Strip arrangement for mutually supporting two components arranged one inside the other

Abstract

The invention relates to a strip arrangement (1) for mutually supporting two components arranged one inside the other, in particular for mutually supporting transformer windings (5, 7), wherein the strip arrangement (1) comprises two strips (21, 23) arranged with their longitudinal directions (25, 27) parallel to one another and is designed to convert a relative movement of the strips (21, 23) with respect to one another along their longitudinal directions (25, 27) into an increase in the thickness (17) of the strip arrangement (1). In order to prevent large sections in which the two components are not sufficiently mutually supported from being produced, provision is made for the strip arrangement (1) to have at least two ramps (43), wherein each ramp (43) is formed in a lateral surface (29, 31) of one of the two strips (21, 23), and wherein each ramp (43) is assigned a run-on element (51) which is formed in a lateral surface (29, 31) of the other strip (21, 23) and is designed to slide along the associated ramp (43).

Description

[0001] 2023PF12516 1 Description Strip arrangement for the mutual support of two components arranged one inside the other. The invention relates to a strip arrangement for the mutual support of two components arranged one inside the other, in particular for the mutual support of transformer windings. The strip arrangement comprises two strips arranged with their longitudinal directions parallel to one another and is designed to convert a relative movement of the strips to one another along their longitudinal directions into an increase in the thickness of the strip arrangement. The invention also relates to a winding arrangement consisting of two transformer windings arranged one inside the other, which can be arranged around a common core. The above-mentioned strip arrangement is known, for example, from transformer construction, in particular in the area of ​​the winding structure of an active part, i.e. the insulation structure between two transformer windings arranged around the same core leg.The so-called leakage channel extends between two transformer windings, which can be arranged around the same core. An insulation structure made up of strips and cylinders is often built up in this leakage channel. Since the transformer windings are placed one on top of the other from above, the structures in the leakage channel must always be undersized. However, some transformers require a tighter structure between the transformer windings, as radial forces that arise during transformer operation must be better supported, for example in the event of a short circuit. To achieve this tighter structure, so-called wedge strips are known, which are driven in from above after the two transformer windings have been placed. The two transformer windings are usually constructed as a hollow cylinder, with the smaller of the transformer windings inserted inside the larger one.The two transformer windings are usually arranged coaxially to each other. One of the strips can, for example, consist of a wedge-shaped lower part, the so-called "slide", which is first mounted in the leakage channel. The other strip can be a long wedge that is driven in from above. These two counter-rotating wedges, or wedge strips, move away from each other, at least with their outer sides, when they are moved relative to each other along their longitudinal directions. The thickness of the strip arrangement therefore increases. This presses the strips between the transformer windings in the leakage channel, making the structure between the transformer windings more rigid. One wedge strip forms a ramp along which the other wedge strip can slide.The thickness of the strip arrangement refers to the thickness of the adjacent strips in a direction between the two transformer windings, in particular a radial direction relative to the common axis of the two transformer windings. However, these long wedge strips have the disadvantage that the first third of the strips can be driven in very easily at the beginning of installation, but the last third of the strips are then very difficult to install. This means that despite careful driving in of the strips, even when maintaining a cross-sectional sequence, the strips cannot be installed evenly all the way to the bottom. It may happen that protruding strips have to be chiseled off. This can lead to at least one strip arrangement in the stray channel having a section in which the strips lie against one another and support the two transformer windings.However, there is also a second section along the longitudinal direction of the strips, in which the strips do not abut one another or into which one of the strips does not even extend. In this area, there is no mutual support of the two transformer windings. This unsupported area can cause problems during transformer operation. Therefore, the object of the invention is to provide a strip arrangement that is easy to assemble and by which such sections in which the two components are not sufficiently supported can be avoided. This object is achieved according to the invention by the strip arrangement according to claim 1 and a winding arrangement according to claim 11. Advantageous embodiments are the subject of the dependent claims.According to the invention, the strip arrangement has at least two ramps, each ramp being formed in a side surface of one of the two strips, and each ramp being assigned a run-up element which is formed in a side surface of the other strip and is designed to slide along the associated ramp. For the winding arrangement, at least one strip arrangement according to the invention is arranged between the two transformer windings. Because the strip arrangement has a plurality of ramps, the strip arrangement is divided into a plurality of sections in which the two strips rest against one another and can support the two transformer windings against one another. This avoids the two sections described above, which can arise when using wedge strips.Instead, the unsupported sections are distributed over the length of the strips, thereby avoiding large, continuous, unsupported sections. 2023PF12516 4 The term “strip” in this text refers to an elongated, straight structure that extends along a longitudinal direction. The term “transformer winding” is also intended to include a winding in another electrical system in which windings based on the transformer principle are used, for example in a saturable reactor. The two strips of the strip arrangement are arranged with their longitudinal directions running parallel to one another, at least in a pre-assembly position and in an assembly position of the strip arrangement. The side surface of one strip is preferably arranged opposite the side surface of the other strip. Particularly preferably, the two side surfaces lie against one another.In each case, a run-up element is in contact with the associated ramp. The run-up element can slide along the ramp during assembly. The pre-assembly position refers to a position of the two strips relative to one another at a time before the relative movement of the two strips relative to one another begins. In the pre-assembly position, the strip arrangement is preferably already arranged between the transformer windings. The relative movement of the strips relative to one another and the associated increase in thickness has not yet occurred in this state, however. The assembly position is the position in which the relative movement and the associated increase in thickness is complete. In the assembly position, the two strips are pressed firmly against one another and support the transformer windings against one another. Advantageous embodiments of the invention are described in more detail below.The features described in connection with these embodiments can be combined with one another as desired. Individual features of the embodiments described below can also be omitted if the effect of this feature is not important in a specific application. The strips of the strip arrangement according to the invention are preferably made of wood, paper, cardboard, pressboard or another electrically insulating and non-magnetizable material commonly used in transformer construction. According to a first advantageous embodiment of the strip arrangement, the two strips can be offset from one another, at least in the pre-assembly position, such that the overall thickness of the strip arrangement is at a minimum. Thus, the run-up elements can each be located at the lowest areas of the respective ramps. As a result, the strip arrangement can experience the greatest increase in thickness during assembly.The overrun elements can slide along their respective ramps during assembly, i.e. during the relative movement of the two strips. The thickness of the strip arrangement can increase continuously. Each overrun element preferably projects from the strip on which it is arranged, in the direction of the ramp belonging to this overrun element. This allows unhindered interaction between the overrun element and the ramp to be achieved. Each ramp preferably runs obliquely to a longitudinal direction of the associated strip, in particular with a long side, wherein the side surface of the strip in the region of the ramp, in particular through the long side, forms an acute angle with the longitudinal direction of the strip. The ramps are preferably arranged one behind the other in the longitudinal direction of the strips. Particularly preferably, all ramps of the strip arrangement have the same orientation.2023PF12516 6 Likewise, all ramps of the strip arrangement preferably have identical dimensions within the manufacturing tolerances. According to a particularly preferred embodiment of the strip arrangement, all ramps are arranged on the same strip. For example, one of the strips can have exclusively ramps and the other strip exclusively overrun elements. The ramps on a strip can form a sawtooth profile. The sawteeth extend along and transversely to the longitudinal direction of the strip. The profile of the strip is viewed in a direction transverse to the longitudinal direction. According to a particularly advantageous embodiment of the strip arrangement, at least one of the overrun elements itself can be designed as a ramp.The ramp-shaped run-up element can accordingly rest against the ramp of the other strip belonging to this run-up element, so that a displacement of the strips parallel to their longitudinal directions causes the two ramps to slide along one another in such a way that the two strips are pushed away from one another, thus increasing the thickness of the strip arrangement. Naturally, the two opposing ramps are oriented in opposite directions for this purpose. Preferably, all run-up elements are designed as ramps. According to an advantageous embodiment, both strips are provided with a plurality of complementarily shaped ramps. Particularly preferably, each of the two ramps is provided with a sawtooth profile, wherein the sawtooth profiles of both strips are complementary to one another. This allows for particularly uniform support of the two strips from one another.The ramps of both strips preferably have the same length and the same height, where the length refers to the longitudinal direction of the strips and the height refers to the direction of the thickness of the strip arrangement. In order to hold the two strips of the strip arrangement in a predefined pre-assembly position, the strip arrangement can have a transport lock, in particular a releasable one, by means of which the two strips are held together at least in a transport state of the strip arrangement. The transport state can correspond to the pre-assembly position. The two strips are preferably positioned relative to one another such that the thickness of the strip arrangement is at a minimum. In order to obtain a simply constructed transport lock, the transport lock can comprise at least one bandage extending around both strips, in particular a paper bandage.The bandage is preferably attached to at least one of the two strips, for example by means of spot gluing. In order to prevent the two strips from shearing apart during assembly, the strip arrangement can comprise at least one guide arrangement by means of which the two strips can be guided during movement parallel to their longitudinal directions, in particular from the pre-assembly position into the assembly position. The guide arrangement can in particular have guide structures that complement one another. 2023PF12516 8 A particularly simple but effectively constructed guide arrangement can be obtained in that at least one elongated hole is provided in one of the strips and at least one projection in the other strip, wherein the at least one projection projects into the elongated hole at least in the pre-assembly position. The projection preferably also remains in the elongated hole in the assembly position.The elongated hole extends with a longitudinal extent preferably parallel to the longitudinal direction of the two strips and penetrates the strip parallel to the direction of the thickness of the strip arrangement. Instead of an elongated hole, a groove or other suitable structure can also be provided. The at least one projection can, for example, be formed by a pin that projects into the elongated hole. The pin can extend transversely to the longitudinal direction of the strip to which it is attached, away from this and project into the elongated hole in the other strip. The guide arrangement prevents the strips from slipping sideways off one another during assembly. To further explain the invention, reference is made in the following part of the description to figures from which further advantageous details and possible areas of application of the invention can be seen.The figures are to be understood as examples and are intended to illustrate the nature of the invention but in no way restrict it or represent it exhaustively. The same reference numerals are always used for elements with the same structure and / or the same function. 2023PF12516 9 They show: Fig. 1 a schematic perspective view of a winding arrangement with several merely indicated strip arrangements; Fig. 2 a sectional view of a strip arrangement according to the prior art between two transformer windings; Fig. 3 a strip arrangement according to the invention between two transformer windings; Fig. 4 a guide arrangement on a strip arrangement according to the invention in a schematic sectional view; Fig. 5 a transport lock on a strip arrangement according to the invention in a schematic sectional view; and Fig. 6 a schematic sectional view of a strip arrangement in which only one of the strips is provided with ramps.In the following, the preferred application of a strip arrangement 1 according to the invention is first described using a winding arrangement 3 of a transformer (not shown) with reference to Figure 1. Figure 1 does not yet show any details of the strip arrangement 1 according to the invention. These are described further below with reference to Figures 3 to 6. Even if the winding arrangement 3 represents the preferred field of application of the strip arrangement 1 according to the invention, the strip arrangement 1 can also be used in other areas, in particular within electrical systems, for the mutual support of components arranged one inside the other. The winding arrangement 3 comprises two transformer windings arranged one inside the other, namely a low-voltage winding 5 and a high-voltage winding 7. The low-voltage winding 5 has a smaller diameter than the high-voltage winding 7 and is arranged within the high-voltage winding 7.The low-voltage winding 5 and the high-voltage winding 7 are referred to below as windings 5 ​​and 7, respectively. Each winding 5, 7 preferably has a hollow cylindrical shape overall. The two windings 5 ​​and 7 are preferably arranged coaxially to one another and run with their respective longitudinal axes along a central longitudinal axis 9 of the winding arrangement 3. An iron core 11 can also run along the central longitudinal axis 9, which is preferably arranged coaxially to the windings 5 ​​and 7. Both windings 5 ​​and 7 run around the iron core 11. Consequently, the iron core 11 is arranged within the low-voltage winding 5. It may be necessary to mutually support the two windings 5 ​​and 7. For this purpose, at least one, but preferably several, strip arrangements 1 are introduced into the space between the two windings 5 ​​and 7. This space is referred to as the stray channel 13. In Fig.1, only four strip arrangements 1 are shown by way of example. Preferably, however, a plurality of strip arrangements 1 are provided, which are arranged next to one another in the scattering channel 13 along a circumferential direction U of the 2023PF12516 11 winding arrangement 3. The strip arrangements 1 are preferably arranged with their respective longitudinal axes 15 parallel to the central longitudinal axis 9 of the winding arrangement 3. To ensure a firm fit of the two windings 5 ​​and 7, the strip arrangements 1 are preferably pressed between the two windings 5 ​​and 7. To achieve sufficient pressing, each strip arrangement 1 is preferably designed to change its thickness 17, in particular to increase it. This will be discussed further below with reference to Figures 3 to 6.The thickness 17 is measured along a direction that runs parallel to a surface normal 19 on the low-voltage winding 5 in the area in which the strip arrangement 1 rests against it. Consequently, the direction of the thickness 17 runs along a radial direction R with respect to the central longitudinal axis 9 of the winding arrangement 3. Each strip arrangement 1 consists of two strips 21 and 23. The two strips 21 and 23 of a strip arrangement 1 are arranged one behind the other in the winding arrangement 3 along the radial direction R. By way of example only, in Fig. 1 the radially inner strip, i.e., the one resting against the low-voltage winding 5, is identified by the reference numeral 21 and the radially outer strip, i.e., the one resting against the high-voltage winding 7, is identified by the reference numeral 23.Further elements, in particular stationary bars and / or hollow cylindrical elements, can be arranged between the bar 21 and the low-voltage winding 5 and / or between the bar 23 and the high-voltage winding 7. 2023PF12516 12 Each bar 21 and 23 extends along a longitudinal direction 25 or 27 (not yet shown in Fig. 1). The bars 21 and 23 of a bar arrangement 1 are each arranged in the scattering channel 13 such that their longitudinal directions 25 and 27 run parallel to the longitudinal axis 15 of the bar arrangement 1 formed by these bars 21 and 23 and thus parallel to the central longitudinal axis 9 of the winding arrangement 3. The bar 21 preferably rests with its side surface 29 against the side surface 31 of the bar 23.The strips 21 and 23 are preferably made of wood, paper, cardboard, pressboard or another electrically insulating and non-magnetizable material commonly used in transformer construction. A winding arrangement from the prior art is briefly discussed below with reference to Fig. 2. The winding arrangement 3 has the low-voltage winding 5 and the high-voltage winding 7, only a part of which is shown in a sectional view. The windings 5, 7 are preferably hollow cylindrical as shown in Fig. 1. The stray channel 13 extends between the windings 5 ​​and 7. Further hollow cylindrical structures 33 and / or strips 35 can be arranged in the stray channel 13. The structures 33 and strips 35 are preferably made of wood, paper, cardboard, pressboard or another electrically insulating and non-magnetizable material commonly used in transformer construction.In order to achieve mutual support of the windings 5 ​​and 7, a first wedge bar 37 is inserted into the free space in the scattering channel 13. 2023PF12516 13 Subsequently, a second wedge bar 39, the wedge shape of which is opposite to the shape of the first wedge bar 37, is introduced into the scattering channel 13. Fig. 2 shows the insertion of the wedge bar 39 from above into the scattering channel 13. The wedge bar 39 can be moved downwards into the scattering channel 13 by pressure and / or blows. The side surfaces of the wedge bars 37 and 39 slide along one another during assembly. Due to the wedge shape of the two wedge bars 37 and 39, the thickness 17 of the arrangement consisting of the two bars continuously increases as the wedge bar 39 is moved further into the scattering channel 13. This creates pressure between the two windings 5 ​​and 7. The pressure can be mediated by the structures 33 and strips 35.From a certain point onwards, further movement of the wedge strip 39 into the scattering channel 13 is no longer possible. If the wedge strip 39 has not been moved downwards sufficiently far in this position, as shown in Fig. 2, a section 41 remains in the lower area in which no pressure can be generated by the two wedge strips 37 and 39. In section 41, the windings 5 ​​and 7 are therefore not mutually supported. This problem is remedied by the strip arrangement 1 according to the invention, which is described below with reference to Fig. 3. Fig. 3 shows an embodiment of a winding arrangement 3 according to the invention. The illustration corresponds to the prior art arrangement described with 2023PF12516 14 with reference to Figure 2. The strip arrangement 1 according to the invention has the two strips 21 and 23. In contrast to the wedge strip 37 from the prior art, the strip 21 is not wedge-shaped.Instead, the strip 21 is provided with a plurality of ramps 43 which extend into the side surface 29, or whose surfaces form the side surface 29. The ramps 43 each have a long side 45 which forms a slope, and a short side 47 which runs perpendicular to the longitudinal direction 25 of the strip 21 and connects the upper part of a long side 45 with the lower part of the long side 45 of an adjacent ramp 43. The long sides 45 of the ramps 43 form an acute angle with the longitudinal direction 25 of the strip 21. The ramps 43 of the strip 21 are each oriented in the same direction. In other words, the long sides 45 of the ramps 43 are arranged parallel to one another. Preferably, the long sides 45 of the ramps 43 of the strip 21 each have the same length. Likewise, the short sides 47 of the ramps 43 of the strip 21 preferably each have the same length. Consequently, the ramps 43 of the strip 21 have the same shape and size.The ramps 43 are preferably arranged in a row along the longitudinal direction 25 of the strip 21. The shape and arrangement of the ramps 43 of the strip 21 form an overall sawtooth profile 49. The second strip 23 of the strip arrangement 1 is provided with ramp elements 51, each of which is assigned to a ramp 43 of the strip 21. Each ramp element 51 can slide along the long side 45 of the ramp assigned to this ramp element 51. Preferably, each ramp element 51 is itself formed as a ramp 43. Particularly preferably, the ramps 43 of the strip 23 are formed complementarily to the ramps 43 of the strip 21. Thus, the strips 21 and 23 have mutually complementary sawtooth profiles 49. The function of the strip arrangement 1 according to the invention is described below. The strip arrangement 1 can be brought into a pre-assembly position 53, which preferably takes place before the two strips 21 and 23 are inserted into the scattering channel 13.In particular, the pre-assembly position 53 can already be set at the factory and the strip arrangement 1 can be transported in the pre-assembly position 53. It can then be inserted directly into the spreading channel 13. In the pre-assembly position 53, the thickness 17 of the strip arrangement 1 is at a minimum. The position of the ramps 43 in the pre-assembly position 53 is indicated by dashed lines for one of the ramps 43 in Fig. 3. If the strip arrangement 1 is arranged in the spreading channel 13, one of the strips 21, 23 can be supported at one end. The other strip can then be moved at its opposite end relative to the supported strip such that the ramps 43 of the two strips 21, 23 slide along one another. The supported strip is not moved. When the bars 21, 23 are moved relative to each other, the ramps 43 of one bar are moved up the corresponding ramps 43 of the other bar.The thickness 17 of the strip arrangement 1 continuously increases and the 2023PF12516 16 strip arrangement 1 is pressed into the stray channel 13. As a result, the windings 5, 7 are mutually supported. As soon as the strips 21, 23 are pressed in so firmly that further relative movement is no longer possible without damaging the strip arrangement 1 or the winding arrangement 3, the assembly position 55 of the strip arrangement 1 is reached. Since the strips 21, 23 have several ramps 43 along their longitudinal directions 25, 27, unsupported sections 41, if they occur at all, are distributed over the length of the strip arrangement 1 in the assembly position 55. Furthermore, the unsupported sections 41 are smaller than the unsupported section 41 when using two wedge strips 37, 39, as described with reference to Fig. 2.The strip arrangement 1 according to the invention can in particular prevent an unsupported section 41 from forming at a longitudinal end of the winding arrangement 3, the size of which section represents a problem for the winding arrangement 3. Fig. 4 shows an embodiment of a guide arrangement 57 for a strip arrangement 1. The guide arrangement 57 can have an elongated hole 59 in one of the strips, shown here as an example in strip 21, and a projection 61 in the other strip 23. The projection 61 is preferably shaped as a pin 63 and projects into the elongated hole 59. The elongated hole 59 extends parallel to the longitudinal axis 15 of the strip arrangement 1. The projection 61 is movably received in the elongated hole 59, so that a relative movement of the strips 21 and 23 parallel to the longitudinal axis 15 is possible. In a direction that is transverse to the longitudinal axis 15 and transverse to the direction of the thickness 17, however, the movement is prevented.This prevents the strips 21, 23 from slipping off one another or from shearing apart. The strip arrangement 1 preferably has a plurality of guide arrangements 57 along its longitudinal axis 15. Fig. 5 shows an embodiment of a transport lock 65 for the strip arrangement 1. The transport lock 65 is designed to hold the two strips 21, 23 together at least in a transport state 66. The transport state 66 can correspond to the pre-assembly position 53. The transport lock 65 can be designed to be releasable. The transport lock 65 can preferably be designed to allow a relative movement of the strips 21, 23 parallel to the longitudinal axis 15 upon overcoming a predefined force on one of the strips 21, 23. The transport lock 65 can be designed to hold the strips 21, 23 together during their relative movement in such a way that they do not move away from each other transversely to the longitudinal axis 15.Particularly in conjunction with the guide arrangement 57, the transport lock 65 can ensure that the strips 21, 23 can only be moved parallel to the longitudinal axis 15 and can only move away from each other to a predetermined extent. The transport lock 65 can comprise at least one bandage 67, preferably made of paper, which extends around both strips 21, 23. The bandage 67 can be attached to at least one of the two strips 21, 23, for example by spot bonding 69. 2023PF12516 18 Fig. 6 shows an example of run-up elements 51 that are not shaped as ramps 43. The run-up elements 51 are formed by projections 71 on the strip 23, which can slide along the respective ramps 43 of the strip 21.

[0002] 2023PF12516 19 Reference numerals 1 Strip arrangement 3 Winding arrangement 5 Low-voltage winding 7 High-voltage winding 9 Central longitudinal axis of the winding arrangement 11 Iron core 13 Leakage channel 15 Longitudinal axes of the strip arrangement 17 Thickness of the strip arrangement 19 Surface normal 21 Strip 23 Strip 25 Longitudinal direction of the strip 21 27 Longitudinal direction of the strip 23 29 Side surface 31 Side surface 33 Hollow cylindrical structure 35 Strips 37 Wedge strip 39 Wedge strip 41 Unsupported section 43 Ramp 45 Long side 47 Short side 49 Sawtooth profile 51 Overrun elements 53 Pre-assembly position 55 Assembly position 57 Guide arrangement 59 Slotted hole 61 Projection 63 Pin 65 Transport lock 66 Transport state 67 Bandage 69 Spot bonding 2023PF12516 20 71 Projection R Radial direction U Circumferential direction

Claims

2023PF12516 21 claims 1. Strip arrangement (1) for the mutual support of two components arranged one inside the other, in particular for the mutual support of transformer windings (5, 7), wherein the strip arrangement (1) comprises two strips (21, 23) arranged with their longitudinal directions (25, 27) parallel to one another and is designed to convert a relative movement of the strips (21, 23) to one another along their longitudinal directions (25, 27) into an increase in the thickness (17) of the strip arrangement (1), characterized in that the strip arrangement (1) has at least two ramps (43), wherein each ramp (43) is formed in a side surface (29, 31) of one of the two strips (21, 23), and wherein each ramp (43) is assigned a run-up element (51) which is formed in a side surface (29, 31) of the other strip (21, 23) is formed and designed to slide along the associated ramp (43). 2.Strip arrangement (1) according to claim 1, characterized in that the at least two ramps (43) are arranged on the same strip (21, 23).

3. Strip arrangement (1) according to claim 2, characterized in that the strip (21, 23) has a sawtooth profile (49) formed by the ramps (43).

4. Strip arrangement (1) according to one of claims 1 to 3, characterized in that at least one of the run-up elements (51) is formed as a ramp (43).

5. Strip arrangement (1) according to claim 4, characterized in that both strips (21, 23) are provided with a plurality of mutually complementary shaped ramps (43).

6. Strip arrangement (1) according to claim 5, characterized in that each of the two strips (21, 23) is provided with. 2023PF12516 22 is provided with a sawtooth profile (49), wherein the sawtooth profiles (49) of the two strips (21, 23) are complementary to one another.

7. Strip arrangement (1) according to one of claims 1 to 6, characterized in that the strip arrangement (21, 23) has a releasable transport lock (65) by which the two strips (21, 23) are held together at least in a transport state (66) of the strip arrangement (1).

8. Strip arrangement (1) according to claim 7, characterized in that the transport lock (65) comprises at least one bandage (67) extending around both strips (21, 23).

9. Strip arrangement (1) according to one of claims 1 to 8, characterized in that the strip arrangement (1) comprises at least one guide arrangement (57) by which the two strips (21, 23) can be guided during movement parallel to their longitudinal directions (25, 27).Strip arrangement (1) according to claim 9, characterized in that the guide arrangement (57) has at least one elongated hole (59) in one of the strips (21, 23) and at least one projection (61) in the other strip (21, 23), wherein the at least one projection (61) projects into the elongated hole (59) at least in a pre-assembly position (53) of the strip arrangement (1).

11. Winding arrangement (3) consisting of two transformer windings (5, 7) arranged one inside the other, which can be arranged around a common core (11), characterized in that at least one strip arrangement (1) according to one of the preceding claims is arranged between the two transformer windings (5, 7).

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