JPH01103104A - Cubicle type gas-insulated switching device - Google Patents

Abstract

PURPOSE:To miniaturize the title device and reduce cost therefor, by a method wherein a line side disconnecting switch and a breaker are arranged so as to be positioned in up-and-down while a bus side disconnecting switch and a primary side disconnecting switch for a transformer are arranged at the side of the breaker so that the axial lines thereof are in up-anddown directions in the relation of back-to-back. CONSTITUTION:A lightening arrestor SA, a circuit breaker CB, a line-side disconnecting switch DS1, a bus-side disconnecting switch DS2, a primaryside disconnecting switch DS3 for a transformer and earth switches ES1-ES4 corresponding to respective instruments are provided in a cubicle type vessel 102, supported on the box 101 of an operating device. A bushing B is provided on a ceiling wall at one end of the cubicle type vessel 102 while the line-side disconnecting switch DS1 is arranged above the circuit breaker CB. The bus-side disconnecting switch DS2 and the primary-side disconnecting switch DS3 for the transformer are arranged back-to-back at the side of the circuit breaker CB. According to such arrangement of instruments, reduction of the length of the vessel 102 is contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cubicle-type gas-insulated open-circuit device configured by housing one device in a cubicle shape 3.

[Prior art] A gas-insulated switchgear installed between a railway line and a transformer is
A line lead-in means consisting of an overhead wire lead-in bushing or a cable head, a line-side disconnector whose one end is connected to the line-side disconnector, a circuit breaker whose one end is connected to the other end of the line-side disconnector, and a circuit breaker. A busbar side disconnector having one end connected to the other end and the other end connected to the busbar, and a transformer primary side disconnector having one end connected to the busbar and the other end connected to the primary side of the transformer. These devices are housed together for three phases in a cubicle-shaped container filled with insulating gas. Each disconnector includes a fixed contact and a movable contact supported on a base via an insulating support, and the movable contact and the fixed contact move toward and away from each other in the axial direction.

FIG. 4 is a skeleton (single line diagram) showing an example of the electrical configuration of each phase of this type of gas-insulated 5A switch used when receiving power from two lines, a regular line and a protection line.

In the figure, Ul and U2 are first and second gas insulated switchgear connected to the line L1 constituting the regular line and the line 1-2 constituting the protection line, respectively. Each gas insulated switchgear has a track side disconnector DS1, one end of which is connected to the track via a bushing BS (or cable head) constituting a track lead-in means, and one end of which is connected to the other end of the disconnector DS1. Circuit breaker CB, Ff1 line BLISa and BUSb, the other end of "al!yi circuit CB and bus line BtJ
A transformer connection part Cg that connects the busbar side disconnector DS2 connected between the bus bar side disconnector DS2, the voltage detection device VD, the current transformer CT, the Wl lightning device LA, and the switchgear unit and the transformer.
t, the transformer primary side disconnector DS3 provided between the bus bar BUSb and the transformer connection part Cot, and the line side ground ftt.
It is composed of an lffl switch ESI, circuit breaker inspection grounding switches ES2 and ES3, and a transformer primary side grounding switch ES4.

In this example, disconnectors DSI, DS2, circuit breakers CB, and ground rMmlES1, ES3. ! :, the itz device LA, the voltage detection device VD, and the current transformer CT constitute a line-to-bus switching circuit that connects the line and the bus. The buses BUSa and BUsb are usually composed of reciprocating conductors having an outbound conductor and a return conductor, and are connected to the buses 1i113 U Sa and B of the gas insulated switchgear U1 and U2.
The USBs are connected to each other, and a power supply and demand instrument transformer MOF is connected between both buses.

Lines 1-1 and L2 are connected to the bushings BS of the gas-insulated closed stomach L11 and U2, respectively, and the transformer connection Cgt
Transformers TRI and TR2 are connected to respectively.

When constructing a gas-insulated l1IrrI headpiece as described above, conventionally, each device was arranged in sequence according to a skeleton. FIG. 5 shows the mechanical configuration of the conventional gas insulated switchgear VII device, and the first gas insulated switchgear QtJ shown in FIG.
1 is shown as an example. In the figure, 1 is an operation box which also serves as a stand, and 2 is a cubicle-shaped container supported on the operation box 1. The inside of the container 2 is partitioned into first to third equipment storage chambers 2a to 2C by partition walls 3 and 4, which are 1iQG-pulled through the side walls and ceiling wall. Attach the bushing BS to the nozzle holder 2△ installed on the ceiling wall through the bushing support pipe 2B.
is installed. A line-side disconnector 081, an earthing switch ESI, and a ``!iI detonator are housed in the first 11 device storage chamber 2a, and a current transformer CT is attached to the conductor 5 connected to the center conductor of the bushing BS. has been done.

Inside the second equipment storage room 2b are a blocker 1gi CB and a blocker II.
Ground f to ground both ends of the ``a disconnector'' when inspecting the CB of product i.
ffl I'! II 75 ES 2 and ES 3. !
:, Busbar [1 disconnector ZDS2 and 3 phases are stored together, and transformer 21! Primary side disconnector DS3 is stored in the equipment storage room 2C.
and ground-to-ground rfI device FS4 are housed together for three phases.

The center conductor of the bushing 88 is connected to one end of the "a" disconnector CB via the conductor 5, the disconnector DS1, and the conductor 6 penetrating the hole 3a provided in the partition wall 3.
The other end of B is connected to one end of the disconnector DS2.

Three openings are arranged diagonally in a straight line on the side wall of the equipment storage chamber 2b, and three-phase insulating spacers 7 are attached to these openings. Insulating subena 7 for each phase
The outgoing W1 conductor that constitutes the busbars BUSa and BUSb is supported, and the three-phase reciprocating conductor is housed in a busbar container provided individually for each phase and connected to adjacent equipment (see Fig. 4). In the example, it is connected to MOF). and F
! JI! A disconnector D is installed on the outgoing conductor that constitutes IIBUSa.
The other end of S2 is connected, and the return conductor constituting the rJ line eusb is the conductor 9a of the insulating spacer 9 attached to the partition wall 4.
The connecting conductor 8 is connected to one end of the connecting conductor 8. The other end of the conductor 9a of the insulating spacer 9 is connected to one end of the transformer primary side disconnector DS3, and the other end of the disconnector connects the connecting conductor 10 and the opening 2D provided in the end wall of the container 2 in an airtight manner. The bushing mounting provided so as to extend around the inside of the transformer is connected to the center conductor of a transformer connecting bushing B which is mounted through the plate 11 in an airtight manner. When installing the bushing, connect pipe 1 to root 11.
2 is connected, and the other end of the connecting pipe is connected to the transformer "fiTR".
1 container. A conductor connection part is provided at the end of the connection conductor 10 to connect the bushing B in a removable manner, and the conductor connection part serves as a transformer connection WCot to connect the transformer to the gas cutoff RrMrM equipment.

SFs gas is sealed in the container 2 and the bushing support tube 2B at a predetermined pressure.

Inside the operator box 1, there is an operator 15 for the circuit breaker CB, an operator 16 for the disconnector DS1, an operator 1 for the grounding switch ES2, and an operator 1 for the disconnector DS1.
7. Earthing switch ES2, ESa operating device 18, disconnecting switch DS2 operating device 19, disconnecting switch 3083 operating device 20
and an operating device 21 for the earthing switch ES4 are housed, and these operating devices are connected to the operating section of a predetermined device in the container S2 via a crank mechanism or the like.

The other gas insulated IFOrw device HU2 has an insulating spacer 7
The structure is similar to that of the gas insulated switchgear WIU1 except that the gas insulated switchgear WIU1 is provided on the opposite side.

[Problems to be Solved by the Invention] In conventional gas insulation nm Vt4, devices such as circuit breakers and disconnectors housed in the cubicle-shaped container 2 are arranged along the skeleton in the longitudinal direction of the cubicle-shaped container. Cubicle-shaped containers 2
It was inevitable that the length would become considerably long, and the equipment would become larger, requiring gas-insulated switchgear! The problem was that it required a lot of space.

In addition, since the length of the container 2 is long, the bottom wall and side walls of the container cannot be formed from one steel plate of a fixed length. It was necessary to add steel plates by welding. As a result, there have been problems in that the yield of materials for the cubicle-shaped container is poor and the number of manufacturing steps is increased. Furthermore, in conventional gas insulators, in order to increase the length of the container 2, partition walls 3°4 were provided to give the container strength; however, these partition walls penetrate the side and ceiling walls of the container. Since the container was installed in a tilted state, the structure of the container was 12Wi, and its processing was troublesome. Furthermore, since there are many welded parts in the cubicle-shaped container, there is a problem in terms of reliability in maintaining airtightness.

The purpose of the present invention is to reduce the length of the cubicle-shaped container, thereby reducing the size of the device, and also to reduce the size of the material by eliminating the need to form the bottom wall and side walls with a single steel plate within a fixed size. An object of the present invention is to provide a gas insulating R1 device which can improve the yield and improve the reliability of air retention by avoiding a reduction in the number of welding parts.

Means for Solving Problem E] 15flS between gas insulations targeted by the present invention! The i-position includes a track lead-in means, a track-side disconnector whose one end is connected to the track-side disconnector, a circuit breaker whose one end is connected to the other end of the track-side disconnector, a busbar, and the other end of the breaker. Insulating gas seals the busbar side disconnector, which has one end connected to the busbar and the other end to the busbar, and the transformer primary side disconnector, which has one end connected to the busbar and the other end to the primary side of the transformer. Each disconnector consists of a movable contact and a fixed contact supported on the disconnector base via an insulating support, facing each other in the axial direction. b of the structure that brings them together and separates them.
use.

The present invention makes it possible to reduce the length of the cubicle-shaped container in such a gas-insulated switchgear.

In the present invention, the line lead-in means is attached to one longitudinal end of the cubicle-shaped container.

The track-side disconnect switch is placed closer to the other end of the container than the track lead-in means, and is placed at the top of the container with its axis directed in the longitudinal direction of the container. ■It is supported by the wall, and the circuit breaker is placed below the line-side disconnector and supported in an upright position on the bottom wall of the container.

Further, a reinforcing plate having a plate surface perpendicular to the direction of penetration of the container is arranged at a lower position closer to the other end of the container than the IJI1gi container, and the reinforcing plate is connected to the bottom wall of the container and the bottom of the container. They are respectively joined to side walls facing each other in the width direction.

The busbar side disconnect switch is placed on the surface of the reinforcing plate on the breaker side, and the transformer primary side disconnect switch is placed on the side of the reinforcing plate opposite to the breaker with their axes oriented vertically. Installation is completed.

The three-phase busbars are arranged triangularly above the reinforcing plate and are attached to the side wall of the container via insulating support means.

[Operation of the invention] As described above, in the present invention, instead of arranging each device sequentially along the longitudinal direction of the soil according to the skeleton, the ζ line-side disconnector and the circuit breaker are arranged above and below, respectively. The busbar side disconnector and the transformer primary side disconnector are placed back to back on the side of the circuit breaker with their respective axes facing in the vertical direction. When arranged in this way, the height of the container is slightly higher than that of conventional gas-insulated switchgear, but the length of the container can be significantly shortened, and the bottom wall and side wall cap of the cubicle-shaped container can be adjusted to standard dimensions. It becomes possible to form the steel plate using one of the steel plates.

In addition, by providing a reinforcing plate as described above, the container can be reinforced, so the three-phase busbars can be installed in a triangular arrangement above the reinforcing plate without reducing the strength of the container. be able to. If the 3-phase busbars are installed in a triangular arrangement, 3
Compared to the case where the phase busbars are arranged diagonally in a straight line and the mounting numbers are installed, the space inside the container can be significantly saved, and the container can be made smaller.

The reinforcing plate may be simply welded to the inner surface of the container, and there is no need to pass through the side wall of the container, so the reinforcing plate can be easily attached.

Furthermore, as mentioned above, a line side disconnector is mounted on the top 11 wall of the container, and a busbar side disconnector and a transformer primary side open circuit are attached to the reinforcing plate.
By supporting the device, there is no need to provide a frame specifically for supporting the device inside the container, so the structure can be simplified.

In addition, when configured as above, the bottom wall and side wall of the container S are 1
Since it can be formed from a single steel plate, the number of melting points can be reduced and the reliability of airtightness can be improved.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

1 to 3 show an example of the configuration of a gas insulated switchgear U1 in which the circuit shown in FIG. 4 is implemented according to the present invention, and FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a top view showing the arrangement of two gas insulated units at 0]5A, U1°U2, and the arrangement of transformers.

In FIG. 1, 101 is a control box, and 102 is a control box 1.
It is a cubicle-shaped container supported on 01. Inside the container 102 are Mm3mA, a circuit breaker C[3, a line side disconnector DS1, a bus line side disconnector DS2, a transformer primary side disconnector DS3, a line side ground 11'13ES1, and a ground for checking the circuit breaker. Switches ES2 and ES3 and transformer primary side grounding switch ES4 are housed together for three phases, and an overhead line lead-in bushing BS is installed at one end of the ceiling wall of the container 102.
is installed. Further, a three-phase all-in-one insulating spacer 104 that collectively supports three-phase reciprocating conductors 104u to 104W is attached to an opening provided in the side wall of the container 102. The reciprocating conductors 104u and 104W each have an outgoing conductor and a return conductor compactly put together (for example, in a concentric arrangement), and the four outward conductors are connected to the bus line BUS in FIG.
a, and the return conductor is used as the bus line BUSb.

In this embodiment, a bushing [3
8 is installed, and the track side disconnector DS1 is *fliV!
i: Arranged above CB. In addition, the busbar side disconnector D
S2 and transformer primary side disconnection P! ! The DS3 is placed back to back on the side of the CB, and due to the arrangement of these devices,
The length of the container 102 is reduced.

The frontage provided on the end wall on the other end side of the container 102 has 3
One end of the cylindrical container 106 is connected via an insulating spacer 105 that collectively supports phase conductors 105u to 105w (105v is not shown). Cylindrical container 1
7 langes at the other end of the cylindrical container 106 are used to attach a bushing B for connecting the transformer, and a plate 107 is attached to the other end of the cylindrical container 106 to attach the bushing to the plate 107. Bushing B for connecting the transformer is removed.
I'm being fucked. When installing the bushing, one end of a connecting pipe 108 is connected to the plate 107, and the other end of the connecting pipe 108 is connected to the container of the transformer TR1.

At the top of the cylindrical container 106, there is a bushing T for applying a test voltage.
A nozzle stub 106a is provided for connecting the nozzle 8, and this nozzle stub 106a is normally (when not performing a test) airtightly covered by a cover plate.

To explain the configuration of each part in more detail, the cubicle-shaped container 102 includes a rectangular bottom wall 102a, and a rectangular bottom wall 102a.
Front and rear end walls 102b and 102G whose lower ends are joined to one end and the other end in the longitudinal direction of 02a, respectively, and a bottom wall 102
102 d of left and right side walls whose lower ends are respectively joined to both ends in the width direction of a.

102e (see FIG. 2) and a ceiling wall 102f, and these walls are joined by welding.

The bottom wall 102a of the container is made of a single thick steel plate of standard size. The left and right side walls 102d and 1028 are made of a single thin steel plate with regular dimensions, and these side walls 102d
, 102e are reinforced by corrugation processing.

The ceiling wall 102f is a thick steel plate 1 located at one end of the container.
02f1 and position I on the other end of the container! Thin steel plate 10
2f2 joined by welding 1. One wall of the ceiling is formed to have a chevron-shaped cross-section as shown in FIG.

The end wall 102b is made of a single thin steel plate within a standard size, and the end of the end wall on the ceiling wall side is cut into a shape corresponding to the cross-sectional shape of the ceiling wall.

A manhole m is formed in the r8i8 wall 102b, and the manhole is hermetically closed by a cover plate 102A.

The end wall 102C is made of one thick steel plate within a standard size, and the end of the end wall on the ceiling wall side is also cut into a shape corresponding to the shape of one side of the ceiling wall.

Holes h1 for mounting three-phase bushings are arranged in the width direction of the container in a part of the thick steel plate of the ceiling wall 102f that is closer to one end of the container. The lower end of the nozzle 110 is connected to. An overhead wire lead-in bushing 83 is attached to the upper end of each nozzle 110, and a current changing PJCT is attached to the nozzle 110. The internal gas space of the bushing BS and the inside of the container 102 are connected to an insulating spacer 11 attached to the inner periphery of the hole h1.
Gas is classified by 1.

One end of a connecting conductor 112 is connected to the center conductor of the bushing O8, and an electrode 113 is attached to the connecting conductor 112. Also, the voltage detection electrode 11 facing the electrode 113
4 is supported on the end wall of the container 102 via an insulating support, and the electrodes 113 and 114 constitute a voltage detection device VD.

1? ! In order to support tZLA, an opening h2 is provided in the bottom wall 102a at a position slightly closer to the other end of the container than directly below the bushing BS, and a cylindrical body 115 is provided around the opening h2. It is joined. The lightning arrester LA is formed into a vertically long cylindrical shape, and its lower end is connected to the cylindrical body 115.
It is slidably fitted and supported by the inner periphery of a 'iIII snow machine supporting cylinder part 115a provided at the bottom of the snow machine. Although not particularly shown, a gasket is disposed between the cylindrical portion 115a and the lightning arrester LA, and the gasket is used to keep the fitting portion of the lightning arrester LA and the cylindrical portion 115a airtight.

A circuit breaker CB is arranged at a position closer to the other end of the container than the lightning arrester 8. Interceptor C [3 is SF
This circuit breaker consists of a known gas circuit breaker in which a fixed contact and a movable contact are housed in a suitable arc-extinguishing mechanism and a tray within a II-quality insulation volume filled with 6 gases. It is placed in a facing state (in an upright state), and its lower end is fixed to the bottom: 1102a.

A line-side disconnector DS1 is arranged above the cutoff ice. This disconnector is mounted on a hollow base 120 that also serves as a shield, and a ■-shaped insulating support 1 is mounted on the base 120.
It consists of a fixed contact element 122 and a movable contact element 123 supported via a base 1.
An operating force transmission mechanism a for transmitting an operating force to the movable contact element is disposed within the movable contact element. Fixed contact Niremen 1
122 has a structure in which a tulip-shaped fixed contact is covered with a shield, and the movable contact element 123 has a structure in which a rod-shaped movable contact 123a that approaches and separates from the fixed contact is covered with a shield. Fixed contact element 122
and the movable contact element 123 are arranged facing each other with their respective axes aligned, and the mounting is performed by operating the output shaft 124 of the operating force transmission mechanism disposed in the stand 120 and the movable contact 123a of the movable contact element 123. Operation axis 1
25 are connected to each other via an insulating rod (not shown).

The disconnector DS1 for each phase is installed with its axis directed toward the longitudinal direction of the container 102, and the stand 120 is placed on the ceiling of the container. i! !
It is attached to the container M1102 by bolting to the thick portion 102f1 of 102f. In this embodiment, each line-side disconnector DS1 connects its fixed contact element 122 to one end of the container 102 (the left end in FIG. 1).
It is placed facing towards.

Further, the disconnector DSI used in this embodiment includes a grounding switch that grounds the fixed contact element 122 and the movable contact element 123, respectively.

In the illustrated example, the fixed contact element 122 and the movable contact element 123 are provided with first and second grounding fixed electrodes 126 and 127, respectively. Rotating first and second grounding movable electrodes 128 and 129
However, the mounting is supported by a stand 120. In this example, the first fixed electrode 126 and the movable electrode 128 form the track side grounding switch ES1, and the second fixed electrode 127 and the movable electrode 1
29 respectively constitute a circuit breaker inspection earthing switch ES2.

One end of a connecting conductor 130 is connected to the fixed contact element l-122 of the disconnector DS1, and the other end of the connecting conductor 112 is connected to the other end of the connecting conductor 130. In addition, the movable contact element 123 of the new circuit device DS1 is connected to the connecting conductor 1.
31 and is connected to the rotating contact side terminal of the circuit breaker CB.

A conductor connecting portion 132 is provided at the other end of the connecting conductor 130, and a terminal at the upper end of the lightning arrester LA is removably connected to the conductor connecting portion 132. The conductor connection part 132 constitutes an opening part that opens and closes between the M electric appliance LA, the bushing BS, and the disconnector DS1, and the lower end of the lightning arrester LA is pulled in the operation box 101 to displace the lightning arrester LA downward. By connecting the terminal of the yX1 lightning device to the conductor connection part 132
It has become possible to separate it from the

At a position closer to the other end of the container than circuit breaker CB,
Reinforcement plate 1 having a plate surface perpendicular to the direction of force applied to the container 102
35 is arranged, and the reinforcing plate 135 is attached to the bottom wall 1 of the container 102.
02a and left and right side walls 102d.

102e. The height of the reinforcing plate 135 is set to be slightly smaller than 1/2 of the length n of the container 102, and bus-side disconnectors DS are provided on both sides of the reinforcing plate 135.
2 and a transformer S primary side disconnector DS3 are installed back to back.

To explain in more detail, the disconnectors DS2 and DS3 have the same structure as the disconnector DS1 except that a grounding switch is provided only on the fixed contact element 122 side, and the disconnector DS2 has a reinforcing plate. It is attached to the surface of the circuit breaker CB side of the circuit breaker 135 with its axis directed in the vertical direction and with the movable contact element 123 positioned on the upper side.

Further, the disconnector DS3 is mounted on the surface of the reinforcing plate 135 opposite to the switch with its axis oriented in the vertical direction and with the movable contact element 1-123 positioned on the upper side.

The fixed contact element of the busbar side disconnector DS2 is connected to the movable contact side terminal of the cutoff ICO via the connecting conductor 136. The fixed electrode 126 provided on the fixed contact element of the disconnector DS2 and the movable electrode 128 mounted on the stand 120 are connected to the earthing switch E for circuit breaker inspection.
S3 is configured.

The side wall 102d of the cubicle-shaped container 102 has an opening 6 located above the reinforcing plate 135 for attaching the busbar.
A three-phase, wire-shaped insulating spacer 104 is attached so as to airtightly cover the opening. In order to install this insulating spacer, it is necessary to provide an opening in the side wall of the container, but in the present invention, an opening is provided inside the container.
Since the reinforcing plate is welded, the strength of the container will not decrease even if an opening is provided in the side wall of the container.

Three-phase reciprocating conductors 104U to 104W are supported by the insulating spacer 104, and these three-phase reciprocating conductors are arranged in a triangular manner so that their central axes pass through the vertices of an isosceles triangle or an equilateral triangle. The outgoing conductors of these reciprocating conductors are connected via connecting conductors 137 to the movable contact element I.123 of the three-phase disconnector 'S D S 2. The three-phase reciprocating conductors 104U to 104W are housed in a three-phase wire-shaped busbar container 161 (see FIG. 3) and connected to the adjacent iF3.
connected to.

One end of a connecting conductor 138 is connected to the return conductor of the reciprocating conductors 104u to 104W, and the other end of the connecting conductor 138 is connected to the movable contact element 123 of the three-phase transformer primary side disconnector DS3.

The fixed contact element 122 of the three-phase disconnector DS3 connects to the conductor 105 of the insulating spacer 105 via the connection conductor 139.
It is connected to LJ or 105w.

The fixed electrode 126 provided on the fixed contact element 122 of the new path 2SDS3 and the IITi pole 128 supported on the mounting base 120 constitute the transformer 3 primary earthing switch ES4.

In this embodiment, the ends of the bodies 105u to 105w supported by the insulating spacer 105 facing into the cylindrical container 106 are transformer connection parts CtlJ, and these transformer connection parts connect the connection conductor 145. It is connected to one end of the center conductor of the transformer connection bushing port through the connector. The center of the bushing port for connecting the transformer! ) The other end of the body is the connecting pipe 108
The transformer TR is connected via a connection conductor (not shown) provided inside the
Connected to the primary side terminal of 1.

Note that when an oil-filled transformer is used as the transformer TR1, the connection pipe 108 is filled with insulating oil, and a gas-oil partition bushing is used as the transformer connection bushing B.

Inside the operator box 101, there are an operator 150 for the circuit breaker CB and an operator 1151 for the disconnector DS1. ! :, Earthing breaker E
SI operating device 152 and grounding jumpers ES2 and ES3
An operator 153 for disconnector DS2, an operator 154 for disconnector DS2, and disconnector 2! ; An operating device 155 for the DS3 and an operating device 156 for the earth-to-ground II ESA are housed, and these operating devices are operated in a predetermined manner through operating shafts led out with an airtight structure in the operating device box 101. Connected to the control section of the device.

In Figure 1, 'a' shows only one phase of equipment such as vessels and disconnectors, but inside the cubicle-shaped container 102, three-phase m equipment is arranged in exactly the same way as shown in the paper of the figure. They are stored side by side at right angles to.

Cubicle adjective 2! : inside 102, inside cylindrical container 106,
SFg gas is kept in the overhead line lead-in bushing BS at a predetermined pressure, for example, a pressure near atmospheric pressure (0.5kOf
/cIi).

In the above embodiment, the bushing 8 is used as the track lead-in means.
8 to draw in the overhead wire, but the bushing [
3S can be removed and the cable head CHd can be installed as a line lead-in means directly below the part where the bushing BS was attached instead, so that the cable C can be drawn in. In this case, the cable C is covered with a current transformer CT. In addition, when using the cable head C11Cj in this way, a voltage detection electrode 114' is attached to the inside of the cover plate 102A that opens the manhole m via an insulating support, and the electrode 114- is used for charging the cable head CHd. A voltage detection device VD is configured to face the section.

The configuration of one gas insulated switchgear δU1 among the two gas insulated switchgears configuring the circuit shown in FIG. 4 has been explained above.
The gas insulated switchgear U2 used is constructed in the same manner as the gas insulated switchgear U1 except that the insulating spacer 104 is provided on the opposite side wall of the container.

The two gas insulated switchgears U1 and U2 configured as described above are connected to transformers TR1 and TR as shown in FIG.
2 are arranged side by side, gas insulating between 111 device 1
, U2, a container 160 to which a single transformer MOF for electric power demand and supply is connected is arranged.

And the insulating spacer 104 of the gas insulated opening rr1 device U1
and the container 160 and between the gas insulation rrl device 1ffU
The insulating spacer 104 of No. 2 and the container 160 are connected by three-phase wire-type bus containers 1, 61, and 161, respectively, and the reciprocating conductors constituting the m-line BLISa and BUSb are housed in these bus containers. . Bus bar BUSa and BU
Sb is connected to the transformer MOF via a 1gC conductor located within the vessel 160.

Gas insulated IFO [! The installation supporting the bushing 8 for connecting the transformer of U1 and U2 is done by the plate 107 and the transformer T.
Connecting pipes 108 and 108 connect R1 and TR2 to the containers, and the bushings 8 of gas-insulated switchgears U1 and U2 and the transformers TR1 and TR2 are connected through connecting conductors arranged in these connecting pipes 108. A connection is made between the primary side terminal and the primary side terminal.

In the above embodiment, the fixed contact element of the disconnector DS1 was arranged toward one end of the container (the left end in FIG. 1), but the direction of the disconnector 3DS1 was reversed 180 degrees The contact element may be placed toward one end of the cubicle-shaped container 102. Similarly, the orientation of the disconnectors DS2 to DS3 can be reversed by 180 degrees and installed.

In the above embodiment, the bushing BS as a track lead-in means was attached to the ceiling wall at one end in the longitudinal direction of the container 102, but in the present invention, the bushing BS as a track lead-in means may be attached to one end in the longitudinal direction of the container. The bushing BS can also be attached to the upper part of the end wall 102b at one end in the longitudinal direction of the bushing 102 in a state in which it projects obliquely upward from the end wall 102b.

In the above embodiment, the three-phase wire-shaped insulating spacer 104 was attached above the reinforcing plate 135 and the three-phase FFL line was supported on the insulating spacer, but in the present invention, the three-phase busbar is attached to the reinforcing plate. They may be arranged in a triangular shape above and supported on the side wall of the container via insulating support means, and are not limited to the case where they are supported by three-phase, conical insulating spacers.

For example, three openings (through holes) are formed in a triangular arrangement on the side wall of the container 102, located above the reinforcing plate 135, and
Insulating support means for supporting the bus bars of each phase are provided for each phase, and insulating support means for supporting the bus bars of three phases are provided for each phase.
It can also be installed in one opening. In this way, when the three-phase busbars are supported by insulating support means provided individually for each digit, an insulating support means may be used as an insulating support means, or a bushing may be used. In particular, when bushings are used as insulating support means for supporting the busbars of each phase, the creepage distance can be increased, so the diameter of the hole (installation number) of the insulating support means can be made smaller, reducing the strength of the side wall of the container. You can prevent this from happening, and it's to your advantage.

As mentioned above, if the three-phase busbars are arranged in a triangular arrangement, the space inside the container can be significantly saved compared to the case where the three-phase busbars are arranged diagonally in a straight line or in an L, and the container can be made smaller. can be achieved.

In the above embodiment, the bus bar is constituted by a reciprocating conductor, but M
Of course, in the case of connection without using an OF, each bus bar is constituted by a single conductor.

[Efficacy of invention! ! ! ] As described above, according to the present invention, instead of arranging each device sequentially along the longitudinal direction of the container according to the skeleton, the track side disconnector and the circuit breaker are arranged one above the other. However, the busbar side disconnector and the transformer primary side disconnector are placed back to back on the side of the circuit breaker with their respective axes facing up and down, so the length of the container can be shortened and the cubicle shape can be reduced. The bottom wall, side walls, etc. of the vessel can be formed from one steel plate within a standard size. Therefore, it is possible to reduce the size of the apparatus, improve the yield of steel plate material, and reduce costs.

In addition, in the present invention, since the reinforcing plate is provided to reinforce the container, the three-phase busbars can be mounted in a triangular arrangement above the reinforcing plate without reducing the strength of the container.
Compared to the conventional gas-insulated switchgear δ in which three-phase busbars are arranged diagonally in a straight line, space inside the container can be saved.

Furthermore, in the present invention, the line-side disconnect switch is supported on the ceiling wall of the container, and the busbar-side disconnect switch and the transformer primary-side disconnect switch are supported on the reinforcing plate. There is no need to provide the same, and the structure can be simplified.

Further, according to the present invention, since the bottom wall and side wall of the container can be formed from a single steel plate, there is an advantage that the number of welding points can be reduced and the reliability of airtightness can be improved.

[Brief explanation of the drawing]

1 to 3 show embodiments of the present invention,
FIG. 1 is a schematic top view showing the configuration of the opening device unit, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a top view showing the arrangement of the unit and the transformer. Further, FIG. 4 is a single line diagram showing the electrical configuration of each phase of the gas insulated switchgear of the present invention, and FIG. 5 is a longitudinal cross-sectional view showing the configuration of a conventional gas insulator m neck. 101... Operator box, 102... Cubicle-shaped container, 102 a-... Bottom wall, 102b, 102C...
End wall, 102d, 102e...Side wall, 102f
...Ceiling wall, 104...3-phase - spiral insulation spacer,
105... Insulating spacer, 135... Reinforcement plate, BS
... Overhead line lead-in bushing (track lead-in means),
DSl...Line side disconnector, DS2...Bus bar side disconnector, DS3...Transformer primary side disconnector, ESl...Line side grounding RLL switch, ES2, EES3...Breaker inspection Earthing switch for ES4...Transformer P! ! Primary side grounding opener, CB...breaker, LA...surge arrester, B...
Bushing for variable voltage mixed connection.

Claims (5)

[Claims] (1) A line lead-in means, a line-side disconnector whose one end is connected to the line-side disconnector, a circuit breaker whose one end is connected to the other end of the line-side disconnector, a busbar, and other parts of the circuit breaker. A bus-side disconnector having one end connected to the busbar and the other end connected to the busbar, and a transformer primary-side disconnector having one end connected to the busbar and the other end connected to the primary side of the transformer. Three phases are housed all at once in a cubicle-shaped container filled with insulating gas, and each disconnector has a movable contact and a fixed contact supported on the disconnector base via an insulating support. In a cubicle type gas insulated switchgear having a structure in which the line leads in and out of the direction opposite to each other, the line lead-in means is attached to one end side in the longitudinal direction of the cubicle type container, and the line side disconnector is arranged in the line lead in. The circuit breaker is disposed at a position closer to the other end of the container than the means and is supported on the ceiling wall of the container with its axis directed in the longitudinal direction of the container, and the circuit breaker is located below the line-side disconnector. reinforcement, which is disposed on the bottom wall of the container and is supported in an upright state, and has a plate surface perpendicular to the longitudinal direction of the container at a lower position closer to the other end of the container than the circuit breaker; a plate is arranged, the reinforcing plate is joined to a bottom wall of the container and a side wall opposite in the width direction of the container, and the busbar side disconnector is attached to a surface of the reinforcing plate on the circuit breaker side,
Further, the transformer primary side disconnecting switch is installed on the opposite side of the reinforcing plate from the circuit breaker with each axis oriented in the vertical direction, and the three-phase busbars are arranged in a triangular manner above the reinforcing plate. A cubicle type gas insulated switchgear, characterized in that the cubicle type gas insulated switchgear is attached to a side wall of the container via an insulating support means. (2) The cubicle-type gas insulated switchgear according to claim 1, wherein the line lead-in means is a bushing for drawing in overhead lines, and is attached to the ceiling wall of the container. (3) The line lead-in means is a bushing for drawing in overhead wires, and is attached to an end wall at one end in the longitudinal direction of the container in a state that projects obliquely upward from the end wall. A cubicle-type gas insulated switchgear according to scope 1. (4) The line lead-in means is a cable head,
Claim 1 attached to the bottom wall of the container
The cubicle-type gas-insulated switchgear described in . (5) Claims 1 to 4, wherein each of the disconnectors is a disconnector equipped with a grounding switch that grounds at least one of its fixed contact and movable contact. The cubicle-shaped gas insulated switchgear according to any one of the above.