invention provides a high-voltage electrical connection assembly, the high-voltage electrical connection assembly comprising:

[0005] A sealing module, wherein the sealing module is provided with a through cavity;

[0006] A conductor core, wherein the conductor core passes through the cavity and both ends of the conductor core extend out of the cavity;

[0007] Two first shielding layers, each first shielding layer being disposed at one end of the conductor core and connected to one end of the sealing module; and

[0008] Two insulating components, each of which includes at least two insulating layers, the at least two insulating layers being stacked over a first shielding layer and connected to one end of the sealing module.

[0009] In one embodiment, an adhesive layer is wrapped around the connection between each of the first shielding layers and the sealing module to make the connection between the first shielding layer and the sealing module a smooth transition. The adhesive layer is a stress-relieving adhesive or an insulating filler adhesive.

[0010] In one embodiment, each of the insulating layers is wound with stress-relieving adhesive and / or insulating filler adhesive at the end connection of the sealing module to make the end of the sealing module smoothly transition to the insulating layer.

[0011] In one embodiment, each of the insulating elements includes six insulating layers, which are stacked and cover each of the first shielding layers and connected to one end of the sealing module;

[0012] And / or, the thickness of each of the insulating elements is 6mm to 10mm, and the outer diameter of the high-voltage electrical connection assembly is less than or equal to 28mm.

[0013] In one embodiment, the high-voltage electrical connection assembly further includes two second shielding layers, one end of each second shielding layer overlapping the end of the sealing module, and the other end covering a portion of the insulation layer.

[0014] In one embodiment, the high-voltage electrical connection assembly further includes two stress tubes, one end of each stress tube overlapping the end of the second shielding layer away from the sealing module, and the other end covering a portion of the insulation layer.

[0015] In one embodiment, the high-voltage electrical connection assembly further includes two sheath layers, one end of each sheath layer overlapping one end of the sealing module, and the other end covering the second shielding layer, the stress tube, and the insulation layer.

[0016] In one embodiment, the high-voltage electrical connection assembly further includes at least one shielding coating disposed on the inner wall of the cavity, the shielding coating abutting against the outer wall of the conductor core.

[0017] In one embodiment, the high-voltage electrical connection assembly further includes a protective sleeve fitted onto the outer wall of the sealing module, the protective sleeve being made of stainless steel plate.

[0018] The present invention also proposes a high-voltage device, including a device body and the aforementioned high-voltage electrical connection assembly, wherein the device body is electrically connected to the outside world through the high-voltage electrical connection assembly.

[0019] The high-voltage electrical connection assembly of this invention features a through cavity within a sealed module. This facilitates the installation of the conductor core within the cavity while allowing both ends of the conductor core to extend outwards. This cavity ensures a small conductor core size. Furthermore, by placing a first shielding layer and an insulating component at each end of the conductor core extending outwards from the cavity, the first shielding layer effectively blocks discharge from the conductor core. The insulating component comprises at least two stacked insulating layers, achieving both sealing and insulation of the conductor core while maintaining the flexibility of the high-voltage electrical connection assembly. This high-voltage electrical connection assembly effectively solves the problem of partial discharge caused by the use of small-diameter copper wire cores due to space constraints within high-voltage equipment. It also provides flexibility while meeting the requirements for stable electrical connections and reliable insulation within high-voltage equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a high-voltage electrical connection assembly in one embodiment of the present invention;

[0022] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0023] Figure 3 This is a cross-sectional schematic diagram of a high-voltage electrical connection assembly according to an embodiment of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0025] Figure 5 This is a cross-sectional schematic diagram of the sealing module and the shielding coating in one embodiment of the present invention;

[0026] Figure 6 This is an experimental diagram showing the electric field distribution at the junction of the sealing module and the first shielding layer, the insulating component, and the second shielding layer in one embodiment of the present invention.

[0027] Figure 7 This is an experimental diagram of the electric field distribution of a high-voltage electrical connection component in one embodiment of the present invention.

[0028] Explanation of icon numbers:

[0029] label name label name 100 High-voltage electrical connection components 41 Insulation layer 1 Sealing module 5 Second shielding layer 11 Through cavity 6 Stress tube 2 conductor core 7 Sheath layer 3 First shielding layer 8 Shielding coating 4 Insulating components 9 Protective sleeve

[0030] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0034] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0035] Electrical connection accessories for high-voltage equipment are used inside the equipment and are a crucial component in ensuring its electrical performance. Due to the limited space inside high-voltage electrical equipment, to meet installation and operational requirements, connection accessories used for internal and external electrical connections in related technologies typically use small-diameter copper wire cores and must ensure flexibility. However, small-diameter copper wire cores can cause partial discharge within the cable accessories under high voltage. Furthermore, gaps or air gaps within the connection accessories can ultimately lead to partial discharge or even breakdown.

[0036] Based on the above concepts and problems, this invention proposes a high-voltage electrical connection assembly 100. It is understood that the high-voltage electrical connection assembly 100 is applied inside high-voltage equipment to achieve electrical connection between the high-voltage equipment and the outside world.

[0037] Please refer to the reference. Figures 1 to 5 As shown, in this embodiment of the invention, the high-voltage electrical connection assembly 100 includes a sealing module 1, a conductor core 2, two first shielding layers 3, and two insulating components 4. The sealing module 1 has a through cavity 11; the conductor core 2 passes through the through cavity 11, and both ends of the conductor core 2 extend out of the through cavity 11; each first shielding layer 3 is disposed at one end of the conductor core 2 and connected to one end of the sealing module 1; each insulating component 4 includes at least two insulating layers 41, which are stacked and cover a first shielding layer 3 and connected to one end of the sealing module 1.

[0038] In this embodiment, the sealing module 1 is used to install and fix the conductor core 2. The sealing module 1 has tapered ends along its axial direction, which effectively prevents creepage. The sealing module 1 can be a PEEK sealing module. The conductor core 2 can be an 8AWG copper conductor. It is understood that by providing a cavity 11 within the sealing module 1, the size of the conductor core 2 can be conveniently defined using the cavity 11, ensuring a small-size structure for the conductor core 2. In this embodiment, a small-size conductor core 2 is selected, and the outer diameter of the high-voltage electrical connection assembly 100 is less than or equal to 28mm, which meets the installation requirements of high-voltage equipment with limited internal space.

[0039] Understandably, one end of the conductor core 2 passes through the cavity 11 of the sealing module 1, so that both ends of the conductor core 2 extend out of the cavity 11. In this embodiment, two first shielding layers 3 respectively cover the two ends of the conductor core 2 extending out of the cavity 11, that is, each end of the conductor core 2 extending out of the cavity 11 is covered with a first shielding layer 3, thereby using the first shielding layer 3 to shield the discharge of the conductor core 2. Specifically, the first shielding layer 3 is made of a semi-conductive conductor shielding material.

[0040] In this embodiment, to avoid gaps or air gaps between the first shielding layer 3 and the end of the sealing module 1, the first shielding layer 3 is disposed at one end of the conductor core 2 and connected to one end of the sealing module 1, thereby ensuring that the conductor core 2 is located inside. It is understood that the two first shielding layers 3 are respectively connected to both ends of the sealing module 1. Optionally, the first shielding layer 3 is a semi-conductive tube.

[0041] Understandably, the two insulating components 4 respectively cover the two first shielding layers 3 and are connected to both ends of the sealing module 1. In this embodiment, each insulating component 4 includes at least two insulating layers 41, which are stacked and cover the first shielding layer 3, and are connected to one end of the sealing module 1. Optionally, the insulating layer 41 can be a heat-shrinkable insulating tube, which adopts the nuclear power K1 grade material standard, thus meeting the requirements of development specifications, long-term product aging, radiation resistance, and electrical performance.

[0042] The high-voltage electrical connection assembly 100 of the present invention provides a through cavity 11 within the sealing module 1, which facilitates the installation of the conductor core 2 while allowing both ends of the conductor core 2 to extend out of the through cavity 11. This ensures the small size of the conductor core 2 within the through cavity 11 of the sealing module 1. Simultaneously, by providing a first shielding layer 3 and an insulating element 4 at the two ends of the conductor core 2 extending out of the through cavity 11, the first shielding layer 3 effectively shields the conductor core 2 from discharge. The insulating element 4 comprises at least two stacked insulating layers 41, achieving both sealing and insulation of the conductor core 2 while maintaining the flexibility of the high-voltage electrical connection assembly 100. The high-voltage electrical connection assembly 100 of the present invention effectively solves the problem of partial discharge caused by the use of small-diameter copper wire cores due to space constraints inside high-voltage equipment, while simultaneously providing flexibility and meeting the requirements for stable electrical connections and reliable insulation within and outside high-voltage equipment.

[0043] In one embodiment, an adhesive layer is wrapped around the connection between each first shielding layer 3 and the sealing module 1 to make the connection between the first shielding layer 3 and the sealing module 1 a smooth transition. The adhesive layer is a stress-relieving adhesive or an insulating filler adhesive.

[0044] Understandably, by wrapping an adhesive layer around the connection between the first shielding layer 3 and the sealing module 1, the adhesive layer effectively prevents breakdown and partial discharge problems at the connection between the first shielding layer 3 and the sealing module 1. At the same time, by wrapping the adhesive layer, the connection between the first shielding layer 3 and the sealing module 1 is smoothly transitioned, further preventing breakdown and partial discharge problems, and also helping to avoid damage to other components (such as the insulation layer 41) during installation.

[0045] In this embodiment, the adhesive layer can be selected as a stress-relieving adhesive or an insulating filler adhesive. It is understood that using stress-relieving adhesive or insulating filler adhesive to fill the gaps prevents surface breakdown or partial discharge caused by interlayer overlap.

[0046] In one embodiment, each insulating layer 41 is wrapped with stress-relieving adhesive and / or insulating filler at the end connection of the sealing module 1 to make the end of the sealing module 1 smoothly transition to the insulating layer 41.

[0047] Understandably, by wrapping stress-relieving adhesive around the end connection between each insulating layer 41 and the sealing module 1, breakdown and partial discharge problems at the end connection between the insulating layer 41 and the sealing module 1 are avoided. That is, the stress-relieving adhesive fills the gaps, preventing surface breakdown or partial discharge due to interlayer overlap. Simultaneously, by wrapping with stress-relieving adhesive, the end connection between each insulating layer 41 and the sealing module 1 is smoothly transitioned, further preventing breakdown and partial discharge problems, and also helping to avoid damage to other components during installation.

[0048] In one embodiment, such as Figures 2 to 4 As shown, each insulating element 4 includes six insulating layers 41, which are stacked and cover each first shielding layer 3 and connected to one end of the sealing module 1.

[0049] In this embodiment, by setting the insulating element 4 as a multilayer insulating layer 41, the multilayer insulating layer 41 is stacked and covers each first shielding layer 3, thereby effectively ensuring the flexibility of the high-voltage electrical connection assembly 100.

[0050] Understandably, the multilayer insulating layer 41 of the insulating component 4 is heat-shrinkable. The insulating layer 41 can be a heat-shrinkable insulating tube. In order to avoid partial discharge problems caused by interlayer gaps due to the processing technology of the multilayer insulating layer 41, in this embodiment, stress-relieving adhesive is wrapped around the end connection between the insulating layer 41 and the sealing module 1. The stress-relieving adhesive fills the gap, thereby preventing surface breakdown or partial discharge caused by interlayer overlap.

[0051] In one embodiment, the thickness of each insulating element 4 is 6 mm to 10 mm. It is understood that the thickness of the insulating element 4 is the sum of the thicknesses of the multiple insulating layers 41. Optionally, the thickness of the insulating element 4 is 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc., and is not limited here.

[0052] In one embodiment, such as Figures 2 to 4 As shown, the high-voltage electrical connection assembly 100 also includes two second shielding layers 5, one end of each second shielding layer 5 overlapping the end of the sealing module 1, and the other end covering part of the insulation layer 41.

[0053] In this embodiment, by setting a second shielding layer 5, one end of the second shielding layer 5 overlaps with the end of the sealing module 1, and the other end covers part of the insulation layer 41, thereby using the second shielding layer 5 to further shield the discharge of the conductor core 2 and further ensure the insulation performance.

[0054] Understandably, the two second shielding layers 5 are located at both ends of the sealing module 1, and one end of each second shielding layer 5 overlaps the end of the sealing module 1, while the other end covers part of the insulating layer 41.

[0055] In one embodiment, such as Figures 2 to 4 As shown, the high-voltage electrical connection assembly 100 also includes two stress tubes 6, one end of each stress tube 6 is connected to the end of the second shielding layer 5 away from the sealing module 1, and the other end is covered by a portion of the insulation layer 41.

[0056] In this embodiment, by setting a stress tube 6, one end of the stress tube 6 is connected to the end of the second shielding layer 5 away from the sealing module 1, and the other end is covered by a portion of the insulating layer 41, thereby using the stress tube 6 to homogenize the electric field.

[0057] Understandably, the two stress tubes 6 are located at both ends of the sealing module 1, and the two stress tubes 6 are spaced apart from the ends of the sealing module 1, and overlap the end of the second shielding layer 5 away from the sealing module 1, and cover part of the insulation layer 41.

[0058] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the high-voltage electrical connection assembly 100 also includes two sheath layers 7, one end of each sheath layer 7 is connected to one end of the sealing module 1, and the other end is covered by the second shielding layer 5, the stress tube 6 and the insulation layer 41.

[0059] In this embodiment, the two sheath layers 7 are located at both ends of the sealing module 1, and one end of each sheath layer 7 overlaps one end of the sealing module 1, while the other end covers the second shielding layer 5, the stress tube 6 and the insulating layer 41. In this way, the sheath layer 7 can protect the second shielding layer 5, the stress tube 6 and the insulating layer 41 while further ensuring the insulation performance.

[0060] In one embodiment, such as Figure 5 As shown, the high-voltage electrical connection assembly 100 also includes at least one shielding coating 8 disposed on the inner wall of the cavity 11, the shielding coating 8 abutting against the outer wall of the conductor core 2.

[0061] In this embodiment, by coating the inner wall of the cavity 11 of the sealing module 1 with a shielding coating 8, the gap between the conductor core 2 and the inner wall of the cavity 11 is sealed by the shielding coating 8, while simultaneously satisfying the electrical stress control requirements. Specifically, the shielding coating 8 is a room-temperature cross-linkable shielding material.

[0062] Understandably, the inner wall of the cavity 11 is coated with three layers of shielding coating 8, which are stacked to effectively eliminate partial discharge caused by the gap between the conductor core 2 and the inner wall of the cavity 11, so as to achieve a seamless connection between the conductor core 2 and the sealing module 1.

[0063] In one embodiment, such as Figure 1 , Figure 3 and Figure 5 As shown, the high-voltage electrical connection assembly 100 also includes a protective sleeve 9 sleeved on the outer wall of the sealing module 1, and the protective sleeve 9 is made of stainless steel plate.

[0064] In this embodiment, a protective sleeve 9 is fitted onto the outer wall of the sealing module 1, so that the protective sleeve 9 is pressed against the outer wall of the sealing module 1, thereby protecting the sealing module 1 and preventing damage to the sealing module 1. Optionally, the protective sleeve 9 is made of stainless steel plate.

[0065] The high-voltage electrical connection assembly 100 of the present invention includes a sealing module 1, a conductor core 2, a stainless steel protective sleeve 9, a first shielding layer 3, an insulating component 4, a second shielding layer 5, a stress tube 6, and a sheath layer 7. The first shielding layer 3, the insulating component 4, the second shielding layer 5, the stress tube 6, and the sheath layer 7 are disposed at both ends of the conductor core 2 extending out of the cavity 11 of the sealing module 1 and located on both sides of the sealing module 1. The electrical performance of the high-voltage electrical connection assembly 100 is achieved through a multi-layer heat shrinking process and an extrusion molding process.

[0066] Understandably, by wrapping stress-relieving adhesive or insulating filler at the connection between the first shielding layer 3, the insulating component 4, the second shielding layer 5, the stress tube 6, and the sheath layer 7 and the sealing module 1, the gaps are filled with stress-relieving adhesive or insulating filler to prevent surface breakdown or partial discharge caused by interlayer overlap.

[0067] In this embodiment, the multilayer insulation layer 41 of the insulating component 4 can be selected as a heat-shrinkable insulating tube. The heat-shrinkable insulating tube adopts the nuclear power K1 grade material standard, thereby improving the product's adaptability to higher long-term aging resistance, radiation resistance, and electrical performance requirements. Optionally, the thickness of the insulating component 4 is approximately 8mm, and stress-relieving adhesive is wrapped around the overlap between the insulating component 4 and the sealing module 1 to ensure the flexibility and excellent electrical insulation performance of the high-voltage electrical connection assembly 100.

[0068] Understandably, in order to ensure a uniform electric field distribution throughout the entire high-voltage electrical connection assembly 100, a stress tube 6 needs to be installed outside the insulating parts 4 at both ends of the stainless steel protective sleeve 9, thereby achieving the effect of homogenizing the electric field.

[0069] In this embodiment, the excessively small diameter of the conductor core 2 results in an excessively high electric field intensity on the surface of the conductor core 2, which easily triggers partial discharge. In this embodiment, by setting a first shielding layer 3 and a second shielding layer 5, the effective conductive outer diameter is increased to reduce the electric field intensity on the surface of the conductor core 2.

[0070] Furthermore, by Figure 6 and Figure 7 It can be seen that the electric field optimization of the high-voltage electrical connection assembly 100 is achieved. Due to the setting of the first shielding layer 3, the maximum electric field strength inside the high-voltage electrical connection assembly 100 is greatly reduced, which can effectively reduce partial discharge and ensure the safe and reliable operation of electrical equipment. Figure 6 As shown, under AC 30kV, the electric field distribution at the junction of the sealing module 1 with the first shielding layer 3, the insulating component 4, the second shielding layer 5, the stress tube 6, and the sheath layer 7 of the high-voltage electrical connection assembly 100 of the present invention has a maximum value of 7.1kV / mm. Figure 7As shown, the electric field distribution of the high-voltage electrical connection assembly 100 of the present invention under the operating voltage AC12kV has a maximum value of 3.01kV / mm.

[0071] The present invention also proposes a high-voltage device, which includes a device body and a high-voltage electrical connection assembly 100. The device body is electrically connected to the outside world through the high-voltage electrical connection assembly 100. The specific structure of the high-voltage electrical connection assembly 100 is as described in the foregoing embodiments. Since this high-voltage device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0072] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A high-voltage electrical connection assembly, characterized in that, The high-voltage electrical connection assembly includes: A sealing module, wherein the sealing module is provided with a through cavity; A conductor core, wherein the conductor core passes through the cavity and both ends of the conductor core extend out of the cavity; Two first shielding layers, each first shielding layer being disposed at one end of the conductor core and connected to one end of the sealing module; and Two insulating components, each of the insulating components comprising at least two insulating layers, the at least two insulating layers being stacked and covering a first shielding layer, and connected to one end of the sealing module; The high-voltage electrical connection assembly further includes two second shielding layers, one end of each second shielding layer overlapping the end of the sealing module, and the other end covering part of the insulation layer; the high-voltage electrical connection assembly further includes two stress tubes, one end of each stress tube overlapping the end of the second shielding layer away from the sealing module, and the other end covering part of the insulation layer; the high-voltage electrical connection assembly further includes two sheathing layers, one end of each sheathing layer overlapping one end of the sealing module, and the other end covering the second shielding layer, the stress tube, and the insulation layer.

2. The high-voltage electrical connection assembly as described in claim 1, characterized in that, Each of the first shielding layers is wrapped with an adhesive layer at the connection between the first shielding layer and the sealing module to make the connection between the first shielding layer and the sealing module a smooth transition. The adhesive layer is a stress-relieving adhesive or an insulating filler adhesive.

3. The high-voltage electrical connection assembly as described in claim 1, characterized in that, Each insulating layer is wrapped with stress-relieving adhesive and / or insulating filler at the end connection of the sealing module to make the end of the sealing module smoothly transition to the insulating layer.

4. The high-voltage electrical connection assembly as described in claim 1, characterized in that, Each of the insulating elements includes six insulating layers, which are stacked and cover each of the first shielding layers and connected to one end of the sealing module; And / or, the thickness of each of the insulating elements is 6mm to 10mm, and the outer diameter of the high-voltage electrical connection assembly is less than or equal to 28mm.

5. The high-voltage electrical connection assembly as described in any one of claims 1 to 4, characterized in that, The high-voltage electrical connection assembly further includes at least one shielding coating disposed on the inner wall of the cavity, the shielding coating abutting against the outer wall of the conductor core.

6. The high-voltage electrical connection assembly as described in any one of claims 1 to 4, characterized in that, The high-voltage electrical connection assembly also includes a protective sleeve fitted onto the outer wall of the sealing module, the protective sleeve being made of stainless steel plate.

7. A high-voltage device, characterized in that, It includes a main body of equipment and a high-voltage electrical connection assembly as described in any one of claims 1 to 6, wherein the main body of equipment is electrically connected to the outside world through the high-voltage electrical connection assembly.

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