JPH11113155A - Inter-board bus bushing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make compact an insulation plug of an inter-board communicating bus, by providing orthogonally to a horizontal through hole capable of inserting thereinto a connection end portion or the insulation plug of the bus a bushing mold having a current-carrying conductor molded integrally with the bushing mold, and by providing removably a conductor for connecting the bus with the bushing mold in a portion of the current-carrying conductor which is positioned oppositely to the through hole. SOLUTION: In a bushing mold 11, there is formed horizontally a through hole 12 capable of inserting thereinto a connector end portion or an insulation plug of an inter-board communicating bus to dispose orthogonally to the through hole 12 a current-carrying conductor 20 molded integrally with the bushing mold 11. In order to connecting a central conductor 14 of a bushing 10 with the current-carrying connecting portion of the insulation bus, fitting first the one-end portion of a conductive cylinder into a central conductor 14 with a multi-band 14A, a plug with a multi-ram-band is fitted subsequently into the other-end portion of the conductive cylinder to connect thereby electrically the insulation bus with the bushing 10. Thereby, the insulation plug of the inter- board communicating bus can be made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-panel bushing which can be suitably used for connecting an inter-panel communication bus such as a cubicle type gas insulated switchgear (GIS).

[0002]

2. Description of the Related Art FIG. 4 shows a schematic configuration of a cubicle type gas insulated switchgear 100 using a rectangular container.
The device 100 includes a plurality of cubicles 101, 10
2, 103, the equipment for each unit circuit in the cubicle,
For example, a circuit breaker, disconnector, instrument transformer, and the like are housed. The device 100 is supplied with power by a power receiving cable 104, and a T-shaped branch connection portion between the cubicles, that is,
It is electrically connected via a T-shaped bushing 1 with an insulating bus bar 30 for inter-panel communication. In this example, the gas insulated switchgear 100 is further connected to the transformer 2 by the Tr communication cable 105.
00 is shown as being connected to 00.

FIG. 5 shows an example of a T-shaped bushing 1 used in such a gas insulated switchgear 100. Conventional T
The bushing 1 has a T-shaped bushing mold 2 made of an ordinary epoxy resin in which a T-shaped connection conductor 3 is integrally formed. That is, the T-shaped bushing mold 2 includes a horizontal portion 2A integrally formed with a sleeve-shaped connection conductor 3A, and a vertical portion integrally formed with a current-carrying conductor 3B extending vertically downward from the connection conductor 3A. 2A. The T-shaped bushing mold 2 is fixed to a gas insulated switchgear body (not shown) by a support fitting 4.

[0004] When the T-shaped bushing is located at the end of the row board, a current-carrying connection portion 31 of an insulated busbar 30 of the equipment is provided on the right side of the drawing in the horizontal portion 2A of the T-shaped bushing mold 2 in this example. The insulation plug 50 is mounted on the other side (left side in the drawing).

In the present embodiment, the current-carrying connection portion of the insulated busbar 30, that is, the cable connection material (male side) 31 has a prefabricated structure known to those skilled in the art, and is formed at the end of the busbar (cable) 30. Connection terminal (plug and multi-ram band) 32, stress cone 33, cable protection fitting 3
4. Connected to the sleeve-shaped conductor 3A of the connection portion in the bushing by a connection component such as a compression device 35. The insulating plug 50 is formed by an insulating rod 51 and an insulating plug component formed around the insulating rod 51, such as a stress cone 52, a blind lid 53, and a compression device 54. The insulating plug 50 has an end opposite to the busbar connection end of the bushing 1. The part is electrically closed.

[0006]

According to the above-mentioned conventional T-shaped bushing 1, the bus connecting structure thereof is configured symmetrically with respect to the central axis of the T-shaped connecting conductor 3 (position of the conducting conductor 3B). . That is, the sleeve-shaped connection conductor 3A and the bushing mold horizontal portion 2A are configured to protrude to both sides, that is, left and right with respect to the current-carrying conductor 3B and the bushing mold vertical portion 2B. Accordingly, as described above, the insulating plug 5 is provided in the opening on the opposite side to which the bus is not connected.
It is necessary to assemble 0 and maintain the electrical characteristics.

However, the insulating plug 50 must have a shape in which the protruding bus-bar connection portion, that is, one portion of the bushing mold horizontal portion 2A integrally formed with the sleeve-like connection conductor 3A is held. Instead, the shape protrudes greatly outside the bushing mold horizontal portion 2A. Therefore, when the protruding end portion of the insulating plug 50 protrudes greatly from the side surface of the board, the layout of the entire apparatus is restricted, and it is necessary to change the size of the board to a size corresponding to the limitation. Could occur.

Accordingly, an object of the present invention is to reduce the size of the insulating plug to be connected, to prevent the insulating plug from protruding greatly from the side of the panel, and to simplify the structure.
An object of the present invention is to provide an inter-panel busbar bushing which is inexpensive.

Another object of the present invention is to provide an inter-panel bushing capable of reducing unnecessary members of the conventional T-shaped bushing, realizing miniaturization of a product and easy layout.

[0010]

The above object is achieved by an inter-panel bushing according to the present invention. In summary, the present invention includes a bushing mold in which a current-carrying conductor is integrally formed and arranged orthogonally to a horizontally formed through hole into which a connection end of a busbar or an insulating plug can be inserted. A busbar bushing between boards, wherein a conductor for busbar connection is detachably provided on at least one side of a portion of the conductor located in the through hole.

According to one embodiment of the present invention, a conductor for bus connection is detachably provided on one side of the portion of the current-carrying conductor located in the through hole, and a conductor for bus connection is provided on the other side. A conductor is formed integrally with the current-carrying conductor. Preferably, the detachable conductor has a head for busbar connection,
And a screw shaft for screwing into a screw hole formed in the current-carrying conductor. According to this embodiment, the insulating plug detaches the detachable conductor from the current-carrying conductor, and is attached to the bushing using a screw hole formed in the current-carrying conductor.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a bus bar bushing between boards according to the present invention will be described in more detail with reference to the drawings.

FIGS. 1 to 3 show an embodiment of an inter-board bushing 10 of the present invention. Inter-board busbar bushing 1 of the present invention
0 has a bushing mold 11 usually made of epoxy resin. The bushing mold 11 has a through-hole 12 formed in a horizontal direction in which the connection end of the inter-panel communication bus 30 or the insulating plug 40 can be inserted. Also, the bushing 1 is provided below the bushing mold 11.
A grounding layer 13 for fixing O to the gas insulated switchgear body 100 and the like is formed. Of course, support brackets (not shown)
Can be fixed to the gas-insulated switchgear body 100 or the like.

According to the present invention, the bushing mold 11
In this case, a current-carrying conductor 20 is integrally formed and arranged orthogonally to the through hole 12. The current-carrying conductor 20 may have a plate-like or rod-like shape. In this embodiment, the upper portion 20A of the current-carrying conductor 20 located at the through hole 12 has a thickness (t) of 40 mm. The lower portion 20B of the current-carrying conductor 20 formed of a copper plate having a width (length in a direction perpendicular to the paper surface in FIG. 1) of 120 mm and extending through the bushing mold 11 has a diameter (d ) 40 mm copper rods. The upper end of the current-carrying conductor upper portion 20A is buried in the bushing mold 11, while the lower end of the current-carrying conductor lower portion 20B projects outward from the bushing mold 11 and serves as a connection end for a predetermined device.

Further, according to the present invention, the upper portion 20A of the current-carrying conductor protrudes in the axial direction of the through-hole 12 on a surface facing one side of the through-hole 12 in a manner orthogonal to this surface. Thus, a columnar center conductor 14 is integrally formed. In the present embodiment, the center conductor 14 has a diameter (D) of 60 mm and a protruding amount (H) of 30 mm, but is not limited thereto. Further, an annular groove is formed on the outer periphery of the center conductor 14,
A conductor connector (multi-ram band) 14A configured to be contractible in the radial direction is disposed there.

Furthermore, according to the present invention, the upper portion 2 of the current-carrying conductor
On the surface facing the other side of the through hole 12 of 0A, a screw hole 15 is formed along the same axis as the center conductor 14.
The screw hole 15 is for attaching a detachable conductor 18 having a head 16 and a screw shaft 17 having the same shape and dimensions (same diameter D and protrusion H) as the central conductor 14. The head 16 has an annular groove formed on the outer periphery of the head 16, similarly to the center conductor 14, and a conductor connector (multi-ram band) 1 configured to be radially contractible therein.
6A is arranged.

Next, the manner of use of the inter-panel bushing 10 of the present invention having the above-described structure will be described.

FIG. 2 shows an embodiment in which the current-carrying connection portion 31 of the insulating bus 30 of the device is connected to the right side of the bushing 10 and the insulating plug 40 is mounted on the left side.

In the present embodiment, the current-carrying connection portion of the insulated busbar 30, that is, the cable connection material (male side) 31 has a prefabricated structure known to those skilled in the art, and the busbar (cable) 30 is provided.
The wedge 32 is fixed to the tip conductor portion of
A plug 36 as a connection terminal is mounted. Plug 36
Is provided with a conductor connector (multi-ram band) 36A configured to be radially contractible in an annular groove formed on the outer periphery thereof.

A stress cone 33 composed of an inner semiconductive layer 33A, rubber (Ep rubber) 33B and an outer semiconductive layer 33C is fitted around the outer periphery of the current-carrying connection portion 31 of the insulating busbar 30.

The connection between the center conductor 14 of the bushing 10 and the current-carrying connection portion 31 of the insulated busbar 30 is performed by first inserting one end of a conductive tube 37 into the center conductor 14 having the multi-ram band 14A, This is performed by inserting a plug 36 having a multi-ram band 36A into the other end of the conductive tube 37. Thereby, bus bar 30 and bushing 10 are electrically connected.

Further, the stress cone 33 inserted on the bus bar 30 moves toward the bushing 10 so that the internal semiconductive layer 33A is inserted on the conductive cylinder 37 and set at a predetermined position. And stress corn 32
Are fixed to the bushing mold 11 by connecting parts such as a cable protection fitting 34 and a compression device 35 having a spring 35A and a pressing fitting 35B.

The head 41 of the insulating plug 40 is
An electrically insulative plug 43 made of rubber (Ep rubber) having a shape and size for closing the through hole 12 on the opposite side of the center conductor 14, and provided integrally with the plug 43. And a screw shaft 42 provided. Further, in this embodiment, the plug 43 is located outside the plug 43, and the shielding member 44 and the pressing member 45 are integrally formed. Insulation plug 4 of such a configuration
No. 0 is attached to the bushing 10 by screwing the screw shaft 42 into the screw hole 15 of the current-carrying conductor 20 after the detachable conductor 18 is removed, and electrically closes the bushing 10.

According to the present invention, the size of the insulating plug 40 can be reduced.
That is, when measured from the vertical axis position of the current-carrying conductor 20, the protrusion amount (X) to the side of the bushing (see FIG. 2) is substantially 9c
m, which is 10 cm shorter than when the conventional insulating plug 50 shown in FIG. 5 is used.

FIG. 3 shows, similarly to the case of FIG. 2, on the right side of the bushing 10, the current-carrying connection 3 of the insulating bus 30 of the device.
1 is connected, and the electrical connection 31 of the insulated busbar 30 of the device is also connected to the left side of the bushing 10.

When the energized connection 31 of the insulated busbar 30 is connected to the left side of the bushing 10, the detachable conductor 18 is attached to the left side of the energized conductor 20 of the bushing 10 so that the multi-lamb band 14A on the right side of the bushing 10 is connected. It has the same structure as the central conductor 14 provided, and in the same manner as described above with reference to FIG.
1 is also connected to the left side of the bushing 10.

According to the bushing 10 of the present invention,
The bushing 10 of the present invention is provided with a gas insulated switchgear (GIS)
If the bushing 10 is known to be used as a bushing located at the end of the row, the detachable conductor 18 is not mounted in advance when the bushing 10 is shipped, and the insulating plug 40 can be incorporated. Workability can be improved, and the cost of the bushing itself can be reduced. Of course, when adding a row board, remove the insulation plug 40,
The attachment of the detachable conductor 18 enables connection of the inter-panel communication bus 30.

In the description of the above embodiment, the upper part 2
Although the center conductor 14 having the multi-lamb band 14A is integrally formed on the surface facing the one side of the through-hole 12 at 0A, the present invention is not limited to this. It is also possible to provide a detachable conductor 18 instead of the center conductor 14 formed integrally with the current-carrying conductor 20. That is, in this embodiment, the upper portion 2
In 0A, the center conductor 14 is not formed on any side,
Only the screw holes 15 for the detachable conductors 18 are formed on both sides. It is needless to say that the same operation and effect as described above can be achieved in such an embodiment.

[0029]

As described above, the inter-panel busbar bushing of the present invention has a current-carrying conductor integrated perpendicularly to a connection end of the busbar or a through hole formed in a horizontal direction into which an insulating plug can be inserted. And a conductor for busbar connection is detachably provided on at least one side of a portion of the current-carrying conductor located in the through-hole. The insulation plug can be made more compact, and the insulation plug does not protrude significantly from the side of the panel.
Further, the structure is extremely simple and the price is low. (2) The unnecessary members of the conventional T-shaped bushing can be reduced, and the product can be reduced in size and the layout can be easily achieved. Such an effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of an inter-board bushing of the present invention.

FIG. 2 is a sectional view showing one mode of use of an inter-panel bushing of the present invention.

FIG. 3 is a sectional view showing another mode of use of the busbar bushing between boards according to the present invention.

FIG. 4 is a schematic configuration diagram of a cubicle type gas insulated switchgear (GIS) that can use the inter-panel busbar bushing of the present invention.

FIG. 5 is a sectional view of a conventional T-shaped bushing.

[Explanation of symbols]

Reference Signs List 10 bus bar bushing between boards 11 bushing mold 12 through hole 14 center conductor 14A, 16A, 36A conductor connector (multi-ram band) 15 screw hole 18 detachable conductor 20 conducting conductor 32 wedge 36 plug 37 conductive tube 40 insulating plug

Claims (4)

[Claims] 1. A bushing mold in which a current-carrying conductor is integrally formed and arranged orthogonally to a through-hole formed in a horizontal direction into which a connection end of a bus bar or an insulating plug is insertable, and An inter-panel bushing, wherein a conductor for bus connection is detachably provided on at least one side of a portion located in the through hole. 2. A conductor for bus connection is detachably provided on one side of a portion of the current-carrying conductor located in the through hole,
2. A bushing between boards according to claim 1, wherein a conductor for bus connection is formed integrally with said current-carrying conductor on the other side. 3. The detachable conductor has a head for busbar connection and a screw shaft for screwing into a screw hole formed in the current-carrying conductor. Bushing between boards. 4. The bushing according to claim 3, wherein the insulating plug removes the detachable conductor from the current-carrying conductor, and attaches the detachable conductor to the bushing by using a screw hole formed in the current-carrying conductor. .