EP4244879A1 - Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension - Google Patents

Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension

Info

Publication number
EP4244879A1
EP4244879A1 EP21839136.5A EP21839136A EP4244879A1 EP 4244879 A1 EP4244879 A1 EP 4244879A1 EP 21839136 A EP21839136 A EP 21839136A EP 4244879 A1 EP4244879 A1 EP 4244879A1
Authority
EP
European Patent Office
Prior art keywords
switching device
coating
housing
ref
raktiv
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21839136.5A
Other languages
German (de)
English (en)
Inventor
Martin Koletzko
Steffen Lang
Igor Ritberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens AG
Siemens Energy Global GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Energy Global GmbH and Co KG filed Critical Siemens AG
Publication of EP4244879A1 publication Critical patent/EP4244879A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings

Definitions

  • the invention relates to an electrical switching device, in particular for medium and/or high voltage applications, having at least two contactable conductor elements that can be spaced apart by a movement device and a housing that defines a switching chamber and is made of one or more insulators, with parts of the switching chamber consisting of Can be made of metal, usually in the vicinity of the contact gap and two axially closing the housing, preferably metal, caps.
  • VEB vacuum circuit breakers
  • These cover a large part of medium-voltage switching applications, i.e. switching applications in the range from 1 kV to 52 kV, for example, as well as a relevant part in low-voltage systems.
  • a VCB While a VCB is closed most of the time, and therefore provides contacting of the conductor elements, its main task is the interruption of currents in AC systems under nominal conditions, i.e. in particular for switching nominal currents on and off, or preferably for interrupting currents under fault conditions , especially short circuits to interrupt and protect the systems .
  • Other applications include pure switching of load currents using contacting conductor elements, mostly used in low and medium voltage systems.
  • the vacuum interrupter (VI, also vacuum interrupter) is the core element of a VCB.
  • a vacuum interrupter usually has a pair of contacts which are formed by corresponding conductor elements, at least one of which can be moved by means of a movement device in order to be able to bring about the open and closed states of the switching device. In this case, one conductor element is usually moved axially with respect to the other fixed conductor element.
  • the contacts can be made from current-conducting bolts, in particular those made of metal, which provide both current and heat conduction and the mechanical means to hold and/or move the contacts.
  • a VI also includes a vacuum-tight housing and the movement device mentioned and can also include a metal bellows, which is connected to the housing on one side and to the moving conductor element, in particular the moving bolt, on the other side.
  • the housing is essentially formed by an insulating component, i.e. an insulator, for example a ceramic tube, which is connected to the conductor elements via connecting elements, with metal caps or the like being used, for example, to form the switching chamber, the insulating component in the axial direction to lock .
  • the switching device When the switching device is in an open state, it is necessary to isolate the rated voltage of the system as well as high amplitude surge voltages that can be triggered by a lightning strike on the system, for example.
  • the switching device changes from the closed to the open state, hence the contacts of the conductor elements are spaced, rated currents or short-circuit currents must be interrupted, which lead to the appearance of transient voltage spikes across the VI, which are significantly higher than the AC voltage ratings of the system.
  • High voltages in vacuum systems usually generate free electrons through field emission processes when the electric field strength is sufficiently high.
  • the acceleration of the electrons in the high electric fields increases the kinetic energy of these electrons, for example up to energies exceeding a few tens or even hundreds of KeV.
  • the interaction of these high-energy electrons with the housing structures results in the production of high-energy X-rays that can exit the vacuum interrupter.
  • the fault current within the vacuum interrupter is minimal and does not generate any appreciable X-ray radiation
  • circumstances can arise, for example if transient voltage peaks of high amplitude occur in which the resulting X-ray radiation generates free electrons on and/or near the outer surface of the insulator.
  • These electrons can be accelerated by the electric fields on and near the insulator surface, disturbing the electric field distribution in sensitive areas and leading to gas breakdown, leading to failure of the vacuum interrupter operation.
  • a shielding element which can also be made of metal, be provided in the contacting area of the conductor elements to intercept free metal particles of the conductor elements, but this also has an influence on the field distribution within the switching chamber, but also on the insulator.
  • the housing of the switching chamber and in particular the insulator, which is usually made of ceramic, must be able to withstand high voltages across the respective surface, even if X-rays and free electrons are present or, in some cases, even then , when the insulator is contaminated by dust particles that are electrostatically attached to the outer surface of the insulator . Since the isolator contributes significantly to the cost of a vacuum interrupter (or other switching device) and also negatively affects the cost of other structural elements of the vacuum interrupter (or other switching device), it is necessary to optimize the housing for maximum dielectric strength with minimum component size .
  • the subject matter of the present invention is an electrical switching device with at least two contactable conductor elements that can be spaced apart via a movement device and a housing that defines a switching chamber and that at least partially surrounds the conductor elements.
  • the housing of an electrical switching device shows improved dielectric strength through an insulating, ref r2011- field-controlling coating if this coating is insulating and is partially or completely applied to the outside of the housing and thus the boundary surface of the housing to the environment - z.
  • the coating preferably has a significantly higher permittivity than a conventional protective lacquer, which in turn is preferably not due to the permittivity of the matrix material, ie the binder, but to the permittivity of the fillers contained therein, which particularly preferably have a high lattice polarization.
  • a high permittivity of the polymeric and preferably organic matrix material is not advantageous due to the fear of degradation effects, because organic materials do not show lattice polarization but what is known as orientation polarization.
  • Grid polarization is the property of a material in the form of a solid crystal lattice - for example ceramic - that has ionic character, i.e. internal dipoles, and "only" reacts to the presence of an electric field by slightly shifting the individual ions within the lattice .
  • the stability of this material in the electrical field remains high, even at a relatively high switching frequency of—for example, 50 Hz—and with high field strengths present.
  • Permittivity refers to the ability of a material to polarize through electric fields. Permittivity is a material property of electrically insulating polar or non-polar compounds that only becomes apparent when these compounds are exposed to an electric field.
  • the matrix material can be selected from the group consisting of elastomers, duroplastics, thermoplastics and/or glass.
  • the various coating methods for producing the coating can be selected accordingly.
  • the matrix material is preferably applied as a paint, in particular in the form of a wet paint or powder paint.
  • Other application methods such as spraying, dipping, potting etc. are conceivable, but they are not in the foreground given the current state of research into the technology.
  • a major advantage of application as a powder paint and/or wet paint is that the refractive-controlling coating produced is free of pores. Although this type of freedom from pores is also obtained by encapsulation, the homogeneity of the coating generally suffers, particularly at the edges.
  • the matrix When applied as a wet paint, this generally includes solvents which are not present in the matrix material or are only present in small amounts after the paint has dried.
  • the matrix consists of a polymeric matrix material, for example a polymeric resin, which is present in the form of a polymeric binder.
  • a polymer or a polymeric binder is referred to as a "polymeric matrix".
  • the polymeric matrix comprises in particular a resin or a resin mixture, such as epoxy resin, silicone elastomer, siloxane resin, silicone resin, polyvinyl alcohol, polyesterimide and similar duroplastic, thermoplastic synthetic materials, as well as any combinations , copolymers , blends and mixtures of the abovementioned resins and / or plastics
  • the matrix preferably contains fillers with a high permittivity compared to air, in particular refractive-dielectrically insulating fillers, such as ceramic fillers, which are polar and/or easily polarizable in an electric field.
  • fillers with a high permittivity compared to air in particular refractive-dielectrically insulating fillers, such as ceramic fillers, which are polar and/or easily polarizable in an electric field.
  • the materials for the filler(s) are preferably selected from class 1 ceramic materials, which meet high stability requirements and whose permittivities have a low dependence on temperature and field strength. These include, for example, compounds such as selected titanates, which exhibit reproducible low temperature coefficients and low dielectric losses. Their permittivity is largely independent of the field strength, which has advantages for the application under discussion here.
  • the ceramic materials that are particularly suitable here for the filler(s) have relative permittivities Er in the range of
  • the materials come into consideration that show an almost linear temperature profile of the capacitor capacitance.
  • these are in the form of one or more ceramic(s), in particular ceramic(s) with metal nitride, metal carbide, metal boride and/or metal oxides such as titanium dioxide, aluminum oxide, ceramics comprising selected compounds of titanate, are also suitable because of their field strength-independent permittivity.
  • oxides of metal alloys in any combination with all of the above-mentioned materials are particularly suitable for fillers exhibiting largely field strength-independent permittivity.
  • a mixture of finely ground paraelectrics such as titanium dioxide with admixtures of magnesium (Mg), zinc (Zn), zirconium (Zr), niobium (Nb), tantalum (Ta), cobalt (Co) and/or or strontium ( Sr ) .
  • the usual additives such as hardeners, accelerators and/or additives may be present in the amounts conventionally recognized as advantageous.
  • Both duroplastics and thermoplastics can be applied in the form of a powder coating.
  • a hardener is present when additive polymerisation takes place.
  • An accelerator, initiator and/or catalyst is used in all cases where resin is cured.
  • the matrix material is usually applied before, during, but preferably after the manufacture of the housing.
  • the ref rept-controlling layer through Coating is produced with the matrix material, by spraying, raking, dipping, brushing and/or other methods that allow the production of a thin homogeneous—in particular as homogeneous as possible and as pore-free as possible—coating applied.
  • the application method is preferably carried out automatically.
  • the ref ractive-controlling coating is preferably a filled coating of one or more matrix materials that can be organic, for example in the form of a polymer, or inorganic, for example as glass, in which the filler is introduced.
  • the amount of filler in the refractory-controlling coating can vary within wide limits. For example, a filler concentration of 1% by volume - i.e. the almost unfilled matrix material with a low refraction, which is almost exclusively caused by the dielectric barrier that forms the matrix material - up to a filling of 70% by volume in the coating present.
  • the preferred range for the amount of filler is between 20 and 60% by volume, in particular from 30% by volume to 40% by volume, of filling in the matrix material.
  • a filler based on iron oxide is introduced into a matrix of anhydride-hardened epoxy.
  • the unfilled matrix material - epoxy resin - shows a permittivity of 3.8 measured at 30°C under the conditions.
  • the aim is to increase the permittivity by lattice polarization, e.g. B. by adding solid, in particular crystalline, fillers.
  • the aim is not to achieve high permittivity through orientation polarization of the polymeric binder.
  • a polar plastic with a Tg at room temperature or lower would have exorbitantly high permittivities at 30 °C. But that should be avoided.
  • the reason is that the chemical sigma bonds of the polar groups are degraded in the course of operation with a polarization reversal of 50 times per second - this corresponds to 50 Hz and a correspondingly high electric field strength - and this changes the permittivity and other material properties.
  • the filler particles of the refractive control coating do not have a preferred shape, they can be of any shape and sizes are embedded in the matrix. For example, the filler particles are irregular after appropriate grinding.
  • Filled paints whose particles are as close as possible to a spherical shape, are more suitable for processing than other shapes, because the specific surface area is the lowest and the lowest possible processing viscosity is achieved with the same degree of filling.
  • the size of the fillers can vary. There can be different filler fractions in the filler.
  • the housing can be provided with differently filled coatings in different areas.
  • the level of the permittivity and the thickness of the applied ref ractive-control coating determine how strong the electric field is equalized.
  • thicknesses of the ref ractive-controlling coating of 10 ⁇ m to 5 mm, preferably in the range between 100 ⁇ m and 3 mm, particularly preferably in the range between 500 ⁇ m and 2 mm, have proven to be expedient.
  • the permittivity of the coating is used according to one embodiment of the invention—filled or unfilled—so that the electric field on the surface of the housing of the switching chamber is pushed away by the increased permittivity compared to the uncoated surface and local field overshoots are reduced. This is explained again in FIG. 2 and shown schematically.
  • an insulating gas such as nitrogen substance, air or sulfur hexafluoride. All these gases have a small permittivity.
  • the refractive-controlling coating is applied at least partially to at least one of the contacting sides of the housing.
  • the refractive-controlling coating is also a dielectric barrier that, applied to the metal electrodes, ensures that electrons have a much harder time getting out of the metal. Or, in other words, the electrical flashover between the electrodes is shifted towards higher voltages by the dielectric barrier. Due to the refractive field shift then again in addition to even higher voltages.
  • the ref ractive-controlling coating is provided on both metal caps of the housing, which axially close off the preferably cylindrical insulator body to form the switching chamber, in whole or in part in addition to the application on the insulator body.
  • the ref ractive-controlling coating covers the housing in whole or in part or in selected areas.
  • the refractive-controlling coating is applied, for example, directly to the housing surface or, for example, to a lower layer, such as a resistive layer according to EP 3146551 B1.
  • a lower layer, on which the refractively controlling coating is applied can be both a further refractively controlling layer and another, in particular a resistive layer according to EP 3146551 B1, but preferably also, deviating from this, a resistive-capacitive one layer , be .
  • the lower layer is preferably a thinner layer than the upper one, so that the layer thicknesses increase from the inside to the outside on the outer surface of the housing.
  • the matrix materials of the respective coatings are compatible with one another. It is preferred, for example, that the matrix materials are at least mutually inert, but advantageously they can be mixed with one another and/or in one another as desired. It is very preferred that the matrix materials of different layers—ie, for example, the matrix material of a refractively controlling coating according to an embodiment of the present invention and the matrix material of a resistive coating according to EP 3146551 B1—have the same or similar chemical composition.
  • the coatings can also be provided combined in the form of layer stacks, with a resistive coating according to EP 3146551 B1 preferably being provided on the insulating areas of the housing of the switching device, such as on a ceramic cylinder, whereas the refractively controlling coating is particularly on the caps of the Housing, so the contacting areas is provided.
  • both coatings can extend over one another as desired and in particular also over all areas of the housing on the outside.
  • a resistive coating is a so-called "ohmic coating” with an adjustable resistance, whereby there is always a residual conductivity.
  • the refractive field-controlling coating is an insulating dielectric coating.
  • particularly suitable designs are those in which the refractory-controlling coating is not applied to the full surface of the housing, but only partially covers the housing. In this case, it is particularly preferred if the ref ractive-controlling coating is applied to the caps, in particular to the metal caps and/or to the edges that form the caps with the insulator body.
  • the ref ractive-controlling coating also extends—forming an edge—beyond the edge, for example also onto the surface of the insulator body.
  • the lower layer covers the outer surface of the housing only partially, in particular that the lower layer is applied in the form of a resistive-capacitive layer and the upper ref r2011-controlling layer completely or partially covers the lower layer and the entire outer surface of the housing;
  • the resistive layer is applied over the entire surface of the outer surface of the housing, according to the present invention, in contrast, it can also only partially cover the housing on the outside, in particular it can also be in the form of a resistive-capacitive layer with a non-galvanic - So not via a contact - be applied electrically conductively connected area.
  • the bottom layer is thinner than the top layer.
  • the refractive-controlling layer lies on the resistive layer.
  • FIG. 1 A switching device according to the present invention is shown in FIG.
  • FIG. 1 shows a switching device according to one embodiment of the present invention as a vacuum tube
  • FIG. 2 shows schematically the effect of a refractively controlling coating on a housing surface of a housing of a switching device according to an exemplary embodiment of the invention.
  • Figure 1 shows in the form of a principle sketch z ze from an exemplary embodiment of a switching device 1 according to the invention, here a vacuum interrupter.
  • a housing 3 composed here of two tubular ceramic parts, i.e. insulator body 2, is closed by metal caps 4, which form areas with electrical contacts, and defines a switching chamber 5, into which two conductor elements 6, designed as bolts for example, with contacts 7 are guided are .
  • the lower one of the conductor elements 6 is designed to be movable according to the arrow 8 and the indicated movement device 9 and can be displaced in the direction of extension 10 of the conductor elements 6, which also forms the axis of symmetry of the switching device 1, in order to bring the contacts 7 into contact or to space them apart, in the present case an open, ie spaced, state of the switching device 1 is shown. Due to the mobility of the lower conductor element 6, it is coupled to the metal cap 4 via a metal bellows 11; The metal caps 4 are thus conductively connected to the conductor elements 6 on both sides.
  • the invention also relates to gas switches in which the gas is present inside the switch.
  • the gas circuit breakers also included here mean those in which gas is used on the one hand as a switching medium and on the other - after it has been switched off successfully - as an insulating medium.
  • SF6 is used nowadays. Since SF6 is to be replaced as a strong greenhouse gas, switches with CO2, fluoronitrile or other alternative gases are also conceivable in the future.
  • a metal shielding element 12 (vapor shield) is provided in the contacting area in the switching chamber 5.
  • this shielding element 12 also ensures a distortion of the electric field, so that in an area behind the shielding elements there would be a lower electric field during operation than in the "unshielded" areas, where charges can accumulate, for example, and thus can provide further field distortions, which could question the functionality of the switching device 1.
  • the exemplary embodiment sketched here provides for a refractory-controlling coating to be applied to the outer surface of the housing 3, i.e. both to the insulator body 3 and to areas of the electrical contacts--i.e. the caps 4 13 according to an exemplary embodiment of the invention.
  • the ref ractive-controlling and - here over the entire surface - applied coating 13 of the embodiment shown here comprises a polymeric matrix with a high-permittive filler f, made of a ceramic material E r in the range of greater than / equal to 2 to 200 , preferably from 10 to 100 .
  • the filler is contained in the matrix at 30% by volume. It is a mixture of titanium dioxide and aluminum oxide particles.
  • the ref ractive-controlling coating 13 is relatively cheap in terms of material price and relatively easy - even automated - can be sprayed on. Their presence can be detected relatively easily using a scanning electron microscope and elemental analysis.
  • FIG. 2 shows schematically the effect of a refractive-controlling coating on a housing outer surface like the housing 3 shown in FIG.
  • Figure 2 shows schematically the course of the field and equipotential lines 15, 14 each at a triple point, right half with a refractive-controlling coating 13 and left for comparison without such a coating, according to the prior art.
  • the field lines 15 on the left run unbroken from the metal cap 4 into the surrounding gas, e.g. B. Air . This can result in lightning discharges 16 .
  • the field lines 15 are broken at the transition from the coating with high permittivity into the surrounding air with low permittivity - see area 17 - as a result both the equipotential lines 14 and the field lines 15 become wide pulled apart to prevent arcing.
  • the length of the housing 3 of a switching device 1 and thus the overall length of the electrical switching device 1 can be reduced by the refractive-controlling coating 13 , as is proposed here for the first time for this application.
  • a housing 3 could be manufactured for a specific voltage level. Exactly this housing 3 could then be coated with the refractively controlling coating 13 according to one embodiment of the present invention, and thus be usable for the next higher voltage level. In terms of process technology, this results in a design that can be used for two voltage levels, with the same two The housing 3 for two switching devices 1, different voltage levels can be used.
  • the only difference between the two housings is the additional coating 13 that controls refraction.
  • FIG. 3 shows the graphs for measuring the permittivities of the filled plastics mentioned by way of example and the unfilled reference sample of pure matrix material, ie 0% by weight filling with iron oxide. The measurements were carried out with a device from EPRO Gallspach GmbH "www . epro . at" Type : ITTD 2000 ; Mains : 90- 240V / 50- 60Hz .
  • the solid line shows the permittivity of the reference sample
  • the dashed graph shows the example with 30% by weight iron oxide
  • the graph shown with dash-dot-dash shows the sample filled with 20% by weight iron oxide.
  • the coating comprising matrix material and filler, preferably has a permittivity greater than 4, in particular in the range from 3 to 150, preferably from 4 to 100 and particularly preferably from 5 to 50, in each case at room temperature.
  • the present invention is not limited to vacuum tubes, but relates to other switches, for example gas-insulated switches—for example those with SF6 and/or clean air—as the switching gas.
  • gas-insulated switches for example those with SF6 and/or clean air
  • this is usually only used as an insulation medium and is not located in the interrupter unit, where the arc occurs and the switching operation takes place.

Landscapes

  • Organic Insulating Materials (AREA)
  • Insulating Bodies (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Inorganic Insulating Materials (AREA)
  • Insulators (AREA)

Abstract

L'invention concerne un dispositif de commutation électrique, en particulier pour des utilisations à moyenne et/ou haute tension, comprenant : au moins deux éléments conducteurs qui peuvent être placés à distance l'un de l'autre et mis en contact à l'aide d'un dispositif de déplacement ; et un boîtier qui forme une chambre de disjoncteur et qui est constitué d'un isolant et de deux capuchons métalliques qui ferment axialement le boîtier. Selon l'invention, un revêtement, qui présente une permittivité élevée ou une permittivité élevée par rapport à l'air ambiant et qui est constitué d'une matière plastique, notamment d'une matière plastique chargée, est appliqué sur tout ou partie de la surface de boîtier d'un interrupteur à vide, de sorte que les lignes de champ sont interrompues en des points critiques, notamment en des points triples, et que la formation d'arcs est empêchée dans la mesure du possible.
EP21839136.5A 2020-12-15 2021-12-14 Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension Pending EP4244879A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20214203.0A EP4016576A1 (fr) 2020-12-15 2020-12-15 Dispositif de commutation électrique pour applications moyenne et/ou haute tension
PCT/EP2021/085728 WO2022129073A1 (fr) 2020-12-15 2021-12-14 Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension

Publications (1)

Publication Number Publication Date
EP4244879A1 true EP4244879A1 (fr) 2023-09-20

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP20214203.0A Pending EP4016576A1 (fr) 2020-12-15 2020-12-15 Dispositif de commutation électrique pour applications moyenne et/ou haute tension
EP21839136.5A Pending EP4244879A1 (fr) 2020-12-15 2021-12-14 Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20214203.0A Pending EP4016576A1 (fr) 2020-12-15 2020-12-15 Dispositif de commutation électrique pour applications moyenne et/ou haute tension

Country Status (6)

Country Link
US (1) US20240047159A1 (fr)
EP (2) EP4016576A1 (fr)
JP (1) JP2023554041A (fr)
KR (1) KR20230118954A (fr)
CN (1) CN116848608A (fr)
WO (1) WO2022129073A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004519836A (ja) * 2001-05-30 2004-07-02 アーベーベー・パテント・ゲーエムベーハー 少なくとも１つのバキュームブレーカギャップのための制御装置
JP4391115B2 (ja) * 2003-04-09 2009-12-24 三菱電機株式会社 エポキシ樹脂注型物品
DE102014213944A1 (de) 2014-07-17 2016-01-21 Siemens Aktiengesellschaft Elektrische Schaltvorrichtung für Mittel- und/oder Hochspannungsanwendungen
DE102017201326A1 (de) * 2017-01-27 2018-08-02 Siemens Aktiengesellschaft Isolatoranordnung für eine Hochspannungs- oder Mittelspannungsanlage

Also Published As

Publication number Publication date
JP2023554041A (ja) 2023-12-26
EP4016576A1 (fr) 2022-06-22
US20240047159A1 (en) 2024-02-08
KR20230118954A (ko) 2023-08-14
CN116848608A (zh) 2023-10-03
WO2022129073A1 (fr) 2022-06-23

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