JP2010123896A - Stationary induction unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stationary induction unit whose cost is reduced and whose electric characteristics is improved. <P>SOLUTION: Leg cores 1a are clamped with leg core clamping metal fittings 3 and united with a plurality of leg core clamping bands 4. Yokes 1b are arranged in parallel with the stacking direction of the leg cores 1b, clamped with yoke clamping metal fittings 5 having a width equal to the minimum width of the yokes 1b, and united with a plurality of yoke clamping bands 6. Winding 2 inserted into the leg cores 1a, meanwhile, couples winding clamping square type steel pipes 7a and 7b arranged above and below the winding 2, above and below the leg core clamping metal fittings 3, and spacers 8 are arranged between the winding clamping square type steel pipes 7 and the winding 2 and adjusted to clamp them. The winding clamping square type steel pipes 7a and 7b are composed of members having excellent rigidity and small mass. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a static induction electric appliance, and more particularly to a static induction electric appliance having an improved iron core and winding tightening structure.

  In the medium-capacity transformer class, there is a demand for a static induction machine that is lighter and less lossy than the present. Especially in the overseas market, the mass of static induction appliances affects transportation costs, and the evaluation value for losses of static induction appliances is high, and reducing the losses leads to the enhancement of product competitiveness.

  Here, a laminated iron core and a winding tightening structure in a general induction cooling apparatus of a self-cooling system in a winding will be specifically described with reference to FIG. That is, as shown in FIG. 8B, the transformer iron core is constituted by a laminated iron core 1 formed by laminating a plurality of electric iron plates. A portion of the laminated iron core 1 in which the winding 2 is inserted is sandwiched between leg iron fastening fittings 3 disposed on both end surfaces in the lamination direction, and tightened by a plurality of leg iron fastening bands 4. And integrated. Moreover, the yoke 1b which is arrange | positioned at the upper and lower sides of the leg iron 1a, and connects the some leg iron 1a is clamped by the yoke fastening metal fitting 17, and is integrated by the some yoke fastening band 6. FIG.

  Further, the yoke fastening metal fitting 17 having a function of holding the yoke 1b arranged above and below the leg iron 1a and holding the winding 2 coaxially wound around the leg iron 1a is provided with the winding 2 Are arranged outside the upper and lower yokes 1b and connected by the leg iron fastening fitting 3, and winding fastening plates 18 are arranged at several places, and between the winding 2 and the winding fastening plate 18. A spacer 8 is disposed on the surface.

  The yoke fastening bracket 17 and the winding fastening plate 18 connected to the yoke fastening fixture 17 are fixed at the position where the leg fastening fastener 3 is connected. Receives rotational force due to reaction force. In order to suppress this rotational force, the yoke fasteners 17 arranged on both side surfaces in the stacking direction of the yoke 1b are arranged above the yoke 1b in the upper yoke fastener 17a arranged on the upper part of the winding. On the other hand, the lower yoke fastening bracket 17b arranged at the lower part of the winding is connected by the connecting plate 13 on the lower side of the yoke 1b.

  Due to the connection by the connecting plate 13, the yoke fastening bracket 17 has a height at which the connecting plate 13 is arranged, that is, a width up to the end of the maximum yoke width. In order to clamp 1b with equal force, the yoke fastening bracket 17 is configured to cover the minimum width of the yoke 1b. Therefore, in the yoke fastening bracket 17 having both functions of clamping the yoke 1b and the winding 2, the upper yoke fastening bracket 17a is connected to the upper joint from the lower side of the minimum width of the upper yoke. To the uppermost part of the iron, the lower yoke fastening bracket 17b requires a width from the upper side of the minimum width of the lower yoke to the lowermost part of the lower yoke.

  The upper yoke fastening bracket 17a is attached with a hanging ear 14 for lifting a content structure composed of the laminated iron core 1, the winding 2 and a fastening member for sandwiching them. Since the yoke 1b clamped by this is arrange | positioned inside the upper yoke fastening metal fitting 17a, the hanging ear 14 is provided in the outer surface of the yoke 1b.

  Next, a laminated iron core and winding tightening structure in a general induction induction machine of the forced cooling system in the winding will be described with reference to FIG. Note that the same members as those of the static induction electric machine shown in FIG.

  In this static induction appliance of the in-winding forced cooling system, a plurality of cooling medium channels sandwiched between lower yoke fastening members 17b are used as cooling medium flow paths for forcibly cooling the inside of the winding 2 from outside the tank 15 of the static induction appliance. The cooling pipes 16 are arranged on both side surfaces of the yoke 1b integrated with the yoke fastening band 6 in the iron core lamination direction. A cooling pipe support plate 19 is attached to the lower yoke fastening bracket 17b, and the cooling pipe 16 is connected to and supported by the cooling pipe support plate 19.

Further, the yoke fasteners 17 disposed above and below the winding 2 are connected by the leg fasteners 3, and the lower yoke fastener 17 b has an insulating spacer 8 between the cooling pipe 16 and the windings 2. By inserting, the winding 2 is sandwiched through the cooling pipe 16. Further, a hole is formed in the insulating spacer 8 and the cooling pipe 16 at a position where the oil of the winding 2 is taken in, and a flow path for flowing the cooling medium from the cooling pipe 16 to the winding 2 is provided. In such a configuration, the yoke fastening bracket 17 and the cooling pipe 16 are integrated, and have both functions of clamping the yoke and clamping the winding.
JP-A-6-176931

  However, the laminated iron core and the winding tightening structure in the conventional static induction appliance as described above have the following problems. That is, in the yoke fastening bracket 17 having the functions of both the clamping of the yoke and the winding as described above, the yoke is clamped by the connecting plate 13 disposed on the upper portion of the yoke and the iron core. In order to connect the fasteners 17 to each other, the upper yoke fastener 17a is from the lower side of the minimum width of the upper yoke to the top of the upper yoke, and the lower yoke fastener 17b is the minimum width of the lower yoke. From the upper side of the lower yoke to the lowermost portion of the lower yoke, it is necessary to increase the width of the yoke fastener. Further, since the winding fastening plate 17 is provided with a winding fastening plate 18 for receiving the winding 2, and it is necessary to adopt a rib configuration to improve the strength, the large-weight yoke fastening fitting 17 is provided. As a result, the mass of the transformer was increased.

  Further, since the suspension ear 14 is attached to the side surface opposite to the side where the yoke fastening bracket 17 is fixed by the leg iron fastening bracket 3, the reaction force from the winding 2 is applied to the yoke fastening bracket 17. In addition to the rotational force generated by the above, the rotational force received from the suspension ear 14 is generated by lifting, so that it is necessary to increase the rigidity of the connecting plate 13 that suppresses this rotational force, the weight of the connecting plate 13 increases, and the transformer mass increases. It was connected to the factor.

  Further, since the upper yoke fastening bracket 17a is arranged close to the lower winding of the iron core and the lower yoke fitting 17b is arranged closer to the upper winding of the iron core minimum width, the inner winding and the outer winding are arranged. Magnetic flux that is not interlinked with the magnetic flux, that is, leakage magnetic flux, enters the yoke fastening bracket 17 by the amount of magnetic flux that is inversely proportional to the square of the distance from the winding 2, causing loss. Since the loss generated in the yoke clamp 17 is proportional to the square of the width of the yoke clamp 17, both the function of clamping the yoke and the winding of the coil are provided. The wide yoke fastener 17 has increased loss due to leakage magnetic flux.

  The present invention has been proposed in order to solve the above-described problems of the prior art, and an object of the present invention is to provide a static induction device capable of reducing costs and improving electrical characteristics. is there.

  In order to achieve the above object, the present invention provides a leg iron and a yoke made of a laminated iron core in which a plurality of electric iron plates are laminated, and windings are wound around the leg iron. In a static induction device integrated with a bracket and a plurality of leg iron fastening bands, a yoke fastening member that integrates the yoke and a winding fastening member that fastens the winding are separately provided. The yoke fastening member is made of a metal material having a width approximately equal to the minimum width of the yoke, arranged in parallel to the lamination direction of the yoke, and the yoke and the yoke. The iron fastening member is integrated by a plurality of yoke fastening bands.

  Further, the present invention provides a leg iron and a yoke made of a laminated iron core in which a plurality of electric iron plates are laminated, and a winding is wound around the leg iron, and the leg iron includes a leg iron fastening bracket and a plurality of legs. In a static induction device integrated with an iron fastening band, a yoke fastening member that integrates the yoke and a winding fastening member that fastens the winding are configured separately, and the joint The iron fastening member is made of an insulating material arranged in parallel with the yoke stacking direction and having a width approximately equal to the minimum width of the yoke, and the yoke and the yoke fastening member are It is characterized by being integrated by a plurality of yoke fastening bands.

  According to the present invention having the above-described configuration, the yoke is clamped by the yoke clamping member, and separately from this, the winding is clamped by the winding clamping member. A yoke fastening member intended only for holding iron can be reduced to the minimum width of the yoke. Moreover, when using a metal material as a yoke fastening member, plate | board thickness can be made small compared with the past. Moreover, when using an insulating material as a yoke fastening member, while being able to aim at reduction of mass compared with the past, the loss by the leakage magnetic flux which arises in a yoke fastening member can be aimed at.

  According to the present invention, the material cost and the transportation cost due to weight reduction can be obtained by dividing the function of holding the yoke by the yoke fastening member of the laminated core and the function of holding the winding by the winding fastening member. It is possible to provide a static induction electric appliance that can improve electrical characteristics by reducing loss due to leakage magnetic flux at the same time.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a static induction apparatus according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the member same as the conventional type shown in FIG.8 and FIG.9, and description is abbreviate | omitted.

(1) Configuration of the First Embodiment (1-1) The feature of this embodiment is that the yoke 1b is clamped by the yoke fastening bracket 5 (corresponding to the yoke fastening member in the claims), and the winding fastening is performed. The configuration is such that the winding is sandwiched by the angled steel pipe 7 (corresponding to the winding fastening member in the claims), and the two functions that have been integrated in the past are divided.

  That is, in the present embodiment, as shown in FIG. 1, the leg iron 1 a is sandwiched by the leg iron fastening fitting 3 and integrated by a plurality of leg iron fastening bands 4. Further, the yoke 1b is arranged in parallel with the lamination direction of the yoke 1b, and is clamped by the yoke fastening metal 5 having the same width as the minimum width of the yoke 1b. It is integrated.

  On the other hand, the winding 2 inserted into the leg iron 1a connects the winding tightening square steel pipes 7a, 7b arranged above and below the winding 2 at the top and bottom of the leg iron fastening bracket 3, and A spacer 8 is disposed between the wire clamped square steel pipe 7 and the winding 2 and is clamped by adjusting the spacer 8. In addition, this winding fastening square steel pipe 7a, 7b is comprised from the member which is excellent in rigidity and small in mass.

  Further, a reinforcing plate is attached to the winding tightening square steel pipe 7 as a countermeasure against a load generated in the square steel pipe 7 by lifting or winding tightening. That is, in order to suppress the rotational force due to the reaction force of the winding 2 and the vertical deflection during transportation and to integrate the contents structure, the upper coiled rectangular steel pipes 7a are connected to the upper rectangular steel pipe. Connected by a connecting member 9, the lower winding tightening square steel pipes 7 b are connected by a lower square steel pipe connecting member 10.

(1-2) Action / Effect In the static induction appliance of the present embodiment configured as described above, the yoke 1b is sandwiched by the yoke fastening bracket 5, and separately from this, the winding fastening square steel pipe Since the winding 2 is sandwiched between the yokes 7, the yoke fastening bracket 5 intended only for clamping the yoke 1 b can be reduced to the minimum width of the yoke 1 b. Moreover, when using a metal plate as the yoke fastening metal fitting 5, it becomes possible to make plate | board thickness small compared with the past.

  As described above, according to the present embodiment, the clamping of the yoke 1b by the yoke fastening bracket 5 and the function for clamping the winding 2 are divided, and the yoke fastening is reduced to the minimum width of the yoke 1b. By holding the yoke 1b with the metal fitting 5 and holding the winding 2 with the winding-tightened square steel pipe 7 which is excellent in rigidity and has a small mass, the mass can be reduced as compared with the conventional structure. In addition, by reducing the thickness of the yoke fastener 5, loss due to leakage magnetic flux generated in the yoke fastener 5 can be reduced, thereby reducing costs such as material costs and transportation costs due to weight reduction. In addition, it is possible to provide a static induction electric appliance with improved electrical characteristics.

(2) Second Embodiment This embodiment is a modification of the first embodiment, and instead of the yoke fastening metal 5 used in the first embodiment, a yoke fastening insulating plate made of an insulator is used. 11 is used. That is, as shown in FIG. 2, as a fastening member for the yoke 1b, a yoke fastening insulating plate 11 that is arranged in parallel to the lamination direction of the yoke 1b and has a width that is the same as the minimum width of the yoke 1b. Used, the yoke fastening insulator 11 is integrated by fastening together with the yoke 1b by a plurality of yoke fastening bands 6.

  In the present embodiment configured as described above, the mass of the yoke 1b can be reduced by tightening the yoke 1b using the yoke fastening insulator 11 instead of the yoke fastening bracket 5. In addition, it is possible to reduce loss due to leakage magnetic flux generated in the yoke fastening bracket. As a result, since there is no loss generated in the yoke fastening member, it is possible to provide a static induction appliance with improved electrical characteristics with low loss.

(3) Configuration of Third Embodiment (3-1) This embodiment is a modification of the second embodiment, and the yoke tightening shown in the second embodiment as a tightening member of the yoke 1b. The insulating plate 11 is used, and this yoke fastening insulator 11 is integrated by fastening together with the yoke 1b by a plurality of yoke fastening bands 6.

  On the other hand, the winding 2 is sandwiched between L-shaped winding fastening plates 12 as shown in FIG. That is, an L-shaped winding formed by welding a second metal plate 12b for fastening a winding to a first metal plate 12a disposed on both sides of the upper and lower yokes 1b so as to be orthogonal thereto. Fastening plates 12 are arranged on both sides of the upper and lower yokes 1 b, and these are connected by leg iron fastening fittings 3, and a spacer 8 is provided between the L-shaped winding fastening plate 12 and the winding 2. Are arranged, and the winding 2 is sandwiched between them.

  Note that the L-shaped winding clamping plate 12 is subject to rotational force due to the reaction force of the winding 2 and vertical vibration during transportation. The arranged L-shaped winding fastening plates 12 are connected to each other by a connecting plate 13.

(3-2) Actions / Effects In the static induction device of the present embodiment configured as described above, when the yoke 1b is tightened with the yoke tightening insulator 11 and tightened with the yoke tightening bracket. The mass is smaller than that, and the influence of leakage magnetic flux is also reduced. In addition, as in the first embodiment described above, when a coil-tightened square steel pipe is used for tightening the winding, the space for content wiring is reduced by an amount corresponding to the size of the square steel pipe. Since the L-shaped winding fastening plate 12 of the form has an open structure, a space for performing internal wiring is increased.

  As described above, according to the present embodiment, the clamping of the yoke is clamped by the yoke clamping insulator, and the winding is clamped by the L-shaped winding clamping plate. It is possible to provide a static induction device that reduces costs such as costs, improves electrical characteristics, and has good assembly and workability of the content wiring of the content structure.

(4) Fourth Embodiment (4-1) Configuration This embodiment is a modification of the first embodiment and the second embodiment, and as shown in FIG. 4, as a fastening member for the yoke 1b. The yoke tightening insulating plate 11 shown in the second embodiment is used, and the yoke tightening insulator 11 is integrated by tightening together with the yoke 1b by a plurality of yoke tightening bands 6. On the other hand, the winding 2 to be inserted into the leg iron 1a is formed by connecting the winding tightening square steel pipes 7 arranged above and below the winding 2 at the top and bottom of the leg iron fastening bracket 3 to tighten the winding. A spacer 8 is disposed between the square steel pipe 7 and the winding 2 and is clamped by adjusting it.

  In the present embodiment, the winding clamped square steel pipe 7a disposed on the upper part of the winding 2 is unevenly distributed on the side opposite to the winding (upward in the drawing) from the center of the upper yoke 1b. Is installed.

(4-2) Actions / Effects In the static induction machine of the present embodiment configured as described above, the upper winding clamping square steel pipe 7a does not have a function of sandwiching the yoke 1b of the laminated core. Since it can be arranged so as to be unevenly distributed on the opposite side of the winding from the center of the yoke 1b, the amount of leakage magnetic flux entering the upper winding fastening square steel pipe 7a from the winding is reduced. As a result, since the influence of the leakage magnetic flux in the upper coil tightening square steel pipe 7a is reduced, the generated loss can be further suppressed, so that it is possible to provide a static induction appliance with further improved electrical characteristics. .

(5) Fifth Embodiment The present embodiment is a modification of the fourth embodiment, and as shown in FIG. It is installed so as to be unevenly distributed on the opposite side (downward in the figure) with respect to the winding from the center of the yoke. Other configurations are the same as those in the fourth embodiment.

  In the static induction appliance of the present embodiment configured as described above, the lower winding fastening square steel pipe 7b does not have a function of sandwiching the yoke of the laminated iron core, so that it is wound more than the center of the yoke. Therefore, the amount of leakage magnetic flux entering the lower winding fastening square steel pipe 7b from the winding is reduced. As a result, since the influence of the leakage magnetic flux in the lower winding clamping square steel pipe 7b is reduced, the generated loss can be further suppressed, so that it is possible to provide a static induction appliance with further improved electrical characteristics. .

(6) Sixth Embodiment (6-1) Configuration This embodiment is a modification of the fourth embodiment and the fifth embodiment, and is arranged above the winding 2 as shown in FIG. The upper winding clamping square steel pipe 7a is installed so as to be unevenly distributed on the side opposite to the winding (upward in the drawing) from the center of the upper yoke. Further, the lower winding tightening square steel pipe 7b disposed at the lower part of the winding 2 is installed so as to be unevenly distributed on the opposite side (downward in the drawing) with respect to the winding from the center of the lower yoke.

  Further, in the present embodiment, the suspension ear 14 for lifting the entire contents at the position where the leg steel fastening bracket 3 is fixed to the upper and lower winding fastening square steel pipes 7a, 7b is the upper winding fastening. It is provided on the side surface of the square steel pipe 7a on the yoke 1b side.

(6-2) Action / Effect In the static induction machine of the present embodiment configured as described above, the hanging ear 14 is attached to a position where the leg steel fastening bracket 3 is fixed to the upper winding fastening square steel pipe 7a. As a result, no bending stress is generated when the upper winding tightening square steel pipe 7a is lifted. Further, both the connection of the leg clamps 3 and the attachment of the suspension ears 14 to the upper winding clamped square steel pipe 7a are carried out on the side surface of the winding clamped square steel pipe on the yoke side, thereby lifting It is possible to suppress the bending stress that is sometimes generated in the short direction of the coil-clamped square steel pipe.

  As a result, it is possible to reduce the attachment of the reinforcing member to the winding-clamped square steel pipe for lifting the content structure and tightening the winding, thereby reducing the mass and the cost. A static induction machine can be provided.

(7) Seventh Embodiment (7-1) Configuration This embodiment is a modification of the second embodiment, and as shown in FIG. 7, the second embodiment is a fastening member for the yoke 1b. Using the yoke fastening insulation plate 11 shown, the yoke fastening insulator 11 is integrated by fastening together with the yoke 1b with a plurality of yoke fastening bands 6.

  In addition, as shown in FIG. 7A, in this embodiment, a cooling pipe 16 that guides a cooling fluid from the outside of the tank 15 of the static induction electric appliance and a lower coil tightening square steel pipe 7b are connected to each other. The winding tightening square steel pipe 7b is a flow path for the cooling medium. Also, holes are formed in the insulating spacer 8 and the lower winding clamping square steel pipe 7b inserted between the winding 2 and the lower winding clamping square steel pipe 7b, and a cooling medium from outside the tank is wound. It is configured so that it can be introduced into the line 2.

(7-2) Actions / Effects In the static induction machine of the present embodiment configured as described above, the lower coil tightening square steel pipe 7b is cooled for clamping the coil 2 and forcibly cooling the inside of the coil. It has a function as a medium flow path. Therefore, since the forced cooling piping part used in the conventional static induction appliance as shown in FIG. 9 can be omitted, a lightweight static induction appliance with reduced costs can be provided.

It is a figure which shows the structure of 1st Embodiment of the static induction appliance which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of 2nd Embodiment of the static induction appliance which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of 3rd Embodiment of the static induction appliance which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of 4th Embodiment of the static induction appliance which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of 5th Embodiment of the static induction appliance which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of 6th Embodiment of the static induction appliance which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of 7th Embodiment of the static induction appliance which concerns on this invention, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of the conventional static induction machine of the self-cooling system in a coil | winding, Comprising: (A) is a front view, (B) is a side view. It is a figure which shows the structure of the static induction appliance of the conventional forced cooling system in a coil | winding, Comprising: (A) is a front view, (B) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Laminated iron core 1a ... Leg iron 1b ... Relay 2 ... Winding 3 ... Leg iron fastening bracket 4 ... Leg iron fastening band 5 ... yoke fastening bracket 6 ... yoke fastening band 7 ... Winding fastening Square steel pipe 8 ... Spacer 9 ... Upper square steel pipe connecting member 10 ... Lower square steel pipe connecting member 11 ... Yellow fastening insulator 12 ... L-shaped winding fastening plate 13 ... Connecting plate 14 ... Hanging ear 15 ... Tank 16 ... Cooling pipe 17 ... Joint fastening bracket 18 ... Winding fastening plate 19 ... Cooling pipe support plate

Claims (9)

A leg iron and a yoke consisting of a laminated iron core in which a plurality of electric iron plates are laminated, and a winding is wound around the leg iron, and the leg iron is integrated by a leg iron fastening bracket and a plurality of leg iron fastening bands. In a static induction electric machine,
A yoke fastening member that integrates the yoke and a winding fastening member that fastens the winding are configured separately,
The yoke fastening member is composed of a metal material having a width approximately equal to the minimum width of the yoke, which is arranged in parallel with the lamination direction of the yoke,
The said induction | transfer yoke and the said yoke fastening member are integrated by the several yoke fastening band, The stationary induction | guidance machine characterized by the above-mentioned. A leg iron and yoke composed of a laminated iron core in which a plurality of electric iron plates are laminated, and a winding is wound around the leg iron, and the leg iron is integrated by a leg iron fastening bracket and a plurality of leg iron fastening bands. In a static induction electric machine,
A yoke fastening member that integrates the yoke and a winding fastening member that fastens the winding are configured separately,
The yoke fastening member is composed of an insulating material disposed in parallel with the lamination direction of the yoke, and having a width comparable to the minimum width of the yoke,
The said induction | transfer yoke and the said yoke fastening member are integrated by the several yoke fastening band, The stationary induction | guidance machine characterized by the above-mentioned.   The winding fastening member is composed of a square steel pipe, and the square steel pipe is disposed above and below the winding via a spacer, and the upper and lower square steel pipes are connected to the top and bottom of the leg iron fastening bracket. The stationary induction device according to claim 1, wherein the static induction device is configured to sandwich the winding.   The winding fastening member is constituted by an L-shaped winding fastening plate formed by connecting a second metal plate to a first metal plate disposed on both sides of the upper and lower yokes so as to be orthogonal thereto. The L-shaped winding fastening plates are arranged on both sides of the upper and lower yokes, and spacers are disposed between the L-shaped winding fastening plates and the windings. The stationary induction machine according to claim 2, wherein a winding fastening plate is configured to be connected to the top and bottom of the leg iron fastening bracket to sandwich the winding.   The square steel pipe is arranged to be unevenly distributed on the opposite side of the winding from the center of the upper yoke, and a spacer is inserted between the winding and the square steel pipe. The stationary induction device according to claim 3.   The square steel pipe is arranged to be unevenly distributed on the opposite side of the winding from the center of the lower yoke, and a spacer is inserted between the winding and the square steel pipe. The stationary induction device according to claim 3.   Upper winding fastening members installed on both side surfaces of the upper yoke are connected by upper connecting members, and lower winding fastening members installed on both side surfaces of the lower yoke are lower connecting members. The stationary induction device according to any one of claims 3 to 6, wherein the static induction device is connected by the above.   The suspension lug is provided on a side surface on the yoke side of the winding fastening member at a position where the leg fastening fastener is connected and fixed to the winding fastening member. Item 8. The static induction device according to any one of items 7 to 9.   The lower square steel pipe is connected to a pipe for guiding a cooling medium from the outside into the winding, and a hole serving as a flow path for the cooling medium is formed at a predetermined position of the spacer and the lower square steel pipe. The stationary induction machine according to claim 3, wherein the square steel pipe is used as a flow path for a cooling medium.

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