JPH0870512A - Gas-insulated switch device - Google Patents

Abstract

PURPOSE: To reduce an installation space by disposing a PCT unit between a pair of transformer units and disposing them between a pair of receiving units and directly interconnecting the transformer units and the receiving units without interposing a conduit line and disposing the respective units so as to extend in the forward and backward directions. CONSTITUTION: A pair of transformers 3 are disposed on both sides of a PCT unit 2 and a pair of receiving units 1 are disposed on both sides of the respective units 2, 3. The receiving units 1 are directly connected to a transmission line through a cable and the transformer units 3 are directly connected to transformers 4. Thereby, the installation space can be reduced and the conversion of PCT is facilitated. Since the respective units are long in the forward and backward directions, a monitor panel and a panel are mounted in the front surface, thereby being able to facilitate monitoring. Further, since the receiving units 1 and the transformer units 3 are interconnected without interposing a conduit line, the receiving units 1 and the transformer units 3 can be integratedly transported.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear, in which the arrangement of each unit is improved.

[0002]

2. Description of the Related Art As a gas-insulated switchgear for receiving electricity, there are those which are arranged as in the conventional examples 1 to 3 shown in FIGS. 7A and 7B are plan views showing the arrangement and connection state of each unit in the gas insulated switchgear according to Conventional Example 1. In FIG. 7, 1 is a power receiving unit, 2 is a PC
T (transformer and current transformer for transaction instruments) unit, 3 is a transformer unit. Further, 5 is a current transformer, 6 is a cable head, 7 is a lightning arrester, 8 is a ground switch, 9 is a disconnector, 10 is a circuit breaker, and 11 is a PCT.

The cable heads 6 on the power receiving unit 1 side are connected to power transmission lines (not shown) via cables (not shown), while the transformer units 3 are directly connected to the transformers 4, respectively.

8 and 9 are plan views showing the arrangement of each unit in the gas insulated switchgear according to the conventional examples 2 and 3. As shown in FIG. The wiring diagrams in Conventional Examples 2 and 3 are substantially the same as those in Conventional Example 1 and will not be described.

In the gas insulated switchgear according to the conventional examples 1 to 3, when the PCT 11 is out of order or when it is time to perform regular replacement, a plurality of rollers are drawn on the floor surface and the PCT 11 is placed on the rollers and pushed. PCT up to loading / unloading door not shown
11 is moved, and then a new PCT is moved in the same manner and attached at a predetermined position.

[0006]

However, since the units are separated from each other, the installation space for the gas insulated switchgear becomes large. In addition, since the installation space is large, the distance for moving the PCT by pulling the roller on the floor when exchanging the PCT becomes long, which results in heavy labor.

Therefore, an object of the present invention is to provide a gas-insulated switchgear which solves the above problems.

[0008]

The structure of the present invention for achieving the above object includes a pair of power receiving units for receiving power, a single PCT unit for connecting a PCT, and a transformer. A gas-insulated switchgear comprising at least a single transformer unit for connection, comprising:
The T unit is arranged long in the front-rear direction in the center, and the transformer unit is arranged long in the front-rear direction at at least one of the positions sandwiching the PCT unit from the left and right, and is connected to the PCT unit via a pipeline. The power receiving unit is long in the front-rear direction at positions sandwiching the PCT unit and the transformer unit from the left and right, and is directly connected to the transformer unit without a pipe line.

[0009]

[Operation] Since the units that are long in the front-rear direction are lined up in the left-right direction, the installation space for the gas-insulated switchgear is small,
Since the installation space is small, the distance to move by pulling the roller when exchanging the PCT can be small.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

(A) Embodiment 1 FIG. 1 shows Embodiment 1 of the gas insulated switchgear according to the present invention. As shown in the figure, the PCT unit 2 is arranged in the center,
The transformer units 3 are arranged on both sides of the PCT unit 2, and the power receiving unit 1 is arranged on the left side of the left transformer unit 3 and the right side of the right transformer unit 3. The power receiving unit 1 is connected to a power transmission line via a cable (not shown),
The transformer unit 3 is directly connected to the transformer 4.

As shown in FIG. 1, the power receiving unit 1 and the transformer unit 3 are directly connected to each other without a pipe line, while the transformer unit 3 and the PCT unit 2 are connected to the pipe line 1.
It is connected through 3. Therefore, the power receiving unit 1
There is no gap between the transformer unit 3 and the PCT unit 2, and a gap is formed between the transformer unit 3 and the PCT unit 2 by the amount of the pipeline 13. Then, a monitoring board and a decorative plate (not shown) are attached to the front side of the gas insulated switchgear below the power receiving unit 1, the transformer unit 3 and the PCT unit 2 in FIG.

A wiring diagram of the gas insulated switchgear is shown in FIG.
The shapes and wirings of the AA cross section, the BB cross section, and the CC cross section in FIG. 1 are shown in FIGS. 5 (a), (b), and (c). Figure 5
As shown in (c), a GPT (transformer for grounding type instrument) 12 is provided below the pipeline.

Next, the operation of such a gas insulated switchgear will be described. When the PCT 11 in the PCT unit 2 is replaced, it is carried out in the same manner as the conventional one, but it can be installed in a small space because the installation space of the gas insulation switchgear is small.
The distance to move the CT 11 is small. When performing maintenance / inspection on the gas-insulated switchgear, there is no gap between the power receiving unit 1 and the transformer unit 3 because there is no pipe line, but on the side opposite to the surfaces facing each other. Since there is a sufficient gap, there is no problem in maintenance and inspection. FIG.
As shown in (2), since the power receiving unit 1 and the transformer unit 3 are not provided with a pipeline, they can be closely attached without a gap, and the power receiving unit 1 and the transformer unit 3 can be integrally transported.

(B) Embodiments 2, 3 and 4 In Embodiment 1, the connection with the power transmission line and the transformer is of the form of cable lead-in and transformer direct connection. On the other hand, the cable drawing and the cable connecting are the second embodiment shown in FIG. 2, and the bushing drawing and the direct connection of the transformer are the third embodiment shown in FIG. 3, and the bushing drawing and the cable connecting are made. This is Embodiment 4 shown in FIG. 14 in FIGS. 3 and 4
Indicates a bushing.

As can be seen from Examples 1 to 4, without changing the arrangement of the power receiving unit 1, the transformer unit 3 and the PCT unit 2, the pulling from the power transmission line to the power receiving unit 1 is referred to as cable pulling or bushing pulling. Four embodiments can be made by combining the transformer unit 3 and the transformer 4 such as direct connection or cable connection. Here, as shown in FIG. 5 (c), the PCT 11 is a vertical type that is connected from below the pipeline, but a horizontal type that is connected from the side of the pipeline can also be used.

In the first to fourth embodiments, the case where the number of transformer units connected to the transformer is two has been described, but the number of transformer units may be one or three or more.

[0018]

As can be seen from the above description, according to the gas-insulated switchgear according to the present invention, the units extending in the front-rear direction are arranged side by side in the left-right direction. Small. Also, since the installation space is small, the distance to move the PCT by placing it on a roller when exchanging the PCT is small,
Is easy to replace. Furthermore, since each unit is long in the front-rear direction, monitoring can be facilitated by mounting a monitoring board or a decorative plate on the front surface. Furthermore, since the power receiving unit and the transformer unit are connected without a pipe line, it is possible to integrally transport the power receiving unit and the transformer unit.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a plan view showing a second embodiment of the gas insulated switchgear according to the present invention.

FIG. 3 is a plan view showing a third embodiment of the gas insulated switchgear according to the present invention.

FIG. 4 is a plan view showing a fourth embodiment of the gas insulated switchgear according to the present invention.

5 relates to the first embodiment of the gas insulated switchgear according to the present invention, (a) is a view as seen from the arrow AA of FIG. 1, and (b) is a B- of FIG.
FIG. 1B is a view on arrow B, and FIG.

FIG. 6 is a connection diagram of a gas insulated switchgear according to a first embodiment of the present invention.

7A and 7B relate to Conventional Example 1 of a gas insulated switchgear, in which FIG. 7A is a plan view and FIG. 7B is a connection diagram.

FIG. 8 is a plan view showing a second conventional example of the gas insulated switchgear.

FIG. 9 is a plan view showing Conventional Example 3 of the gas insulated switchgear.

[Explanation of symbols]

 1 ... Power receiving unit 2 ... PCT unit 3 ... Transformer unit 13 ... Pipe line

Claims (1)

[Claims] 1. A pair of power receiving units for receiving power, and a single PCT unit for connecting a PCT,
A gas-insulated switchgear comprising at least a single transformer unit for connecting a transformer, wherein the PCT unit is arranged long in the front-rear direction in the center, and the transformer unit is located between the left and right sides of the PCT unit. And is connected to the PCT unit via a conduit, and the pair of power receiving units are arranged in the front-rear direction so as to sandwich the PCT unit and the transformer unit from the left and right. A gas-insulated switchgear that is directly connected to the transformer unit without a pipe line.