JPWO2014170978A1 - Transformer - Google Patents

Abstract

In transformers such as oil-filled transformers, when the transformer is installed in a ship or a floating wind power generation tower, if the transformer continues to be shaken or inclined due to the influence of waves, the transformer tank Deviation may occur in the inner coil and iron core. The present invention provides a transformer that can withstand the effects of such waves and the like. The present invention relates to a transformer comprising an iron core, a coil wound around the iron core, an upper iron core fastener and a lower iron core fastener for fixing the iron core from above and below, and a tank for storing them. An iron core coil assembly with an anti-rest fitting is installed in the upper iron core fastener, and the anti-rest fitting has a notch, and the tank has an inner notch of the anti-static fitting. It is characterized in that protrusions having fitting shapes are arranged.

Description

  The present invention relates to a transformer such as an oil-filled transformer, and more particularly to a structure in which an iron core coil assembly housed in a transformer can withstand shaking and inclination.

  In Patent Document 1 (Japanese Patent Laid-Open No. 2008-103578), in a conventional transformer in which an anti-vibration rubber is provided on the upper part of the transformer and the panel side and the transformer main body are fixed, the transformer main body is interposed via the anti-vibration rubber. However, there was a problem that the vibration of the machine was transmitted to the panel side, but the transformer body was equipped with an anti-rest fitting, an anti-rest seat was installed on the outer plate on the panel side, and a bolt was fixed to the anti-rest fitting. An invention that solves this problem is disclosed by providing a round hole in the seat and passing the bolt through the round hole, and in a normal state, the bolt and the round hole of the steady rest are not in contact with each other. ing.

JP2008-103578

Since transformers such as oil-filled transformers for power distribution are usually installed on land, they are considered for shaking and vibration during transportation, but transformers are installed in towers of ships and floating offshore wind power generation. It does not take into account the shaking and tilting of the waves.
When a transformer is used in a ship or a tower of a floating offshore wind power generator, there is a possibility that the iron core and coil in the tank of the transformer will be displaced by constantly adding shaking and inclination.

  The purpose of the present invention is to prevent the iron core or coil in the transformer tank from being shaken or tilted by external energy such as waves when the transformer is installed in a ship or a floating offshore wind power generation tower. It is to provide a transformer to obtain.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-mentioned problems. To give an example of the above, "an iron core, a coil wound around the iron core, an upper iron core fastener for fixing the iron core from above and below, and In a transformer comprising a lower iron core fastener and a tank for storing them, an anti-static metal fitting for an iron core coil assembly in which the iron core and the coil are incorporated in the upper iron core fastener is disposed, and the anti-static metal fitting is cut off. It has a notch, and the tank is characterized in that a protrusion having a shape that fits into the notch of the steady rest fitting is disposed on the inside.

  According to the present invention, when a transformer such as an oil-filled transformer is installed in a ship or a tower of floating offshore wind power generation, the entire core coil assembly for assembling the coil and the iron core in the tank of the transformer is used as the tank. By adopting a fixed configuration, it is possible to provide a transformer that can withstand shaking and tilting.

The external appearance perspective view of the iron core coil assembly of Example 1 of this invention is shown. 1B is a perspective view of parts obtained by disassembling the iron core coil assembly of FIG. 1A. FIG. The perspective view of the steady rest metal fitting of the iron core coil assembly of the present invention is shown. A cross-sectional view of the tank of the transformer is shown. The top view showing arrangement | positioning of the components inside a transformer, and the figure of the relationship between the steadying metal fitting of an iron core coil assembly, and the stay of a transformer are shown. The external appearance perspective view of the iron core coil assembly of Example 2 of this invention is shown. The external appearance perspective view of the iron core coil assembly of Example 3 of this invention is shown. The external appearance perspective view of the iron core coil assembly of Example 4 of this invention is shown. The external appearance perspective view of the iron core coil assembly of Example 5 of this invention is shown. It is a figure which shows the relationship between the steadying metal fitting of an iron core coil assembly, and the stay of a transformer. The external appearance perspective view of the iron core coil assembly of Example 6 of this invention is shown. The external appearance perspective view of an iron core coil assembly when the iron core of the iron core coil assembly of this invention is used as a wound iron core is shown. FIG. 7B is a perspective view of a part obtained by disassembling the iron core coil assembly of FIG. 7A. The external appearance perspective view of an oil-filled transformer is shown.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Example 1
1A shows a perspective view of a core coil assembly of a transformer according to a first embodiment of the present invention, and FIG. 1B shows a perspective view of parts obtained by disassembling the core coil assembly of FIG. 1A.
1A and 1B, reference numeral 200 denotes an iron core coil assembly, reference numerals 1 and 2 denote lower iron core fasteners, reference numerals 3 and 4 denote longitudinal end portions of the lower iron core fastener, and studs for fastening two lower iron core fasteners. 5, 6, 7 are coils, 8, 9 are upper iron core fasteners, 10, 11 are longitudinal ends of the upper iron core fasteners, studs for fastening two upper iron core fasteners, and 12 is a stacked iron core , 13 and 14 are the steady rests of the iron coil assembly.
Reference numerals 15 to 22 denote studs for fastening the upper iron core fasteners 8 and 9 and the lower iron core fasteners 1 and 2, and 23 to 28 denote insulating walls sandwiched between the coil and the core iron core 12.

In FIG. 1A, coils 5, 6, and 7 are inserted into the product core 12. The stacked iron core 12 includes a strip type, a frame type, and a V-notch type. Here, a strip type core is shown.
A strip-type iron core is formed by stacking silicon steel plates cut into strips to form a leg portion and a yoke portion of the iron core. And when inserting the coils 5, 6, and 7, one yoke part is removed, a coil is inserted, a yoke part is returned again, and the iron core of a three-phase tripod is assembled. After assembling the stacked iron core 12 and the coils 5, 6, 7, the two lower iron core fasteners 1, 2 and the upper iron core fasteners 8, 9 face each other and are arranged in parallel to sandwich the iron core 12, and studs Fasten with 3, 4, 10, and 11.
Then, the lower iron core fasteners 1 and 2 and the upper iron core fasteners 8 and 9 are fastened by the studs 15 to 22. Here, the structure of the lower iron core fastener and the upper iron core fastener is a structure in which an elongated metal plate having a U-shape is opposed to the bottom of the U-shape, and the stacked iron core 12 is sandwiched between the bottom portions. Then, the lower iron core fasteners 1 and 2 and the upper iron core fasteners 8 and 9 are fastened with the studs 3, 4, 10, and 11. The part to be fastened is a U-shaped bottom part and an end part other than the stacked iron core 12, and is on the center line in the longitudinal direction of the bottom part.

  Further, the lengths of the lower core fasteners 1 and 2 and the upper core fasteners 8 and 9 are longer than the length in the longitudinal direction formed by inserting the three coils 5, 6, and 7 into the stacked iron core 12. The length is extended by the length of the stud that fastens the fastener, and the size is reduced. Then, the studs 15 to 22 for fastening the lower core fasteners 1 and 2 and the upper core fasteners 8 and 9 are formed on the upper side of the U-shape in the case of the lower core fasteners 1 and 2. In the case of the fasteners 8 and 9, they are formed on the lower side of the U-shape, and the locations are two points that are divided into approximately three equal parts with the ends of the upper and lower iron core fasteners.

  Next, insulating walls 23 to 28 are provided between the coils 5, 6, 7 and the upper iron core fasteners 8, 9 and the lower iron core fasteners 1, 2 to insulate the coil from the stacked iron core. The insulating walls 23 to 28 also insulate the coil from the upper and lower iron core fasteners. For the insulating wall, craft paper or press board for epoxy-based electric insulation, which is generally excellent in moisture resistance, heat resistance and oil resistance, is adopted.

  The coil and the stacked iron core are assembled, and the steady rests 13 and 14 are arranged on the upper side of the upper core fasteners 8 and 9 of the core coil assembly 200 fastened by the upper and lower iron core fasteners. The steady rests 13 and 14 are installed in such a manner that the upper sides formed by facing the U-shaped bottom portions of the two upper core fasteners 8 and 9 face each other at a point that is approximately divided into three equal parts. . Further, as shown in FIG. 1C, the steady rests 13 and 14 are formed of rectangular and long metal plates, and the length in the longitudinal direction is inside the transformer tank so as to be accommodated in the transformer tank. The length is slightly shorter than the length of the short side. In addition, recess-shaped notches 131 and 132 are formed at the center of both ends of the short side of the steady rest 13. The steady rests 13 and 14 are installed and fixed to the upper sides of the upper iron core fasteners 8 and 9 by screwing or welding.

Next, the transformer tank 29 will be described with reference to FIG. 1D.
FIG. 1D shows a cross-sectional view of the tank 29 of the transformer. The tank 29 is long in the direction in which the coils are arranged, and the cross section of the tank is a horizontally long rectangle.
Convex-shaped (projection) stays 291 to 294 are arranged at two locations that divide the length in the longitudinal direction inside the tank into approximately three equal parts and at two locations inside the tank that face the two locations.

Next, FIG. 1E shows a top view of the inside of the tank when the core coil assembly shown in FIG. 1A is housed in the tank of the transformer.
FIG. 1E is a top view in which the iron coil assembly is housed in the tank of the transformer. The stacked iron core 12 is sandwiched between two upper iron core fasteners 8 and 9, and the length of the upper iron core fastener in the longitudinal direction is as follows. The studs 10 and 11 for fastening the upper iron core fasteners 8 and 9 to each other are slightly shorter than the length in the longitudinal direction of the tank, and are fastened at both ends of the iron core fasteners at locations away from the core.
Further, the steady-state metal fittings 13 and 14 of the iron core coil assembly are arranged substantially vertically at the upper part of the upper iron core fasteners 8 and 9 and are roughly perpendicular to the transformer tank. It is comprised so that it may become.
And the recess-shaped notches 131, 132, 141, 142 of the steady-state metal fittings 13, 14 of the iron core coil assembly fit into the stays 291-294 arranged in the tank of the transformer. FIG. 1E (b) is an enlarged view of this fitting state (A part of FIG. 1E), and FIG. 1E (c) shows a perspective view of the state.

  FIGS. 1E (b) and (c) show a state in which the stay in the transformer tank and the steady-state fitting of the iron core coil assembly are fitted, and the width t of the stay 294 in the tank 29 is A slight gap is provided and narrower than the width T of the recess-shaped notch of the steady rest 14.

In the height direction, as shown in FIG. 1E (c), the thickness (L) of the stay in the tank of the transformer is made thicker than the thickness (l) of the steady-state fitting 14 of the iron coil assembly. This is in order to prevent the transformer from being disengaged due to shaking or tilting.
With such a configuration, when the iron core coil assembly is suspended and stored in the transformer tank, tanking can be performed using the stay as a guide.

(Example 2)
Next, Embodiment 2 of the present invention will be described with reference to the drawings.
FIG. 2 is a perspective view of the iron coil assembly showing the configuration of the second embodiment. The difference from the first embodiment is the shape of the steady rest of the iron coil assembly.
Further, since the components other than the steady rest metal fitting are the same as those in the first embodiment, the explanation other than the steady rest fitting is omitted.
In FIG. 2, the steady rests 30, 31, 32, 33 are arranged on the upper side of the U-shaped upper core fasteners 8 and 9. The shape of the steady rests 30, 31, 32, and 33 is not a shape that bridges the two core fasteners 8 and 9 as in the first embodiment, but a rectangular shape that is arranged on the upper side of each of the iron core fasteners. The places to be arranged are two places where the lengths of the iron core fasteners 8 and 9 in the longitudinal direction are roughly divided into three equal parts. In each of the steady fittings 30, 31, 32, 33, recess-shaped notches 301, 311, 321, 331 are formed at the center of the outer side.
Although not shown in the drawings, convex-shaped stays that fit into 301, 311, 321, and 331 are formed inside the tank of the transformer.

  In FIG. 2, the steady rests 30 and 31 and the steady rests 32 and 33 are arranged at positions facing each other, but the positions of the steady rests can be made different from each other. It is also possible to increase.

(Example 3)
Next, Embodiment 3 of the present invention will be described with reference to the drawings.
FIG. 3 is a perspective view of the core coil assembly showing the configuration of the third embodiment, and the configuration different from the configuration of the first embodiment is the configuration of the steady rest fitting of the core coil assembly.
Since the rest of the rest is the same as that of the first embodiment, description thereof is omitted.
In FIG. 3, the third embodiment has a configuration in which the steadying fittings of the iron coil assembly installed on the upper iron core fasteners 8, 9 are integrated with the iron core fasteners 8, 9.
The steady rests 34 to 37 are formed by forming a rectangular protrusion on the upper side of the upper iron core fasteners 8 and 9 and bending or pressing.
Further, recess-shaped notches 341, 351, 361, and 371 are formed in the central portion of the tip of the steady fitting that is integrated with the upper iron core fastener.
In the transformer tank, a stay that fits the steady rest fitting is arranged.
According to the configuration of the third embodiment as described above, it is not necessary to fix the iron core fastener by screws or welding as in the first and second embodiments, and since it is integrated, the steady rest can be formed with high accuracy.

Example 4
Next, a fourth embodiment of the present invention will be described with reference to the drawings.
FIG. 4 shows a perspective view of the iron coil assembly having the configuration of the fourth embodiment. The difference from the first embodiment is that the steady rest metal fittings are arranged at two ends of the upper iron core fastener in addition to the arrangement of the first embodiment. A rectangular metal plate is formed so as to bridge the iron core fasteners 8 and 9.
The steady rests 40, 41 disposed at both ends of the iron core fasteners 8, 9 are formed with recess-shaped notches 401, 411 at the outer center of both.
In addition, stays that fit into the steady rests 13 and 14 and the steady rests 40 and 41 are disposed in the tank of the transformer.
In such a configuration of the fourth embodiment, the longitudinal shaking of the iron core coil assembly 200 can be prevented by the steady rests 13 and 14, and the short direction shaking can be prevented by the steady rests 40 and 41. Therefore, it is possible to prevent a core coil assembly that swings in two dimensions.

(Example 5)
Next, Embodiment 5 of the present invention will be described with reference to the drawings.
FIG. 5A is a perspective view of the core coil assembly showing the configuration of the fifth embodiment. The difference from the configuration of the first embodiment is that the steady rest is placed below the lower core fastener in addition to the arrangement of the first embodiment. It is the point arrange | positioned similarly to an upper iron core fastener.
That is, in FIG. 5A, the same as in the first embodiment, the steady metal fittings 13 and 14 of the elongated rectangular iron coil assembly are bridged and arranged on the upper sides of the upper iron core fasteners 8 and 9. In the fifth embodiment, the lower iron core fasteners 1 and 2 are provided with two lower iron core fasteners 1 and 50 having the same dimensions as the upper anti-metal fittings on the lower side of the lower iron core fasteners 1 and 2. The difference is that it is placed and fixed by bridging to 2.

5A, concave cutouts 501 and 511 are formed at the center of both ends of the short sides of the lower steady rests 50 and 51. The steady rests 13 disposed on the upper core fasteners 8 and 9 and the steady rests 50 installed on the lower core fasteners 1 and 2 are arranged so as to coincide with each other in the vertical direction. 14 and the lower steady rest 51 are arranged so as to coincide with each other in the vertical direction, and as a result, the recesses formed in the steady rest are configured so as to coincide with each other in the vertical direction. With such a configuration, as shown in FIG. 5B, the iron coil assembly 200 can be housed using the stay 52 formed in the tank 29 of the transformer as a guide. 5B shows a rectangular parallelepiped stay (protrusion) 52 arranged vertically in the tank 29 of the transformer, and recess-shaped notches 132 and 501 of the upper and lower steady-stop fittings 13 and 50 of the core coil assembly 200. FIG. It is a figure which shows the state which is suitable.
Such an anti-sway structure in the upper and lower parts in the tank of the transformer can prevent the iron coil assembly from shaking and tilting against shaking and tilting outside the transformer.

(Example 6)
Next, Example 6 of the present invention will be described with reference to the drawings.
In the configuration of the fifth embodiment, the steadying fittings 13 and 14 of the upper iron core fastener 8 and the steadying metal fittings 50 and 51 of the lower iron core fastener 9 are each formed of an elongated rectangular metal plate, but FIG. The perspective view of the iron-core coil assembly of the structure which integrated the up-and-down steady metal fitting with the up-and-down iron core fastener, respectively is shown. The structure in which the steady rest metal fittings are integrated is as described in the third embodiment. In the sixth embodiment, the bottom metal fittings 64 and 65 are also formed integrally with the lower iron core fasteners 1 and 2.
As described above, according to the configuration of the sixth embodiment, since the steady rest metal fitting is formed integrally with the iron core fastener, the position of the steady rest metal fitting is manufactured with high accuracy, and it is particularly easy to perform vertical positioning. And tanking work can be done smoothly.

(Example 7)
Next, Embodiment 7 of the present invention will be described with reference to the drawings.
FIG. 7A shows a perspective view of the core coil assembly of the transformer of the seventh embodiment, and FIG. 7B shows a perspective view of parts by disassembling the core assembly 200 of FIG. 7A. 7A and 7B, 70 is a wound iron core, 71, 72, 73 are coils, 74 is an upper iron core fastener, 75 is a lower iron core fastener, 76, 77 are steady-state metal fittings for the iron core coil assembly, 78-85. Is a stud for fastening the upper iron core fastener 74 and the lower iron core fastener 75, and 86 to 91 are insulating walls.
In FIG. 7A, coils 71, 72, and 73 are inserted into the wound core 70.
The winding core 70 has a configuration as shown in FIG. 7B. When inserting the winding core 70, the upper wrap portion of the winding core is opened, a coil is inserted, and a lapping operation is performed to assemble the winding core and the coil. At this time, insulating walls 86 to 91 are sandwiched between the wound iron core 70 and the coils 71, 72, 73 to insulate the wound iron core from the coil. The insulating wall also insulates the upper core fastener 74 and the lower core fastener 75 from each other. After assembling the three-phase tripod iron core and assembling the wound iron core 70 and the coils 71, 72, 73, the upper iron core fastener 74 and the lower iron core fastener 75 sandwich the wound iron core 70 in the vertical direction, Fasten at 85.
Further, the upper iron core fastener 74 and the lower iron core fastener 75 are different in structure from those of the first embodiment, and the structure is formed by bending the front end of an elongated U-shaped side to form a flange portion 99, and the U-shaped clamp. The recessed portion is formed into an inverted U-shape and a U-shape, and the wound iron core 70 is sandwiched from above and below, and the flange portion 99 is fastened by the studs 78 to 85.
With this configuration, the steady rests 76 and 77 of the core coil assembly 200 are arranged on the U-shaped flat U-shaped flat part of the upper core fastener 74.
The steady rests 76 and 77 are elongated rectangular metal plates, and are arranged on a flat portion of the upper surface of the upper core fastener 74 perpendicular to the longitudinal direction and fixed by screwing or welding.
Further, recess-shaped notches 761, 762, 771, and 772 are formed at the center of both ends of the short sides of the steady rests 76 and 77, respectively. Then, as in the first embodiment, the stay corresponding to the recess-shaped cutouts of the steady rests 76 and 77 is arranged in the transformer tank, so that the configuration of the seventh embodiment is accommodated in the transformer tank. Transformers manufactured by tanking and lubricating are constructed to withstand shaking.

Next, an oil-filled transformer that houses an iron core coil assembly incorporating the iron core and coil of the present invention will be described. FIG. 8 is a perspective view showing the external appearance of an oil-filled iron core transformer equipped with a silicon steel plate or an amorphous ribbon steel core. In FIG. 8, an oil-filled iron core transformer 100 is generated from a coil, an iron core, or the like by providing wave ribs 95 on the periphery of a tank 29 containing insulating oil for insulating and cooling a coil mounted on a stacked iron core or a wound iron core. It has a structure that cools the heat.
In FIG. 8, reference numeral 96 denotes a welding line welded and fixed to the top and bottom of the wave rib 95 to give the wave rib 95 strength and prevent deformation. Reference numeral 97 denotes a primary side terminal installed at the upper part of the tank 29, which is a terminal for connecting a high voltage power source transmitted from the power plant. Reference numeral 98 denotes a secondary side terminal installed at the upper part of the tank 29, which is connected to send a voltage stepped up or down by a transformer to the load side.

  Further, since the core coil assembly shown in FIG. 1A, that is, an assembly having a configuration in which the coils are arranged in the horizontal direction is housed in the tank 29, the entire transformer has a horizontally long shape.

1, 2, ... Lower iron core clamp,
3, 4 ... Stud,
5, 6, 7 ... coil,
8, 9 ... Upper core clamp,
10, 11 ... Stud,
12 ... Seki iron core,
13, 14 ... Stabilizer for iron coil assembly,
131, 132, 141, 142... Recessed notch 15 to 22... Stud.
23-28 insulating wall,
29 ... tank,
291 292 293 294 stays (protrusions)
30, 31, 32, 33.
301, 311, 321, 331... Notch in recess shape,
34, 35, 36, 37 ... Stabilizers integrated with the upper core clamp,
341, 351, 361, 371 ... a recess-shaped notch,
40, 41 ... steady rest bracket,
401, 411... Notch having a concave shape,
50, 51 ... Stabilizers installed on the lower core clamp
501, 502... Notch having a concave shape,
52. Stay,
60, 61: Stabilizing bracket integrated with the upper core clamp,
62, 63 ... Stabilizer fitting integrated with the lower core clamp
601, 611, 641, 651... Notch having a concave shape,
70: Rolled iron core,
71, 72, 73 ... coils,
74 .. Upper iron core fastener,
75 ... Lower iron core clamp,
76, 77 ... Stabilizer for iron coil assembly,
761, 762, 771, 772 ... a recess-shaped notch,
78 to 85, studs for fastening the upper core fastener 74 and the lower core fastener 75, 86 to 91, insulating walls,
95 ... wave ribs,
96. Welding wire,
97 .. Primary side terminal,
98. Secondary side terminal,
99 ... flange part,
100: Oil-filled iron core transformer,
200: Iron core coil assembly.

Claims (9)

In a transformer comprising an iron core, a coil wound around the iron core, an upper iron core fastener and a lower iron core fastener for fixing the iron core from above and below, and a tank for storing these,
Arranging a steady rest fitting of the iron core coil assembly in which the iron core and the coil are incorporated in the upper iron core fastener,
The steady rest has a notch,
The said tank has arrange | positioned the protrusion of the shape fitted in the notch of the said steadying metal fitting inside, The transformer characterized by the above-mentioned. The transformer according to claim 1, wherein
The steady-state metal fitting of the iron coil assembly is formed of a rectangular metal plate, the length in the longitudinal direction is slightly smaller than the length of the short side in the tank of the transformer,
In addition, a transformer is characterized in that a recess-shaped notch is formed in the central portion of the short side end of the steady rest metal fitting. The transformer according to claim 1, wherein
The upper iron core fastener and the lower iron core fastener of the iron core coil assembly are formed by fastening an elongated U-shaped bottom face to each other with a stud, and one of the steady rest metal fittings above the upper iron core fastener. Or more, it is bridge | crossed perpendicularly | vertically with respect to the longitudinal direction of this upper core fastener, and the transformer characterized by the above-mentioned. The transformer according to claim 1, wherein
A transformer characterized in that the shape of the upper iron core fastener is an elongated U-shape, and an anti-rest fitting is integrally formed on one side of the U-shape. The transformer according to claim 1, wherein
A transformer characterized in that the steady-state fittings of the iron core coil assembly arranged in the upper iron core fastener are arranged in the long direction and the short direction of the upper iron core fastener, respectively. The transformer according to claim 1, wherein
The notch of the steady rest metal fitting of the iron core coil assembly has a concave shape,
The projection of the tank of the transformer that fits into the concave shape is a rectangular parallelepiped shape,
A transformer characterized in that the length of the protrusion of the tank is larger than the thickness of the steady rest metal fitting. In a transformer comprising an iron core, a coil wound around the iron core, an upper iron core fastener for fixing the iron core from above and below, a lower iron core fastener, and a tank for storing these,
The upper core clamp and the lower core clamp are provided with a steady-state clamp for the core coil assembly,
A recess-shaped notch is formed in the steady rest metal fitting,
A transformer having a shape that fits into the notch of the steady rest fitting is disposed on the tank of the transformer. The transformer according to claim 7,
The transformer characterized in that the steady rest fittings arranged on the upper iron core fastener and the steady rest metal fittings arranged on the lower iron core fastener are arranged so that the notches of the recess shape coincide with each other in the vertical direction. The transformer according to claim 7,
The protrusion arranged in the tank that fits into the recess-shaped notch of the steady rest metal fitting,
A transformer that is a rectangular parallelepiped and has a length that is longer than the distance between the upper steady rest and the bottom steady rest.

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