Gas-insulated switchgear and power receiving and transforming equipment

Abstract

To dispose a transformer close to a gas-insulated switchgear.SOLUTION: A gas-insulated switchgear (101) comprises: a bus chamber (2) having a power reception-side bus and a transformer-side bus; a transformer unit (3) disposed below the bus chamber (2) to open / close between the transformer-side bus and a primary side of a transformer; a connection unit (4) disposed on a side of the transformer unit (3) to connect the transformer unit (3) and the transformer together; and a power reception unit (1) disposed on the bus chamber (2) and above the connection unit (4) to open / close between the power reception-side bus and a line. The power reception unit (1) has lead-in pipes (20c and 20d) disposed at positions that do not face the transformer on a side surface of a first unit (11) above the connection unit (4) to lead-in lines.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a gas-insulated switchgear and power receiving and transforming equipment including the gas-insulated switchgear configuration.

Background Art

[0002] Generally, power receiving and transforming equipment is provided in facilities, buildings, etc. In such power receiving and transforming equipment, a gas-insulated switchgear that is small and has a small installation area is preferably used. For example, Patent Document 1 describes a gas-insulated switchgear having a configuration miniaturized by stacking a transformer unit, a busbar chamber, and a power receiving unit from below.

Prior Art Documents

Patent Documents

[0003] <所

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above gas-insulated switchgear, the lead-in portion provided in the power receiving unit container for housing the power receiving unit is arranged on the side where the transformer connected to the transformer unit is arranged. Therefore, it is necessary to secure a space for arranging the power receiving bushing connected to the lead-in portion between the power receiving unit container and the transformer. Therefore, a large interval must be secured between the gas-insulated switchgear and the transformer, and there is a problem that the installation area of the power receiving and transforming equipment including the gas-insulated switchgear and the transformer becomes large.

[0005] One aspect of the present invention aims to arrange a transformer in proximity to a gas-insulated switchgear.

Means for Solving the Problems

[0006] To solve the above problems, a gas-insulated switchgear according to one aspect of the present invention comprises: a bus chamber having a power receiving bus and a transformer bus; a transformer unit disposed below the bus chamber and opening and closing the connection between the transformer bus and the primary side of the transformer; a connection unit disposed to the side of the transformer unit and connecting the transformer unit and the transformer; and a power receiving unit disposed above the bus chamber and above the connection unit and opening and closing the connection between the power receiving bus and the power line, wherein the power receiving unit has a pull-in section for drawing in the power line, and the pull-in section is located above the connection unit on the side of the power receiving unit, not facing the transformer.

[0007] With the above configuration, the inlet does not obstruct the connection of the transformer to the gas-insulated switchgear. This allows the transformer to be positioned close to the gas-insulated switchgear.

[0008] In the gas-insulated switchgear, the inlet portion may be positioned so as to face a direction perpendicular to the direction in which the transformer is positioned relative to the power receiving unit.

[0009] According to the above configuration, the entry points can be positioned opposite each other on the side of the power receiving unit. This allows the entry points to be appropriately selected and used depending on the usage conditions of the gas-insulated switchgear.

[0010] In the gas-insulated switchgear, the draw-in section may have a structure that can be used in both cases: when the line is a cable drawn in via a cable head, and when the line is an overhead line drawn in via a bushing.

[0011] According to the above configuration, even if the track connection configuration differs, the same structure of the connection section can be used. This eliminates the need to change the placement of the power receiving unit and transformer unit depending on the connection configuration. Therefore, the equipment constituting the power receiving unit and the equipment constituting the transformer unit can be standardized between cable connection and bushing connection. Consequently, regardless of the connection configuration, the power receiving unit 1 and the transformer unit 3 can be placed in the same location. Thus, the design, manufacturing process, etc., of gas-insulated switchgear with different connection configurations can be standardized.

[0012] In the gas-insulated switchgear, the busbar chamber, the power receiving unit, the transformer unit, and the connection unit each have a container that forms their respective outer casing, and an insulating gas is sealed inside each container. The container that forms the outer casing of the power receiving unit may be divided into a plurality of segmented containers.

[0013] According to the above configuration, the equipment constituting the power receiving unit can be individually arranged in containers divided according to their function. This ensures sufficient insulation distance between the equipment. Therefore, insulating gases with low insulation performance and environmental impact can be used.

[0014] In the gas-insulated switchgear, the divided containers are a first container and a second container, the first container is located above the busbar chamber, the second container is located above the connection unit, and the pull-in section may be located on the side of the second container.

[0015] With the above configuration, the space above the connection unit can be used for pulling in the track via the pull-in section. This allows for effective use of the limited space where the gas-insulated switchgear is installed.

[0016] The power receiving and transforming equipment according to one aspect of the present invention includes any one of the gas-insulated switchgears, the transformer connected to the transformer unit of the gas-insulated switchgear, and the instrument transformer for power supply and demand connected to the power receiving side bus and the transformer side bus.

[0017] According to the above configuration, the transformer can be arranged close to the gas-insulated switchgear. Thereby, the installation area of the power receiving and transforming equipment can be reduced.

Effects of the Invention

[0018] According to one aspect of the present invention, the transformer can be arranged close to the gas-insulated switchgear.

Brief Description of the Drawings

[0019] [Figure 1] It is a perspective view showing the external configuration of the gas-insulated switchgear according to Embodiment 1 of the present invention. [Figure 2] It is a side view showing the external configuration of the above gas-insulated switchgear. [Figure 3] It is a single-line connection diagram showing the circuit configuration of the above gas-insulated switchgear. [Figure 4] It is a side view showing the external configuration of the power receiving and transforming equipment including the above gas-insulated switchgear. [Figure 5] It is a plan view showing the external configuration of the above power receiving and transforming equipment. [Figure 6] It is a side view showing the external configuration of the above gas-insulated switchgear according to a modification of Embodiment 1. [Figure 7] It is a perspective view showing the external configuration of the gas-insulated switchgear according to Embodiment 2 of the present invention. [Figure 8] It is a side view showing the external configuration of the gas-insulated switchgear according to a modification of Embodiment 2. [Figure 9] It is a single-line connection diagram showing the circuit configuration of the gas-insulated switchgear of Embodiment 2.

Modes for Carrying Out the Invention

[0020] [Embodiment 1] One embodiment of the present invention will be described in detail below.

[0021] Figure 1 is a perspective view showing the external configuration of the gas-insulated switchgear 101 according to Embodiment 1. Figure 2 is a side view showing the external configuration of the gas-insulated switchgear 101. Figure 3 is a single-line diagram showing the circuit configuration of the gas-insulated switchgear 101. Figure 4 is a side view showing the external configuration of the power receiving and transforming equipment 300 including the gas-insulated switchgear 101. Figure 5 is a plan view showing the external configuration of the power receiving and transforming equipment 300. Figure 6 is a side view showing the external configuration of the gas-insulated switchgear 101 according to a modified example of Embodiment 1.

[0022] As shown in Figures 1 to 3, the gas-insulated switchgear 101 mainly comprises a current transformer CT, a cable head CHD, a power receiving unit 1, a busbar room 2, a transformer unit 3, and a connection unit 4. The power receiving unit 1 has a first unit 11 and a second unit 12. The current transformer CT measures the current flowing through the line L. The ends of the cables of the line L are connected to the cable head CHD.

[0023] The second unit 12, the busbar room 2, and the transformer unit 3 are arranged so as to be stacked vertically. Specifically, the transformer unit 3 is located below (directly below) the busbar room 2, and the second unit 12 is located above (directly above) the busbar room 2. The connection unit 4 is located to the side of the transformer unit 3. The first unit 11 is located above the connection unit 4.

[0024] As shown in Figures 1 and 2, the gas-insulated switchgear 101 comprises an operating box 70, a cable box 80 (omitted in Figure 1), a support frame 90, and a base 100 (omitted in Figure 1).

[0025] The control box 70 houses controls for operating switches and disconnectors located in the second unit 12, the busbar room 2, and the transformer unit 3. The control box 70 is located on the front side of the gas-insulated switchgear 101 for operating the controls and has an openable door on its front. The cable box 80 is a box that houses the current transformer CT and cable head CHD together with the line L, and although not shown in the figure, it has an openable door on its front.

[0026] The support frame 90 is a frame that supports the power receiving unit 1, the busbar room 2, the transformer unit 3, the connection unit 4, and the control box 70. The base 100 is a stand for adjusting the height of the gas-insulated switchgear 101 connected to the transformer 200.

[0027] As shown in Figures 4 and 5, the power receiving and transforming equipment 300 comprises a pair of gas-insulated switchgear 101, a pair of transformers 200, and a power supply and demand metering transformer (hereinafter referred to as "VCT") 400. One pair of gas-insulated switchgear 101 and transformers 200 are connected to each other. One pair of gas-insulated switchgear 101 and transformers 200 is provided as a regularly used device, while the other pair of gas-insulated switchgear 101 and transformers 200 is provided as a backup device.

[0028] The first unit 11 and the second unit 12 of the power receiving unit 1 and the transformer 200 are arranged in a straight line as shown by the dashed line in Figure 5. The transformer 200 is also connected to the gas-insulated switchgear 101 via the connection unit 4.

[0029] The VCT400 is positioned between the second units 12 in a pair of gas-insulated switchgear 101. The VCT400 is also connected to the pair of second units 12.

[0030] Next, we will explain in detail the power receiving unit 1, the busbar room 2, the transformer unit 3, and the connection unit 4.

[0031] The power receiving unit 1 is a unit that opens and closes the connection between the power receiving bus BUS1 and the line L. The power receiving unit 1 has a first unit 11 and a second unit 12.

[0032] The first unit 11 includes a surge arrester LA, a voltage detection device VD, a line-side grounding switch ES1, and a line-side disconnector DS1.

[0033] The voltage detection device VD detects the voltage of the conductor connected to the cable head CHD. The surge arrester LA is installed between the conductor and the ground. The line-side grounding switch ES1 grounds the conductor. One end of the line-side disconnector DS1 is connected to the line L via the cable head CHD. One end of the circuit breaker CB1 is connected to the other end of the line-side disconnector DS1.

[0034] Furthermore, the first unit 11 has a first unit container 20 (container, divided container, first container) that constitutes the outer casing of the first unit 11. The first unit container 20 has a main body 20a, a connecting pipe 20b, and inlet pipes 20c, 20d (inlet sections).

[0035] The main body 20a is cylindrical in shape, and its central axis is oriented vertically. Inside the main body 20a are a surge arrester LA, a voltage detection device VD, a line-side grounding switch ES1, and a line-side disconnector DS1.

[0036] The connecting pipe 20b is provided for connection to the second unit container 30, which will be described later. The connecting pipe 20b is formed as a short pipe on the upper part of the outer circumferential surface of the main body 20a, extending in a direction perpendicular to the center of the main body 20a.

[0037] The service entrance pipes 20c and 20d are provided to draw the line L into the first unit container 20 of the first unit 11. The cable head CHD is attached to the service entrance pipe 20c, but may also be attached to the service entrance pipe 20d, as shown in Figure 6.

[0038] As shown in Figures 1 and 5, the service entrance pipes 20c and 20d are positioned on the side of the first unit 11, i.e., on the outer circumferential surface of the main body 20a, in a position that does not face the transformer 200. For example, the service entrance pipes 20c and 20d are positioned so as to face directions A and B, respectively, perpendicular to the direction in which the transformer 200 is positioned relative to the first unit 11 (the direction in which the dashed line extends in Figure 5). Furthermore, the service entrance pipes 20c and 20d are positioned on opposite sides of the outer circumferential surface of the main body 20a.

[0039] The second unit 12 includes a circuit breaker CB1 and grounding switches ESO1 and ESO2 for circuit breaker inspection. The grounding switches ESO2 and ESO3 are closed when inspecting circuit breaker CB1 to ground both ends of circuit breaker CB1.

[0040] Furthermore, the second unit 12 has a second unit container 30 (container, divided container, second container) that constitutes the outer casing of the second unit 12. The second unit container 30 has a main body 30a, a connecting pipe 30b, and a connecting pipe 30c.

[0041] The main body 30a is cylindrical in shape, with its central axis oriented vertically, and is positioned close to the main body 20a of the first unit container 20 so as to be horizontally aligned with it. Inside the main body 30a are the circuit breaker CB1 and the circuit breaker inspection grounding switches ESO1 and ESO2.

[0042] The connecting pipe 30b is provided for connection to the first unit container 20 described above. The connecting pipe 30b is formed short on the upper part of the outer circumferential surface of the main body 30a, extending in a direction perpendicular to the center of the main body 30a. The connecting pipes 20b and 30b connect to each other, thereby creating communication between the interiors of the main body 20a and 30a. The connecting pipe 30c is a conduit for connecting the main body 30a and the control box 70.

[0043] Busbar room 2 includes a receiving-side busbar BUS1, a transformer-side busbar BUS2, a busbar-side disconnector DS2, and a transformer-side disconnector DS3. The busbar-side disconnector DS2 is located between the receiving-side busbar BUS1 and the circuit breaker CB1 in the second unit 12. The transformer-side disconnector DS3 is located between the transformer-side busbar BUS2 and the circuit breaker CB2 in the transformer unit 3, which will be described later. The receiving-side busbar BUS1 is a busbar that connects one end of the busbar-side disconnector DS2 to the input terminal of the VCT400. The transformer-side busbar BUS2 is a busbar that connects one end of the transformer-side disconnector DS3 to the output terminal of the VCT400.

[0044] Furthermore, the busbar chamber 2 has a busbar container 40 (container) that constitutes the outer casing of the busbar chamber 2. The busbar container 40 has a main body 40a, a connecting pipe 40b, and a connecting pipe 40c.

[0045] The main body 40a is cylindrical in shape, with its central axis oriented vertically and positioned to coincide with the center of the main body 30a of the second unit container 30. The upper end of the main body 40a is joined to the lower end of the main body 30a. Inside the main body 40a are the receiving busbar BUS1 and a portion of the transformer busbar BUS2, as well as the busbar-side disconnector DS2 and the transformer-side disconnector DS3.

[0046] The connecting pipe 40b is a conduit provided for connection to the VCT400. The connecting pipe 40c is a conduit for connecting the main body 40a and the control box 70.

[0047] The transformer unit 3 switches the circuit between the transformer-side busbar BUS2 and the primary side of the transformer 200. The transformer unit 3 includes a circuit breaker CB2 and circuit breaker inspection grounding switches ESO3 and ESO4.

[0048] Circuit breaker CB2 has one end connected to the other end of transformer-side disconnector DS3. Circuit breaker inspection grounding switches ESO3 and ESO4 are closed when circuit breaker CB2 is being inspected to ground both ends of circuit breaker CB2.

[0049] Furthermore, the transformer unit 3 has a transformer unit container 50 (container) that constitutes the outer casing of the transformer unit 3. The transformer unit container 50 has a main body 50a, a connecting pipe 50b, and a connecting pipe 50c.

[0050] The main body 50a is cylindrical in shape, with its central axis oriented vertically and positioned to coincide with the center of the main body 40a of the busbar container 40. The upper end of the main body 50a is joined to the lower end of the main body 40a. Inside the main body 50a are the circuit breaker CB2 and the circuit breaker inspection grounding switches ESO3 and ESO4.

[0051] The connecting pipe 50b is a conduit provided for connecting to the connection unit 4. The connecting pipe 50c is a conduit for connecting the main body 50a and the control box 70.

[0052] The connection unit 4 has a bushing BS for connecting the transformer unit 3 to the transformer 200. The bushing BS is provided between one end of the circuit breaker CB2 and the transformer 200.

[0053] Furthermore, the connection unit 4 has a connection unit container 60 (container) that constitutes the outer casing of the connection unit 4. The connection unit container 60 is cylindrical in shape, and its central axis is positioned in the direction in which the first unit 11 and the second unit 12 and the transformer 200 are aligned (see Figure 5). One end of the connection unit container 60 is connected to the connecting pipe 50b of the transformer unit container 50. As shown in Figure 4, the other end of the connection unit container 60 is connected to the connection portion 201 of the transformer 200. A bushing BS is housed inside the connection unit container 60.

[0054] The first unit container 20, the second unit container 30, the busbar container 40, the transformer unit container 50, and the connecting unit container 60 are filled with insulating gas. Furthermore, the first unit container 20, the second unit container 30, the busbar container 40, the transformer unit container 50, and the connecting unit container 60 are isolated from each other to prevent the insulating gas from flowing between them. The insulating gas used is one that has a low environmental impact and low insulating performance. Specifically, dry air, G-cube, nitrogen gas, etc., are used as insulating gases.

[0055] In the gas-insulated switchgear 101 configured as described above, the first unit 11 of the power receiving unit 1 has service entrance pipes 20c and 20d. The service entrance pipes 20c and 20d are positioned on the side of the first unit 11 in a location that does not face the transformer 200.

[0056] According to the above configuration, the service entrance pipes 20c and 20d do not protrude on the side of the gas-insulated switchgear 101 where the transformer 200 is located. As a result, the service entrance pipes 20c and 20d do not obstruct the connection of the transformer 200 to the gas-insulated switchgear 101. Therefore, the transformer 200 can be placed close to the gas-insulated switchgear 101. Thus, the installation area of ​​the power receiving and transforming equipment 300 can be reduced.

[0057] In particular, the service entrance pipes 20c and 20d are positioned so as to be perpendicular to the direction in which the transformer 200 is positioned relative to the first unit.

[0058] According to the above configuration, the service entrance pipes 20c and 20d can be positioned opposite each other on the side surface of the first unit 11, i.e., the outer circumferential surface of the main body 20a. This allows either the service entrance pipe 20c or 20d to be appropriately selected and used depending on the usage conditions of the gas-insulated switchgear 101.

[0059] Furthermore, the container forming the outer casing of the power receiving unit 1 is divided into two (or more) first unit containers 20 and second unit containers 30.

[0060] As described above, the power receiving unit 1 has numerous components, including a surge arrester LA, a voltage detector VD, a line-side grounding switch ES1, a line-side disconnector DS1, a circuit breaker CB1, and circuit breaker inspection grounding switches ESO1 and ESO2. Therefore, in order to ensure the insulation of each component, conventional gas-insulated switchgear uses insulating gases such as SF6 gas, which have high insulating performance. However, such insulating gases are generally greenhouse gases and have a high environmental impact. In contrast, insulating gases with a low environmental impact have low insulating performance, so if such insulating gases are used in conventional gas-insulated switchgear, it is difficult to place the above components in close proximity.

[0061] According to the above configuration, the equipment constituting the power receiving unit 1 can be individually arranged in the divided first unit container 20 and second unit container 30 according to their functions. This ensures sufficient insulation distance between the equipment. Therefore, insulating gases with low insulation performance and environmental impact can be used.

[0062] Furthermore, the inlet pipes 20c and 20d are located on the side surface of the first unit container 20, that is, on the outer circumferential surface of the main body 20a.

[0063] According to the above configuration, the space above the connection unit 4 can be used for bringing in the line L via the inlet pipes 20c and 20d. This makes it possible to effectively utilize the limited space where the gas-insulated switchgear 101 is installed.

[0064] The substation equipment 300 is equipped with a gas-insulated switchgear 101 configured as described above. This allows the transformer 200 to be placed in close proximity to the gas-insulated switchgear 101. Therefore, the installation area of ​​the substation equipment 300 can be reduced.

[0065] [Embodiment 2] Other embodiments of the present invention will be described below. For the sake of convenience, components having the same function as those described in Embodiment 1 will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0066] Figure 7 is a perspective view showing the external configuration of the gas-insulated switchgear 102 according to Embodiment 2. Figure 8 is a side view showing the external configuration of the gas-insulated switchgear 102 according to a modified example of Embodiment 2. Figure 9 is a single-line diagram showing the circuit configuration of the gas-insulated switchgear 102 of Embodiment 2.

[0067] As shown in Figures 7 to 9, the gas-insulated switchgear 102, like the gas-insulated switchgear 101 described above, comprises a power receiving unit 1, a busbar room 2, a transformer unit 3, and a connection unit 4 as its main components, as well as an operation box 70, a support frame 90, and a base 100. Furthermore, the gas-insulated switchgear 102 replaces the current transformer CT and cable head CHD found in the gas-insulated switchgear 101 with a power receiving bushing 10 as one of its main components. Also, the power receiving and transforming equipment 300 described above (see Figures 4 and 5) is equipped with the gas-insulated switchgear 102 instead of the gas-insulated switchgear 101.

[0068] The power receiving bushing 10 is positioned to the side of the first unit container 20 in the direction A described above. The power receiving bushing 10 includes a bushing, a current transformer CT, a main pipe section 10a, and a connecting section 10b. The main pipe section 10a is formed to extend in the vertical direction. The connecting section 10b is a short conduit extending from the lower end of the main pipe section 10a in a direction perpendicular to the center of the main pipe section 10a. The connecting section 10b is connected to the inlet pipe 20c of the first unit container 20.

[0069] The power receiving bushing 10 may be positioned to the side of the first unit container 20 in the direction B described above. In such a power receiving bushing 10 configuration, as shown in Figure 8, the connection portion 10b is connected to the service entrance pipe 20d.

[0070] In the gas-insulated switchgear 102 configured as described above, the power receiving bushing 10 is connected to either one of the service entrance pipes 20c or 20d. This prevents the power receiving bushing 10 from interfering with the placement of the transformer 200. Therefore, similar to the gas-insulated switchgear 101 of Embodiment 1, the transformer 200 can be placed close to the gas-insulated switchgear 102. Thus, the installation area of ​​the power receiving and transforming equipment 300 can be reduced.

[0071] Furthermore, the service entrance pipes 20c and 20d have a structure that can be used in both cases: when the line L is a cable that is brought in via a cable head CHD (cable entrance), as in the gas-insulated switchgear 101 of Embodiment 1; and when the line L is an overhead line that is brought in via a bushing BUSH (bushing entrance), as in the gas-insulated switchgear 102 of this embodiment.

[0072] In the gas-insulated switchgear described in Patent Document 1, when a cable is brought in, the power receiving unit having the incoming section is positioned lower and the transformer unit having the transformer connection is positioned upper so that the incoming section does not interfere with the transformer connection section connected to the transformer. Furthermore, in the gas-insulated switchgear, when a bushing is brought in, the power receiving unit is positioned upper and the transformer unit is positioned lower so that the incoming section is close to the overhead line.

[0073] Thus, in this gas-insulated switchgear, the receiving unit and the transformer unit are positioned in opposite locations depending on whether a cable or bushing is used. Therefore, the components of the receiving unit and the transformer unit cannot be shared between the two cases. This not only increases the number of parts, but also creates problems because the structure of the gas-insulated switchgear differs depending on the connection method, requiring separate designs and manufacturing processes.

[0074] In contrast, as described above, since the service entrance pipes 20c and 20d have a structure that can be used for both cable entrances and bushing entrances, the same service entrance pipes 20c and 20d can be used even if the entrance configuration of the line L is different. This eliminates the need to change the placement of the power receiving unit and transformer unit depending on the entrance configuration. Therefore, the equipment constituting the power receiving unit and the equipment constituting the transformer unit can be standardized between cable entrances and bushing entrances. Consequently, the power receiving unit 1 and the transformer unit 3 can be placed in the same location regardless of the entrance configuration. Thus, the design, manufacturing process, etc., of gas-insulated switchgear with different entrance configurations can be standardized.

[0075] Furthermore, the power receiving bushing 10 can be connected to the gas-insulated switchgear 102 via the shortest possible route. This allows for miniaturization of the power receiving bushing 10.

[0076] [Additional Notes] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Furthermore, embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included within the technical scope of the present invention. [Explanation of Symbols]

[0077] 1 Power receiving unit 2 Busbar room 3 Transformer Unit 4 Connection Units 20. First unit container (container, first container) 20a Main body (side view) 30. Second unit container (container, second container) 40 Bus bar container (container) 50 Transformer unit container (container) 60 Connection unit container (container) 20c, 20d Service entrance pipe (service entrance section) 101,102 Gas-insulated switchgear 200 transformer 300 Power receiving and transforming equipment BUSH CHD Cable Head L track

Claims

1. A busbar room having a power receiving busbar and a transformer busbar, A transformer unit is located below the busbar chamber and opens and closes the transformer-side busbar and the primary side of the transformer. A connecting unit is positioned to the side of the transformer unit and connects the transformer unit and the transformer, The system includes a power receiving unit positioned above the busbar chamber and above the connection unit, which opens and closes the connection between the power receiving busbar and the line, The power receiving unit has a pull-in section for drawing in the line, The gas-insulated switchgear is characterized in that the incoming section is located above the connection unit, on the side of the power receiving unit, in a position that does not face the transformer.

2. The gas-insulated switchgear according to claim 1, characterized in that the incoming section is positioned so as to face a direction perpendicular to the direction in which the transformer is positioned relative to the power receiving unit.

3. The gas-insulated switchgear according to claim 1, characterized in that the draw-in section has a structure that can be used in both cases: when the line is a cable drawn in via a cable head and when the line is an overhead line drawn in via a bushing.

4. The busbar chamber, the power receiving unit, the transformer unit, and the connection unit each have a separate container forming their outer casing, and an insulating gas is sealed inside each container. The gas-insulated switchgear according to claim 1, characterized in that the container forming the outer casing of the power receiving unit is divided into a plurality of divided containers.

5. The aforementioned divided containers are a first container and a second container, The first container is placed on top of the busbar chamber, The second container is positioned above the connecting unit, The gas-insulated switchgear according to claim 4, characterized in that the draw-in portion is located on the side surface of the second container.

6. A gas-insulated switchgear according to any one of claims 1 to 5, The transformer connected to the transformer unit of the gas-insulated switchgear, A power receiving and transforming equipment characterized by comprising a power supply and demand metering transformer connected to the power receiving bus and the transformer bus.

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