Module having a joint region and method for producing a module having a joint region

Abstract

A module (10) is provided which comprises a first module part (1) comprising a first electrical conductor (11), first foils (12) and first isolating structures (13) alternated with the first foils (12). The module (10) further comprises a second module part (2) comprising a second electrical conductor (21), second foils (22) and second isolating structures (23) alternated with the second foils (22). The module (10) further comprises a joint region (3) which includes a conductor connector (31), connecting structures (32) and an insulation material (33). The first module part (1) and the second module part (2) are joined together in the joint region (3). The conductor connector (31) mechanically and electrically connects the first electrical conductor (11) to the second electrical conductor (21). Each one of the connecting structures (32) electrically connects one of first foils (12) to one of the second foils (12). The joint region (3) is filled with the insulation material (33) for electrically isolating at least the conductor connector (31) and the connecting structures (32) from each other. Moreover, a method for producing such a module (10) is provided.

Description

[0001] P2024,0870 WO N / P240004WO01 September11,2025 -1 - Description MODULE HAVING A JOINT REGION AND METHOD FOR PRODUCNIG A MODULE HAVING A JOINT REGIONThe present disclosure relates to a module comprisi ng a jointregion and a method for producing a module having a jointregion.One challenge of joining two separate module parts, forinstance two electrical devices, for creating one s inglemodule is how to ensure the dielectric integrity of a jointregion. Another challenge is how to maintain a desi redcapacitive field grading and / or resistive field gra dingdespite the presence ofsuch jointregion.Document US 11607828 B2 describes in connection w ith afirst power cable and a second power cable which ar e placedaxially adjacent one to another and exposed by remo vingportions of upper-laying layers so as to be subsequ entlyjointed together. Each of the power cables and comp rises anelectric conductor and an insulation system surroun ding therespective electric conductor. The insulation syste mcomprises an inner thermoplastic semiconductive lay er, athermoplastic insulating layer and an outer thermop lasticsemiconductive layer. The inner thermoplastic semic onductivelayer encircles and is in direct contact with the r espectiveelectric conductor of the power cable. Each thermop lasticinsulating layer encircles and is in direct contact with therespective inner thermoplastic semiconductive layer , whereinthe outer thermoplastic semiconductive layer encirc les and isin direct contact with the respective thermoplasticinsulating layer. Each insulation system of each of the power P2024,0870 WO N / P240004WO01 September11,2025 -2 -cables is sequentially surrounded by a respective m etalscreen and by one or more outer jackets made, for e xample, ofpolyethylene.Document CN 101068075 A describes a soft joint of a cross-linked polythene cable including an inner semicondu ctivelayerand metaljacketsleeves.Documents JP H0669260 B2, JP 6861223 B2 and JP 2 999670B2 describe different examples of a joint, terminat ion orcross-connection arrangementfora cable.This disclosure discusses solutions for realizing s ufficientinsulating properties of the joint region, which ma y compriseinsulating solid, gaseous, viscous and / or fluid mat erials,and at the same time for maintaining a desired capa citivefield grading and / orresistive field grading.Embodiments of the disclosure, for instance as clai med in theindependentclaims,addressthe above shortcomings in the artin whole or in part. Further embodiments of the mod ule aswell as of the method for producing a module are su bject-matterofthe furtherclaims.According to an embodiment of a module, it comprise s a firstmodule part, a second module part and a joint regio n. Thefirst module part comprises a first electrical cond uctor,first foils and first isolating structures alternat ed withthe first foils. The second module part comprises a secondelectrical conductor, second foils and second isola tingstructures alternated with the second foils. The jo int regioncomprises connecting structures and an insulation m aterial.The first module part and the second module part ar e joined P2024,0870 WO N / P240004WO01 September11,2025 -3 -together in the joint region, wherein the first ele ctricalconductor is electrically connected to the second e lectricalconductor. Each one of the connecting structures el ectricallyconnects one of first foils to one of the second fo ils. Thejoint region is filled with the insulation material forelectrically isolating at least the connecting stru cturesfrom each other. It is also possible that the insul ationmaterialisconfigured to electricallyisolate the connectingstructures from the first and second electrical con ductors.Forexample,the insulation materialisconfigured toelectrically isolate all different conductive parts in thejoint region from each other: for instance the cond uctors,possible conductor connector, the connecting struct ures orelectricallyconductive foilsfrom each other.The connecting structure / s can be tube-like structu re / s,net / s, strand / s, web / s or wire / s. The connecting st ructurecan be a perforated tube-like structure or a perfor ated tube.Thus, the connecting structures can be perforated t ube-likestructuresorperforated tubes.It is also possible that in the joint region, the f irstelectrical conductor is in direct mechanical and th us indirect electrical contact with the second electrica lconductor. The first electrical conductor can be co nnecteddirectly to the second electrical conductor, and vi ce versa.For achieving a direct mechanical and electrical co ntactbetween the conductors, the first and second electr icalconductors can be pressed against each other, solde red orwelded together,glued togetherusing a conductive glue orconnected to each other by using connecting means l ike ascrew system etc. It is possible for the first cond uctorand / or the second conductor to have tube-like struc ture / s, P2024,0870 WO N / P240004WO01 September11,2025 -4 -wherein the first conductor may be located in place s insidethe second conductor, or vice versa. The first cond uctorand / or the second conductor may have different or v aryinginnerorouterdiametersso thatone conductorcan be pressedagainst the other conductor to form a stable mechan icaland / orelectricalconnection.According to an embodiment of a module, it comprise s a firstmodule part, a second module part and a joint regio n. Thefirst module part comprises a first electrical cond uctor,first foils and first isolating structures alternat ed withthe first foils. The second module part comprises a secondelectrical conductor, second foils and second isola tingstructures alternated with the second foils. The jo int regioncomprises a conductor connector, connecting structu res and aninsulation material.The firstmodule partand the secondmodule part are joined together in the joint region . Theconductor connector electrically connects the firstelectrical conductor to the second electrical condu ctor. Eachone of the connecting structures electrically conne cts one offirst foils to one of the second foils. The joint r egion isfilled with the insulation material for electricall yisolating atleastthe conductorconnectorand the connectingstructures from each other. Thus, the insulation ma terial canisolate conductor connector from the connecting str ucturesand at the same time can isolate the connecting str ucturesfrom each other. For instance, the insulation mater ial isconfigured to electrically isolate: between the con ductorconnector and the foils; between different foils; b etweendifferent connecting structures; between the conduc torconnector and the connecting structures; and / or bet ween thefoilsand connecting structures. P2024,0870 WO N / P240004WO01 September11,2025 -5 -The conductor connector can be in mechanical contac t with thefirst electrical conductor and / or the second electr icalconductor. Thus, the conductor connector can mechan icallyconnect and / or electrically connect the first elect ricalconductor to the second electrical conductor. The u se of theconductor connector enhances the mechanical stabili ty of anelectricalconnection between the firstand second electrical conductorsbutcan also be optional.The first foils and the second foils can be made fr om thesame or different materials. The first isolating st ructuresand the second isolating structures can be made fro m the sameor different materials. The first module part and t he secondmodule part can be two symmetric parts of the modul e. Usingthe conductor connector and / or the connecting struc turesbeing for instance perforated electrically conducti ve tubes,electrical and / or mechanical strength between the f irstmodule part and the second module part as well as a desiredcapacitive field grading and / or resistive field gra ding inthe joint region can be ensured. Moreover, due to t heperforated form ofthe connecting structuresbeing for instance conductive tubes,the jointregion can be filledwith the insulation material in a convenient way, f orinstance after a secure mechanical and electrical c onnectionbetween the first module part and the second module part hasbeen established. Regions between the conductor con nector andthe conductive connecting structures or between theconnecting structures can be impregnated with the i nsulationmaterial,forinstance with a curable orhardening insulationmaterial. Furthermore, due to a concentric arrangem ent of theconductor connector, the connecting structures bein g forinstance conductive tubesortube-like structures, and the P2024,0870 WO N / P240004WO01 September11,2025 -6 -insulation material, the mechanical stability in th e jointregion can be enhanced.According to a further embodiment of the module, th e jointregion further comprises conductive ring-like struc tures orconductive rings. For instance, each one of the con ductiverings or ring-like structures is arranged on one of the firstfoils or on one of the second foils. The connectingstructures can be electrically connected to the fir st foilsand / or to the second foils via the conductive ring- likestructures, wherein each one of the connecting stru ctures iselectricallyconnected to two differentconductive ring-likestructures. Each of the conductive ring-like struct ures canconcentricallysurround one ofthe firstorsecond foils.The ring-like structure can be a homogeneous ring o r adisconnected ring. For instance, the ring-like stru cture canbe formed by solid structures spaced apart around acircumference of the first or second foil. The ring -likestructure can be perforated or made by wire / s, web / s,strands, net etc. For example, the ring-like struct ure isconfigured to allow a liquid flow in a lateral dire ction.In the presence of the conductive ring-like structu res,mechanical and electrical connections between the f oils andthe connecting structures are improved. Moreover, a djustingvertical thicknesses of the ring-like structures ma y help tolower the electric field in the joint region. For i nstance,different ring-like structures at different vertica l levelswithin the joint region can have different thicknes ses.A vertical direction is understood to mean a direct ion whichis directed perpendicular to a main extension direc tion of P2024,0870 WO N / P240004WO01 September11,2025 -7 -the module or of the module part. A lateral directi on isunderstood to mean a direction which is parallel to the mainextension direction of the module, for instance par allel to amain extension direction of the first electrical co nductorand / or of the second electrical conductor. The vert icaldirection and the lateraldirection are orthogonal to each other.According to a further embodiment of the module, th e firstelectrical conductor is a first conductor tube. The secondelectrical conductor can be a second conductor tube . Forinstance, the conductor connector has the form of a tube, butitisnotlimited thereto.The conductorconnector can be arranged partiallywithin the firstconductortube andpartially within the second conductor tube, or vice versa.The latter case means that the first conductor tube and / orthe second conductor tube can be arranged partially withinthe conductor connector. The conductor connector ca n have theform of a tube. It is possible for the conductor co nnector tohave constant diameter or varying diameters. If the conductorconnector has varying diameters along a lateral dir ection,the fastening of the first electrical conductor and / or of thesecond electrical conductor to the conductor connec tor can besimplified. It is also possible not to use the cond uctorconnector. In this case, the first electrical condu ctor andthe second electrical conductor can be mechanically andelectrically connected to each other directly. It i s possiblefor the first electrical conductor and / or the secon delectrical conductor have constant diameter or vary ingdiameters.According to a further embodiment of the module, wi thin thejoint region, the first foils and the first isolati ng P2024,0870 WO N / P240004WO01 September11,2025 -8 -structures form a staircase-like geometrical struct ure havinglateralstepsand verticalstep faces,wherein the lateralsteps are formed by surfaces of the first foils and thevertical step faces are formed at least in places b y surfacesof the first isolating structures. Alternatively or inaddition, within the joint region, the second foils and thesecond isolating structures can form a staircase-li kegeometrical structure having lateral steps and vert ical stepfaces, wherein the lateral steps are formed by surf aces ofthe second foils and the vertical step faces are fo rmed atleast in places by surfaces of the second isolatingstructures.According to a further embodiment of the module, th e verticalstep faces are formed by inclined or curved vertica l surfacesof the first isolating structures and / or of the sec ondisolating structures.Having staircase-like geometrical structure / s in th e jointregion, stable and secure mechanical and electricalconnections of the conductor connector, the conduct ive ring-like structures and / or the connecting structures to theelectrical conductor or to the conductive foils can berealized in a simplified manner.According to a further embodiment of the module, th e jointregion further comprising at least one isolating sp acer,wherein the at least one isolating spacer is arrang ed betweentwo adjacent connecting structures or between one c onnectingstructure and the conductor connector or between on econnecting structure and one of the first and secon delectrical conductors. The at least one isolating s pacer canbe made from a material which differs from the insu lation P2024,0870 WO N / P240004WO01 September11,2025 -9 -material. The isolating spacer can be made from pap ermaterial.The module can comprise a plurality of such isolati ng spacersin the joint region. The isolating spacers are arra nged forinstance between the connecting structures and / or b etween oneconnecting structure and the conductorconnector.Here in this disclosure, a tube can mean an empty c ylinder,for instance without bottom and top surfaces. Thus, such atube can comprise a cylinder wall surrounding a cen ter line,along which the tube extends along a lateral direct ion. Thus,the tube can have a geometrical structure of a laye r which isrolled up such that opposite edges of the layers ar econnected for forming an empty cylinder. The cylind er wallcan be continuous or discontinuous or can have open ings orcan be perforated. It is also possible that along t he lateraldirection, the empty cylinder can have constant siz e orvarying sizes. The module can have a concentric arr angement,wherein each of the foils, the isolating structures , theconductive ring-like structuresand / orthe spacers can have the form ofa tube orofa tube-like structure.According to a further embodiment of the module, th e firstelectrical conductor is surrounded by the first iso latingstructures alternated with the first foils. The sec ondelectrical conductor can be surrounded by the secon disolating structures alternated with the second foi ls.According to a further embodiment of the module, th einsulation materialin the jointregion ismade up ofa solidmaterial. It is possible that the joint region is f ree ofgaseous, viscous and / or fluid materials. In this ca se, the P2024,0870 WO N / P240004WO01 September11,2025 -10 -joint region can be a dry and gas-free joint region .Furthermore, it is also possible that the joint reg ioncomprises different kind of insulation materials, f orinstance different kinds of solid, gaseous, viscous and / orfluid materials. If a dry and gas-free joint region ispreferred, the insulation material can be a curableinsulation material. Instead of using a curable ins ulationmaterial,otherinsulation materiallike hardening material,for instance thermoplastic or thermoset material ca n be used.According to a further embodiment of the module, th einsulation material in the joint region comprises a fluid,viscous or gaseous material. A fluid material can b e oil. Aviscous material can be gel. A gaseous material can be aninsulating gas,which can be SF6 ordifferentfrom SF6. According to a furtherembodimentofthe module,a numberofthe connecting structures is equal to a number of t he firstfoils and / or to a number of the second foils. The f irst foilsof the first module part and the second foils of th e secondmodule part can be pairwise connected to each other via theconnecting structures. It is possible that the join t regioncomprisesconductive ring-like structuresarranged betweenthe connecting structures and the foils. Such a con ductivering-like structure can be in direct mechanical andelectrical contact with one of the foils and one of theconnecting structures. According to a furtherembodimentofthe module,a numberof the connecting structuresissmallerthan a number ofthefirst foils and / or smaller than a number of the sec ond foils.It is possible that some but not all of the first f oils ofthe first module part and some but not all of the s econd P2024,0870 WO N / P240004WO01 September11,2025 -11 -foils of the second module part are pairwise connec ted toeach other via the connecting structures or via theconnecting structuresand the conductive ring-like structures.For instance, only some first foils are joined with somesecond foils, while the mechanical and electrical c onnectioncan be skipped for some pairs of the first and seco nd foils.A ration of the number of the connecting structures to thenumber of the first foils or to the number of the s econdfoils may be from 0.1 to 0.9, from 0.2 to 0.8, from 0.3 to0.7 orfrom 0.4 to 0.6.According to a further embodiment of the module, th e moduleis an electric bushing, for instance high voltage w allbushing, for instance a high voltage direct current , HVDC,bushing, or any other type of bushing, e.g. transfo rmerbushing. The module can also be a cable termination or aninstrument transformer. The first module part and t he secondmodule part can be a first condenser core and a sec ondcondensercore,respectively.According to a further embodiment of the module, th e firstisolating structures and / or the second isolating st ructuresare resin impregnated paper, RIP, layers. Instead o f RIP,other materials like RIS (resin impregnated synthet ic), RIN(resin impregnated non-woven), OIP (oil impregnated paper),glass, thermoplastic, GIF (gas impregnated film), o il, or gasimpregnated materialcan be used.According to one embodiment of a method for produci ng amodule,the method comprisesa step ofproviding a firstmodule part comprising a first electrical conductor , first P2024,0870 WO N / P240004WO01 September11,2025 -12 -foils and first isolating structures alternated wit h thefirst foils. The method further comprises a step of providinga second module part comprising a second electricalconductor, second foils and second isolating struct uresalternated with the second foils. A joint region is formedforjoining togetherthe firstmodule partand the secondmodule part, wherein the joint region comprises con nectingstructuresand an insulation material.The forming the jointregion comprises: electrically connecting the firstelectrical conductor to the second electrical condu ctor;applying the connecting structures, wherein each on e of theconnecting structureselectricallyconnectsone of firstfoils to one of the second foils; and filling the j ointregion with the insulation material for electricall yisolating the connecting structures from each other . Theinsulation material can be used for electrically is olating atleastthe connecting structuresfrom the firstand second electricalconductors.The insulation materialcan also beused for electrically isolating some or all differe ntconductive parts in the joint region from each othe r asmentioned above.When forming the joint region, it is possible to ad d anevacuation step, for instance before the step of fi lling thejoint region with the insulation material. The insu lationmaterial may be a gaseous or fluid material. Subseq uently, astep ofcuring / hardening the fluid materialmaybe performed forobtaining the insulation materialin form ofa solid material.According to one embodiment of a method for produci ng amodule, the method comprises providing a first modu le partcomprising a first electrical conductor, first foil s and P2024,0870 WO N / P240004WO01 September11,2025 -13 -first isolating structures alternated with the firs t foils.The method further comprises providing a second mod ule partcomprising a second electrical conductor, second fo ils andsecond isolating structures alternated with the sec ond foils.Moreover, the method comprises a process of forming a jointregion for joining together the first module part a nd thesecond module part, wherein the joint region compri ses aconductor connector, connecting structures and an i nsulationmaterial. The process of forming the joint region c ompriseselectricallyand mechanicallyconnecting the first electricalconductor to the second electrical conductor via th econductor connector. This process further comprises applyingorforming the connecting structures,wherein each one ofthe connecting structureselectricallyconnectsone of first foilsto one ofthe second foils.The jointregion isfilledwith the insulation material for electrically isola ting atleast the conductor connector and the connecting st ructuresfrom each other. The insulation materialcan also be usedfor electrically isolating some or all different co nductiveparts in the joint region from each other as mentio ned above.According to further embodiments of the method, the moduleaccording to any embodiments described in this disc losure isproduced.The present disclosure comprises several aspects of a moduleand severalaspectsofa method forproducing such a moduleon the basis of their embodiments and examples. Eve ry featuredescribed with respect to one of the aspects is als odisclosed herein with respectto the otheraspect, even if the respective feature isnotexplicitlymentioned in thecontext of the specific aspect. For example, the me thoddescribed in this disclosure is directed to a metho d for P2024,0870 WO N / P240004WO01 September11,2025 -14 - producing the module described in thisdisclosure. Thus,features and advantages described in connection wit h themodule can be used forthe method,and vice versa.While the disclosure is amenable to various modific ations andalternative forms, specifics thereof are shown by w ay ofexample in the figures and will be described in det ail. Itshould be understood, however, that the intention i s not tolimit the disclosure to the particular described em bodimentsand examples.On the contrary,the intention isto coverallmodifications, equivalents, and alternatives fallin g withinthe scope of the disclosure defined by the appended claims.The accompanying figuresare included to provide a furtherunderstanding. In the figures, elements of the same structureand / or functionality may be assigned to the same re ferencesigns. It is to be understood that the examples sho wn in thefigures are illustrative representations and are no tnecessarilytrue to scale.Figure 1A schematically shows one general concept o f a moduleaccording to an example ofthe disclosure,wherein a firstmodule part is connected to a second module part vi a a jointregion. Figures1B basicallyshowsthe module according to the example shown in Figure 1A in sectionalview.Figures 2A, 2B, 3A, 3B, 4A and 4B show further exam ples ofthe module.Figures 5A, 5B, 5C and 5D show some exemplary metho d steps ofa method for producing a module having a joint regi on. P2024,0870 WO N / P240004WO01 September11,2025 -15 -Figures 6 and 7 show further examples of the module insectionalviews.Figure 8A schematically shows a further general con cept of amodule according to another example of the disclosu re,wherein the first electrical conductor and the seco ndelectrical conductor are directly connected to each othereven withoutthe use ofa conductorconnector. Figures8B basicallyshowsthe module according to the example shown in Figure 8A in sectionalview. Figures9A,9B and 9C show furtherexamplesofthe module. Figure 1A showsone generalconceptofa module 10 accordingto one exemplary embodiment. A sectional view of su ch amodule 10 isshow in Figure 1B.The module 10 comprises a first module part 1, a se condmodule part 2 and a joint region 3. Regarding the f irstmodule part 1 and the second module part 2, only re gionsadjoining the joint region 3 are shown. The first m odule part1 and the second module part 2 can extend further t o the leftand to the right, respectively. The first module pa rt 1 andthe second module part 2 may have similar or identi calgeometricalsizes.The firstmodule part1 and the secondmodule part 2 may have a lateral extension of sever al meters.It is possible that the module 10 has a symmetrical geometry.The first module part 1 comprises a first electrica lconductor 11, for instance a single first electrica lconductor 11, a plurality of first foils 12 and a p lurality P2024,0870 WO N / P240004WO01 September11,2025 -16 -first isolating structures 13. The first foils 12 a nd thefirst isolating structures 13 are arranged in an al ternatedmanner. Thus, besides one innermost first isolating structure13 and one outermostfirstisolating structure 13, anyfurther first isolating structure 13 may be arrange d betweentwo adjacent first foils 12. Moreover, any first fo il 12 maybe arranged between two adjacent first isolating st ructures13. The first isolating structures 13 and the first foils 12are wrapped around the first electrical conductor 1 1 in analternated manner.The first electrical conductor 11 can be electrical lyisolated from an innermost first foil 12A by an inn ermostfirst isolating structure 13A. For instance, the fi rstelectrical conductor 11 is completely surrounded by the firstfoils 12 and the first isolating structures 13. Onl y in thejoint region 3, the first electrical conductor 11 p artiallyprotrudesoverthe firstfoils12 and / orthe first isolatingstructures 13 for instance along a lateral directio n. It ispossible that none of the first foils 12 is in elec tricalcontact with the first electrical conductor 11 or w ith anyotherone ofthe firstfoils12.The second module part 2 comprises a second electri calconductor 21, for instance a single second electric alconductor21,a pluralityofsecond foils22 and a pluralitysecond isolating structures 23. The second foils 22 and thesecond isolating structures 23 are arranged in an a lternatedmanner. Thus, besides one innermost second isolatin gstructure 23 and one outermost second isolating str ucture 23,any further second isolating structure 23 may be ar rangedbetween two adjacent second foils 22. Moreover, any secondfoil 22 may be arranged between two adjacent second isolating P2024,0870 WO N / P240004WO01 September11,2025 -17 -structures 23. The second isolating structures 23 a nd thesecond foils 22 are wrapped around the second elect ricalconductor21 in an alternated manner.The second electrical conductor 21 can be electrica llyisolated from an innermost second foil 22A by an in nermostsecond isolating structure 23A. For instance, the s econdelectrical conductor 21 is completely surrounded by thesecond foils 22 and the second isolating structures 23. Onlyin the joint region 3, the second electrical conduc tor 21partially protrudes over the second foils 22 and / or thesecond isolating structures 23 for instance along a lateraldirection. It is possible that none of the second f oils 22 isin electrical contact with the second electrical co nductor 21orwith anyotherone ofthe second foils22.In Figure 1B, as an example, three first foils 12A, 12B, 12C,fourfirstisolating structures13A,13B,13C,13D aswellasthree second foils 22A, 22B, 22C and four second is olatingstructures23A,23B,23C,23D are shown.The first modulepart 1 and / or the second module part 2 can have ano thernumber of the first foils 12, the first isolating s tructures13, the second foils 22 and / or the second isolatingstructures23.Such a numbercan be from 3 to 150, 3 to 100,3 to 50, 3 to 30, 3 to 20, 3 to 10 or from 5 to 150 , 5 to100,5 to 50,5 to 30,5 to 20,5 to 10 orfrom 10 to 20. The firstmodule part1 and the second module part 2 arejoined together in the joint region 3. The joint re gion 3comprises a conductor connector 31, wherein the con ductorconnector 31 mechanically and electrically connects the firstelectrical conductor 11 to the second electrical co nductor21.The conductorconnector31A isformed from an P2024,0870 WO N / P240004WO01 September11,2025 -18 -electrically conductive material. A connection betw een theconductor connector 31 and the electrical conductor 11 and / orbetween the conductor connector 31 and the second e lectricalconductor 21 can be formed by e.g. brazing, welding , frictionwelding, stir welding or different contact like scr ewcontacts or spring loaded contacts, or gluing using aconductive glue. Itispossible thatthe conductorconnector31 has the formof a tube. The first electrical conductor 11 and / or thesecond electrical conductor 21 can be located parti allyinside the conductor connector 31. It is also possi ble thatthe first electrical conductor 11 is a first conduc tor tube11 and / or that the second electrical conductor 21 i s a secondconductor tube 21. In this case, the conductor conn ector 31can be arranged partially within the first conducto r tube 11and / or partially within the second conductor tube 2 1 as shownin Figure 1B. The conductor connector 31 can be arr angedpartially outside the first conductor tube 11 and t he secondconductor tube 21. It is also possible for the firs tconductortube 11 and the second conductortube 21 to bearranged partially inside the conductor connector 3 1 being atube. Along a lateraldirection,the conductorconnector 31 canhave a constant diameter. It is also possible for t heconductor connector 31 to have a varying inner or o uterdiameter. A conductor connector 31 with varying siz es along alateral direction can simplify the realization of a stablemechanical and electrical connection between the co nductorconnector31 and the firstelectricalconductor11 aswellasbetween the conductor connector 31 and the second e lectricalconductor21. P2024,0870 WO N / P240004WO01 September11,2025 -19 -For example, at its both ends, the conductor connec tor 31 hassmaller size than inner diameters of the first elec tricalconductor 11 and the second electrical conductor 21 . In themiddle between both ends of the conductor connector 31,however, the conductor connector 31 can have larger size thanthe inner diameters of the first electrical conduct or 11 andthe second electricalconductor21.As an alternative, outer surface of the conductor c onnector31 can have the form of a hyperboloid. In this case , at bothends, the conductor connector 31 being a tube can h ave aninner diameter which is larger than outer diameters of thefirst electrical conductor 11 and of the second ele ctricalconductor 21. In the middle, however, the conductor connector31 can have an inner diameter which is smaller than the outerdiametersofthe firstelectricalconductor11 and ofthesecond electrical conductor 21. Thus, the first ele ctricalconductor 11 and of the second electrical conductor 21 can belocated partially within the conductor connector 31 .As shown in Figures 1A and 1B, the joint region 3 c ancomprise atleasttwo ora pluralityofconnecting structures 32.The connecting structure 32 isformed from anelectrically conductive material. The connecting st ructure 32can be an electrically conductive net which is roll ed up toform an emptycylinder.Each one ofthe connecting structures32 can electrically connect one of first foils 12 t o one ofthe second foils 22. As shown in Figure 1B, the con nectingstructure 32A electricallyconnectsone firstfoil 12A to onesecond foil 22A, wherein the connecting structure 3 2Celectrically connects one first foil 12C to one sec ond foil22C. For example, the connecting structure 32 is in direct P2024,0870 WO N / P240004WO01 September11,2025 -20 -mechanical and electrical contact with one first fo il 12 andone corresponding second foil 22. As indicated in F igures 1Aand 1B, each of the first foils 12, the second foil s 22, thefirstisolating structures13 and / orofthe second isolating structures23 can have the form ofa tube.The joint region 3 is filled with an insulation mat erial 33forelectricallyisolating the conductorconnector 31 and theconnecting structures 32 from each other. The insul ationmaterial33 can be made up ofa solid material.In thiscase,the joint region 3 can be free of a gaseous, viscou s and / orfluid material. It is, however, possible that the i nsulationmaterial 33 in the joint region 3 comprises a fluid , viscousorgaseousmaterial. Asshown in Figure 1B,itispossible thata first foil12B isneithermechanicallynorelectricallyconnected to a corresponding second foil22B.A verticaldistance d2 between two adjacentconnecting structures32A and 32C can be largerthan a vertical distance d1 between two adjacent fi rst foils12A and 12B, between two adjacent first foils 12B a nd 12C,between two adjacent second foils 22A and 22B or be tween twoadjacentsecond foils22B and 22C.Thus, Figures 1A and 1B show an example of a module 10,wherein a number of the connecting structures 32 is smallerthan a numberofthe firstfoils12 and / orsmaller than anumber of the second foils 22. In this case, some b ut not allof the first foils 12 of the first module part 1 an d some butnot all of the second foils 22 of the second module part 2are pairwise connected to each other via the connec tingstructures32. P2024,0870 WO N / P240004WO01 September11,2025 -21 -The module 10 shown in Figures 2A and 2B is basical lyidenticalto the module 10 shown in Figures1A and 1B.Indeviation from Figures 1A and 1B, the module 10 sho wn inFigures 2A and 2B comprises a number of the connect ingstructures 32 which is equal to a number of the fir st foils12 and / or to a number of the second foils 22. In th is case,all first foils 12 of the first module part 1 can b e pairwiseconnected to all second foils 22 of the second modu le part 2via the connecting structures 32. Thus, compared to Figure1B,asshown in Figure 2B,the jointregion 3 also comprises a connecting structure 32B which mechanicallyandelectrically connects the first foil 12B to the cor respondingsecond foil 22B. In this case, within the productio ntolerances, the vertical distance d2 between two ad jacentconnecting structures 32 can be equal to the vertic aldistance d1 between two adjacent the first foils 12 orbetween two adjacentthe second foils22.In any cases, within the production tolerances, wal ls of thefirstfoils12 and / orwallsofthe second foils22 can haveequal vertical thicknesses. It is possible that wal ls of theconnecting structures 32 have equal vertical thickn esses.Furthermore, within the production tolerances, wall s of thefirst isolating structures 13 and / or walls of the s econdisolating structures 23 can have equal vertical thi cknesses.The module 10 shown in Figures 3A and 3B is basical lyidenticalto the module 10 shown in Figures1A and 1B.Indeviation from Figures 1A and 1B, in the joint regi on 3, themodule 10 shown in Figures 3A and 3B comprises a pl urality ofconductive ring-like structures 4, 4A1, 4A2, 4C1 an d 4C2. Theconductive ring-like structure 4 is arranged betwee n oneconnecting structure 32 and one first foil 12 or be tween one P2024,0870 WO N / P240004WO01 September11,2025 -22 -connecting structure 32 and one second foil 22. For example,the conductive ring-like structure 4 is in direct m echanicaland electrical contact with one connecting structur e 32 andone firstfoil12 orone second foil22.As shown in Figure 3B, each one of the conductive r ing-likestructures4 isarranged on one ofthe firstfoils 12 oronone of the second foils 22. The conductive ring-lik estructure 4 can surround one first foil 12 or one s econd foil22. One connecting structure 32 can surround one pa ir of theconductive ring-like structures 4. Each of the conn ectingstructures32 can be electricallyconnected to one firstfoil12 and one second foil 22 via one pair of the condu ctivering-like structures 4, for example via the ring-li kestructures 4A1 and 4A2 or via the ring-like structu res 4C1and 4C2. Here, each one of the connecting structure s 4 can bemechanically and electrically connected to two diff erentconductive ring-like structures 4, wherein one of t he ring-like structures4 iselectricallyconnected to one firstfoil12 and another one of the ring-like structures 4 iselectricallyconnected to one second foil22.As shown in Figures 3A and 3B, the conductive ring- likestructures 4 on the same vertical level of the foil s 12 and22 may have the same size, diameter and / or the samethickness. The conductive ring-like structures 4 on differentvertical levels of the foils 12 and 22 may have the differentsizes,diametersand / ordifferentthicknesses. Itispossible thatsome ofthe firstfoils12 and some ofthe second foils 22 are not mechanically or electri callyconnected to any of the conductive ring-like struct ures 4. InFigure 3B, the first foil 12B is not connected to t he second P2024,0870 WO N / P240004WO01 September11,2025 -23 -foil 22B, wherein the first foil 12B and the second foil 22Bare not connected to any conductive ring-like struc ture 4.The module 10 shown in Figures 4A and 4B is basical lyidenticalto the module 10 shown in Figures3A and 3B.Indeviation from Figures 3A and 3B, it is possible th at allfirst foils 12 and all second foils 22 in the joint region 3are connected to the conductive ring-like structure s 4 andthe connecting structures 32. In Figure 4B, also th e firstfoil 12B is electrically connected to the second fo il 22B viathe conductive ring-like structures 4B1, 4B2 and th econnecting structure 32B.Thus,up to the presence oftheconductive ring-like structures 4 between the conne ctingstructures 32 and the first foils 12 or second foil s 22, themodule 10 shown in Figures 4A and 4B is identical t o themodule 10 shown in Figures2A and 2B. Asshown in Figures3B and 4B,a verticaldistance d2 betweentwo adjacent connecting structures 32 can be larger than avertical distance d1 between two adjacent first foi ls 12 orbetween two adjacent second foils 22. This is due t odifferent thicknesses of different conductive ring- likestructures 4 on different vertical levels or due to theabsence ofsome conductive ring-like structures4.As shown in Figures 1A to 4B and also in Figures 5A to 7 and9, within the joint region 3, the first foils 12 an d thefirst isolating structures 13 can form a staircase- likegeometrical structure, for instance a circumferenti alstaircase-like geometrical structure. Such geometri calstructure has lateral steps and vertical step faces , whereinthe lateral steps are formed by surfaces of the fir st foils12 and the vertical step faces are formed by surfac es of the P2024,0870 WO N / P240004WO01 September11,2025 -24 -first isolating structures 13. Also within the join t region3, the second foils 22 and the second isolating str uctures 23can form a staircase-like geometrical structure, fo r instancea circumferential staircase-like geometrical struct ure,having lateral steps and vertical step faces, where in thelateralstepsare formed bysurfacesofthe second foils22 and the verticalstep facesare formed bysurfaces ofthe second isolating structures23.In virtue of such staircase-like geometrical struct ure / s, theconductive ring-like structures 4 and / or the connec tingstructures 32 can be arranged on and fixed to the l ateralsteps in a secure and simplified manner. The vertic al stepfacescan be formed byinclined orcurved vertical surfaces ofthe firstisolating structures13 and / orofthe secondisolating structures 23. Hence along a vertical dir ectionfrom the conductor connector 31 towards outer conne ctingstructures 32, the joint region 3 has surfaces havi ng theform of a terrace-like hyperboloid. In sectional vi ew, thejoint region 3 can have a V-like or parabola-like g eometry.This simplifies the process of filling the joint re gion 3with the insulation material33.Figures 5A, 5B, 5C and 5D show some method steps of a methodforproducing a module 10 having a jointregion 3.According to Figure 5A, a first module part 1 and a secondmodule part 2 are provided. The first module part 1 and thesecond module part 2 are joined together at the joi nt region3 using the conductor connector 31 and the connecti ngstructures32.Itisalso possible to additionally use the conductive ring-like structures4. P2024,0870 WO N / P240004WO01 September11,2025 -25 - The firstmodule part1 and the second module part 2 can betwo separate resin impregnated paper, RIP, condense r coreswhich are manufactured with one side specially desi gned forjoining purposes. Instead of RIP, other materials l ike RIS(resin impregnated synthetic), RIN (resin impregnat ed non-woven), OIP (oil impregnated paper), glass, thermop lastic,GIF (gas impregnated film), oil, or gas impregnated materialcan be used.According to Figure 5B, the first electrical conduc tor 11 iselectrically and mechanically connected to the seco ndelectrical conductor 21 via the conductor connector 31. Thefirst electrical conductor 11, the second electrica lconductor21 and / orthe conductorconnector31 can have theform of a tube. The conductor connector 31 can be l ocatedpartially inside and partially outside the first el ectricalconductor 11 and the second electrical conductor 21 , or viceversa. The mechanical connection can be carried out by abrazing, welding, friction welding, stir welding pr ocess orbydifferenttypesofcontactslike screw contacts orspringloaded contacts, or by gluing using a conductive gl ue. It ispossible to add isolating spacer / s 5 in the joint r egion 3around the conductor connector 31, the first electr icalconductor 11 and / or the second electrical conductor 21. Suchan isolating spacer5 or50 isshown schematically in Figure 7.According to Figure 5C, conductive ring-like struct ures 4 canbe fastened at the foil edges. The thicknesses of t he ring-like structures 4 may help to lower the field in th e jointregion 3. P2024,0870 WO N / P240004WO01 September11,2025 -26 -As shown in Figure 5D, the conductive connecting st ructures32 or nets forming the conductive connecting struct ures 32are fastened between the conductive rings 4 or ring -likestructures 4 to pairwise connect the first foils 12 and thesecond foils 22 of the module parts 1 and 2, for in stance ofthe two resin impregnated paper, RIP, bodies. In th e absenceof the conductive ring-like structures 4, the condu ctiveconnecting structures 32 may be fastened to the foi l edgesdirectly. Depending on different designs, all foils 12 and 22or only some of the foils 12 and 22 are mechanicall y andelectricallyconnected.It is desirable that the conductive connecting stru ctures 32or the nets are formed to be sufficiently mechanica lly stableto keep their cylindrical shape during possible eva cuationand subsequent filling with the insulation material 33. Theinsulation material33 maybe in liquid orviscous form andcan be cured subsequently. It is possible to add is olatingspacer / s 5 into the joint region 3 around the condu ctiveconnecting structures32 orbetween the conductive connecting structures32.Such isolating spacers5,51 and 52 are shown schematicallyin Figure 7.As shown in Figure 5D, the joint region 3 is filled with theinsulation material33.The insulation material33 maybe acurable liquid insulating material like e.g. epoxy, gel, orliquid rubber. Prior to filling, an evacuation proc ess may becarried out. Moreover, surfaces of the isolating st ructures13 and 23, for instance, resin impregnated paper, R IPsurfaces, may be activated. For preventing possible shrinkageduring curing, a heat expanding filler might be add ed to theinsulation material33. P2024,0870 WO N / P240004WO01 September11,2025 -27 -It is possible to mount common flange / s on the firs t modulepart 1 and / or on the second module part 2, for inst ance onthe RIP condensercores,to coverthe jointregion 3 andprovide mechanical support. For instance, flanges a rearranged on both sides of the joint region 3 so tha t it canbe avoided that the joint region 3 being a connecti ng zone isexposed to high mechanical stresses. Thus, it is no tnecessary for the joint region 3 to take the comple temechanical strength, and the module parts 1 and 2 c an beconnected firmlybya flange connection.In case that the insulation material 33 in the join t region 3is made up of a solid material, for instance of a c urableinsulating material, the joint region 3 is a dry an d gas-freejoint region 3. For instance, the joint region 3 is free of aSF6 gas.Using gas-free solutionscan avoid issues with gas monitoring.The dry and gas-free solution can help in the devel opment ofdesigning more effective high voltage modules,for example,dry and gas-free high voltage wall bushings which c an bebased on resin impregnated paper,RIP,technology. Thesemodules or bushings can comprise a RIP condenser co re insidea fiber-reinforced epoxy insulator tube with silico ne shedson its outside. The space between the condenser cor e andinsulatortube can be filled with gel.A length of the RIP condensercore can be severalmetersto enable the high voltage level.This disclosure provides a module 10 which is forme d from twomodule parts 1 and 2 joined together in a joint reg ion 3.Thus, it is suggested to form the module 10, for in stance thecondenser core, from two separate module parts 1 an d 2, forinstance from two shorter RIP bodies, that are join ed P2024,0870 WO N / P240004WO01 September11,2025 -28 -together to achieve the desired total length. One m ainchallenge with such solution is the dielectric stre ngth ofthe joint region 3 between the module parts 1 and 2 or RIPbodies. This challenge may be solved for instance b y using adry and gas-free solution for the joint region 3. I nparticular, for a more environmentally friendly sol ution, thejointregion 3 can be free ofSF6 gas.Here, the module 10 can be a high voltage module, f orinstance an electric high voltage wall bushing. The firstmodule part 1 and the second module part 2 can be a firstcondenser core and a second condenser core, respect ively.Thus, such a module 10 can be a high voltage wall b ushing,for instance a high voltage direct current, HVDC, w allbushing, which can be based on two separate RIP con densercores that are joined together. The foils 12 and 22 of thetwo condenser cores can be pairwise electrically co nnected.The insulation of the joint region 3 can be made up of aninsulation material 33, for instance of a solid mat erialresulting in a both dry, for instance no oil, and g as-freedesign. As alternatives, however, it is also possib le for theinsulation material 33 in the joint region 3 to com prise afluid,viscousorgaseousinsulation material. Figure 6 showsa crosssection ofthe module 10 at the jointregion 3. Such a module 10 can be produced by a met hoddescribed in Figures5A to 5D.Due to the presence oftheconductive ring-like structures 4 with different th icknessesat different vertical levels, the distance d2 betwe enadjacent connecting structures 32 in joint region 3 is largerthan the distance d1 between adjacent foils 12 or 2 2 in thefirst module part 1 and in the second module part 2 , forinstance in the RIP bodies. P2024,0870 WO N / P240004WO01 September11,2025 -29 -The module 10 shown in Figure 6 is basically identi cal to themodule 10 shown in Figure 4B. In deviation from Fig ure 4B,the module 10 shown in Figure 6 does not comprise t he outerconductive ring-like structures 4C1 and 4C2 and the outerconnecting structure 32C.The module 10 shown in Figure 7 is basically identi cal to themodule 10 shown in Figure 6. In deviation from Figu re 6,however,the jointregion 3 comprisesatleastone isolatingspacer 5 or 50 arranged between one connecting stru cture 32and the conductorconnector31.Such spacer / s5 or 50 can bearranged on the first electrical conductor 11 and / o r on thesecond electricalconductor21.The jointregion 3 further comprisesadditionalspacers5,51 and 52 arranged betweentwo adjacent connecting structures 32. It is possib le thatthe material of the spacer / s 5 differs from the ins ulationmaterial 33. The spacers 5 are used to keep the suf ficientdistances from one tube to another tube and thus co ntributeto the mechanical stability of the joint region 3 a nd thus ofthe module 10.As shown in Figure 7, the isolating spacer 5, 50, 5 1 or 52only fills part of a lateral width of the joint reg ion 3. Inaddition to or in deviation from Figure 7, it is po ssiblethatthe isolating spacer5,50,51 or52 fillsat least20%, 30 %, 50 %, 70 %, 80 % of the lateral width of t he jointregion 3 or even the full lateral width of the join t region3. For RIP, the isolating spacer 5, 50, 51 or 52 ca n be madeofpaper,e.g.severalpaperlayerson top ofeach other.The examples of a module 10 shown in Figures 8A and 8B arebasically identical to the example of the module 10 shown in P2024,0870 WO N / P240004WO01 September11,2025 -30 -Figures 1A and 1B. In deviation from Figures 1A and 1B, it ispossible for the first electrical conductor 11 to b e indirect mechanical and thus in direct electrical con tact withthe second electrical conductor 21. Thus, for formi ng thejointregion 3,itisalso possible notto use the conductorconnector 31. Thus, the examples described in Figur es 1A to 7can be void of such a conductor connector 31. A dir ectconnection between the first electrical conductor 1 1 and thesecond electrical conductor 21 can be formed by e.g . brazing,welding, friction welding, stir welding or differen t contactlike screw contacts or spring loaded contacts or by gluingusing a conductive glue.Thus,itisalso possible thatthefirst and second electrical conductors 11 and 21 ar e bepressed againsteach other. The firstconductorand / orthe second conductorto have tube-like structure / s, wherein the first conductor 11 ma y belocated in places inside the second conductor 21, o r viceversa. The first conductor 11 and / or the second con ductor 21may have different or varying inner or outer diamet ers sothat one conductor can be pressed against the other conductorto form a stable mechanical and / or electrical conne ction. Thelatter is shown for instance in Figures 9A and 9B d escribinga module 10 which is basically identical to the mod ule 10shown in Figure 8B.In deviation from Figure 8B, according to Figure 9A , thefirstconductor11 islocated in placesinside the secondconductor 21. In particular, in places at the joint region 3,the firstconductor11 hasa smallerdiameterthan a diameterof the second conductor 21. Thus, at the joint regi on 3, partof the first conductor 11 is located inside the sec ondconductor 21. For example, in places at the joint r egion 3, P2024,0870 WO N / P240004WO01 September11,2025 -31 -an outer diameter of the first conductor 11 is smal ler thanor equal to an inner diameter of the second conduct or 21.In deviation from Figure 8B, according to Figure 9B , thesecond conductor 21 is located in places inside the firstconductor 11. In particular, in places at the joint region 3,the second conductor 21 can have a smaller diameter than adiameter of the first conductor 11. Thus, at the jo int region3, part of the second conductor 21 is located insid e thefirst conductor 11. For example, in places at the j ointregion 3, an outer diameter of the second conductor 21 issmaller than or equal to an inner diameter of the f irstconductor11.As further deviation from Figure 8B, according to F igure 9B,a first cork layer 61 can be arranged between the f irstconductor 11 and the first isolating structure 13A. It isalso possible to arrange a second cork layer 62 bet ween thesecond conductor 21 and the second isolating struct ure 23A.The corklayerbetween the conductor11 / 21 and the firstisolating structure 13A / 23A has the purpose to abso rbmechanical stresses between the conductor 11 / 21 and all theisolating structures 13A / 23A, 13B / 23B,… including t heinsulation material 33. For instance, the cork laye r / s 61 / 62is / are configured to absorb mechanical stresses for instancewhen the insulation material 33 is deformed, for in stanceshrinks, during a curing process or during operatio n of themodule 10. Such cork layer / s 61 / 62 can be also pres ent in anyofthe examplesofthe module described in Figures 1 to 9A.For example, the cork layer / s 61 / 62 is / are configur ed tocompensate different thermal expansions of the cond uctor / s11 / 21 and of the insulation material 33 (e.g. epoxy ) and / or P2024,0870 WO N / P240004WO01 September11,2025 -32 -of the isolating structures, for instance of all th eisolating structures 13A / 23A, 13B / 23B,…. It is poss ible thatthe cork layer / s 61 / 62 is / are placed solely at inte rfaces ofthe conductor / s 11 / 21, the isolating structures 13A / 23Aand / or of the insulation material 33. The cork laye r / s 61 / 62can be formed already in the manufacturing of the s eparatemodule parts1 and 2.It is also possible, however, to place further cork layer / s63 on surfaces of the conductor / s 11 / 21 and / or of t heconductorconnector31 in jointregion 3. Thisis shown forinstance in Figure 9C. Here, a further cork layer 6 3 islocated in the joint region 3, for instance, only i n thejoint region 3. The further cork layer 63 can adjoi n the corklayer 61 and / or the cork layer 62. The further cork layer 63is located for instance between the insulation mate rial 33and the conductor / s 11 / 21. The further cork layer 6 3 can bein directcontactwith the insulation material33, theconductor / s 11 / 21 and / or the cork layer 61 / 62. It i s alsopossible that only the further cork layer 63 in the jointregion 3 ispresent,i.e.also in the case without the cork layer61 and / orthe corklayer62.Such corklayer 61,62and / or 63 can be present in any of Figures 1A to 9A .Furthermore,in allFigures,additionalmechanical stabilityfor the module 10, in particular in the joint regio n 3, canbe provided by using flange connection / s between th e twomodule parts1 and 2.Forexample,common flange / s maybeused to cover the joint region 3. The flanges can b e arrangedon both sidesofthe jointregion 3 so thatitcan be avoidedthat the joint region 3 is exposed to high mechanic alstresses. P2024,0870 WO N / P240004WO01 September11,2025 -33 -The embodiments shown in the Figures as stated repr esentexemplaryembodimentsofa module and a method for producing such a module;therefore,theydo notconstitute a completelist of all embodiments according to the improved a rrangementof the module and the method. Actual arrangements o f themodule and of the method may vary from the exemplar yembodimentsdescribed above.This application claims the priority of the Europea n patentapplication EP 24203230.8, the disclosure content o f which isherebyincluded byreference.

[0002] P2024,0870 WO N / P240004WO01 September11,2025 -34 - Reference Signs 10 module 1 firstmodule part 11 firstelectricalconductor 12 firstfoil 12A firstfoil 12B firstfoil 12C firstfoil 13 firstisolating structure 13A firstisolating structure 13B firstisolating structure 13C firstisolating structure 13D firstisolating structure 2 second module part 21 second electricalconductor 22 second foil 22A second foil 22B second foil 22C second foil 23 second isolating structure 23A second isolating structure 23B second isolating structure 23C second isolating structure 23D second isolating structure 3 jointregion P2024,0870 WO N / P240004WO01 September11,2025 -35 - 31 conductorconnector 32 connecting structure 32A connecting structure 32B connecting structure 32C connecting structure 33 insulation material 4 conductive ring-like structure 4A1 conductive ring-like structure 4A2 conductive ring-like structure 4B1 conductive ring-like structure 4B2 conductive ring-like structure 4C1 conductive ring-like structure 4C2 conductive ring-like structure 5 isolating spacer 50 isolating spacer 51 isolating spacer 52 isolating spacer 61 firstcorklayer 62 second corklayer 63 corklayer / furthercorklayerd1 distance between two adjacent first / second foilsd2 distance between two adjacent connecting structu res

Claims

1. P2024,0870 WO N / P240004WO01 September11,2025 -36 - Claims 1.A module (10)comprising:− a first module part (1) comprising a first electric alconductor (11), first foils (12) and first isolatin gstructures (13) alternated with the first foils (12 );− a second module part (2) comprising a second electr icalconductor (21), second foils (22) and second isolat ingstructures (23) alternated with the second foils (2 2); and− a joint region (3) comprising connecting structures (32)and an insulation material(33), wherein− the first module part (1) and the second module par t (2)are joined together in the joint region (3), the fi rstelectrical conductor (11) being electrically connec ted tothe second electricalconductor(21),− each one of the connecting structures (32) electric allyconnects one of first foils (12) to one of the seco ndfoils(12),and − the jointregion (3)isfilled with the insulation material (33) for electrically isolating at least t heconnecting structures(32)from each other. 2.The module (10)according to claim 1,wherein− the joint region (3) further comprises conductive r ing-like structures(4),− each one of the conductive ring-like structures (4) isarranged on one of the first foils (12) or on one o f thesecond foils(22),and− the connecting structures (32) are electrically con nectedto the firstfoils(12)and / orto the second foils (12) via the conductive ring-like structures (4), each o ne of P2024,0870 WO N / P240004WO01 September11,2025 -37 - the connecting structures (4) being electrically co nnectedto two different conductive ring-like structures (3 2).

3. The module (10) according to claim 1, wherein th e jointregion (3)furthercomprisesa conductorconnector (31),andwherein the first electrical conductor (11) is elec tricallyconnected to the second electrical conductor (21) v ia theconductorconnector(31). 4.The module (10)according to claim 3,wherein− the first electrical conductor (11) is a first cond uctortube (11),− the second electrical conductor (21) is a second co nductortube (21),and − the conductorconnector(31)isarranged partially within the firstconductortube (11)and partiallywithin the second conductortube (21),orvice versa.

5. The module (10) according to any the previous cl aims,wherein the first electrical conductor (11) is in d irectmechanical and thus in direct electrical contact wi th thesecond electricalconductor(21).

6. The module (10) according to one of the previous claims,wherein− within the joint region (3), the first foils (12) a nd thefirst isolating structures (13) form a staircase-li kegeometrical structure having lateral steps and vert icalstep faces, the lateral steps being formed by surfa ces ofthe first foils (12) and the vertical step faces be ingformed by surfaces of the first isolating structure s (13),and / or P2024,0870 WO N / P240004WO01 September11,2025 -38 - − within the jointregion (3),the second foils(22) and the second isolating structures (23) form a staircase-l ikegeometrical structure having lateral steps and vert icalstep faces, the lateral steps being formed by surfa ces ofthe second foils (22) and the vertical step faces b eingformed by surfaces of the second isolating structur es(23).

7. The module (10) according to the previous claim,wherein the vertical step faces are formed by incli ned orcurved vertical surfaces of the first isolating str uctures(13) and / or of the second isolating structures (23) .

8. The module (10) according to one of the previous claims,the joint region (3) further comprising at least on eisolating spacer(5),wherein− the at least one isolating spacer (5) is arranged b etweentwo adjacentconnecting structures(32)orbetween one connecting structure (32) and the conductor connect or (31)or between one connecting structure (32) and one of thefirst and second electrical conductors (11, 21), an d− material of the at least one spacer (5) differs fro m theinsulation material(33).

9. The module (10) according to one of the previous claims,wherein the insulation material (33) in the joint r egion (3)ismade up ofa solid material.

10. The module (10) according to one of claims 1 to 8,wherein the insulation material (33) in the joint r egion (3)comprisesa fluid,viscousorgaseousmaterial. P2024,0870 WO N / P240004WO01 September11,2025 -39 -11. The module (10) according to one of the previou s claims,wherein− a number of the connecting structures (32) is equal to anumber of the first foils (12) and / or to a number o f thesecond foils(22),and− the first foils (12) of the first module part (1) a nd thesecond foils (22) of the second module part (2) arepairwise connected to each other via the connectingstructures(32).

12. The module (10) according to one of claims 1 to 10,wherein− a number of the connecting structures (32) is small er thana number of the first foils (12) and / or smaller tha n anumberofthe second foils(22),and− some but not all of the first foils (12) of the fir stmodule part(1)and some butnotallofthe second foils (22) of the second module part (2) are pairwise con nectedto each othervia the connecting structures(32).

13. The module (10) according to one of the previou s claims,wherein a number of the first foils (12), the first isolatingstructures (13), the second foils (22) and / or of th e secondisolating structures(23)isfrom 3 to 150.

14. The module (10) according to one of the previou s claims,wherein the module (10) is an electric bushing, cab letermination oran instrumenttransformer.

15. A method for producing a module (10) comprising :− providing a first module part (1) comprising a firs telectrical conductor (11), first foils (12) and fir st P2024,0870 WO N / P240004WO01 September11,2025 -40 - isolating structures (13) alternated with the first foils(12);− providing a second module part (2) comprising a sec ondelectrical conductor (21), second foils (22) and se condisolating structures (23) alternated with the secon d foils(22);and− forming a joint region (3) for joining together the firstmodule part (1) and the second module part (2), the jointregion (3) comprising connecting structures (32) an d aninsulation material(33),wherein the forming the joint region (3) comprises:− electrically connecting the first electrical conduc tor(11)to the second electricalconductor(21);− applying the connecting structures (32), each one o f theconnecting structures(32)electricallyconnecting one of first foils (12) to one of the second foils (12); a nd− filling the joint region (3) with the insulation ma terial(33) for electrically isolating at least the connec tingstructures(32)from each other.

16. The method of claim 15 for producing the module (10) ofanyofclaims2 to 14.

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