JP2019110261A - Gas insulation stationary induction electrical machine - Google Patents

Abstract

To provide a gas insulation stationary induction electrical machine capable of reducing a layout dimension and a pressure loss.SOLUTION: A gas insulation stationary induction electrical machine includes: a tank; a separation plate; a machine main body part; a guide plate; and a cooler. In the tank, an insulation gas is sealed in an inner space. The separation plate is installed in the inner space, and divides the inner space into a lower space and an upper space. The machine main body part is housed in the inner space. The guide plate is installed in a side direction of the machine main body part so as to separate a gap from an inner surface in the tank in the inner space. The cooler is installed in the gap. The insulation gas is flown to the lower space after flowing into the gap from the upper space and cooling by the cooler. By circulating the insulation gas from the lower space to the upper space through a main body part flow channel, the machine main body part can be cooled.SELECTED DRAWING: Figure 1

Description

  Embodiments of the present invention relate to gas-insulated stationary inductive electrical devices.

  In urban areas where the population is dense, it is difficult to secure the large land area required for construction of the substation, and it is necessary to preserve the landscape. Therefore, many substations are built underground in urban areas.

  In underground substations, gas-insulated stationary induction electric devices (gas-insulated transformers, gas-insulated reactors, etc.) using insulating gas are applied. By using gas-insulated stationary induction electrical equipment instead of oil-filled stationary induction electrical equipment using insulating oil, installation of the conservator is not required, so the height of the transformer room is lowered to reduce the drilling depth. It becomes possible to reduce. Moreover, since it can be connected to the gas-insulated switchgear without passing through the fire wall, the layout size of the transformer room can be reduced. Along with this, the construction cost of the substation can be reduced.

JP-A-62-205609 JP 2011-82414 A JP 2012-119398

  FIG. 7 is a cross-sectional view showing the main parts of a gas-insulated static induction device according to the related art. In FIG. 7, the cross section of the front (xz plane) is shown, and the vertical direction is the vertical direction z. The direction perpendicular to the paper is the first horizontal direction y, and the lateral direction is the vertical direction z and the second horizontal direction x orthogonal to the first horizontal direction y. In FIG. 7, the flow of the insulating gas is indicated by thick solid arrows.

  As shown in FIG. 7, the gas-insulated stationary induction electric device 1J includes a tank 10, a device body 20, a cooler 30, and a blower 40 (blower). Each part which comprises the gas insulation stationary induction electric equipment 1J is demonstrated one by one.

  In the gas-insulated stationary induction machine 1J, the tank 10 is, for example, a cylindrical pressure vessel, and the tube axis is disposed along the first horizontal direction y. The tank 10 has an internal space SP in which an insulating gas is sealed. The tank 10 accommodates the device body 20 in the internal space SP. A support 11 is installed at the bottom of the internal space SP of the tank 10, and the support 11 supports the device body 20. Further, in the internal space SP of the tank 10, a partition plate 12 is installed. The partition plate 12 is disposed along the horizontal plane (xy plane) in the internal space SP, and divides the internal space SP into a lower space SP1 and an upper space SP2. A gas supply port K1 is formed on the side portion of the lower space SP1, and a gas discharge port K2 is formed on the side portion of the upper space SP2.

  In the device body 20, a winding 22 is provided around an iron core 21. In the device main body 20, the iron core 21 is installed such that the central axis of the legs is along the vertical direction z, the clamp 23b is installed at the upper end (upper yoke), and the lower end (lower The clamp 23a is installed on iron). The iron core 21 is supported by the support 11 via a clamp 23a at the lower end. The winding 22 is interposed between the clamp 23b at the upper end and the clamp 23a at the lower end. The windings 22 are cylindrical, and a plurality of the windings 22 are coaxially attached to the legs of the iron core 21. Here, the winding 22 is provided inside as a low voltage winding, and the winding 22 is provided outside as a high voltage winding. The apparatus main body portion 20 is internally formed with a main body portion flow path (not shown) through which the insulating gas flows. The main body flow path is provided, for example, inside the iron core 21, between the iron core 21 and the winding 22, and between the plurality of windings 22, and insulating gas flows along the vertical direction z.

  Both the cooler 30 and the blower 40 are installed outside the tank 10. Here, one end of the gas pipe P1 is connected to the gas supply port K1, and the other end of the gas pipe P1 is connected to the outlet end of the blower 40. Further, one end of the gas pipe P2 is connected to the gas discharge port K2, and the inlet end of the cooler 30 is connected to the other end of the gas pipe P2. The outlet end of the cooler 30 and the inlet end of the blower 40 are connected. The cooler 30 is, for example, a water-cooled cooler, and a cooling medium such as cooling water flows inside a cooler pipe (not shown).

  The flow of the insulating gas in the above-described gas-insulated stationary induction electric device 1J will be described.

  In the internal space SP of the tank 10, the insulating gas flows from the lower space SP1 to the upper space SP2 through the device body 20, thereby cooling the device body 20. Specifically, the insulating gas flows through the main body flow passage (not shown) formed along the vertical direction z in the device main body 20 and ascends. As a result, the temperatures of the iron core 21 and the winding 22 decrease, and the temperature of the insulating gas rises.

  Then, the high-temperature insulating gas that has flowed to the upper space SP2 of the tank 10 flows through the gas pipe P2 via the gas outlet K2 and is cooled by the cooler 30. In the cooler 30, the temperature of the insulating gas is lowered by heat exchange between the high temperature insulating gas and the low temperature cooling medium. Thereafter, the low temperature insulating gas cooled by the cooler 30 is sent to the gas pipe P1 by the blower 40, and flows into the lower space SP1 of the tank 10 through the gas supply port K1. Then, the low temperature insulating gas cools the device body 20 as described above. As described above, in the gas-insulated stationary induction electric device 1J, the insulating gas circulates the tank 10, the cooler 30, and the blower 40 sequentially.

  The site area required for the installation of the gas-insulated stationary induction electrical apparatus 1J is determined by the layout size in consideration of the arrangement of each component (tank 10, cooler 30, blower 40, gas pipes P1, P2, etc.). It is desirable to further reduce the layout dimensions of the gas-insulated stationary induction electrical device 1J in order to further reduce the overall cost required for the construction of the underground substation.

  Furthermore, in the gas-insulated stationary induction electric device 1J, pressure loss may occur in the gas pipes P1, P2.

  The problem to be solved by the present invention is to provide a gas-insulated stationary induction electric device capable of reducing the layout size and reducing the pressure loss.

  The gas-insulated stationary induction electric apparatus of the embodiment has a tank, a partition plate, an apparatus body, a guide plate, and a cooler. In the tank, an insulating gas is enclosed in the internal space. The partition plate is installed in the inner space, and divides the inner space into a lower space and an upper space. The device body is accommodated in the internal space, and a winding is provided on the iron core. The guide plate is disposed on the side of the device body to separate the air gap from the inner surface of the tank in the internal space. The cooler is installed in the air gap. Here, in the device main body portion, a main body flow path communicating between the lower space and the upper space is formed inside. The insulating gas flows from the upper space into the air gap and is cooled by the cooler, and then flows out to the lower space, and circulates from the lower space to the upper space through the main body flow path, whereby the device body portion Cool down.

FIG. 1 is a cross-sectional view showing the main parts of the gas-insulated static induction device according to the first embodiment. FIG. 2 is a cross-sectional view showing the main parts of the gas-insulated static induction device according to the second embodiment. FIG. 3 is a cross-sectional view showing the main parts of a gas-insulated static induction device according to a third embodiment. FIG. 4A is a view showing the main parts of a gas-insulated static induction device according to a fourth embodiment. FIG. 4B is a view showing the main part of the gas-insulated static induction device according to the fourth embodiment. FIG. 5 is a view showing the main part of a gas-insulated static induction electrical device according to a fifth embodiment. FIG. 6 is a view showing a modified example of the gas-insulated stationary induction electric device according to the embodiment. FIG. 7 is a cross-sectional view showing the main parts of a gas-insulated static induction device according to the related art.

First Embodiment
FIG. 1 is a cross-sectional view showing the main part of the gas-insulated static induction device 1 according to the first embodiment. FIG. 1 shows a cross section of the front (xz plane) as in FIG.

  As shown in FIG. 1, in the present embodiment, the gas-insulated static induction device 1 does not include the blower 40 and the gas pipes P1 and P2, unlike the case of the related art described above (see FIG. 7), and A plate 15 is provided. And, the installation place of the cooler 30 is different. The present embodiment is the same as the case of the related art described above except for the above point, and therefore the description will be omitted as appropriate.

  In the gas-insulated stationary induction electrical apparatus 1 of the present embodiment, the guide plate 15 is spaced from the inner surface of the tank 10 in the direction of the inner space SP from the inner surface of the tank 10 in the inner space SP of the tank 10. It has been set up. The guide plate 15 has an arc shape in cross section, and is arranged such that the gap F1 has a constant width. Here, the guide plates 15 are a pair and face each other so as to sandwich the device body 20 and the partition plate 12 in the second horizontal direction x. The pair of guide plates 15 is disposed symmetrically with respect to the central axis of the leg portion of the iron core 21.

  Specifically, one guide plate 15a (first guide plate) is disposed so as to separate the gap F1a (first gap) from the inner surface of the tank 10 on one side (right side in FIG. 1) of the device body 20 ) Is installed. In addition, the other guide plate 15b (second guide plate) is installed so as to separate the air gap F1b (second air gap) from the inner surface of the tank 10 on the other side of the device body 20 (left side in FIG. 1). It is done.

  The cooler 30 is installed in the air gap F1 in the internal space SP of the tank 10. Here, the cooler 30 is a pair and is installed in each of the pair of air gaps F1. The pair of coolers 30 is disposed symmetrically with respect to the central axis of the legs of the iron core 21.

  Specifically, one cooler 30a (first cooler) is installed in a gap F1a located on one side (right side) of the device body 20. Further, the other cooler 30 b (second cooler) is installed in the air gap F 1 b located on the other side (left side) of the device body 20.

  The cooler 30 includes a plurality of cooler pipes 300. The plurality of cooler pipes 300 are arranged such that the tube axis is along the first horizontal direction y, and a cooling medium such as cooling water having a temperature lower than that of the insulating gas flows inside. In the cooler 30, heat exchange is performed between the insulating gas and the cooling medium flowing through the cooler piping 300, whereby the insulating gas is cooled.

  The flow of the insulating gas in the gas-insulated stationary induction electric device 1 of the present embodiment will be described.

  In the present embodiment, the insulating gas flows from the upper space SP2 into the air gap F1 in the internal space SP of the tank 10. Then, the insulating gas flowing into the air gap F1 is cooled by the cooler 30. In the cooler 30, the temperature of the insulating gas is lowered by heat exchange between the insulating gas and a cooling medium (not shown) whose temperature is lower than that of the insulating gas. Thereafter, the low-temperature insulating gas cooled by the cooler 30 flows out to the lower space SP1.

  Then, the insulating gas ascends from the lower space SP1 to the upper space SP2 through the main body flow path (not shown) formed in the device main body 20. At this time, heat exchange occurs between the high temperature iron core 21 and the low temperature insulating gas and between the high temperature winding 22 and the low temperature insulating gas in the device body 20. As a result, the temperature of the device body 20 is reduced by natural cooling, and the temperature of the insulating gas is increased. The high-temperature insulating gas raised to the upper space SP2 again flows into the air gap F1 and is cooled by the cooler 30.

  As described above, in the gas-insulated stationary induction electrical device 1, the insulating gas circulates in the inner space SP of the tank 10 through the upper space SP2, the air gap F1, and the lower space SP1. And when the insulating gas cooled by the cooler 30 installed in the space F1 rises from the lower space SP1 to the upper space SP2 by flowing through the inside of the device body 20, the device body 20 is cooled. .

  As described above, the cooler 30 is installed in the internal space SP of the tank 10 in the gas-insulated static induction device 1 of the present embodiment. Here, the cooler 30 is installed in a gap F1 located between the inner surface of the tank 10 and the guide plate 15. In the present embodiment, the cooler 30 is not installed outside the tank 10. Therefore, in the present embodiment, as in the case of the related art, the gas pipes P1 and P2 (see FIG. 7) in which the insulating gas flows from the external cooler 30 to the inside of the tank 10 are unnecessary.

  Therefore, in the present embodiment, the layout dimensions required for the installation of the gas-insulated static induction device 1 can be reduced. And, along with this, it is possible to further reduce the overall cost required for the construction of the substation. Further, in the present embodiment, since the pressure loss due to the gas pipes P1, P2 does not occur, the pressure loss can be reduced.

Second Embodiment
FIG. 2 is a cross-sectional view showing the main parts of a gas-insulated static induction device 1b according to a second embodiment. FIG. 2 shows a cross section of the front (xz plane) as in FIG.

  As shown in FIG. 2, in the present embodiment, the gas-insulated static induction device 1 b includes a blower 40 unlike the case of the first embodiment described above (see FIG. 1). Since the present embodiment is the same as the case of the first embodiment except for the above point, the description will be appropriately omitted.

  In the present embodiment, as shown in FIG. 2, the blower 40 is installed in the internal space SP so as to send the insulating gas from the air gap F1 to the lower space SP1. Here, the blower 40 is a pair, and is installed at the lower end of each of the pair of gaps F1. The pair of blowers 40 is disposed symmetrically with respect to the central axis of the leg portion of the iron core 21.

  Specifically, one blower 40a is installed to send the insulating gas from the air gap F1a located on one side (right side) of the device body 20 to the lower space SP1. Further, the other blower 40b is installed so as to send the insulating gas from the space F1b located on the other side (left side) of the device body 20 to the lower space SP1.

  The flow of the insulating gas in the gas-insulated stationary induction electric device 1b of the present embodiment will be described.

  In the present embodiment, after being cooled by the cooler 30 in the air gap F1, the insulating gas is sent to the lower space SP1 by the blower 40 unlike the case of the first embodiment.

  Then, the insulating gas ascends from the lower space SP1 to the upper space SP2 through the main body flow path (not shown) formed in the device main body 20, as in the first embodiment. As a result, the device body 20 is cooled and the temperature of the insulating gas rises.

  As described above, in the present embodiment, since the blower 40 is provided, the flow velocity when the insulating gas circulates in the internal space SP of the tank 10 is increased. For this reason, in the present embodiment, in addition to the effects similar to the above-described first embodiment, the effect of improving the cooling efficiency of the device body 20 can be exhibited.

  Besides, in the present embodiment, since the blower 40 is disposed at the lower part of the tank 10, the worker can easily perform the maintenance work of the blower 40.

Third Embodiment
FIG. 3 is a cross-sectional view showing the main parts of a gas-insulated static induction device 1c according to a third embodiment. FIG. 3 shows a cross section of the front (xz plane) as in FIG.

  As shown in FIG. 3, in the present embodiment, the installation position of the blower 40 of the gas-insulated static induction device 1c is different from that of the second embodiment (see FIG. 2). Since this embodiment is the same as the case of the second embodiment except for the above point, the description will be omitted as appropriate.

  In the present embodiment, the blowers 40 are a pair and are disposed at the upper ends of the pair of gaps F1. The pair of blowers 40 is installed in the internal space SP so as to send the insulating gas from the upper space SP2 to the air gap F1.

  Specifically, one blower 40a is installed to supply the insulating gas from the upper space SP2 to the gap F1a located on one side (right side) of the device body 20. Further, the other blower 40b is installed so as to send the insulating gas from the upper space SP2 to the air gap F1b located on the other side (left side) of the device body 20.

  The flow of the insulating gas in the gas-insulated stationary induction electric device 1c of the present embodiment will be described.

  In the present embodiment, the insulating gas is cooled by the cooler 30 after being sent to the air gap F1 by the blower 40. Thereafter, the insulating gas cooled by the cooler 30 rises from the lower space SP1 to the upper space SP2 through the main body flow path (not shown) formed in the device main body 20. As a result, the device body 20 is cooled and the temperature of the insulating gas rises.

  As described above, in the present embodiment, since the blower 40 is provided, as in the case of the second embodiment, the flow velocity when the insulating gas circulates in the internal space SP of the tank 10 is increased. For this reason, in the present embodiment, the effect of improving the cooling efficiency of the device body 20 can be achieved.

Fourth Embodiment
FIG. 4A and FIG. 4B are figures which show the principal part of gas-insulated stationary induction electric equipment 1d concerning a 4th embodiment. FIG. 4A shows the side surface (xz plane) of the gas-insulated static induction machine 1d, where the vertical direction is the vertical direction z and the horizontal direction is the first horizontal direction y, which is perpendicular to the paper surface. The direction is the second horizontal direction x. FIG. 4B is an enlarged view of the side surface of the cooler 30 (30a) constituting the gas-insulated static induction electrical device 1d, and the flow of the cooling medium in the cooler 30 is indicated by the thick broken arrow.

  As shown to FIG. 4A and FIG. 4B, the gas-insulated stationary induction electric equipment 1d of this embodiment differs in the structure of the cooler 30 from the case of said 1st Embodiment (refer FIG. 1). Since the present embodiment is the same as the case of the first embodiment except for the above point, the description will be appropriately omitted.

  In the present embodiment, the cooler 30 is not a plurality of cooler pipes 300 but a single cooler pipe 300, and has one refrigerant supply port 300A and one refrigerant discharge port 300B. In the cooler pipe 300, the cooling medium flows into the refrigerant supply port 300A, and the cooling medium flows out from the refrigerant discharge port 300B located above the refrigerant supply port 300A in the vertical direction z.

  Here, the cooler piping 300 is configured by a linear piping portion 301 and an arc-shaped piping portion 302. In the cooler piping 300, the linear piping portion 301 is a plurality of linear tubular bodies extending in the first horizontal direction y. The plurality of linear pipes 301 are arranged along the inner surface of the tank 10 in the vertical direction z. The arc-shaped piping portion 302 is a tubular body bent in an arc shape, and a plurality of arc-shaped piping portions 302 are provided so as to connect between the pair of linear piping portions 301. For example, when the cooling medium flows from the refrigerant supply port 300A toward the refrigerant discharge port 300B in the cooler pipe 300, the plurality of arc-shaped pipe sections 302 have one end side and the other end in the first horizontal direction y. The pair of straight piping parts 301 are connected so as to progress alternately toward each of the end sides.

  The cooler piping 300 is configured such that the insulating gas flowing outside is sufficiently cooled by the cooling medium flowing inside. In addition, the structure of the above-mentioned single cooler piping 300 is an illustration, and may employ | adopt another structure provided with a sufficient cooling function.

  As described above, in the cooler 30 according to the present embodiment, since the cooler pipe 300 is single, the number of the refrigerant supply port 300A is one and the number of the refrigerant outlet 300B is one. For this reason, it is possible to reduce the number of sealing portions that seal between the pipe connected to the refrigerant supply port 300A and the pipe connected to the refrigerant discharge port 300B and the tank 10. As a result, in the present embodiment, it is possible to reduce the risk that the insulating gas sealed in the tank 10 leaks from the seal portion to the outside.

  In addition to this, the cooler piping 300 of the present embodiment does not have a configuration in which the inlet side and the outlet side of the plurality of linear piping portions 301 are connected by a common piping (not shown). For this reason, in cooler piping 300 of this embodiment, since there are few welding parts, the risk that cooling media, such as cooling water which flows through cooler piping 300, leak outside can be reduced.

Fifth Embodiment
FIG. 5 is a view showing the main part of a gas-insulated static induction device 1e according to a fifth embodiment. FIG. 5 shows the upper surface (xy plane) of the gas-insulated stationary induction electric device 1e, where the direction perpendicular to the paper is the vertical direction z, and the horizontal direction is the first horizontal direction y. The direction is the second horizontal direction x.

  As shown in FIG. 5, in the gas-insulated static induction device 1e of the present embodiment, the configuration of the cooler 30 is different from that of the first embodiment (see FIG. 1). Since the present embodiment is the same as the case of the first embodiment except for the above point, the description will be appropriately omitted.

  In the present embodiment, the cooler 30 includes a first cooling unit 31, a second cooling unit 32, and a third cooling unit 33, and each unit is integrally configured.

  In the cooler 30, the first cooling unit 31 and the second cooling unit 32 extend along the first horizontal direction y, and sandwich the device body 20 in the second horizontal direction x. Face to face. Specifically, the first cooling unit 31 and the second cooling unit 32 are interposed between the device body 20 and the inner circumferential surface of the cylindrical portion 101 that constitutes the tank 10. Although not shown in FIG. 5, the first cooling unit 31 is installed in the first gap F1a, and the second cooling unit 32 is installed in the second gap F1b (see FIG. 1). ).

  The third cooling unit 33 is installed on the side of the device body 20 in the first horizontal direction y. Specifically, the third cooling unit 33 is disposed so as to be interposed between the device main body 20 and the inner peripheral surface of the end plate portion 102 closing the end of the cylindrical portion 101 in the tank 10 . That is, the third cooling unit 33 is disposed in a dead space (vacant space) existing between the device body 20 and the end plate portion 102.

  In the present embodiment, the cooler 30 has a single cooler pipe (not shown) and has one refrigerant supply port 300A and one refrigerant discharge port 300B. The refrigerant supply port 300A is provided in the first cooling unit 31, and the refrigerant outlet 300B is provided in the second cooling unit 32. Then, a cooler pipe is provided so as to sequentially communicate the first cooling unit 31, the third cooling unit 33, and the second cooling unit 32.

  In the present embodiment, the cooling medium flows through the first cooling unit 31, the third cooling unit 33, and the second cooling unit 32 sequentially after flowing into the refrigerant supply port 300A. At this time, heat exchange between the cooling medium and the insulating gas is performed in each part. As a result, the temperature of the insulating gas is lowered and the temperature of the cooling medium is raised. Then, the cooling medium whose temperature has risen is discharged from the refrigerant discharge port 300B.

  As described above, the cooler 30 according to the present embodiment includes the first cooling unit 31 installed in the first gap F1a and the second cooling unit 32 installed in the second gap F1b. In addition, the third cooling unit 33 is provided in the dead space between the device body 20 and the end plate portion 102. For this reason, in the present embodiment, since the surface area of the cooler pipe (not shown) constituting the cooler 30 can be increased, the heat exchange between the insulating gas and the cooling medium is efficiently performed.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

  FIG. 6 is a view showing a modified example of the gas-insulated stationary induction electric device according to the embodiment. FIG. 6 shows, in the same way as FIG. 4A, the side (xz plane) of the gas-insulated stationary induction machine.

  As shown in FIG. 6, a viewing window 50 may be provided in the tank 10. The viewing window 50 is made of, for example, glass, and the operator can observe the inside of the tank 10 from the outside through the viewing window 50. Specifically, the position or the like of the malfunction of the device body 20, the leak of the cooler pipe 300, and the like can be searched from the outside, and early repair becomes possible.

  In addition to the above, it is preferable that the cooler piping which comprises the cooler 30 is a double piping. The double pipe includes an inner pipe (not shown) and an outer pipe (not shown) that houses the inner pipe, and the cooling medium flows through the inner pipe. Thereby, the leak of the cooling medium can be effectively prevented.

  In addition to water, the cooling medium used in the cooler 30 is preferably an antifreeze liquid (for example, ethylene glycol) having a freezing point lower than that of water. Thereby, the cooling efficiency can be further enhanced.

1, 1b, 1c, 1d, 1e, 1J: gas-insulated stationary induction electric device, 10: tank, 11: support base, 12: partition plate, 15: guide plate, 15a: first guide plate, 15b: second Guide plate 20, device body portion 21, 21 core, 22 winding: 23a first clamp 23b second clamp 30 cooler 30a first cooler 30b second No. of coolers 31 first cooling part 32 second cooling part 33 third cooling part 40 blower 40a first blower 40b second blower 50 second view window Reference numeral 101: cylindrical portion 102: mirror plate portion 300: cooler pipe 300A: refrigerant supply port 300B: refrigerant discharge port 301: linear pipe portion 302: arc-shaped pipe portion F1: air gap F1a: first Void of 1, F1b: second void, K1: gas supply port, K2: Scan outlet, P1 ... gas piping, P2 ... gas piping, SP ... internal space, SP1 ... the lower space, SP2 ... upper space

Claims (6)

A tank in which an insulating gas is sealed in the internal space;
A partition plate installed in the inner space, which divides the inner space into a lower space and an upper space;
A device main body which is accommodated in the internal space and in which a winding is provided on an iron core;
It has a guide plate installed at a distance from the inner surface of the tank in the direction of the inner space so as to provide an air gap from the inner surface of the tank in the inner space, and a cooler installed inside the air gap.
The insulating gas flows from the upper space into the air gap, passes through the cooler, flows out to the lower space, and is circulated from the upper space to the device body and the upper space in this order. Induction electrical equipment. The apparatus further comprises a blower disposed in the interior space to deliver the insulating gas from the air gap to the lower space.
A gas-insulated stationary induction electric device according to claim 1. The apparatus further comprises a blower disposed in the interior space to deliver the insulating gas from the upper space to the air gap,
A gas-insulated stationary induction electric device according to claim 1. The cooler cools the insulating gas by performing a heat exchange between the insulating gas and the cooling medium flowing through the cooler pipe, the cooler pipe having a single cooling medium through which the cooling medium flows is performed. ,
The gas-insulated stationary induction electric device according to any one of claims 1 to 3. The guide plate is
A first guide plate installed to provide a first gap from the inner surface of the tank on one side of the device body;
A second guide plate installed to provide a second gap from the inner surface of the tank on the other side of the device body,
The cooler is
A first cooling unit installed in the first air gap;
A second cooling unit installed in the second space, and a third cooling unit connected to the first cooling unit and the second cooling unit;
A refrigerant supply port through which the cooling medium flows into the first cooling unit;
The second cooling unit is provided with a refrigerant outlet from which the cooling medium flows out.
A gas-insulated stationary induction electric device according to claim 4. The cooler pipe is a double pipe,
A gas-insulated stationary induction electric device according to claim 4 or 5.

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