阅读说明：本技术 用于高压电气设备端子的屏蔽件及用于操作屏蔽件的方法 (Shield for a terminal of a high-voltage electrical device and method for operating a shield ) 是由 T·加尔加诺 D·维拉诺 K·弗雷 F·迈耶 于 2019-08-28 设计创作，主要内容包括：本公开的一方面提供了一种用于高压电气设备(200)的端子(206)的屏蔽件(300),该屏蔽件包括具有至少一个轴向开口(304)和至少一个侧向开口(305)的第一屏蔽件元件(301),以及至少一个第二屏蔽件元件(302、303),其中至少一个第二屏蔽件元件(302、303)能够在第一屏蔽位置和第二屏蔽位置之间运动,用于选择性地打开和关闭至少一个轴向开口(304)和至少一个第一侧向开口(305)中的至少一者。其他方面提供了一种包括根据以上方面的屏蔽件(300)的高压电气套管(200),以及一种包括所述高压电气套管(200)的变压器(100)。又另外的方面提供了一种用于安装具有根据以上方面的屏蔽件的高压套管的方法(400)。(An aspect of the present disclosure provides a shield (300) for a terminal (206) of a high voltage electrical device (200), the shield comprising a first shield element (301) having at least one axial opening (304) and at least one lateral opening (305), and at least one second shield element (302, 303), wherein the at least one second shield element (302, 303) is movable between a first shielding position and a second shielding position for selectively opening and closing at least one of the at least one axial opening (304) and the at least one first lateral opening (305). Further aspects provide a high voltage electrical bushing (200) comprising a shield (300) according to the above aspects, and a transformer (100) comprising the high voltage electrical bushing (200). Still further aspects provide a method (400) for mounting a high voltage bushing having a shield according to the above aspect.)

1. A shield (300) for a terminal (206) of an electrical high voltage apparatus (200), the shield comprising:

a first shield element (301) having at least one axial opening (304) and at least one first lateral opening (305); and

at least one second shield element (302, 303);

wherein the at least one second shield element (302, 303) is positionable such that the at least one axial opening (304) and/or the at least one first lateral opening (305) is in an open state or a closed state.

2. The shielding (300) according to claim 1, wherein the high voltage electrical device (200) is a high voltage bushing (200), in particular a high voltage bushing (200) for a transformer (100).

3. The shield (300) according to any one of claims 1 and 2, wherein the at least one second shield element is a lateral shield element (302) configured for opening or closing the at least one first lateral opening (305), and the first shield element (301) and the lateral shield element (302) are arranged concentrically to each other.

4. The shield (300) according to claim 3, wherein the at least one first lateral opening (305) is changed between the open state and the closed state by a relative rotation between the first shield element (301) and the lateral shield element (302).

5. The shield (300) according to any one of claims 3 and 4, wherein the lateral shield element (302) comprises at least one second lateral opening (306), wherein the at least one first lateral opening (305) is in an open state when the at least one first lateral opening (305) is aligned with the at least one second lateral opening (306), and wherein the at least one first lateral opening (305) is in a closed state when the at least one first lateral opening (305) is misaligned with the at least one second lateral opening (306).

6. The shield (300) according to any of claims 3-5, wherein the first shield element (301) comprises at least two first lateral openings (305) and the lateral shield element (302) is positionable such that a first of the at least two first lateral openings (305) is in an open state and a second of the at least two first lateral openings (305) is in a closed state.

7. The shield (300) according to any of claims 1 to 6, wherein the at least one second shield element is an axial shield element (303) configured for opening or closing the at least one axial opening (304).

8. The shield (300) according to any of claims 1-7, wherein the shield (300) has the same potential as the terminal (206).

9. A high voltage electrical bushing (200) comprising a shield (300) according to any of claims 1-8.

10. The high voltage electrical bushing (200) of claim 9, wherein at least one electrical interconnect (103) is mountable to the terminal (206) such that the at least one electrical interconnect (103) extends in a lateral or axial direction.

11. A transformer (100) comprising at least one high voltage electrical bushing (200) according to any one of claims 9 and 10.

12. A method (400) of installing a high voltage bushing (200) having a shield (300) according to any of claims 1-8, the method (400) comprising:

-mounting (402) the high voltage bushing (200);

configuring (403) the at least one axial opening (304) and/or the at least one first lateral opening (305) in an open state or a closed state; and

terminating (404) the high voltage bushing (200).

13. The method (400) according to claim 12, wherein the high voltage bushing (200) has a shield (300) according to any of claims 5-9, wherein configuring (403) the at least one first lateral opening (305) comprises a relative rotation between the first shield element (301) and the lateral shield element (302).

14. The method (400) according to any of claims 12 and 13, wherein the high voltage bushing (200) has a shield (300) according to any of claims 7 and 8, wherein configuring (403) the at least one axial opening (304) comprises mounting or removing the axial shield element (303).

15. The method (400) according to any of claims 12 to 14, wherein terminating (404) the high voltage bushing (200) comprises mounting at least one electrical interconnect (103) to the terminal (206) such that the at least one electrical interconnect (103) passes through the at least one axial opening (304) and/or the at least one first lateral opening (305).

Technical Field

Embodiments of the present disclosure generally relate to shields for terminals of high voltage electrical equipment, in particular high voltage electrical bushings for transformers. In particular, embodiments of the present disclosure relate to shields for terminals having at least one lateral opening and at least one axial opening, wherein the shields can be configured such that the openings can be selectively opened or closed. More particularly, embodiments of the present disclosure relate to a method for mounting a high voltage bushing having a shield according to the above aspect.

Background

High voltage transformers typically include a plurality of electrical bushings disposed therein to facilitate isolating conductors passing through a barrier, such as a grounded transformer housing. An electrical bushing for high voltage applications may include a dielectric component and a means for mounting the bushing to a mounting surface. At each end of the electrical bushing, a terminal is provided for mounting at least one electrical interconnect onto the electrical bushing. At least one electrical interconnect may be mounted to the terminal such that the electrical interconnect extends axially or laterally from the terminal. For example, a high voltage electrical bushing may be installed to transfer a conductor from a transformer on one side of the housing to a cable box on the other side of the housing. The first electrical interconnect may be mounted axially to a terminal on the transformer side, and the second electrical interconnect may be mounted laterally to a terminal on the cable box side.

The terminals of high voltage electrical bushings can produce very strong electric fields. Therefore, high voltage electrical bushings require a shield around the terminal. When it is desired to mount the electrical interconnect axially or laterally, the shield must provide an opening for the electrical interconnect to pass through when the electrical interconnect is mounted to the terminal. However, the openings in the shield compromise the electrical shielding performance of the shield. Thus, if the opening for the electrical interconnect is not in use, it should preferably be closed to provide sufficient electrical shielding, as the local gradient of the generated electric field may be too large in the boundary region where the opening is present. Because the mounting of the electrical interconnects may vary depending on the assembly, there is a need for a shield that is adapted to provide the required opening for the electrical interconnects while still providing electrical shielding.

One solution is to fit a particular shield with a fixed configuration depending on which openings are required. However, this option has the disadvantage of providing different shields in different configurations. The modularity of the components is important to reduce manufacturing and assembly costs, and therefore providing different shields in different configurations is undesirable. Further, during assembly of the electrical bushing, a specific shield having the desired configuration must be selected and installed, which increases assembly time. In addition, the bushing and/or transformer may need to be tested or inspected, requiring that another shield in the test configuration be different from the shield in the final configuration. The shield in the test configuration needs to be arranged for testing and then removed and replaced with the shield in the final configuration when testing is complete. In view of this, it is desirable to overcome at least some of the problems in the prior art.

Disclosure of Invention

One aspect of the present disclosure provides a shield 300 for a terminal 206 of a high voltage electrical device 200. The shield 300 comprises a first shield element 301 having at least one axial opening 304 and at least one lateral opening 305, and at least one second shield element 302, 303, wherein the at least one second shield element 302, 303 is movable between a first shielding position and a second shielding position for selectively opening and closing at least one of the at least one axial opening 304 and the at least one first lateral opening 305.

Further aspects of the present disclosure provide a high voltage electrical bushing 200 comprising a shield 300 according to the above aspect.

Still further aspects of the present disclosure provide a transformer 100 comprising at least one high voltage electrical bushing 200 according to the above aspects.

Still further aspects of the present disclosure provide a method 400 for mounting a high voltage bushing having a shield according to the above aspect. The method comprises mounting 402 the high voltage bushing, configuring 403 the at least one axial opening and/or the at least one first lateral opening in an open state or in a closed state, and terminating 404 the high voltage bushing.

Embodiments described in this disclosure allow the shield to be configurable in more than one configuration. Thus, either the lateral or axial openings in the shield can be opened or closed, depending on whether electrical interconnects are required to pass through these openings. Further, the shield may thus be in a single modular form, the shield may be configured for multiple configurations of electrical interconnects. Further, the shield of the present disclosure may be mounted to the electrical bushing prior to assembly and configured to a desired configuration during assembly, thereby providing a simplified and efficient assembly process.

Further advantages, features, aspects and details, which may be combined with the embodiments described herein, are apparent from the dependent claims, the claim combinations, the description and the drawings.

Drawings

The details will now be described with reference to the accompanying drawings, in which

Fig. 1 is a schematic cross-sectional view of a transformer with an electrical bushing according to an embodiment of the present disclosure;

fig. 2 is a schematic cross-sectional view of a shield for a terminal of a high voltage device according to an embodiment of the present disclosure;

fig. 3A-3B are schematic cross-sectional views of shields for terminals of high voltage devices according to embodiments of the present disclosure;

fig. 4A-4C are schematic cross-sectional views of shields for terminals of high voltage devices according to embodiments of the present disclosure; and

fig. 5 is a flow chart of a method of installing a high voltage bushing according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the various embodiments, one or more examples of which are illustrated in each figure. Each example is provided by way of illustration and is not meant as a limitation. For instance, features illustrated or described as part of one embodiment, can be used on or in conjunction with any other embodiment to yield yet a further embodiment. The present disclosure is intended to encompass such modifications and variations.

In the following description of the drawings, the same reference numerals refer to the same or similar parts. In general, only the differences with respect to the various embodiments are described. Unless otherwise indicated, descriptions of parts or aspects in one embodiment may also apply to corresponding parts or aspects in another embodiment.

Fig. 1 schematically shows a cross-sectional view of a transformer 100 according to an embodiment of the present disclosure. According to any embodiment described herein, the transformer comprises at least one electrical bushing 200. The transformer may be, for example, a medium or high voltage transformer, in particular a high voltage transformer. In the context of the present disclosure, the term "medium voltage" may refer to a voltage of at least 1kV and up to 52 kV. Further, in the context of the present disclosure, the term "high voltage" may refer to a voltage of at least 52 kV.

The transformer 100 may for example comprise a first region 101 and a second region 102. The first region 101 and the second region 102 may be separated by a mounting surface 105. At least one electrical bushing 200 may be mounted to mounting surface 105 such that conductors 205 of at least one electrical bushing 200 may pass through mounting surface 105. In other words, at least one electrical bushing 200 may be installed in the transformer such that the conductor 205 may pass from the first region 101 to the second region 102. At least one electrical bushing 200 may include a body member 204 through which a conductor 205 passes. The body member 204 may be filled with an insulating medium, such as oil. The second region 102 may be filled with an isolation medium, such as oil, wherein the at least one electrical bushing 200 is partially immersed in the isolation medium.

As exemplarily shown in fig. 1, at least one electrical bushing 200 is provided with an upper terminal 206 and a lower terminal 207. The upper terminal 206 and the lower terminal 207 are electrically connected to the conductor 205. The transformer 100 may also include at least one electrical interconnect 103, 104 mounted to at least one of the upper terminal 206 and the lower terminal 207. The at least one electrical interconnect 103, 104 may comprise, for example, a conductive bar interconnect or a cable interconnect. The electrical interconnects 103, 104 may be solid or flexible.

In the example shown in fig. 1, the transformer 100 includes lateral electrical interconnects 103 and axial electrical interconnects 104. The lateral electrical interconnect 103 is shown mounted to the upper terminal 206 such that the lateral electrical interconnect 103 extends in a lateral direction with respect to the at least one electrical bushing 200. The axial electrical interconnect 104 is shown mounted to the lower terminal 207 such that the axial electrical interconnect 104 extends in an axial direction relative to the at least one electrical bushing 200. The configuration of electrical interconnects 103, 104 shown in fig. 1 is provided as an example only, and transformer 100 may have electrical bushings 200 and any combination of electrical interconnects 103, 104 attached thereto. For example, the transformer 100 may include an axial electrical interconnect mounted to the upper terminal 206 and a lateral electrical interconnect mounted to the lower terminal 207. As another example, the transformer 100 may include two lateral electrical interconnects each mounted to the upper terminal 206 and the lower terminal 207, respectively.

The at least one electrical bushing 200 comprises at least one shield for shielding the upper terminal 206 and the lower terminal 207. In this example, an upper shield 201 is provided for shielding the upper terminal 206, and a lower shield 202 is provided for shielding the lower terminal 207. As can be clearly seen from this example, the upper shield 201 and the lower shield 202 have different opening configurations for each electrical interconnect due to the configuration of the lateral electrical interconnect 103 and the axial electrical interconnect 104. In this example, the upper shield 201 is provided with a lateral opening for the lateral electrical interconnect 103 to pass through, while the lower shield 202 is provided with an axial opening for the axial electrical interconnect 104 to pass through.

The modularity of the parts has advantageous properties, since the modular parts allow to minimize the number of different parts, thus reducing the costs of manufacturing and installation. However, simply providing the same number of openings at the same position of the upper shield 201 and the lower shield 202 may not be possible due to the high electric field gradient generated in the local area of the openings. For example, in the transformer of fig. 1, the upper shield 201 and the lower shield 202 may each be provided with an axial opening and a lateral opening, so that the same parts may be provided to shield the upper terminal 206 and the lower terminal 207, respectively. However, in this example, the upper shield 201 does not require an axial opening and the lower shield 202 does not require a lateral opening. Thus, the electrical shielding performance of such modular parts may be compromised.

Referring now to fig. 2, an aspect of the present disclosure provides a shield 300 for a terminal 206 of a high voltage electrical device 200. The shield 300 comprises a first shield element 301 having at least one axial opening 304 and at least one first lateral opening 305, and at least one second shield element 302, 303, wherein the at least one second shield element 302, 303 is movable between a first shielding position and a second shielding position for selectively opening and closing at least one of the at least one axial opening 304 and the at least one first lateral opening 305.

The first shield element 301 comprises at least one axial opening 304. At least one axial opening 304 is provided such that the electrical interconnect 103 may be attached to the terminal 206 such that the electrical interconnect 103 extends in an axial direction, i.e. in the direction of the longitudinal axis R, such that the electrical interconnect 103 passes through the at least one axial opening 304. At least one axial opening 304 may also be provided, such that the terminal 206 may pass through the axial opening, e.g. at least one axial opening is provided on an axial end of the first shield element 301 corresponding to the side where the electrical bushing 200 is provided.

The first shield element 301 further comprises at least one first lateral opening 305. At least one first lateral opening 305 is provided such that the electrical interconnect 103 may be attached to the terminal 206 such that the electrical interconnect 103 extends in a lateral direction, i.e. in a direction substantially perpendicular to the longitudinal axis R, such that the electrical interconnect 103 passes through the at least one first lateral opening 305.

The at least one axial opening 304 and the at least one first lateral opening 305 may be configured such that the openings 304, 305 are in an open state or a closed state. In the context of the present disclosure, the term "open state" refers to a configuration in which the openings 304, 305 are substantially uncovered. For example, the "open state" may refer to a configuration in which 80% or more of the area of the opening 304, 305 is uncovered. Similarly, "closed state" may refer to a configuration in which 80% or more of the opening 304, 305 is covered. The "closed state" may thus comprise a configuration in which a certain part of the area of the openings 304, 305, in which the openings 304, 305 have, is uncovered, in other words a configuration in which the openings 304, 305 are in a "substantially closed state". The openings 304, 305 in the closed state are substantially electrically closed, whereby the terminals 206 are electrically shielded while still allowing partial opening, in which case, for example, fluid may flow therethrough for cooling purposes, or in which case, manufacturing tolerances require gaps between components.

As exemplarily shown in fig. 2, one first lateral opening 305 on the left side of fig. 2 is shown in an open state, whereby more than 80% of the area of the first lateral opening 305 is uncovered. The other first lateral opening 305 on the right side of fig. 2 is shown in a closed state, whereby more than 80% of the area of the first lateral opening 305 is covered. One axial opening 304 at the top side of fig. 2 is in a closed state, or in this case, in a substantially closed state, whereby more than 80% of the area of the axial opening 304 is covered.

The shield 300 further comprises at least one second shield element 302, 303. The second shield element 302, 303 may be positioned such that the at least one axial opening 304 and/or the at least one first lateral opening 305 are in an open state or a closed state. As exemplarily shown in fig. 2, the second shielding element 302, 303 is shown in a position such that one first lateral opening 305 on the left side of fig. 2 is in an open state, another first lateral opening 305 on the right side of fig. 2 is in a closed state, and one axial opening 304 is in a substantially closed state.

The first and second shield elements 301, 302 are arranged such that the first and second shield elements 301, 302 substantially surround the terminal 206. In the context of the present disclosure, the term "substantially surrounding" may denote that the combination of the first and second shield elements 301, 302 surrounds the terminal 206 around the entire circumference of the first and second shield elements 301, 302 except for the area providing the at least one axial opening 304 and the at least one lateral opening 305 in the open state. The first shield element 301 and the second shield element 302 may be fastened to each other using fasteners 307. The fastener 307 may be removable such that the first shield element 301 and the second shield element 302 may be moved from a first position to a second position.

As exemplarily shown in fig. 1 and 2, the high voltage electrical device is shown as an electrical bushing 200 having at least one terminal 206. However, the present disclosure is not limited to electrical bushing 200. The high voltage electrical device may be any high voltage electrical device having a terminal requiring a shield. For example, the high voltage electrical device may be any high voltage power distribution component including, but not limited to, circuit breakers, arresters, relays, bus bars, and the like.

The first and second shield elements 301, 302, 303 may comprise an electrically conductive material. For example, at least one of the first shield element 301 and the second shield element 302 may be formed from the group consisting of, but not limited to, aluminum, steel, copper, and alloys thereof. The first and second shield elements 301, 302, 303 may be coated with a non-metallic coating (e.g., an epoxy layer) to reduce the effects of surface imperfections or protrusions. Preferably, the first and second shield elements 301, 302, 303 may be formed of the same material, e.g. to prevent galvanic corrosion between different metals. In some applications, the first and second shield elements 301, 302, 303 may be partially or fully submerged in an isolation medium (such as oil). Therefore, the first and second shield elements 301, 302, 303 should be formed of a material that is non-reactive to the isolation medium and does not degrade when immersed in the isolation medium.

According to embodiments, which may be combined with other embodiments described herein, the shield 300 may be at the same potential as the terminal 206. In the context of the present disclosure, the term "same potential" may refer to substantially the same potential. For example, terminal 206 may be at a voltage of 100kV, while shield 300 may be at a voltage of approximately 100kV (e.g., 98 kV). Preferably, the shield 300 may be at a voltage within 10% of the voltage of the terminal 206. In particular, the shield 300 may be electrically connected to any of the terminal 206, the conductor 205, or the electrical interconnect 103. Due to the substantially same electrical potential of the terminal 206 and the shield 300, the terminal 206 is electrically shielded such that the terminal 206 is not or very little electrically stressed despite the terminal 206 being at a high electrical potential.

Reference will now be made to fig. 3A and 3B, which illustrate cross-sectional top views of a shield 300 according to embodiments described herein. In particular, fig. 3A and 3B show cross-sectional views through section line B-B as shown in fig. 2. For clarity, the electrical interconnects 103 are not shown in fig. 3A and 3B.

According to embodiments, which can be combined with other embodiments described herein, the at least one second shield element 302 may be a lateral shield element configured for opening or closing the at least one first lateral opening 304, and the first shield element 301 and the lateral shield element 302 are arranged concentrically to each other. The first shield element 301 and the lateral shield element 302 may be rotationally symmetric about a common axis (e.g. the longitudinal axis R). In particular, the first shield element 301 and the lateral shield element 302 may have a cylindrical shape. Alternatively, the first shield element 301 and the lateral shield element 302 may have a spherical shape or a partially spherical shape.

As exemplarily shown in fig. 2, 3A and 3B, the first shield element 301 may be arranged such that the first shield element 301 is an outer shield and the second shield element 302 may be arranged such that the second shield element 302 is an inner shield. However, the present disclosure is not limited to such an arrangement. For example, the first shield element 301 and the second shield element 302 may be arranged such that the first shield element 301 is an inner shield and the second shield element 302 is an outer shield.

The movement between the first shielding position and the second shielding position may be achieved by a relative rotation between the first shield element 301 and the lateral shield element 302. Since the first shield element 301 and the lateral shield element 302 may be arranged concentrically to each other, the first shield element 301 and the lateral shield element 302 may be rotated inside each other from a first shielding position to a second shielding position. In the example shown in fig. 3A and 3B, the first shield element 301 is held in a stationary position while the lateral shield element 302 rotates about the longitudinal axis R. However, the present disclosure is not limited to such an arrangement. For example, the lateral shield element 302 may be held in a stationary position while the first shield element 301 rotates around the longitudinal axis R.

According to embodiments, which can be combined with other embodiments described herein, the lateral shield element 302 can further comprise at least one second lateral opening 306, wherein the at least one first lateral opening 305 is in an open state when the at least one first lateral opening 305 is aligned with the at least one second lateral opening 306, and wherein the at least one first lateral opening 305 is in a closed state when the at least one first lateral opening 305 is misaligned with the at least one second lateral opening 306.

The at least one second lateral opening 306 may be a portion 306 of the lateral shield element that has been removed. The at least one second lateral opening 306 may correspond to the size and/or shape of the at least one first lateral opening 305. Alternatively, the at least one second lateral opening 306 may be larger than the at least one first lateral opening 305. When the at least one first lateral opening 305 and the at least one second lateral opening 306 are aligned with each other, the openings are thus in an open state. The term "aligned" in the context of the present disclosure refers to a substantial overlap of respective areas of the at least one first lateral opening 305 and the at least one second lateral opening 306. Similarly, when the at least one first lateral opening 305 and the at least one second lateral opening 306 are not aligned with each other, the openings are thus in a closed state. The term "misalignment" in the context of the present disclosure refers to a substantial non-overlap of respective areas of the at least one first lateral opening 305 and the at least one second lateral opening 306.

As exemplarily shown in fig. 3A and 3B, the first shield element 301 comprises two first lateral openings 305 arranged at substantially opposite sides of the first shield element 301. Lateral shield member 302 includes a second lateral opening 306. Fig. 3A shows a first configuration in which the second lateral opening 306 is not aligned with the two first lateral openings 305. In this configuration, two of the first lateral openings 305 are in a closed state.

Rotating the lateral shield element 302 about the longitudinal axis R allows the configuration of the shield 300 to be changed. For example, fig. 3B shows a second configuration in which the lateral shield element 302 has been rotated approximately 90 ° in a counterclockwise direction about the longitudinal axis R. In this configuration, one of the two first lateral openings 305 is now aligned with the second lateral opening 306 such that one of the two first lateral openings 305 is in an open state. The other of the two first lateral openings 305 remains misaligned with the second lateral opening 306 such that the other of the two first lateral openings 305 remains in a closed state. In the configuration shown in fig. 3B, the electrical interconnect 103 may now be attached to the terminal 206 such that it extends laterally through one of the two first lateral openings 305.

Thus, the lateral shield element 302 may alternatively be rotated about 90 ° in a clockwise direction about the longitudinal axis R from the position shown in fig. 3A, such that the other of the two lateral openings 305 is changed to the open state.

Reference will now be made to fig. 4A, 4B, and 4C, which illustrate cross-sectional top views of a shield 300 according to embodiments described herein. In particular, fig. 4A, 4B and 4C show cross-sectional views through section line B-B as shown in fig. 2. For clarity, the electrical interconnects 103 are not shown in fig. 4A, 4B, and 4C.

Similar to the example shown in fig. 3A and 3B, the example shown in fig. 4A, 4B, and 4C shows another example of an arrangement of openings so that the shield 300 can be reconfigured. Referring first to fig. 4A, the first shield element 301 is again provided with two first lateral openings 305 arranged on substantially opposite sides of the first shield element 301. In this case, however, lateral shield element 302 is provided with a small second lateral opening 306A and a large second lateral opening 306B. In the configuration shown in fig. 4A, neither the small second lateral opening 306A nor the large second lateral opening 306B is aligned with either of the two first lateral openings 305, respectively. Thus, in this first configuration, two of the first lateral openings 305 are in a closed state.

Fig. 4B shows a second configuration, in which the lateral shield element 302 has been rotated in a clockwise direction about the longitudinal axis R. In this second configuration, one of the two first lateral openings 305 is now aligned with the large second lateral opening 306B such that one of the two first lateral openings 305 is in an open state. The other of the two first lateral openings 305 remains misaligned with the small second lateral opening 306A so that the other of the two first lateral openings 305 remains in a closed state. In the configuration shown in fig. 4B, the electrical interconnect 103 may now be attached to the terminal 206 such that it extends laterally through one of the two first lateral openings 305.

Fig. 4C shows a third configuration, in which the lateral shield element 302 has been rotated further in a clockwise direction about the longitudinal axis R. In this third configuration, one of the two first lateral openings 305 is still aligned with the large second lateral opening 306B such that one of the two first lateral openings 305 is in an open state, as in fig. 4B. However, the other of the two first lateral openings 305 is now aligned with the small second lateral opening 306A, so that the other of the two first lateral openings 305 is also in an open state. In the configuration shown in fig. 4C, the first electrical interconnect 103 may now be attached to the terminal 206 such that it extends laterally through one of the two first lateral openings 305, and the second electrical interconnect 103 may also be attached to the terminal 206 such that it extends laterally through the other of the two first lateral openings 305.

In the present disclosure, the arrangement of the first and second lateral openings 305 and 306 is not limited to the arrangement shown in fig. 3A, 3B, 4A, 4B, and 4C. Rather, any arrangement of the first and second lateral openings 305, 306 is possible.

According to embodiments, which can be combined with other embodiments described herein, the at least one second shield element is an axial shield element 303 configured for opening or closing the at least one axial opening 304. As exemplarily shown in fig. 2, the axial shield element 303 may have a cap shape such that the axial shield element 303 substantially covers the at least one axial opening 304.

To be configured to open or close the at least one axial opening 304, the axial shield element 303 may be a removable cap, that is, the axial shield element 303 may be in an installed position or in a disassembled position. Fig. 2 exemplarily shows the axial shield element 303 in the mounted position. When in the mounted position, the axial shield element 303 is configured for closing the at least one axial opening 304, that is to say the axial opening 304 is in a closed state, such that the terminal 206 is electrically shielded. Removing the axial shield element 303 (i.e., deploying the axial shield 303 to a disassembled position) deploys the axial opening 304 in an open state. When the axial shield element 303 is in the dismounted position and the axial opening 304 is in the open state, the electrical interconnect 103 may be mounted to the terminal 206 such that the electrical interconnect 103 extends through the axial opening 304 in the axial direction (i.e. in the direction of the longitudinal axis R).

The axial shield element 303 may comprise fastening means. The fastening means can be operated quickly and efficiently so that the axial shield element 303 can be mounted and dismounted quickly and efficiently as required. For example, the axial shield element 303 may comprise at least one screw or bolt, which may be removed such that the axial shield element 303 may be disassembled. Preferably, the axial shield element 303 may comprise a bayonet mount as fastening means.

The axial shield element 303 may be mounted to at least one of the first shield element 301, the lateral shield element 302, a portion of the body element 204 at a high voltage potential, the conductor 205 and the terminal 206. For example, the axial shield element 303 may be mounted directly to the conductor 205 such that the axial shield element 303 is at the same electrical potential as the conductor 205, while leaving the terminal 206 for free mounting of the electrical interconnect 103. Alternatively, the axial shield element 303 may be mounted to the first shield element 301 or the lateral shield element 302 such that the axial shield element 303 is at the same electrical potential as the first shield element 301 and/or the lateral shield element 302.

According to yet a further aspect of the present disclosure, a method 400 of installing a high voltage bushing is provided. The high voltage bushing comprises a shield according to aspects and embodiments described herein. Referring now to fig. 5, fig. 5 illustrates a flow chart of a method 400. The method 400 begins at block 401. The method 400 comprises installing a high voltage bushing in block 402, configuring at least one axial opening and/or at least one first lateral opening in block 403 to be in an open or closed state, and terminating the high voltage bushing in block 404. The method 400 ends at block 405.

In block 402, the method 400 includes installing a high voltage bushing. Mounting the high voltage bushing 200 may include fastening the mounting flange 203 to the mounting surface 105 (e.g., a housing of the transformer 100). The mounting flange 203 may be secured such that the electrical bushing passes through the mounting surface 105. The mounting flange 203 may include a plurality of flange mounting holes. Fasteners may be provided for securely fastening the mounting flange 203 to the mounting surface 105 such that the fasteners pass through the flange mounting holes and the mounting surface 105.

In block 403, the method 400 includes configuring at least one axial opening and/or at least one first lateral opening to be in an open or closed state. The configuration may comprise moving at least one of the first shield element 301 and the at least one second shield element 302, 303 from a first shielding position to at least a second shielding position. For example, the first shielding position may be a configuration in which one of the first lateral or axial openings is in a closed state, and the second shielding position may be a configuration in which the respective first lateral or axial opening is in an open state. The configuration may further include removing the fastener 307 prior to moving at least one of the first shield element 301 and the at least one second shield element 302, 303, and reattaching the fastener 307 after moving at least one of the first shield element 301 and the at least one second shield element 302, 303.

According to embodiments, which can be combined with other embodiments described herein, configuring the at least one first lateral opening in block 403 comprises a relative rotation between the first shield element and the lateral shield element. The relative rotation may comprise one of rotating the first shield element 301 and holding the lateral shield element 302 in a rest position, or rotating the lateral shield element 302 and holding the first shield element 301 in a rest position. The first shield element 301 may comprise at least one first lateral opening 305 and the lateral shield element 302 may comprise at least one second lateral opening 306. The relative rotation between the first shield element 301 and the lateral shield element 302 allows to configure the position of the at least one first lateral opening 305 and the at least one second lateral opening 306. When the shields 301, 302 are rotated relative to each other such that the at least one first lateral opening 305 and the at least one second lateral opening 306 are aligned, the at least one first lateral opening 305 is in an open state. Similarly, when the shields 301, 302 are rotated relative to each other such that the at least one first lateral opening 305 and the at least one second lateral opening 306 are misaligned, the at least one first lateral opening is in a closed state.

According to embodiments, which can be combined with other embodiments described herein, configuring the at least one axial opening in block 403 comprises installing or removing an axial shield element. The mounting axial shield element 303 configures the at least one axial opening in a closed state. Removing the axial shield element 303 configures the at least one axial opening in an open state. Mounting or removing the axial shield element 303 may comprise mounting or removing fastening means, wherein the fastening means is configured for fastening the axial shield element 303. For example, the fastening means may be a bayonet mount, the fastening means being configured for detachably mounting the axial shield element 303 to the first shield element 301.

In block 404, the method 400 includes terminating the high voltage bushing. In the context of the present disclosure, the term "terminate" refers to mounting at least one electrical interconnect 103 to at least one terminal 206 such that the electrical interconnect 103 and the terminal 206 are electrically connected. For example, the terminal 206 may include a threaded portion and the electrical interconnect 103 may include an eyelet portion. The high voltage bushing may be "terminated" by mounting an eyelet portion of the electrical interconnect 103 to the terminal 206 and fastening the eyelet portion to the terminal 206 with a nut engaged with the threaded portion. The electrical interconnect 103 may be mounted such that the electrical interconnect 103 extends in an axial direction, i.e. substantially in the direction of the longitudinal axis R. Alternatively, the electrical interconnect 103 may be mounted such that the electrical interconnect 103 extends in a lateral direction, i.e. substantially in a direction perpendicular to the longitudinal axis R.

Terminating the high voltage bushing may comprise electrically connecting at least one terminal 206 of the high voltage bushing 200 to another electrical device. For example, the high voltage bushing 200 may be electrically connected to a transformer, a circuit breaker, or a bus bar.

According to embodiments, which may be combined with other embodiments described herein, terminating the high voltage bushing in block 404 comprises mounting at least one electrical interconnect to the terminal such that the at least one electrical interconnect passes through an open one of the at least one axial opening and/or the at least one first lateral opening. For example, where the at least one electrical interconnect 103 extends in a lateral direction (i.e., substantially in a direction perpendicular to the longitudinal axis R), the electrical interconnect 103 passes through a respective first lateral opening that has been configured to be in an open state. Similarly, with at least one electrical interconnect 103 extending in an axial direction (i.e., substantially in the direction of the longitudinal axis R), the electrical interconnect 103 passes through a respective axial opening that has been configured to be in an open state.

While the foregoing is directed to various aspects and embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.