JPH0564003B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides an improved gas-insulated switchgear for a busbar connecting line, in which a current-carrying conductor is disposed in a container housing a beam cut-out section, and a current-carrying conductor is arranged parallel to the axial direction of the container. Regarding.

[Technical background of the invention and its problems] In recent years, with the increase in demand for electricity in urban areas, gas-insulated switchgears have been widely used to allow installation in narrow spaces near cities and to harmonize with the surrounding environment. I started to be able to do it.

In addition, gas insulated switchgears are becoming increasingly high-voltage and large-capacity, and are required to be further downsized, improved in reliability, and simplified in maintenance.

Figure 4 shows a single-line connection diagram for one line in a general double-bus system, with a CB bridge and disconnector, and one pole side is connected to the cable via a line disconnector DS3 and a line grounding device ES. Connected to part CH. CT
1 is a current transformer.

In addition, the other pole side of the breaker CB is a disconnector DS1 for the main bus BUS1 and a disconnector DS2 for the main bus BUS2.
are connected to the main bus lines BUS1 and BUS2, respectively.

Conventionally, as a typical example of the equipment arrangement configuration in such a single line diagram, the configuration shown in FIG. 5, as shown in US Pat. No. 4,241,379, is known.

In other words, the breaker CB has a container 30 filled with insulating gas arranged horizontally to the installation surface.
and each phase and cut section 3 stored inside the container 30.
2 and each phase conductor 33a, 33b led out from both ends of the shingle section 32, respectively. A current-carrying conductor 33a led out from one end of the sheath section 32 is arranged inside the container 30 in parallel with the sheath section 32, and is arranged along the axis of the container 30.
It is branched into two inside the container 30 from the two branch outlet portions 31a and 31b, and each is led out above the container 30. That is, one current-carrying conductor 33a1 of the current-carrying conductors 33a is led out from the branch outlet portion 31a orthogonal to the axis of the container 30. Further, the other current-carrying conductor 33a2 is parallel to the axis from the middle of the current-carrying conductor 33a1 and then orthogonal to the branch outlet portion 3.
1b.

On the other hand, the current-carrying conductor 33b led out from the other side of the sheath section 32 is branched into two after passing through the current transformer 20 of each phase corresponding to CT1 in FIG. Provided branch outlet portion 31c
The other end is led out to a branch outlet 31d provided perpendicularly to the axial direction of the container 30. The branch outlet 31d has a voltage transformer 40, and the conductor led out from the branch outlet 31c has a grounding device 41 (ES in FIG. 4), a disconnector 42 (DS3), and a cable head 43 (CH).
is connected. Further, the branch outlet portion 31
Two main bus lines BUS1 and BUS2 arranged perpendicularly to the axial direction of the container 30 are connected to a and 31b via disconnectors 45 (DS1 and DS2).

In this way, Figures 4 and 5 show examples of the configuration of substation line circuits, but in actual substations, bus line communication lines are used to connect and disconnect main buses. Gas insulated switchgear may be required.

FIG. 6 shows an example of a single line diagram of such a busbar connection line.

However, if gas-insulated switchgears for line circuits and busbar connection circuits used in substations are designed and manufactured as completely separate devices, it is not desirable from an economic point of view; It is desirable that the components be shared and interchangeable between the two with the minimum necessary changes.

[Purpose of the Invention] Therefore, the present invention has been made to satisfy the above-mentioned needs, and when used for line circuits in a container in which a sheath section, a current transformer, and a current-carrying conductor are arranged. It is an object of the present invention to provide a gas-insulated switchgear for a busbar connection line that can be applied to a busbar connection line without major configuration changes.

[Summary of the Invention] In order to achieve the above object, according to the present invention, a current transformer is housed in a bow-shaped container, and this container is provided with three lead-out terminal portions in a direction orthogonal to the axis of the container. A main bus bar is connected to two adjacent lead terminal parts of the lead terminal parts, and a first wire is connected to one of the main bus bars, and a first wire is connected to one of the lead terminal parts.
A current-carrying conductor is connected to the other main bus bar, which is drawn out from the other side of the bow section, passes through the current transformer arranged in the axial direction of the bow section, and then is inserted into the container. A second current-carrying conductor arranged substantially parallel to the cut portion is connected, and the intermediate portion of the second current-carrying conductor is supported by a supporting insulator attached to an unconnected lead terminal portion of the main bus bar. . With this configuration, by connecting another main bus to the lead-out terminal section with the support insulator attached, and by changing the first and second current-carrying conductors, it can be used as a gas-insulated switchgear for line circuits. can be applied.

[Embodiment of the Invention] An embodiment of the gas insulated switchgear according to the present invention will be specifically described below with reference to FIGS. 1 and 2.

In FIG. 1, a container 1 of the insulating gas is arranged vertically.
Inside, a sheath section 2 is arranged in the axial direction of the container 1, and current-carrying conductors 3 and 4 are led out from above and below, respectively. A current transformer 5 is arranged. In addition, the container 1 of the shear breaker is provided with three outlet terminal portions 1a to 1c in a direction perpendicular to the axis of the container 1, which are arranged vertically in a row in the horizontal direction, and an outlet at the top. The upper end of the current transformer 5 is positioned within the upper and lower range of the terminal portion 1a.

Inside the container 1 of the shroud breaker, first, the current-carrying conductor 4 is drawn out from below the shroud breaker 2.
is bent in the horizontal direction at a position immediately adjacent to the sheath section 2, continues straight in the horizontal direction, and is pulled out from the lower outlet terminal 1c. In addition, the current-carrying conductor 3 pulled out from above the sheath section 2 is bent in the horizontal direction at a position immediately adjacent to the upper end of the current transformer 5, and then once bent downward to form a U-shape. It is again bent horizontally and pulled out from the lead terminal portion 1b.

In addition, the structure of the current-carrying conductor 3 placed on the upper part of the container 1 of the breaker is as shown in FIG.
It is divided at a portion parallel to the axis of the container between the bottom cut portions 2 and in the vicinity of the outlet terminal portion 1b,
It constitutes a divided conductor 3a, and further includes a shingle section 2.
At the end of the divided part on the side and the output terminal part 1b side,
A contact 14 is provided respectively, and finger portions 15 that engage with each contact 14 are provided at both ends of the divided conductor 3a.
By providing this divided conductor 3a
is detachable in the vertical direction. Moreover, the horizontally arranged portion of this divided conductor 3a is
The lid 7 of the container 1 is attached via the post-shaped insulating spacer 6.
is installed on. Further, at a position facing the outlet terminal portion 1a, which is the middle portion of the divided conductor 3a, it is supported by a metal fitting 9a fixed to a post-shaped insulating spacer 9 attached to a lid 8 that closes the opening of the outlet terminal portion 1a.

Returning to FIG. 1, the current-carrying conductors 3 and 4 led out from the lead terminal parts 1b and 1c are connected to the lead terminal part 1.
They are connected to fixed side electrodes of disconnectors 12 and 13 integrated with main busbars 10 and 11 attached to terminals b and 1c, respectively. Note that the container ends of the disconnectors 12 and 13 are closed, and the movable side electrodes of the disconnectors 12 and 13 are connected to the main busbars 10 and 11, respectively.
With the above configuration, a busbar communication gas insulated switchgear having an electrical path of the main busbar 11, the disconnector 13, the current-carrying conductor 4, the shingle section 2, the current-carrying conductor 3, the disconnector 12, and the main busbar 10 is formed.

According to the above configuration, the divided conductors 3a of the current-carrying conductor 3 are arranged so that their current-carrying directions are opposite to each other within a relatively close distance within the container 2, so that the current-carrying conductor 3 is Considering the case where a current of several tens of thousands of A flows through the conductor 3 for a short time, a large repulsive force acts on the current-carrying conductor 3 due to electromagnetic force. Since the current-carrying conductor 3 is supported and fixed at 9 in a direction perpendicular to the axis of the container 2, it is possible to prevent the current-carrying conductor 3 from excessively vibrating or deforming. Furthermore, since the post-shaped insulating spacer can be attached using the lid 8 that closes the output terminal portion 1a, the installation is easy and the configuration can be simplified since no special installation space is required.

On the other hand, the gas insulated switchgear for busbar communication can be easily applied to a gas insulated switchgear for line circuits without significantly changing its overall configuration. That is, as shown in FIG. 3, the gas insulated switchgear for line circuits shown in FIG. 4 is configured by making maximum use of the constituent members of the gas insulated switchgear for busbar communication of the present invention shown in FIG. becomes possible. Here, with reference to FIG. 3, a description will be given of a gas insulated device for line circuits which is applied by modifying the gas insulated switchgear for busbar communication shown in FIG. 1. The same parts as in FIG. 1 are given the same reference numerals, but in this configuration, the lid 8 that closes the outlet terminal portion 1a is removed, and a disconnector 17 integrated with the main bus bar 16 is attached thereto. On the other hand, the current-carrying conductors 3 and 4 in the container 1 shown in FIG. 1 are changed to current-carrying conductors 18 and 19 as shown in FIG.
Connect to 10 and 11. That is, the current-carrying conductor 18 is connected between the upper outlet of the sheath break 2 and the main bus bar 16 via the outlet terminal 1a. Further, one end of the current-carrying conductor 19 is connected to the lower outlet of the sheath break 2, and the other side is branched within the container 1, and one branch current-carrying conductor 19a is connected to the main bus bar 10 from the lead terminal 1b. The other branch current-carrying conductor 19b is connected to the main bus bar 11 from the lead terminal portion 1c.

The movable side electrode of the disconnector 17 connected to the first lead terminal portion 1a is connected to the main bus bar 16, the cable head 18, and other insulated lead-out portions.

In this way, the gas insulated switchgear for the line circuit shown in FIG. Very economical.

[Effects of the Invention] As explained above, according to the present invention, in a structure in which a sheath section, a current transformer, and a current-carrying conductor are arranged in a container, the current-carrying conductor is It is possible to provide a gas insulated switchgear for connecting busbars that does not cause excessive vibration, and this gas insulated switchgear can be used for line circuits without changing the shape of the shield section or the container that houses the current transformer. Since it can be applied to gas-insulated switchgear, it is possible to standardize the components of the device, and it is possible to construct an economical device.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the gas insulated switchgear for busbar communication of the present invention, Fig. 2 is an enlarged view of the main part of Fig. 1, and Fig. 3 is a line to which the device of the present invention has been modified and applied. FIG. 4 is a single-line connection diagram of a line circuit, FIG. 5 is a configuration diagram of a conventional device, and FIG. 6 is a single-line connection diagram showing a busbar communication line. DESCRIPTION OF SYMBOLS 1... Container, 1a, 1b, 1c... Output terminal part, 2... Sheath section, 3... Current-carrying conductor, 3a...
Split conductor, 4... Current-carrying conductor, 5... Current transformer, 6...
...Post type insulating spacer, 7, 8... Lid, 9...
Post type insulating spacer, 10, 11...main bus bar,
12, 13...Disconnector.

Claims (1)

[Claims] 1. A sheath section is housed in the axial direction of the container in a container filled with an insulating medium, and first and second current-carrying conductors led out from both ends of the sheath section are externally connected. A current transformer is arranged coaxially with the sheath section around the lead-out and the first current-carrying conductor, and three lead-out terminal sections are provided in the container in the same direction and perpendicular to the axis thereof. A main bus bar is connected and arranged to the first and second two adjacent lead terminal parts of the lead terminal parts, and the first of the two adjacent first and second lead terminal parts is connected to the main bus bar. The lead-out terminal part is arranged on the end side from which the second current-carrying conductor is led out of the sheath or break, and the second current-carrying conductor connects one pole of the break and the first lead-out on the end side. A first current-carrying conductor that connects the main busbars connected to the terminal part and led out from the other end of the disconnected part is bent in the container in a direction perpendicular to the axis of the container and then connected to the third lead-out terminal. The first current-carrying conductor extends approximately parallel to the axis of the container, and then connects to the second main bus bar through the second lead terminal, and the first current-carrying conductor extends approximately parallel to the axis of the container. A gas insulated switchgear for busbar communication, characterized in that the third outlet terminal portion is supported in the parallel portion via an insulating support attached to a lid that closes it. 2. Each of the main busbars is formed integrally with a disconnector, and the first and second current-carrying conductors are connected to the respective mainbusbars via the disconnector. Gas insulated switchgear for busbar connection. 3. The gas-insulated switchgear for busbar communication according to claim 1, wherein the first current-carrying conductor is formed as a divided conductor that can be attached to and detached from the conductor on the bow break portion and the main busbar side.