JPS60213205A - 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 The present invention relates to a gas insulated switchgear using an insulating gas such as SF6 gas.

[Technical background of the invention and its problems]

For substations and switchyards installed around major cities or coastal areas, the electrical equipment that makes up the substation or switchyard is sealed with an insulating medium such as SF6 gas due to the difficulty of obtaining land or to prevent salt damage. Gas-insulated switchgear is used. This type of gas-insulated switchgear is becoming increasingly high in magnetic pressure and capacity as the demand for electricity increases in urban areas, and further miniaturization, improved reliability, and simplified maintenance are required. requested. Therefore, circuit breakers, 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 configuration of such a gas insulated switchgear is shown in the single line diagram in Figure 1 and in Figure 2. This will be explained using the layout diagram in Figure J3.

Figure 1 shows a single-line connection diagram for one line in a multi-bus system. Disconnectors DSI and DS2 are arranged on the main buses BUS 1 and BUS 2, respectively, and they are connected to a breaker CB. CB is connected to a line grounding device ES, a voltage transformer PT, and a cable connection CH via a voltage transformer CT and a line disconnector DSJ.

As a general arrangement configuration example of such a single line diagram, the one shown in FIG. 2 is known. That is, the breaker 1 is installed perpendicularly to the installation surface, and the breaker 1
An upper outlet terminal 2 and a lower outlet terminal 3 are provided in parallel to the installation surface. On the other hand, main busbars 4 and 5, which are horizontally arranged and fixed on the installation surface, are connected to the lower outlet terminal 3 of the interrupter 1 via disconnectors 6 and 7, respectively. The upper outlet terminal 2 of the circuit breaker 1 is connected to a voltage transformer 12 and a cable connection part 13 via a voltage transformer 9, a new line switch 8, a grounding device 10, and a connection bus 1.

In the conventional gas-insulated switchgear as described above, when arranging the cable connection part 13, it is necessary to avoid the main busbars 4 and 5, so the axial length of the connection busbar I must be lengthened. The area tended to be large. In addition, since the overall structure is arranged in two layers (upper and lower), the height dimension Hl of the equipment becomes large, and in order to maintain earthquake resistance, the equipment on the upper layer must be supported with a strong support frame, and a large number of Materials were required, and the installation work required a lot of labor. Furthermore, when maintaining and inspecting the equipment, upper floors are at risk of falling, which is not desirable.

On the other hand, FIG. 3 shows another configuration example of the single line diagram of FIG. 1. The breaker 1, which is placed horizontally on the installation surface, is provided with lead terminals 2 and 3 at both ends in the axial direction of the container. The outlet terminal 2 is a current transformer 9 for measuring instruments, a disconnector 8, and a grounding device 1.

It is connected to the voltage transformer 12 and the cable connection part 13 via the connection bus 1. Further, main bus disconnect switches 6 and 7 are connected to the outlet terminal 3, and below the main bus disconnect switches 6 and 7, a main bus disconnect switch 6 and 7 is connected to the main bus disconnect switch 6 and 7.
, 5 are provided, each connected to a disconnector 6.7.

Even in a gas insulated switchgear with such a configuration, since other equipment is arranged on both sides of the circuit breaker 1, the length L1 of the entire configuration becomes large, which has the disadvantage that the installation space becomes even larger. Ta.

[Purpose of the invention]

The present invention has been made to eliminate the above-mentioned drawbacks, and provides a gas-insulated switchgear that is inexpensive and has excellent earthquake resistance by significantly reducing or downsizing the support frame and reducing the installation space. The purpose is to

[Summary of the invention]

In order to achieve such an object, the gas insulated switchgear of the present invention has an interruption section disposed inside the breaker container so that its operating axis is orthogonal to the breaker container axis. However, by configuring the energized conductor led out from the interrupted part to be led out from two or more outlet terminals arbitrarily provided on the side of the breaker's container or in the axial direction of the breaker, The main busbar, cable connections, etc. are arranged efficiently.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention in the single line diagram of FIG. 1 will be described in detail with reference to FIG. 4.

In this embodiment, the breaker 2 is arranged such that the axis of a container 22 filled with an insulating gas is horizontal to the installation surface, and a fixing device that is housed inside the container 22 and can be detached from the container 22 is installed. The breaker section 23 having side and movable side electrodes is arranged such that its operating axis is perpendicular to the axis of the breaker container 22, and current-carrying conductors 24.
25 has been derived. The operating device 2 of the breaker 23 is located at the extension in the operating direction of the breaker below the exterior of the breaker container 22.
6 is attached to the operating device 2.
6. Of the two current-carrying conductors 24 and 25 led out from the interrupter 23, the current-carrying conductor 24 leading out from the operating device 26 side is placed inside the breaker container 22 with its central axis parallel to the axis of the breaker container 22. The current is led out from an outlet terminal portion 28 provided at the axial end of the breaker container 22 via an instrument current transformer 27 arranged so as to be . A current-carrying conductor 2 led out from this lead terminal portion 28
4 connects this disconnector 3 via a disconnector 31 and a grounding device 32.
and a grounding device 32 are connected to a cable connection section 33 which is housed in the same container. Further, an instrument transformer 34 is disposed in the cable connection portion 33 in the axial direction of the container. The other current-carrying conductor 25 led out from the interrupter 23 is branched into two inside the interrupter container 22. These branched current-carrying conductors 25a, 25b
are led out from two outlet terminal portions 29 and 30 provided above the breaker container 22 and shifted from each other by 70 in the axial direction of the container 22. This outlet terminal part 29.30 is integrated with disconnectors 3fi, 3&,
Main busbars 35 and 36 arranged on a plane parallel to the axis of the breaker container 22 are connected to each other.

Incidentally, an insulating spacer capable of gas partitioning is arranged in each of the sunrise terminal portions 2B, 29.30, and thereby the breaker container 22, the container of the cable connection portion 33, and the main bus bar 35.
36 is divided into gas compartments.

In the gas insulated switchgear of this embodiment having such a configuration, the main busbar 35° 36 and the cable connection portion 33 are connected to the interrupter 21 via the outlet terminal portions 2B, 29.30, and the cable connection By directly connecting the instrument transformer 34 to the section 33 and housing the instrument current transformer 22 inside the breaker container 22, efficient arrangement can be achieved without using a connecting busbar. In addition, the main busbars 35 and 36 are supported by the circuit breaker 21, and the cable connection section 33 and the voltage transformer 34 can be supported by the circuit breaker 2, which eliminates the need for a support frame for each and improves stability. It has become very expensive.

It should be noted that the present invention is not limited to the embodiment shown in FIG. 4, and configurations as shown in FIGS. 5 and 6 can be adopted.

FIG. 5 shows an embodiment using an interrupter having the same configuration as that in FIG. Two lead terminal portions 29 and 30 are provided facing downward on the same lower surface along the . A current-carrying conductor is disposed from this outlet terminal portion 29, 30 so that its operating axis is perpendicular to the axis of the breaker container 22, is led out from one end of the interrupted portion 23, and is branched into two inside the breaker container 22. 25h, 25b
are derived respectively. In addition, this lead terminal part 2
At 9.30, the main busbar 3 integrated with the disconnector 37.38
5°36 are connected and placed on the mounting surface.

The interrupter 2 will therefore be placed on the main busbar 35,36. Above the interrupter container 22 and extending in the operating axis direction of the interrupter 23, an operating device 26 for operating the interrupter is provided. The current-carrying conductor 24 led out from the operating device 26 side of the breaker 23 connects an instrument current transformer 27 arranged inside the breaker container 22 so that its central axis is parallel to the axis of the breaker container 22. It is led out from an outlet terminal 28 provided at the axial end of the No. 81 shutoff container 22 through the opening. This outlet terminal portion 28 includes a disconnector 31 housed in the same container and electrically connected to it, a grounding device 32, a cable connecting portion 33, and a 31 connector provided on this container, as in the embodiment shown in FIG. A transformer 34 is connected.

Even in an 11-section gas insulated switchgear as shown in Figure 5,
Similar to the actual example in Fig. 4, each device can be efficiently arranged without using connection busbars, and in this actual example, the breaker 21, cable connection section 33, and voltage transformer 34 are the main components. Since it is supported by the busbar 35°36, the fourth
As with the illustrated embodiment, a support frame is almost entirely unnecessary.

Figure 6 shows the return mother i,,Ii! The structure is suitable for the type of gas insulated switchgear for busbar communication, and the breaker 521 is placed on the installation surface with the axis of the container 22 horizontal. A breaker 23 is disposed inside the breaker container 22 so that its operating axis is perpendicular to the axis of the breaker container 22, and an operating device 2 for operating the breaker 23 is provided below the breaker container 22.
6 is placed. Among the current-carrying conductors led out from both ends of the breaker part, the current-carrying conductor 24 leading from the operating device 26 side is arranged parallel to the axis inside the breaker container 22, and then the central axis is placed inside the breaker container 22 in the breaker part 23. The current is led out from an outlet terminal portion 29 provided above the breaker container 22 via an instrument current transformer 27 arranged parallel to the operating axis of the circuit breaker. The other current-carrying conductor 25 led out from the interrupted portion 23 is led out from an outlet terminal portion 30 provided on the same side as the outlet terminal portion 29 of the breaker container 22 and at a position shifted in the axial direction. This output terminal part 29
, 30 is integrated with a disconnector 37, 38, and the container axis is arranged on a plane parallel to the axis of the breaker container 22.
The main busbars 35 and 36, which are tilted by 1°, are connected.

In such a gas insulated switchgear with 11 components (i-), the instrument phase change vIe device 27 is placed inside the breaker container 22, so there is no connection bus bar, the configuration can be made with a minimum number of devices, and the installation space is reduced. will be significantly reduced.

In each of the above embodiments, t-1 [
;) Since the breaker housed inside the chamber of K was arranged so that its operation 4N11 was perpendicular to the axis of the breaker container, the breaker part, J1. Conductor arrangement and instrumentation '01L
Specialized equipment can be easily stored inside the breaker container, and equipment such as the main bus bar and cable connections connected to the breaker can be efficiently arranged, eliminating the need for connection bus bars.
Sieve dimensions H2, I (J and length dimensions L2, L) of the entire device
3 is reduced. Additionally, the entire configuration can be supported by the equipment that is constructed, making the support cradle almost uncomfortable.

〔Effect of the invention〕

As described above, according to the present invention, the height of the entire device is low, it has excellent earthquake resistance and workability during maintenance and inspection, and it can be installed at 1 m.
A gas insulated switchgear with a small ram can be provided.

[Brief explanation of drawings]

Figure 1 is a single-line wiring diagram for one circuit at a substation, Figures 2 and 3 are layout configuration diagrams of conventional gas-insulated switchgear in the single-line wiring diagram shown in Figure 1, and Figure 4 is a diagram of a conventional gas-insulated switchgear. FIGS. 5 and 6 are layout diagrams showing one embodiment of the gas insulated switchgear of the invention, and FIGS. 5 and 6 are layout diagrams showing other embodiments of the invention, respectively. 2)...Shiya @ vessel, 22... breaker container, 23.
... Breaking part, 24.25 ... Current-carrying conductor, 26 ...
Operating device, 27... Instrument current transformer, 2B, 29.30
... Output terminal section, 31 ... Disconnector, 32 ... Earthing device, 33 ... Cable connection section, 34 ... Instrument transformer, 35.36 ... Main bus bar, 37.38 ...Disconnector.

Claims (5)

[Claims] (1) A breaker part, which is housed inside a container filled with an insulating gas and has fixed and movable electrodes that can be moved toward and away from each other, is arranged so that its operating axis is perpendicular to the axis of the container; At least one of the current-carrying conductors leading out from both ends of the container is arranged parallel to the container axis inside the container, and at least one of these current-carrying conductors is connected to two or more lead-out terminals provided on the side surface of the container. The circuit breaker is configured to be connected to other equipment, and one conductor is formed to be led out from the lead terminal portion via a current transformer. The main bus bar connected to the outlet terminal provided on the side surface of the breaker container is arranged so as to be parallel to the installation surface, and the container axis of the main bus bar is on a plane parallel to the container axis of the breaker container. A gas insulated switchgear characterized by being arranged so as to be orthogonal to each other. (2) One of the current-carrying conductors led out from both ends of the breaker container is branched into two inside the breaker container, and this current-carrying conductor is led out from two outlet terminals provided on the side of the breaker container. A gas insulated switchgear according to claim 1. □ (3) A breaker is arranged on an installation surface, and a main bus bar connected to an outlet terminal provided on a side surface of the breaker container is arranged above the breaker, and this main bus bar is connected to the breaker A gas insulated switchgear according to claim 1, which is supported by a gas insulated switchgear according to claim 1. (4) A patent in which the main bus bar connected to the outlet terminal provided on the side surface of the breaker container is arranged on the lower installation surface of the breaker, and the breaker is supported by the main bus bar. A gas insulated switchgear according to claim 1. (5) The external drawer container housing the disconnector and the grounding device is arranged in the axial direction of the breaker container so as to be orthogonal to the breaker axis. Device.