JPH0681370B2 - Gas insulated switchgear - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas-insulated switchgear, and more particularly to connection of a main busbar of the gas-insulated switchgear.

[Conventional technology]

When a plurality of gas-insulated switchgear are arranged in a row to form a substation or the like, the main busbar of the gas-insulated switchgear is connected, but the configuration of the main busbar connection part of the conventional gas-insulated switchgear is shown in FIG. In this figure, (1) is a busbar tank, (2) is an upper lid that closes the busbar tank (1), and (3).
Is a bellows for connecting the busbar tank (1), (4) is a linear disconnector provided in the busbar tank, (5) is a main busbar,
(6) is a spacer between main buses, (10) is a bellows (3)
And bolts for fastening the insulating spacer (11) to the busbar tank (1), (12) a metal embedded in the insulating spacer (11), (16) a main bus for connection, (17) a main busbar connection Bolt.

Conventionally, when connecting a main bus bar, the main bus bar (16) for connection is removed in front of the row board, and the entire gas-insulated switchgear is lined up in a predetermined position (see Fig. 4) and fixed in place. After that, by opening the upper lid (2), the connecting main busbar (16) is put in the busbar tank (1), the dimensions are adjusted, and the spacer (6) and the main busbar connecting bolt (17) are used. Tighten and fix to the main bus bar (5). Next, adjust the bellows (3) and the busbar tank (1) and tighten them with the bolts (10).
Complete the connection work.

[Problems to be solved by the invention]

In the conventional gas-insulated switchgear, the main busbar connection is configured as described above, so the positions of both gas-insulated switchgear to be connected must be accurately and precisely adjusted. In addition to the need for dimensional adjustment, the connection work requires work such as bolt tightening in a narrow space, which is poor in workability, resulting in poor efficiency and time.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to obtain a gas-insulated switchgear capable of slightly loosening the row board accuracy and easily and easily connecting main busbars. There is.

[Means for solving problems]

In the gas-insulated switchgear according to the present invention, a plurality of which are connected to the main bus bar in a row, wherein one of the gas-insulated switchgear to be rowed has a main bus bar connecting portion having a female-side receiving contact. The connecting portion of the main busbar of the other adjacent gas-insulated switchgear comprises a circular conductor, one end of which is a male contact for the receiving contact, and the other end has a diameter larger than the diameter of the circular conductor, An insertion main bus provided with a flange having a recess on the outer peripheral portion of the inner end surface,
A circular spacer having a diameter substantially equal to the diameter of the flange, and a bolt for fastening the insertion main bus to the main bus through the spacer so that the head does not protrude from the recess of the flange. is there.

[Work]

In the present invention, the connection can be made by inserting the male contact of the insertion main bus of the other gas-insulated switchgear into the receiving contact of one gas-insulated switchgear. Also, the other end of the insertion main bus can be fastened and connected to the main bus from the inner end face of the flange with a spacer via a spacer, and the head of the fastened bolt does not protrude in the recess formed on the inner end face of the flange. It has become. Therefore, the main busbar connection work time is significantly shortened, and difficult work with a bad posture is eliminated. Furthermore, the position adjustment of both gas-insulated switchgear at the time of row board can be connected without requiring high precision.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

As shown in FIG. 1, the gas-insulated switchgear according to the present invention has the same structure as that of the conventional gas-insulated switchgear shown in FIG. 5 except for the main busbar connecting portion. The same members as the conventional ones are designated by the same reference numerals as those in FIG. 5, and the description thereof will be omitted. As shown in FIG. 1, the female side is attached to the busbar connecting part in the busbar tank (1) of the gas-insulated switchgear on one side (left side in the figure), that is, the metal (12) embedded in the insulating spacer (11). A receiving contact (9) is provided together with the shield (8), for example bolt (12a) (third
It is attached to the burial metal (12) as shown. On the other side (right side in the figure) of the gas-insulated switchgear, the main busbar connecting portion, that is, the spacer (6) of the main busbar (5) is inserted into the male contact main busbar (7) at a position facing the receiving contact (9). Is provided. The main insertion busbar (7) is shown in enlarged detail in FIG. 3 and shows the male contact (7a) and the flange (7).
b) and a circular conductor provided at both ends, and a concave portion (7c) is provided on the outer peripheral portion of the inner end surface of the flange (7b) so that the head of the bolt (13) does not protrude. From the inner end of (7b), bolt (13), washer (14)
The structure is such that it is fastened and fixed to the main busbar (5) via the spacer (6) and is removable.

A case where the main bus is connected and the gas insulated switchgear is installed in a substation or the like will be described.

As shown in FIG. 1, in front of the row board, the respective gas-insulated switchgear devices are placed apart from each other. And one of the gas insulated switchgear (on the left in the figure) has a receiving contact (9),
An insertion main bus (7) is attached to the other adjacent (right in the figure) gas-insulated switchgear. For installation, first fix one gas-insulated switchgear at a predetermined position, then move the other gas-insulated switchgear close to it, and carefully check the condition of the main busbars in the front-back and up-down directions. If the position is adjusted and the position is determined within the predetermined allowable dimension, the contact is made as it is. At that time, the male contact (7a) of the insertion main bus (7) is inserted into the receiving contact (9), and the connection is established. The installation is complete when the bellows (3) and busbar tank (1) are tightened with bolts (10). At this time, the end of the insertion main bus bar (7) has already been automatically inserted into the receiving contact (9), and the connection has been completed. Generally, the allowable misalignment of the insertion of the receiving contact (9) and the insertion main bus (7) is several mm, which has a large margin compared to the conventional bolt tightening.
The shield (8) may be omitted.

The above describes the case where new gas-insulated switchgear is installed sequentially.However, when adding to the middle of the row board or pulling out the gas-insulated switchgear placed in the middle and inserting a substitute, As shown in FIG. 3, after completing the row board, the insertion main busbar (7) on the male side is slanted as shown by the dotted line, and after pushing it into the receiving contact (9), the cores are aligned. The main busbar tightening bolts (13) and the washers (14) can be tightened and fixed to the main busbar (5) from the inner end surface of the flange (7b) through the spacer (6). Since only one side is required for bolt tightening work, the work time can be shortened. In case of removal, the procedure is the reverse of the above.

In the above embodiment, as shown in FIG.
Although the shield (8) around the main bus bar is shown in the figure as a round shape, the main bus bar is not limited to the round shape. Fourth
In the figure, (15) is a closed container forming part of the gas-insulated switchgear. Further, the same effect as described above can be obtained regardless of whether the receiving contact or the main insertion busbar is located on either side. Further, in FIG. 2, (W ₁ ) and (W ₂ ) show the width dimensions of one set of gas-insulated switchgear, but (W ₁ ) and (W ₂ ) may have the same dimensions or different dimensions.

〔The invention's effect〕

As described above, according to the present invention, the receiving contact is attached to the main busbar of one gas-insulated switchgear, and the insertion busbar is removably attached to the opposite position of the adjacent gas-insulated switchgear via the spacer. Therefore, the main busbar can be automatically connected by arranging both gas-insulated switchgear in a row,
Also, in the gas-insulated switchgear that is lined up, the bolts are unfastened and the spacers are removed, then the insertion main busbars can be removed from the receiving contacts to disconnect the connection, and the recesses provided in the flange can be used to remove the bolt heads. Since the part is not projected, it is possible to prevent the disturbance of the electric field and eliminate the need for a shield covering the spacer.
There is no need to work in a narrow space, the dimensional accuracy is gentle, and main busbar connection and installation work can be greatly reduced, which in turn has the effect of reducing installation costs.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a main bus bar portion showing an embodiment of a gas insulated switchgear according to the present invention in a state before a row board, and FIG. 2 is a portion showing a portion shown in FIG. 1 after a row board. Sectional view, third
FIG. 4 is an enlarged partial sectional view showing an embodiment of an insertion main bus bar,
FIG. 1 is a front view of the entire assembly showing an example of a pair of gas-insulated switchgear, and FIG. 5 is a partial cross-sectional view of the conventional gas-insulated switchgear showing the main busbar connection state. In the figure, (1) is a busbar tank of the gas insulated switchgear,
(5) is a main bus, (6) is a spacer, (7) is an insertion main bus, and (9) is a receiving contact. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A gas-insulated switchgear in which a plurality of hermetically sealed gas-insulated switchgears that collectively house a unit circuit are arrayed to form a substation or the like. The connecting portion of the main bus bar is provided with a receiving contact on the female side, and the connecting portion of the main bus bar of the other adjacent gas-insulated switchgear is made of a circular conductor, and one end is a male contact for the receiving contact, An insertion main bus having a diameter larger than the diameter of the circular conductor at the other end and a flange having a recess on the outer peripheral portion of the inner end surface, a circular spacer having a diameter substantially equal to the diameter of the flange, and the flange. And a bolt for fastening the inserted main bus to the main bus via the spacer so that the head does not protrude from the recess.