Electric device with gasket system

Abstract

An electric device (100) comprises a gasket system (10) comprising a gasket (1) which is configured to be non-permeable for an insulating fluid used for the operation of the electric device. The gasket system further comprises an imbibing material (2) which is configured to absorb the insulating fluid used for the operation of the electric device. The gasket and the imbibing material are arranged one after the other in a region of the electric device, which is to be sealed so that, if the insulating fluid used for the operation of the electric device passes the gasket, the insulating fluid will hit the imbibing material.

Description

[0001]P2023,1336 WO N / P230085WO01 October30,2024 -1 - Description Electricdevice with gasketsystemThe present disclosure relates to a gasket system f or anelectricdevice and an electricdevice.Gaskets are used in electric devices to avoid leaka ge offluids used during operation of the electric device s.US 2007 / 159774 A1 discloses a sealed electro-techni cal devicecomprising a container housing a functional unit an d a fluidof liquid type. The device is sealed by a first sea ling jointand a second sealing joint, wherein a barrier eleme nt ispositioned between the sealing joints.The barrier elementispermeable with respect to the fluid and impermeable withrespect to the sealing substance making up the seco nd sealingjoint to allow checking impermeability of the first sealingjointbefore the second sealing jointisformed.US 2001 / 040037 A1 discloses a radio communication e quipmentwith a string-type waterproof packing provided at a n openingof the equipment body. In addition to that, a strin g-typewaterabsorbercomposed ofmaterialhaving greater elasticcontractibility than that of the waterproof packing is placedin a location more inside of the equipment body tha n thewater absorber such that intruding water is absorbe d also incase ofa failure ofthe waterproofpacking.One object to be achieved is to provide an electric devicecomprising a gasket system which contributes to a r eliableprevention ofleakage ofthe electricdevice. P2023,1336 WO N / P230085WO01 October30,2024 -2 -According to an embodiment, an electric device comp rises agasket system which comprises a gasket which is con figured tobe non-permeable for an insulating fluid used for t heoperation of the electric device. The gasket system furthercomprisesan imbibing materialwhich isconfigured to absorb the insulating fluid used forthe operation ofthe electricdevice. The gasket and the imbibing material are ar ranged oneafter the other in a region of the electric device, which isto be sealed so that,ifthe insulating fluid used fortheoperation of the electric device passes the gasket, theinsulating fluid willhitthe imbibing material.While the cost of gaskets usually represents less t han 1% ofthe costs of an electric device, the costs associat ed withfixing damage caused by impacts and repairing leaks representa much largerportion ofthe warrantyexpensesfor a company.Regardless of the quality controls on the gasket ma terialsand the device production, there are still a number of casesevery year in which electric devices leak insulatin g fluid.Due to the increasing relevance of environmental as pects,customers are not only far more sensitive to such i ssues, butalso wantimmediate action to repairand eliminate theeffects of these leaks. This results in major costs for acompany. The presentinvention is,interalia,based on therecognition that using an imbibing material in addi tion to agasket will prevent leakage much more reliably, the reforesaving costsand protecting the environment.The gasket is formed of a tight or non-permeable ma terial. Itmay be formed of a non-absorbing material. Properti es liketight, permeable, imbibing or absorbing herein refe r to the P2023,1336 WO N / P230085WO01 October30,2024 -3 -insulating fluid, if not stated otherwise. The gask et may bea solid element. It may be formed in one piece. For example,the gasket is ring-shaped. The gasket may be a tube or aband. For instance, the gasket is elastic so that i t can becompressed between two elements in order to increas e thesealing propertiesofthe gasket.The gasket is configured to be non-permeable for th einsulating fluid. This means that the gasket is non -permeableoratleastismeantto be non-permeable.Still,a certain amountofthe insulating fluid maypassthe gasket due toaging effects or damage or non-perfect placement in theelectricdevice.The imbibing material is configured such that it ab sorbs orimbibes, respectively, the insulating fluid. For ex ample, theimbibing material is configured such that it expand s orswells, respectively, when it absorbs the insulatin g fluid.In thisway,itisexpected to / willclog a leakage path.Accordingly, the gasket system is a self-healing ga sketsystem.The imbibing material may be provided in one extend ed,contiguous and solid element or as a plurality of i ndividualbeads or fibers. The imbibing material may comprise apolymer / plastic or consist thereof. Imbibing materi als fordifferent fluids, like hydrocarbons, are on the mar ket andare known to the skilled person. For example, the i mbibingmaterial comprises or consists of styrene, pentadie ne,cyclopentadiene, butylene, ethylene, isoprene, buta diene,propylene ormixturesofsuch polymers. P2023,1336 WO N / P230085WO01 October30,2024 -4 -The imbibing material may be mixed with another mat erialwhich, for example, is non-absorbent for the insula tingfluid.Forinstance,the othermaterialisrubber.The imbibing material and the gasket are arranged o ne afterthe other so that the insulating fluid flowing alon g apotentialleakage path hasto passboth the gasket and the imbibing material,namelyone afterthe other.The gasketandthe imbibing material can thereby be handled indivi dually andindependently from each other. Particularly, the ga sket andthe imbibing material are at least two separate str uctures.The imbibing materialisnotpartofthe gasketorincorporated therein. For example, the gasket is fr ee of anyabsorbing / imbibing material. The insulating fluid used forthe operation ofthe electricdevice is, for instance, electrically insulating. F orexample,the insulating fluid isan organicfluid.The gasket and the imbibing material are arranged s uch that,if the insulating fluid used for the operation of t heelectricdevice passesthe gasket,itwillhitthe imbibingmaterial. In other words, along the potential leaka ge path,the gasket is arranged in front of the imbibing mat erial sothat, in the case of an imminent leakage, the insul atingfluid has to first pass the gasket before it hits t heimbibing material.Thatis,the gasketisarranged closerto the reservoircontaining the insulating fluid than theimbibing material. Thus, during normal operation of theelectric device, if the gasket seals sufficiently w ell, theimbibing material does not come into contact with t heinsulating fluid. P2023,1336 WO N / P230085WO01 October30,2024 -5 -According to a further embodiment, the imbibing mat erial isconfigured to imbibe organic fluids, like hydrocarb ons,particularlyoil.According to a further embodiment, the imbibing mat erial isincorporated in an imbibing structure which can be handled separatelyfrom the gasket.The imbibing structure and thegasket are, in particular, solid elements which can behandled separately. Since the imbibing material can berealized by an imbibing structure or can at least b eincorporated into an imbibing structure, all featur esdisclosed in connection with the imbibing material are alsodisclosed for the imbibing structure and vice versa . This isvalid, in particular, for the arrangement of the im bibingmaterial / structure with respect to the gasket or ot herelements.According to a further embodiment, the imbibing str ucture isa fabric. The fabric contains the imbibing material . Forexample, the fibers of the fabric consist of the im bibingmaterial.Alternatively,the imbibing materialmay beembedded between fibers of the fabric. In this case , thefabric may be formed of woven or non-woven syntheti c fibers,which are non-absorbentforthe insulating fluid.According to a further embodiment, the imbibing str ucture isa ribbon. The ribbon may be formed of the fabric sp ecifiedabove. Particularly, the imbibing structure is flex ible. Forinstance, in the ribbon, the imbibing material in t he form offibers or beads constitutes a binder mixed with rub ber.According to a further embodiment, the thickness of theimbibing structure is smaller than the thickness of the P2023,1336 WO N / P230085WO01 October30,2024 -6 - gasket.Herein,the thicknessofan elementis,inparticular, its diameter. For example, when the imb ibingstructure is a ribbon, a thickness measured perpend icularlyto its main extension direction is smaller than the thicknessofthe gasket.The thicknessofthe gasketisalso measuredperpendicularly to its main extension direction. Fo r example,the thicknessofthe imbibing structure isatmost 80% orat most50% ofthe thicknessofthe gasket.Since the imbibingmaterial swells when it absorbs the insulating flui d, itsdiameter increases so that it will clog the potenti al leakagepath.According to a further embodiment, the gasket syste mcomprises a sensor. The sensor is configured to det ect theinsulating fluid. For example, the sensor is a mois turesensor. The sensor may be configured to generate anelectrical signal, which is representative of wheth er theinsulating fluid has been detected or not. The elec tricalsignal can then be used to indicate to a user or op erator ofthe electric device that the insulating fluid has b eendetected. For example, the sensor or at least a pro bethereof,isarrangeable between the gasketand the imbibing material.According to a further embodiment, the imbibing mat erial isprovided in the form of beads and / or fibers. The be ads orfibers, respectively, may consist of the imbibing m aterial.The beads or fibers may be provided as individual a ndunconnected beads or fibers, for example in the for m of agross powder. Alternatively, the beads or fibers ma y beinterconnected with each other, for example when in corporatedinto a fabric as binders. For example, the beads ha vediameters of at most 2 mm or at most 0.1 mm. The di ameter of P2023,1336 WO N / P230085WO01 October30,2024 -7 -the fibers may be in the same range or smaller. The lengthsofthe fibersmaybe atmost5 mm oratmost1 mm.According to a further embodiment, the imbibing mat erial isconfigured to expand or swell when it absorbs the i nsulatingfluid. For example, the imbibing material is config ured suchthat it can absorb the insulating fluid until the v olume ofthe imbibing materialhasincreased bya factorof atleast2 oratleast10 and / orofatmost30 oratmost15.Particularly, when the imbibing material is provide d in theform of beads or fibers, the size / volume of the bea ds orfibers can increase by at least a factor of 2 or 10 and / or ofat most 30 or at most 15 when absorbing the insulat ing fluid.According to a further embodiment, the fibers of th einsulating materialare configured to expand their size,e.g.become longer, and solidify when imbibed with the i nsulatingfluid. This means, in particular, that the fibers b ecomerigid when absorbing the insulating fluid so that a mesh offibers becomes rigid when the insulating fluid is a bsorbed.According to a further embodiment, the gasket compr ises orconsistsofatleastone of:cork,rubber.According to an embodiment, the electric device com prises afirstelementand a second elementarranged on the firstelement and spaced apart from the first element suc h that agap is formed between the first and the second elem ent. Thegasket system is arranged in the gap and configured toprevent the passage of an insulating fluid used for theoperation ofthe electricdevice through the gap. P2023,1336 WO N / P230085WO01 October30,2024 -8 -The first and the second element may be formed of m etal. Forexample, the first element is a housing of the elec tricdevice in which the insulating fluid is stored or t hroughwhich the insulating fluid is flowing. The second e lement maybe a cover or a shutter or another element used for closingan opening in the firstelement.The gap between the first and second element may ha ve aheight, measured in a first direction. The height i s, forexample,atmost5 cm oratmost2 cm oratmost1 cm.Thefirst direction is, in particular, the direction fr om thefirstelementto the second element.The heightof the gap may lie in the range of0.6 timesto 0.8 timesthediameter / thickness of the gasket (in its uncompress ed state).A width of the gap is measured in a second directio n which isperpendicular to the first direction. The width is, inparticular,greaterthan the height,e.g.atleast two timesas great as the height. The width of the gap may li e in therange of 1.5 times to 2.5 times the diameter / thickn ess of thegasket(in itsuncompressed state).The gap may be formed groove-like. For instance, th e gap hasa length,measured in a third direction which isperpendicular to the first direction and perpendicu lar to thesecond direction. The length is, for instance, larg er thanthe height and the width. For example, the length o f the gapis at least 5 times or at least 10 times greater th an theheight and / or the width. The gap may be ring-shaped or may beformed asa frame,i.e.itmayform a closed loop. In thiscase, the third direction is a direction circumfere ntiallyalong the ring or frame, respectively. The length i s thenequalto the circumference ofthe closed loop. P2023,1336 WO N / P230085WO01 October30,2024 -9 -For example, in the second direction, the gasket an d theimbibing material are arranged one behind the other in thegap. The gasket and the imbibing material may be sp aced apartfrom each otherin the second direction.The space between the imbibing materialand the gasketin the second directionis, for example, free, i.e. only filled with gas. T he spacemay be atleast1 cm,forexample.The thickness / diameter of the gasket may be equal t o theheight of the gap so that the gasket completely ove rbridgesthe gap in the first direction. The gasket may be f lexibleand may be compressed in the first direction. In ot her words,the thickness of the gasket in an uncompressed stat e islargerthan the heightofthe gap.Forexample,in the gap, the gasketiscompressed byatleast10% and / orat most40%, particularlyby25%.The thicknessofthe imbibing material orthe imbibing structure is,forexample,smaller than the heightofthe gap. The gasketand / orthe imbibing materialmayextend overthe whole length ofthe gap.According to a further embodiment, the sensor of th e gasketsystem or at least the probe of the sensor is arran ged in thegap. For example, in the second direction, the sens or or theprobe is arranged between the gasket and the imbibi ngmaterial.According to a further embodiment, an opening is fo rmed inthe first element. The opening may be completely su rroundedby the first element. The above defined third direc tion maybe a direction circumferentially around the opening . For P2023,1336 WO N / P230085WO01 October30,2024 -10 -example, the opening is provided for maintenance ac tivitiesand / or for extracting or filling the insulating flu id out ofor into the electric device. In top view onto the o pening,the opening may be completely covered by the second element.For example, the second element projects beyond the openingin the above defined second direction.According to a further embodiment, the first elemen t isconfigured to receive an insulating fluid during th eoperation ofthe electricdevice.According to a further embodiment, the gasket is ar rangedcloser to the opening than the imbibing material. F orexample, in the second direction, the gasket is arr angedbetween the imbibing materialand the opening.According to a further embodiment, the gasket surro unds theopening. For example, the gasket completely surroun ds theopening.In thiscase,the gasketmaybe formed as a frame or a ring around the opening.According to a further embodiment, the imbibing mat erialsurroundsthe opening and the gasket.Forexample, the imbibing materialcompletelysurroundsthe opening and the gasket.In thiscase,the imbibing materialmaybe arrangedin the form of a ring or frame around the opening a nd thegasket.According to a further embodiment, in the first dir ection,the gap is delimited by the first and the second el ement.Particularly, the height of the gap is defined by t hedistance of the first and the second element in the firstdirection. P2023,1336 WO N / P230085WO01 October30,2024 -11 -According to a further embodiment, in the second di rection,the gap is delimited by a third and a fourth elemen t.Particularly, the width of the gap may be defined b y thedistance between the third and the fourth element i n thesecond direction.According to a further embodiment, in the first dir ection,the gasket and the imbibing material are arranged b etween thefirst and the second element. In the second directi on, thegasket and the imbibing material are arranged betwe en thethird and the fourth element.According to a further embodiment, the electric dev ice is apower electric device. For example, the electric de vice is apowertransformer.According to a further embodiment, the first elemen t is atank frame of the electric device. Alternatively, t he firstelementmaybe a flange ora cover.According to a further embodiment, the second eleme nt is acover or an electric component, like a valve or a b ushing ora sensor. Alternatively, the second element could a lso be ablind flange.According to a further embodiment, the third and th e fourthelementsare welded bars.Alternatively,the third and / orthefourth element could also be sides delimiting a gro ove,particularly a machined groove. In this case, the f irstelement and / or the second element may be the bottom of thegroove. P2023,1336 WO N / P230085WO01 October30,2024 -12 -Hereinafter, the gasket system and the electric dev ice willbe explained in more detail with reference to the d rawings onthe basis of exemplary embodiments. The accompanyin g figuresare included to provide a further understanding. In thefigures, elements of the same structure and / or func tionalitymay be referenced by the same reference signs. It i s to beunderstood that the embodiments shown in the figure s areillustrative representations and are not necessaril y drawn toscale. Insofar as elements or components correspond to oneanother in terms of their function in different fig ures, thedescription thereof is not repeated for each of the followingfigures. For the sake of clarity, elements might no t appearwith corresponding reference symbols in all figures .Figures 1 and 2 show an exemplary embodiment of the gasketsystem in two differentviews, Figures3 to 5 show an exemplaryembodimentofthe electric device in differentsituations,Figure 6 shows a second exemplary embodiment of the electricdevice, Figure 7 showsa third exemplaryembodimentofthe electric device,andFigure 8 shows a fourth exemplary embodiment of the electricdevice.An exemplary embodiment of the gasket system in a p erspectiveview is shown in figure 1. A cross-sectional view o f thisexemplary embodiment is shown in figure 2. The gask et system10 comprises a gasket 1 and an imbibing structure 2 0 P2023,1336 WO N / P230085WO01 October30,2024 -13 - comprising an imbibing material2.The gasket1 is formed asa ring and consists, for example, of cork or rubber . Theimbibing structure 20 is a ribbon arranged ring-lik e aroundthe gasket1.The imbibing structure 20 comprises, for example,a fabricin which the imbibing material2 isincorporated or which consists of the imbibing mate rial 2.The imbibing material 2 may be beads of fibers of a polymer.The imbibing material2 isconfigured to absorb an insulating fluid,particularlya hydrocarbon,like oil.As can be seen in figure 2, the cross-sections of t he gasket1 and the imbibing structure 20 are both oval or ro und. Thethickness / diameterofthe imbibing structure 20 is therebysmaller than the thickness / diameter of the gasket 1 .In contrast to what is shown in figures 1 and 2, th e imbibingmaterial2 could also be provided in the form ofa grosspowder of a plurality of unconnected beads of fiber s. Thisgrosspowdercan be sprinkled around the gasket1, for example in a ring form. Figure 3 showsa firstexemplaryembodimentofthe electricdevice 100. The electric device 100 is a power tran sformer.Figure 3 only shows a section of this power transfo rmer 100.The power transformer 100 comprises a first element 3 in theform of a tank frame. The tank frame 3 is filled wi th aninsulating fluid. An opening 30 is formed in the ta nk frame 3which forms a guide-through for a bushing 8. The bu shing 8has a second element 4 which is realized as a flang e of thebushing 8. The bushing 8 together with its flange 4completely covers the opening 30. The flange 4 ther ebyextends beyond the opening 30 and a gap 34 is forme d betweenthe tankframe 3 and the flange 4. P2023,1336 WO N / P230085WO01 October30,2024 -14 -The gap 34 is delimited in vertical direction or fi rstdirection, respectively, by the tank frame 3 and th e flange 4and is delimited in lateral direction or a second d irection,respectively, by a third element 5 and a fourth ele ment 6.Both elements5 and 6 are welded bars.The bushing 8 with theflange 4 is fixed to the tank frame 3 by means of b olts 7extending through the welded bars6.In order to prevent the insulating fluid in the tan k frame 3from leaking out of the electric device 100 via the gap 34, agasket system is arranged in the gap 34. The gasket systemmay be the gasket system 10 of figures 1 and 2. The reby, thering-shaped gasket 1 and the ring-shaped imbibing s tructure20 may completely surround the opening 30. The gask et 1 islocated closerto the opening 30 than the imbibing structure 20.As can be seen in figure 3, the thickness of the ga sket 1 ischosen such that it extends over the whole height o f the gap34, i.e. adjoins the tank frame 3 on one side and t he flange4 on the other side. This provides a first hurdle f or theinsulating fluid when it tries to leave the electri c device100 via the gap 34.The thickness or diameter of the imbibing structure 20 issmaller than the height of the gap 34 so that the i mbibingstructure 20 onlyadjoinsthe tankframe 3.Figure 4 shows a situation in which a part of the i nsulatingfluid enters into the gap 34. The gasket 1 is confi gured toseal the gap 34 so that the insulating fluid cannot pass thegasket 1. However, due to aging effects or damage t o the P2023,1336 WO N / P230085WO01 October30,2024 -15 -gasket 1 or vibrations during operation, a small po rtion ofthe insulating fluid may still pass the gasket 1. T heimbibing structure 20 is provided for this situatio n. Theimbibing structure 20 would then absorb the insulat ing fluidand would therefore prevent leakage of the insulati ng fluidoutofthe electricdevice 100.Figure 5 shows the situation after a certain amount of theinsulating fluid has passed the gasket 1 and has co me intocontact with the imbibing structure 20. The imbibin g material2 has absorbed the insulating fluid. Thereby, the s ize orvolume, respectively, of the imbibing material 2 ha sincreased. For example, the beads or fibers have in creasedtheirvolume up to 27 timestheiroriginalvolume. Asaconsequence, the imbibing structure 20 has also exp anded inthe first direction so that the gap 34 is now clogg ed by theimbibing structure 20. This “repairs” the failure o f thegasket 1 to some extent. Thus, the gasket system de scribedherein realizes a self-repairing gasket. It is also notnecessary to replace the imbibing structure 30 or t heimbibing material 2, respectively, since the capaci ty forabsorbing the insulating fluid is very large. The i mbibingmaterial2 is,forexample,notabsorbing waterso thattheimbibing structure 20 would not help to prevent the ingressofmoisture.Figure 6 shows a second exemplary embodiment of the electricdevice 100. Also here, the electric device 100 is a powertransformer. In the present case, however, the open ing 20 isnot formed for the insertion of a bushing, but coul d be anopening for filling in or extracting the insulating fluid.The opening 30 is covered by a second element 4, wh ich is acoverorlid. P2023,1336 WO N / P230085WO01 October30,2024 -16 -The exemplary embodiment of the electric device 100 of figure7 deviatesfrom thatoffigure 6 in thatthe third and fourthelements, 5 and 6 respectively, that delimit the ga p 34 inthe second direction are not realized as welded bar s, but arerealized by sides of the tank frame which delimit a machinedgroove in the tank frame. The first element 3, deli miting thegap 34 in the firstdirection,isformed bya main bodyofthe tank frame or a bottom side of the machined gro ove,respectively.Figure 8 shows an exemplary embodiment of the elect ric device100 which is basically the same as that of figure 6 . However,inside the gap 34, a sensor 12 or a probe of the se nsor 12,respectively, is arranged laterally between the imb ibingmaterial 2 and the gasket 1. The sensor 12 is confi gured todetect the insulating fluid. For example, the senso r 12 isconfigured to provide an electrical signal which isrepresentative ofwhetherthe insulating fluid has beendetected or not. This electrical signal can then be used toinform an operator of the electric device 100 wheth erinsulating fluid is between the gasket 1 and the im bibingmaterial 2 or not. An operator can then react accor dingly.The embodiments shown in the Figures 1 to 8 as stat edrepresent exemplary embodiments of the gasket syste m and theelectricdevice.Therefore,theydo notconstitute a completelist of all embodiments according to the gasket sys tem andthe electric device. Actual gasket systems and elec tricdevices may vary from the embodiments shown in term s ofarrangementsand elements,forexample. P2023,1336 WO N / P230085WO01 October30,2024 -17 - Reference sign list: 1 gasket 2 imbibing material 3 firstelement / tankframe 4 second element / cover / flange5 third element / welded bar / side of machined gro ove6 fourth element / welded bar / side of machined gr oove8 bushing 7 bolt 10 gasketsystem 12 sensor 20 imbibing structure 30 opening 24 gap / groove 100 electricdevice / powertransformer

Claims

P2023,1336 WO N / P230085WO01 October30,2024 -18 - Claims1. Electric device (100) comprising a gasket system (10), thegasketsystem (10)comprising- a gasket (1) which is configured to be non-permea ble for aninsulating fluid used for the operation of the elec tricdevice (100),and- an imbibing material (2) which is configured to a bsorb theinsulating fluid used for the operation of the elec tricdevice (100),wherein -the gasket(1)and the imbibing material(2)are arrangedone after the other in a region of the electric dev ice (100)which is to be sealed so that, if the insulating fl uid usedfor the operation of the electric device (100) pass es thegasket (1), the insulating fluid will hit the imbib ingmaterial(2). 2.The electricdevice (100)according to claim 1, wherein- the imbibing material (2) is configured to absorb theinsulating fluid in case of leakage through the gas ket (1),therebypreventing leakage ofthe insulating fluid outofthe electricdevice (100).

3. The electric device (100) according to any one o f thepreceding claims,wherein- the imbibing material (2) is configured to imbibehydrocarbons.

4. The electric device (100) according to any one o f thepreceding claims,wherein- the imbibing material (2) is incorporated in an i mbibingstructure (20) which can be handled separately from thegasket(1).P2023,1336 WO N / P230085WO01 October30,2024 -19 - 5.The electricdevice (100)according to claim 4, wherein- the imbibing structure (20) is a fabric containin g theimbibing material(2),and - the imbibing structure (20)isa ribbon.

6. The electric device (100) according to any one o f claims 4or5,wherein- the thickness of the imbibing structure (20) is s mallerthan the thicknessofthe gasket(1).

7. The electric device (100) according to any one o f thepreceding claims,furthercomprising- a sensor (12) which is configured to detect the i nsulatingfluid.

8. The electric device (100) according to any one o f thepreceding claims,wherein- the imbibing material (2) is provided in the form of beadsand / orfibers. 9.The electricdevice (100)according to claim 8, wherein -the beadsare configured to expand theirsize by atleastafactor of 10 when absorbing the insulating fluid an d / or- the fibers are configured to expand their size an d solidifywhen imbibed with the insulating fluid. 10.The electricdevice (100)according to anyone ofthe preceding claims,wherein- the gasket (1) comprises or consists of at least one of:cork,rubber. 11.The electricdevice (100)according to anyone ofthe preceding claims,whereinP2023,1336 WO N / P230085WO01 October30,2024 -20 -- the imbibing material (2) is configured to expand or swellwhen itabsorbsthe insulating fluid.

12. Electric device (100) according to any one of t hepreceding claims,comprising -a firstelement(3),- a second element (4) arranged on the first elemen t (3) andspaced apart from the first element (1) such that a gap (34)isformed between the first(3)and the second (4) element, wherein- the gasket system (10) is arranged in the gap (34 ) andconfigured to preventthe passage ofan insulating fluid usedfor the operation of the electric device (100) thro ugh thegap (34).

13. Electric device (100) according to claim 12, wh erein- an opening (30) is formed in the first element (3 ),- the first element (3) is configured to receive th einsulating fluid during the operation of the electr ic device(100), -the gasket(1)isarranged closerto the opening (30)than the imbibing material(2).

14. Electric device (100) according to claim 13, wh erein-the gasket(1)surroundsthe opening (30),- the imbibing material (2) surrounds the opening ( 30) andthe gasket(1).

15. Electric device (100) according to any one of c laims 12to 14,wherein- in a first direction, the gap (34) is delimited b y thefirst (3) and the second (4) element and, in a seco nddirection,the gap isdelimited bya third (5)and a fourthP2023,1336 WO N / P230085WO01 October30,2024 -21 -(6) element, wherein the second direction is perpen dicular tothe firstdirection,- in the first direction, the gasket (1) and the im bibingmaterial (2) are arranged between the first (3) and thesecond (4) element and, in the second direction, th e gasket(1) and the imbibing material (2) are arranged betw een thethird (5)and the fourth (6)element.

16. Electric device (100) according to claim 15, wh erein- the electric device (100) is a power transformer,- the first element (3) is a tank frame or a flange or acover,- the second element (4) is a cover, a blind flange or anelectric component, e.g. a valve, a bushing or a se nsor,- the third (3) and the fourth (4) element are weld ed bars orsidesdelimiting a machined groove.

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