JP2002305815A - Gas-insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the installation area of the whole apparatus, to shorten the length of bus-bars, and to enhance expandability. SOLUTION: A horizontal circuit breaker is arranged in a bushing lead line 43A, and a vertical circuit breaker is arranged in a transformer-side line 44A. The bus-bars of the bushing lead line and the bus-bars of the transformer-side line are arranged perpendicular to a main bus-bar 42A, and are arranged on a straight line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gas insulated switchgear having an improved arrangement of equipment.

[0002]

2. Description of the Related Art FIG. 1 shows an arrangement (plan view) of a conventional gas insulated switchgear disclosed in Japanese Patent Application Laid-Open No. 11-215628, and FIG. 2 shows a side view of a bushing lead-out line.

The gas insulated switchgear shown in FIG. 1 includes a bushing lead-out line 3A, a cable lead-out line 4A, a cable lead-out line 4C, a cable lead-out line 4B, and a bushing lead-out line 3B from the left (lower side in the figure). And are electrically connected to the main bus 1 respectively. The circuit breaker 5 is a vertical type for both the bushing outgoing line 3 and the cable outgoing line 4, and is arranged on the cable head side with respect to the main bus 1. As shown in FIG. 2, the electrical connection of the bushing lead-out line 3 is made from the main bus 1 via a vertical breaker 5A, passes through a disconnector 6A disposed above the main bus 1, and once falls, the bus 7A Is connected to the bushing.

[0004]

In the conventional arrangement, in order to secure an insulation distance between the upper end of the disconnector arranged above the main bus and the head of the bushing, the bus 7 of the bushing lead-out line is required.
A needs to be extended to dispose the bushing at a position distant from the main bus, which causes a problem that the installation area increases and the bus becomes longer.

In addition, since the bushing circuit breaker for the lead-out line is disposed on the cable head side with respect to the main bus, the cable lead-out line can be disposed only on the side of the bushing lead-out line. In other words, in the arrangement shown in FIG. 1, an arrangement space for five lines is required in the horizontal direction in order to arrange circuit breakers for five lines, and the main bus length becomes longer as the installation area in the horizontal direction increases.

When the bushing lead-out line is arranged on the bushing side, the bushing must be arranged farther from the main bus line than in FIG. 1 in order to secure an insulation distance between the upper end of the circuit breaker and the bushing head. The installation area in the vertical direction is further increased.

If another line is added on the bushing side with respect to the main bus, the installation area in the vertical direction is further increased.
When adding another line, it is necessary to extend the main bus and arrange it on the side of the line side line. However, in this method, the arrangement space becomes wider in the horizontal direction, and the main bus becomes longer.

An object of the present invention is to provide a gas insulated switchgear capable of reducing the installation area in the vertical and horizontal directions, shortening the busbar length, and improving the expandability.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to claim 1 is a bushing drawer in which a plurality of bushings arranged on one of a main bus and one of the main buses are electrically connected. In a power equipment consisting of a circuit and a cable lead-out line electrically connected to another power device lead-out part arranged on the other side of the main bus and the main bus, the circuit breaker of the bushing lead-out line is a horizontal type, and the circuit breaker of the cable lead-out line. Is characterized by being vertically arranged.

According to the first aspect of the present invention, the circuit breaker of the bushing lead-out line is disposed laterally on the bushing side with respect to the main bus, so that the disconnector and the bus passing above the main bus can be placed laterally of the main bus. Since the distance between the bushing head and the upper end of the disconnector becomes longer, the distance between the main bus and the bushing can be reduced, and the installation area can be reduced. In addition, the bus can be shortened.

According to the second aspect of the present invention, the bus of the bushing outgoing line arranged on the bushing side with respect to the main bus and the bus of the cable outgoing line arranged on the side of the other power equipment outgoing section are orthogonal to the main bus. By arranging them on a straight line, it is possible to share the leading part of the cable leading line and the leading part of the bushing leading line in the main bus. The space for arranging the conventional cable lead-out line can be set as the space for arranging the other lines, so that the expandability can be improved.

Further, by arranging the bus line of the bushing lead-out line and the bus line of the cable lead-out line on a straight line as described above, the space for arranging the conventional cable lead-out line becomes unnecessary, so that the gas insulated switch in the direction of the main bus line is required. The arrangement area of the entire apparatus can be reduced, and at the same time, the length of the main bus can be reduced.

In the first aspect, the bus bar of the bushing lead-out line and the circuit breaker are arranged obliquely, and in particular, by arranging the bus bar of the bushing lead-out line on a straight line connecting the main bus lead-out portion and the bushing, the bus length can be reduced. Can be achieved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 3 is a single-line diagram showing an embodiment of the gas-insulated switchgear according to the present invention, and FIG. 4 is a plan view showing a first embodiment of the gas-insulated switchgear based on the single-line diagram of FIG.
FIG. 5 is a side view showing a bushing lead-out line and a cable lead-out line in FIG.

As shown in FIGS. 4 and 5, the main bus 42A
, A bushing lead-out line 43A including a vertical breaker 45A is disposed on the bushing 84A side, and a cable lead-out line 44 including a horizontal breaker 46A is disposed on the other power equipment lead-out side.
A is arranged. The bushing lead-out line 45A and the main bus 42A are connected by a bus 47A, and the bus 47A and the bus 48A of the cable lead-out line are orthogonal to the main bus 42A and arranged on a straight line.

As described above, the circuit breaker 45A of the bushing lead-out line 43A is vertically arranged, and the bushing lead-out line 43A
Since the bus 47A is connected to the side of the main bus 42A, the distance between the upper part of the bus 47A and the head of the bushing becomes longer, the bushing can be arranged closer to the main bus, and the installation area can be reduced. Become.

Further, since the circuit breaker 46A of the bushing lead-out line 43A is of a horizontal type, the circuit breaker 46A can be placed on the bushing side and the cable lead-out line 44A can be placed on the other power equipment lead-out side. A space is created between the cable outlet lines 44A and 44C. This space can be used for adding another line as shown in FIG.

FIG. 7 is a plan view showing another embodiment of the gas insulated switchgear based on the solid line diagram of FIG.

In the embodiment shown in FIG. 7 (second embodiment), FIGS.
In the embodiment shown in FIG. 6 (first embodiment), the space for addition is eliminated, and the main bus length is reduced and the installation area is reduced. In the second embodiment, the main bus length can be reduced by about 40% and the installation area can be reduced by about 22% compared to the first embodiment.

An embodiment according to claim 3 is shown in a plan view of FIG.

In FIG. 8, the bus 8 of the bush lead-out line is drawn on a straight line connecting the main bus lead-out portion 83A and the bushing 84A.
By arranging 1A and 82A, the bus length can be reduced. In the embodiment of FIG. 8, the bus length can be reduced by about 29%. This embodiment can be implemented in either the first embodiment or the second embodiment.

The present invention is not limited to the above embodiments, and the shape, material, quantity, etc. of each device can be changed as appropriate. For example, the main bus may be a phase-separated main bus instead of a three-phase package.

[0024]

As described above, according to the first aspect of the present invention, the arrangement area can be reduced by arranging the horizontal type circuit breaker and the vertical type circuit breaker in combination.

According to the second aspect of the present invention, the bus line of the bushing lead-out line and the bus line of the cable lead-out line are orthogonal to the main bus line and are arranged on a straight line, thereby improving the expandability of the gas insulated switchgear. Or reduction of installation area,
The main bus length can be reduced.

According to the third aspect of the invention, by arranging the circuit breaker and the bus of the bushing lead-out line obliquely with respect to the main bus, the bus length can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a conventional gas insulated switchgear.

FIG. 2 is a side view showing a conventional gas insulated switchgear.

FIG. 3 is a single-line diagram showing an embodiment of the gas-insulated switchgear according to the present invention.

FIG. 4 is a plan view showing the embodiment (Example 1) according to FIG. 3;

FIG. 5 is a side view showing the embodiment (Example 1) according to FIG. 3;

FIG. 6 is a plan view in which additional lines in FIG. 4 are arranged.

FIG. 7 is a plan view showing the embodiment (Example 2) according to FIG. 3;

FIG. 8 is a plan view showing another embodiment of the present invention.

[Explanation of symbols]

 42A: Main bus, 43A: Bush outgoing line, 45A: Vertical breaker, 44A: Cable outgoing line, 44C: Cable outgoing line, 45A: Bushing outgoing line, 46A: Horizontal breaker, 47A: Busbar, 48A: Cable Bus line of the lead-out line, 83A: Main bus lead-out portion, 84A: Bushing, 81A, 82A: Bus line of the bushing lead-out line.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 5G017 AA01 BB20

Claims (3)

[Claims] 1. A gas insulated switchgear having a main bus, a bushing lead line, and a cable lead line, wherein the bushing lead line is disposed on one of the main buses, and the cable lead line is disposed in the opposite direction. A gas-insulated switchgear, wherein the circuit breaker of the bushing lead-out line is a horizontal type, and the circuit breaker of the cable lead-out line is a vertical type. 2. The gas insulated switchgear according to claim 1, wherein a bus bar of the bushing lead-out line and a bus bar of the cable lead-out line are orthogonal to the main bus line and arranged on a straight line. 3. The gas insulated switchgear according to claim 1, wherein a breaker and a bus of the bushing lead-out line are arranged obliquely with respect to the main bus.