WO2023148873A1 - Main circuit terminal connection device - Google Patents

Abstract

Provided is a main circuit terminal connection device which makes it possible to reduce the load applied to a main circuit terminal of a bushing, etc. The main circuit terminal connection device according to an embodiment comprises a coupling part and a jumper wire, and connects an overhead electric wire to a main circuit terminal of a bushing. The coupling part is disposed on a surface of the main circuit terminal, and mechanically couples one end of the overhead electric wire to the main circuit terminal. One end of the jumper wire is electrically connected to a branching part of the overhead electric wire, and the other end is electrically connected to the main circuit terminal. The coupling part has a rotating part and a linear motion part. The rotating part is coupled to one end of the overhead electric wire, and is configured such that the one end of the overhead electric wire rotates around an axis extending along a direction orthogonal to the surface of the main circuit terminal as well as an axis extending along a direction inclined to the direction orthogonal to the surface of the main circuit terminal. The linear motion part is configured such that the rotating part moves along the direction orthogonal to the surface of the main circuit terminal.

Description

Main circuit terminal connection device

The embodiment of the present invention relates to a main circuit terminal connection device.

Power system equipment, including equipment such as switchgear and transformers, is equipped with bushings for power transmission and distribution. A main circuit terminal is provided on the top of the bushing, and the main circuit terminal electrically connects between a conductor provided inside the bushing and an overhead wire provided outside the bushing. . For example, a compression terminal provided at the end of an overhead wire and a main circuit terminal of a bushing are fastened using a bolt.

Overhead power lines are affected by strong winds and may sway in various directions depending on the direction of the wind. Therefore, a wind pressure load due to swinging of the overhead wire acts on the bushing.

Also, when a short-circuit accident occurs in the power system, a short-circuit electromagnetic force is generated in the overhead line. Therefore, the load due to the short-circuit electromagnetic force generated in the overhead wire acts on the bushing.

FIG. 9 is a diagram schematically showing how short-circuit electromagnetic force is generated in an overhead wire in a power system facility of related technology.

FIG. 9 shows an example of the short-circuit electromagnetic force F generated in the overhead wire 20 connected to the bushing 10 during a two-phase short-circuit accident. In the case of a two-phase short-circuit fault, the current direction of the fault phase overhead wire 20 is opposite to the current direction of the healthy phase overhead wire 20 . Therefore, as can be seen from the left-hand principle of framing, the overhead wires 20 of the fault phase in which the short-circuiting electromagnetic force F is generated repel each other and approach the overhead wire 20 of the normal phase.

As described above, the bushing 10 receives loads (wind pressure load, short-circuit electromagnetic force) due to the movement of the overhead wire 20, and is required to have mechanical strength to withstand the load. In particular, high mechanical strength is required for the connecting portion that connects the main circuit terminal (not shown) located at the top of the bushing 10 and the compression terminal (not shown) of the overhead wire. Therefore, in the development of bushings, bending load tests are used to confirm that the bushings have sufficient mechanical strength.

JP-A-6-315219 JP-A-2009-240020

In the design and manufacture of bushings, it is required to reduce the load applied to the main circuit terminals of the bushings in order to improve reliability while ensuring current-carrying performance between the main circuit terminals and overhead wires. .

Therefore, the problem to be solved by the present invention is to reduce the load applied to the main circuit terminal of the bushing and to ensure the current-carrying performance between the main circuit terminal and the overhead wire at the same time, thereby improving reliability. It is an object of the present invention to provide a main circuit terminal connection device capable of improving

The main circuit terminal connection device of the embodiment includes a connecting portion and a jumper wire, and connects an overhead wire to the main circuit terminal of the bushing. The connection part is installed on the surface of the main circuit terminal and mechanically connects one end of the overhead wire to the main circuit terminal. The jumper wire has one end electrically connected to the branch of the overhead wire and the other end electrically connected to the main circuit terminal. The connecting portion has a rotating portion and a linear motion portion. The rotating portion, to which one end of the overhead wire is connected, rotates about an axis along a direction orthogonal to the surface of the main circuit terminal and an axis along a direction inclined with respect to the direction orthogonal to the surface of the main circuit terminal. One end of the overhead wire is configured to rotate as a shaft. The linear motion part is configured such that the rotating part moves along a direction perpendicular to the surface of the main circuit terminal.

FIG. 1 is a diagram (side view) schematically showing a main circuit terminal connection device 30 according to an embodiment. FIG. 2 is a diagram (enlarged sectional view) schematically showing the main circuit terminal connection device 30 according to the embodiment. FIG. 3 is a diagram (front view) schematically showing the main circuit terminal connection device 30 according to the embodiment. FIG. 4 is a diagram (top view) schematically showing the main circuit terminal connection device 30 according to the embodiment. FIG. 5A is a diagram showing a state in the main circuit terminal connection device 30 according to the embodiment when a load F10a acts on the overhead wire 20 so as to pull it out in one of the first horizontal directions x (to the right). FIG. 5B is a diagram showing a state in the main circuit terminal connection device 30 according to the embodiment when a load F10a acts on the overhead wire 20 so as to pull it out in one (right) of the first horizontal directions x. FIG. 6 is a diagram showing a state in which a load F10b acts on the overhead wire 20 in the main circuit terminal connection device 30 according to the embodiment so that the overhead wire 20 is pulled out in the other (left) direction of the first horizontal direction x. FIG. 7 is a diagram showing a state in which a load F10c acts on the overhead wire 20 so as to pull it out in one of the second horizontal directions y (upward) in the main circuit terminal connection device 30 according to the embodiment. FIG. 8A is a diagram schematically showing a main circuit terminal connection device 30 according to a modification of the embodiment. FIG. 8B is a diagram schematically showing a main circuit terminal connection device 30 according to a modification of the embodiment. FIG. 9 is a diagram schematically showing a situation when a short-circuit electromagnetic force is generated in an overhead wire in the related art.

[A] Configuration of Main Circuit Terminal Connecting Device 30 FIGS. 1 to 4 are diagrams schematically showing the main circuit terminal connecting device 30 according to the embodiment.

1 shows a side view, and FIG. 2 shows an enlarged cross section of a part of the side view of FIG. 1 and 2, the vertical direction is the vertical direction z, the horizontal direction is the first horizontal direction x, and the direction perpendicular to the paper surface is the second horizontal direction x and the second direction perpendicular to the vertical direction z. horizontal direction y.

Fig. 3 shows a front view. In FIG. 3, the vertical direction is the vertical direction z, the horizontal direction is the second horizontal direction y, and the direction orthogonal to the paper surface is the first horizontal direction x.

Fig. 4 shows a top view. In FIG. 3, the direction orthogonal to the paper surface is the vertical direction z, the horizontal direction is the first horizontal direction x, and the vertical direction is the second horizontal direction y.

As shown in FIGS. 1 to 4, the main circuit terminal connecting device 30 of this embodiment includes a connecting portion 40 and a jumper wire 50, and connects between the main circuit terminal 11 of the bushing 10 and the overhead wire 20. is configured to Each part constituting the main circuit terminal connection device 30 will be described in order.

[A-1] Connection part 40
In the main circuit terminal connection device 30, the connection part 40 is installed on the upper surface of the main circuit terminal 11 so as to mechanically connect one end of the overhead wire 20 to the main circuit terminal 11, as shown in FIGS. It is The connection part 40 is configured using, for example, a metal material.

4, the main circuit terminal 11 includes a main circuit terminal disc portion 111 and a main circuit terminal projecting portion 112, and the main circuit terminal projecting portion 112 extends from the main circuit terminal disc portion 111 to a second position. 2 It is configured to protrude in the horizontal direction y, and the connecting portion 40 is installed on the main circuit terminal disc portion 111 .

In the present embodiment, the connecting section 40 includes a housing 400, a rotating section 410, and a linear motion section 420, as shown in FIG.

[A-1-1] Housing 400
As shown in FIG. 2, the housing 400 of the connecting section 40 includes a bottom plate 401 and a cover 402, and accommodates the rotating section 410 and the linear motion section 420 in an internal accommodation space.

[A-1-1-1] Bottom plate 401
The bottom plate 401 is, for example, a circular plate-like body, and is installed on the upper surface of the main circuit terminal 11 as shown in FIG.

[A-1-1-2] Cover 402
The cover 402 includes, for example, a cylindrical portion 4021, a flange 4022, and a ring plate portion 4023, and is installed on the upper surface of the main circuit terminal 11 via the bottom plate 401, as shown in FIG.

In the cover 402 , the cylindrical portion 4021 has a central axis CL along the direction perpendicular to the upper surface of the main circuit terminal 11 (vertical direction z). The flange 4022 is provided at one end of the cylindrical portion 4021 located on the bottom plate 401 side, and is formed to protrude outward from the outer peripheral surface of the cylindrical portion 4021 . The ring plate portion 4023 is provided at the other end of the cylindrical portion 4021 opposite to the bottom plate 401 side, and is formed to protrude inward from the cylindrical portion 4021 . A through hole H4023 is formed in the central portion of the ring plate portion 4023 .

[A-1-2] Rotating portion 410
As shown in FIGS. 1 to 4, one end of the overhead wire 20 is connected to the rotating portion 410 of the connecting portion 40 . The rotating portion 410 has an axis along a direction perpendicular to the surface of the main circuit terminal 11 (vertical direction z) and a direction inclined with respect to a direction perpendicular to the surface of the main circuit terminal 11 (vertical direction z). It is configured such that one end of the overhead electric wire 20 connected thereto rotates about the axis along which it runs as a rotation axis.

Here, the rotating portion 410 includes a connecting ball 411, a ball bearing 412, a rolling element 413, and a lid portion 414, as shown in FIG.

[A-1-2-1] Connection ball 411
As shown in FIG. 2, the connection ball 411 is, for example, a spherical body to which one end of the overhead wire 20 is connected.

In this embodiment, an overhead wire terminal 21 is installed at one end of the overhead wire 20 via a connector 22, and the overhead wire terminal 21 is formed with a bolt hole H21 penetrating therethrough. Further, the connecting ball 411 is provided with a bolt hole H411, which is a female screw, extending along the radial direction of the connecting ball 411. As shown in FIG. The overhead wire terminal 21 is fixed to the connection ball 411 by inserting the bolt 210 which is a male screw into the bolt hole H21 of the overhead wire terminal 21 and the bolt hole H411 of the connection ball 411 .

[A-1-2-2] Ball bearing 412
As shown in FIG. 2 , the ball bearing 412 has, for example, a hemispherical bowl shape and is arranged coaxially with the cylindrical portion 4021 of the cover 402 inside the housing 400 . The ball bearing 412 rotatably supports the connecting ball 411 so that the central axis of rotation of the connecting ball 411 can be tilted with respect to the central axis CL of the cylindrical portion 4021 .

[A-1-2-3] Rolling element 413
The rolling element 413 is, for example, a spherical body having a smaller diameter than the connecting ball 411 and is interposed between the connecting ball 411 and the ball bearing 412, as shown in FIG. The rolling element 413 rolls between the connecting ball 411 and the ball bearing 412 as the connecting ball 411 rotates. The rolling elements 413 constitute rolling bearings together with the ball bearings 412 .

[A-1-2-4] Lid portion 414
As shown in FIG. 2 , the lid portion 414 is, for example, a circular plate-like body and is installed on the ball bearing 412 . The lid portion 414 closes the space in the ball bearing 412 in which the connecting balls 411 and the rolling elements 413 are accommodated, and holds the connecting balls 411 and the rolling elements 413 inside the ball bearing 412 .

The lid portion 414 includes a central portion protruding upward from the through hole H4023 of the ring plate portion 4023 that constitutes the housing 400 . An opening H414 is formed in the central portion of the lid portion 414, and a portion of the connecting ball 411 protrudes from the opening H414. Also, the lid portion 414 is configured to engage with the ball bearing 412 at its periphery.

A protective member 414a made of, for example, rubber is provided on the upper surface of the central portion of the lid portion 414 that protrudes upward from the through hole H4023 of the ring plate portion 4023. As shown in FIG. A protective member 414b made of, for example, rubber is provided on the lower surface of the lid portion 414 located on the ball bearing 412 side.

[A-1-2-4] First stopper 4110, second stopper 4140
In addition to the above, the rotating portion 410 is provided with a first stopper 4110 and a second stopper 4140 as shown in FIGS.

The first stopper 4110 is a rod-shaped body, and is installed on a portion of the connecting ball 411 protruding upward from the lid portion 414 . The second stopper 4140 is a rod-shaped body and is installed in a portion of the lid portion 414 that protrudes upward from the cylindrical portion 4021 of the cover 402 .

In the rotating portion 410, the rotation range of the connecting ball 411 is restricted by the contact of the first stopper 4110 with the second stopper 4140 when the connecting ball 411 rotates.

[A-1-3] Linear motion unit 420
The linear motion portion 420 is configured such that the rotating portion 410 moves along a direction (vertical direction z) perpendicular to the upper surface of the main circuit terminal 11 .

In this embodiment, the linear motion part 420 includes a biasing member 421. The biasing member 421 is, for example, a coil spring in which a wire is spirally wound, and is arranged inside the cover 402 so as to be coaxial with the cylindrical portion 4021 of the cover 402 . Here, the biasing member 421 is arranged between the rotating portion 410 and the surface of the main circuit terminal 11 so that a gap is interposed between the rotating portion 410 and the bottom plate 401, and the main circuit terminal 11 (vertical direction z). Thereby, the linear motion part 420 can absorb the vertical vibration of the rotating part 410 .

[A-2] Jumper wire 50
In the main circuit terminal connection device 30, the jumper wire 50 has one end electrically connected to the branch portion B20 of the overhead wire 20 and the other end electrically connected to the main circuit terminal 11, as shown in FIG. there is

Here, a jumper wire terminal 51 is installed at the other end of the jumper wire 50, and as shown in FIG. affixed to the top of the

In this embodiment, the jumper wire 50 has a flat braided wire shape formed by braiding a plurality of conductor wires, and has lower rigidity than the overhead wire 20 . That is, the jumper wire 50 is more easily deformed than the overhead wire 20 .

Also, the jumper wire 50 has a length that does not increase the tension when the overhead wire 20 is moved.

The jumper wire 50 is configured to have lower electrical resistance than the connecting portion 40, for example. Thus, in the present embodiment, the overhead wire 20 and the main circuit terminal 11 are energized via the jumper wire 50 without being energized via the connecting portion 40 .

[B] Operation of main circuit terminal connection device 30 The operation of the main circuit terminal connection device 30 will be described.

[B-1] When a load directed in one of the first horizontal directions x acts on the overhead wire 20 FIGS. FIG. 10 is a diagram showing a state in which a load F10a acts on the overhead wire 20 so as to pull it out to one side (right side). 5A and B, like FIG. 1, show side views.

In FIG. 5A, broken lines indicate the loads F1, F2, and F3 applied to the connecting portion of the connection ball 411 in the fixed state in the rotating portion 410 when the load F10a acts on the overhead wire 20 . 5B, in addition to the loads F1, F2, and F3 indicated by the dashed lines, when the load F10a acts on the overhead wire 20, the load F1a, F2a and F3a are indicated by solid lines.

As shown in FIG. 5A , if the connection ball 411 is in a fixed state in the rotating portion 410 and the load F10a acts on the overhead wire 20, the dead weight of the overhead wire 20 causes the load to move along the first horizontal direction x. A load F<b>1 is applied to the connecting portion of the connecting ball 411 . At this time, when the load F2 along the vertical direction z is applied to the overhead wire 20 due to the influence of the wind or the slackness of the overhead wire 20, the connection portion of the connecting ball 411 combines the load F1 and the load F2. A load F3 is applied.

In this embodiment, since the connecting ball 411 is rotatable in the rotating portion 410, as shown in FIG. 5B, the connecting ball 411 moves in one direction ( right). When the connecting ball 411 rotates, the load Fa in the first horizontal direction x and the load Fb in the vertical direction z decrease. Therefore, the combined load Fe applied to the connection portion of the connection ball 411 when the connection ball 411 rotates is greater than the load Fc applied to the connection portion of the connection ball 411 when the connection ball 411 is assumed to be in a fixed state. becomes smaller (Fe<Fc). That is, the load F10a applied to the connecting portion of the connecting ball 411 in the rotating portion 410 is used to rotate the connecting ball 411, so the load directly acting on the connecting portion of the connecting ball 411 is reduced.

As a result, the load applied to the bushing 10 is reduced, and the connection state between the connecting ball 411 of the connecting portion 40 and the overhead wire 20 can be sufficiently maintained.

In addition, in the present embodiment, the jumper wire 50 has a flat braid shape, has lower rigidity than the overhead wire 20, and has a length that does not increase tension when the overhead wire 20 is moved. Therefore, even if a load is applied to the overhead wire 20 and the connecting ball 411 is rotated at the connecting portion 40 as described above, the jumper wire 50 allows the overhead wire 20 and the main circuit terminal 11 to be connected. It is possible to ensure the energization between

[B-2] When a load toward the other of the first horizontal directions x acts on the overhead wire 20 FIG. ) is a diagram showing a state in which a load F10b acts on the overhead wire 20 so as to pull it out. FIG. 6, like FIG. 1, shows a side view.

In this case, in the present embodiment, the connection ball 411 rotates in the other direction (left side) in the first horizontal direction x. Here, the connecting ball 411 rotates to such an angle that the first stopper 4110 installed on the connecting ball 411 contacts the second stopper 4140 installed on the lid portion 414 .

As described above, the load applied to the connecting portion of the connecting ball 411 is smaller when the connecting ball 411 rotates than when the connecting ball 411 is assumed to be in a fixed state. Therefore, the load applied to the bushing 10 is reduced, and the connection state between the connecting ball 411 and the overhead wire 20 can be sufficiently maintained.

Also, as described above, even in this case, the jumper wire 50 can ensure energization between the overhead wire 20 and the main circuit terminal 11 .

In addition, when the load F10b is applied to the connection ball 411 while the connection ball 411 is rotated until the first stopper 4110 and the second stopper 4140 are in contact with each other, the rotation portion 410 including the connection ball 411 is moved. inside the housing 400, the biasing member 421 of the linear motion unit 420 contracts (see FIG. 2). Here, the portion of the biasing member 421 located on the left side in the first horizontal direction x contracts. Then, the movement of the rotating portion 410 stops when the biasing force (repulsive force) of the biasing member 421 is balanced. Therefore, since the overhead wire 20 connected to the connecting ball 411 does not move beyond the insulation separation distance, it is possible to effectively prevent the occurrence of a short-circuit accident.

[B-3] When a load directed toward one side (upward) of the second horizontal direction y acts on the overhead wire 20 FIG. FIG. 10 is a diagram showing a state in which a load F10c acts on the overhead wire 20 so as to pull it out to one side (upward). FIG. 7, like FIG. 4, shows a top view.

In this case, in the present embodiment, the connecting ball 411 rotates in one direction (upward) in the second horizontal direction y. Here, the connecting ball 411 rotates to such an angle that the first stopper 4110 installed on the connecting ball 411 contacts the second stopper 4140 installed on the lid portion 414 .

Even in this case, the load applied to the connecting portion of the connecting ball 411 is smaller when the connecting ball 411 rotates than when it is assumed that the connecting ball 411 is fixed. Therefore, the load applied to the bushing 10 is reduced, and the connection state between the connecting ball 411 and the overhead wire 20 can be sufficiently maintained.

Although not shown, the jumper wire 50 can also ensure energization between the overhead wire 20 and the main circuit terminal 11 in this case.

In this embodiment, since the rotation range of the connection ball 411 is restricted by the first stopper 4110 and the second stopper 4140, for example, the overhead wires 20 arranged adjacent to each other in the second horizontal direction y The proximity between them is restricted, and the insulation separation distance can be secured. As a result, it is possible to effectively prevent the occurrence of a short-circuit accident.

[C] Conclusion As described above, the main circuit terminal connection device 30 of the present embodiment is installed on the surface of the main circuit terminal 11, and the connecting portion 40 mechanically connects one end of the overhead wire 20 to the main circuit terminal 11. and a jumper wire 50 having one end electrically connected to the branch portion B20 of the overhead wire 20 and the other end electrically connected to the main circuit terminal 11 . The connecting portion 40 includes a rotating portion 410 configured such that one end of the connected overhead wire 20 rotates, and a rotating portion 410 for moving along a direction perpendicular to the surface of the main circuit terminal 11 . and a linear motion part 420 . Therefore, in this embodiment, as described above, the load applied to the main circuit terminal 11 of the bushing 10 can be reduced by the action of the connecting portion 40 including the rotating portion 410 and the linear motion portion 420 . In addition, in the present embodiment, it is possible to ensure the conduction performance between the main circuit terminal 11 and the overhead wire 20 via the jumper wire 50 . As a result, the main circuit terminal connection device 30 of the present embodiment can achieve improved reliability.

In the main circuit terminal connection device 30 of the present embodiment, the jumper wire 50 has a flat braided wire shape, has lower rigidity than the overhead wire 20, and is easily deformed. Therefore, the jumper wire 50 can be deformed with the movement of the overhead wire 20, and the jumper wire 50 is less likely to be damaged, so that the reliability of the energization performance can be further improved.

[D] Modification In the above-described embodiment, as shown in FIG. Although the case where the overhead wire 20 is connected to the overhead wire terminal 21 so that one end of the overhead wire 20 is along the first horizontal direction x) has been described, the present invention is not limited to this.

8A and 8B are diagrams schematically showing a main circuit terminal connection device 30 according to a modification of the embodiment.

As shown in FIG. 8A, the connector 22 is attached to the overhead wire 20 so that one end of the overhead wire 20 is along the extension direction of the bolt hole H411 formed in the connection ball 411 (vertical direction z in FIG. 8A). may be connected to the overhead wire terminal 21 .

Further, as shown in FIG. 8B, the connector 22 is tilted in a direction (for example, the tilt angle is The overhead wire 20 may be connected to the overhead wire terminal 21 so that one end of the overhead wire 20 is along the vertical direction z).

Thus, the drawing direction of the overhead electric wire 20 can be arbitrarily changed.

<Others>
While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

10: Bushing, 11: Main circuit terminal, 20: Overhead wire, 21: Overhead wire terminal, 22: Connector, 30: Main circuit terminal connecting device, 40: Connecting part, 50: Jumper wire, 51: Jumper wire terminal, 111: main circuit terminal disk portion, 112: main circuit terminal projecting portion, 210: bolt, 400: housing, 401: bottom plate, 402: cover, 410: rotating portion, 411: connecting ball, 412: ball bearing, 413: rolling element, 414: lid portion, 414a: protective member, 414b: protective member, 420: linear motion portion, 421: biasing member, 510: bolt, 4021: cylindrical portion, 4022: flange, 4023: ring plate portion , 4110: first stopper, 4140: second stopper, B20: branching portion, CL: central axis, H21: bolt hole, H4023: through hole, H411: bolt hole, H414: opening

Claims (6)

A main circuit terminal connecting device for connecting an overhead wire to a main circuit terminal of a bushing,
a connecting portion installed on the surface of the main circuit terminal for mechanically connecting one end of the overhead wire to the main circuit terminal;
a jumper wire having one end electrically connected to the branch portion of the overhead wire and having the other end electrically connected to the main circuit terminal;
The connection part is
One end of the overhead wire is connected, and an axis along a direction orthogonal to the surface of the main circuit terminal and an axis along a direction inclined with respect to the direction orthogonal to the surface of the main circuit terminal are used as rotation axes. a rotating portion configured to rotate one end of the overhead wire;
a linear motion part configured so that the rotating part moves along a direction orthogonal to the plane of the main circuit terminal,
Main circuit terminal connection device. The rotating part is
a connecting ball to which one end of the overhead wire is connected;
a ball bearing that rotatably supports the connecting ball;
a rolling element interposed between the connecting ball and the ball bearing,
The main circuit terminal connection device according to claim 1. The linear motion part is
a biasing member provided between the rotating portion and the surface of the main circuit terminal and biasing in a direction orthogonal to the surface of the main circuit terminal;
The main circuit terminal connection device according to claim 1 or 2. The jumper wire has a lower rigidity than the overhead wire,
The main circuit terminal connection device according to any one of claims 1 to 3. The jumper wire has a flat braid shape,
The main circuit terminal connection device according to any one of claims 1 to 4. an overhead wire terminal installed at one end of the overhead wire and fixed to the connecting ball;
a connector for connecting between one end of the overhead wire and the overhead wire terminal;
The connection ball is
a bolt hole into which a bolt for fixing the overhead wire terminal is inserted, the bolt hole extending along the radial direction of the connection ball,
The connector is arranged to extend in any one of the extending direction of the bolt hole, the direction orthogonal to the extending direction of the bolt hole, and the direction inclined to the extending direction of the bolt hole. is configured to be connected along one end of
The main circuit terminal connection device according to claim 2.

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