JPWO2020065748A1 - Switch gear - Google Patents

Abstract

Among the installation work of the switch gears arranged in two stages, in the conductor connection work between the switch gears in the lower stage, a switch gear capable of performing the work without removing the bus is obtained. A switch gear (1) in which a circuit breaker (10) is stacked in two stages on the upper and lower stages of the switch gear (1), the width direction is longer than the thickness direction, the switch gear (1) has a flat surface, and the switch gear (1) is laterally arranged. It is characterized by having a main bus arrangement structure in which the three extending main bus lines (4b) in the lower row are arranged in parallel in the vertical direction with the flat surfaces facing each other.

Description

The present application relates to a switch gear in which circuit breakers are stacked in two stages.

The switch gear in which the circuit breakers are stacked in two stages can significantly reduce the space required for arrangement as compared with the conventional switch gear having a structure having only one circuit breaker, and is effective as a space-saving switch gear. Is.
In the installation work of the switch gear in which the circuit breakers are stacked in two stages, the main bus connected to the upper circuit breaker works from the ceiling of the switch gear, and the main bus connected to the lower circuit breaker is the switch. The connection work is performed from the back surface of the gear (see, for example, Patent Document 1).

Japanese Patent Application No. 2018-517909

In the installation work of the switch gear in which the circuit breakers are stacked in two stages, when the main bus connecting to the lower circuit breaker is connected between the adjacent switch gears, as described above, the connection work is generally performed from the rear of the switch gear. I do. At this time, it is necessary to remove the main bus conductor to which the power cable is connected, which requires a high technical level and has a problem that it takes a long time.

The present application has been made to solve the above-mentioned problems, and an object of the present application is to make it possible to easily perform the main bus connection work in a short time in the switch gear installation work.

The switch gear of the present application is a switch gear in which circuit breakers are stacked in two stages on the upper stage and the lower stage of the switch gear, and the width direction is longer than the thickness direction, has a flat surface, and extends in the lateral direction. The lower three main bus lines have a main bus line arrangement structure in which the flat surfaces face each other and are arranged in parallel in the vertical direction.

In the installation work of the switch gear of the present application, the work of connecting the main bus conductor can be easily performed in a short time.

It is a side sectional view of the switch gear in Embodiment 1. FIG. It is a layout drawing of the main bus and the power cable connecting conductor observed from the XX cross section of FIG. It is a perspective view of the support frame which holds a main bus. It is a perspective view which shows the arrangement of the main bus bar and the branch bus bar observed from the YY cross section of FIG.

In the description of the embodiment and each figure, the parts with the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
Hereinafter, the arrangement of the main bus of the switch gear of the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a side sectional view of the switch gear of the present embodiment, and FIG. 2 is a layout diagram of the main bus and the power cable connecting conductor when observed from the XX cross section of the switch gear.

As shown in FIG. 1, the switch gear 1 has a two-stage stacking arrangement in which circuit breakers 10 are provided in the upper and lower stages, and three-phase main buses 4a and 4b are provided in the upper and lower stages. In FIG. 1, the switch gear 1 has an operation surface 11 arranged on the left side, and is provided with a circuit breaker 10 and a control chamber 8 in portions adjacent to the operation surfaces of the upper and lower stages.

On the other hand, there is a back door 9 at the right end, and a cable chamber 3 is arranged inside the back door 9. In the upper and lower cable chambers 3, a power cable connecting conductor 5 to which a current transformer 13 is attached is connected to a ground switch 12.

The main bus chamber 2 is arranged in the upper and lower stages of the central portion of the switch gear 1. Although the main bus bars 4a and 4b are shown as rectangular cross-sectional shapes in FIG. 1, they are rod-shaped conductors having a flat surface that is longer in the width direction than in the thickness direction and extends long in the vertical direction of the paper surface. There is.

In the present embodiment, the upper main bus 4a is arranged in a triangle, and one of the three main bus 4a is arranged in the front direction of the switch gear 1. In the case of the arrangement of the main bus 4a, the installation work can be performed relatively easily by performing the connection work from the upper surface of the switch gear 1.

On the other hand, the lower main bus 4b needs to be installed from the back surface of the switch gear 1. If the lower main bus 4b is also arranged in a triangle as in the upper line, it is difficult to connect the main bus 4b arranged in the front direction of the switch gear 1 from the back surface, and a part of the main bus 4b is removed. It is necessary to perform the connection work, a high technical level is required, and a long working time is required.

However, in the present embodiment shown in FIG. 1, the lower main bus 4b is attached in an arrangement extending vertically to the paper surface with the flat surfaces facing each other, and the three main bus 4b are attached. It differs from the conventional three-sided main generatrix arrangement in that it is arranged in parallel in the vertical direction.

The relationship between the arrangement of the main bus 4b and the power cable connecting conductor 5 is as shown in FIG. 2 when the XX surface of the switch gear 1 is observed from the back surface.
As shown in FIG. 2, the power cable connecting conductor 5 is common to the main bus 4b in that it is a rod-shaped conductor having a flat surface. However, three of the power cable connecting conductors 5 are attached side by side in the lateral direction with the flat surface facing the front-rear direction of the device, and the arrangement is orthogonal to the arrangement of the main bus 4b.

That is, in the present embodiment, as can be seen from FIGS. 1 and 2, three main bus bars are on the back side (the back side of the paper surface of FIG. 2) of the three power cable connecting conductors 5 arranged in the horizontal direction. The 4b are arranged in the vertical direction, and in the installation work, the main bus 4b can be connected from the back surface side through the gap of the power cable connecting conductor 5. Therefore, the installation work can be easily carried out without the need for removing the main bus 4b or the like.

In the present embodiment, each of the three main bus lines 4b extends in the horizontal direction and is arranged in the vertical direction with the flat surfaces facing each other, as described with reference to FIG. As with the main bus 4b, it is necessary to take out and arrange three branch bus 6s that connect each main bus 4b and the circuit breaker 10 and the like side by side, and secure a sufficient insulation distance between them and the main bus 4b. It is difficult to arrange the branch bus 6 and the branch bus 6. Further, the lower main bus 4b is arranged so that the main bus 4b are arranged closer to each other as compared with the conventional configuration of the triangular arrangement, and it is expected that the influence of the electromagnetic force between them will be large. The correspondence to these problems in this embodiment will be described mainly using FIGS. 3 and 4.

In the case of the present embodiment in which three main bus lines 4b are arranged in the vertical direction, the influence of the electromagnetic force is expected to appear most on the central main bus line 4b among the three lines. Therefore, as shown in FIGS. 2 and 4, an iron support frame 7 having particularly increased strength was used in mounting the central main bus 4b.

FIG. 3 shows a perspective view of the support frame 7. The support frame 7 is made of iron, and its strength can be increased by bending its four sides. Two screw holes formed on the left and right sides of the support frame shown in FIG. 3 are used to fix the main bus 4b located at the center of the three via the insulator 14.
By using this support frame 7, the main bus 4b can be firmly attached, and the influence of electromagnetic force can be dealt with.

FIG. 4 is a perspective view of the lower main bus chamber 2 observed from the YY cross section of FIG. 1, showing the arrangement of the main bus 4b and the branch bus 6. As described above, each main bus 4b has a flat rod shape and extends in the lateral direction of FIG. Further, the three main bus lines 4b are arranged linearly in the vertical direction with the flat surfaces facing each other.

A branch bus 6 is connected to each main bus 4b.
The main bus 4b and the branch bus 6 are connected to each other at different positions without overlapping the lateral positions of the main bus 4b and the branch bus 6. That is, in the example of FIG. 4, the top main bus 4b is on the right side, the bottom main bus 4b is on the left side, and the center main bus 4b is in the center, and the main bus 4b and the branch bus 6 are connected. ..
As a result, the gaps between the main bus 4b, between the branch bus 6, and between the main bus 4b and the branch bus 6 can be increased, and the influence of mutual electromagnetic force can be reduced.

It is important that the connection positions of the three main bus bars 4b and the branch bus bars 6 do not overlap in the lateral direction and are different positions, and as described above, they do not necessarily have to be left and right and the center. Further, the intervals do not have to be even, and the connection positions may be biased to the right or left side. Further, the relationship between this connection position and the arrangement of the power cable connecting conductor 5 adjacent to the main bus 4b is not particularly limited, and coincides with the position where the main bus 4b and the power cable connecting conductor 5 overlap and intersect. Alternatively, the connection position between the main bus 4b and the branch bus 6 may be arranged in the gap portion of the arrangement of the power cable connection conductors 5.

Of the three main busbars 4b, the main busbar 4b located at the center is fixed to the iron support frame 7 via the insulator 14 as described above. Therefore, there is a concern that the branch bus 6 connected to the main bus 4b and the support frame 7 are close to each other, and the influence of the electromagnetic force is increased as compared with the other main bus 4b. Therefore, in the present embodiment, the branch bus 6 has a shape that is bent downward so as to pass a position away from the support frame 7, and the support frame 7 also secures a distance from the branch bus 6. Therefore, a part is concave.

In the present embodiment, as shown in FIG. 3, the concave shape formed on the support frame 7 is trapezoidal, but the present invention is not limited to this, and a concave shape such as a square or a circle may be used. it can. Further, in the present embodiment, one concave shape is provided, but a plurality of concave shapes may be provided as needed.

In this way, by providing the support frame 7 with a concave portion and forming the branch bus 6 in a bent shape away from the support frame 7, it is possible to maintain a large insulation distance between the support frame 7 and the branch bus 6. The influence of electromagnetic force can also be reduced.

As described above, in the switch gear 1 in which the circuit breakers 10 of the present embodiment are arranged in two stages, the three main bus bars 4b are arranged in the vertical direction with each other extending in the horizontal direction, and the respective electric powers are arranged. By arranging the cable connection conductors 5 in the vertical direction and arranging them in the horizontal direction, it is not necessary to remove the main bus 4b in the installation work, and the work can be easily performed.

At the same time, the influence of the electromagnetic force can be reduced by setting the connection positions of the main bus 4b and the branch bus 6 to different positions so as not to overlap each other when viewed in the lateral direction.

Further, the central main bus 4b is fixed with high strength by using an iron support frame 7, and a recess is provided in the support frame 7 at a portion close to the branch bus 6 and the support frame 7, and the branch bus 6 is supported by the support frame. By forming a bent shape away from 7, the insulation distance can be maintained large and the influence of electromagnetic force can be prevented.

Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in the embodiments are not limited to the application of a particular embodiment. , Alone, or in various combinations, are applicable to embodiments.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 switch gear, 2 main bus chamber, 3 cable chamber, 4a, 4b main bus, 5 power cable connection conductor, 6 branch bus, 7 support frame, 8 control room, 9 back door, 10 circuit breaker, 11 operation surface, 12 Ground switch, 13 current converter, 14 busbar.

The switch gear of the present application is a switch gear in which circuit breakers are stacked in two stages on the upper stage and the lower stage of the switch gear, and the width direction is longer than the thickness direction, and the circuit breaker has a flat surface and extends in the lateral direction. It has a main bus arrangement structure in which the three main bus lines arranged in the lower stage of the switch gear are arranged in parallel in the vertical direction with the flat surfaces facing each other, and connects the three main bus lines and the circuit breaker. The positions where the branch bus wires of the book are connected to the three main bus bars are different from each other in the horizontal direction, and correspond to the gaps between the three power cable connection conductors arranged side by side in the horizontal direction .

Claims (5)

A switch gear in which circuit breakers are stacked in two stages, one on the top and one on the bottom of the switch gear.
Three main generatrix arranged in the lower stage of the switch gear having a flat surface extending in the horizontal direction and having a width direction longer than the thickness direction are arranged in parallel in the vertical direction with the flat surfaces facing each other. A switch gear characterized by having a main bus arrangement structure. The first aspect of claim 1, wherein the positions of connecting the three branch bus lines connecting the three main bus lines and the circuit breaker to the three main bus lines are different from each other in the lateral direction. Switch gear. The claim is characterized in that the lateral position for connecting the three branch busbars to the three main busbars corresponds to the gap portion of the three power cable connecting conductors arranged side by side in the horizontal direction. The switch gear according to 2. Claim 2 or claim, wherein the main bus line located at the center of the three main bus lines arranged in parallel in the vertical direction is fixed to a metal support frame via a gear. The switch gear according to 3. The switch gear according to claim 4, wherein a recess is formed at a position adjacent to the branch bus of the metal support frame.

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