JPH02254908A - Compressed-gas-insulated switchgear - Google Patents

Abstract

PURPOSE:To miniaturize equipment and to reduce building volume by providing two lead-in sections arranged in the same direction and almost in parallel to a breaker and by connecting disconnectors so that the connections may be mutually in the opposite direction. CONSTITUTION:To the two lead-in terminals provided in the same direction, upward and downward, of a circuit breaker CB1 instrument transformers CT1 and CT1' are connected respectively. To this instrument transformer CT1 a disconnector DS1 and a maintenance earth switch ES1 of the circuit breaker CB1 enclosed in one container are connected. On the other hand, to the instrument transformer CT1' a disconnector DS1' and the ES1' enclosed in one container are connected.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an annular type gas insulated switchgear, and particularly relates to a gas insulated switchgear with improved equipment arrangement. be.

(Prior art) A gas-insulated switchgear is constructed by housing circuit breakers, disconnectors, etc. in a container filled with SF8 gas, etc., which has excellent insulation and arc-extinguishing properties, and also combines equipment such as busbars. has been done. This type of switchgear can be configured to be significantly smaller than an air-insulated switchgear. In particular, in recent years, due to the remarkable rise in land prices, gas insulated switchgears, which can be made smaller, have been increasingly used in substations.

Furthermore, by rationally arranging the components, the size of the layers can be reduced, making gas insulated switchgear cheaper and substation construction including indoor gas insulated switchgear buildings even cheaper. And miniaturization becomes possible.

FIGS. 10 to 14 show examples of the arrangement and configuration of conventionally used gas-insulated switchgears. That is, an example of the arrangement of each device based on a typical single-line diagram of the annular system shown in FIG. 10 will be described with reference to FIGS. 11 to 14.

Note that this gas insulated switchgear has the following features as shown in Figure 10:
It consists of 6 circuit breaker units and 6 outgoing line units.

That is, the circuit breaker unit 1 is constructed as shown in FIG. Instrument current transformers CT and CT,' are connected to the upper outlet part and the lower outlet part provided in opposite directions of the vertically arranged circuit breaker CB1, respectively, and a disconnector D
S+ and the maintenance earthing switch ES of the circuit breaker CB+ are housed in one container, and this container, which has two openings provided in parallel, is placed on an extension of the instrument current transformer CT. On the other hand, the disconnector DS1- and the maintenance earthing switch ES1- of the circuit breaker CB are housed in one container, and this L-shaped container has two openings provided orthogonally to each other. , connected to the extension of the instrument current transformer CT, -, and provided horizontally, there is an L
type equipment BL, (for example, a joint busbar) is connected. and the circuit breaker CB+ and the disconnector DSI, DSI
The circuit breaker units 1 including - are arranged on the same plane and in a straight line.

On the other hand, the extraction line unit 1 is configured as follows. That is, the outgoing line disconnector DS2 and the branching point earthing switch ES2 are housed in one container, and this container has a T-shaped opening having two parallel openings and an opening perpendicular thereto. It is structured into a type. In addition, a grounding switch ES2- for a lead line housed in a T-shaped container is connected to the orthogonal opening of the disconnector DS2, and an upper A voltage transformer PTI is connected to the lower part, and a terminal T+ (for example, a cable terminal part) of the outgoing line is connected to the lower part, thereby forming an outgoing line unit 1. Moreover, by connecting the above-mentioned type device BL and the above-mentioned disconnector DS2,
The circuit breaker unit 1 and the outgoing line unit 1 are coupled. Further, another circuit breaker unit 2, 3.4.5.6 having the same configuration as the circuit breaker unit 1,
The other outgoing line units 2.3, 4, 5.6 having the same configuration as the outgoing line unit 1 are arranged alternately depending on the connection method of the above-mentioned circuit breaker unit 1 and outgoing line unit 1. Units 1 and 2 or 4 and 5 are arranged symmetrically with respect to the extraction line unit 1 or 4, respectively, on the same plane, and the circuit breaker units 3 and 6 are orthogonal to other circuit breaker units. It is arranged in a rectangular shape on a plane.

(Problems to be Solved by the Invention) By the way, in the conventional gas-insulated switchgear configured as described above, the components of the circuit breaker unit are arranged linearly on a plane, and adjacent devices having the same configuration Since the circuit breaker unit is also arranged in a straight line, the length g of the long side of the rectangle becomes long, leading to an increase in the size of the gas insulated switchgear. In addition, since the component devices are arranged linearly on a plane, an operation box (not shown) is required to operate each device.
Since the equipment is scattered linearly on the inside and outside of the rectangular line, the route to approach the operation box is long (and the operability, maintenance, and inspection of each equipment are also poor). Ta.

The present invention was proposed in order to eliminate the above-mentioned drawbacks, and its purpose is to improve the operability, maintenance and inspection of equipment, and to make it possible to downsize the equipment and reduce the building volume. An object of the present invention is to provide a gas insulated switchgear.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a circuit breaker unit consisting of a circuit breaker and a disconnector connected to both ends of the circuit breaker,
In an annular type gas insulated switchgear connected to an outgoing line unit and configured by connecting both units alternately and in series, the circuit breaker is vertically aligned in the same direction,
The circuit breaker unit has two lead-out portions arranged substantially parallel to each other, and the disconnector is connected to the two lead-out portions so that their connection ends are in opposite directions to each other, and Connecting the outgoing line unit to a disconnector via a T-type device or a U-shaped device, and further connecting the breaker unit and the outgoing line unit configured in the same manner alternately and arranging them in a rectangular shape, Further, the device is characterized in that the devices constituting the circuit breaker and the outgoing line unit are arranged outside the rectangular wire.

(Function) According to the gas insulated switchgear of the present invention, since the circuit breaker and the terminal of the outgoing line are arranged outside the rectangular wire, an inspection path for equipment can be formed inside the rectangular wire. Furthermore, since the circuit breaker unit does not form a rectangular line, the equipment space for the gas insulated switchgear can be significantly reduced.

(Example) Hereinafter, an example of the present invention will be specifically described based on FIGS. 1 to 6. Note that the same members as those of the conventional type shown in FIGS. 10 to 14 are designated by the same reference numerals, and explanations thereof will be omitted.

In this embodiment, as shown in FIGS. 1 and 2,
An instrument current transformer CT is connected to each of the two lead terminals provided in the upper and lower directions of the circuit breaker CB1.

CT, - is connected, and this instrument current transformer CT+ has 1
Disconnector DS+ and the circuit breaker CI housed in one container
A maintenance earthing switch ES+ of 3+ is connected, while disconnectors DS, - and ESl - housed in one container are connected to the instrument current transformers CT, -. Further, the connection terminals of the containers of the disconnectors DS and DS1' are provided perpendicularly to the terminal axis of the circuit breaker CB and in opposite directions. In the circuit breaker unit 1, each device is arranged vertically on the same plane.

On the other hand, the disconnector DS2 of the outgoing line, the grounding switch ES2 at the branch point, the grounding switch ES2- for the outgoing line, and the terminal Tt (for example, the cable terminal part) of the outgoing line,
As shown in Fig. 3, it is housed in one container, and the voltage transformer PT is placed on the top.

are connected to form an outgoing line unit. Further, the other circuit breaker units 2, 3, 4, 5, 6 have the same configuration as the circuit breaker unit 1, and the other circuit breaker units 2, 3, 4, 5, 6 also have the same structure as the circuit breaker unit 1. It has the same configuration as . In addition, F-F in Figure 1
Although the arrow view is not shown, in FIG. 2, the connection terminals of the disconnector container are arranged with the front and back sides reversed in the drawing.

Then, the outgoing line unit 1 is connected to the disconnector D via a T-shaped device BT having two parallel outlet parts.
A lead line terminal T1 is arranged and connected to the connection terminals S and - on the side of the circuit breaker CB, substantially parallel to the circuit breaker unit 1. Furthermore, the connection terminal of the disconnector (DS, negative side in FIG. 2) located at the bottom of the circuit breaker unit 2 is connected to the remaining outlet of the T-type device BTI, and the circuit breaker units 1 and 2 are connected to each other. They are arranged almost parallel. In addition, the disconnector located at the top of the circuit breaker unit 2 (DS in Figure 2)
The outgoing line unit 2 is connected to the connecting terminal on the r side) in the same way as the outgoing line unit 1 via a T-type device BT2 having the same shape as the T-type device BT1. On the other hand, to the connection terminal of the disconnector DSs of the circuit breaker unit 1, as shown in FIG. A lead-out line terminal T2 is provided on the opposite side of the circuit breaker CB1 for connection.

By repeating the above connection method, all the units are connected as shown in Figure 1, and the disconnector D
S1, DS, - containers are T type equipment BTI, Br3
and 2 form a rectangular shape via a U-shaped device BUt.

Although not shown, disconnectors DS+ and DS1'
An operation box for operating the earthing switches ES1, ES, - is provided inside the rectangular wire, and the area between the opposing disconnectors is set as an inspection circuit space. Operation boxes for the earthing switches ES2 and ES2- are provided on the circuit breaker CBI side.

Furthermore, the operation panel of each unit can be provided in the lower space S1 of the disconnector DS, - as shown in FIG.

In the gas-insulated switchgear of this embodiment having such a configuration, the circuit breaker and the lead-out line terminal are arranged outside the rectangular wire, so the inspection passage for the component equipment is limited to the space between the busbars and the circuit breaker. The back space can be limited. Therefore, the pitch between the circuit breaker unit and the outgoing line unit can also be minimized. Moreover, as a result, the entire gas insulated switchgear can be downsized, and the building volume can also be downsized. Also, the disconnectors DS1, DS, - and the earthing switch ES of the circuit breaker unit.

Since the ES+- are arranged facing each other and the inspection path can be secured in a straight line, the operability of each device is improved and maintenance and inspection work becomes easy.

It should be noted that the present invention is not limited to the embodiments described above, and the containers of the disconnector DS1 and the earthing switch ES+ connected to the circuit breaker CBI, and the containers of the disconnector DSr - and the earthing switch ES+ - are connected to the circuit breaker CBI. Since they are stacked one on top of the other, the earthing switches ES, ES, - can be operated from one operation box using one connecting rod with their respective main shafts facing each other. In addition, the grounding switch ES2 at the branch point of the outgoing line is connected to the outgoing line disconnector D.
Although it is stored in the S2 container, T-type and U-type equipment BT
1. BT2, BUI and circuit breaker unit disconnector DS,
, DS, -. In this case, the operation box of the earthing switch ES2 is arranged within a rectangular line. Further, the T-type and U-type devices may be provided with a disconnector DS2 for the outgoing line.

In addition, if terminal T1 of the outgoing line in FIG. 3, which is a view taken along the line E-E in FIG. In the opening/closing device, as shown in FIG. 7, the height from the floor surface can be increased by providing the outlet of the T-shaped device BT2 at the top and connecting the L-shaped device BL2. or,
By mounting the circuit breaker CB on the pedestal as shown in FIG. 8, the arrangement shown in FIG. 9 is obtained, and the height from the floor can be increased.

[Effects of the Invention] As described above, according to the present invention, the disconnectors at both ends of the circuit breaker are arranged above and below on a plane, and the disconnectors and T-shaped and U-shaped devices form a rectangular line. By placing circuit breakers and lead-out line terminals on the outside of the rectangular wire, we have created a gas-insulated switchgear that not only improves the operability and ease of maintenance and inspection of the equipment, but also makes it possible to downsize the equipment and reduce the building volume. can be provided.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the gas insulated switchgear of the present invention, FIG. 2 is a view taken along the lines D-D and H-H in FIG. 1, and FIG. E-E arrow view, Figure 4 is G in Figure 1
-C arrow view, FIG. 5 is a 1-1 arrow view in FIG. 1, FIG. 6 is a J-J arrow view in FIG. 1, and FIG. 7 is a modification of FIG. Fig. 8 is a view taken along line H-H showing a modified example of Fig. 2, Fig. 9 is a view taken taken along J-J showing a modified example of Fig. 6, and Fig. 10 is a view taken along arrow J-J showing a modified example of Fig. 6. A typical single-line connection diagram, FIG. 11 is a plan view showing an example of the arrangement of a conventional gas insulated switchgear, FIG. 12 is a view taken along arrow A-A in FIG. 11, and FIG. 13 is a view taken along B-- in FIG. 11.
A view taken along the line B and FIG. 14 is a view taken along the line C--C in FIG. 11. CB, ... circuit breaker, CT,, CT, ... current transformer, DS,, DS, --- circuit breaker, ES
,,,ES,”... Earthing switch for maintenance of circuit breaker, DS
2...Disconnector for outgoing line, ES2...Earth switch at branch point of outgoing line, ES2-...Earth switch for outgoing line, PT,...Instrument transformer, TI. 'ri-...Outgoing line terminal, BLI, BL2...
・L-type device, BT,, BT2...T-type device, BU,・
...U-shaped equipment.

Claims (1)

[Claims] A circuit breaker unit consisting of a circuit breaker and a disconnector connected to both ends of the circuit breaker is connected to the withdrawal line unit via a disconnector on the withdrawal line side, and furthermore, both units are connected alternately in series. In an annular gas-insulated switchgear connected to each other, the circuit breaker has two openings disposed substantially parallel to each other in the same direction above and below, and the disconnector is attached to these two openings. A circuit breaker unit is constructed by connecting the connection ends in opposite directions, and the drawing line unit is connected to the disconnector via a T-type device or a U-type device, and the same The circuit breaker units and the outgoing line units configured in Characteristic gas insulated switchgear.