JPS6149605A - 3-phase simultaneous 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] The present invention relates to a 3-phase gas-insulated 8-position gas-insulated open circuit in which a current-carrying conductor for connecting a multi-bus bar is arranged in a container housing a breaker. be.

[Technical background of the invention rA1 Substations installed around large cities or coastal areas or 17
In closed spaces, gas insulated switchgear is used, which has the advantage of being useful in terms of land acquisition and M-book measures.

This type of gas-insulated open circuit equipment is becoming increasingly high-voltage and large-capacity as the demand for electricity increases in urban areas, and there is a demand for further downsizing, improved reliability, and simplified maintenance. It's been done. Therefore, other functions are incorporated into one binding device to reduce the total number of containers, thereby reducing the cost by 1 or more and reducing the installation space.

An example of the gas insulated switchgear as described above will be explained with reference to FIGS. 4 to 6.

Figure 4 shows a single-line connection diagram for the double bus system - 11 minutes.Disconnectors DS1 and DS2 are installed on the main buses BUS1 and BUS2, respectively, and the switches 1b and 1b are The t+ff/i transformer CB is connected to the grounding device ES, the potential transformer PT, and the cable connection CH via the π1 current transformer CT and the line disconnector DS3.

Conventionally, as a typical example of the arrangement of equipment in such a single-line diagram, there is known a structure shown in FIG. 5 of U.S. Pat. No. 4,241,379.

In the same figure, a container 22 of a circuit breaker 21 is installed horizontally to a surface and is filled with insulating gas. Current-carrying conductors 24 and 25 for each phase are led out from both ends of 23, respectively.

One current-carrying conductor 25 has a breaker section 2 inside the container 22.
The three terminals are arranged parallel to each other and branched into two, each of which is led out from two outlet terminal portions 29 and 30 provided at the top of the container 22 in a direction orthogonal to its axis. That is, one current-carrying conductor 2 branched from the current-carrying conductor 25
6 is perpendicular to the axis of the container 22 from the outlet terminal part 29 to Q.
The hydraulic current-carrying conductor 27 is parallel to the axis, and its tip is bent in the orthogonal direction to form the 10-output terminal portion 3.
It is derived from 0. And each sunrise terminal part 29.
30 is integrated with a disconnector (14 main busbars 30°, 31
It is connected to the.

In addition, the through 7R conductor 24 derived from the other side of the U
81 current transformer 3 arranged coaxially with fI section 23
3 from an outlet terminal portion 28 provided in the axial direction of the container 22, and further connected to a grounding device 35, an instrument transformer 36, and a cable connecting portion 37 via a disconnector 34.

[Problems with backweight technology] However, the configuration of such a conventional three-phase integrated gas insulated switchgear has the following drawbacks.

That is, FIG. 6 is a plane view taken along arrow E-EITI in FIG. 33R133 King is container 2
The remaining one-phase instrument current transformers 3 are arranged on the same horizontal plane as the axial center O of 2 and facing each other at equal distances from this axial center O.
38 is the same as the axis O of the container 22! Il! It is arranged at the same distance from the two-phase instrument current transformers e33R and 33T on a straight plane.

That is, in the three-phase instrument current transformer 33, each axis forms an isosceles triangle on a cross section perpendicular to the container 22,
Further, the isosceles triangle is arranged so that one side intersects with the axis 0 of the container 22.

However, when such an arrangement 4i-'J is adopted, a wasted space is created above the instrument current transformer 33 as indicated by a chain double-dashed line F in the figure. In addition, the diameter d3 of the instrument current transformer 33
is limited, and in order to have a constant capacity of 1q, the axial length! L2 has to be made longer, which makes the overall appearance less noticeable. As a result, the installation space for gas-insulated switchgear will increase, but even a slight increase in groin space will increase construction costs, especially for underground substations located underground in J3 buildings in urban areas. The increase in equipment size has become a major problem as it leads to a premature increase in the amount of equipment.

[Object of the Invention] The present invention was proposed in order to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to improve the current transformer arrangement in particular. To provide a three-phase integrated gas insulated switchgear that can effectively utilize space, downsize the entire device, reduce the installation space of a device Vj, and significantly reduce construction costs.

[Summary of the Invention] The three-phase collective type gas insulated open IA Fi of the present invention connects 31 current transformers for each of the three phases arranged in a container to each +h
By arranging the t+ center to form an equilateral triangle on the rJJi plane perpendicular to the vessel, the diameter of the instrument current transformer can be expanded compared to the conventional isosceles triangular arrangement, and therefore the diameter of the instrument current transformer can be increased in the axial direction of the vessel. By reducing the length of the container, the space inside the container is utilized without wasting it, and the overall quality of the device is reduced.

[Embodiments of the Invention] Examples of the three-phase all-in-one gas insulated switchgear according to the present invention as described above will be specifically described with reference to FIGS. 1 to 3.

In FIG. 1, a container 2 of a circuit breaker 1 is arranged horizontally, and the inside of the container 2, which is filled with insulating gas, contains a container for each phase.
The 5I07 section 3 is arranged in the same Qq1 direction as the container, and current-carrying conductors 4.5 are led out from both sides of the 1q L'R section 3, respectively.

One current-carrying conductor 5 is arranged parallel to the L/p section,
It is branched into two to form a current-carrying conductor 6.7, which is led out from two lead terminal portions 9 and 10 provided above the container 2 in a direction orthogonal to the container 2.

The other current-carrying conductor 4 is led out from an outlet terminal portion 8 provided at the end of the container 2 in the axial direction of the container 2 via a measuring current transformer 13, and is further led out via a disconnector 14. , grounding device 15, instrument transformer 16 and cable connection section 17
is connected. Main busbars 11 and 12, which are integrated with disconnectors, are connected to each of the sunrise terminals 9 and 10, respectively.

Next, a more detailed explanation will be given using FIGS. 2(A) and 2(B). Note that FIG. 1A is a plane view taken along arrows Δ-A IIJi taken along a plane perpendicular to the axis of the container 2 in FIG. 1, and FIG. 1B is a view taken along arrows B-B 1tJi.

In the same figure (A>, the current-carrying conductors of each phase are 5R05S and 5T.
are arranged on substantially the same plane parallel to the axis of the container 2 and spaced from each other at equal intervals dl.

The axial centers of the two phase breaker parts 3R and 3T face the axial center O of the container 2 on the same horizontal plane and are located at equal intervals from the axial center O. The remaining one phase 15 section 3S is located at the axis O of the container.
is placed on the same vertical plane. That is, the three cutoff parts 3R to 3 are arranged so that, on a cross section perpendicular to the axis, their axes form an isosceles triangle, and the - side intersects with the il + 1 + center O of the container 2. ing.

M1=, In the same figure (B), the instrument current transformer 11R of each phase,
11S and 11T are arranged such that their axes form an equilateral triangle, and this equilateral triangle is inscribed in a circle centered on the axis O of the container 2.

By arranging the instrument as described above, the space inside the container 2 can be used effectively and the diameter d2 of the instrument current transformer 11 can be made larger than before, so that the instrument current transformer 11 shown in FIG. By shortening the axial length l+ of No. 11, the overall quality can be reduced.

Therefore, the space inside the container can be effectively used to reduce the size of the entire device, and the installation space of the enclosure can be reduced, so construction costs can be significantly reduced, especially when installing in the basement of a high-rise building. Can be reduced.

According to the present invention, the above-described embodiment can also be applied to a vertical arrangement as shown in FIG.

In the same figure, the container 2 of the container 1 is vertically placed i-:
The five openings of this container 2 are arranged in vertical rows on the side of the container 2, and are both oriented in the horizontal direction.

Accordingly, the arrangement of the current-carrying conductors 4.5 of each phase led out from both ends of the breaker 3 and the breaker 15 is also shifted in the vertical direction accordingly. One current-carrying conductor 5 is branched into two to form a current-carrying conductor 6.7, and these current-carrying conductors 9 and 10 are connected to each other from an output terminal portion 9.10.
The other current-carrying conductor 4 is bent in the horizontal direction via an instrument current transformer 13 which is also provided in the vertical direction, and is led out from the lead terminal portion 8.

The line-side disconnect switch 14 and the main bus bar 11.12 integrated with the disconnect switch are also arranged vertically in line with the positions of the output terminal parts 8 to 10, and are connected to the respective output terminal parts 8 to 10. The disconnector 14 is further connected to the cable connection 17 via the grounding device 15 . Further, the tI transformer 16 has a cable connecting portion 17.
, so that the heights of the I days are approximately the same.

In addition, arrow view C-Cl! The arrangement of the breaker 3 and the current-carrying conductor 5 and the arrangement of the instrument current transformer 13 at J5 in the 7i plane view and the cross-sectional view taken along the arrow D-D are as shown in the arrow A shown in Fig. 2 (A>(B)). - 8th side view and arrow view B - B Same as IFF side view - IM
It is being made into

Therefore, in this embodiment as well, as in the previous embodiment, the space inside the container 2 can be used effectively without waste, and a) the n-diameter of the transformer 13 can be expanded and its length can be shortened. In particular, in this embodiment of the assembled type, the height of the container is reduced, and the equipment is made smaller. Similar to the example.

[Results of the Invention] As explained above, the present invention provides a method for reducing the length of an instrument current transformer by effectively utilizing the space inside the container. Because it has become possible to downsize, it is possible to provide a three-phase integrated gas insulated open-air system that can reduce the installation space and significantly reduce construction costs, especially when installed underground in a high-rise building.

[Brief explanation of drawings]

1 to 3 are diagrams showing an embodiment of a three-phase finger-shaped gas insulated switchgear according to the present invention. FIG. 1 is a sectional view showing one embodiment, and FIG. 2 (A>(B) Fig. 1 is a cross-sectional view taken along the line △-octahedral and a view taken taken along the line B-B shown in Fig. 1, Fig. 3 is a sectional view showing another embodiment, and Figs. 4 to 6 are a conventional gas-insulated switchgear. Fig. 4 is a single line diagram showing an example of a gas insulated switchgear with a double bus system, Fig. 5 is a sectional view showing an example of its arrangement (14 configurations, and Fig. 6 is a It is a sectional view taken along arrow Fi-E of 1... 15 disconnector, 2... container, 3... interrupting part, 4-7... energizing conductor, 8-10... lead terminal. Part, 11゜12...Main m line, 13...Current transformer, 14.
...[fIi road device, 15...Earthing device, 16...4
dexterity transformer, 17...cable connection part. 7317 Representative Jy Patent Attorney Near Keni 4i (1 other person) Fig. 1 Fig. 2 (A) (B) Fig. 3 Fig. 4 Fig. 5 [IZl Fig. 6

Claims (1)

[Claims] (1) A 3-phase integrated type in which a 3-phase interrupter with fixed and movable electrodes that can move toward and away from each other is arranged parallel to the axis of the container in a container filled with insulating gas. In a gas-insulated switchgear, one of the current-carrying conductors led out from both ends of the breaker of each phase is arranged parallel to the breaker in the container, and is branched into two and installed in the container. The other current-carrying conductor is led out from the first and second outlet terminals provided in the breaker section, and the other current-carrying conductor is connected to the first and second lead terminals provided in the container through instrument current transformers for each phase arranged in the direction of the operating axis of the breaker. Further, when viewed from a cross section orthogonal to the container axis, the breaking portions of each of the three phases are arranged such that their axes form an isosceles triangle; A three-phase integrated gas-insulated switchgear characterized in that the instrument current transformers for each phase are arranged so that their axes form an equilateral triangle.