JPH0865836A - Gas-insulated switchgear - Google Patents

Abstract

PURPOSE: To reduce sharply a storage capacity of a building or an underground chamber and thereby to reduce the cost of construction sharply by reducing the installation space of a gas insulated switchgear of a stacked disposition type. CONSTITUTION: In a gas-insulated switchgear disposed on a lower stage, a cable terminal part 7b thereof is fitted in a vertically reverse direction to a cable terminal part 7a of the gas-insulated switchgear disposed on the upper stage. Besides, a power cable laying chamber 12, which is usually provided on the lower sides of floor surfaces of the upper and lower stages separately, is provided in only one between the upper and lower stages, and a power cable 8b for the lower stage is also led out from above the gas-insulated switchgear on the lower stage through the power cable laying chamber 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear in which a plurality of gas-insulated switchgear for each line are installed in a horizontal direction and further stacked in two layers vertically.

[0002]

2. Description of the Related Art In substations or switchyards installed in the vicinity of a large city or a seaside area, the electrical equipment that composes the substation or switchyard must be
A gas-insulated switchgear is used which is hermetically sealed with an insulating medium such as F ₆ gas having excellent insulating properties and arc extinguishing properties. This type of gas-insulated switchgear has three-dimensionally arranged circuit breakers, disconnectors, and other required equipment to narrow the space between each equipment and to significantly reduce the site area.
The switch can be made significantly smaller than the air-insulated switchgear.

Further, in recent years, considering the harmony of nature and the environment with houses, there is a tendency that the number of constructions in buildings and underground rooms in large cities is increasing. Therefore, arranging the components reasonably,
In order to minimize the installation area or installation volume, a gas-insulated switchgear has been developed in which the components are arranged in multiple layers.

FIG. 21 and FIG. 22 show a general structure of the above-mentioned laminated arrangement type gas insulated switchgear. That is, in the gas-insulated switchgear shown in the figure,
To the upper terminal of the circuit breaker 1, a line side device, that is, an instrument current transformer 2, a line side maintenance earthing switch 3 of the circuit breaker 1, a line side disconnecting switch 4 and a line side earthing switch 5 is connected. An instrument transformer 6 is connected to the lower portion, and a cable terminating portion 7a is connected to the horizontally adjacent portion, and a power cable 8a is arranged downward from the cable terminating portion 7a. On the other hand, the lower terminal of the circuit breaker 1 is connected to the busbar-side maintenance earthing switch 9 and the busbar-side disconnector 10 of the circuit breaker 1, and the busbar 11a is arranged in the direction perpendicular to the plane of the drawing in this figure. The devices of one line are configured by these. In addition, with other lines,
They are connected by the bus bar 11a. Further, the gas-insulated switchgear as described above is disposed on the upper floor 20a and the lower floor 20b, respectively, and further below the floors of the respective stages, the power cables 8a, 8b of the respective stages are provided. Laying room 12a,
12b are provided separately.

[0005]

However, as shown in FIG.
In the conventional arrangement of the gas-insulated switchgear shown in Fig. 2, the upper and lower power cable installation chambers 12a and 12b are installed.
However, there is a drawback that the installation volume of the gas-insulated switchgear of each line becomes large and the construction cost of the building or basement for storing the gas insulation switch increases significantly. Further, since the height of the gas-insulated switchgear of each line becomes high, there is a drawback that it lacks stability against an earthquake or the like.

The present invention has been proposed in order to solve the above-mentioned drawbacks of the conventional stacking type gas insulated switchgear, and its object is to reduce the installation volume of the stacking type gas insulated switchgear. The object is to provide a gas-insulated switchgear with a significantly reduced storage capacity of a building or basement and a significant reduction in construction costs by achieving downsizing.

[0007]

According to a first aspect of the present invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further two layers are vertically stacked. In a gas-insulated switchgear provided with a power cable laying chamber as a lead-out portion of the line, the power cable laying chamber is provided between the upper and lower gas-insulated switchgear, and is arranged in the lower stage. The power cable connected to the cable terminal of the gas-insulated switchgear is configured to be drawn into the power cable installation chamber from below.

The invention according to claim 2 is a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is arranged in two layers above and below the line. In a gas-insulated switchgear provided with a power cable laying chamber as a lead-out part, the opposing cable end parts of the gas-insulated switchgear arranged above and below are connected linearly by a power cable. is there.

According to a third aspect of the present invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is arranged in two layers above and below the line. In a gas-insulated switchgear provided with a power cable laying chamber as a pull-out part of the gas-insulated switchgear, the opposed drawing-in end parts of the gas-insulated switchgear arranged above and below are constituted by substantially L-shaped connecting busbars, and gas-insulating between both busbars is performed. It is characterized by being connected by a bus bar.

According to a fourth aspect of the present invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is arranged in two layers above and below the line. In the gas-insulated switchgear equipped with a power cable laying room as the pull-out part, the equipment configuration of the gas-insulated switchgear installed in the upper stage and the gas-insulated switchgear installed in the lower stage shall be symmetrical. It is characterized by.

According to a fifth aspect of the present invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is stacked in two layers, one above the other. In the gas-insulated switchgear equipped with a power cable installation room as the pull-out part, the cable end part of the gas-insulated switchgear arranged in the upper stage is arranged to be displaced from the cable end part arranged in the lower stage in the longitudinal direction of the line. It is a feature.

According to a sixth aspect of the present invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is arranged in two layers vertically. In a gas-insulated switchgear equipped with a power cable laying room as a pull-out part, the applicable system capacity of either one of the gas-insulated switchgear arranged in the upper or lower stage is applied to the gas-insulated switchgear arranged in the other. It is characterized by making it larger than the system capacity.

According to a seventh aspect of the invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is stacked in two layers, one above the other, In the gas-insulated switchgear equipped with a power cable installation room as the pull-out part, the cable terminal part of the gas-insulated switchgear arranged in the upper stage shall be arranged between the adjacent lines of the gas-insulated switchgear arranged in the lower stage. It is a feature.

According to an eighth aspect of the invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is arranged in two layers in the vertical direction. In a gas-insulated switchgear equipped with a power cable laying chamber as a pull-out part, the shared power cable laying chambers are arranged on the sides of the gas-insulated switchgear that are stacked one above the other. The power cable is drawn out horizontally in the same direction from the cable end portion of the gas-insulated switchgear arranged at.

According to a ninth aspect of the present invention, there is provided a gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction, and further, the gas-insulated switchgear is vertically stacked in two stages. In a gas-insulated switchgear provided with a power cable laying room as a pull-out section of the gas-insulated switchgear, a busbar branch part of the gas-insulated switchgear arranged in the upper stage and a busbar branch part arranged in the lower part of at least one set of lines that are end lines. Are arranged at opposite positions, and each busbar branch is connected by a gas-insulated busbar.

According to a tenth aspect of the present invention, in the gas-insulated switchgear according to the first to ninth aspects, the support base for supporting the cable end portion is a support member for other equipment constituting each line. It is characterized in that it is removably attached to the device, and that other devices constituting each line are installed on the line base.

[0017]

According to the first aspect of the present invention, since the power cable installation chambers, which are conventionally provided separately in the upper and lower gas-insulated switchgear, can be shared, the stack-placed gas-insulated switchgear can be used. The installation volume can be reduced.

According to the second aspect of the present invention, since the power cable connects the upper and lower gas-insulated switchgear in a straight line, the power cable can be minimized and the power cable laying room can be shared. The height of can be minimized.

According to the third aspect of the invention, since the gas-insulated busbars linearly connect the L-shaped connection busbars arranged at the ends of the upper and lower gas-insulated switchgear, It can be shortened and the height of the shared power cable installation room can be minimized.

According to the invention as defined in claim 4, the pulling positions of the upper and lower power cables into the power cable laying room are dispersed without being concentrated in one place, so that the cable can be easily installed. In addition, the height of the shared power cable installation room can be reduced.

According to the fifth aspect of the invention, the positions of the upper and lower power cables drawn into the shared power cable installation room are displaced in the longitudinal direction of the line, so that the cable can be easily installed. Further, since the two power cables do not compete with each other, the height of the shared power cable installation room can be reduced.

According to the sixth aspect of the present invention, the positions of the upper and lower power cables drawn into the shared power cable laying chamber are displaced in the longitudinal direction of the line, which facilitates cable installation. Further, since the two power cables do not compete with each other, the height of the shared power cable installation room can be reduced. Further, it becomes a particularly effective means when it becomes necessary to install a gas-insulated switchgear having a large power capacity in either the upper stage or the lower stage due to construction conditions and the like.

According to the seventh aspect of the invention, the positions of the upper and lower power cables drawn into the shared power cable laying chamber are displaced in the bus bar axis direction, so that the cable can be easily installed. Further, since the two power cables do not compete with each other, the height of the shared power cable installation room can be reduced.

According to the eighth aspect of the invention, since the shared power cable installation chambers are arranged at the side portions of the gas-insulated switchgear stacked above and below, the installation height of the equipment is particularly high. It is possible to provide an effective gas-insulated switchgear for locational conditions with limited space.

According to the invention described in claim 9, since the bus bar connecting the units of the gas insulated switchgear can be configured to be the shortest, the installation space can be reduced.

According to the tenth aspect of the present invention, the line base for installing each device constituting the line can be significantly reduced as compared with the conventional type.

[0027]

Embodiments of the present invention will be specifically described below with reference to FIGS. 1 to 20. The same members as those of the conventional type shown in FIGS. 21 and 22 are designated by the same reference numerals, and the description thereof will be omitted.

(1) First Embodiment This embodiment corresponds to the invention described in claim 1. As shown in FIG. 1, the gas-insulated switchgear arranged in the upper stage is the same as the conventional one. In the gas-insulated switchgear arranged in the lower stage, the cable end portion 7b is
Cable end part 7 of the gas insulated switchgear arranged in the upper stage
It is installed in the opposite direction from a. Further, conventionally, only one power cable laying chamber 12 is separately provided on the lower side of each floor of the upper and lower stages, and one power cable laying chamber 12 is provided between the upper stage and the lower stage. It is drawn out from the upper part of the lower gas-insulated switchgear via the power cable installation chamber 12.

In the gas-insulated switchgear of the present embodiment having such a structure, the power cable installation chambers 12 which are conventionally provided separately in the upper and lower gas-insulated switchgear can be shared, so that the high efficiency can be achieved. It is possible to further reduce the dimension in the depth direction, and it is possible to reduce the installation volume of the stacked arrangement type gas insulated switchgear. In addition, since the storage capacity of the building or basement can be greatly reduced, the construction cost can be significantly reduced.

(2) Second Embodiment This embodiment corresponds to the invention described in claim 2, and as shown in FIG. 2, an upper gas insulated switchgear and a lower gas insulated switchgear. And are each formed by a unit configuration. In the gas-insulated switchgear having such a unit structure, a connecting line for connecting the upper unit and the lower unit is installed respectively. These communication lines are connected by the power cable 8 in the shared power cable laying room 12 as in the first embodiment.

In the gas-insulated switchgear of this embodiment having such a configuration, the power cable 8 connects the gas-insulated switchgear of the upper stage and the lower stage in a straight line, and therefore can be made the shortest. As a result, the connection between the units can be simplified, and the height of the shared power cable laying chamber 12 can be minimized, so that the installation volume of the stacking type gas insulated switchgear can be reduced. it can. Also,
Since the storage capacity of the building or basement can be significantly reduced, the construction cost can be significantly reduced.

(3) Third Embodiment This embodiment corresponds to the invention described in claim 3, and as shown in FIG. 3, the cable terminating portions 7a and 7b which have been conventionally used are Instead, the L-shaped connecting bus bar 13a
And 13b are provided, and the L-shaped connecting busbar 13 is provided.
A gas-insulated busbar 14 is provided between a and 13b instead of the conventionally used power cable 8.

In the gas-insulated switchgear of the present embodiment having such a configuration, the gas-insulated busbar 14 has L-shaped connection busbars 13a and 13b arranged at the end portions of the upper and lower gas-insulated switchgear. Since the spaces are connected linearly, the length can be minimized. As a result, the height of the shared power cable laying chamber 12 can be minimized, so that the installation volume of the stacking type gas insulated switchgear can be reduced. In addition, since the storage capacity of the building or basement can be greatly reduced, the construction cost can be significantly reduced.

(4) Fourth Embodiment This embodiment corresponds to the invention described in claim 4, and as shown in FIG. 4, the gas-insulated switchgear installed on the upper stage and the gas insulated switchgear installed on the lower stage. The arrangement of the equipment of the gas insulated switchgear is substantially symmetrical. Further, the position where the upper power cable 8a is pulled into the power cable laying chamber 12 and the position where the lower power cable 8b is pulled into the power cable laying chamber 12 are near the ends of the power cable laying chamber 12, respectively. Is configured.

In the gas-insulated switchgear of the present embodiment having such a structure, the positions at which the upper and lower power cables 8a and 8b are drawn into the power cable laying chamber 12 are dispersed without being concentrated in one place. Therefore, the cable can be easily installed. In addition, the shared power cable installation room 1
Since the height of 2 can also be made small, the installation volume of the stacking type gas insulated switchgear can be reduced. Further, since the storage capacity of the building or basement can be significantly reduced, the construction cost can be significantly reduced.

(5) Fifth Embodiment This embodiment corresponds to the invention described in claim 5, and as shown in FIGS. 5 to 7, the upper and lower gas-insulated switchgear are the same. The gas-insulated switchgear of the upper stage is arranged so as to be displaced from the gas-insulated switchgear of the lower stage in the line direction (rightward direction in the drawing). That is,
The cable terminating portion 7a on the upper stage is replaced by the cable terminating portion 7 on the lower stage.
It is arranged so as to be displaced from b in the longitudinal direction of the line. Also,
Unlike the first to fourth embodiments, the upper and lower power cable installation chambers 12 are provided below the lower gas-insulated switchgear.

In the gas-insulated switchgear of this embodiment having such a structure, the positions of the upper and lower power cables 8a, 8b drawn into the shared power cable installation chamber 12 are displaced in the longitudinal direction of the line. , Cable installation becomes easy. Further, since the two power cables 8a and 8b do not compete with each other, the shared power cable installation room 12
The height can be also reduced, and the installation volume of the stack type gas-insulated switchgear can be reduced. Further, since the storage capacity of the building or basement can be significantly reduced, the construction cost can be significantly reduced.

(6) Sixth Embodiment This embodiment corresponds to the invention described in claim 6, and as shown in FIGS. 8 to 10, the upper stage is a gas-insulated switch with a large power capacity. A device is disposed, and a gas-insulated switchgear having a small power capacity is disposed in the lower stage. The upper and lower power cable installation chambers 12 are provided below the lower gas-insulated switchgear, as in the fifth embodiment. Furthermore, the upper and lower power cables 8a, 8b
The position where the power cable is pulled into the power cable installation room 12 is configured to be displaced in the longitudinal direction of the line.

In the gas-insulated switchgear of this embodiment having such a configuration, the positions of the upper and lower power cables 8a, 8b drawn into the shared power cable installation chamber 12 are displaced in the longitudinal direction of the line, Will be easier to construct. Further, since the two power cables 8a and 8b do not compete with each other, the height of the shared power cable laying chamber 12 can be reduced, and the installation volume of the stacked gas insulated switchgear can be reduced. You can further,
Since the storage capacity of the building or basement can be significantly reduced, the construction cost can be significantly reduced.

In the present embodiment, it is also possible to reverse the vertical relationship. That is, as shown in FIGS. 18 to 20, the power cable laying chamber 12 is provided on the upper side of the upper gas-insulated switchgear, and from the cable end portions 7a and 7b of the gas-insulated switchgear arranged in the upper and lower stages, Power cable 8
It is also possible to draw a and 8b upward. Such a configuration is a particularly effective means when it becomes necessary to install a gas-insulated switchgear having a large power capacity in the lower stage due to building conditions and the like.

(7) Seventh Embodiment This embodiment corresponds to the invention described in claim 7, and as shown in FIGS. 11 to 13, the upper and lower gas-insulated switchgears are the same. The upper stage gas-insulated switchgear is displaced in the bus axis direction (perpendicular to the plane of the drawing), and the upper stage power cable 8a passes between adjacent lines of the lower stage gas-insulated switchgear, and the lower stage gas-insulated switchgear It is configured to be drawn into the power cable laying chamber 12 provided in the lower part of the. The upper and lower power cable installation chambers 12 are shared and provided under the lower gas-insulated switchgear as in the fifth embodiment.

In the gas-insulated switchgear of this embodiment having such a configuration, the positions of the upper and lower power cables 8a and 8b drawn into the shared power cable installation chamber 12 are displaced in the bus axis direction. Therefore, the cable can be easily installed. Further, since the two power cables 8a and 8b do not compete with each other, the shared power cable installation room 12
The height can be also reduced, and the installation volume of the stack type gas-insulated switchgear can be reduced. Further, since the storage capacity of the building or basement can be significantly reduced, the construction cost can be significantly reduced.

(8) Eighth Embodiment This embodiment corresponds to the invention described in claim 8, and as shown in FIGS. 14 and 15, the shared power cable laying chamber 12 is provided. , Are arranged on the sides of the gas-insulated switchgear stacked one above the other. At the ends of the upper and lower gas-insulated switchgear, power cables 8
Cable end portions 7a and 7b are arranged so that a and 8b can be pulled out in the horizontal direction.

In the gas-insulated switchgear of this embodiment having such a structure, the shared power cable installation chambers 12 are arranged on the side portions of the gas-insulated switchgear which are vertically stacked. In particular, it is possible to provide an effective gas-insulated switchgear for site conditions where the installation height of equipment is restricted.

(9) Ninth Embodiment This embodiment corresponds to the invention described in claim 9 and is an improvement in at least one set of lines which are end lines. That is, as shown in FIG. 16, in the gas-insulated switchgear arranged in the lower stage, the lower side terminal of the circuit breaker 1 is used for maintenance of the line side equipment, that is, the current transformer 2 for the instrument and the circuit side of the circuit breaker 1. The earthing switch 3, the line-side disconnecting switch 4 and the line-side earthing switch 5 are connected, and an instrument transformer 6 is provided above the earthing switch 3.
A cable end portion 7b is connected to the horizontally adjacent portion, and a power cable 8b is pulled out upward from the cable end portion 7b. Further, a bus bar side device, that is, a bus bar side maintenance earthing switch 9 and a bus bar side disconnector 10 are connected to the upper terminal of the circuit breaker 1. Further, the busbar 11b connected to the upper terminal of the circuit breaker 1 has a branch portion 15 vertically upward.
b is formed.

On the other hand, in the line of the gas-insulated switchgear arranged in the upper stage opposite to this line, the busbar 11a connected to the lower terminal of the circuit breaker 1 has a branch portion 1 vertically downward.
5a is formed and is arranged at a position facing the branch portion 15b. And these branch parts 15a and 15b
Are connected by a bus bar 16. The power cable laying chamber 12 is provided between the upper and lower stages.

In the gas-insulated switchgear of this embodiment having such a structure, the bus bar connecting the units of the gas-insulated switchgear can be constructed to have the shortest length, so that the installation space can be reduced. . Also, because the storage capacity of the building or basement can be significantly reduced,
Construction costs can be significantly reduced.

(10) Tenth Embodiment This embodiment corresponds to the invention described in claim 10, and as shown in FIG. 17, a cable terminating portion support frame 17 for supporting the cable terminating portion 7a. However, a supporting member for another device that constitutes a line, for example, a support base 1 for a transformer 6 for an instrument.
8 is removably attached by bolt fastening or the like. In addition, each device that constitutes a line has a line base 19
It is installed on top. The configuration of the other parts is similar to that of the first embodiment shown in FIG.

In the gas-insulated switchgear of the present embodiment having such a configuration, the line base 19 for installing each device constituting the line can be greatly reduced compared to the conventional type. That is, since the support base 17 of the cable terminating portion 7a is not installed on the line base 19, the size of the line base 19 can be reduced accordingly.
As a result, when the gas-insulated switchgear is carried in, the cable end portion 7a can be separated from other devices,
It is possible to carry in from a smaller carry-in port, and it is also possible to reduce the installation size. The line base 19 can be made even smaller by disposing the control panel 20 of the gas insulated switchgear independently of the line base 19.

[0050]

As described above, according to the present invention, it is possible to reduce the size mainly in the height direction of a gas-insulated switchgear that is stacked and arranged in two upper and lower stages, and a gas-insulated switchgear of a stacking type is provided. It is possible to provide a gas-insulated switchgear whose installation volume is reduced, the storage volume of a building or basement is also significantly reduced, and the construction cost is significantly reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a gas-insulated switchgear according to the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of the gas insulated switchgear of the present invention.

FIG. 3 is a schematic configuration diagram showing a third embodiment of the gas-insulated switchgear of the present invention.

FIG. 4 is a schematic configuration diagram showing a fourth embodiment of the gas insulated switchgear of the present invention.

FIG. 5 is a schematic configuration diagram showing a fifth embodiment of the gas-insulated switchgear of the present invention.

FIG. 6 is a view on arrow CC of FIG.

FIG. 7 is a view on arrow DD of FIG.

FIG. 8 is a schematic configuration diagram showing a sixth embodiment of the gas insulated switchgear of the present invention.

9 is a view taken along the line EE of FIG.

FIG. 10 is a view on arrow FF in FIG.

FIG. 11 is a schematic configuration diagram showing a seventh embodiment of the gas insulated switchgear of the present invention.

FIG. 12 is a view taken along the line GG in FIG.

FIG. 13 is a view on arrow H-H in FIG.

FIG. 14 is a schematic configuration diagram showing an eighth embodiment of the gas insulated switchgear of the present invention.

FIG. 15 is a view on arrow I-I of FIG.

FIG. 16 is a schematic configuration diagram showing a ninth embodiment of the gas-insulated switchgear of the present invention.

FIG. 17 is a schematic configuration diagram showing a tenth embodiment of the gas insulated switchgear of the present invention.

FIG. 18 is a schematic configuration diagram showing a modified example of the sixth embodiment of the gas insulated switchgear of the present invention.

FIG. 19 is a view taken along the line JJ of FIG.

20 is a view as seen from the arrow KK of FIG.

FIG. 21 is a schematic configuration diagram of a conventional gas-insulated switchgear.

22 is a view on arrow AA and a view on arrow BB in FIG. 21.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Circuit breaker 2 ... Current transformer for instrument 3 ... Grounding switch for line side maintenance 4 ... Line side disconnecting switch 5 ... Line side grounding switch 6 ... Transformer for instrument 7a, 7b ... Cable end part 8a, 8b ... Power cable 9 ... Bus side maintenance earthing switch 10 ... Bus side disconnecting switch 11a, 11b ... Bus 12 ... Power cable laying room 13a, 13b ... L-type bus 14 ... Bus 15a, 15b ... Bus branching section 16 ... Bus 17 ... Cable end part support stand 18 ... Instrument transformer support stand 19 ... Line base 20 ... Control panel

Claims (10)

[Claims] 1. A gas-insulated switchgear in which a plurality of gas-insulated switchgear for each line are installed in a horizontal direction and further stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. In a gas-insulated switchgear provided with a laying chamber, the power cable laying chamber is provided between the upper and lower gas-insulated switchgear, and is connected to the cable end of the gas-insulated switchgear arranged in the lower tier. The cable
A gas-insulated switchgear configured to be drawn into the power cable installation chamber from below. 2. A gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction and further stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. A gas-insulated switchgear provided with a laying chamber, characterized in that the opposing cable ends of the gas-insulated switchgear arranged above and below are connected linearly by a power cable. 3. A gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction and further stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. In a gas-insulated switchgear provided with a laying chamber, the opposite end ends of the gas-insulated switchgear arranged above and below are configured by substantially L-shaped connecting busbars, and both busbars are connected by gas-insulating busbars. And gas insulated switchgear. 4. A gas-insulated switchgear in which a plurality of gas-insulated switchgear for each line are installed in a horizontal direction and further stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. In a gas-insulated switchgear with a laying room, the gas-insulated switchgear installed in the upper stage and the gas-insulated switchgear installed in the lower stage are arranged symmetrically to each other. apparatus. 5. A gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction and further stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. In a gas-insulated switchgear with a laying room, the cable end of the gas-insulated switchgear placed in the upper stage
A gas-insulated switchgear characterized in that it is arranged so as to be displaced in the longitudinal direction of the line from the cable terminating portion arranged in the lower stage. 6. A gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed in a horizontal direction and further stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. In a gas-insulated switchgear equipped with a laying room, the applicable system capacity of either the upper or lower gas-insulated switchgear shall be greater than the applicable system capacity of the gas-insulated switchgear located in the other. Characteristic gas-insulated switchgear. 7. A gas-insulated switchgear in which a plurality of gas-insulated switchgear for each line are installed in a horizontal direction and further stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. In a gas-insulated switchgear with a laying room, the cable end of the gas-insulated switchgear placed in the upper stage
A gas-insulated switchgear arranged between adjacent lines of a gas-insulated switchgear arranged in a lower stage. 8. A gas-insulated switchgear in which a plurality of gas-insulated switchgear for each line are installed horizontally, and further, the gas-insulated switchgear is stacked in two layers, the power cable serving as a lead-out portion of the line to the outside. In a gas-insulated switchgear equipped with a laying chamber, the shared power cable laying chambers are arranged on the sides of the gas-insulated switchgear that are stacked one above the other, and also in the upper and lower stages A gas-insulated switchgear characterized in that the power cable is drawn out horizontally in the same direction from the cable end of the. 9. A gas-insulated switchgear in which a plurality of gas-insulated switchgear of each line are installed horizontally, and further stacked vertically in two stages, and a power cable is used as a lead-out portion of the line to the outside. In a gas-insulated switchgear provided with a laying room, in at least one set of lines that are end lines, the busbar branch part of the gas-insulated switchgear arranged in the upper stage and the busbar branch part arranged in the lower part are arranged at opposite positions, A gas-insulated switchgear characterized in that each busbar branch is connected by a gas-insulated busbar. 10. A support frame for supporting the cable terminating portion is detachably attached to a support member of another device forming each line, and another device forming each line is installed on a line base. Claim 1 characterized by the above.
The gas-insulated switchgear according to claim 9.