JPS6025120A - Gas insulated switching device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention 1] The present invention relates to a double-bus type gas insulated switchgear (hereinafter referred to as GIS) which is an improved layerer.

[Technical Invention 1! ! I'l and its problems] In GIS, the energized part is covered with a solid insulator, an insulating support is placed in a grounded metal container, and a gas with excellent insulation performance, such as SF6 gas, is sealed inside the metal container. This is a switchgear that reduces the size of equipment by reducing the size of the equipment, and its adoption in power generation and substations is increasing due to the rise in land prices in recent years.

Conventionally, in the so-called bushing lead-out line where the connection to the outside is made at the bushing part as shown in Fig. 1,
The circuit breakers 18 and 2a were arranged such that their tank axes were at right angles to the axis of the main busbar 3.4. That is, A C
1 line 3. The first bus line 4 is connected to the first bus line disconnector 5a, which is provided at the top of the opening of the circuit breaker 1a through connection buses 7a and 7b.
It is connected to the Otsufune line disconnector 6a. In this case, G.I.
The line direction of S, that is, the length in the direction perpendicular to the axis of the main FTL line 3.4 increases, and the installation area of the GIS increases, especially when the GIS is installed indoors. Due to the increase in size, the construction cost, including the cost of 1q of land for installation, was enormous. Further, a connection busbar 7a connects the disconnectors for the busbars, such as the first busbar 3a and the second busbar 4a.

7b were arranged independently, so an increase in the busbar length was unavoidable. Furthermore, by arranging the connection busbars 7a and 7h in two stages, upper and lower, the upper busbar 3 will be installed at a higher position, making the entire GIS higher-rise and causing a problem of deterioration in seismic performance, so the bushing 9 The bridge 10 must be a strong structure, and the GI
The manufacturing costs for S were also enormous. Sho 8
is a current transformer.

[Object of the Invention] The present invention has been made in view of the above points, and aims to rationalize the arrangement of circuit breakers, the opening position of circuit breakers, and the arrangement of busbars connecting bus disconnectors and circuit breakers, and to reduce the size of GIS. The purpose of this invention is to obtain a gas insulated switchgear that reduces manufacturing and installation costs.

[1 Defeat of the Invention 1 In order to achieve the objective 1, according to the present invention, the 1st and 2nd layers are stacked in 2 layers 1) 1.: A, B and n A circuit breaker whose directions are parallel to each other is arranged, and the sunrise portions for connection to the main bus side and the first steering side of this circuit breaker are located diagonally on both sides of the circuit breaker container. ”, it is set in sea urchin.

[Embodiments of the Invention] Examples of the present invention will be described below with reference to FIGS. 2 and 3. The main busbars 3a, 31+, 3c and 4a, 41.71c of the three phases A and Otsu are parallel to each other, and A and Otsu 1'! ]
Arrange the wires so that they are on the ground and the bottom two levels (^).On the other hand, on both sides of the main lines 3 and 4 in the axial direction, there are three disconnectors 1a for each phase.
, ill, 10 and 2a, 2b, 2c are arranged. In other words, the circuit breakers 1 and 2 are connected to +1iJ line 3 in the immediate breaking action axis direction of A.
, 4 has a so-called horizontal grounded tank-type configuration parallel to the axial direction of the circuits 1a, ib, ic, and U.
2a, 2b, and 2c are arranged in a straight line with each other. Moreover, the circuit breakers 1 and 2 are located on the same axis via the main bus 3.4. On the other hand, the circuit breakers 1 and 2 each have a pair of sunrise portions 5.6 on the same plane with the tank axis of the circuit breaker sandwiched between both sides of the circuit breaker container, and the sunrise portions 5.6 of each other are diagonally oriented. It is set up so that it is located at and each phase) circuit breakers 1a, 1b, 1c and 2a, 2b.

2C is arranged so that the same sunrise portions of adjacent circuit breakers are separated from each other. A bushing 9 established in a bushing frame 101 is connected to the outlet portion 6 of each circuit breaker 1.2 via a connection bus bar. The other sunrise section 5 connects each main bus 3 via a current transformer 8, a connection bus 7 and a disconnector 11.12.
, 4. That is, to explain the circuit breaker 1a, the lead part 5 connects to the main bus 3 via the current transformer 8a, the connection bus 71a, and further via the disconnector 11a that constitutes the disconnector 11.
connected to a. Further, it is connected to the main bus 4a via a disconnector 12a that constitutes a disconnector 12.

Each disconnector 11a and 128 is connected to the main bus 3a.

It is arranged between main bus lines 3a and 4c on the vertical line connecting lines 4a. On the other hand, the sunrise section 5 of the circuit breaker 2a is the main bus bar 3c.

5- It is guided between the main lines 3a, 41) through the connection bus 72a arranged perpendicularly to the main bus between 3b, 4c and 7Ib, and is connected to the main buses 3a and 4b via a disconnector. Ru. Similarly, curved and polyphase circuit breakers are also connected to the respective main busbar.

According to the GIS of the layerer I configuration of the present invention described above,
Main bus line 3. The circuit breaker 1.2 is arranged parallel to the axial direction of the circuit breaker 1.2, and the circuit breaker outlet parts 5 and 6 are arranged on the side surface of the circuit breaker container on almost the same plane with the tank axis of the circuit breaker 1.2 in between. Because they are arranged diagonally within the GIS layout, the length in the line direction can be made extremely short compared to the conventional GIS layout. As a result, the installation area is significantly reduced, especially in GIS systems with a large number of bushing lines, contributing to a significant reduction in construction costs. Next, the disconnecting switches 11 and 12 for the A and 6 river lines are arranged approximately on the vertical line between the two stacked A and B main buses 3 and 4, so conventionally they were placed directly above the circuit breakers. The connecting wires, which were connected to the main bus line separately for the disconnectors for the A and B bus lines, are shared by the A and B main bus lines, and can be connected almost horizontally to the circuit breaker eye 5. As a result, the arrangement of the master bus line 3 in particular is lowered, and the entire GIS is lowered in height. In particular, by making it possible to lower the number of bushings, seismic performance is improved, and the structure (not shown) supporting the middle main bus bar 3 and the bushing bridge 10 can also be simplified, significantly reducing the cost required for GIS manufacturing and installation. can be reduced to In addition, FIGS. 4 and 5 show other embodiments of the present invention, in which the main busbars 3 and 4 are of a three-phase integrated structure. The device can be further downsized than the embodiment shown in the figure. In the figures, the same parts as in FIGS. 2 and 3 are denoted by the same reference numerals, and their explanations are omitted.

[Effects of the Invention] As explained above, according to the present invention, the circuit breakers of each phase, which are stacked in two stages, upper and lower, whose operating axis direction is parallel to the axial direction of the A and B main busbars, are connected to each other. The circuit breakers are placed in a straight line, and the eyelets for connection to the main bus side and bushing side of each phase circuit breaker are placed diagonally on both sides of the circuit breaker case. Since one sunrise section is connected to the main bus bar through a disconnector, and the other sunrise section is connected to the insulation lead-out means, the main busbar can be arranged low, and seismic performance can be improved. Furthermore, by making the overall structure lower, the frame structure etc. can be simplified, and an economical gas insulated switchgear can be provided.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of a conventional device, FIG. 2 is a side view showing an embodiment of the present invention, FIG. 3 is a plan view of FIG. 2, and FIGS. 4 and 5 are views of the present invention. It is a side view and a top view showing other examples. 1a, 111, 1c, 2a, 2b, 2cm...breaker, 3a, 31), 3c, 4a, 4b, 4a...main bus bar, 5.6-...=exit, 7.71a, 71b, 71c
. 72a, 72b, 72cm... Connection bus bar, 8a, 8
b. 8G... Current transformer, 9... Bushing, 10... Frame, 11.12... Disconnector. Applicant's agent Patent attorney Takehiko Suzue＼

Claims (1)

[Claims] (1) In a gas-insulated switchgear with a double busbar system equipped with A, 6F busbars, the middle and 6 main busbars are stacked in two layers above and below, parallel to the axial direction of the main busbars. Each phase circuit breaker having the operating axis direction of its interrupting part is arranged approximately parallel to the main bus bar, and the main bus side sun-light part and the insulation lead-out means side sun-shape part provided on each phase circuit breaker are Gas vents are arranged diagonally on both sides of the circuit breaker container in substantially the same plane, with one sunrise part connected to both main busbars via a disconnector, and the other sunrise part connected to an insulated lead-out means. Insulated switchgear. ('2J) The gas insulated switchgear according to claim 1, wherein the disconnector connected to both main busbars is arranged on the substantially vertical line between the two main busbars, which are arranged substantially on the same vertical line.