JPH0724443B2 - Gas insulated switchgear - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a gas insulated switchgear.

BACKGROUND OF THE INVENTION FIG. 1 shows a general skeleton of a gas-insulated switchgear having an instrument transformer. The other end of the breaker 4 having one end connected to the main bus 1 is connected to a cable head 9 via a disconnector 7. Grounding switches 3, 5 and 8 are connected to both ends of the circuit breaker 4 and the cable head 9 side of the circuit breaker 7, and an instrument transformer 6 is connected between the circuit breaker 4 and the circuit breaker 7. Has been done.

FIG. 2 shows an example of a conventional gas-insulated switch configured according to this skeleton. As shown in the figure, in the three-phase circuit breaker 4, the three-phase circuit breaker 4a is vertically arranged, and both terminals are led out from one side of the sealing device 30. Among them, the upper terminal is connected to the disconnector 7 formed in the conductor tube 10, and further connected to, for example, the cable head 9 of the lead-out terminal device 9a. This upper terminal and disconnector 7
A grounding switch 5 and an instrument transformer 6 are connected between and, and a grounding switch 8 is connected between the disconnector 7 and the cable head 9. On the other hand, the lower terminal of the circuit breaker 4 is connected to the main bus 1 via the circuit breaker 2, and the ground switch 3 is connected between the circuit breaker 4 and the circuit breaker 2.

In the gas-insulated switchgear configured as described above, as is clear from the figure, the upper conductor tube 10 has a length that exceeds the lower disconnector 2 and the main busbar 1 and is connected to the cable head 9. Connected, the cable hangs on the side of the main busbar 1 opposite the breaker. Therefore, the conductor tube 10 becomes long, and the occupied area as a whole becomes large.

[Object of the Invention]

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

[Outline of Invention]

That is, according to the present invention, in order to achieve the above object, the second phase disconnecting section stator provided on the center conductor of the second phase is passed between the first phase disconnecting section stator and the third phase disconnecting section stator. Also, the gas-insulated switchgear is arranged by arranging it below the first-phase and third-phase stators so that each phase grounding switch stator can be arranged near the position of the original second-phase center conductor. For example, the height can be reduced.

Example of Invention

Hereinafter, the present invention will be described based on the illustrated embodiments. One embodiment of the present invention is shown in FIGS. 3 and 4. Since the same parts as those of the prior art are designated by the same reference numerals, the description thereof is omitted. In this embodiment, the grounding switch 8 is arranged on the side of the terminal container 41 opposite to the drawer terminal device 9 so that the height of the gas insulated switchgear is reduced, for example.

That is, the sealed container 30 of the vertical circuit breaker 4 is formed with a branch portion 31 for leading out one terminal of the circuit breaker 4 at the lower portion, and two at the upper portion for leading out the other terminal of the circuit breaker 4. Branch portions 32 and 33 are formed in the radial direction, respectively. It is desirable that both the branch portions 32 and 33 are formed on the same horizontal line so as to face each other, but they may be slightly displaced in the circumferential direction of the sealed container 30. It is desirable that the branch portion 32 is formed above the branch portion 31. In any case, it suffices to have a pair of branch portions 32, 33 formed in the radial direction near the upper end of the sealed container 30.

The lower branch portion 31 is connected to the three-phase collective main bus 1 via an insulating spacer 34, and the main bus container of the main bus 1 has a disconnector 2 built therein.

The circuit breakers 4 in the sealed container 30 are arranged for three phases, one end is connected to the disconnector 2, and the other terminal is connected to the central conductors 35u, 35v, 35w provided in the axial direction of the sealed container 30, The current transformer coils 36u, 36v, 36w are fixed so as to surround these central conductors 35. A substantially horizontal center conductor (connection conductor) 37 (37u, 37v, 37w) is fixed to the upper end of the center conductor 35, and these center conductors 35, 37 form a substantially T-shape. The center conductors 37u, 37v, 37w are arranged on the same horizontal plane for all three phases. The insulating spacers 38, 39 for gas-separating the circuit breaker 4, the voltage transformer 6 and the disconnector 7 are arranged so that the embedded center conductors 37u, 37v, 37w are at the vertices of a triangle. The center conductor 37v connected to the conductor at the uppermost apex is level-converted in the vicinity of the insulating spacers 38, 39 and in the middle thereof, and the center conductor 37v of another phase is
It is bent so that it is located on the same horizontal plane as u and 37w.
The three-phase center conductors 37 are connected to the center conductors 35 at the same planes. Further, the center conductor 37 is an insulating spacer 39 attached to the branch portion 33 of the sealed container 30.
Of the embedded conductor and is guided to the inside of the terminal container 41 for housing the cable head 9.

That is, as shown in FIG. 4, the v-phase embedded conductor is arranged above the central plane of the insulating spacer 39, and the remaining u-phase and w-phase are arranged in the central plane. Further, the central conductors 42u and 42w (for example, the first phase and the third phase) connected to the embedded conductors of the insulating spacer 39 are linearly connected on the central plane, and the disconnector stators 50u and 50w are provided at the tips thereof. It is installed. On the other hand, the central conductor 42v (for example, the second phase) is immediately attached to the embedded conductor in the axial direction and then immediately bent at a substantially right angle, passes between the first phase and the third phase central conductors 42u42w, and extends downward. Then, it is further bent at a position substantially symmetrical with respect to the center of the insulating spacer 39 and becomes horizontal, and the second phase disconnector stator 50v is provided at the tip thereof with the above-mentioned first phase and third phase disconnector stators 50u, 50w.
And the tip is mounted so that it is almost flush.
On the side facing these disconnector stators 50u, 50v, 50w, and at a position that maintains the required insulation distance, disconnector collectors 53u, 53v, 53
w (first phase to third phase) is provided, and the central conductor 52
u, 52v, 52w are connected to each other and fixed to the terminal container 41 via an insulator 58a and a support fitting 59. Furthermore, the central conductors 52u, 52v,
52w is gently bent downward so as to reduce the electric field strength on the surface of the conductor, and is connected to the cable head 9 near the tip thereof. On the other hand, these central conductors 52u, 52v,
Ground switchgear stators 40u, 40v, 40w are installed above 52w.The ground switchgear is located on the side facing the ground switchgear stators 40u, 40v, 40w and at a position where a necessary insulation distance is maintained. Movable elements 43u, 43v, 43w are provided, and the grounding switch stator 40 is lower than the upper level of the center conductor 42v, but this is achieved by connecting the center conductor 42v in a straight line without bending. When the ground switch stator 40 is attached, at least the ground switch stator 40 is positioned above the central conductor 42v, and the axial length of the terminal container 41 increases. Also, the center conductor 52 was gently bent downward.
Are connected in a straight line without bending, and if the disconnector current collector 53 is attached to the upper part of the line, at least this disconnector current collector 53 must be removed, and the diameter of the terminal container 41 increases.

The disconnector current collector 53 has a cylindrical shape, and a mover 57 is provided inside thereof, which are attached to a common plate 54, and are connected to a lever 56 via a link 55. The rotating shaft 56a of the lever 56 penetrates the terminal container 41 while maintaining airtightness, and is rotated by an operating device (not shown). Rotating shaft 56
The rotation of a becomes a pendulum movement of the lever 56, and finally the mover 57 horizontally moves to open and close with the stator 50.

The ground switch 8 is also substantially the same as the disconnector 7, and the mover 43 is attached to the common plate 44 and is connected to the lever 46 via the link 45. The rotary shaft 46a of the lever 46 also penetrates while keeping the terminal container 41 airtight, and is rotated by an operating device (not shown). The rotation of the rotary shaft 46a becomes a pendulum motion of the lever 46, and finally the mover 43 moves up and down to open and close with the stator 40. A guide rod 47 is coupled to the common plate 44, and the guide rod 47 is slidably fitted to a guide 48 to form a guide device.

As described above, according to the present invention, the first and third phase disconnection section stators 50u and 50w provided on the first and third phase center conductors 42u and 42w on the insulating spacer 39 side are provided on the center side of the terminal container 41 at a predetermined interval. The second phase disconnector stator 5 arranged and provided on the second-phase center conductor 42v
0v is arranged between the first phase disconnecting section stator and the third phase disconnecting section stator 50w and below the first phase and third phase stators 50u and 50w, and each phase lead terminal device The central conductors 52u to 5 of each phase, which are drawn out from the reference numeral 9, and are extended to the stator side of each phase disconnection section
2w are arranged substantially parallel to each other, and the central conductors 52u to 52w are provided with first-phase to third-phase disconnecting current collectors 53u to 52w that open and close with the respective phase disconnecting part stators 50u to 50w, and each phase disconnecting part. First in the direction perpendicular to the opening and closing direction of the current collectors 53u to 53w
Also, the first-phase and three-phase grounding switch stators 40u and 40w are provided on the three-phase center conductors 52u to 52w, and the second-phase center conductor 52v is projected toward the insulating spacer side so that the second-phase grounding switch stator is provided. 40v is provided, and the grounding switch 8 for opening and closing the respective phase grounding switch movers 43u, 43v, 43w is arranged on each of the phase grounding switch stators 40u, 40v, 40w.

As a result, the second phase disconnector stator 50v provided on the second-phase center conductor 42v is replaced by the first phase disconnector stator and the third phase disconnector stator 5.
Passes between 0w and the first and third phase stators 50u and 50w
Since it is arranged on the lower side and the respective phase grounding switch stators 40u, 40v, 40w can be arranged near the position of the original second-phase center conductor 42v, the height of the terminal container 41 is reduced. As a result, the gas insulated switchgear can be reduced in size. Therefore, the entire size can be reduced, and the gas-insulated switchgear can be downsized.

5 and 6 show another embodiment of the present invention. In this embodiment, space portions are provided respectively on the side opposite to the bushing 10a of the terminal container 41 of the drawer terminal device 9a and on the side portion, the disconnection portion 7 is provided in the space portion on the side of the anti-bushing 10a, and the ground switch is provided in the side space portion. 8 is provided. Also in this case, the disconnecting switch 7 and the grounding switch 8 are arranged in the space provided on the side opposite to the bushing 10a of the terminal container 41, and the same effect as the above case is obtained. be able to.

That is, the central conductors 42u and 42w connected to the embedded conductors of the insulating spacer 39 are linearly connected on the central plane, and the tip ends thereof are attached to the disconnector collectors 53u and 53w below the axial direction of the terminal container 41. ing. On the other hand, the central conductor 42v is bent almost at a right angle immediately after being attached in the axial direction of the embedded conductor,
It extends downward and is further bent at a position substantially symmetrical with respect to the center of the insulating spacer 39 to become horizontal, and the above-mentioned disconnector current collector 53u,
As with 53w, a disconnector current collector 53v is attached.

The disconnector stators 50u, 50v, 50v, 53v, 53v, 53w, on the side facing the collectors 53u, 53v, 53w, and at the position where the required insulation distance is maintained.
50w is provided, central conductors 52u, 52v, 52w are connected to these, and fixed to the terminal container 41 via an insulator 58a and a support fitting 59. Furthermore, the central conductors 52u, 52v, 52w are gently bent downward so as to relax the electric field strength on the conductor surface.
It is connected to the cable head 9 near its tip.
Also, disconnector stators 50u, 50v, 50w are attached to the central conductors 52u, 52v, 52w.
And the ground head switch stator 40u, 40v, 40w are mounted in the horizontal direction between the cable head 9 and the cable head 9, and the ground switch mover 43u, 40u, 40v, 40w is installed on the opposite side and at a position keeping a necessary insulation distance. 43v and 43w are provided.

On the other hand, the disconnector current collector 53 is lower than the upper level of the central conductor 42v, which means that when the central conductor 42v is connected in a straight line without bending and the disconnector current collector 53 is attached, at least the disconnector The current collector 53 is located above the central conductor 42v, and the axial length of the terminal container 41 increases.

Further, the central conductor 52 was gently bent downward as in the case described above, but this is such that the central conductor 52 is connected in a straight line without bending, and if the grounding switch stator 40 is attached to the upper part of the central conductor 52,
At least this grounding switch stator 40 has to be separated, and the diameter of the terminal container 41 increases.

In this manner, since the space portions are provided on the anti-bushing 10a side and the side portion of the terminal container 41, the disconnector 7 is provided in the anti-bushing 10a side space portion, and the grounding switch 8 is provided in the side portion space portion, When forming a branch portion in the terminal container 41, a shaft end portion further protruding than the branch portion is required in view of manufacturing and strength,
The disconnector 7 can be constructed without enlarging the shaft end portion. Further, the terminal container 41 has a diameter capable of accommodating the cable heads 9 for three phases, and the grounding switch 8 can be configured without increasing the diameter, and the same effect as the above case can be obtained.

FIG. 7 shows still another embodiment of the present invention. The present embodiment is a case where the lead-out terminal device 9b is applied to a device including a three-phase bushing 10 and a terminal container 42. Also in this case, as in the case described above, the anti-bushing of the terminal container 42
A space portion was provided on each of the side 10 and the side portion, a ground switch 8 was provided in the space portion on the side opposite to the bushing 10, and a disconnector 7 was provided above it. By doing so, the disconnecting switch 7 and the grounding switch 8 can be housed in the terminal container 42 supported by the support frame 61, and the same effect as the above case can be obtained. .

FIG. 8 shows still another embodiment of the present invention. This embodiment is also a case where the lead-out terminal device 9b is applied to the one made up of the three-phase bushing 10 and the terminal container 42 as in the case described above. In this case, the grounding switch 8 was provided in the space provided at the side of the terminal container 42, and the disconnector 7 was provided below the grounding switch 8. Also in this case, the disconnector 7 and the grounding switch 8 are housed in the terminal container 42,
It is possible to achieve the same effect as the above case.

[Effects of the Invention] As described above, in the present invention, the second phase disconnection section stator 50v provided on the second-phase center conductor 42v is connected to the first phase disconnection section stator and the third phase disconnection section stator 50v.
It is arranged between the phase disconnecting section stator 50w and below the first phase and third phase stators 50u and 50w, and each phase grounding switch is provided near the position of the original second phase center conductor 42v. Stator 40u, 40v, 4
Since 0w can be arranged, the gas insulated switchgear can be reduced in size.

[Brief description of drawings]

FIG. 1 is a skeleton diagram of a gas-insulated switchgear, FIG. 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. Fig. 3 is an enlarged vertical side view of the essential parts, Fig. 5 is a front view of another embodiment of the gas insulated switchgear of the present invention, Fig. 6 is an enlarged vertical side view of the essential parts of Fig. 5, and Fig. 7 is a book. FIG. 8 is a front view of still another embodiment of the gas-insulated switchgear of the invention, and FIG. 8 is a front view of yet another embodiment of the gas-insulated switchgear of the present invention. 1 ... main busbar, 2 ... disconnector, 4 ... three-phase sushi and disconnector,
4a …… 3-phase wire or break, 7 …… disconnector, 8 …… grounding switch, 9 …… cable head, 9a, 9b …… drawing terminal device, 10,10a …… bushing, 30 …… sealed Container, 31,32,33
...... Branch part, 34,38,39 …… Insulating spacer, 41,42 …… Terminal container, 61 …… Supporting stand.

Claims (1)

[Claims] 1. A three-phase vertical circuit breaker (4) in which one terminal is connected to a main bus (1) is housed in a cylindrical hermetic container (3), and the other of the three-phase vertical circuit breakers is housed. In the gas-insulated switchgear in which each phase of the side terminals is connected to a three-phase center conductor supported by an insulating spacer, and the other side of the three-phase center conductor is connected to a lead terminal device (9a), the other of the circuit breakers is provided. Of the three-phase center conductors connected to the side, two-phase center conductors are provided in parallel, and the remaining one-phase center conductor is
The core conductors of the three phases are bent downward through the center conductors of the phases, the center conductors of the three phases are connected to the disconnector stator in the lead-out terminal device, and the stator of one phase (50v) is Stator (50u,
w) below, and facing the three-phase disconnector stator, disconnector current collector (53u, v,
w) is provided, and a three-phase ground switch stator (40u, v, w) is provided in the space created above the lead-out terminal device by bending the central conductor of the one phase downward. A mover (43u, v, w) of the grounding switch is provided so as to face the three-phase grounding switch stator, and a cable head (via a connecting conductor extending below the disconnector current collector). 9) and the connection conductor is fixed to the disconnector in a space formed in the radial direction in the lead terminal device by bending the connection conductor in the radial direction of the lead terminal device at a connection portion with the cable head. A gas-insulated switchgear provided with current collectors for a child and a disconnector.