JP2009147196A - Earthquake-proof type molded transformer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an earthquake-proof type molded transformer for an earthquake-proof As class by using simple and low-cost base members. <P>SOLUTION: The earthquake-proof type molded transformer has such a constitution as to constitute each base member by providing a hollow material with cross-section in U-shape or square form wherein a hollow portion is formed, and as to provide a plurality of holes for passing its fastening screws for fastening it to a foundation base of an installation place in the positions of both sides of its lower metal fitting in a plane vertical to the coil axis of its molded coils and in the positions separated from its lower metal fitting, and further, as to provide one or more holes of the plurality of holes in the positions which are present in a plane vertical to the arranging direction of a plurality of its molded coils and which are present in positive and negative directions within a range of 15-25 degrees relative to the vertical line passing through the center of gravity of a constitutional body comprising the molded coil, core, upper metal fitting, and lower metal fitting. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an earthquake-resistant mold transformer, and more particularly to a configuration that increases rigidity in an installed state.

  For example, a transformer installed in a nuclear power plant is required to have an earthquake resistance class As. The performance required as the earthquake resistance class As is as follows: (1) The transformer in the installed state has a rigid structure with a natural frequency of 20 Hz or more, and (2) The structure of each part of the transformer is a structure that can withstand earthquake shaking. . For transformers installed in places other than nuclear power plants, a structure that satisfies this seismic class As is being studied from the viewpoint of ensuring high safety.

  If the transformer has a rigid structure with a natural frequency of 20 Hz or more in the installed state, resonance with the seismic wave is avoided, the swing of the transformer is reduced, and the risk of damage to the transformer components is low. For this reason, the countermeasure to said (1) is considered prioritized over the countermeasure to said (2) conventionally.

  For example, Japanese Patent Application Laid-Open No. 56-23722 (Patent Document 1) and Japanese Patent Application Laid-Open No. 58-164205 (Patent Document 2) are conventional techniques related to the present invention and described in Patent Documents. And those described in JP-A-2005-32814 (Patent Document 3). Japanese Patent Application Laid-Open No. Sho 56-23722 describes a structure in which both ends of an upper fastener 3 for fastening an upper portion of an iron core are supported by a triangular stay and the stay is fixed on a base base as an earthquake resistant transformer. As a result, the natural frequency of the transformer can be increased to 20 Hz or higher. Japanese Patent Application Laid-Open No. 58-164205 also discloses an upper end for tightening the core joint above the coil as an earthquake-resistant dry transformer. There is described a configuration in which a frame and a lower end frame for fastening an iron core joint below the coil are integrally connected and fixed to the foundation. Japanese Patent Application Laid-Open No. 2005-32814 discloses that the core 1 of the transformer body is placed on the iron core base 12 including the thick plate-like main body 12A and the flat plate 12B, and the lower end of the inverted V-shaped seismic member 10 is placed. Is mounted on the flat plate portion 12B, and the rigidity is increased by fixing the lower end of the earthquake-resistant member 10 to the foundation directly by the foundation bolt 13 without a structure between the transformer installation foundation surface and the structure. Further, the stay member 15 is provided at the lower end of the earthquake-resistant member 10 to increase the rigidity. A flat plate connecting member is placed on the upper core fastening member 30 so that the space between the upper core fastening members 30 is placed. A configuration is described in which the rigidity is increased by coupling, whereby the natural frequency of the transformer can be increased to 20 Hz or higher.

JP-A-56-23722 JP 58-164205 A JP 2005-32814 A

  Among the above prior arts, in the seismic transformer disclosed in Japanese Patent Application Laid-Open No. 56-23722, a base 5 is provided at the lower part of the lower fastener 4, and a base base 21 is arranged at the lower part of the base 5. The end stay 22 is fixed on the base base 21. For this reason, it is considered that the coupling strength between the lower clamp 4 and the base base 21 and the coupling strength between the upper clamp 3 and the base base 21 are lower than when the base 5 is not provided. In order to make up for this, it is considered that the end stay 22 and the base base 21 need to be thick and wide, and it is expected that the weight of the entire transformer will increase. Increasing the transformer weight reduces the natural frequency of the transformer and degrades the seismic performance. Moreover, in the earthquake-resistant dry type transformer described in Japanese Patent Application Laid-Open No. 58-164205, the transformer is a foundation by fixing the connecting fittings 12 arranged on both sides of the transformer to the foundation 10 with a total of four fixing bolts. It is considered that the fixing strength of the entire transformer with respect to the foundation 10 is relatively low due to the configuration fixed to 10, and particularly in the central part of the transformer where no fixing bolt is arranged, the amplitude due to shaking is large during an earthquake. Therefore, it is expected that there is a high risk that the connecting portion between the connection fitting 12 and the foundation 10 will be broken. In JP-A-2005-32814, since the iron core 12 has a single plate-like configuration including the thick plate-like main body 12A, the weight of the iron core 12 is increased, and material costs, transportation costs, and the like are increased. It is expected that the number will increase, and it may be subject to restrictions in terms of the installation location and the method of carrying into the installation location.

  The problem of the present invention is that, in view of the situation of the prior art, in the earthquake-resistant mold transformer, as the base member fixed to the base of the installation place, a lightweight, simple and low-cost configuration is used. In addition, the natural frequency of the transformer in the installed state is set to 20 Hz or more, and the earthquake resistance of the parts is improved.

  An object of the present invention is to provide an earthquake-resistant mold transformer that solves the above problems and satisfies the earthquake-resistant As class.

  In order to solve the above-mentioned problems, in the present invention, a base member fixed to the lower part of the lower metal fitting that supports the iron core as a seismic mold transformer satisfying the seismic As class has a cross-sectional or U-shaped cross section. And a plurality of holes through which fixing screws for fixing the transformer to the base of the installation site are perpendicular to the coil axis of the molded coil. In a plane spaced apart from the lower metal fitting on both sides of the lower metal fitting, and at least some of the plurality of holes are in a plane perpendicular to the arrangement direction of the plurality of mold coils, It is configured to be provided at a position in the range of 15 degrees to 25 degrees in both positive and negative directions with respect to a straight line in the vertical direction passing through the center of gravity of the transformer structure including the mold coil, iron core, upper metal fitting, and lower metal fitting. The base member is provided with a reinforcing member for reinforcing the strength against the vertical load of the base member at a position in the orthographic projection region of the coil in a plane perpendicular to the coil axis of the molded coil in the hollow portion. The configuration is as follows. The molded coil has a recess formed in the end surface in the coil axial direction, and a coil pressing member fixed to the upper metal fitting is fitted in the recess to increase the rigidity in the coil axial direction. The molded coil has a split structure in which the lead wire at the winding start end and the lead wire at the winding end of the secondary winding connected to the secondary winding connection terminal fixed to the upper metal fitting side are divided. In addition, a resin is filled around each divided lead line. Further, the plurality of connection bars that connect the primary windings of the plurality of molded coils are made of annealed copper wire, and each connection bar is held in a separated state.

  According to the present invention, it is possible to provide an earthquake-resistant mold transformer that satisfies the earthquake-resistant As class.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1-6 is explanatory drawing of the earthquake-resistant type transformer as a 1st Example of this invention. FIG. 1 is a configuration diagram of a seismic mold transformer according to a first embodiment of the present invention, and FIG. 2 is a plan view showing a fixing position of a base member to a base in the seismic mold transformer of FIG. 3 is an explanatory view of a reinforcing member for a base member of the earthquake-resistant mold transformer of FIG. 1, FIG. 4 is an explanatory view of a holding structure of a mold coil in the earthquake-resistant mold transformer of FIG. 1, and FIG. FIG. 6 is an explanatory diagram of a connection bar in the earthquake resistant mold transformer of FIG. 1, and FIG. 6 is an explanatory diagram of the lead wire at the winding start end and the winding end end of the secondary side winding in the earthquake resistant mold transformer.

In FIG. 1, 1 is a seismic mold transformer as a first embodiment of the present invention, 100 is a base for installation where the seismic mold transformer 1 is fixed, and 13a, 13b and 13c are molds. The coil, 14 is an iron core, 11 is an upper metal fitting fixed to the upper part of the iron core 14, and 12 is provided along the arrangement direction of a plurality (three) of the molded coils 13a, 13b, 13c at the lower part of the iron core 14, A lower metal fitting fixed to the iron core 14 and supporting the iron core 14, 15 is a base member fixed to the lower part of the lower metal fitting 12, 15a ₁ and 15a ₂ are plane portions in the base member 15, and 15b is a cross-section with a cross section. the hollow member portion of the shaped or be a hollow square shape in the base member 15 in which the hollow portion is configured with a hollow member formed _{therein, 151a 11, 151a 12, 151b} 11, 151b 12, 51c _11, 151c ₁₂ is provided in the hollow portion of the hollow member portion 15b, a vertical direction (Z axis direction) the base member reinforcing member to increase strength against loads of the hollow member portion 15b to reinforce the hollow member portion 15b , 16a, 16b are inverted V-shaped reinforcing members that connect the upper metal fitting 11 and the base member 15, and 161a ₁ is provided in contact with the hypotenuse surface of the inverted V-shaped reinforcing member 16a. The inverted V-shaped reinforcing member supporting members 161b ₁ and 161b ₂ that support the member 16a so as not to fall in the ± Y-axis direction are provided in contact with the oblique side surface of the inverted V-shaped reinforcing member 16b. Support members 171a ₂₂ and 171b ₂₂ for supporting the V-shaped reinforcing member 16b so as not to fall in the ± Y-axis direction are fixing screws for fixing the transformer 1 to the base 100 at the installation site. To pass The hole and COG are the center of gravity of the transformer structure composed of the molded coils 13a, 13b and 13c, the iron core 14, the upper metal fitting 11 and the lower metal fitting 12, and 18 is the lead-out end of the secondary winding of the molded coil. The secondary winding connection terminal to which the lead wire and the lead wire at the end of winding are connected, 21 is a secondary winding connection portion including the secondary winding connection terminal 18, and 25 is three molded coils 13a. , 13b, 13c is a connection bar for connecting the primary side windings. It is assumed that the three molded coils 13a, 13b, and 13c form a three-phase coil.

The base member 15 has a plurality of holes (including holes 171a ₂₂ and 171a ₂₃ ) for passing bolts (not shown) which are fixing screws for fixing the transformer to the base of the installation site, and the molded coil 13a. 13b, 13c, the lower metal fittings 12 on both sides (± X axis direction) of the lower metal fitting 12 in a plane (XY plane) perpendicular to the coil axes c _a -c _a , c _b -c _b , c _c -c _c. It is provided in the position away from. At least some of the plurality of holes (including holes 171a ₂₂ and 171b ₂₂ ) are within a plane (XZ plane) perpendicular to the direction (Y-axis direction) in which the mold coils 13a, 13b, and 13c are arranged. the molded coil 13a at, 13b, 13c, core 14, the positive and negative with respect to the straight line _c p -c _p vertical passing through the center of gravity COG of the transformer assembly consists of upper bracket 11 and lower bracket 12 (± Z-axis directions) They are provided at positions S ₁ and S ₂ that form an angle θ in both directions. The angle θ is an angle in the range of 15 to 25 degrees.

  A secondary winding connection terminal 18 to which a lead wire of the secondary winding of each of the molded coils 13a, 13b, 13c is connected is attached to the upper metal fitting 11.

  In the following, each component in FIG. 1 used in the description is given the same reference numeral as in FIG.

  2 is an XY plan view showing a fixing position of the base member 15 to the base 100 in the earthquake-resistant mold transformer 1 of FIG.

In FIG. 2, 171 a _{11 to} 171 a ₂₂ and 171 b _{11 to} 171 b ₂₂ are holes for passing bolts (not shown) as fixing screws for fixing the earthquake-resistant mold transformer 1 to the base 100 at the installation site. It is. Among these, the twelve holes 171a _{11 to} 171a ₂₂ are provided at positions spaced in the + X-axis direction from the lower metal fitting 12, and the twelve holes 171b _{11 to} 171b ₂₂ are arranged from the lower metal fitting 12 to the −X-axis direction. It is provided in the position spaced apart. The holes 171a _{11 to} 171a ₂₂ and the holes 171b _{11 to} 171b ₂₂ are provided at positions where the holes 171a ₁₁ and 171b ₁₁ are substantially symmetrical with respect to the lower metal fitting 12, and the holes 171a ₁₂ and 171b ₁₂ are formed in the lower metal fitting 12. The holes 171a ₂₂ and the holes 171b ₂₂ are provided at positions that are substantially symmetrical with respect to the lower metal fitting 12, and are respectively located at positions that are substantially symmetrical with respect to the lower metal fitting 12. Is provided. Further, of the holes 171 a _{11 to} 171 a ₂₂ , the holes 171 a _{11 to} 171 a ₁₄ are arranged in the flat surface portion 15 a ₁ in the base member 15, and the holes 171 a _{15 to} 171 a ₁₈ are provided in the hollow material portion 15 b in the base member 15. The holes 171a _{19 to} 171a ₂₂ are arranged in the flat portion 15a ₂ . Similarly, of the holes 171 b _{11 to} 171 b ₂₂ , the holes 171 b _{11 to} 171 b ₁₄ are provided in the flat surface portion 15 a ₁ in the base member 15, and the holes 171 b _{15 to} 171 b ₁₈ are the hollow material portions 15 b in the base member 15. The holes 171 b _{19 to} 171 b ₂₂ are provided in the flat surface portion 15 a ₂ in the base member 15. Among these, the holes 171a _{15 to} 171a ₁₈ , 171a ₁₁ , 171a ₂₂ , 171b _{15 to} 171b ₁₈ , 171b ₁₁ , and 171b ₂₂ are planes (XZ) perpendicular to the arrangement direction (Y-axis direction) of the mold coils 13a, 13b, and 13c. in the plane), the transformer to straight _c p -c _p in the vertical direction (± Z-axis direction) passing through the center of gravity COG of the structure, the position _S 1 angled in the range of each 15 degrees of 25 degrees to both positive and negative directions, It is provided in the S _2. Further, the hole _171a 16 _{~171a 17} and the hole _171b 16 _{~171b 17} is provided orthogonal projection area of the coil 13b in a plane perpendicular (XY plane) to the coil axis _{c b} a molded coil 13b.

Further, in FIG. _{2, 151a 11, 151a 12,} 151b 11, 151b 12, 151c 11, 151c 12, 151d 11, 151d 12 and _{151a 21, 151a 22, 151b 21} , 151b 22, 151c 21, 151c 22, 151d 21 , 151d ₂₂ are base member reinforcing members that are provided in the hollow portion of the hollow member portion 15b of the base member 15 and reinforce the strength against the vertical load (Z-axis direction) of the hollow member portion 15b of the base member 15. is there. Base member reinforcing member _{151a 11, 151a 12, 151a 21} , 151a 22 , yes at the position of the orthogonal projection area of the coil 13a in the coil axis _c a -c _a to a plane perpendicular to the mold coil 13a (XY plane) The base member reinforcing members 151b ₁₁ , 151b ₁₂ , 151b ₂₁ , 151b ₂₂ are positions in the orthographic projection region of the coil 13b in a plane (XY plane) perpendicular to the coil axis c _b -c _b of the molded coil 13b. The base member reinforcing members 151c ₁₁ , 151c ₁₂ , 151c ₂₁ , 151c ₂₂ are within the orthographic projection region of the coil 13c in a plane (XY plane) perpendicular to the coil axis c _c -c _c of the molded coil 13c. It is arranged at the position.
Hereinafter, the same reference numerals as those in FIG. 2 are given to the components in FIG. 2 used in the description.

FIG. 3 is an explanatory view of a reinforcing member for a base member of the earthquake-resistant mold transformer 1 of FIG. (A) is a YZ plane view showing a base member for reinforcing member 151a ₁₁ provided in the hollow portion of the hollow member portion 15b of the base member 15, (b) is a XY plane view of the c-c cross section. The base member reinforcing member 151a ₁₁ is a quadrangular plate-like member, which is in contact with the inner side of the hollow material portion 15b at the end surfaces of the three sides and is fixed to the inner side by welding or the like. The same applies to the other reinforcing members for the base member. By providing these base member reinforcing members, the rigidity of the hollow material portion 15b of the base member 15 is increased, and the strength against the vertical (Z-axis direction) load is increased.

  FIG. 4 is an explanatory diagram of a mold coil holding structure in the earthquake-resistant mold transformer 1 of FIG. FIG. 4 shows the case of the molded coil 13a.

In FIG. 4, 13a ₁ is the primary winding of the molded coil 13a, 13a ₂ is the secondary winding, 132a, 132b, 132c, the end face of the coil axis _c a -c _a direction of molded coil 13a respectively provided with recesses, 133a, 133b, 133c to be fixed to the upper bracket 11, a coil holding member pressing the end face of the coil axis _c a -c _a direction of the mold coil 13a. The coil pressing members 133a, 133b, and 133c press the mold coil 13a in a state where the respective ends in the −Z-axis direction are fitted in the recesses 132a, 132b, and 132c, and increase the rigidity of the mold coil 13a. Similarly, with respect to the other molded coils 13b and 13c, the rigidity of the coil is increased by fitting and holding the coil pressing member in the recess provided in the coil end face. The other mold coils 13b and 13c are the same as in the case of the mold coil 13a.

  FIG. 5 is an explanatory diagram of the lead wire at the winding start end and the winding end end of the secondary winding connected to the secondary winding connection terminal 18 in the earthquake resistant mold transformer 1 of FIG. (A) is a block diagram of the secondary side winding connection part 21, a leader line, and its peripheral part, (b) is an enlarged view of the structure of the A section in (a). In the earthquake-resistant mold transformer 1, the lead wire at the winding start end and the lead wire at the winding end of each of the secondary side windings of the mold coils 13 a, 13 b, and 13 c are each divided into a plurality of pieces. Resin is filled around each lead line. FIG. 5 shows the case of the molded coil 13c.

In FIG. 5, 13c ₂ is the secondary winding of the molded coil _{13c, 131b 1, 131b 11,} 131b 12 is the secondary winding 13c ₂ of the winding start end of the lead _line, 131b _2, 131b 21, 131b _22, secondary winding 13c ₂ of the winding finish end of the lead line, 1511 volts, 1512 nut, 30 is a resin filled. Each of the lead lines 131b ₁ and 131b ₂ is a lead line divided into two, the lead line 131b ₁ is composed of the lead lines 131b ₁₁ and 131b ₁₂ , and the lead line 131b ₂ is the lead lines 131b ₂₁ and 131b. ₂₂ is a configuration. The resin 30 is also filled between the root portion of the lead wire 131b _{11 and} the root portion of the lead wire 131b ₁₂ , and between the root portion of the lead wire 131b _{21 and} the root portion of the lead wire 131b ₂₂ , so that the individual lead wires The root portion is independently fixed by the resin 30. Since each of the lead lines 131b ₁ and 131b ₂ has a divided form, the weight (mass) of each lead line is reduced and the individual lead lines 131b ₁ and 131b ₂ respond individually to external forces. In addition, the phase difference is generated in the vibration of the individual lead lines, and the vibration of the individual lead lines is canceled and reduced by the phase difference, and the stress concentrated on the root portion of the lead line is also reduced. Since the stress is reduced, disconnection of the leader line is avoided. In addition, each of the lead lines 131b ₁ and 131b ₂ is divided, so that one of the lead lines 131b ₁₁ and 131b ₁₂ is disconnected, or one of the lead lines 131b ₂₁ and 131b ₂₂ is disconnected. electrical conductivity even when is ensured, connectivity to the secondary winding connecting terminal 18 of the secondary winding 13c ₂ of the molded coil 13c is kept. As a result, the reliability of the transformer is improved. Further, the lead lines 131b ₁ and 131b ₂ are fixed by the resin 30 at the root part of the lead line 131b ₁₁ , the root part of the lead line 131b ₁₂ , the root part of the lead line 131b ₂₁ , and the root part of the lead line 131b ₂₂ , respectively. Therefore, each root portion is fixed in a state where the effective length of the vibrating portion is shortened, and the vibration becomes difficult. Also from this point, vibration due to the shaking of the earthquake is reduced, and disconnection or the like is avoided. The mold coils 13a and 13b are the same as in the case of the mold coil 13c.

  FIG. 6 is an explanatory diagram of a connection bar 25 for primary winding connection in the earthquake-resistant mold transformer 1 of FIG.

  In FIG. 6, 25a is a connection bar that connects between the winding end of the primary side winding of the molded coil 13a and the winding start end of the primary side winding of the molded coil 13b, and 25b is the molding coil 13b. A connection bar 25c is connected between the winding end of the primary winding of the primary coil and the winding start of the primary winding of the molded coil 13c, and 25c is the winding end of the primary winding of the molded coil 13c. , And 40a, 40b, 40c, and 40d are spacers, and 41a, 41b, 41c, and 41d are tapes, respectively, connecting the winding start ends of the primary side windings of the molded coil 13a. The spacers 40a and 40b are provided between the connection bars 25a and 25c so that the connection bars 25a and 25c are held apart from each other, and the spacers 40c and 40d are provided between the connection bars 25b and 25c. The connection bars 25b and 25c are held apart from each other. The tape 41a is wound on the spacer 40a and the spacer 40a is fixed between the connection bars 25a and 25c. The tape 41b is wound on the spacer 40b and the spacer 40b is fixed between the connection bars 25a and 25c. The tape 41c is wound on the spacer 40c and the spacer 40c is fixed between the connection bars 25b and 25c. The tape 41d is wound on the spacer 40d and the spacer 40d is connected between the connection bars 25b and 25c. Secure to. The connection bars 25a, 25b, and 25c are each made of an annealed copper wire. These connection bars are restrained by spacers and tape in a state of being separated from each other, so that during the earthquake, the individual movement of each connection bar is regulated in a safe state that does not cause a short circuit. The magnitude of each vibration generated due to the shaking is also suppressed. Moreover, since the elongation rate with respect to external force becomes large because these connection bars are comprised with an annealed copper wire, a disconnection is suppressed and a vibration is absorbed. For this reason, the occurrence of a short circuit between the mold coils and the occurrence of cracks in the mold resin at the start and end of the primary winding of each mold coil during an earthquake can be suppressed. It can be maintained in a safe state.

As a result of conducting an earthquake resistance test on the above-mentioned earthquake resistant mold transformer 1, it was confirmed that it had the performance of the earthquake resistance class As. As the earthquake resistance test, the earthquake resistant mold transformer 1 of FIG. 1 is installed on the base 100 through bolts in the holes of the base member 15, and the base 100 is excited at an acceleration of 0.1 G. The vibration generated at the tip of the earthquake-resistant mold transformer in the Z-axis direction was measured. Seismic mold transformer 1 is fixed relative to the base stand 100, hole _171a 11 on the base member 15 shown in FIG. _2, ~171a _22, 171b _11, by inserting the bolts (number of bolts 24) to ～171B ₂₂ did. As a result, the natural frequency in the ± Y-axis direction is 27.1 Hz, the vibration acceleration in the same direction is 0.79 G (response magnification = vibration acceleration / excitation acceleration = 0.79 G / 0.1 G = 7.9), ± X The natural frequency in the axial direction is 31.9 Hz, the vibration acceleration in the same direction is 0.27 G (response magnification = 2.7), and the natural frequency in any direction is larger than the reference value (20 Hz) of the earthquake resistance class As. The performance is well within the range of the seismic class As.

  Further, in the earthquake-resistant mold transformer 1 of FIG. 1, the holding structure of the mold coil shown in FIG. 4, the split structure of the lead wire at the winding start end and winding end of the secondary winding shown in FIG. The filling structure, the holding structure of the connection bar 25 shown in FIG. 6 and the annealed copper wire structure improve the earthquake resistance of these parts, and also in this respect, the earthquake resistance class As is satisfied.

According to the earthquake-resistant mold transformer 1 of the first embodiment of the present invention, the earthquake-resistant As class can be satisfied. In particular, the base member 15 is formed by holes 171a _{15 to} 171a ₁₈ , 171a ₁₁ , 171a ₂₂ , 171b _{15 to} 171b ₁₈ , 171b ₁₁ , 171b ₂₂ and bolts passing through them provided at positions S ₁ and S ₂ in FIG. Since it is being fixed to the base stand 100, the plane area of the base member 15 can be made small, and an earthquake-resistant As class can be satisfied in a state with a small installation plane area. Further, the base member 15 can be reduced in size and weight. Further, since the base member 15 has a configuration including a hollow material portion 15b having a U-shaped cross-section and a hollow portion formed therein, the weight of the base member 15 can be reduced also in this respect. Furthermore, the base member 15 can be configured simply and at low cost.

  FIG. 7: is a top view which shows the fixing position to the base stand of the base member in the earthquake-resistant mold transformer as the 2nd Example of this invention. The earthquake-resistant mold transformer of the second embodiment is the same as the earthquake-resistant mold transformer 1 of the first embodiment except that the positions and number of fixing holes in the base member are different. It shall have. The number of holes is twice that of the case of the earthquake-resistant mold transformer 1 of the first embodiment. The constituent elements of the seismic mold transformer of the second embodiment used in the following description are the same as those of the first embodiment except for the fixing holes in the base member. The same reference numerals as in the case of are used.

In FIG. 7, reference numerals 171a _{11 to} 171a ₃₄ and 171b _{11 to} 171b ₃₄ denote the base plate 100 (FIG. 1) where the earthquake-resistant mold transformer of the second embodiment (hereinafter denoted by reference numeral 2 for convenience) is installed. ) Holes (a total of 48 holes) through which bolts as fixing screws are fixed. Among these holes, one of the 22 holes 171a _{12 to} 171a ₃₄ (except 171a ₂₈ ) is provided at a position spaced from the lower metal fitting 12 in the + X-axis direction, and the other 22 holes 171b _{12 to} 171b ₃₄ (171b (Except ₂₈ ) is provided at a position spaced from the lower metal fitting 12 in the -X-axis direction. The holes 171a _{11 to} 171a ₃₄ and the holes 171b _{11 to} 171b ₃₄ are provided so that the holes 171a ₁₁ and 171b ₁₁ are substantially symmetrical with respect to the lower metal fitting 12, and the holes 171a ₁₂ and 171b ₁₂ are formed in the lower metal fitting 12. The hole 171a ₃₄ and the hole 171b ₃₄ are provided at positions that are substantially symmetrical with respect to the lower metal fitting 12, and are provided at positions that are substantially symmetrical with respect to the lower metal fitting 12, respectively. It has been. Further, among the holes 171 a _{11 to} 171 a ₃₄ , the holes 171 a _{11 to} 171 a ₁₅ are arranged on the flat surface portion 15 a ₁ in the base member 15, and the holes 171 a _{16 to} 171 a ₂₃ and 171 a _{29 to} 171 a ₃₄ are hollow in the base member 15. provided wood portion 15b, the hole _171a 24 _{~171a 28} are arranged in a plane portion 15a _2. Similarly, of the holes 171 b _{11 to} 171 b ₃₄ , the holes 171 b _{11 to} 171 b ₁₅ are provided in the plane part 15 a ₁ in the base member 15, and the holes 171 b _{16 to} 171 b ₂₃ , 171 b _{29 to} 171 b ₃₄ are provided in the base member 15. provided in the hollow member portion 15b, the hole _171b 24 _{~171b 28} is provided on the plane portion 15a _2. Of these holes, holes 171a _{29 to} 171a ₃₄ , 171a ₁₂ , 171a ₂₇ , 171b _{29 to} 171b ₃₄ , 171b ₁₂ , and 171b ₂₇ are holes 171a _{15 to} 171a ₁₈ in the case of the earthquake-resistant mold transformer 1 of the first embodiment. , 171a ₁₁ , 171a ₂₂ , 171b _{15 to} 171b ₁₈ , 171b ₁₁ , 171b ₂₂ , the transformer structure in a plane (XZ plane) perpendicular to the arrangement direction (Y-axis direction) of the mold coils 13 a, 13 b, 13 c A position S ₁ that forms an angle in the range of 15 to 25 degrees in both positive and negative directions with respect to a straight line c _p −c _p (FIG. 1) in the vertical direction (± Z axis direction) passing through the center of gravity COG (FIG. 1) of It is provided in S ₂ (FIG. 1). Further, the holes 171a _{31 to} 171a ₃₂ and the holes 171b _{31 to} 171b ₃₂ are provided in the orthographic projection region of the coil 13b on a plane (XY plane) perpendicular to the coil axis c _b (FIG. 1) of the molded coil 13b. Yes.

Further, in FIG. _{7, 151a 11, 151a 12,} 151b 11, 151b 12, 151c 11, 151c 12, 151d 11, 151d 12 and _{151a 21, 151a 22, 151b 21} , 151b 22, 151c 21, 151c 22, 151d 21 , 151d ₂₂ are base member reinforcing members, each of which is provided in the hollow portion of the hollow member portion 15b of the base member 15, and against the load in the vertical direction (Z-axis direction) of the hollow member portion 15b of the base member 15. Reinforce strength. Of these, the base member reinforcing members 151a ₁₁ , 151a ₁₂ , 151a ₂₁ , 151a ₂₂ are formed of the coil 13a on a plane (XY plane) perpendicular to the coil axis c _a -c _a (FIG. 1) of the molded coil 13a. The base member reinforcing members 151b ₁₁ , 151b ₁₂ , 151b ₂₁ , 151b ₂₂ are arranged at positions in the orthographic projection area, and are planes (XY plane) perpendicular to the coil axis c _b -c _b (FIG. 1) of the molded coil 13b. The base member reinforcing members 151c ₁₁ , 151c ₁₂ , 151c ₂₁ , 151c ₂₂ are arranged on the coil axis c _c -c _c (FIG. 1) of the molded coil 13c. The coil 13c is arranged at a position in the orthographic projection area on a perpendicular plane (XY plane).

  In the seismic mold transformer 2 of the second embodiment, the end face holding structure of each mold coil, the winding start end of the secondary winding connected to the secondary winding connection terminal, and the drawing of the winding end end The structure of the wire splitting structure and the structure for fixing each lead wire root portion with resin, and the structure of the connection bar for primary side winding connection are also the earthquake-resistant molds of the first embodiment described in FIGS. It is assumed that the configuration is the same as that of the transformer 1.

  As a result of the earthquake resistance test, it was confirmed that the earthquake resistant mold transformer 2 of the second embodiment also has the performance of the earthquake resistance class As. As the seismic test, the seismic mold transformer 2 is installed on the base 100 (FIG. 1) through bolts in each hole of the base member 15 as in the case of the seismic mold transformer 1 of the first embodiment. The foundation 100 was excited at an acceleration of 0.1 G, and the vibration generated at the tip end in the Z-axis direction of the earthquake-resistant mold transformer 2 at this time was measured. As a result, the natural frequency in the ± Y-axis direction is 28.1 Hz, the vibration acceleration in the same direction is 0.78 G (response magnification = vibration acceleration / excitation acceleration = 0.78 G / 0.1 G = 7.8), ± X The natural frequency in the axial direction is 31.8 Hz, the vibration acceleration in the same direction is 0.25 G (response magnification 2.5), and the natural frequency in any direction greatly exceeds the reference value (20 Hz) of the earthquake resistance class As. The performance is well within the range of the earthquake resistance class As.

  Further, also in the seismic mold transformer 2 of the second embodiment, the holding structure of the end surface of the mold coil, the split structure of the lead wire at the winding start end and the winding end of the secondary side winding, and the filling structure with resin, And the seismic resistance of each part is improved by the holding structure of the connection bar 25 and the annealed copper wire structure, and also in this respect, the seismic class As is satisfied.

According to the earthquake-resistant mold transformer 2 of the second embodiment of the present invention, the earthquake-resistant As class can be satisfied. In particular, the base member 15 is formed by holes 171a _{29 to} 171a ₃₄ , 171a ₁₂ , 171a ₂₇ , 171b _{29 to} 171b ₃₄ , 171b ₁₂ , 171b ₂₇ and bolts passing through them provided at positions S ₁ and S ₂ in FIG. Since it is being fixed to the base stand 100, the plane area of the base member 15 can be made small, and an earthquake-resistant As class can be satisfied in a state with a small installation plane area. Further, the base member 15 can be reduced in size and weight. Further, since the base member 15 has a configuration including a hollow material portion 15b having a U-shaped cross-section and a hollow portion formed therein, the weight of the base member 15 can be reduced also in this respect. Furthermore, the base member 15 can be configured simply and at low cost.

  FIG. 8: is a top view which shows the fixed position to the base of the base member in the earthquake-resistant mold transformer as a 3rd Example of this invention. The earthquake-resistant mold transformer of the third embodiment is also the same as the earthquake-resistant mold transformer 1 of the first embodiment except that the positions and number of fixing holes in the base member are different. It shall have. The number of the holes is larger than that in the case of the earthquake-resistant mold transformer 1 of the first embodiment, and the positions of the holes are also increased on the outer peripheral side of the base member. The constituent elements of the seismic mold transformer of the third embodiment used in the description below are the same as those of the first embodiment except for the reference numerals of the fixing holes in the base member. The same reference numerals as in the case of are used.

In FIG. 8, reference numerals 171a _{11 to} 171a ₂₆ and 171b _{11 to} 171b ₂₆ denote base plates 100 (FIG. 1) for installing the earthquake-resistant mold transformer of the third embodiment (hereinafter denoted by reference numeral 3 for convenience). It is a hole for passing a bolt as a fixing screw to be fixed to. Among them, one of the fourteen holes 171a _{12 to} 171a ₂₅ is provided at a position spaced in the + X-axis direction from the lower fitting 12, and the other fourteen holes 171b _{12 to} 171b ₂₅ are -X from the lower fitting 12. It is provided at a position spaced apart in the axial direction. The holes 171a _{11 to} 171a ₂₆ and the holes 171b _{11 to} 171b ₂₆ are provided so that the hole 171a ₁₁ and the hole 171b ₁₁ are substantially symmetrical with respect to the lower metal part 12, and the hole 171a ₁₂ and the hole 171b ₁₂ are provided to the lower metal part 12. The holes 171a ₂₆ and the holes 171b ₂₆ are provided at positions that are substantially symmetrical with respect to the lower metal fitting 12, and are respectively at positions that are substantially symmetrical with respect to the lower metal fitting 12. Is provided. Further, of the holes 171 a _{11 to} 171 a ₂₆ , the holes 171 a _{11 to} 171 a ₁₄ are arranged in the flat surface portion 15 a ₁ in the base member 15, and the holes 171 a _{15 to} 171 a ₂₂ are provided in the hollow material portion 15 b in the base member 15. The holes 171a _{23 to} 171a ₂₆ are arranged in the flat portion 15a ₂ . Similarly, of the holes 171 b _{11 to} 171 b ₂₆ , the holes 171 b _{11 to} 171 b ₁₄ are provided in the flat surface portion 15 a ₁ in the base member 15, and the holes 171 b _{15 to} 171 b ₂₂ are provided in the hollow material portion 15 b in the base member 15. is, the hole _171b 23 _{~171b 26} is provided on the plane portion 15a _2. Among them, the hole _{171a 11, 171a 26, 171b 11} , 171b 26 has a hole _171a 15 _~171a 18 in the case of seismic mold transformer 1 of the first _{embodiment, 171a 11, 171a 22, 171b} 15 ~171b 18 , 171b ₁₁ , 171b ₂₂ , the vertical direction passing through the center of gravity COG (FIG. 1) of the transformer structure in a plane (XZ plane) perpendicular to the arrangement direction (Y-axis direction) of the molded coils 13a, 13b, 13c ( They are provided at positions S ₁ and S ₂ (FIG. 1) that form angles in the range of 15 degrees to 25 degrees in both positive and negative directions with respect to the straight line c _p -c _p (FIG. 1) in the ± Z axis direction. On the other hand, the holes 171a _{12 to} 171a ₂₅ and the holes 171b _{12 to} 171b ₂₅ are provided at positions that form angles exceeding 25 degrees in both the positive and negative directions with respect to the straight line c _p -c _p (FIG. 1).

Further, in FIG. _{8, 151a 11, 151a 12,} 151b 11, 151b 12, 151c 11, 151c 12, 151d 11, 151d 12 and _{151a 21, 151a 22, 151b 21} , 151b 22, 151c 21, 151c 22, 151d 21 , 151d ₂₂ are base member reinforcing members, each of which is provided in the hollow portion of the hollow member portion 15b of the base member 15, and against the load in the vertical direction (Z-axis direction) of the hollow member portion 15b of the base member 15. Reinforce strength. Of these, the base member reinforcing members 151a ₁₁ , 151a ₁₂ , 151a ₂₁ , 151a ₂₂ are formed of the coil 13a on a plane (XY plane) perpendicular to the coil axis c _a -c _a (FIG. 1) of the molded coil 13a. The base member reinforcing members 151b ₁₁ , 151b ₁₂ , 151b ₂₁ , 151b ₂₂ are arranged at positions in the orthographic projection area, and are planes (XY plane) perpendicular to the coil axis c _b -c _b (FIG. 1) of the molded coil 13b. The base member reinforcing members 151c ₁₁ , 151c ₁₂ , 151c ₂₁ , 151c ₂₂ are arranged on the coil axis c _c -c _c (FIG. 1) of the molded coil 13c. The coil 13c is arranged at a position in the orthographic projection area on a perpendicular plane (XY plane).

  Also in the earthquake-resistant mold transformer 3 of the third embodiment, the end face holding structure of each mold coil, the winding start end of the secondary winding connected to the secondary winding connection terminal, and the drawing of the winding end end The structure of the wire splitting structure and the structure in which each lead wire root portion is fixed by a resin, and the structure of the connection bar for the primary side winding connection are the earthquake-resistant molds of the first embodiment described in FIGS. It is assumed that the configuration is the same as that of the transformer 1.

As a result of the earthquake resistance test, it was confirmed that the earthquake resistant mold transformer 3 of the third embodiment also has the performance of the earthquake resistance class As. In the seismic test, the seismic mold transformer 3 is fixed to the base 100 (FIG. 1) through bolts in each hole of the base member 15 as in the case of the seismic mold transformer 1 of the first embodiment. The foundation 100 was excited at an acceleration of 0.1 G, and the vibration generated at the tip end in the Z-axis direction of the earthquake-resistant mold transformer 2 at this time was measured. As a result, the natural frequency in the ± Y-axis direction is 24.0 Hz, the vibration acceleration in the same direction is 1.79 G (response magnification = 17.9), the natural frequency in the ± X-axis direction is 27.4 Hz, The vibration acceleration is 0.67 G (response magnification 6.7), and the natural frequency in any direction exceeds the reference value (20 Hz) of the earthquake resistance class As, and the performance is in the range of the earthquake resistance class As. However, in the case of the earthquake-resistant mold transformer 3 of the third embodiment, at the positions S ₁ and S ₂ (FIG. 1), the four holes 171a ₁₁ , 171a ₂₆ , 171b ₁₁ provided at the positions, The base member 15 is fixed by 171b ₂₆ , and the number of fixing points at the position is more than that of the earthquake-resistant mold transformer 1 of the first embodiment and the earthquake-resistant mold transformer 2 of the second embodiment. Few. For this reason, the earthquake-resistant mold transformer 3 of the third embodiment is excited by vibration acceleration as compared with the earthquake-resistant mold transformer 1 of the first embodiment and the earthquake-resistant mold transformer 2 of the second embodiment. High response magnification to acceleration and low earthquake resistance.

  Also in the earthquake-resistant mold transformer 3 of the third embodiment, the holding structure of the end face of the molded coil, the split structure of the lead wire at the winding start end and the winding end of the secondary side winding, and the filling structure with resin, and The seismic resistance of each part is improved by the holding structure of the connection bar 25 and the annealed copper wire structure, and also in this respect, the seismic class As is satisfied.

  The earthquake resistant As class can be satisfied also by the earthquake resistant mold transformer 3 of the third embodiment of the present invention. Further, since the base member 15 has a configuration including a hollow material portion 15b having a U-shaped or U-shaped cross section and having a hollow portion formed therein, the base member 15 is lightweight, simple, and low. A costly configuration can be obtained.

  FIG. 9: is a top view which shows the fixed position to the base of the base member in the earthquake-proof type transformer as a 4th Example of this invention. The earthquake-resistant mold transformer of the fourth embodiment is also the same as the earthquake-resistant mold transformer 1 of the first embodiment except for the positions and number of fixing holes in the base member. It shall have. The number of the holes is smaller than that of the earthquake-resistant mold transformer 1 of the first embodiment, and all of the holes are provided at positions close to the lower metal fitting. The constituent elements of the seismic mold transformer of the fourth embodiment used in the following description are the same as those of the first embodiment except for the reference numerals of the fixing holes in the base member. The same reference numerals as in the case of are used.

In FIG. 9, reference numerals 171a _{11 to} 171a ₂₀ and 171b _{11 to} 171b ₂₀ respectively denote the base 100 (FIG. 1) of the installation place of the earthquake-resistant mold transformer of the fourth embodiment (hereinafter denoted by reference numeral 4 for convenience). ) Are holes (a total of 20 holes) for passing bolts as fixing screws. Among them, one of the ten holes 171a _{11 to} 171a ₂₀ is provided at a position spaced in the + X-axis direction from the lower metal fitting 12, and the other ten holes 171b _{11 to} 171b ₂₀ are -X from the lower metal fitting 12. It is provided at a position spaced apart in the axial direction. The holes 171a _{11 to} 171a ₂₀ and the holes 171b _{11 to} 171b ₂₀ are provided so that the holes 171a ₁₁ and 171b ₁₁ are substantially symmetrical with respect to the lower metal fitting 12, and the holes 171a ₁₂ and 171b ₁₂ are formed in the lower metal fitting 12. The holes 171a ₂₀ and the holes 171b ₂₀ are provided at substantially symmetrical positions with respect to the lower metal fitting 12, and are provided at positions substantially symmetrical with respect to the lower metal fitting 12, respectively. It has been. Furthermore, among the holes _171a 11 _{~171a 20,} holes 171a ₁₁ is disposed on the flat portion 15a ₁ of the base member 15, the hole _171a 12 _{~171a 19} is provided in the hollow member portion 15b of the base member 15, the hole 171a ₂₀ is arranged in the plane portion 15a _2. Similarly, of the holes 171b _{11 to} 171b ₂₀ , the hole 171b ₁₁ is provided in the flat surface portion 15a ₁ in the base member 15, and the holes 171b _{12 to} 171b ₁₉ are provided in the hollow material portion 15b in the base member 15. 171b ₂₀ is provided on the flat portion 15a ₂ . These holes 171a _{11 to} 171a ₂₀ , 171b _{11 to} 171b ₂₀ are holes 171a _{15 to} 171a ₁₈ , 171a ₁₁ , 171a ₂₂ , 171b _{15 to} 171b ₁₈ , 171b in the case of the earthquake-resistant mold transformer 1 of the first embodiment. ₁₁ , 171 b ₂₂ , the vertical direction (± Z) passing through the center of gravity COG (FIG. 1) of the transformer structure in a plane (XZ plane) perpendicular to the arrangement direction (Y-axis direction) of the mold coils 13 a, 13 b, 13 c. It is provided at positions S ₁ and S ₂ (FIG. 1) that form angles in the range of 15 degrees to 25 degrees in both positive and negative directions with respect to the straight line c _p -c _p (FIG. 1) in the axial direction. Furthermore, the holes 171a ₁₂ and 171b ₁₂ are provided in the orthographic projection region of the coil 13a in a plane (XY plane) perpendicular to the coil axis c _a (FIG. 1) of the molded coil 13a, and the holes 171a ₁₅ , 171a ₁₆ , 171b ₁₅ and 171b ₁₆ are provided in the orthographic projection area of the coil 13b on a plane (XY plane) perpendicular to the coil axis c _b (FIG. 1) of the mold coil 13b. The holes 171a ₁₉ and 171b ₁₉ 13c is provided in the orthographic projection region of the coil 13c on a plane (XY plane) perpendicular to the coil axis c _c (FIG. 1).

Further, in FIG. _{9, 151a 11, 151a 12,} 151b 11, 151b 12, 151c 11, 151c 12, 151d 11, 151d 12 and _{151a 21, 151a 22, 151b 21} , 151b 22, 151c 21, 151c 22, 151d 21 , 151d ₂₂ are base member reinforcing members, each of which is provided in the hollow portion of the hollow member portion 15b of the base member 15, and against the load in the vertical direction (Z-axis direction) of the hollow member portion 15b of the base member 15. Reinforce strength. Of these, the base member reinforcing members 151a ₁₁ , 151a ₁₂ , 151a ₂₁ , 151a ₂₂ are formed of the coil 13a on a plane (XY plane) perpendicular to the coil axis c _a -c _a (FIG. 1) of the molded coil 13a. The base member reinforcing members 151b ₁₁ , 151b ₁₂ , 151b ₂₁ , 151b ₂₂ are arranged at positions in the orthographic projection area, and are planes (XY plane) perpendicular to the coil axis c _b -c _b (FIG. 1) of the molded coil 13b. The base member reinforcing members 151c ₁₁ , 151c ₁₂ , 151c ₂₁ , 151c ₂₂ are arranged on the coil axis c _c -c _c (FIG. 1) of the molded coil 13c. The coil 13c is arranged at a position in the orthographic projection area on a perpendicular plane (XY plane).

  Also in the seismic mold transformer 4 of the fourth embodiment, the end face holding structure of each mold coil, the winding start end of the secondary winding connected to the secondary winding connection terminal, and the drawing of the winding end end The structure of the wire splitting structure and the structure in which each lead wire root portion is fixed by a resin, and the structure of the connection bar for the primary side winding connection are the earthquake-resistant molds of the first embodiment described in FIGS. It is assumed that the configuration is the same as that of the transformer 1.

  As a result of the earthquake resistance test, it was confirmed that the earthquake resistant mold transformer 4 of the fourth embodiment also has the performance of the earthquake resistance class As. In addition, by the holding structure of the end surface of the mold coil, the split structure of the lead wire at the winding start end and the winding end of the secondary side winding, and the filling structure with resin, and the holding structure of the connection bar 25 and the soft copper wire structure, The earthquake resistance of each part is improved, and the earthquake resistance class As is satisfied also in this respect.

The earthquake-resistant As class can be satisfied also by the earthquake-resistant mold transformer 4 of the fourth embodiment of the present invention. In particular, since the base member 15 is fixed to the base stand 100 by the position _S 1, the hole provided in the _{S 2 171a 11 ~171a 20, 171b} 11 ~171b 20 and a bolt passing through these figures 1, the base member The plane area of 15 can be reduced, and the earthquake resistance As class can be satisfied in a state where the installation plane area is small. Further, the base member 15 can be reduced in size and weight. Further, since the base member 15 has a configuration including a hollow material portion 15b having a U-shaped cross-section and a hollow portion formed therein, the weight of the base member 15 can be reduced also in this respect. Furthermore, the base member 15 can be configured simply and at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the earthquake-resistant type transformer as a 1st Example of this invention. It is a top view which shows the fixed position to the base stand of the base member in the earthquake-proof type transformer of FIG. It is explanatory drawing of the reinforcement member for base members of the earthquake-resistant mold transformer of FIG. It is explanatory drawing of the pressing structure of the mold coil in the earthquake-resistant type transformer of FIG. It is explanatory drawing of the lead-out line of the winding start end of a secondary side coil | winding in the earthquake-resistant type transformer of FIG. It is explanatory drawing of the connection bar in the earthquake-resistant mold transformer of FIG. It is a top view which shows the fixing position to the base stand of the base member in the earthquake-resistant mold transformer as a 2nd Example of this invention. It is a top view which shows the fixed position to the base stand of the base member in the earthquake-resistant mold transformer as a 3rd Example of this invention. It is a top view which shows the fixed position to the base stand of the base member in the earthquake-resistant mold transformer as a 4th Example of this invention.

Explanation of symbols

1, 2, 3, 4 ... Earthquake-resistant mold transformer,
11 ... Upper bracket,
12 ... Lower bracket,
13a, 13b, 13c ... Mold coil,
131a: Primary winding of the molded coil,
131b ... secondary winding of the molded coil,
131b ₁ , 131b ₁₁ , 131b ₁₂ ... a lead wire at the winding start end of the secondary winding,
131b ₂ , 131b ₂₁ , 131b ₂₂ ... a lead wire at the winding end of the secondary winding,
132a, 132b, 132c ... recessed portion of the molded coil,
133a, 133b, 133c ... coil holding member,
14 ... Iron core,
15 ... Base member,
15a ₁ , 15a ₂ ... the flat surface of the base member
15b ... the hollow member of the base member,
_{151a 11, 151a 12, 151b 11} , 151b 12, 151c 11, 151c 12, 151d 11, 151d 12, 151a 21, 151a 22, 151b 21, 151b 22, 151c 21, 151c 22, 151d 21, 151d 22 ... base member Reinforcing members,
1511 ... bolts,
1512 ... nuts,
16a, 16b ... inverted V-shaped reinforcing member,
161a ₁ , 161b ₁ , 161b ₂ ... a support member for an inverted V-shaped reinforcing member,
171a ₁₁ , 171a ₂₈ , 171b ₁₁ , 171b ₂₈ ... hole,
COG ... center of gravity,
18 ... Secondary winding connection terminal,
21 ... Secondary winding connection,
25, 25a, 25b, 25c ... the connection bar of the primary side winding of the molded coil,
30 ... resin,
40a, 40b, 40c, 40d ... spacer,
41a, 41b, 41c, 41d ... tape,
100 ... Foundation stand.

Claims (6)

An earthquake-resistant mold transformer in which a plurality of mold coils are incorporated in an iron core,
An upper fitting fixed to the iron core above the plurality of molded coils, to which a secondary winding connection terminal for connecting a lead wire of a secondary winding of the plurality of molded coils is attached;
A lower metal fitting that is arranged along the arrangement direction of the plurality of mold coils below the plurality of mold coils and is fixed to the iron core to support the iron core,
Fixing to the lower part of the lower metal fitting, comprising a hollow material part with a U-shaped or square cross-section and a hollow part formed inside, and fixing the transformer to the base of the installation site A plurality of holes for passing the screws for use are provided at positions spaced from the lower metal fittings on both sides of the lower metal fitting in a plane perpendicular to the coil axis of the mold coil, and at least one of the plurality of holes. In a plane perpendicular to the arrangement direction of the plurality of molded coils, the part is a vertical straight line passing through the center of gravity of the transformer structure composed of the molded coil, the iron core, the upper metal fitting, and the lower metal fitting. A base member provided at a position in the range of 15 degrees to 25 degrees in both positive and negative directions,
An inverted V-shaped reinforcing member connecting the upper metal fitting and the base member;
And a seismic-resistant mold transformer, characterized in that the natural frequency in the installed state fixed to the base of the installation location is 20 Hz or more.   2. The earthquake-resistant structure according to claim 1, wherein the base member has a configuration in which a part of the plurality of holes is provided in a normal projection region of the mold coil in a plane perpendicular to the coil axis of the mold coil. Type mold transformer.   The base member reinforces the strength against the vertical load of the hollow material portion at a position within the orthographic projection region of the mold coil in a plane perpendicular to the coil axis of the mold coil in the hollow portion of the hollow material portion. The earthquake-resistant mold transformer according to claim 1, wherein the reinforcing member is provided with a reinforcing member.   The mold coil has a configuration in which a concave portion is formed on an end surface in a coil axial direction, and a coil pressing member that is fixed to the upper metal fitting and increases the rigidity of the molded coil in the coil axial direction is fitted in the concave portion. Item 4. The earthquake-resistant mold transformer according to item 1, 2 or 3.   In the molded coil, each of the lead wire at the winding start end and the lead wire at the winding end of the secondary winding connected to the secondary winding connection terminal is divided, and each divided lead wire is divided. 4. The earthquake-resistant mold transformer according to claim 1, 2 or 3, wherein a resin is filled in the periphery of   A plurality of the mold coils are provided, a plurality of connection bars for connecting the primary windings of the coils are made of annealed copper wires, and the connection bars are held in a state of being separated from each other. The earthquake-resistant mold transformer as described in 1, 2 or 3.

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