JPH0245406B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a gas insulated switchgear using an insulating gas such as SF ₆ gas, and in particular,
Pertains to gas-insulated switchgear used in multi-bus substations, switchyards, etc.

[Technical background of the invention and its problems] In substations or switchyards that are installed around large cities or coastal areas, the electrical power that makes up the substation or switchyard is Gas insulated switchgear is used in which the equipment is sealed with an insulating medium such as SF ₆ gas. This type of gas-insulated switchgear is becoming increasingly high-voltage and large-capacity as the demand for electricity increases in urban areas, and there is a demand for further miniaturization, improved reliability, and simplified maintenance. has been done. Therefore, disconnectors, disconnectors, and other necessary equipment are arranged three-dimensionally, and the distance between each piece of equipment is narrowed to significantly reduce the site area.

The general structure of such a gas insulated switchgear will be explained with reference to the single line diagram in FIG. 1 and the layout diagrams in FIGS. 2 and 3.

That is, Fig. 1 shows a single-line connection diagram for one line of the multi-bus system, and the main buses BUS1 and BUS2 are
Disconnectors DS1 and DS2 are provided respectively, and these are connected to a line breaker CB, which is connected to a line grounding device ES and a cable connection CH via a line disconnector DS3. ing.

A conventionally known example of a general layout configuration in such a single line diagram is as shown in FIG. That is, the sheath disconnector 1 is arranged perpendicularly to the installation surface, and the sheath disconnector 1 is provided with an upper branch outlet part 2 and a lower branch outlet part 3 parallel to the installation surface. There is. on the other hand,
The main busbars 4 and 5 fixed on the installation surface are connected by a connection busbar 8 via disconnectors 6 and 7, respectively. and is connected to disconnector 1. The upper branch outlet part 2 of the cable disconnector 1 is connected to the cable connection part 11 via the disconnector 9 and the grounding device 10, but when installing the cable connection part 11, it is necessary to avoid the main busbars 4 and 5. For this purpose, the sheath disconnector 1 and the disconnector 9 are connected using a connection bus bar 12.

However, in the conventional gas insulated switchgear as shown in FIG. requires
The disadvantage was that the installation dimension _W1 of the equipment became very large. Furthermore, since two sets of connection busbars 8 and 12 must be used, the configuration is complicated, the assembly process is complicated, and the number of parts is large. Furthermore, since the connection buses 8 and 12 are arranged in two layers, the height of the equipment is high, and in order to maintain earthquake resistance, the equipment on the upper layer must be supported with a strong support frame. A large number of materials were required, and the installation work required a large amount of labor. Also,
When inspecting equipment, it was undesirable because upper management risked falling and other dangers.

In order to improve this and shorten the length of the connection buses 8, 12, an arrangement as shown in FIG. 3 has been proposed.

That is, in this conventional type, the energized conductor 23 led out from one end of the slit section 22 is branched into two parts within the container of the slit breaker 21, and the energized conductor 23 is divided into two branches.
3a and 23b are led out from branch outlet portions 24a and 24b provided on one side of the breaker container. Main busbars 25 and 26 are integrally attached to disconnectors 27 and 28, respectively, to the branch outlet portions 24a and 24b. On the other hand, sheath section 2
The current-carrying conductor 23c led out from the other end of 2 is
The cable is led out to a branch outlet 24c provided below the branch outlet parts 24a and 24b, and a cable connection part 30 is attached to this branch outlet 24c via a disconnector 24.

Although such conventional gas-insulated switchgear can reduce the installation area, it
All equipment must be placed on one side of the building, and the height _H1 of the equipment becomes extremely large, resulting in a significant drop in seismic performance and the need for larger supporting frames to prevent this. There were flaws.

[Object of the Invention] The present invention was proposed in order to overcome the drawbacks of the conventional gas-insulated switchgear as described above. It is an object of the present invention to provide a gas insulated switchgear that does not require a bus bar and has a support frame that is greatly reduced in width or miniaturized.

[Summary of the Invention] The gas insulated switchgear of the present invention divides the branch outlet of the current-carrying conductor provided in the vertically arranged insulation/disconnection container into two sides of the container, one on the main bus bar side and one on the cable connection side. By arranging it, it is possible to efficiently arrange the breaker, the main bus bar connected to it, the cable connection part, etc.

[Embodiment of the Invention] Next, an embodiment of the present invention will be specifically described based on FIG. 4.

In this embodiment, the shroud breaker 31 has a container whose axis is perpendicular to the installation surface, and has a shingle cut section 32 inside the container and a wire cutter 31 that is led out from both ends of the shrew cut section 32. Current-carrying conductors 33, 33c are provided. One current-carrying conductor 33 is connected to the breaker 31
It is divided into two parts inside the container. The branched current-carrying conductors 33a and 33b are arranged on the same side of the container of the shatter breaker 31 in a direction orthogonal to the container axis.
Moreover, it is led out from two upper and lower branch openings 34a and 34b which are provided at different positions along the axial direction of the container. These branch outlet parts 34a, 34b
are integrated with the disconnectors 37 and 38, and are connected to the main busbars 35 and 36 arranged on a plane parallel to the axis of the sheath disconnector 31 by a main busbar support frame 39. Further, the current-carrying conductor 33c led out from the other end of the shingle cut portion 32 is connected to the branch outlet portion 34a,
34b, it is led out from a branch outlet portion 34c provided on the opposite side of the container axis of the shredder breaker 31. This branch outlet portion 34c is connected to a cable connection portion 43 via a disconnector 40 and a grounding device 41, which are arranged in a direction orthogonal to the axis of the bow breaker container. This cable connection portion 43 is supported by a support pedestal 42 in parallel to the axis of the sheath disconnector container.

In the gas insulated switchgear of this embodiment having such a configuration, the branch outlet portions 34a, 34b, 34c provided in the shield breaker 31 are separately arranged on both sides of the container, so that the main busbars 35, 36 And the cable connection portion 43 can be efficiently arranged without using a connection busbar. Further, the disconnector 40 and the grounding device 41 are also supported by the branch outlet portion 34c and the cable connection portion support frame 42, making them highly stable.

Note that the present invention is not limited to the embodiment shown in FIG. 4, and an arrangement as shown in FIG. 5 is also possible.

That is, similar to the embodiment shown in FIG. 4, branch outlets 34a and 34b connected to the main busbars 35 and 36 are provided on the same side of the container of the shear breaker 31, and a branch outlet is provided on the upper side of the opposite side. A portion 34c is provided. Further, the cable connection part 43 is arranged so that the axis of the container is parallel to the axis of the container of the cutter 31, and is supported by the cable connection part support frame 42. Furthermore, the cable connection part 43
Above, a disconnector 40 and a grounding device 41 are disposed such that their container axes are coaxial with the container axis of the cable connection section 43, and are connected to the branch outlet 34c of the cable disconnector 31. has been done. The disconnector 40 and the grounding device 41 are supported by a cable connection support frame 42 in the same way as the cable connection 43.

In each of the above embodiments, the disconnector and the grounding device can be supported only by the cable connection support pedestal, the disconnector, or the cable connection support pedestal.
There is no need to provide a support frame for each device, and the number of support frames can be greatly reduced. In addition, by arranging the branch outlet provided on the shield disconnector separately on both sides of the shield disconnector container, the main bus bar and cable connection parts can be placed efficiently without taking up wasted space. There is no need for a connection bus bar between the devices, and the heights H ₂ , H ₃ and widths W ₂ , W ₃ of the entire device are greatly reduced.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a gas insulated switchgear that has a low overall height of the device, is excellent in earthquake resistance and workability during maintenance and inspection, and has a small installation area. effective.

[Brief explanation of the drawing]

Figure 1 is a single-line connection diagram for one line of a multi-bus system in a general substation, and Figures 2 and 3 are the arrangement configurations of conventional gas-insulated switchgear based on the single-line connection diagram shown in Figure 1. 4 are layout configuration diagrams showing one embodiment of the gas insulated switchgear of the present invention, and FIG. 5 is a layout configuration diagram showing another embodiment of the gas insulated switchgear of the present invention. BUS…Main bus, DS…Disconnector, CB…Shiya disconnector,
ES...Line grounding device, CH...Cable connection part, 1
...Shipping switch, 2, 3... Branch outlet, 4, 5... Main busbar, 6, 7... Disconnector, 8 Connection busbar, 9... Disconnector, 10... Grounding device, 11... Cable connection section, 1
2... Connection bus bar, 21... Edge disconnector, 22... Edge disconnection, 23a, 23b... Current-carrying conductor, 24a, 24
b, 24c... Branch outlet, 25, 26... Main bus bar, 27, 28... Disconnector, 29... Disconnector, 30...
Cable connection part, 31... Edge disconnector, 32... Edge disconnection part, 33, 33a, 33b, 33c... Current-carrying conductor,
34a, 34b, 34c... branch outlet portion, 35,
36... Main busbar, 37, 38... Disconnector, 39... Main busbar support frame, 40... Disconnector, 41... Earthing device, 4
2... Cable connection support frame, 43... Cable connection section.

Claims (1)

[Scope of Claims] 1. A scabbard section having a fixed side and a movable electrode is arranged coaxially with the container within a scabbard breaker container disposed perpendicularly to the installation surface. A current-carrying conductor led out from one end above or below is branched into two inside the container, and each of the branched current-carrying conductors is connected to two branch outlets provided above and below on the same side inside the container. Derived to the department,
These two current-carrying conductors led out are respectively connected to two main busbars provided above and below and integrated with a disconnector, while the current-carrying conductor led out from the other end of the sheath section is connected to the The cable is led out to the branch outlet provided on the side opposite to the two branch outlet parts, sandwiching the disconnector container, and this branch outlet part is connected to the cable connection part via the disconnector and the grounding device. A gas insulated switchgear characterized by: 2. A branch outlet for connecting the current-carrying conductor led out from one end of the bow break to the cable connection part is provided below the bow disconnector container, and a disconnector and grounding are connected to the branch outlet. The device according to claim 1, wherein the device is arranged perpendicularly to the axis of the breaker container, and the disconnector and the grounding device are supported by a cable connection support frame and the breaker. Gas insulated switchgear. 3. A branch outlet for connecting the current-carrying conductor led out from one end of the shield break to the cable connection part is provided above the shield disconnector container, and a disconnector and a grounding device are connected to the branch outlet. and the container axis of the cable connection part is arranged on the same axis and parallel to the axis of the disconnector container, and the disconnector and the grounding device are supported by the cable connection part support frame. Gas insulated switchgear according to item 1.