JPH04127809A - Conductor drawing device for insulation gas sealing board - Google Patents

Abstract

PURPOSE:To reduce the number of components and to reduce in size a device by integrally molding a plurality of bus conductors arranged in a tank sealed with insulation gas and a plurality of insulating bushings to be externally led with insulation resin. CONSTITUTION:A plurality (3 of three phases) of bus conductors 2 are arranged in a tank 11 sealed with insulation gas. Conductors 13a-13c of the parts to be led out of the tank from the tank 11 are passed through an insulating bushing 14 having a flange 14a integrally molded by aligning them in one row for three phases by insulating resin molding such as epoxy resin, etc., and led from above. The central S-phase bushing 14 and the conductor 13b are longer than the bushing 14 adjacent to both sides and the conductors 13a, 13c, and connected to external conductors 5. Thus, the number of components is reduced, and its size is reduced, thereby obtaining sufficient air insulating distance.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a conductor extraction device for an insulating gas filled panel in which a plurality of bus conductors are arranged in a tank filled with an insulating gas such as SF6 gas. This invention relates to a device that can be made smaller with a simple structure.

[Conventional technology]

A conventional example of a conductor drawing device for an insulating gas-filled panel will be explained based on FIGS. 4 and 5. In these figures,
Tank 1 with a sealed structure filled with insulating gas such as SF6 gas
A plurality of bus conductors 2 (the figure shows a three-phase case) are disposed within the bus conductor 2, and the lead-out conductors 3 of the bus conductors 2 are connected to the above-mentioned insulating bushings 4 through flanged insulating bushings 4 molded with a resin insulator such as epoxy resin. It penetrates the tank 1 and is drawn out from the top. The bushing 4 is a flange 4
A is fixedly attached to the top surface of the tank 1 in close contact to prevent gas leakage. The lead-out conductor 3 is connected to the bus conductor 2 at its lower end inside the tank 1, and to the external conductor 5 at its upper end in the outside air.

[Problem to be solved by the invention]

In the above structure, the required insulation space distance between the bus conductor 2 and the ground is shorter than that of the air insulation board, but there are restrictions on the required insulation space between the lead conductor 3 drawn out from the tank 1 into the outside air and the ground. This makes it difficult to downsize the entire board,
Further, since the bushing 4 is provided for each phase, the number of parts not only increases, but also the machining of one side of the tank 1 and the installation of the bushing 4 require a lot of work.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a conductor extraction device for an insulating gas-filled panel, which allows the entire panel to be miniaturized with a simple structure.

[Failure to solve the problem]

In order to achieve the above object, this invention has an insulating bushing 1 which is filled with an insulating gas and which penetrates a tank 11 and draws out the lead-out conductors 13a and 13b of a plurality of bus conductors 2 to the outside.
4 is integrally formed with ml resin mold, and a plurality of lead-out conductors 13a, 1.3b are drawn out in parallel to each other, and a part of the bushing 14 is made so that the required air insulation distance between the conductors can be ensured.
The length in the air is made to be longer by J.

[Effect]

Since the plurality of insulating bushings 14 are integrally formed with an insulating resin mold, the number of parts is reduced (installation to the tank 11 is easy, and the plurality of lead-out conductors 13a, 1
3b in parallel with each other and some bushings 14
By increasing the air length of the bushings 14 to ensure the required air insulation distance between the conductors, the dimensions in the arrangement direction of the bushings 14 can be particularly reduced, thereby making it possible to downsize the entire board.

〔Example〕

Figures 1 and 2 show examples of this invention.
Components designated by the same reference numerals as in FIGS. 4 and 5M are the same parts. In these figures, a plurality of bus conductors 2 (
The drawing shows a three-phase case), and the lead L7 conductor 13a13b of the bus conductor 2 is molded with an insulating resin such as epoxy resin and has a flange integrally formed by arranging the three phases in a row as shown in Figure 3. It penetrates the tank 11 via an insulating bushing 14 and is drawn out from the top. The plurality of lead-out conductors 13a and 13b are drawn out in parallel to each other, and are connected at both ends to the bus conductor 2 in the tank 11 and the external conductor 5 in the outside air. The bushing 14 is
The flange 14a is fixedly attached to the top surface of the tank 11 in close contact to prevent gas leakage.
The length of the bushing 14 in the outside air is appropriately long to ensure the required insulation distance in the air between the conductors.

According to the above embodiment, the plurality of insulating bushings 14 are integrally formed with insulating resin molding, which not only reduces the number of parts but also makes it easier to attach the bushings to the tank 11. Also, the plurality of lead-out conductors 13a and 13b are arranged parallel to each other. In addition to extending the aerial length of some of the bushings 14, it is possible to secure the required aerial insulation distance between the conductors, so that the insulation space distance between the bus conductors 2 in the tank 11 and the ground can be maintained within the allowable range. By packing the bushings 14, the size of the bushings 14 in the arrangement direction can be particularly reduced, thereby making it possible to downsize the entire board.

As shown in FIGS. 6 and 7, the insulating space distances between the plurality of busbar conductors 2 and the ground are reduced within the permissible range, and the plurality of insulating bushings 24 are integrally formed with an insulating resin mold. In order to ensure the required air insulation distance between the drawer conductors 23, some (R phase and T phase at both ends in the figure)
It is conceivable that the bushing 24 is bent outward on the outside of the tank 11, but such a structure makes it possible to downsize the tank 11 without reducing the number of parts, but it not only complicates the structure but also makes the bushing It is not possible to downsize the entire board due to the spread of the tip of the board 24.

〔Effect of the invention〕

According to this invention, in a conductor drawer device for an insulating gas filled panel, an insulating bushing that penetrates a tank filled with insulating gas and draws out the drawer conductors of a plurality of bus conductors to the outside is integrally formed with an insulating resin mold, and a plurality of drawers The conductors are drawn out parallel to each other and the air length of some bunosings is increased to ensure the required air insulation distance between the conductors, resulting in a simple structure with fewer parts and a smaller overall panel size. The effect of being able to do this is obtained.

[Brief explanation of drawings]

FIG. 1 is a partial vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a plan view of the bushing in FIG. 1, and FIG. is a partial vertical cross-sectional view of the conventional example;
The figure is a longitudinal sectional view taken along line V-V in Fig. 4, Fig. 6 is a partial longitudinal sectional view of another conventional example, and Fig. 7 is a longitudinal sectional view taken along line ■-■ in Fig. 6. be. 2... Bus conductor, 11... Tank, 13a, 13b
...Drawer conductor, 14...Bushing. fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig.

Claims (1)

[Claims] 1) A conductor of an insulating gas-filled panel in which a plurality of bus conductors are arranged in a tank filled with insulating gas, and the lead-out conductor of the bus conductor is drawn out through the tank through an insulating bushing. 1. A conductor drawing device for an insulating gas-filled panel, characterized in that the plurality of bushings are integrally formed with an insulating resin mold. 2) In the conductor drawing device for the insulating gas filled panel according to claim 1), the air length of some of the bushings is such that the plurality of drawer conductors can be drawn out in parallel with each other and the required air insulation distance between the conductors can be ensured. A conductor extraction device for an insulating gas-filled panel, characterized in that the length of the conductor is appropriately lengthened.