JP5546425B2 - Gas insulated switchgear - Google Patents

Description

  The present invention relates to a gas insulated switchgear used in an electric station such as a substation.

In an electric station such as a substation and a power station, a gas insulated switchgear that detects an accident current and interrupts the current is used. For example, as shown in Patent Document 1, a gas insulated switchgear includes a switchgear and a bus bar in a metal container filled and sealed with an arc extinguishing gas such as SF ₆ (sulfur hexafluoride) excellent in insulation performance and arc extinguishing performance. It is configured by arranging necessary equipment such as a current transformer and a disconnect switch. In such a gas insulated switchgear, it is desired to reduce the installation area of the gas insulated switchgear in order to reduce the cost.

JP-A-8-79922

  In the gas insulated switchgear as described above, an operating device for operating the disconnector is provided. However, there is a problem that the reduction of the installation area of the gas insulated switchgear is limited by the maintenance space secured for each operation device for operating the operation device.

  The present invention has been made in view of the above, and an object of the present invention is to provide a gas-insulated switchgear that can reduce the installation area while ensuring a maintenance space for the operating device.

  In order to solve the above-described problems and achieve the object, the present invention provides a gas insulated switchgear in which a plurality of circuit breakers are connected to a bus and a circuit breaker unit having a disconnecting device is connected to each circuit breaker. A first operating device that is disposed on a side of the disconnector and operates the disconnector, and the first operating device is approximately 180 degrees around the axis of the disconnector between adjacent breaker units. It is characterized by being arranged.

  According to this invention, there is an effect that the installation area can be reduced while securing the maintenance space of the operating device by allowing the first operating devices to face each other and sharing the maintenance space.

FIG. 1 is a plan view illustrating an example of an arrangement configuration of the gas insulated switchgear according to the first embodiment. FIG. 2 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line AA shown in FIG. FIG. 3 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line BB shown in FIG. FIG. 4 is a single-line connection diagram of the present embodiment. FIG. 5 is a plan view showing an arrangement configuration of a gas insulated switchgear as a comparative example. FIG. 6 is a side view of the gas insulated switchgear shown in FIG. FIG. 7 is a plan view showing an example of the arrangement configuration of the gas-insulated switchgear according to the modification of the first embodiment. FIG. 8 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line A2-A2 shown in FIG. FIG. 9 is a cross-sectional view showing the configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line B2-B2 shown in FIG. FIG. 10 is a plan view illustrating an example of an arrangement configuration of the gas-insulated switchgear according to the second embodiment. FIG. 11 is a cross-sectional view showing the configuration of the unit (I) which is a structural unit of the gas insulated switchgear, and is a view taken along the line CC shown in FIG. FIG. 12 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line DD shown in FIG. FIG. 13 is a plan view illustrating an example of an arrangement configuration of the gas-insulated switchgear according to the third embodiment. FIG. 14 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is an arrow view along the line EE shown in FIG. 15 is a cross-sectional view showing the configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line FF shown in FIG. FIG. 16 is a plan view illustrating an example of an arrangement configuration of a gas-insulated switchgear according to a modification of the third embodiment. FIG. 17 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line E2-E2 shown in FIG. 18 is a cross-sectional view showing the configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line F2-F2 shown in FIG. FIG. 19 is a plan view showing an example of the arrangement configuration of the gas-insulated switchgear according to the fourth embodiment. FIG. 20 is a cross-sectional view showing the configuration of the unit (I) which is a structural unit of the gas insulated switchgear, and is a view taken along the line GG shown in FIG. FIG. 21 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line HH shown in FIG. FIG. 22 is a plan view illustrating an example of an arrangement configuration of a gas insulated switchgear according to a modification of the fourth embodiment. FIG. 23 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line G2-G2 shown in FIG. 24 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line H2-H2 shown in FIG.

  Below, the gas insulated switchgear concerning an embodiment of the invention is explained in detail based on a drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a plan view illustrating an example of an arrangement configuration of the gas insulated switchgear according to the first embodiment. FIG. 2 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line AA shown in FIG. FIG. 3 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line BB shown in FIG. FIG. 4 is a single-line connection diagram of the present embodiment.

  First, the configuration of the units (I) and (II), which are the structural units of the gas insulated switchgear, will be described in detail, and then the overall layout will be described. Unit (I) and unit (II) are alternately connected in parallel to the two connection buses 28 and 29.

First, the configuration of the unit (I) will be described. As shown in FIG. 2, a cylindrical circuit breaker 1 is erected with its axis perpendicular to the installation surface 100. That is, the circuit breaker 1 is a vertical circuit breaker, and a circuit breaker (not shown) is provided in the interior filled with an insulating arc-extinguishing gas such as SF ₆ .

  On the side surface of the circuit breaker 1, branch outlets 2 a, 2 b, 2 c that branch horizontally are provided. An instrument current transformer 4 is provided at the branch outlet 2a, and a disconnect unit 5 is connected in series. In the following description, an axis parallel to the drawing direction of the branch outlet 2a is defined as an X axis, a horizontal axis perpendicular to the X axis is defined as a Y axis, and an vertical axis perpendicular to the X axis is defined as a Z axis.

  The disconnecting unit 5 includes a disconnecting switch 51 with a circuit breaker inspection grounding switch and a line side grounding switch 52. The disconnect unit 5 is provided so that the axis P of the disconnect device 51 is substantially horizontal. In the disconnect unit 5, the disconnect device 51 and the line-side ground switch 52 are connected in series in this order from the current transformer 4 side.

  The branch lead-out ports 2b and 2c are provided below the branch lead-out port 2a, and the lead-out direction is a direction opposite to the pull-out direction of the branch lead-out port 2a (a negative direction parallel to the X axis). A connection bus 28 is connected to the branch lead-out port 2b, and a connection bus 29 is connected to the branch lead-out port 2c.

  On the side of the disconnecting unit 5 (disconnector 51), a first operating device 7 for operating the disconnector 51 is arranged. More specifically, it is arranged at a position on the negative direction side parallel to the Y axis with respect to the disconnecting unit 5.

  Further, a second operating device 8 for operating the track side ground switch 52 is arranged at a position different from the arrangement of the first operating device 7 by about 90 degrees around the axis P of the disconnector 51. Yes. More specifically, in the unit (I), the second operating device 8 is disposed at a position that is above (the positive direction side parallel to the Z axis) with respect to the disconnecting unit 5 (line-side ground switch 52). Has been.

  A cable head 13 is provided on the support frame 12 so as to face the circuit breaker 1 with the disconnect unit 5 interposed therebetween. The cable head 13 is connected to the disconnecting unit 5. An instrument transformer 15 is provided above the cable head 13.

  As described above, in the unit (I), the vertical circuit breaker 1 provided with the branch outlets 2a, 2b, and 2c, the current transformer 4 for the instrument, and the disconnecting unit having the disconnecting switch 51 and the line-side ground switch 52. 5 constitutes a circuit breaker unit. Then, line-side devices such as the cable head 13 and the instrument transformer 15 are connected so as to face each other with the circuit breaker unit and the disconnecting unit 5 interposed therebetween.

  Next, the configuration of the unit (II) will be described. As shown in FIGS. 1 and 3, the configuration of the unit (II) is substantially the same as that of the unit (I), and the arrangement of the first operating device 7 and the arrangement of the second operating device 8 are different.

  The first operating device 7 is arranged in a direction different from the first operating device 7 in the adjacent unit (I) by about 180 degrees around the axis P of the disconnector 51. That is, the first operating device 7 in the unit (II) is disposed at a position on the side of the disconnecting unit 5 (disconnector 51) and on the positive direction side parallel to the Y axis with respect to the disconnecting unit 5. Is done.

  Similarly to the unit (I), the second operating device 8 is arranged around the axis P of the disconnector 51 at a position that is approximately 90 degrees different from the arrangement of the first operating device 7. However, in the unit (II), the second operating device 8 in the adjacent unit (I) is arranged in a direction different by about 180 degrees around the axis P of the disconnector 51. That is, the second operating device 8 in the unit (II) is disposed below the disconnecting unit 5 (disconnector 51) (in the negative direction parallel to the Z axis).

  The arrangement of the first operating device 7 and the second operating device 8 in the unit (II) as described above is such that the disconnecting unit 5 is the same as the disconnecting unit 5 used for the unit (I), and the axis P is the same as the unit (I). It can be realized by using it around 180 degrees around. That is, the arrangement of the disconnecting unit 5 is different between the unit (II) and the unit (I).

  Next, the single line connection diagram of this Embodiment is demonstrated. As shown in FIG. 4, the unit (I) and the unit (II) described above are arranged in parallel and are alternately connected to the connection buses 28 and 29. In FIG. 4, CB is a circuit breaker, DS / ES is a disconnect switch having a ground switch, DS is a disconnect switch having no ground switch, CT is a current transformer for the instrument, VT is a transformer for the instrument, and FES is The track side earthing switch is shown. In addition, about the component demonstrated by the above-mentioned unit (I) and unit (II), the code | symbol is also shown collectively in FIG.

  Next, in the gas insulated switchgear in which a plurality of circuit breaker units are arranged in parallel, a maintenance space necessary between the circuit breaker units, particularly a maintenance space necessary for operating the first operating device 7 will be described.

  FIG. 5 is a plan view showing an arrangement configuration of a gas insulated switchgear as a comparative example. FIG. 6 is a side view of the gas insulated switchgear shown in FIG. As shown in FIG. 5, in the units connected to the buses 128 and 129, when the operation device 107 for operating the disconnector is arranged in the same direction, maintenance is performed for each unit to operate the operation device 107. Space α is required.

Here, the distance b ₀ between the centers of both ends of the three units arranged in parallel is represented by b ₀ = 2L ₁ , where L ₁ is a distance between adjacent unit centers (hereinafter referred to as inter-unit distance). Become. Here, the inter-unit distance L ₁ is defined as a distance from the center of the disconnecting unit 105 to the side surface being β, and a distance from the side surface of the disconnecting unit 105 to the most projecting portion of the operating device 107 is γ. In order to secure the space α, L ₁ = α + 2β + γ.

On the other hand, in the gas insulated switchgear according to the first embodiment, the distance b ₁ between the centers of the unit at both ends of the three units in parallel, the unit of the unit (II) units and (II-I) When the inter-distance is L ₃ and the inter-unit distance between the unit (II-I) and the unit (I-II) is L ₂ , b ₁ = L ₂ + L ₃ is satisfied.

Here, when obtaining the unit interval L ₂ as in the comparative example, since each other first operating device 7 is facing, the maintenance space α of the first operating device 7, the unit (II-I) It can be shared with the unit (I-II). Therefore, L ₂ = α + 2β + 2γ = L ₁ + γ. Also, the unit distance L _3, since maintenance space α of the first operating device 7 is not necessary, it is possible to minimize the interval ε of the circuit breaker 101 with each other as shown in the comparative example of FIG. That is, the inter-unit distance L ₃ is L ₃ = L ₁ −ε.

Therefore, the distance b ₁ is b ₁ = L ₂ + L ₃ = L ₁ + γ + L ₁ −ε = 2L ₁ + γ−ε. When the first operating device 7 protrudes laterally from the side surface of the circuit breaker 1, γ <ε is satisfied in order to secure the maintenance space α, and therefore b ₁ <b ₀ is satisfied.

  As described above, in the present embodiment, the arrangement of the first controller 7 is changed by approximately 180 degrees around the axis P of the disconnector 51 between adjacent units. The dimension in the Y-axis direction of the gas insulated switchgear can be reduced while securing the maintenance space α. Thereby, the installation area of a gas insulated switchgear can be reduced.

  In addition, as described above, the arrangement of the second controller 8 is different by approximately 180 degrees around the axis P of the disconnector 51 between adjacent units, so the arrangement of the first controller 7 is different. The same disconnect unit 5 can be used for the unit (I) and the unit (II). Therefore, it is not necessary to prepare a plurality of types of disconnecting units 5 in accordance with the arrangement of the first operating device 7, so that the number of parts can be reduced and the manufacturing cost can be reduced.

  In the first embodiment, the disconnecting switch 51 and the line-side ground switch 52 are unitized as the disconnecting unit 5, but they may be provided separately without being unitized.

  Further, the circuit breaker 1 has been described with reference to a so-called double bus type in which two connection buses 28 and 29 are connected, but the circuit breaker 1 is not limited thereto. For example, one connecting bus may be connected, and various connecting bus routes may be employed. That is, in the case of a gas insulated switchgear in which a plurality of circuit breaker units are arranged in parallel with the axis P of the disconnector 51 parallel, the configuration described in the first embodiment is applied to the arrangement of the first operating device 7. By doing so, the installation area can be reduced.

  FIG. 7 is a plan view showing an example of the arrangement configuration of the gas-insulated switchgear according to the modification of the first embodiment. FIG. 8 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line A2-A2 shown in FIG. FIG. 9 is a cross-sectional view showing the configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line B2-B2 shown in FIG.

  In this modification, the gas insulated switchgear is configured by using a horizontal circuit breaker 1 in which branch outlets 2a and 2b branch vertically. The disconnecting unit 5 is provided so that the wiring is routed from the branch outlet 2a branched vertically, and the axis P of the disconnector 51 is substantially horizontal.

Further, the adjacent units, that is, the units (I) and (II), the arrangement of the first operating device 7 is varied by about 180 degrees around the axis P of the disconnector 51. Thus, even when the horizontal circuit breaker 1 is used, the arrangement of the first operating device 7 is made to differ by about 180 degrees around the axis P of the disconnector 51 between adjacent units. Similarly, b ₁ <b ₀ (see also FIG. 5).

  Therefore, it is possible to reduce the size of the gas insulated switchgear in the Y-axis direction while ensuring the maintenance space α of the first operating device 7. Thereby, the installation area of a gas insulated switchgear can be reduced.

  Further, the arrangement of the second controller 8 is made to differ by approximately 180 degrees around the axis P of the disconnector 51 between adjacent units. Thereby, even when the horizontal breaker 1 is used, the same disconnecting unit 5 can be used in the unit (I) and the unit (II), the number of parts can be reduced, and the manufacturing cost can be reduced. Can contribute.

  Thus, when the disconnector 51 is adjacently arranged, the arrangement of the gas-insulated switchgear is changed by changing the arrangement of the first operating device 7 and the second operating device 8 about 180 degrees around the axis P. Even if the configuration is different from that described above, the installation area can be reduced and the manufacturing cost can be reduced.

Embodiment 2. FIG.
FIG. 10 is a plan view illustrating an example of an arrangement configuration of the gas-insulated switchgear according to the second embodiment. FIG. 11 is a cross-sectional view showing the configuration of the unit (I) which is a structural unit of the gas insulated switchgear, and is a view taken along the line CC shown in FIG. FIG. 12 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line DD shown in FIG. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the second embodiment, adjacent units are configured by shifting the first operating device 7 in the drawing direction of the branch drawing port 2a (positive direction parallel to the X axis). More specifically, the unit (I) is provided with a spacer 9 between the instrument current transformer 4 and the disconnecting unit 5. That is, the position of the first operating device 7 is shifted by the interval of the spacer 9 between the unit (I) and the unit (II).

With the above configuration, the maintenance space α of the first operating device 7 is the distance between the side surface of the disconnecting unit 5 and the first operating device 7, and the unit (II-I) and unit (I-II) are units. The inter-unit distance L ₄ can be made smaller than the inter-unit distance L ₂ shown in the first embodiment by γ. That is, the inter-unit distance L ₄ is L ₄ = L ₂ −γ = α + 2β + γ = L ₁ .

Then, the inter-unit distance L ₃ between the unit (II) and the unit (II-I) is L ₃ = L ₁ −ε, as in the first embodiment. Accordingly, the distance b ₂ between the centers of the two adjacent units among the three adjacent units is b ₂ = L ₁ + L ₃ = 2L ₁ −ε = b ₀ −ε. Also, b ₂ = b ₀ −ε = b ₁ −γ is also replaced.

Here, as described above, since γ <ε, b ₂ <b ₁ <b ₀ is satisfied. Therefore, according to the configuration of the second embodiment, it is possible to further reduce the dimension of the gas insulated switchgear in the Y-axis direction while ensuring the maintenance space α of the first operating device 7. Thereby, the installation area of the gas insulated switchgear can be further reduced.

  Moreover, the same disconnection unit 5 can be used by unit (I) and unit (II) similarly to the said Embodiment 1. FIG. Thereby, reduction of a number of parts can be aimed at and it can contribute to suppression of manufacturing cost.

  In the second embodiment, the disconnecting switch 51 and the line-side ground switch 52 are unitized as the disconnecting unit 5, but they may be provided separately without being unitized.

  Further, the circuit breaker 1 has been described with reference to a so-called double bus type in which two connection buses 28 and 29 are connected, but the circuit breaker 1 is not limited thereto. For example, one connecting bus may be connected, and various connecting bus routes may be employed. That is, in the case of a gas insulated switchgear in which a plurality of circuit breaker units are arranged in parallel with the axis P of the disconnector 51 parallel, the configuration described in the second embodiment is applied to the arrangement of the first operating device 7. By doing so, the installation area can be reduced.

Embodiment 3 FIG.
FIG. 13 is a plan view illustrating an example of an arrangement configuration of the gas-insulated switchgear according to the third embodiment. FIG. 14 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is an arrow view along the line EE shown in FIG. 15 is a cross-sectional view showing the configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line FF shown in FIG. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. Further, in FIG. 13, the illustration of the instrument transformer 15 is omitted.

  In the third embodiment, the disconnecting unit 5 is arranged such that the axis P of the disconnecting device 51 is substantially vertical (substantially perpendicular to the installation surface 100). The adjacent units differ by about 90 degrees around the axis P from the direction in which the branch outlet 2a is pulled out (the positive direction parallel to the X axis, the direction in which the first operating device 7 is disposed with respect to the axis P). Direction) and the axis P of the disconnector 51 is shifted. More specifically, the unit (I) is provided with a spacer 9 between the instrument current transformer 4 and the disconnecting unit 5. That is, in the unit (I) and the unit (II), the axis P is shifted in the drawing direction of the branch drawing port 2a by the interval of the spacer 9.

With the above configuration, the maintenance space α of the first operating device 7 becomes the distance between the side surface of the disconnecting unit 5 and the first operating device 7 as in the second embodiment, and the unit (II-I) and the unit The inter-unit distance L ₄ with (I-II) can be made smaller by γ than the inter-unit distance L ₂ shown in the first embodiment. That is, the inter-unit distance L ₄ is L ₄ = L ₂ −γ = α + 2β + γ = L ₁ .

Then, the inter-unit distance L ₃ between the unit (II) and the unit (II-I) is L ₃ = L ₁ −ε, as in the first embodiment. Accordingly, the distance b ₂ between the centers of the two adjacent units among the three adjacent units is b ₂ = L ₁ + L ₃ = 2L ₁ −ε = b ₀ −ε. Also, b ₂ = b ₀ −ε = b ₁ −γ is also replaced.

Here, as described above, since γ <ε, b ₂ <b ₁ <b ₀ is satisfied. Therefore, according to the configuration of the third embodiment, it is possible to further reduce the dimension of the gas insulated switchgear in the Y-axis direction while ensuring the maintenance space α of the first operating device 7. Thereby, the installation area of the gas insulated switchgear can be further reduced.

  Further, by arranging the disconnecting unit 5 so that the axis P of the disconnecting device 51 is vertical, it is possible to reduce the dimension in the X-axis direction of the gas insulated switchgear. Thereby, the installation area of the gas insulated switchgear can be further reduced.

  In the third embodiment, the disconnecting switch 51 and the line side ground switch 52 are unitized as the disconnecting unit 5, but they may be provided separately without being unitized.

  Further, the circuit breaker 1 has been described with reference to a so-called double bus type in which two connection buses 28 and 29 are connected, but the circuit breaker 1 is not limited thereto. For example, one connecting bus may be connected, and various connecting bus routes may be employed. That is, in the case of a gas insulated switchgear in which a plurality of circuit breaker units are arranged in parallel with the axis P of the disconnector parallel, the configuration described in the third embodiment is applied to the arrangement of the first operating device 7. Thus, the installation area can be reduced.

  FIG. 16 is a plan view illustrating an example of an arrangement configuration of a gas-insulated switchgear according to a modification of the third embodiment. FIG. 17 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line E2-E2 shown in FIG. 18 is a cross-sectional view showing the configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line F2-F2 shown in FIG. In FIG. 16, the illustration of the instrument transformer 15 is omitted.

  In this modification, the gas insulated switchgear is configured by using a horizontal circuit breaker 1 in which branch outlets 2a and 2b branch vertically. The disconnecting unit 5 is provided so that the wiring is routed from the branch outlet 2a branched vertically, and the axis P of the disconnector 51 is substantially vertical.

  Further, in adjacent units, that is, in units (I) and (II), in a positive direction parallel to the X axis (around the axis P from the direction in which the first operating device 7 is arranged with respect to the axis P). The axis P of the disconnect switch 51 is shifted in a direction (substantially 90 degrees different). More specifically, the unit (I) is provided with a spacer 9 on the primary side of the disconnecting unit 5. That is, in the unit (I) and the unit (II), the axis P is shifted in the positive direction parallel to the X axis by the distance of the spacer 9.

In this way, by shifting the axis P of the disconnect switch 51 in the positive direction parallel to the X axis between adjacent units, even when the horizontal circuit breaker 1 is used, b ₂ is the same as in the vertical type. <B ₁ <b ₀ (see also FIG. 5).

  Therefore, it is possible to further reduce the dimension of the gas insulated switchgear in the Y-axis direction while securing the maintenance space α of the first operating device 7. Thereby, the installation area of the gas insulated switchgear can be further reduced.

  Further, by arranging the disconnecting unit 5 so that the axis P of the disconnecting device 51 is vertical, it is possible to reduce the dimension in the X-axis direction of the gas insulated switchgear. Thereby, the installation area of the gas insulated switchgear can be further reduced.

  Thus, when the disconnector 51 is adjacently disposed, the arrangement and configuration of the gas insulated switchgear are different from those described above by shifting the axis P of the disconnector 51 in the positive direction parallel to the X axis. Even in this case, the installation area can be reduced.

Embodiment 4 FIG.
FIG. 19 is a plan view showing an example of the arrangement configuration of the gas-insulated switchgear according to the fourth embodiment. FIG. 20 is a cross-sectional view showing the configuration of the unit (I) which is a structural unit of the gas insulated switchgear, and is a view taken along the line GG shown in FIG. FIG. 21 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line HH shown in FIG. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. Further, in FIG. 19, the illustration of the instrument transformer 15 is omitted.

  In the fourth embodiment, as in the third embodiment, the disconnecting unit 5 is arranged so that the axis P of the disconnecting device 51 is substantially vertical (substantially perpendicular to the installation surface 100). Adjacent units differ from each other by about 90 degrees around the axis P from the drawing direction of the branch outlet 2a (a positive direction parallel to the X axis, the direction in which the first operating device 7 is arranged with respect to the axis P). Direction) and the axis P of the disconnector 51 is shifted.

  In the fourth embodiment, a plurality of disconnecting units 5 are connected in parallel to the branch outlet 2a for one unit, and the cable head 13 and the support frame 12 are connected to each disconnecting unit 5.

  With the above configuration, for the same reason as described in the second embodiment and the third embodiment, the size of the gas insulated switchgear can be reduced in the Y-axis direction. The area can be reduced.

  In addition, when a plurality of disconnecting units 5 are provided for one unit and a maintenance space is not secured, the first operating device 7 provided in the central region S can be operated. For this, it is necessary to route the first operating device 7 to a position where it can be easily operated, or to provide a footing to secure a route for accessing the first operating device 7. However, the installation cost of the gas insulated switchgear may increase due to the routing of the operating device or the installation of the scaffold.

  On the other hand, according to the gas-insulated switchgear according to the fourth embodiment, the path T to the first operating device 7 provided in the central region S can be secured, so that the operating device is not routed and the scaffolding is not installed. That's it. Therefore, an increase in installation cost of the gas insulated switchgear can be suppressed.

  In the fourth embodiment, the disconnecting switch 51 and the line-side ground switch 52 are unitized as the disconnecting unit 5, but they may be provided separately without being unitized.

  Further, the circuit breaker 1 has been described with reference to a so-called double bus type in which two connection buses 28 and 29 are connected, but the circuit breaker 1 is not limited thereto. For example, one connecting bus may be connected, and various connecting bus routes may be employed. That is, in the case of a gas insulated switchgear in which a plurality of circuit breaker units are arranged in parallel with the axis P of the disconnector 51 parallel, the configuration described in the fourth embodiment is applied to the arrangement of the first operating device 7. By doing so, the installation area can be reduced.

  FIG. 22 is a plan view illustrating an example of an arrangement configuration of a gas insulated switchgear according to a modification of the fourth embodiment. FIG. 23 is a cross-sectional view showing the configuration of the unit (I), which is a structural unit of the gas insulated switchgear, and is a view taken along the line G2-G2 shown in FIG. 24 is a cross-sectional view showing a configuration of the unit (II) which is a structural unit of the gas insulated switchgear, and is a view taken along the line H2-H2 shown in FIG. In FIG. 22, the illustration of the instrument transformer 15 is omitted.

  In this modification, the gas insulated switchgear is configured by using a horizontal circuit breaker 1 in which branch outlets 2a and 2b branch vertically. The disconnecting unit 5 is provided so that the wiring is routed from the branch outlet 2a branched vertically, and the axis P of the disconnector 51 is substantially vertical.

  Further, in adjacent units, that is, in units (I) and (II), in a positive direction parallel to the X axis (around the axis P from the direction in which the first operating device 7 is arranged with respect to the axis P). The axis P of the disconnect switch 51 is shifted in a direction (substantially 90 degrees different). More specifically, the unit (I) is provided with a spacer 9 on the primary side of the disconnecting unit 5. That is, in the unit (I) and the unit (II), the axis P is shifted in the positive direction parallel to the X axis by the distance of the spacer 9.

  A plurality of disconnecting units 5 are connected in parallel to the branch outlet 2 a for one unit, and a cable head 13 and a support base 12 are connected to each disconnecting unit 5. With this configuration, as described above, the size of the gas insulated switchgear in the Y-axis direction can be reduced, and the installation area of the gas insulated switchgear can be reduced.

  Further, since the route T to the first operating device 7 provided in the central region U can be secured, it is not necessary to route the operating device or install a scaffold. Therefore, an increase in installation cost of the gas insulated switchgear can be suppressed.

  As described above, when a plurality of disconnectors 51 are arranged adjacent to each other, the arrangement and configuration of the gas insulated switchgear are described above by shifting the axis P of the disconnector 51 in the positive direction parallel to the X axis. Even in a different case, the installation area can be reduced and the installation cost can be reduced.

  As described above, the gas-insulated switchgear according to the present invention is useful for a gas-insulated switchgear used in an electric station such as a substation, and in particular, a gas-insulated switchgear in which a plurality of circuit breaker units are provided in parallel. Suitable for

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2a, 2b, 2c Branching outlet 4 Current transformer for instrument 5 Disconnection unit 7 1st operation apparatus 8 2nd operation apparatus 9 Spacer 12 Support stand 13 Cable head 15 Instrument transformer 28, 29 Connection bus 51 Disconnector 52 Line-side Ground Switch 100 Installation Surface 101 Breaker 105 Disconnect Unit 107 Operating Device 128,129 Bus P-axis S, U Central Area T Path

Claims (6)

A plurality of circuit breakers are connected to the busbar, and a circuit breaker unit having a disconnector is a gas insulated switchgear connected to each circuit breaker,
A first operating device disposed on a side of the disconnector to operate the disconnector;
The first operating device is arranged with a difference of about 180 degrees around the axis of the disconnector between the adjacent breaker units ,
The disconnector is provided such that the axis is substantially horizontal,
Adjacent said circuit breaker unit between a first operating device is configured by shifting in the axial direction gas-insulated switchgear apparatus according to claim Rukoto. A plurality of circuit breakers are connected to the busbar, and a circuit breaker unit having a disconnector is a gas insulated switchgear connected to each circuit breaker,
A first operating device disposed on a side of the disconnector to operate the disconnector;
The first operating device is arranged with a difference of about 180 degrees around the axis of the disconnector between the adjacent breaker units,
The disconnector is provided so that the axis is substantially vertical, and between the adjacent breaker units, approximately 90 around the axis from the direction in which the first operating device is disposed with respect to the axis. A gas insulated switchgear characterized in that the axis is shifted in different directions. A plurality of disconnectors connected to one of the circuit breakers are provided side by side in a direction different from the direction in which the first operating device is disposed by about 90 degrees around the axis with respect to the axis. The gas insulated switchgear according to claim 2 . The circuit breaker unit further includes a line side ground switch,
A second operating device for operating the track-side grounding switch, arranged approximately 90 degrees different from the arrangement of the first operating device around the axis;
The gas-insulated switching according to any one of claims 1 to 3 , wherein the second operating device is arranged with the breaker units adjacent to each other being different by approximately 180 degrees around the axis. apparatus. The circuit breaker is provided with a branch outlet that branches horizontally from the side,
The gas-insulated switchgear according to any one of claims 1 to 4 , wherein the circuit breaker unit is connected to the branch outlet. The circuit breaker is provided with a branch outlet vertically branched from the upper surface,
The gas-insulated switchgear according to any one of claims 1 to 4 , wherein the circuit breaker unit is connected to the branch outlet.

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