JPH0452043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas insulated switchgear, and more particularly, to a gas insulated switchgear that can be miniaturized and installed in a reduced installation area.

[Conventional technology]

Figure 1 shows the skeleton of a typical substation.

The other end of the sheath disconnector 4, which has one end connected to the main bus 1, is connected to a cable head 9 via a disconnector 7. A grounding switch 3,
5 and 8 are connected. Disconnector 4 and disconnector 7
An instrument transformer 6 is connected between the two.

An example of a conventional gas insulated switchgear constructed in accordance with this skeleton is shown in FIG.

The sheath disconnector 4 is arranged vertically, and both terminals connected to the sheath cut portion in the sheath disconnector 4 are led out from one side of the container. The upper terminal is connected to a disconnector 7 arranged in the connection busbar 10 and further connected to a cable head 9. An earthing switch 5 and a voltage transformer 6 are connected between the terminal and the disconnector 7, and an earthing switch 8 is connected between the disconnector 7 and the cable head 9. On the other hand, Shiya disconnector 4
The lower terminal of is connected to the main bus 1 via a connection bus and a disconnector 2, and an earthing switch 3 is connected between the bottom breaker 4 and the disconnector 2.

[Problem to be solved by the invention]

The above-mentioned conventional technology attempts to reduce the installation area by arranging each device constituting the gas-insulated switchgear three-dimensionally.
0 is connected to the cable head 9 with a length that exceeds the lower disconnector 2 and the main bus 1,
The cable is suspended on the opposite side of the main bus 1 or on the disconnection side. For this reason, the installation area as a whole is increasing. In addition, the instrument transformer 6 is connected to the bus bar 1.
Since the voltage transformer 6 is connected to the top of the voltage transformer 6, the height dimension is also increased due to the installation of the voltage transformer 6. As a result, it is also necessary to provide a support frame to prevent deterioration of seismic resistance, resulting in an increase in size.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas insulated switchgear that is small in size and has a small installation area by reducing the number of connection busbars and support frames between devices.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention accommodates a shingle section having a fixed side and a movable side contact in a vertically arranged sealed container, and connects an energized wire to one end of the lower end of the shingle section. A conductor is led out to a first opening provided on the lower side surface of the sealed container, and the current-carrying conductor connected to one end above the shingle section is connected to a first opening provided on the lower side of the sealed container. A current-carrying conductor led out to a second opening provided on the upper side surface and connected to the current-carrying conductor above the sheath section is connected to a third conductor provided on the side surface of the sealed container opposite to the second opening. a main busbar connected to the first opening via a disconnector, and a cable head connected to the second opening;
and an instrument transformer connected to and arranged in the third opening.

[Effect]

According to the present invention, the main bus bar is connected to the first opening on the lower side surface of the sealed container of the vertically arranged shingle breaker, and the main bus bar is connected to the first opening on the lower side surface of the sealed container of the vertically arranged
A cable head is connected to a second opening on the side opposite to the opening of the container, and an instrument transformer is connected to a third opening on the side opposite to the second opening of the sealed container. Since the devices are connected and arranged, there is no need for a connection bus bar, and the number of support frames can be reduced, making it possible to downsize the device and reduce the installation area.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows an embodiment of the gas insulated switchgear of the present invention. In this figure, each component is sealed with an insulating medium such as SF ₆ gas in a sealed container. The equipment conductors constituting the main circuit are supported by suitable insulators.

A sheath section 4 having a fixed side contact and a movable side contactor is housed in a sealed container 30 of a vertical sheath cutter. There is a cutout 4 on the lower side of the sealed container 30.
A first opening 31 is formed in order to lead out the current-carrying conductor connected to one terminal of the cutting section 4, and two second openings are formed in the upper part to lead out the current-carrying conductor connected to the other terminal of the cutting section 4. opening 32, third opening 3
3 is formed. The second opening 32 and the third
Although it is desirable that the openings 33 are formed on the same horizontal line so as to face each other, they may be opposed to each other with some deviation in the circumferential direction of the sealed container 30, or may be slightly shifted in the vertical direction. In any case, a pair of second
It is sufficient that the opening 32 and the third opening 33 are provided.

The three-phase integrated main bus 1 is connected to the first opening 31 via an insulating spacer 34 . A disconnector 2 is built in the sealed container of the main bus 1.

The sheath breakers 4 in the sealed container 30 are arranged for three phases, and one end is connected to the disconnector 2. The other terminal is a central conductor 35 provided in the axial direction of the sealed container 30.
It is connected to u, 35v, and 35w. Current transformer coils 36u, 36v, 36w are fixed surrounding these center conductors 35u, 35v, 35w. Current-carrying conductors 37u, 37v, 37w are arranged in parallel along the horizontal plane at the upper ends of the center conductors 35u, 35v, 35w.
7w has a portion in which all three phases are arranged on the same horizontal plane at least in a portion between the openings 32 and 33, that is, in the upper portion of the current transformer coils 36u, 36v, and 36w.

A potential transformer 6 is connected to the second opening 32 of the sealed container 30 via an insulating spacer 38, and an insulating spacer 39 is connected to the third opening 33.
A cable head 9 is connected via the cable.

The insulating spacers 38 and 39 are arranged so that their embedded conductors are at each vertex of the triangle, and the current-carrying conductor 3 is connected to the conductor 40 at the uppermost vertex.
7v has a bent portion near the insulating spacers 38 and 39 and is deviated upward from the above-mentioned horizontal plane.
Further explanation will be given with reference to FIG. 4, which shows the same part as a perspective view.

Center conductors 35u, 35 connected to the sheath section 4
v and 35w are arranged at each apex of a substantially triangular shape within the sealed container 30. Center conductor 35u, 35
Current-carrying conductors 37u, 37v, perpendicular to v, 35w,
37w are arranged parallel to the same horizontal plane at equal intervals. This horizontal plane is a plane passing approximately through the center line of the embedded conductors 41u and 41w of the insulating spacer 38. Therefore, the embedded conductor 41v and the current-carrying conductor 37v
Since the heights do not match, the current-carrying conductor 37v forms a bent part in the middle. Each current-carrying conductor 37u, 3
7v, 37w and embedded conductors 41u, 41v, 41
w and are connected at appropriate positions by contacts 42u, 42v, and 42w, respectively.

The current-carrying conductor 37v is the current transformer coil 36u, 36
v, 36w, other current-carrying conductors 37u, 3
It has a bent part so as to be on the same horizontal plane as 7w. As a result, current-carrying conductors 37u, 37v, 37w
An earthing switch 5 can be arranged on the horizontally juxtaposed portion of the ground switch. That is, according to this embodiment, the high voltage side stators 40u, 40v, 40w of the earthing switch 5
can be configured on the same horizontal plane, and similarly, the ground side movable element can also be configured on the same horizontal plane, and as a result, the axial length of the sealed container 30, that is, the overall height can be suppressed.

This earthing switch 5 will be further explained with reference to FIG. The current-carrying conductor 37v is level-converted by the bent portion to a horizontal plane that is substantially the same as the other current-carrying conductors 37u and 37w. Each current-carrying conductor 37u, 37v, 37w
High voltage side stator 40u, 40v, 40 respectively.
w is installed. In the illustrated embodiment, it can be noted that each high voltage side stator 40u, 40v, 40w is lower than the level of the buried conductor 43v. This is because if the high-voltage side stators 40u, 40v, and 40w are attached to the current-carrying conductors without converting the level of the current-carrying conductor 37v, at least the stators will be positioned above the embedded conductor 41v, and the axial length of the sealed container 30 will increase. Because it does.

Ground side movers 43u, 43v, 43w corresponding to high voltage side stators 40u, 40v, 40w are attached to a common plate 44 and connected to a lever 46 via a link 45. The rotating shaft 46a of the lever 46 passes through the sealed container 30 in an airtight manner and is rotated by an operation device (not shown). The rotation of the rotating shaft 46a results in a pendulum movement of the lever 46, and eventually the ground side movers 43u, 43v, 43w move up and down, opening and closing between them and the stators 40u, 40v, 40w. A guide rod 47 is coupled to the common plate 44, and this rod 47 is slidably fitted into a guide 48 to constitute a guide device.

According to the above-described embodiment of the present invention, the main busbar is connected to the first opening on the lower side surface of the sealed container of the shear breaker, and the side surface opposite to the first opening on the upper side of the sealed container. By arranging the cable head in the second opening and further connecting and arranging the potential transformer in the third opening above the first opening, the cable head and the potential transformer can be arranged vertically. It can be efficiently placed on the side of the disconnector. As a result, the installation area and height dimension can be significantly reduced. Moreover, the above-described configuration makes it possible to eliminate the need for connection busbars for connecting each device, and also to reduce the number of supporting frames, thereby achieving reduction in weight and size. Furthermore, the earthing switch can be installed in the upper space within the sealed container of the breaker without increasing its axial dimension.

〔Effect of the invention〕

As described above, according to the present invention, the height of the device can be reduced, the installation area can be reduced, and a light and small gas insulated switchgear can be provided.

[Brief explanation of the drawing]

Fig. 1 is a skeleton of a general switchgear, Fig. 2 is a front view of a conventional gas-insulated switchgear corresponding to Fig. 1, and Fig. 3 is a partial cross-section of an embodiment of the gas-insulated switchgear of the present invention. 4 is an enlarged perspective view of the main part of FIG. 3, and FIG. 5 is an enlarged sectional view of the main part of FIG. 3. 1... Main bus bar, 4... Sheath section, 5... Earthing switch, 6... Instrument transformer, 30... Sealed container,
31-33...opening, 35u, 35v, 35w
... Center conductor, 37u, 37v, 37w ... Current-carrying conductor, 38, 39 ... Insulating spacer.

Claims (1)

[Claims] 1. A fiber section having a fixed side and a movable side contact is housed in a vertically arranged sealed container, and a current-carrying conductor connected to one end of the lower part of the fiber section is placed inside the sealed container. A current-carrying conductor led out to a first opening provided on the lower side surface and connected to one end above the sheath section,
A current-carrying conductor led out to a second opening provided on the upper side surface of the sealed container opposite to the first opening and connected to the current-carrying conductor above the shingle section is connected to the second opening. and a third opening provided on the side of the sealed container opposite to the first
a main bus bar connected to the opening of the main bus via a disconnector; a cable head connected to the second opening; and an instrument transformer connected to the third opening. A gas insulated switchgear characterized by: 2 Inside the sealed container, three folds and three-phase current-carrying conductors connected to these are housed, and the second
The upper part of the current-carrying conductor led out to the opening and the third opening are arranged side by side along the horizontal plane, and the intermediate current-carrying conductor in the opening part is separated from the other current-carrying conductor. The gas insulated switchgear according to claim 1, characterized in that it is bent upward so as to be located at the apex of the triangle. 3. The gas-insulated switch according to claim 2, characterized in that a grounding switch is provided in the parallel portion along the horizontal plane of the current-carrying conductor led out to the second opening and the third opening. Device.