JPH0591630A - Gas-insulated bus - Google Patents

Abstract

(57) [Summary] [Structure] The conductor 4 is supported from above by the columnar insulating spacers 13 in the metal container 12, and the opening 14 is formed at the bottom of the metal container 12 below the columnar insulating spacers 13. A gas-insulated bus bar 11 with an adhesive substance 15 applied to the opening 14 and its vicinity. [Effect] Insulation and assembly workability are improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated bus bar having a trap portion for trapping foreign matter.

[0002]

2. Description of the Related Art A metallic foreign substance mixed in a metal container at the time of assembling a gas-insulated bus bar may randomly move between a conductor and a metal container when an operating voltage is applied, which may cause dielectric breakdown. In order to solve this problem, a gas-insulated bus bar in which an adhesive substance is applied to the entire bottom of the inner wall surface of the metal container and a gas-insulated bus bar in which a metal plate is arranged in the gap between the conductor and the bottom of the metal container have been proposed. There is.

A gas-insulated bus bar coated with an adhesive substance is shown in FIG.
And as shown in FIG. That is, the insulating spacers 3 are arranged on both ends of the metal container 2, and the conductors 4 are supported by the insulating spacers 3. further,
The adhesive substance 5 is applied to the entire bottom of the inner wall surface of the metal container 2.

In the gas-insulated bus bar 1 having such a structure, the foreign matter 6 mixed in the metal container 2 falls to the bottom of the metal container 2 and is trapped by the adhesive substance 5, so that the insulation performance is prevented from deteriorating. You can However, this gas-insulated bus bar 1 has a poor workability in assembling the conductor 4, and there is a problem that it is difficult to apply the adhesive substance 5 particularly when the conductor 4 is assembled first.

A gas-insulated bus bar 7 using a metal plate is constructed as shown in FIGS. 4 to 6. An insulating spacer 10 is fixed to the inner wall surface of a metal container 8 containing an insulating gas via a metal pin 9. Insulating spacer 10 has conductor 4
A metal plate 11 supported by the metal pins 9 is provided below the conductor 4. The metal plate 11 is formed with a plurality of slits 11a in parallel.

In the gas-insulated bus bar 7 constructed as described above, the metal container 8 and the metal plate 11 are connected via the metal pin 9, so that both are at the same potential. Therefore, the electric field in the region between the metal plate 11 and the metal container 8 is weakened, the foreign matter 6 does not easily move, and it is possible to prevent the insulation performance from deteriorating. However, this gas-insulated bus bar 7 has a drawback that the metal plate 11 is easily deformed and the handling thereof must be done with care, and there is a problem in workability during assembly.

[0007]

As described above, the gas-insulated bus bars proposed so far are assembled in order to install a device for preventing the deterioration of the insulation performance due to the foreign substances mixed in the metal container. There was a problem that workability deteriorates. Therefore, an object of the present invention is to provide a gas-insulated bus bar which has good assembling workability and excellent insulation performance.

[0008]

In order to achieve the above object, according to the present invention, in a gas-insulated busbar in which a conductor is arranged in a metal container in which an insulating gas is sealed, the conductor has a columnar shape fixed to the metal container. A gas-insulated bus bar, characterized in that it is supported and fixed from above by an insulating spacer, a recess is formed in the bottom of the metal container below the insulating spacer, and an adhesive substance is applied to the inside and the vicinity of this recess. To do.

[0009]

The foreign matter mixed in the metal container drops to the bottom of the metal container, and the concave substance provided in the bottom of the metal container and the adhesive substance applied in the vicinity of the recess catch the fallen foreign matter. When the sticky substance is not applied to the bottom portion where the foreign matter has fallen, the foreign matter starts random movement and moves to the concave portion, so that it is also captured by the sticky substance. The concave portion can be used as a work opening for disposing a columnar insulating spacer or applying an adhesive substance.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas insulated bus bar according to the present invention will be described below with reference to FIG.

A columnar insulating spacer 13 is provided on the upper portion of the inner wall surface of a metal container 12 containing an insulating gas. The columnar insulating spacer 13 supports the conductor 4 from above, and a concave opening 14 is provided below the mounting portion of the columnar insulating spacer 13. An adhesive substance 15 is applied to the opening 14 provided at the bottom of the metal container 12 and its vicinity. Next, the operation will be described.

The foreign material 7 mixed in the metal container 12 is a metal container.
If it falls to the bottom of 12 and the sticky substance 15 is applied to the drop position, it is captured by the sticky substance 15 as it is. When the sticky substance 15 is not applied to the falling position of the foreign matter 7, the foreign matter 7 starts random motion due to the operating voltage. At this time, since the foreign matter 7 does not move above the conductor 4, the foreign matter 7 does not adhere to the columnar insulating spacers 13 arranged above. Therefore, the dielectric strength of the columnar insulating spacers 13 is maintained, and creeping damage can be prevented.

The foreign matter 7 that has moved to the opening 14 by the random movement is captured by the applied adhesive substance 15. Since the adhesive substance 15 does not easily release the foreign matter 7 that has been adhered and trapped, it is possible to prevent dielectric breakdown due to the foreign matter 7 moving between the conductor 4 which is the high voltage portion and the metal container 12.

On the other hand, the opening 14 provided at the bottom of the metal container 12
Since is a concave type, it is easy to apply the adhesive substance 15 in the opening 14 and its vicinity. In addition, since the opening 14 is located below the columnar insulating spacer 13 and can be used as a working port when the columnar insulating spacer 13 is arranged, the assembling workability is improved. Such an effect of this embodiment can be obtained by using the following method not only when the operation applied voltage is an AC voltage but also when it is a DC voltage.

When the gas-insulated bus bar 11 is used for direct current,
Before the use, if the AC voltage is applied while inclining the entire gas-insulated busbar 11 and the foreign matter 7 is trapped in the adhesive substance 15 in advance and then the DC voltage is applied, the foreign matter 7 is adhered as in the case of using the AC voltage. Foreign matter 7
It is possible to prevent dielectric breakdown due to movement of the. The conditioning method in which the voltage is applied while inclining the gas-insulated bus bar before use is effective even when the operating voltage is AC.

[0016]

As described above, according to the gas-insulated bus bar of the present invention, an adhesive substance for capturing foreign matter is applied to the concave portion, and the concave portion can be used as a working hole. In addition, it is possible to provide a gas-insulated bus bar that is easy to assemble.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a gas-insulated bus bar showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional example.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view of another conventional example.

5 is a sectional view taken along the line BB of FIG.

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

[Explanation of symbols]

4 ... Conductor, 11 ... Gas insulated busbar, 12 ... Metal container, 13 ... Columnar insulating spacer, 14 ... Opening part, 15 ... Adhesive substance.

Claims (1)

[Claims] 1. In a gas-insulated busbar in which a conductor is arranged in a metal container filled with an insulating gas, the conductor is supported and fixed from above by a columnar insulating spacer fixed to the metal container, and below the insulating spacer. A gas-insulated bus bar, characterized in that a recess is formed in the bottom of the metal container, and an adhesive substance is applied to the inside and the vicinity of the recess.