JPS60261311A - 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 three-phase circuit breaker constructed by arranging a current-carrying conductor parallel to the container axis in a breaker container using an insulating gas such as Sr6 gas. This invention relates to a conversational gas insulated switchgear.

[Technical background of the invention and its problems]

Substations and switchyards installed around major cities or coastal areas may be difficult to obtain due to land availability or salt damage countermeasures.
Gas-insulated switchgear is used in which electrical equipment constituting a substation or switchyard is sealed with an insulating medium such as SF or 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, a three-phase, coil-type gas-insulated switchgear in which three-phase current-carrying conductors are housed in one container has come to be employed.

Generally, in a three-phase finger-type gas insulated switchgear, it is necessary to change the phase arrangement of current-carrying conductors inside the container in order to match the phase order between the main busbars and between the main busbar and external lead-out parts such as cable connections. It's coming.

The general structure of such a three-phase finger-type gas insulated switchgear will be explained with reference to the single line diagram in FIG. 3 and the sectional view in FIG. 4.

Figure 8 shows a single-line connection diagram for the line in a multi-bus system.The main buses BUSI and BUS2 each have new circuit
I, DS2 are arranged, and this disconnector DSI.

DS2 is connected to breaker CB, this house□
The instrument CB is connected to the instrument current transformer CT; the line grounding device BS, the instrument current transformer FT, and the cable connection section CH via the line disconnector D83.

As a conventional three-phase finger-shaped gas insulated switchgear using such a single line diagram, a configuration as shown in FIG. 4 is known. That is, the breaker 1 is arranged perpendicularly to the installation surface, and the breaker 1 is provided with an upper outlet terminal 2 and a lower outlet terminal 8 parallel to the installation surface. A 1-shaped connection busbar 4 is connected to the lower outlet terminal 3, and main busbars 5 and 6, which are integrated with a disconnector, are provided below the connection busbar 4. connected. Upper outlet terminal 2 of breaker 1
is an instrument current transformer7. Shinroki 8. Potential transformer 11 and cable connection 12 via earthing device 9 and connection busbar 10
It is connected to the.

In this Figure 4, the phase order of each phase conductor a, b, c is shown by a broken line, but the phase order of the lead-out conductors of the upper lead terminal 2 and lower lead terminal 8 portion is different at the top and bottom. . In a three-phase finger-shaped gas insulated switchgear with such a configuration, the main bus 5,
6 is connected to the connection busbar 4, it becomes necessary to twist the internal current-carrying conductor at the connection busbar 4 that connects the main busbar 5.6 from the breaker 1, which complicates the structure and increases costs. It can also be a cause. Furthermore, because the phase arrangement of the main buses 5, 6 and the connection bus 4 is different, the phase order confirmation work during and after assembly becomes complicated, and this makes it difficult to confirm the phase order during and after assembly. There are problems such as it takes a lot of time.

In addition, the phase arrangement of devices connected to other ports 2 of the breaker 1'' may be a problem due to the configuration of the disconnector 8 and the grounding device 9, for example, the disconnector 8. Since the operating mechanism cannot be accommodated unless the grounding device 9 is installed laterally, the phase arrangement must be different from the phase arrangement of the connection bus bar 4. When looking at the entire gas-insulated switchgear, the phase arrangement and phase order are very different. This increases the complexity, and as mentioned above, there are problems in that it reduces assembly workability, complicates the structure, and even leads to assembly defects.

[Purpose of the invention]

The present invention has been proposed to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a three-phase finger-shaped gas insulated switchgear which is simple in structure by eliminating complicated current-carrying conductors, is easy to assemble, is inexpensive, and has high reliability.

[Summary of the invention]

In order to achieve the above object, according to the present invention, the current-carrying conductor led out from one pole side of each phase breaker inside the breaker is branched into two, and together with the current-carrying conductor on the other pole side, there are eight lead terminals. In a three-phase finger-type gas insulated switchgear using a circuit breaker having a structure, the eight outlet terminals are arranged on the same side of the container, and the eight outlet terminals are led from each outlet terminal.

By making the phase arrangement of the current-carrying conductors that come out the same, it is possible to eliminate complicated connection busbars, and since the phase arrangement of each device connected to this breaker is the same, it prevents work errors during assembly. This also makes it easier to confirm the phase order after assembly.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention in the single line diagram of FIG. 8 will be explained in detail based on FIGS. 1 and 2. In this embodiment, the breaker CB is a container filled with an insulating gas. The axis of 21 is arranged perpendicular to the installation surface. Inside the breaker container 21, the breaker parts 23 of each phase having fixed side and movable side electrodes that can be brought into and out of contact with each other are arranged so that their operating axes are parallel to the axis of the breaker container 21. ing. The current-carrying conductor portion of each phase led out from the lower terminal of the breaker leg branches upward inside the breaker container 21, and then connects to a first lead terminal provided at the lower side of the breaker container 21. 27
It is derived from The current-carrying conductor portions branched above the current-carrying conductor portions of each phase are arranged parallel to the axis of the breaker container 21 for each phase, and are provided above the first outlet terminal 27 on the side surface of the breaker container 21. It is led out from the second sunrise terminal path. This first. Main bus bars 30, 31 integrated with a disconnector are connected to the second lead terminals 27, 28, respectively. The current-carrying conductors 26 of each phase led out from the terminals above the breaker n are installed above the breaker in the breaker container 21 for each phase. , 432 months, a, 5, yu, 8 yu, 2□,.

The second output terminal on the surface 1'[ is led out from the eighth output terminal 29 provided above that side.

A disconnector 40 is connected to the output terminal 29. A grounding device 41 is connected, as well as a cable connection 42 and an instrument transformer 43.

Here, the broken lines in FIGS. 1 and 2 indicate a of each phase conductor.

b, c are described for convenience to show the order of the phases, and the internal conductor arrangement of the equipment connected to each of the eight sunrise parts 27, 28, and 29 is the same (a, b, c from the top in the diagram). The inner conductor phase arrangement of the cable connection part '42 is also the same as that of the outlet side.

In this way, by making all the exit directions from the breaker container 21 the same and making the internal conductor phase arrangement of the devices connected to it the same, the phase order becomes extremely simple and clear, and the phase order shown in FIG. There is no need for a complicated pair of twisting frames within the connection bus bar 4 as in the conventional embodiments, simplifying the structure and allowing two assemblies.

It is possible to significantly improve disassembly workability, etc., and it becomes possible to reduce the cost of gas-insulated switchgear.

Further, since the connection bus bar for connection to the main bus bar 30, 31 is made by the current-carrying conductor 25 placed inside the breaker container 21 in parallel with the axis of this container 21, there is no connection bus bar 4 outside the breaker container 21. Because of the efficient layout, the installation volume of the gas insulated switchgear can be greatly reduced, making it possible to provide an extremely superior gas insulated switchgear that meets the trend of rising land prices in recent years.

This document = By making the gas insulated switchgear have the same phase arrangement when viewed from the side or from the plane, the phase arrangement can be further simplified. The ease of disassembly and assembly can be improved.

〔Effect of the invention〕

As shown above, according to the present invention, all eight outlets provided in the breaker container are in the same direction, and the internal conductor phase arrangement of the devices connected to these outlets is the same. Therefore, it is possible to provide an excellent three-phase finger-shaped gas insulated switchgear which has a very simple and clear phase sequence, a simple internal structure, good disassembly and assembly workability, and a small installation volume.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a single line diagram to which the present invention is applied, and FIG. 4 is a conventional FIG. 1 is a configuration diagram showing this type of device. CB...breaker 21...breaker container phantom...
Breaking part 24.25.26... Current-carrying conductor 27.28
．． 29... Output terminal 30.31... Main bus bar 40
...Disconnector 41...Grounding device 42...Cable connection agent Patent attorney Kensuke Chika (and 1 other person) Fig. 1 Fig. 2 042 Fig. 3

Claims (2)

[Claims] (1) Each phase breaker having a fixed side and a movable side electrode that can be moved toward and away from each other is housed in a breaker container filled with insulating gas, and each phase breaker led out from one end of each phase breaker The phase current-carrying conductors are arranged in parallel to the container axis within the container, and each phase current-carrying conductor is divided into two (first and second lead-out terminal portions that are branched into two and provided on the side surface of the container, or The main busbars are connected to the first and second lead-out terminals via new circuits, respectively, and the current-carrying conductors of each phase led out from the other ends of the phase cut-off parts are A three-phase terminal is led out from a third outlet terminal provided on the side of the container, and an external outlet terminal such as a cable connection part is connected to this eighth outlet terminal via a disconnector, a grounding device, etc. In the circular gas insulated switchgear, the first, second, and eighth outlet terminal portions are arranged on the same side of the container, and in the cross section of each of the outlet terminal portions parallel to the container axis, the respective outlet terminal portions are arranged on the same side of the container. A three-phase, circular gas-insulated switchgear characterized in that the phase arrangement of current-carrying conductors of each phase led out from a terminal portion is the same phase arrangement. (2) A three-phase speaker type according to claim 1, in which the breaker, and the current-carrying conductor and the cable connection part arranged in the axial direction of the breaker in the same container as the breaker have the same phase arrangement direction. Gas insulated switchgear.