JP2017158397A - Gas insulation switching apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a gas insulation switching apparatus which is downsized in a direction in which breakers are arranged so that more breakers can be installed in a limited space thereof.SOLUTION: A gas insulation switching apparatus comprises a plurality of first breakers 1a arranged along a first row 61 parallel to a first direction and a plurality of second breakers 1b arranged along a second row 62 parallel to the first direction and opposite to the first row 61. A drawing-out direction of a first connection part 51a from a first breaker 1a and a drawing-out direction of a second connection part 51b from a second breaker 1b are perpendicular to the first direction and opposite to each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gas insulated switchgear in which an insulating gas is sealed inside a tank.

  Some gas-insulated switchgear includes a plurality of circuit breakers as constituent devices arranged in a line. In such a gas insulated switchgear, adjacent circuit breakers are connected by an inter-unit bus. A branch line is branched from the inter-unit bus. In the gas insulated switchgear disclosed in Patent Document 1, the direction in which the inter-unit busbar is drawn out is unified for all circuit breakers. More specifically, the inter-unit bus is drawn out in a direction perpendicular to the direction in which the circuit breakers are arranged.

JP-A-8-223716

  As described above, in the gas insulated switchgear in which the circuit breakers are arranged in a line, the number of circuit breakers that can be installed may be limited because the apparatus becomes longer in the direction in which the circuit breakers are arranged.

  The present invention has been made in view of the above, and a gas capable of installing many circuit breakers in a limited installation space by reducing the size of the apparatus in the direction in which the circuit breakers are arranged. The object is to obtain an insulated switchgear.

  In order to solve the above-mentioned problems and achieve the object, a gas insulated switchgear according to the present invention includes a plurality of first circuit breakers arranged along a first row parallel to a first direction, A plurality of first connection parts for connecting adjacent first circuit breakers, and a first branch part branched from the first connection part and led out to the outside. The gas insulated switchgear includes a plurality of second circuit breakers arranged along a second row parallel to the first direction and facing the first row, and adjacent second circuit breakers. A plurality of second connection portions to be connected, and a second branch portion branched from the second connection portion and led out to the outside. In addition, the gas insulated switchgear is arranged along the first direction among the plurality of first circuit breakers, the circuit breaker arranged on one end side along the first direction, and the plurality of second circuit breakers. A circuit breaker arranged on one end side, one end side return bus connecting the circuit breakers, a circuit breaker arranged on the other end side in the first direction among the plurality of first circuit breakers, and a plurality of second circuit breakers. The other end side return bus | bath which connects the circuit breaker arrange | positioned at the other end side along a 1st direction among circuit breakers of this is provided. In addition, the direction in which the first connection portion is pulled out from the first circuit breaker and the direction in which the second connection portion is pulled out from the second circuit breaker are perpendicular to the first direction and opposite to each other. It becomes.

  According to the gas insulated switchgear according to the present invention, it is possible to install many circuit breakers in a limited space by downsizing the apparatus in the direction in which the circuit breakers are arranged.

Single-line connection diagram of gas-insulated switchgear according to Embodiment 1 of the present invention FIG. 3 is a plan view of the gas insulated switchgear according to the first embodiment. A cross-sectional view along the line AA shown in FIG. Cross-sectional view along the line BB shown in FIG. Cross-sectional view along the line CC shown in FIG. Cross-sectional view taken along line DD shown in FIG. Plan view of a gas insulated switchgear according to Embodiment 2 of the present invention. A cross-sectional view along the line EE shown in FIG. Cross-sectional view taken along line FF shown in FIG. A cross-sectional view along the line GG shown in FIG. FIG. 7 is a cross-sectional view taken along line HH 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 single line connection diagram of a gas insulated switchgear according to Embodiment 1 of the present invention. A schematic configuration of the gas-insulated switchgear according to the first embodiment will be described with reference to FIG. The gas insulated switchgear (GIS) 50 is adjacent to a plurality of first circuit breakers (CB) 1a arranged along a first row 61 parallel to the direction indicated by the arrow X which is the first direction. A plurality of first connection parts 51a that connect the first circuit breakers 1a to each other, and a first branch part 52a that branches from the first connection part 51a and leads the main circuit to the outside.

  The first connecting portion 51a includes an instrument current transformer (CT) 2, bus disconnectors / grounding switches (bus DS / ES) 3, 4, 5 and inter-unit bus 8 and is adjacent to each other. 1 circuit breakers 1a are connected to each other. The first connecting portion 51a may be any one that connects the adjacent first circuit breakers 1a to each other, and includes a current transformer (CT) 2, a bus disconnector / grounding switch (bus DS / ES ) It is not necessary to provide all of 3, 4, and 5. For example, a disconnecting switch may be provided in place of the bus disconnecting switch / grounding switch (bus DS / ES) 3, 4 and 5.

  The first branch part 52a has a line side disconnector / grounding switch / grounding switch with line connection (line side DS / ES / FES) 6 and a cable termination box (CSE) 7, and is a gas insulated switchgear. 50 main circuits are derived to the outside. The first branch part 52a may be any one that allows the main circuit to be led out to the outside. The line side disconnector / grounding switch / grounding switch with input capacity (line side DS / ES / FES) 6, cable It is not necessary to have all of the termination boxes (CSE) 7. For example, the main circuit may be led out from the air bushing without the cable termination box (CSE) 7.

  Further, the gas insulated switchgear 50 includes a plurality of second circuit breakers 1b arranged along a second row 62 parallel to the direction indicated by the arrow X and facing the first row 61, and a second adjacent circuit breaker 1b. A plurality of second connection parts 51b that connect the circuit breakers 1b to each other, and a second branch part 52b that is branched from the second connection part 51b and leads the main circuit to the outside.

  The second connecting portion 51b includes an instrument current transformer (CT) 2, bus disconnectors / grounding switches (bus DS / ES) 3, 4, 5 and inter-unit bus 8 and is adjacent to each other. The two circuit breakers 1b are connected to each other. The second connecting portion 51b only needs to connect the adjacent second circuit breakers 1b to each other, such as an instrument current transformer (CT) 2, a bus disconnector / ground switch (bus DS / ES ) It is not necessary to provide all of 3, 4, and 5. For example, a disconnecting switch may be provided in place of the bus disconnecting switch / grounding switch (bus DS / ES) 3, 4 and 5.

  The second branching section 52b has a line side disconnector / grounding switch / grounding switch with input capacity (line side DS / ES / FES) 6 and a cable termination box (CSE) 7, and is a gas insulated switchgear. 50 main circuits are derived to the outside. The second branch portion 52b may be anything that allows the main circuit to be led out to the outside. The line-side disconnector / grounding switch / grounding switch with input capacity (line-side DS / ES / FES) 6, cable It is not necessary to have all of the termination boxes (CSE) 7. For example, the main circuit may be led out from the air bushing without the cable termination box (CSE) 7.

  Further, the gas insulated switchgear 50 includes a first one-side circuit breaker 1a1 disposed on one end side in the direction indicated by the arrow X among the plurality of first circuit breakers 1a, and a plurality of second circuit breakers 1b. Among these, the one end side return bus 10 which connects the 2nd one end side circuit breaker 1b1 arrange | positioned at the one end side in the direction shown by the arrow X is provided.

  Further, the gas insulated switchgear 50 includes a first other circuit breaker 1a2 disposed on the other end side in the direction indicated by the arrow X among the plurality of first circuit breakers 1a, and a plurality of second circuit breakers. The other end side return bus 11 which connects the 2nd other end side circuit breaker 1b2 arrange | positioned at the other end side in the direction shown by arrow X among 1b is provided.

  As described above, the gas insulated switchgear 50 is an annular bus type gas in which the circuit breakers 1a and 1b installed in two rows are connected by the connecting portions 51a and 51b and the regression buses 10 and 11 to form an annular shape as a whole. Insulated switchgear.

Next, the actual installation state of the gas insulated switchgear 50 will be described. FIG. 2 is a plan view of the gas insulated switchgear 50 according to the first embodiment. 3 is a cross-sectional view taken along line AA shown in FIG. 4 is a cross-sectional view taken along line BB shown in FIG. FIG. 5 is a cross-sectional view taken along the line CC shown in FIG. FIG. 6 is a cross-sectional view taken along line DD shown in FIG. The gas insulated switchgear 50 is configured by sealing an insulating gas, for example, SF ₆ gas, inside a tank.

  In the gas insulated switchgear 50, four first circuit breakers 1 a are arranged along the first row 61. Further, four second circuit breakers 1 b are arranged along the second row 62. That is, the four first circuit breakers 1a and the four second circuit breakers 1b are arranged to face each other.

  The 1st circuit breaker 1a and the 2nd circuit breaker 1b are vertical type circuit breakers, and have two opening parts 63 arranged up and down. The connecting portions 51a and 51b are pulled out horizontally from the two lead portions 63 arranged vertically.

  The direction in which the first connection portion 51a is drawn from the first circuit breaker 1a and the direction in which the second connection portion 51b is drawn from the second circuit breaker 1b are perpendicular to the direction indicated by the arrow X. In addition, the direction in which the first connecting portion 51a is pulled out from the first circuit breaker 1a and the direction in which the second connecting portion 51b is pulled out from the second circuit breaker 1b are opposite to each other. .

  Next, the device configuration around the first circuit breaker 1a that does not become the first one-end circuit breaker 1a1 and the first other-end circuit breaker 1a2 will be described with reference to FIG. The current transformer 2 for an instrument is connected to the opening part 63 of the upper part of the 1st circuit breaker 1a to which the CB operating device 21 was attached to the upper part. Further, a bus disconnector / grounding switch 5 is connected to the instrument current transformer 2. From this bus disconnector / ground switch 5, the inter-unit bus 8 is branched horizontally in the arrangement direction of the first circuit breakers 1 a, and the adjacent first circuit breaker 1 a, that is, the first circuit breaker shown in FIG. 5. Connected to the current transformer 2 and bus disconnector / ground switch 5 connected to the lead-out portion 63 at the upper part of 1a, an annular bus is formed. That is, in the first circuit breaker 1a shown in FIG. 4 and the first circuit breaker 1a shown in FIG. 5, the upper lead parts 63 are connected by the first connection part 51a.

  Returning to FIG. 4, from the bus disconnecting switch / grounding switch 5, the line branching disconnector / grounding switch / grounding switch 6 with input capacity, which is the first branching part 52a, is branched. Then, the power cable 30 is led out from the cable termination box 7 connected to the line side disconnector / grounding switch / grounding switch 6 with input capacity, so that the main circuit of the gas insulated switchgear 50 is led out. The

  The instrument current transformer 2 is connected to the outlet portion 63 at the bottom of the first circuit breaker 1a. In addition, a bus disconnector / ground switch 3 is connected to the current transformer 2. From this bus disconnector / grounding switch 3, the inter-unit bus 8 is branched horizontally in the arrangement direction of the first circuit breakers 1a (see also FIG. 2). The first circuit breaker 1a shown (here, the first one-side circuit breaker 1a1) is connected to the meter current transformer 2 and the bus disconnector / grounding switch 3 connected to the outlet portion 63 at the lower part, and is annular A busbar is formed. That is, in the first circuit breaker 1a shown in FIG. 4 and the first one-end-side circuit breaker 1a1 shown in FIG. 3, the lower lead-out parts 63 are connected to each other by the first connection part 51a.

  It should be noted that the peripheral device configuration of the second circuit breaker 1b that does not become the second one end side circuit breaker 1b1 and the second other end side circuit breaker 1b2 is the drawing direction of the second connection portion 51b and the first connection portion. Since the drawing direction of 51a, that is, the direction of the lead-out portion 63 is basically the same except that they are directed in opposite directions, detailed description thereof is omitted.

  Next, a device configuration around the first one-end circuit breaker 1a1 will be described with reference to FIG. As described above, the first connecting portion 51a drawn from the first circuit breaker 1a shown in FIG. 4 is connected to the opening portion 63 at the lower portion of the first one-side circuit breaker 1a1.

  The current transformer 2 for an instrument is connected to the upper outlet 63 of the first one-side circuit breaker 1a1. Further, a bus disconnector / grounding switch 4 is connected to the instrument current transformer 2. From this bus disconnector / ground switch 4, one end side return bus 10 is drawn out. The one end side return bus 10 is connected to the second one end circuit breaker 1b1. That is, the first one end side circuit breaker 1 a 1 and the second one end side circuit breaker 1 b 1 are connected by the one end side return bus 10.

  The one-end-side regression bus 10 includes a vertical portion 10a that is drawn vertically from the bus disconnector / grounding switch 4 and a horizontal portion 10b that connects the vertical portions. With this configuration, the horizontal portion 10b of the one end side return bus 10 passes through a position higher than the upper ends of the first one end side circuit breaker 1a1 and the second one end side circuit breaker 1b1. On the other hand, one end at the position indicated by the two-dot chain line in FIGS. 2 and 3, that is, at the same height as or lower than the upper ends of the first one end circuit breaker 1a1 and the second one end circuit breaker 1b1. The horizontal portion 10b of the side regression bus 10 may be passed.

  As for the other end side return bus 11 that connects the first other end side circuit breaker 1 a 2 and the second other end side circuit breaker 1 b 2, the vertical portion 11 a and the horizontal portion 11 b are provided in the same manner as the one end side return bus 10. The detailed description is omitted.

  From the bus disconnector / grounding switch 4, a line-side disconnecting switch / grounding switch / grounding switch 6 with input capacity, which is the first branching part 52 a, is branched. Then, the power cable 30 is led out from the cable termination box 7 connected to the line side disconnector / grounding switch / grounding switch 6 with input capacity, so that the main circuit of the gas insulated switchgear 50 is led out. The

  Note that operating devices 23, 24, and 25 for operating the bus disconnector / grounding switches 3, 4, and 5 are attached to the bus disconnector / grounding switches 3, 4, and 5, respectively. Further, operating devices 26 and 27 for operating the line-side disconnector / grounding switch / grounding switch with charging capacity 6 are attached to the line-side disconnecting switch / grounding switch / grounding switch with charging capacity 6. .

  As described above, in the gas insulated switchgear 50 according to the first embodiment, the circuit breakers 1a and 1b are arranged in two rows so that the direction indicated by the arrow X, that is, the circuit breakers 1a and 1b are arranged. It is possible to reduce the size of the gas insulated switchgear 50 in the specified direction. Thereby, many circuit breakers 1a and 1b can be installed in the limited installation space of the gas insulated switchgear 50.

  In addition, with the first circuit breaker 1a arranged along the first row 61 and the second circuit breaker 1b arranged along the second row 62, the pull-out directions of the connecting portions 51a and 51b are changed. Since the directions are opposite, it is not necessary to provide a space for operating or maintaining the operating devices 23, 24, 26, and 27 between the first circuit breaker 1a and the second circuit breaker 1b. Therefore, the gas insulated switchgear 50 can be downsized in the direction indicated by the arrow Y. Thereby, many circuit breakers 1a and 1b can be installed in the limited installation space of the gas insulated switchgear 50.

Embodiment 2. FIG.
FIG. 7 is a plan view of the gas-insulated switchgear according to the second embodiment of the present invention. 8 is a cross-sectional view taken along line EE shown in FIG. 9 is a cross-sectional view taken along line FF shown in FIG. 10 is a cross-sectional view taken along line GG shown in FIG. 11 is a cross-sectional view taken along the line HH shown in FIG. Note that the single-line diagram is the same as that in the first embodiment, and is omitted. Moreover, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In the gas insulated switchgear 70 according to the second exemplary embodiment, the operation device box 40 is provided on the ground between the first circuit breaker 1a and the second circuit breaker 1b. In the operation device box 40, an operation mechanism for operating the bus disconnector / grounding switches 3, 4 and 5 and an operation mechanism for operating the line side disconnector / grounding switch / grounding switch 6 with input capacity are stored together. Has been. Also, the drive wire 41 extending from the operation mechanism housed in the operation device box 40 is connected to the operation devices 23, 24, 25 of the bus disconnector / grounding switches 3, 4, 5 and the line side disconnector / grounding switch / injection. It is connected to each of the operating devices 26 and 27 of the grounded switch 6 with a capacitor.

  As described above, the operation mechanism 23, 24, 25, 26, and 27 can be simplified by integrating the operation mechanism on the operation device box 40 side, and the operation devices 23, 24, 25, 26, and 27 can be simplified. Thinning can be achieved. Thereby, the space | interval of 1st circuit breakers 1a and the space | interval of 2nd circuit breakers 1b can be narrowed, and the further size reduction to the direction shown by the arrow X of the gas insulated switchgear 70 can be achieved.

  In addition, since the operation mechanism is grouped on the operation device box 40 side, the operation device box 40 can be collectively operated and maintained, so that operability and maintainability can be improved. In addition, since the operation device box 40 is provided on the ground, the operability and the operation device 23, 24, 25, 26, and 27 are more easily operated and maintained than the operation devices 23, 24, 25, 26, and 27 that are provided hollow as in the first embodiment. Maintainability is improved.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 1a 1st circuit breaker, 1a1 1st one end side circuit breaker, 1a2 1st other end side circuit breaker, 1b 2nd circuit breaker, 1b1 2nd one end side circuit breaker, 1b2 2nd other end side circuit breaker 2, 2 Current transformer (CT), 3, 4, 5 Bus disconnector / ground switch (bus DS / ES), 6 Line side disconnector / ground switch / grounding switch with input capacity (line side) DS / ES / FES), 7 cable termination box (CSE), 8 inter-unit bus, 10 one-end regression bus, 10a vertical section, 10b horizontal section, 11 other-end regression bus, 11a vertical section, 11b horizontal section, 21 CB operating device, 23, 24, 25, 26, 27 operating device, 40 operating device box, 50, 70 gas insulated switchgear, 51a first connecting portion, 51b second connecting portion, 52a first branching portion, 52b second branch 61 first row 6 2 Second row, 63 outlet.

Claims (3)

A plurality of first circuit breakers arranged along a first row parallel to the first direction;
A plurality of first connecting portions for connecting adjacent first circuit breakers; and
A first branch portion branched from the first connection portion and led out to the outside;
A plurality of second circuit breakers arranged along a second row parallel to the first direction and facing the first row;
A plurality of second connection parts for connecting the adjacent second circuit breakers; and
A second branch part branched from the second connection part and led out to the outside;
Among the plurality of first circuit breakers, the circuit breaker disposed on one end side along the first direction, and among the plurality of second circuit breakers disposed on one end side along the first direction. The one end side return bus for connecting the circuit breaker,
The circuit breaker disposed on the other end side along the first direction among the plurality of first circuit breakers, and the other end side along the first direction among the plurality of second circuit breakers. A circuit breaker disposed on the other end, and a return bus on the other end side connecting the circuit breaker,
The direction of pulling out the first connection part from the first circuit breaker and the direction of pulling out the second connection part from the second circuit breaker are perpendicular to the first direction. A gas insulated switchgear characterized by being in opposite directions. The one end side regression bus and the other end side regression bus have a horizontal portion extending horizontally,
The gas insulated switchgear according to claim 1, wherein the horizontal portion is provided at a position higher than an upper end of the circuit breaker. The one end side regression bus and the other end side regression bus have a horizontal portion extending horizontally,
2. The gas insulated switchgear according to claim 1, wherein the horizontal portion is provided at the same height as the upper end of the circuit breaker or at a position lower than the upper end of the circuit breaker.

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