JPS60187213A - 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] [Field of application of the invention] The present invention relates to a gas insulated switchgear.

[Background of the invention]

FIG. 1 shows a typical skeleton of a gas-insulated switchgear with an instrument transformer. The other end of the breaker 4, which has one end connected to the main bus bar 1, is connected to a cable head 9 via a disconnector 7.

Both ends of the disconnector 4 and the cable head 9ψ of the disconnector 7
Earthing switches 3, 5 and 8 are connected to the
A voltage transformer 6 is connected between the circuit breaker 4 and the circuit breaker 7 .

An example of a conventional gas insulated switch constructed in accordance with this skeleton is shown in FIG. As shown in the figure, the three-phase breaker 4a of the three-phase breaker 4 is arranged vertically, and both terminals are led out from one side of the close-pierced container 30. The upper terminal of these terminals is connected to a disconnector 7 constructed within the conductor tube 10, and further connected to, for example, a cable pend 9 of a pull-out terminal device 9a. Between this upper terminal and the disconnector 7, a grounding switch 5 and a voltage transformer 6 are connected.
is connected to the disconnector 7 and the cable head 9.
A grounding switch 8 is connected between the two. On the other hand, the lower terminal of the breaker 4 is connected to the main bus 1 via the new circuit switch 2, and the earthing switch 3 is connected between the breaker 4 and the disconnector 2.

In the gas insulated switchgear configured in this way, as is clear from the figure, the upper conductor pipe 10 is connected to the lower disconnector 2.
and birth mother &! The cable has a length exceeding 1 and is connected to the cable head 9, and the cable is suspended on the side opposite to the breaker of the main bus bar 1. For this reason, the conductor tube 10 is not long, and the area it occupies as a whole becomes large.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a gas insulated switchgear that can be downsized.

[Key points of invention]

That is, the present invention is a vertical three-phase circuit breaker in which a three-phase circuit breaker is housed in a cylindrical sealed container, one terminal of which is connected to the metal main bus bar, and the other terminal is drawn out through the connection conductor of each phase. In a gas insulated switchgear connected to a terminal device, space portions are provided on the opposite side and side portions of the terminal container of the draw-out terminal device, respectively, and a new circuit device is placed in either one of the space portions, and a new circuit device is placed in the other side. The device is characterized in that a grounding switch is disposed in the terminal case, so that the disconnecting switch and the grounding switch are arranged in the space provided on the side opposite to the bushing and on the side of the terminal container. Ru.

[Embodiments of the invention]

The actual sister example shown in the drawings (1ζ based on the tree) will be explained below. Fig. 3 and Fig. 4 show an embodiment of the present invention. Note that the same parts as in 4i'l Since the same reference numerals are given, the explanation will be omitted.In this example, the drawer terminal device 9
An empty +mJ section is provided on the side opposite to the bushing 10a and the side part of the terminal container 41 of a, a grounding switch 8 is provided in the space between the bushings 10a, and a disconnector 7 is provided between the beams in the side part. Ta. By doing this, the earthing switch 8 and the disconnecting switch 7 are connected to the opposite bushing l Q a side of the terminal container 41.
It is possible to obtain a gas insulated switchgear that can be downsized by being disposed in a space provided in both sides.

That is, the sealed container 30 of the vertical breaker 4 has a branch part 31 formed at the lower part for leading out one terminal of the breaker 4, and two branch parts 31 at the upper part for leading out the other terminal of the breaker 4. Branch portions 32 and 33 are respectively formed in the radial direction. Although it is desirable that the dividing portions 32 and 33 be formed on the same horizontal line so as to face each other, they may be slightly offset in the circumferential direction of the sealed container 30. Note that the branch part 32 is the branch part 3
It is desirable to form it above 1. In any case, a pair of branch portions 3 formed in the radial direction near the upper end of the sealed container 30
2.33.

A three-phase integrated bus 1 is connected to the lower branch 31 via an insulating spacer 34, and a disconnector 2 is built in the main bus container of the main bus 1.

The circuit breaker 4 in the sealed container 30 is arranged for three phases, one end is connected to the disconnector 2, and the other terminal is connected to the sealed container 30.
A central conductor 35u provided in the axial direction.

35V and 35W, and current transformer coils 36u, 36v, and 36w are fixed surrounding these center conductors 35. At the upper end of the center conductor 35 is a substantially horizontal center conductor (connection conductor) 37 (37u, 37v).

37W) is fixed, and these rain center conductors 35.3
The number 7 makes almost a single character shape. center conductor 371,
All three phases of 37V and 37W are arranged on the same horizontal plane. The insulating spacers 38, 39 that provide gaseous separation between the breaker 4, the potential transformer 6, and the disconnector 7 are arranged so that the embedded center conductors 371, 37v, 37W are at each vertex of a triangle. The center conductor 37V connected to the conductor at the uppermost apex undergoes level conversion in the vicinity of the insulating spacers 38 and 39 and in the middle thereof, and is on the same horizontal plane as the center conductors 37u and 37W of other phases. It is bent to position. These three phase center conductors 37 are respectively connected to the center conductor 35 on the same plane.

Furthermore, the center conductor 37 is connected to the embedded conductor of an insulating spacer 39 attached to the branch part 33 of the sealed container 30, and guided into the terminal container 41 that houses the cable head 9.

That is, as shown in FIG. 4, the V-phase buried conductor is arranged above the center plane of the insulating spacer 39, and the remaining U-phase and W-phase are arranged in the center plane. Also, a center conductor 4211 connected to the embedded conductor of this insulating spacer 39
．． 42W is connected linearly on the central plane, and a disconnector stator 50u is attached to the tip thereof.

50W is installed. On the other hand, after the center conductor 42V is J&S attached in the axial direction of the embedded conductor, it is immediately bent at a nearly right angle, extended downward, further bent at a position almost symmetrical to the center of the insulating spacer 39, and then horizontally bent. The above-mentioned disconnector stator 5Q has a disconnector stator 5ON' at its tip.
It is attached so that the tips of u and 50W are almost on the same plane. These disconnector stators 50L+, 50V, 5
Disconnector collectors 53LI, 53V, 53W are provided at positions facing 0W, open and with the necessary insulation distance, and central conductors 5211, 52V, 52W are connected to these, and an insulator 58a and a support metal fitting 59 are installed. It is fixed to the terminal container 41 via. Furthermore, a center conductor 52u.

52V and 52W are bent gently downward so as to reduce the electric field strength on the surface of the conductor, and are connected to the cable head 9 near their tips. On the other hand, a grounding switch stator 40u, 40V, 40W is installed above these center conductors 52u+ 52v, 52W, and on the side opposite to these grounding switch stators 40u, 40v, 40W, and as necessary. The earthing switch movers 43u, 43V, and 43W are provided at positions that maintain a sufficient insulation distance, and the earthing switch stator 40 is lower than the upper level of the center conductor 42V; If the grounding switch stator 40 is installed by connecting the conductor 42 V straightly without bending, at least this grounding switch stator 40 will be connected to the center conductor 42.
As the terminal container 41 is positioned above V, the axial length of the terminal container 41 increases.

In addition, although the center conductor 52 is bent gently downward, this means that the center conductor 52 is connected in a straight line without bending, and if the disconnector collector 53 is attached above it, at least this disconnector collector 53 They become separated, and the diameter of the terminal container 41 increases.

The disconnector current collector 53 has a cylindrical shape, and a movable element 57 is provided inside thereof, which is attached to a common plate 54 and connected to the L' cover 6 via a link 55. There is. A rotating shaft 56a of the lever 56 passes through the terminal container 41 while keeping it airtight, and is rotated by an operating device (not shown). The rotation of the rotating shaft 562J causes the pendulum movement of the lever 56, and finally the mover 57 moves horizontally, and the stator 50
Opening/closing between the two is performed.

The earthing switch 8 is also almost the same as the disconnecting switch 7, and the movable element 43
is attached to a common plate 44 and connected to a lever 46 via a link 45.

A rotating shaft 46a of the lever 46 also passes through the terminal container 41 while keeping it airtight, and is rotated by an operating device (not shown).

One rotation of the rotation shaft 46a is controlled by &! of the lever 46. The movable element 43 finally moves up and down as a result of the zigzag movement, and the opening and closing between the movable element 43 and the stator 40 is performed. A guide rod 47 is coupled to the common plate 44, and this guide rod 47 is slidably fitted to a kite 48 to constitute a guide device.

In this way, a space is provided on the side opposite to the bushing 60 and a side part of the terminal container 41, and the earthing switch 8 is installed in the space on the side opposite to the bushing ioA, and the disconnector 7 is installed in the side space. When forming a branch part in the terminal container 41, it is necessary to have a shaft end that protrudes further than the branch part from the viewpoint of manufacturing and strength. Can be configured. Further, the terminal container 41 has a diameter that can accommodate the cable heads 9 for three phases, and the disconnector 7 can be constructed without increasing this diameter. Therefore, the whole can be made smaller, and the gas insulated switchgear can be completely downsized.

Another embodiment of the invention is shown in FIGS. 5 and 6. In this embodiment, the terminal container 410 of the pull-out terminal device 9a is
A space is provided on the opposite side of the bushing 10a and a side portion, respectively,
A disconnector 7 was provided in the space on the side opposite to the bushing 10a, and an earthing switch 8 was provided in the space on the side. In this case as well, the disconnector 7 and the earthing switch 8 are arranged in a space provided on the side opposite to the bushing 10a of the terminal container 41 and on the side.
The same effects as in the case described above can be achieved.

That is, the center conductors 42L1 and 42W connected to the embedded conductor of the insulating spacer 39 are connected in an M-line manner on the center plane,
Disconnector current collectors 531 and 53W are attached to the lower end of the terminal container 41 in the axial direction. On the other hand, center exclusive 4
2V is installed in the axial direction of the embedded conductor, and then immediately bent at a nearly right angle, extended downward, and connected to the insulating spacer 39.
It bends further at a nearly symmetrical position to the center and becomes horizontal.
A disconnector collector 53V is attached in the same way as the disconnector collectors 530 and 53W described above.

Disconnector stators 50u, 50V, 50W are provided on the side facing these disconnector current collectors 53u, 53V, 53W and at positions where the necessary insulation distance is maintained, and these are connected to the center conductor 5.
2u, 52V, and 52W, and is fixed to the terminal container 41 via an insulator 58a and a support fitting 59. Furthermore, a center conductor 52u.

52%', 52W is gently bent downward to reduce the electric field strength on the conductor surface, and the cable head 9 is disconnected from the cable head 9 near its tip. Also, the center conductor 521
For 1,52V, 52W, disconnector stator sou, 50V,
horizontally between the sow and the cable head 9 the earthing switch stator 40u;

4(1', 40W is attached), and on the opposite side, and at positions where the necessary insulation distance is maintained, earthing switch movers 43u, 43V, 43W are provided.

On the other hand, the level of the disconnector current collector 53 is lower than the upper level of the center conductor 42V, but if the center conductor 42V is connected to the m line without bending and the disconnector current collector 53 is installed, at least The disconnector current collector 53 is located above the center conductor 42V), and the axial length of the terminal container 41 increases.

In addition, the center conductor 52 was gently bent downward as in the case described above, but this is because the center conductor 52 is connected in a straight line without bending, and the earthing switch stator 40 is installed on top of the center conductor 52. At least in this horse switch stator 40, the diameter of the υ4 terminal container 41 increases from one part to another.

In this way, spaces are provided on the side opposite to the bushing 10a and on the side of the terminal container 41, and the disconnect switch 7 is provided in the space opposite to the bushing 10a, and the rubbing switch 8 is provided in the space on the side. Therefore, when forming a branch in the terminal container 41, a more protruding shaft end is required from the viewpoint of manufacturing and strength. can be configured. In addition, the terminal container 41 has a diameter that can accommodate the cable head 9 for three phases, and the earthing switch 8 can be configured without increasing the diameter, and the same effect as the above-mentioned ↓ν case can be achieved. can do.

FIG. 7 shows yet another embodiment of the invention. This embodiment is applied to a pullout terminal device 9b composed of a three-phase bushing 10 and a terminal container 42. In this case, similarly to the above case, spaces are provided on the opposite push/pull 10 side and the 1fl side of the terminal container 42, respectively.
A grounding switch 8 is provided in the space of the anti-bushing 10, and a disconnector 7 is provided above it. By doing so, the disconnector 7 and the earthing switch 8 are supported by the support frame 61, and the same effect as in the case described above can be achieved.

FIG. 8 shows yet another embodiment of the invention. This embodiment is also applied to a pullout terminal device 9b composed of a three-phase bushing 10 and a terminal container 42, as in the case described above. In this case, the earthing switch 8 was provided in a gap provided on the side of the terminal container 42, and the disconnector 7 was provided below the earthing switch 8. In this case as well, disconnector 7
Since the earthing switch 8 is housed in the terminal container 42, the same effects as in the above case can be achieved.

〔Effect of the invention〕

As described above, in the present invention, the disconnecting switch and the grounding switch are arranged in the space provided on the side opposite to the bushing and the side part of the terminal container, so that the entire terminal becomes a pebble and can be downsized. A gas insulated switchgear can be obtained.

[Brief explanation of the drawing]

2 is a front view of a conventional gas insulated switchgear, FIG. 3 is a front view of an embodiment of the gas insulated switchgear of the present invention, and FIG. 4 is a front view of a conventional gas insulated switchgear.
5 is a front view of another embodiment of the gas insulated switchgear of the present invention. FIG. 6 is an enlarged longitudinal sectional side view of the principal part of FIG. A front view of another embodiment of the gas insulated switchgear; FIG. 8 is a front view of still another embodiment of the gas insulated switchgear of the present invention. 1... Main bus bar, 2... Disconnector, 4... 3-phase breaker, 4a... 3-phase breaker, 7... Disconnector, 8
...Earth switch, 9...Cable head, 9a, 9
b... Output terminal device, 10, 10a... Bushing, 30... Seal container, 31, 32.33... Branch part, 34.3839... Insulating spacer, 41.42...
...Terminal container. 61...Support frame. Agent Patent Attorney Akio Takahashi Figure 1 Figure 2 Figure 4 Figure 5 Figure 6' Figure 7

Claims (1)

[Scope of Claims] 1. One terminal of a vertical three-phase circuit breaker containing a three-phase circuit breaker housed in a cylindrical sealed container is connected to the main bus bar, and the other terminal is connected to the connecting conductor of each phase. In a gas-insulated switchgear connected to a draw-out terminal device via the , a gas insulated switchgear characterized in that a grounding switch is disposed on the other side. 2. The gas insulated switchgear according to claim VJ1, wherein the disconnector is provided in the space portion on the side opposite to the bushing, and the earthing switch is provided in the space portion on the side portion. 3. The gas insulated switchgear according to claim 1, wherein the grounding switch is provided in the space portion on the side opposite to the bushing, and a disconnector is provided in the space between the side walls.