JP2016187268A - Gas-insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-insulated switchgear of double bus system capable of shortening the dimension of the double bus in the elongation direction, while enhancing the economical efficiency.SOLUTION: A gas-insulated switchgear includes a main bus 1A elongating in a first direction, a main bus 2A arranged on the same line with the main bus 1A, a bus section unit 2 for sectioning the main buses 1A, 2A, a main bus 1B in parallel with the main bus 1A, a main bus 2B arranged on the same straight line as the main bus 1B, a bus section unit 7 for sectioning the main buses 1B, 2B, a bus contact unit 8 for bringing the main buses 1A, 1B into contact, and a bus contact unit 4 for bringing the main buses 2A, 2B into contact. A bus section unit 3 and the bus contact unit 8 are arranged on the same straight line in a second direction, in the top view, and the bus section unit 7 and bus contact unit 4 are arranged on the same straight line in the second direction, in the top view.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a double-bus type gas insulated switchgear.

  A conventional double-bus type gas insulated switchgear is generally configured to include two bus-bar division units that respectively divide a double bus and two bus-bar connection units that connect the double bus (Patent Document). 1 and FIG. 12). Here, the two bus bar dividing units are arranged in the extending direction of the double bus bar, and the two bus bar connecting units are arranged on both sides of the two bus bar dividing units.

  Moreover, in FIG. 21 of patent document 2, the gas insulated switchgear by which two bus-bar division units are arrange | positioned in the direction orthogonal to the extending | stretching direction of a double bus is described.

JP 2000-184529 A Japanese Patent Laid-Open No. 10-257620

  In the gas insulated switchgear described in Patent Document 1, two bus bar division units are arranged in the extending direction of the double bus bar, and the two bus bar connecting units are arranged on both sides of the two bus bar division units. The length of the bus bar in the extending direction was long, and there were cases where the installation location was restricted.

  Moreover, in the gas insulated switchgear described in Patent Document 2, although the dimension in the extending direction of the double bus is shortened, the two used for connection between the double bus and the two bus section units are used. The connection buses are arranged so as to overlap with the double buses at both ends, and the length of the connection buses is required by an amount corresponding to the overlap, so that the economical efficiency is lowered.

  The present invention has been made in view of the above, and provides a double-bus type gas-insulated switchgear that can shorten the dimension of the double-bus in the extending direction and also improves the economy. Objective.

  In order to solve the above-described problems and achieve the object, a gas-insulated switchgear according to the present invention includes a first main bus extending in a horizontal first direction, and a straight line identical to the first main bus. A second main bus bar arranged above, a first bus bar dividing unit that divides the first main bus bar and the second main bus bar, and parallel to and the same height as the first main bus bar The third main bus bar arranged on the same line, the fourth main bus bar arranged on the same straight line as the third main bus bar, and the third main bus bar and the fourth main bus bar are divided. A second bus section unit, a first bus connecting unit that communicates the first main bus and the third main bus, and a second main bus and the fourth main bus that communicate with each other. A double bus type gas insulated switchgear comprising a second busbar communication unit, wherein the first busbar section unit and the front The first busbar connection units are arranged on the same straight line in a second direction that is orthogonal to the first direction and in the horizontal direction when viewed from above, and are connected to each other by the first connection busbars arranged on the same straight line. The second busbar connecting unit is connected, and the second busbar dividing unit and the second busbar communication unit are arranged on the same straight line in the second direction in a top view and arranged on the same straight line. Are connected to each other, and a first energization path from the first bus section unit to the second main bus line and a second energization path from the second bus section unit to the third main bus line are: Each is L-shaped when viewed from above, wherein the first bus connection unit branches from the second energization path, and the second bus connection unit branches from the first energization path. And

  According to the present invention, there is an effect that it is possible to provide a double-bus type gas insulated switchgear that can shorten the dimension of the double-bus in the extending direction and improve the economy.

Single line connection diagram of gas insulated switchgear according to embodiment The top view which shows the structure of the gas insulated switchgear which concerns on embodiment AA side view of FIG. BB side view of FIG. CC side view of FIG.

  Embodiments of a gas insulated switchgear according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment FIG. 1 is a single line connection diagram of a gas insulated switchgear according to the present embodiment. As shown in FIG. 1, the gas insulated switchgear according to the present embodiment includes main buses 1A and 2A, main buses 1B and 2B that form a double bus with main buses 1A and 2A, main bus 1A, and main bus 1A. A bus segmenting unit 3 for segmenting the bus 2A, a bus segmenting unit 7 for segmenting the main bus 1B and the main bus 2B, a bus connecting unit 8 for connecting the main bus 1A and the main bus 1B, and a main bus 2A A bus connecting unit 4 for connecting the main bus 2B, a protective measuring unit 5 connected to the main bus 1A, a protective measuring unit 6 connected to the main bus 2A, and a protective measuring unit 9 connected to the main bus 2B. And a protective measuring unit 10 connected to the main bus 1B.

  The bus section unit 3 as the first bus section unit is disposed between the circuit breaker 19, a pair of disconnectors 17 and 21 disposed on both sides of the circuit breaker 19, and the circuit breaker 19 and the disconnector 17. An instrument current transformer 18, and an instrument current transformer 20 disposed between the circuit breaker 19 and the disconnector 21. Here, the disconnectors 17 and 21 are each a disconnector with a ground switch. The circuit breaker 19 is a first circuit breaker, and the pair of disconnectors 17 and 21 are a pair of first disconnectors.

  The bus section unit 7 as the second bus section unit is disposed between the circuit breaker 52, the pair of disconnectors 50 and 54 disposed on both sides of the circuit breaker 52, and the circuit breaker 52 and the disconnector 50. An instrument current transformer 51, and an instrument current transformer 53 disposed between the circuit breaker 52 and the disconnecting switch 54. Here, the disconnectors 50 and 54 are each a disconnector with a ground switch. The circuit breaker 52 is a second circuit breaker, and the pair of disconnectors 50 and 54 are a pair of second disconnectors.

  The bus connecting unit 8 as the first bus connecting unit is disposed between the circuit breaker 47, a pair of disconnectors 45 and 49 disposed on both sides of the circuit breaker 47, and the circuit breaker 47 and the disconnector 45. An instrument current transformer 46, and an instrument current transformer 48 disposed between the circuit breaker 47 and the disconnecting switch 49. Here, the disconnectors 45 and 49 are each a disconnector with a ground switch. The circuit breaker 47 is a third circuit breaker, and the pair of disconnectors 45 and 49 are a pair of third disconnectors.

  The bus connecting unit 4 as the second bus connecting unit is arranged between the circuit breaker 24, a pair of disconnectors 22 and 26 disposed on both sides of the circuit breaker 24, and the circuit breaker 24 and the disconnector 22. An instrument current transformer 23 and an instrument current transformer 25 arranged between the circuit breaker 24 and the disconnector 26. Here, the disconnectors 22 and 26 are each a disconnector with a ground switch. The circuit breaker 24 is a fourth circuit breaker, and the pair of disconnectors 22 and 26 are a pair of fourth disconnectors.

  The protection measurement unit 6 as the first protection measurement unit includes disconnectors 29, 31 connected to the main bus 2A, an instrument transformer 30 connected to the disconnector 29, and a lightning arrester connected to the disconnector 31. 32 and a ground switch 28 connected to the main bus 2A. As described above, the protection measurement unit 6 includes the lightning arrester 32 having a protection function and the instrument transformer 30 having a measurement function. The disconnector 29 is the fifth disconnector, the disconnector 31 is the sixth disconnector, the instrument transformer 30 is the first instrument transformer, the lightning arrester 32 is the first lightning arrester, and the ground switch 28 is the first. 1 is a grounding switch.

  The protection measurement unit 10 as the second protection measurement unit includes disconnectors 40 and 42 connected to the main bus 1B, a lightning arrester 41 connected to the disconnector 40, and an instrument transformer connected to the disconnector 42. 43 and a ground switch 44 connected to the main bus 1B. As described above, the protective measuring unit 10 includes the lightning arrester 41 having a protective function and the instrument transformer 43 having a measuring function. The disconnector 42 is the seventh disconnector, the disconnector 40 is the eighth disconnector, the instrument transformer 43 is the second instrument transformer, the arrester 41 is the second arrester, and the ground switch 44 is the second. 2 is a ground switch.

  The protective measurement unit 5 which is the third protective measurement unit includes disconnectors 11 and 13 connected to the main bus 1A, an instrument transformer 12 connected to the disconnector 11, and a lightning arrester connected to the disconnector 13. 14. Thus, the protection measurement unit 5 includes the lightning arrester 14 having a protection function and the instrument transformer 12 having a measurement function. The disconnector 11 is a ninth disconnector, the disconnector 13 is a tenth disconnector, the instrument transformer 12 is a third instrument transformer, and the arrester 14 is a third arrester.

  The protection measurement unit 9 as the fourth protection measurement unit includes disconnectors 56 and 58 connected to the main bus 2B, an instrument transformer 57 connected to the disconnector 56, and a lightning arrester connected to the disconnector 58. 59. As described above, the protective measuring unit 9 includes the lightning arrester 59 having a protective function and the instrument transformer 57 having a measuring function. The disconnector 56 is an eleventh disconnector, the disconnector 58 is a twelfth disconnector, the instrument transformer 57 is a fourth instrument transformer, and the lightning arrester 59 is a fourth lightning arrester.

  2 is a top view showing the configuration of the gas-insulated switchgear according to the present embodiment, FIG. 3 is a side view taken along the line AA in FIG. 2, FIG. 4 is a side view taken along the line BB in FIG. FIG. 3 is a CC side view of FIG. 2. Hereinafter, the arrangement configuration of the gas insulated switchgear according to the present embodiment will be described with reference to FIGS.

  Main bus 1A extends linearly in a horizontal direction. Main bus 1A is a first main bus. The extending direction of the main bus 1A is referred to as a first direction. The horizontal direction orthogonal to the first direction is referred to as the second direction. Main bus 2A is arranged on the same straight line as main bus 1A. That is, main bus 2A extends in the first direction at the same height as main bus 1A. Main bus 2A is a second main bus. Main bus 1B extends in the first direction at the same height as main bus 1A. The main buses 1A and 1B are arranged in parallel in the second direction at a constant interval. Main bus 1B is a third main bus. Main bus 2B extends in the first direction at the same height as main bus 2A. The main buses 2A and 2B are arranged in parallel in the second direction at a constant interval. Main bus 2B is a fourth main bus.

  The protective measurement unit 5 is arranged in the second direction when viewed from above. That is, the protection measurement unit 5 extends in the second direction when viewed from above. In addition, the protective measurement unit 5 is disposed on the opposite side of the main buses 1B and 2B with respect to the main buses 1A and 2A in the second direction in a top view.

  The protection measurement unit 5 is connected to the main bus 1A so as to branch from the main bus 1A. Disconnector 11 is connected to main bus 1A. An instrument transformer 12 is disposed below the disconnector 11. The instrument transformer 12 is connected to the disconnector 11. The instrument transformer 12 measures the voltage of the conductor in the main bus 1A. A disconnector 13 is connected to the disconnector 11. A lightning arrester 14 is disposed below the disconnector 13. The lightning arrester 14 is connected to the disconnector 13. Main bus 1A and disconnectors 11 and 13 are arranged at the same height.

  The protective measurement unit 10 is arranged in the second direction when viewed from above. That is, the protective measurement unit 10 extends in the second direction when viewed from above. Further, the protective measurement unit 10 is arranged on the opposite side of the main buses 1A and 2A with respect to the main buses 1B and 2B in the second direction in a top view.

  The protective measurement unit 10 is connected to the main bus 1B so as to branch from the main bus 1B. Disconnector 40 is connected to main bus 1B. A lightning arrester 41 is disposed below the disconnector 40. The lightning arrester 41 is connected to the disconnector 40. A disconnector 42 is connected to the disconnector 40. An instrument transformer 43 is disposed below the disconnector 42. The instrument transformer 43 is connected to the disconnector 42. Instrument transformer 43 measures the voltage of the conductor in main bus 1B. A ground switch 44 is connected to the disconnector 42. The main bus 1B, the disconnecting switches 40 and 42, and the ground switch 44 are arranged at the same height.

  The bus bar dividing unit 3 is arranged in the second direction when viewed from above. That is, the bus bar dividing unit 3 extends in the second direction when viewed from above. The bus section unit 3 is arranged on the opposite side of the main buses 1B and 2B with respect to the main buses 1A and 2A in the second direction in a top view.

  The disconnect switch 17 is connected to the main bus 1 </ b> A via a T-shaped connection bus 15. The disconnector 17 is arranged at the same height as the main bus 1A. The disconnecting switch 17 is connected to a circuit breaker 19 disposed below the disconnecting switch 17 through an instrument current transformer 18. Here, the circuit breaker 19 is a horizontal circuit breaker whose axis is the second direction. The circuit breaker 19 has two branch outlets at the top, and the disconnector 17 is connected to one of them. A disconnector 21 is connected to the other of the two branch outlets of the circuit breaker 19 via an instrument current transformer 20. That is, the disconnectors 17 and 21 are connected to both sides of the circuit breaker 19 and to the upper part. The disconnector 21 is disposed at the same height as the disconnector 17. The instrument current transformers 18 and 20 measure the current flowing through the conductors connected to the circuit breaker 19 on both sides of the circuit breaker 19, respectively.

  The bus bar connection unit 8 is arranged in the second direction when viewed from above. That is, the bus bar connection unit 8 extends in the second direction when viewed from above. The bus bar communication unit 8 is arranged on the opposite side of the main buses 1A and 2A with respect to the main buses 1B and 2B in the second direction in a top view.

  The disconnect switch 45 is connected to the ground switch 44 in the protection measurement unit 10 through the connection bus 1Bb extending in the first direction. The disconnect switch 45 is connected to a circuit breaker 47 disposed below the disconnect switch 45 through an instrument current transformer 46. Here, the circuit breaker 47 is a horizontal circuit breaker whose axis is the second direction. The circuit breaker 47 has two branch outlets at the top, and the disconnector 45 is connected to one of them. A disconnector 49 is connected to the other of the two branch outlets of the circuit breaker 47 via an instrument current transformer 48. That is, the disconnectors 45 and 49 are connected to both sides and the upper part of the circuit breaker 47. The disconnector 49 is arranged at the same height as the disconnector 45. The instrument current transformers 46 and 48 measure the current flowing through the conductors connected to the circuit breaker 47 on both sides of the circuit breaker 47, respectively.

  Further, the bus section unit 3 and the bus connecting unit 8 are arranged on the same straight line in the second direction in a top view, and are connected to each other by a connection bus 16 arranged on the same straight line. That is, the disconnector 17 in the bus section unit 3 is connected to one end portion of the connection bus 16 extending in the second direction via the T-shaped connection bus 15. Accordingly, the main bus 1A, the disconnector 17 and the connection bus 16 are connected to each other via the T-shaped connection bus 15. Further, the disconnector 49 in the bus connection unit 8 is connected to the other end of the connection bus 16. The disconnectors 17 and 49 are arranged at the same height.

  The busbar connection unit 4 is arranged in the second direction when viewed from above. That is, the bus bar connection unit 4 extends in the second direction when viewed from above. The bus bar communication unit 4 is disposed on the opposite side of the main bus bars 1B and 2B with respect to the main bus bars 1A and 2A in the second direction in a top view.

  The disconnector 22 is connected to the disconnector 21 in the bus section unit 3 via the connection bus 2Aa extending in the first direction. The disconnector 22 is disposed at the same height as the disconnector 21. The disconnector 22 is connected to a breaker 24 disposed below the disconnector 22 via an instrument current transformer 23. Here, the circuit breaker 24 is a horizontal circuit breaker whose axis is the second direction. The circuit breaker 24 has two branch outlets at the top, and the disconnector 22 is connected to one of them. A disconnector 26 is connected to the other of the two branch outlets of the circuit breaker 24 via an instrument current transformer 25. That is, the disconnectors 22 and 26 are connected to both sides of the circuit breaker 24 and to the upper part. The disconnector 26 is disposed at the same height as the disconnector 22. The instrument current transformers 23 and 25 each measure the current flowing through the conductor connected to the circuit breaker 24 on both sides of the circuit breaker 24.

  The bus bar dividing unit 7 is arranged in the second direction when viewed from above. In other words, the bus bar dividing unit 7 extends in the second direction when viewed from above. The bus section unit 7 is arranged on the opposite side of the main buses 1A and 2A with respect to the main buses 1B and 2B in the second direction in a top view.

  The disconnector 50 is connected to the disconnector 45 in the busbar communication unit 8 via a connection busbar 1Ba extending in the first direction. The disconnector 50 is arranged at the same height as the disconnector 45. The disconnect switch 50 is connected to a circuit breaker 52 disposed below the disconnect switch 50 through an instrument current transformer 51. Here, the circuit breaker 52 is a horizontal circuit breaker whose axis is the second direction. The circuit breaker 52 has two branch outlets at the top, and the disconnector 50 is connected to one of them. A disconnector 54 is connected to the other of the two branch outlets of the circuit breaker 52 via an instrument current transformer 53. That is, the disconnectors 50 and 54 are connected to both sides of the circuit breaker 52 and to the upper part. The disconnector 54 is arranged at the same height as the disconnector 50. The instrument current transformers 51 and 53 measure currents flowing through conductors connected to the circuit breaker 52 on both sides of the circuit breaker 52, respectively. The disconnector 54 is connected to the main bus 2 </ b> B via a T-shaped connection bus 55.

  Further, the bus section unit 7 and the bus connecting unit 4 are arranged on the same straight line in the second direction in a top view, and are connected to each other by a connection bus 27 arranged on the same straight line. That is, the disconnector 54 in the bus section unit 7 is connected to one end portion of the connection bus 27 extending in the second direction via the T-shaped connection bus 55. Accordingly, the main bus 2B, the disconnector 54 and the connection bus 27 are connected to each other via the T-shaped connection bus 55. Further, the disconnector 26 in the bus connection unit 4 is connected to the other end of the connection bus 27. The disconnectors 26 and 54 are arranged at the same height.

  The protective measurement unit 9 is arranged in the second direction when viewed from above. That is, the protection measurement unit 9 extends in the second direction when viewed from above. Further, the protective measurement unit 9 is arranged on the opposite side of the main buses 1A and 2A from the main buses 1B and 2B in the second direction in a top view.

  The arrangement of the components of the protective measurement unit 9 is the same as that of the protective measurement unit 5. Specifically, it is as follows. The protective measuring unit 9 is connected to the main bus 2B so as to branch from the main bus 2B. Disconnector 56 is connected to main bus 2B. An instrument transformer 57 is disposed below the disconnector 56. The instrument transformer 57 is connected to the disconnector 56. Instrument transformer 57 measures the voltage of the conductor in main bus 2B. A disconnector 58 is connected to the disconnector 56. A lightning arrester 59 is disposed below the disconnector 58. The lightning arrester 59 is connected to the disconnector 58. Main bus 2B and disconnectors 56 and 58 are arranged at the same height.

  The protective measurement unit 6 is arranged in the second direction when viewed from above. That is, the protective measurement unit 6 extends in the second direction when viewed from above. In addition, the protective measurement unit 6 is disposed on the opposite side of the main buses 1B and 2B with respect to the main buses 1A and 2A in the second direction in a top view.

  The arrangement of the components of the protective measurement unit 6 is the same as that of the protective measurement unit 10. Specifically, it is as follows. The ground switch 28 is connected to the disconnector 22 in the busbar communication unit 4 via the connection busbar 2Ab extending in the first direction. A disconnecting switch 29 is connected to the ground switch 28. An instrument transformer 30 is disposed below the disconnector 29. The instrument transformer 30 is connected to the disconnector 29. Instrument transformer 30 measures the voltage of the conductor in main bus 2A. A disconnector 31 is connected to the disconnector 29. A lightning arrester 32 is disposed below the disconnector 31. The lightning arrester 32 is connected to the disconnector 31. Disconnector 31 is connected to main bus 2A. The main bus 2A, the disconnecting switches 29 and 31, and the ground switch 28 are arranged at the same height.

  The connection bus 16 is the first connection bus, the connection bus 27 is the second connection bus, the connection bus 15 is the third connection bus, the connection bus 55 is the fourth connection bus, and the connection bus 2Ab is the fifth connection. The bus and connection bus 2Aa are the sixth connection bus, the connection bus 1Bb is the seventh connection bus, and the connection bus 1Ba is the eighth connection bus.

  The gas insulated switchgear is disposed on the installation surface 70. The collective terminal box 60 houses a control panel of components constituting the gas insulated switchgear.

  As shown in FIG. 1 and FIG. 2, the first energization path from the bus section unit 3 to the main bus 2A is composed of the connection bus 2Aa, the connection bus 2Ab, and the protection measurement unit 6, and is L-shaped in a top view. Yes, the second energization path from the bus section unit 7 to the main bus 1B is composed of the connection bus 1Ba, the connection bus 1Bb, and the protection measurement unit 10, and is L-shaped in top view. The bus connection unit 4 branches from the first energization path, and the bus connection unit 8 branches from the second energization path.

  In the present embodiment, the bus bar dividing unit 3 and the bus bar connecting unit 8 are arranged on the same straight line in the second direction when viewed from above, and the bus bar segment unit 7 and the bus bar connecting unit 4 are second when viewed from above. It is arranged on the same straight line in the direction of. As a result, the dimension in the second direction occupied by these four units is given by the dimension between the units represented by the dimension between the bus section unit 3 and the bus bar connecting unit 4. Compared with a simple configuration, the dimension of the gas insulated switchgear in the second direction is shortened.

  In the present embodiment, the first energization path extending from the bus section unit 3 to the main bus 2A is L-shaped when viewed from above, and the second energization path extending from the bus section unit 7 to the main bus 1B is L when viewed from above. It is a letter shape. As a result, the main buses 1A, 1B, 2A, 2B and the connection buses 1Ba, 1Bb, 2Aa, 2Ab do not overlap in the second direction, so that the economy is improved as compared with the conventional configuration.

  In the present embodiment, the disconnecting switches 17, 21, 22, 26, 45, 49, 50, 54 are each disconnecting switches with a grounding switch. However, no grounding switch is provided, or the grounding switch is disconnected. The structure provided separately from a vessel may be sufficient.

  In this embodiment, the current transformers 18, 20, 23, 25, 46, 48, 51, 53 are provided, but a configuration without these is also possible.

  In the present embodiment, the gas insulated switchgear has been described with respect to the configuration including the protective measuring units 5, 6, 9, and 10. However, the unit configuration other than the bus segment units 3 and 7 and the bus connection units 4 and 8 is appropriately selected. Necessary configurations can be added or deleted. For example, a gas insulated switchgear is generally provided with a power transmission / reception unit connected to a power transmission line.

  In the present embodiment, the first energization path is configured by the connection bus 2Aa, the connection bus 2Ab, and the protection measurement unit 6. However, the protection measurement unit 6 may be replaced with a connection bus that extends in the second direction. It is. Similarly, the second energization path is configured by the connection bus 1Ba, the connection bus 1Bb, and the protection measurement unit 10, but it is also possible to replace the protection measurement unit 10 with a connection bus extending in the second direction.

  1A, 1B, 2A, 2B Main bus, 1Ba, 1Bb, 2Aa, 2Ab, 15, 16, 27, 55 Connection bus, 3, 7 Bus division unit, 4, 8 Bus connection unit, 5, 6, 9, 10 Protection Measuring unit 11, 13, 17, 21, 22, 26, 29, 31, 40, 42, 45, 49, 50, 54, 56, 58 Disconnector, 12, 30, 43, 57 Instrument transformer, 14 , 32, 41, 59 Lightning arrester, 18, 20, 23, 25, 46, 48, 51, 53 Current transformer for instrument, 19, 24, 47, 52 Circuit breaker, 28, 44 Grounding switch, 60 Collective terminal box 70 Installation surface.

Claims (4)

A first main bus extending in a horizontal first direction; a second main bus arranged on the same straight line as the first main bus; the first main bus and the second main A first bus segmenting unit for segmenting a bus, a third main bus arranged in parallel with the first main bus and at the same height, and arranged on the same straight line as the third main bus A fourth main bus line, a second bus line dividing unit for dividing the third main bus line and the fourth main bus line, and the first main bus line and the third main bus line are connected to each other. A double-bus type gas-insulated switchgear comprising a first bus connecting unit that performs communication with a second bus connecting unit that connects the second main bus and the fourth main bus,
The first bus section unit and the first bus connecting unit are disposed on the same straight line in a second direction that is orthogonal to the first direction and horizontal, as viewed from above, and are disposed on the same straight line. Connected to each other by a first connection bus,
The second bus section unit and the second bus connecting unit are arranged on the same straight line in the second direction in a top view, and are connected to each other by a second connection bus arranged on the same straight line. And
The first energization path from the first bus section unit to the second main bus line and the second energization path from the second bus section unit to the third main bus line are each in a top view, L-shaped,
The gas insulated switchgear characterized in that the first busbar communication unit branches from the second energization path, and the second busbar communication unit branches from the first energization path. The first bus section unit includes a first circuit breaker having an axis line in the second direction, and a pair of first disconnectors connected to both sides of the first circuit breaker and at an upper portion thereof. Prepared,
The second bus section unit includes a second circuit breaker having an axis line in the second direction, and a pair of second disconnectors connected to both sides of the second circuit breaker and to an upper portion thereof. Prepared,
One of the pair of first disconnectors, the first main bus and the first connection bus are connected to each other by a T-shaped third connection bus;
The one of the pair of second disconnectors, the fourth main bus, and the second connection bus are connected to each other by a T-shaped fourth connection bus. The gas insulated switchgear described. The first busbar communication unit includes a third circuit breaker having an axis line in the second direction, and a pair of third disconnectors connected to both sides of the third circuit breaker and at an upper portion thereof. Prepared,
The second bus bar communication unit includes a fourth circuit breaker having an axis line in the second direction, and a pair of fourth disconnectors connected to both sides of the fourth circuit breaker and at an upper portion thereof. Prepared,
One of the pair of third disconnectors is connected to the first connection bus;
One of the pair of fourth disconnectors is connected to the second connection bus;
The first energization path is connected to the second main bus line and arranged in the second direction in a top view, the first protection measurement unit, and the pair A fifth connecting bus that connects the other of the fourth disconnectors and extends in the first direction, the other of the pair of fourth disconnectors and the other of the pair of first disconnectors And a sixth connection busbar extending in the first direction and connecting the
The second energization path is connected to the third main bus bar and arranged in the second direction in a top view, the second protection measurement unit, and the pair A seventh connecting bus that connects the other of the third disconnectors and extends in the first direction, the other of the pair of third disconnectors and the other of the pair of second disconnectors The gas insulated switchgear according to claim 2, wherein the gas insulated switchgear is configured by an eighth connection busbar extending in the first direction. The first protection measurement unit includes a first grounding switch connected to the fifth connection bus, a fifth disconnecting switch connected to the first grounding switch, and the fifth disconnecting switch. A first instrument transformer disposed at a lower portion of the instrument and connected to the fifth disconnector; a sixth disconnector connected to the fifth disconnector; and a sixth disconnector A first lightning arrester disposed at a lower portion of the first and connected to the sixth disconnector,
The second protective measuring unit includes a second ground switch connected to the seventh connection bus, a seventh disconnect switch connected to the second ground switch, and the seventh disconnect switch. A second instrument transformer disposed at a lower portion of the instrument and connected to the seventh disconnector; an eighth disconnector connected to the seventh disconnector; and an eighth disconnector The gas insulated switchgear according to claim 3, further comprising: a second lightning arrester disposed at a lower portion of the first arrester and connected to the eighth disconnector.

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