JP2002142317A - Flexible connection conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible connection conductor which does not cause decline in the insulation and increase in the dimensions of an electric devices, such as a gas-insulated switchgear, etc., to which it is applied. SOLUTION: This flexible connection conductor 20 comprises a flexible conductor 11 composed of laminated rectangular electrolytic copper foils 11a, terminals 12 and 13 put onto both ends of the conductor 11, and a braided conductor 14 which comprises copper wires braided into a flexible tube, so as to have rounded corners 14a with radii R of 0.05-0.15 mm and covers the conductor 11 between the terminals 12 and 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible connection conductor having improved insulation performance, which is used for conductive connection between terminals of an electric device such as a circuit breaker or a gas insulated switchgear.

[0002]

2. Description of the Related Art FIG. 7 is a sectional side view showing a structure of a general gas insulated switchgear. In FIG. 7, reference numeral 1 denotes a gas insulated switchgear, in which a gas insulated switchgear 2 is mounted in a housing, and 3 is a tank thereof. In the tank 3, a conductor (not shown) of a bushing 4 constituting an electric circuit of the main circuit and a vacuum valve terminal 5 are conductively connected by a flexible connection conductor 6. Other phase components and components at the ground potential, for example, a vacuum valve 6, an insulating operation rod 7, and the like are arranged.

FIG. 8 is a perspective view showing the configuration of the above-mentioned conventional flexible connection conductor, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8 and 9, reference numeral 10 denotes a flexible connection conductor. For example, the conductor 11 is formed by laminating a required number of conductive thin plates such as a strip-shaped electrolytic copper foil 11 a having a thickness of 0.035 mm. The terminal 12 or 13 is fitted by bundling copper foil ends at both ends. 12a, 13
Reference symbol a denotes a mounting hole provided in each of the terminals 12 and 13, which communicates with each hole (not shown) opened in the same position of the conductor 11, and penetrates. The corner 11b of the cross section of the conductor 11 configured as described above has a sharp edge as shown in FIG.

[0004]

The conventional flexible connection conductor 10 is constructed as described above and has a corner 11 of a cross section of the conductor 11.
Since b has a sharp edge, when a voltage is applied, the electric field strength at the corner 11b increases, and sufficient withstand voltage performance, partial discharge performance, and the like (hereinafter, collectively referred to as insulation performance).
In order to achieve the above, it is necessary to increase the spatial distance between the components having other potentials. For this reason, there has been a problem that the size of an electric device such as a gas insulated switchgear using the flexible connection conductor 10 may be increased. On the other hand, in order to suppress an increase in the size of an electric device such as a gas insulated switchgear using the flexible connection conductor 10, a separate shield is provided to make the conductor
In order to cover the corner portion 11b of the cross section and reduce the electric field strength in this portion, the number of components increases and the configuration becomes complicated,
There is also a problem that the cost of the entire electric device increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the size of an electric device such as a gas-insulated switchgear to which the present invention is applied does not deteriorate in use, and the size of an electric device such as a gas-insulated switchgear is increased. It is an object of the present invention to provide a flexible connection conductor that does not have any problem.

[0006]

A flexible connecting conductor according to the present invention is a flexible connecting conductor having terminals laminated at both ends of a flexible conductor in which conductive thin plate members are laminated, The conductor between the terminals is covered with a conductive coating having a required roundness at the outer corner. Further, the conductive coating is a flexible braided wire conductor formed by braiding a conductive wire into a tube shape. In addition, the conductive coating is a flexible conductive thin film made of an organic material having conductivity. In addition, the conductive coating,
This is a flexible ribbon-shaped conductor in which a conductive thin plate material is half-wrapped around the outer periphery of a conductor and spirally wound. Further, the conductive coating is a flexible conductive cylinder in which a plurality of conductive coating rings formed in a ring are connected in series. Further, the required roundness of the outer peripheral corner portion of the conductive coating has a radius of at least 0.05 mm.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a flexible connection conductor according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. In each of the drawings, the same reference numerals indicate the same or equivalent components. same as below. In the figure, reference numeral 20 denotes a flexible connection conductor, and φ0.
A conductor 1 between the terminals 12 and 13 is formed by a braided wire conductor 14 formed by braiding a copper wire of about 1 to 0.3 mm in a tube shape.
1 is different from the conventional example. Therefore, as shown in FIG. 2, the cross section of the portion where the conductor 11 is covered by the braided wire conductor 14 has a radius of about R0.05 as shown in FIG.
It is rounded to about R 0.15 mm. On the other hand, the outer diameter of the central cylindrical conductor in the concentric cylinder is a, the inner diameter of the outer cylindrical conductor (both not shown) is b, and the voltage between both conductors is V.
Then, the electric field E on the conductor can be expressed by Equation 1. E = V / (a * ln (b / a)) (1) Here, the thickness of the electrolytic copper foil constituting the conductor 11 is 0.035.
mm, the wire diameter of the braided wire conductor 14 is 0.1 to 0.3 mm,
Substituting the condition of the inner diameter b of the outer cylindrical conductor = 100 mm (used as an actual insulation distance) into the above equation (1), and finding the electric field when each wire diameter of each braided wire conductor is used, the braided wire conductor 14 is not covered. It is reduced to about 40 to 15% of the conventional example. That is, in the first embodiment, the flexible connection conductor 20
When a voltage is applied, the electric field strength of the corner portion 14a is reduced to about 40 to 15% of the conventional one, the insulation performance such as the withstand voltage performance and the partial discharge performance is improved, and the other potentials in the vicinity are improved. It is clear that an increase in the spatial distance to the component is prevented.

Embodiment 2 FIG. 3 is a perspective view of a flexible connection conductor according to Embodiment 2 of the present invention. In the figure, reference numeral 30 denotes a flexible connection conductor, EPD containing carbon.
The first embodiment differs from the first embodiment in that the conductor 11 between the terminals 12 and 13 is covered with a conductive thin film 15 made of a conductive organic material such as M (ethylene propylene rubber) or carbon-containing silicone rubber. different. The conductive thin film member 15 is separately thickened at its center by rubber molding, and slightly thinned at both ends so as to fit the outer shape of the conductor 11, and the conductive thin film member 15 is inserted and covered with the conductor 11. Are mounted so that both ends are slightly stretched to have the same potential. The cross section of the portion where the conductor 11 is covered with the conductive thin film body 15 has a rounded corner 14a as in FIG. 2, and has the same effect as in the first embodiment.

Embodiment 3 FIG. 4 is a perspective view of a flexible connection conductor according to Embodiment 3 of the present invention. In the figure, 40 is a flexible connection conductor, for example, 0.3 mm
A conductor 1 between the terminals 12 and 13 is formed by a ribbon-shaped conductor 16 made of a conductive thin plate material such as a thin copper plate having a thickness of about 0.5 mm.
1 is different from the case of the first embodiment. The ribbon-shaped conductor 16 is covered by spirally winding the conductor 11 in a semi-overlapping manner so that the outer periphery of the conductor 11 is wound with a bandage. Therefore, the conductor 11 is formed by the ribbon-shaped conductor 16.
2 has a rounded corner (not shown) as in FIG. 2 and has the same effect as in the first embodiment. In addition, the ribbon-shaped conductor 16
The portion to be wrapped may be formed into a shape having a step corresponding to the thickness of the sheet, and the surface after spirally winding while half-lapping may be flush.

Embodiment 4 FIG. FIG. 5 is a perspective view of a flexible connection conductor according to a fourth embodiment of the present invention, and FIG.
It is sectional drawing seen in the VI-VI direction. In the figure, reference numeral 50 denotes a flexible connection conductor, for example, a plurality of conductive coating rings 18 formed by pressing a conductive thin plate material such as a thin copper plate having a thickness of 0.3 mm to 0.5 mm into a cylindrical shape. This embodiment differs from the first embodiment in that the conductor 11 between the terminals 12 and 13 is covered by a conductive cylinder 17 that is configured to be able to move in a flexible manner. In this case, the outer peripheral corners of the conductive covering ring 18 are rounded as in the first embodiment. The conductive covering ring 18 is formed in a tubular shape with a stepped portion corresponding to the plate thickness on one side and an extended portion 18a which is greatly expanded. The conductive covering ring 18 covers the conductor 11 between the terminals 12 and 13. In order to construct the body 17, as shown in FIG. 6, the unexpanded side of the other conductive coating ring 18 is inserted sequentially inside the extended portion 18a of one adjacent conductive coating ring 18. And a series of Therefore, the conductor 1 is formed by the conductive cylinder 17.
The cross section of the portion covered with 1 has a rounded corner portion 14a as in FIG. 2, and has the same effect as in the first embodiment.

[0011]

The flexible connecting conductor according to the present invention has a structure in which conductive thin plate members are laminated and a flexible conductor is covered with a conductive covering member having a required roundness at the outer corners. Therefore, the electric field intensity at the corners at the time of voltage application is reduced, and the insulation performance is improved. For this reason, the spatial distance from components of other potentials can be shortened, and the size increase of the applied electric device can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a flexible connection conductor according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a perspective view of a flexible connection conductor according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a flexible connection conductor according to a third embodiment of the present invention.

FIG. 5 is a perspective view of a flexible connection conductor according to a fourth embodiment of the present invention.

FIG. 6 is a sectional view taken along the line VI-VI of FIG.

FIG. 7 is a sectional side view showing a configuration of a general gas insulated switchgear.

FIG. 8 is a perspective view showing a configuration of a conventional flexible connection conductor.

9 is a cross-sectional view as viewed in the direction IX-IX in FIG.

[Explanation of symbols]

11; conductor 11a; electrolytic copper foil 12, 13; terminal 1
4; braided wire conductor 14a; corner 15; conductive thin film 16; ribbon-like conductor 17; conductive cylinder 18; conductive coating ring 18a; extension 20, 30, 40, 50;

Claims (6)

[Claims] 1. A flexible connection conductor having terminals provided at both ends of a flexible conductor having a conductive thin plate material laminated thereon,
A flexible connection conductor, wherein the conductor between the terminals is covered with a conductive coating having a required roundness at an outer corner. 2. The flexible connection conductor according to claim 1, wherein the conductive covering is a flexible braided wire conductor formed by braiding a conductive wire into a tube shape. 3. The flexible connection conductor according to claim 1, wherein the conductive covering is a flexible conductive thin film made of an organic material having conductivity. 4. The flexible covering according to claim 1, wherein the conductive covering is a flexible ribbon-shaped conductor formed by spirally winding a conductive thin plate material on the outer periphery of the conductor in a half-wrapped manner. Flexible connection conductor. 5. The flexible cover according to claim 1, wherein the conductive cover is a flexible conductive cylinder in which a plurality of conductive cover rings formed in a ring are connected in series. Connection conductor. 6. The conductive coating according to claim 1, wherein a required roundness of the outer peripheral corner has a radius of at least 0.05 mm. Flexible connection conductor.