JP2019054204A - Stationary induction apparatus - Google Patents

Abstract

To achieve high reliability between a connection part between an internal terminal and a lead wire, and a container while suppressing enlargement of the container.SOLUTION: The stationary induction apparatus includes: a container with a connection terminal part to be connected with the outside; an induction apparatus body stored in the container; a lead wire which is led out from the induction apparatus body and whose front end is electrically connected with an internal terminal of the connection terminal part; and an insulation enclosing part comprised of a molded part of thermosetting resin formed to cover a charge exposure part of a connection part between the internal terminal and the lead wire.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a stationary guidance device.

  In a static induction device, for example, a transformer for high-voltage power distribution equipment, a resin-molded transformer body is accommodated in a conductive tank, and an insulating cooling medium such as air or insulating gas is contained therein. What is enclosed and configured is known. At this time, a connection terminal portion called a bushing is provided so as to penetrate the outer wall of the tank, and an inner terminal of the connection terminal portion and a lead wire led out from the transformer body are connected in the tank. The For example, Patent Document 1 discloses that an insulating cable having a configuration in which an electrical insulating layer is formed on the outer periphery of a hollow conductor is used as the lead wire.

Japanese Utility Model Publication No.59-131121

  In the transformer as described above, since the connection portion between the inner terminal of the connection terminal portion and the lead wire is a charge exposure portion to which a high voltage is applied, the charge exposure portion and the ground potential are set. It is necessary to secure the necessary creepage insulation distance with the container. As a result, the size of the container tends to increase, making it difficult to reduce the size of the device.

  Therefore, a stationary induction device that can increase the insulation reliability between the connection portion between the inner terminal and the lead wire and the container while suppressing an increase in the size of the container is provided.

  The first stationary induction device according to the embodiment includes a container having a connection terminal portion for connection to the outside, a guidance device main body housed in the container, and a leading end led out from the guidance device main body. Insulation enclosure part which consists of the lead wire electrically connected with the inner side terminal of a terminal part, and the thermosetting resin molding provided so that the charge exposure part of the connection part of the inner side terminal and the lead wire may be plugged up It is equipped with.

  The second stationary induction device according to the embodiment includes a container having a connection terminal portion for connection to the outside, a guidance device main body housed in the container, and a leading end led out from the guidance device main body. A lead wire electrically connected to the inner terminal of the terminal portion; and a shrinkable insulating tube disposed so as to close a charge exposed portion of a connection portion between the inner terminal and the lead wire.

The front view which shows 1st Embodiment and shows the whole structure of a transformer roughly The figure which expands and shows the connection part of FIG. The figure which shows 2nd Embodiment and shows a connection part roughly The figure which shows 3rd Embodiment and shows a connection part roughly The figure which shows 4th Embodiment and shows a connection part roughly Sectional drawing which expands and shows the connection part of FIG. The figure which shows 5th Embodiment and shows the mode at the time of resin impregnation Sectional drawing which shows 6th Embodiment and expands and shows a connection part The figure which shows 7th Embodiment and shows a connection cable part roughly The figure which shows 8th Embodiment and shows a connection cable part roughly The 9th Embodiment is a figure showing a connection cable part roughly

  Hereinafter, some embodiments applied to a transformer for high-voltage power distribution facilities will be described with reference to the drawings. In addition, suppose that the same code | symbol is attached | subjected to a common part between several embodiment, and repeated description is abbreviate | omitted.

(1) First Embodiment A first embodiment will be described with reference to FIG. 1 and FIG. FIG. 1 schematically shows a configuration of a transformer 1 as a stationary induction device according to the present embodiment. The transformer 1 is configured by accommodating a transformer body 3 as an induction device body in a metal tank 2 as a container. The transformer main body 3 is made of, for example, a mold type transformer, and a plurality of lead wires 4 (only one is shown) is led out from the upper part thereof. The lead wire 4 has a connection terminal 5 at the end of a cable having an insulating coating 4a. The transformer body 3 is installed in the tank 2 in a form of being placed on an insulating support 6.

  A plurality of bushings 7 (only one is shown) are provided on the upper wall portion of the tank 2 as connection terminal portions to be connected to the outside. As is well known, the bushing 7 is provided so that the central conductor 9 penetrates the central portion of the vertical tube 8 extending vertically through the upper wall portion, and the upper end of the central conductor 9 is an outer terminal 9a. A lower end portion of the center conductor 9 is an inner terminal 9 b that protrudes downward from the vertical tube 8. The connection terminal 5 of the lead wire 4 is electrically connected to the inner terminal 9b. The tank 2 is set to ground potential. Further, the inside of the tank 2 is sealed, and an insulating cooling medium such as air or insulating gas is enclosed.

  Now, the structure of the connection portion between the connection terminal 5 of the lead wire 4 and the inner terminal 9b will be described with reference to FIG. As described above, after the transformer body 3 is accommodated in the tank 2, the connection terminal 5 of the lead wire 4 is electrically connected to the inner terminal 9b. As a connection method at this time, various means such as screwing, caulking, welding, and brazing can be employed. And the insulation surrounding part 10 is provided so that the charge exposure part of the connection part of these inner side terminals 9b and the connection terminals 5 may be plugged up.

  In the present embodiment, the insulating surrounding portion 10 includes an outer shell body 11 that functions as a mold frame for resin molding, and a resin layer 12 made of a thermosetting resin that is cast and cured inside the outer shell body 11. Composed. The outer shell 11 is in the form of a thin cylindrical container that is bent from an insulating material such as hard plastic into a square shape in the middle in the vertical direction. The upper end surface of the outer shell body 11 is arranged in a form having an opening 11a serving as a resin injection port while the lower end portion of the soot tube 8 of the bushing 7 is inserted. Moreover, the bottom part of the outer shell 11 is arranged so that the tip part of the lead wire 4 penetrates densely, that is, the resin does not leak between the insulating coating 4a.

  At this time, as the resin layer 12, for example, a room temperature curable thermosetting resin is employed, and specifically, a two-component curable epoxy that cures at room temperature by mixing a main agent and a curing agent. A resin material is used. This resin material is cast into the outer shell 11 in a mixed state of two liquids, and becomes a hard resin layer 12 by being cured in the outer shell 11. The resin layer 12 covers the connection portion between the inner terminal 9b and the connection terminal 5, that is, the entire charging exposed portion. At the same time, the resin layer 12 insulates a part of the lower end portion of the soot tube 8 as an insulator disposed in the vicinity of the connection portion and the lead wire 4 as an insulator disposed in the vicinity of the connection portion. It shape | molds in the form which also covers the front-end | tip part of the coating | cover 4a.

  In the transformer 1 having the above-described configuration, a charging exposure portion is generated by connecting the inner terminal 9b of the bushing 7 and the connection terminal 5 of the lead wire 4 in the tank 2, but the charging exposure is performed. The portion is closed by the insulating surrounding portion 10 having the resin layer 12 made of a thermosetting resin molding. Therefore, the insulation performance of the connection portion between the inner terminal 9b and the lead wire 4 can be enhanced. Therefore, according to the present embodiment, unlike the conventional case in which it is necessary to ensure a relatively large creepage insulation distance for the charging exposed portion, the inner terminal 9b and the lead wire 4 The excellent effect that the insulation reliability between the connecting portion and the tank 2 can be enhanced can be obtained.

  In particular, in the present embodiment, since the room temperature curing type thermosetting resin is adopted for the resin layer 12, the insulation surrounding portion can be formed with simple facilities and work without the need for equipment such as heating at the assembly site of the transformer 1. 10 can be formed. In the present embodiment, the outer shell body 11 made of an insulating material is provided in the insulating surrounding portion 10, and the resin layer 12 is molded by casting into the outer shell body 11. Thereby, the insulation surrounding part 10 of a desired shape can be formed, the operation | work of removal of a shaping | molding die becomes unnecessary, and shaping | molding becomes easy. Furthermore, since the connection terminal 5 to be connected to the inner terminal 9a is provided at the tip of the cable of the lead wire 4, there is an advantage that the connection between the inner terminal 9a and the connection terminal 5 can be easily performed. .

  In the above embodiment, the outer shell body 11 that functions as a molding die is used as a part of the insulating enclosure 10 as it is, but the molding die so as to surround the connection portion between the inner terminal 9 b and the connection terminal 5. May be disposed, and a thermosetting resin may be cast inside and cured. In this case, by removing the mold after molding, an insulating enclosure made of a resin layer can be obtained. The removed mold can be used over and over again. At this time, the material of the mold may be metal or the like.

(2) Second and Third Embodiments FIG. 3 shows a second embodiment. The second embodiment is different from the first embodiment in the configuration of the connection portion between the inner terminal 9 b and the connection terminal 5 of the lead wire 4. That is, also in the second embodiment, the cylindrical container-like outer shell 15 and the casting inside the outer shell 15 are cast so as to close the charging exposed portion of the connecting portion between the inner terminal 9 b and the connecting terminal 5. An insulating surrounding portion 17 including the resin layer 16 made of the cured thermosetting resin is provided.

  The resin layer 16 of the insulating enclosure 17 includes a part of the lower end portion of the soot tube 8 as an insulator disposed in the vicinity of the connection portion and a lead wire as an insulator disposed in the vicinity of the connection portion. 4 is formed to cover the tip of the insulating coating 4a. At this time, the outer peripheral surface of the lower end portion of the soot tube 8 is a roughened portion 18 that has been roughened in advance, and the outer peripheral surface of the tip portion of the insulating coating 4a of the lead wire 4 is also roughened in advance. The surfaceizing unit 19 is used. In FIG. 3, for the sake of convenience, the roughened portions 18 and 19 are indicated by hatching.

  According to the second embodiment as described above, as with the first embodiment, by providing the insulating surrounding portion 17, the inner terminal 9b and the lead wire 4 It is possible to obtain an excellent effect such as that the insulation reliability between the connecting portion and the tank 2 can be increased. In addition to this, the surface of the lower end portion of the soot tube 8 and the tip end portion of the insulating coating 4a of the lead wire 4 as an insulator disposed in the vicinity of the connection portion is roughened, so-called anchors are provided. Due to the effect, the adhesion strength of the joint surface between the insulator and the resin layer 16 of the insulating enclosure 17 can be increased.

  FIG. 4 shows a third embodiment. In the third embodiment, the inner terminal 9 b of the bushing 7 and the connection terminal 5 of the lead wire 4 are electrically connected by the connecting bar 21. The connecting bar 21 is provided with an insulating coating 21a on the outer periphery of a rod-shaped conductor (metal), and is provided with a first connection terminal 22 at one end (upper side in the figure) of the conductor and at the other end (lower side in the figure). A second connection terminal 23 is provided. The first connection terminal 22 is connected to the inner terminal 9 b, and the second connection terminal 23 is connected to the connection terminal 5.

  At this time, a cylindrical container-like outer shell 15 and a resin layer 16 made of a thermosetting resin cast and cured inside the outer shell 15 are formed at a connection portion between the inner terminal 9 b and the first connection terminal 22. A first insulating surrounding portion 24 is provided. In addition, a cylindrical container-like outer shell 15 is formed at a connection portion between the second connection terminal 23 and the connection terminal 5, and a resin layer 16 made of a thermosetting resin that is cast and cured inside the outer shell 15. A second insulating enclosure 25 is provided. According to the third embodiment as described above, it is possible to obtain an excellent effect such that the insulation reliability of the connection portion can be improved while suppressing the enlargement of the tank 2. Instead of the connecting bar 21, a flexible connection cable may be used.

(3) Fourth Embodiment Next, a fourth embodiment will be described with reference to FIGS. 5 and 6. Although not shown, also in the fourth embodiment, similarly to the first embodiment, the transformer as the stationary induction device is configured by accommodating the transformer main body 3 in the tank 2 as the container. The And as shown in FIG. 5, the inner side terminal 9b of the bushing 7 provided in the tank 2 and the lead wire 4 of the transformer main body 3 are electrically connected. At this time, as in the third embodiment, electrical connection is made between the inner terminal 9b and the connection terminal 5 of the lead wire 4 via the connecting bar 21 having the first connection terminal 22 and the second connection terminal 23. Connected.

  In the present embodiment, a first contracted insulating tube 31 is provided at a connection portion between the inner terminal 9b and the first connection terminal 22 so as to block the charge exposed portion. At the same time, a second contracted insulating tube 32 is provided at a connection portion between the second connection terminal 23 and the connection terminal 5 so as to close the charging exposed portion. At this time, as the shrink insulating tubes 31, 32, for example, a room temperature shrink type of a rubber material such as silicone rubber is adopted. Specifically, for example, a cold shrink tube such as “Cold Shrink Tube (registered trademark)” “Quick Splice” or “QT-III Series” manufactured by Sumitomo 3M Limited may be employed. These contracted insulating tubes 31 and 32 are provided in a state in which a large-diameter tube state is maintained by the spiral core, and after being fitted to the outer periphery of the attachment portion, the contraction is performed by pulling out the spiral core, and the connection portion Strongly adheres to the outer peripheral surface. In this case, the shrinkable insulation tubes 31 and 32 are strongly adhered to the outer peripheral surface of the connection portion by the shrinkage force of rubber, and high insulation is obtained.

  FIG. 6 shows an enlarged configuration of a connection portion between the second connection terminal 23 of the connecting bar 21 and the connection terminal 5 of the lead wire 4. Here, the second connection terminal 23 and the connection terminal 5 are connected by a connection sleeve 33, and a conductive tape 34 is wound around the outer periphery thereof, and a high dielectric tape 35 is wound around the outer periphery thereof. Has been. And the 2nd shrink insulation tube 32 is the outer periphery of the edge part by the side of the 2nd connecting terminal 23 among the insulation coating 21a of the connection bar 21, the outer periphery of the high dielectric tape 35, and the front end side of the insulation coating 4a of the lead wire 4. The outer periphery is provided so as to cover the entire surface.

  In this case, although not shown in detail, the surface of the insulator arranged in the vicinity of the periphery of the connecting portion, that is, the outer peripheral surface of the end portion of the insulating coating 21a of the connecting bar 21, and the lead wire 4 as the insulator The outer peripheral surface of the tip end portion of the insulating coating 4a is made a smooth surface in advance, and is covered with the second shrinkable insulating tube 32 in this state.

  Further, as shown in FIG. 5, the conductive tape 34 and the high dielectric tape 35 are wound around the outer peripheral portion of the connection portion between the inner terminal 9 b of the bushing 7 and the first connection terminal 22 of the connecting bar 21. The first shrinkable insulating tube 31 covers the outer periphery of the high dielectric tape 35, and a part of the lower end portion of the soot tube 8 as an insulator disposed in the vicinity of the periphery of the connection portion, and the connection as the insulator. The bar 21 is provided so as to cover the outer peripheral surface of the upper end portion of the insulating coating 21a. Also in this case, the outer peripheral surface of the lower end portion of the soot tube 8 and the outer peripheral surface of the upper end portion of the insulating coating 21a are previously smoothed and covered with the first shrinkable insulating tube 31.

  According to such 4th Embodiment, although the charging exposure part arises in the connection part of the inner side terminal 9b and the connection bar 21, and the connection part of the connection bar 21 and the lead wire 4, respectively, those charge The exposed portion is blocked by the shrink insulating tubes 31 and 32. Therefore, the insulation performance of the connection portion between the inner terminal 9a and the lead wire 4 can be enhanced. As a result, as in the first embodiment, the insulation reliability between the tank 2 and the connection portion between the inner terminal 9a and the lead wire 4 and the tank 2 can be improved while suppressing an increase in the size of the tank 2. Etc. can be obtained.

  In the present embodiment, the first and second shrinkable insulation tubes 31 and 32 are of the normal temperature shrinkage type, so that the equipment and work can be simplified compared to the conventional heat shrinkage type insulation tubes. However, the shrink insulation tubes 31 and 32 can be attached. In particular, in the present embodiment, the insulators arranged in the vicinity of the periphery of the connecting portion, that is, the lower end portion of the soot tube 8, both end portions of the insulating coating 21a of the connecting bar 21, and the distal end portion of the insulating coating 4a of the lead wire 4 are It was set as the structure covered with the shrinkable insulation tubes 31 and 32 in the state where the surface is smooth. As a result, the inner surfaces of the contracted insulating tubes 31 and 32 are joined to the smooth surface of the insulator, suppressing the formation of a gap between them, and obtaining good adhesion and high insulation. be able to.

(4) Fifth and Sixth Embodiments FIG. 7 shows a fifth embodiment. In the fifth embodiment, the configuration of the insulating coating 39 of the insulator, for example, the lead wire 38, disposed in the vicinity of the periphery of the connecting portion is different from that of the fourth embodiment. In other words, the outer periphery of the conductor 40 is covered with the insulating coating 39 at the leading end of the lead wire 38. The insulating coating 39 impregnates a base material 41 such as a nonwoven fabric with an impregnating resin 42 such as an epoxy resin. It is comprised by making it harden.

  At this time, a smooth plastic film 43 is disposed on a portion of the base material 41 where the outer peripheral surface is desired to be a smooth surface, and in this state, the impregnation resin 42 in the impregnation container 44 is impregnated. Thus, the insulating coating 39 is made of a material obtained by impregnating and curing the impregnating resin 42 on the base material 41 having the smooth film 43 on the surface. According to this, the film 43 comes to be arrange | positioned on the outer periphery of the insulation coating 39 as an insulator, and the smoothness of the surface can be obtained easily. Further, a resin (for example, a fluororesin) that is non-adhesive to the thermosetting resin may be used as the material of the film 43, and the film 43 may be removed after the impregnating resin 42 is cured. In this case, since the surface of the insulating coating 39 is cured in a state smoothed by the film 43, a smooth surface can be easily obtained with the same material configuration as the surrounding insulator.

  FIG. 8 shows a sixth embodiment. The sixth embodiment is different from the fourth embodiment in the configuration of the shrinkable insulating tube 46. That is, the shrinkable insulation tube 46 is provided so as to cover the outer peripheral portion of the connection portion between the second connection terminal 23 of the connecting bar 21 and the connection terminal 5 of the lead wire 4. A plurality of pleats 47 are integrally provided on the outer surface portion of the. According to this configuration, the creepage distance in the shrinkable insulating tube 46 can be increased to further improve the insulation.

(5) Seventh to Ninth Embodiments and Other Embodiments FIG. 9 shows a seventh embodiment. The seventh embodiment differs from the fourth embodiment in that the space between the inner terminal 9b of the bushing 7 and the connection terminal 5 of the lead wire 4 is not the connecting bar 21, but is flexible. They are electrically connected via the connection cable 50. The connection cable 50 is configured, for example, by providing an insulation coating 50a on the outer periphery of a stranded wire, providing a first connection terminal 51 at one end (upper side in the figure), and providing a second connection terminal 52 at the other end. Has been.

  The first connection terminal 51 of the connection cable 50 is connected to the inner terminal 9b of the bushing 7 in advance. At this time, the conductive tape 34 and the high dielectric tape 35 are wound around the outer peripheral portion of the connection portion between the inner terminal 9b and the first connection terminal 51, and the first contraction insulating tube 31 is closed so as to close the charging exposed portion. Covered by. The first shrinkable insulating tube 31 covers the outer periphery of the high dielectric tape 35, and part of the lower end portion of the soot tube 8 as an insulator disposed in the vicinity of the periphery of the connection portion, and the connection cable 50 as an insulator. It is provided in a form that also covers the outer peripheral surface of the upper end portion of the insulating coating 50a.

  Although not shown, after the transformer main body 3 is accommodated in the tank 2, the second connection terminal 52 and the lead wire 4 are connected. In this case, it is a matter of course that a contracted insulating tube or an insulating surrounding portion is also provided at the connecting portion between the second connection terminal 52 and the lead wire 4. Here, the lead wire 4 of the transformer body 3 is generally hard and inflexible, and when it is electrically connected to the inner terminal 9b, its connection workability, and further, an insulating shrinkable tube or an insulating enclosure. There is a circumstance that the forming workability of the part becomes worse. However, as in this embodiment, workability such as connection work can be improved by interposing the flexible connection cable 50.

  FIG. 10 shows an eighth embodiment. In the eighth embodiment, unlike the seventh embodiment, the inner terminal 9b (center conductor 9) of the bushing 7 and the flexible connection cable 55 are joined and integrated in advance. ing. The outer periphery of the connection cable 55 is covered with an insulating coating 55a, and has a connection terminal 56 at the other end (lower end in the figure). In this case, the connection portion between the center conductor 9 and one end of the connection cable 55 is housed in the soot tube 8, and is not exposed. In the configuration of the eighth embodiment, the connection workability between the connection terminal 56 of the connection cable 55 and the lead wire 4 (not shown) after accommodating the transformer body 3 can be further enhanced. Of course, a contraction insulating tube or an insulation surrounding portion is also provided at the connection portion between the connection terminal 56 and the lead wire 4.

  FIG. 11 shows a ninth embodiment. The ninth embodiment is different from the seventh embodiment in that the flexible connection cable 50 is connected to the lead wire 4 side in advance. In this case, with the second connection terminal 52 of the connection cable 50 being electrically connected to the lead wire 4, the conductive tape 34 and the high dielectric tape 35 are wound around the outer peripheral portion of the connection portion to expose the charge. It is covered with a second shrinkable insulating tube 32 so as to close the part. Although not shown, after the transformer main body 3 is accommodated in the tank 2, the inner terminal 9b of the bushing 7 and the first connection terminal 51 of the connection cable 50 are connected, and the connection portion is also contracted and insulated. A tube or insulating enclosure is provided. Also according to the ninth embodiment, workability such as connection work can be improved by interposing the flexible connection cable 50.

  In each of the embodiments described above, an epoxy resin is used as the thermosetting resin constituting the insulating enclosure, and a silicone rubber material is used as the shrinkable insulating tube. Various materials can be used as the material of the part and the shrinkable insulating tube. It may be configured to be cured by heating or to shrink. A pleat may be provided on the outer surface of the insulating enclosure. Various changes can be made to the specific configuration of the entire transformer.

  In addition, as a static induction | guidance | derivation apparatus, it can also apply not only to a transformer but to a reactor, for example. The several embodiments described above have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a transformer (stationary induction device), 2 is a tank (container), 3 is a transformer body (induction device body), 4 and 38 are lead wires, 4a and 39 are insulation coatings (insulators), 5 Is a connection terminal, 7 is a bushing (connection terminal part), 8 is a soot tube (insulator), 9b is an inner terminal, 10, 17, 24 and 25 are insulating enclosure parts, 11 and 15 are outer shells, and 12 and 16 are Resin layer, 18 and 19 are roughened portions, 21 is a connecting bar, 21a is an insulating coating (insulator), 31, 32 and 46 are shrink insulating tubes, 41 is a base material, 42 is an impregnating resin, 43 is a film, 47 is a pleat, 50 and 55 are connection cables, and 50a and 55a are insulation coatings (insulators).

Claims (12)

A container having a connection terminal portion for connection to the outside;
A guiding device body housed in the container;
A lead wire that is led out from the induction device body and the tip is electrically connected to the inner terminal of the connection terminal portion;
A stationary induction device comprising an insulating surrounding portion made of a thermosetting resin molded product provided so as to close a charging exposed portion of a connecting portion between the inner terminal and the lead wire.   The stationary induction device according to claim 1, wherein the thermosetting resin constituting the insulating surrounding portion is a room temperature curing type.   The stationary induction device according to claim 1 or 2, wherein the insulating surrounding portion includes an outer shell body made of an insulating material, and thermosetting resin is molded by casting into the outer shell body.   The insulator disposed in the vicinity of the periphery of the connection portion of the inner terminal and the lead wire is covered with the insulating surrounding portion in a state where the surface is roughened. Static induction equipment given in one paragraph. A container having a connection terminal portion for connection to the outside;
A guiding device body housed in the container;
A lead wire that is led out from the induction device body and the tip is electrically connected to the inner terminal of the connection terminal portion;
A stationary induction device comprising a contracted insulating tube disposed so as to close a charge exposed portion of a connection portion between the inner terminal and the lead wire.   The stationary induction device according to claim 5, wherein the shrinkable insulating tube is made of a material having a normal temperature shrinkage.   The stationary induction device according to claim 5 or 6, wherein the insulator disposed in the vicinity of the periphery of the connection portion of the inner terminal and the lead wire is covered with the contracted insulating tube with a smooth surface.   The stationary material according to claim 7, wherein the insulator is made of a material obtained by impregnating and curing a resin on a substrate having a smooth film on the surface, or a material obtained by removing the film after impregnating and curing the resin. Induction equipment.   The stationary lead according to any one of claims 5 to 8, wherein the lead wire has a connection terminal connected to the inner terminal at a distal end of a cable having an insulating coating having a smooth surface. machine.   The stationary induction device according to any one of claims 1 to 9, wherein a pleat is integrally provided on an outer surface portion of the insulating surrounding portion or the shrinkable insulating tube.   The stationary induction device according to any one of claims 1 to 10, wherein the inner terminal and the lead wire are connected by a flexible connection cable having an insulating coating.   The stationary induction device according to claim 11, wherein the inner terminal and the connection cable are joined and integrated in advance.

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