EP4016576A1 - Dispositif de commutation électrique pour applications moyenne et/ou haute tension - Google Patents

Dispositif de commutation électrique pour applications moyenne et/ou haute tension Download PDF

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Publication number
EP4016576A1
EP4016576A1 EP20214203.0A EP20214203A EP4016576A1 EP 4016576 A1 EP4016576 A1 EP 4016576A1 EP 20214203 A EP20214203 A EP 20214203A EP 4016576 A1 EP4016576 A1 EP 4016576A1
Authority
EP
European Patent Office
Prior art keywords
switching device
coating
refractive
housing
controlling
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.)
Granted
Application number
EP20214203.0A
Other languages
German (de)
English (en)
Other versions
EP4016576B1 (fr
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
Original Assignee
Siemens AG
Siemens Energy Global GmbH and Co KG
Siemens Corp
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
Priority to HUE20214203A priority Critical patent/HUE069376T2/hu
Application filed by Siemens AG, Siemens Energy Global GmbH and Co KG, Siemens Corp filed Critical Siemens AG
Priority to ES20214203T priority patent/ES2994802T3/es
Priority to EP20214203.0A priority patent/EP4016576B1/fr
Priority to PCT/EP2021/085728 priority patent/WO2022129073A1/fr
Priority to KR1020237023780A priority patent/KR20230118954A/ko
Priority to EP21839136.5A priority patent/EP4244879A1/fr
Priority to US18/257,533 priority patent/US12518937B2/en
Priority to JP2023536128A priority patent/JP2023554041A/ja
Priority to CN202180093829.9A priority patent/CN116848608A/zh
Publication of EP4016576A1 publication Critical patent/EP4016576A1/fr
Application granted granted Critical
Publication of EP4016576B1 publication Critical patent/EP4016576B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 which can be spaced apart via a movement device and a housing which is made of one or more insulators and defines a switching chamber, parts of the switching chamber being able to be made of metal. usually in the vicinity of the contact gap and two, preferably metal, caps that close off the housing axially.
  • VEBs vacuum circuit breakers
  • These are core components in power transmission and distribution, particularly in their switching systems. They 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. Their use in high-voltage transmission systems, for example at voltages greater than 52 kV, is also increasing.
  • a VCB While a VCB is closed most of the time, meaning that the conductor elements are contacted, its main task is to interrupt currents in AC systems under nominal conditions, i.e. in particular to switch nominal currents on and off, or preferably to interrupt currents under fault conditions , especially short circuits to interrupt and protect the system.
  • 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.
  • one conductor element is moved axially with respect to the other fixed conductor element.
  • the contacts may be fabricated from conductive bolts, particularly metal, which provide both electrical and thermal conduction and the mechanical means to hold and/or move the contacts.
  • a VI also comprises a vacuum-tight housing and the aforementioned movement device and can also comprise 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, metal caps or the like being used, for example, which close the insulating component in the axial direction to form the switching chamber .
  • Inside the switching chamber there is a permanent high vacuum of less than 10 ⁇ -4 hPa or 10 ⁇ -4 mbar. The vacuum is necessary to ensure the "make-break" operations and to ensure the isolation properties of the switching device in the open state.
  • 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 transient voltages such as be triggered by lightning striking the system.
  • the switching device changes from the closed to the open state, thus spacing the contacts of the conductor elements, rated currents or short-circuit currents must be interrupted, which lead to the appearance of transient voltage spikes across the VI that 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 tens or even hundreds of KeV.
  • the interaction of these high-energy electrons with the housing structures leads to 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 produce any appreciable X-ray radiation
  • circumstances can arise, for example when transient voltage spikes of high amplitude occur, in which the resulting X-ray radiation produces 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, resulting in failure of the vacuum interrupter operation.
  • a shielding element which can also be made of metal, be provided in the contact 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 interrupter, and in particular the insulator, which is usually made of ceramic, must be able to withstand high voltages across the relevant surface, even in the presence of X-rays and free electrons, or, in some cases, even when the insulator is contaminated by dust particles electrostatically attached to the outer surface of the insulator. Since the insulator 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 well-known VIs are often built symmetrically to an - imagined - center plane of the tube in order to minimize the number of different components and the complexity of the structure.
  • the real environment of the tube generally strongly distorts the electric field, so that areas of the tube are strongly electric - in the sense of a high mean electric field strength.
  • the subject 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.
  • 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, immersion, 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.
  • this When applied as a wet paint, this usually includes solvents that 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 includes in particular a resin or a resin mixture, such as epoxy resin, silicone elastomer, siloxane resin, silicone resin, polyvinyl alcohol, polyester imide and similar duroplastic, thermoplastic plastics, as well as any combinations, copolymers, blends and mixtures of the above 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 show reproducibly 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.
  • Fillers made of a material which is commercially available from the field of capacitor ceramics and is therefore comparatively inexpensive and available in sufficient quantities are preferred.
  • the materials come into consideration that have an almost linear temperature profile of the capacitor capacitance demonstrate.
  • 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 that exhibit 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 Suitable for strontium (Sr).
  • customary 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 instances where resin is cured.
  • the matrix material is usually applied before, during, but preferably after the manufacture of the housing.
  • the refractive-control layer which is produced by coating with the matrix material, by spraying, doctoring, dipping, brushing and / or other methods, the production of a thin homogeneous - in particular as homogeneous as possible and as non-porous as possible - allow coating applied.
  • the application method is preferably carried out automatically.
  • the refractive-controlling coating is preferably a filled coating of one or more matrix materials, which 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 refractive control coating can vary within wide limits.
  • a filler concentration of 1% by volume - i.e. the almost unfilled matrix material with a relatively low refraction, which is almost exclusively caused by the dielectric barrier that forms the matrix material - can be present in the coating up to a filling of 70% by volume.
  • 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.
  • the filler particles of the refractive control coating do not have a preferred shape, they can be embedded in the matrix in any shape and size.
  • the filler particles are irregular after appropriate grinding.
  • Filled paints whose particles are as close as possible to a spherical shape, are better suited 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 may vary. Different filler fractions can be present in the filler.
  • the housing can be provided with differently filled coatings in different areas.
  • the field lines are broken more than with others.
  • the level of the permittivity and the thickness of the applied refractive-controlling coating determine how much the electric field is equalized.
  • thicknesses of the refractive-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, thus reducing local field overshoots. This is explained again in FIG. 2 and shown schematically.
  • an insulating gas such as nitrogen, air, or sulfur hexafluoride would typically be present at the surface of the housing. All these gases have a comparatively small permittivity.
  • the triple point for example, is the area of the housing in which a metal electrode, a solid insulator and a gaseous insulator - in this case the surrounding gas - come together.
  • the refractive-controlling coating is applied at least partially to at least one of the contacting sides of the housing. This is particularly so because the refractive-controlling coating is also a dielectric barrier that, applied to the metal electrodes, ensures that electrons have a much harder time escaping from the metal. Or, in other words, the electrical flashover between the electrodes is shifted to higher voltages by the dielectric barrier. Due to the refractive field shift then again in addition to even higher voltages.
  • the refractive-controlling coating is preferably provided on both metallic 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 being applied to the insulator body.
  • the refractive control coating thus 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 after the EP 3146551 B1 .
  • a lower layer, on which the refractive-controlling coating is applied can be both a further refractive-controlling layer and another, in particular a resistive layer after the EP 3146551 B1 , but preferred also, deviating from this, a resistive-capacitive layer.
  • 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 refractive control coating according to an embodiment of the present invention and the matrix material of a resistive coating according to the 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 the EP 3146551 B1 is preferably provided on the insulating areas of the housing of the switching device, such as on a ceramic cylinder, whereas the refractively controlling coating is provided in particular on the caps of the housing, ie the contacting areas.
  • both coatings can extend over one another as desired and in particular also over all areas of the housing on the outside.
  • the refractive-controlling coating is not applied over the entire surface of the housing may be mentioned here as being particularly suitable. but only partially covers the housing. In this case, it is particularly preferred if the refractive-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 refractive-controlling coating also extends—forming an edge—beyond the edge, for example also onto the surface of the insulator body.
  • the insulator body itself is still coated, for example provided with a resistive coating, or not.
  • the resistive layer if it is applied over the entire surface of the outer surface of the housing, according to the present invention it can, in contrast, also only partially cover the outside of the housing, in particular it can also be in the form of a resistive-capacitive layer with a non-galvanic - i.e. not via a contact - be applied electrically conductively connected area.
  • the lower layer is thinner than the upper layer.
  • the refractive-controlling layer lies on the resistive layer.
  • FIG. 1 shows an embodiment of a switching device 1 according to the invention, here a vacuum interrupter, in the form of a basic sketch.
  • a housing 3 composed here of two tubular ceramic parts, i.e. insulator bodies 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 for example as bolts, with contacts 7 are guided.
  • 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 space them apart, whereby presently an open, so spaced state of the switching device 1 is shown. Due to the mobility of the lower conductor element 6, this is coupled to the metal cap 4 via a metal bellows 11; the metal caps 4 are conductively connected to the conductor elements 6 on both sides.
  • the invention also relates to gas switches where the gas is inside the switches.
  • the gas circuit breakers also included here mean those in which gas serves as the switching medium on the one hand and - after successful disconnection - as the insulating medium on the other.
  • 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 (vapour shield) is provided in the contacting area in switching chamber 5.
  • this shielding element 12 also causes 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 that could call into question the functionality of the switching device 1.
  • a refractive-controlling coating 13 according to a Embodiment of the invention is located.
  • the refractive-controlling and - here over the entire surface - applied coating 13 of the embodiment shown here comprises a polymer matrix which is filled with a high-permittivity filler made of a ceramic material ⁇ r in the range of greater than/equal to 2 to 200, preferably from 10 to 100 , is filled.
  • the matrix contains 30% by volume of the filler. It is a mixture of titanium dioxide and aluminum oxide particles.
  • the refractive-controlling coating 13 is relatively inexpensive in terms of material price and can be sprayed on relatively easily—also automatically. Their presence can be detected relatively easily using a scanning electron microscope and elemental analysis.
  • the figure 2 shows schematically the effect of a refractive control coating on a housing outer surface like that in figure 1 housing 3 shown.
  • figure 2 shows schematically the course of the field and equipotential lines 15, 14 at each 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, eg 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 - thereby both the equipotential lines 14 and the field lines 15 far apart, so that no arcs occur.
  • the length of the housing 3 of a switching device 1 can be reduced by the refractive-controlling coating 13, as proposed for this application for the first time, and thus the overall length of the electrical switching device 1.
  • 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 an 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 housings 3 being usable for two switching devices 1 of different voltage levels!
  • 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 insulating medium and is not located in the interrupter unit, where the arc occurs and the switching operation takes place.

Landscapes

  • Organic Insulating Materials (AREA)
  • Insulators (AREA)
  • Insulating Bodies (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Inorganic Insulating Materials (AREA)
EP20214203.0A 2020-12-15 2020-12-15 Dispositif de commutation électrique pour applications moyenne et/ou haute tension Active EP4016576B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
ES20214203T ES2994802T3 (en) 2020-12-15 2020-12-15 Electrical switching device for medium and / or high voltage applications
EP20214203.0A EP4016576B1 (fr) 2020-12-15 2020-12-15 Dispositif de commutation électrique pour applications moyenne et/ou haute tension
HUE20214203A HUE069376T2 (hu) 2020-12-15 2020-12-15 Elektromos kapcsolószerkezet közép- és/vagy nagyfeszültségû alkalmazásokhoz
KR1020237023780A KR20230118954A (ko) 2020-12-15 2021-12-14 중전압 및/또는 고전압 용도들을 위한 전기 스위칭디바이스
PCT/EP2021/085728 WO2022129073A1 (fr) 2020-12-15 2021-12-14 Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension
EP21839136.5A EP4244879A1 (fr) 2020-12-15 2021-12-14 Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension
US18/257,533 US12518937B2 (en) 2020-12-15 2021-12-14 Electric switching device for medium- and/or high-voltage uses
JP2023536128A JP2023554041A (ja) 2020-12-15 2021-12-14 中電圧および／または高電圧用途のための電気開閉装置
CN202180093829.9A CN116848608A (zh) 2020-12-15 2021-12-14 用于中压和/或高压应用的电气开关设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20214203.0A EP4016576B1 (fr) 2020-12-15 2020-12-15 Dispositif de commutation électrique pour applications moyenne et/ou haute tension

Publications (2)

Publication Number Publication Date
EP4016576A1 true EP4016576A1 (fr) 2022-06-22
EP4016576B1 EP4016576B1 (fr) 2024-10-02

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP20214203.0A Active EP4016576B1 (fr) 2020-12-15 2020-12-15 Dispositif de commutation électrique pour applications moyenne et/ou haute tension
EP21839136.5A Withdrawn EP4244879A1 (fr) 2020-12-15 2021-12-14 Dispositif de commutation électrique pour utilisations à moyenne et/ou haute tension

Family Applications After (1)

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

Country Status (8)

Country Link
US (1) US12518937B2 (fr)
EP (2) EP4016576B1 (fr)
JP (1) JP2023554041A (fr)
KR (1) KR20230118954A (fr)
CN (1) CN116848608A (fr)
ES (1) ES2994802T3 (fr)
HU (1) HUE069376T2 (fr)
WO (1) WO2022129073A1 (fr)

Citations (4)

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Publication number Priority date Publication date Assignee Title
WO2002097839A1 (fr) * 2001-05-30 2002-12-05 Abb Patent Gmbh Commande d'au moins un trajet de commutation a vide
JP2004306528A (ja) * 2003-04-09 2004-11-04 Mitsubishi Electric Corp エポキシ樹脂注型物品
WO2018137903A1 (fr) * 2017-01-27 2018-08-02 Siemens Aktiengesellschaft Ensemble d'isolation pour installation haute ou moyenne tension
EP3146551B1 (fr) 2014-07-17 2020-06-24 Siemens Aktiengesellschaft Appareil de commutation pour moyenne ou haute tension

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US5597992A (en) * 1994-12-09 1997-01-28 Cooper Industries, Inc. Current interchange for vacuum capacitor switch
US5808258A (en) * 1995-12-26 1998-09-15 Amerace Corporation Encapsulated high voltage vacuum switches
US20040242034A1 (en) * 2003-05-30 2004-12-02 Hubbell Incorporated Electrical assembly and dielectric material
US7397012B2 (en) * 2005-05-31 2008-07-08 Thomas & Betts International, Inc. High current switch and method of operation
US7579571B2 (en) * 2006-05-31 2009-08-25 Thomas & Betts International, Inc. Visible open indicator
US20100314357A1 (en) * 2009-06-12 2010-12-16 Hitachi, Ltd. Resin-molded vacuum valve
IN2014KN02943A (fr) * 2012-06-12 2015-05-08 Hubbell Inc
JP2016528362A (ja) * 2013-08-22 2016-09-15 ダウ グローバル テクノロジーズ エルエルシー 回路遮断器極部分を製造するための方法
EP2975710B1 (fr) 2014-07-18 2017-09-06 General Electric Technology GmbH Disjoncteur comportant un tube creux isolant
EP2996131B1 (fr) * 2014-09-12 2020-08-05 ABB Schweiz AG Pôle d'interrupteur à vide pour application dans un environnement sous haute pression
JP7143195B2 (ja) 2018-11-28 2022-09-28 株式会社東芝 真空バルブ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002097839A1 (fr) * 2001-05-30 2002-12-05 Abb Patent Gmbh Commande d'au moins un trajet de commutation a vide
JP2004306528A (ja) * 2003-04-09 2004-11-04 Mitsubishi Electric Corp エポキシ樹脂注型物品
EP3146551B1 (fr) 2014-07-17 2020-06-24 Siemens Aktiengesellschaft Appareil de commutation pour moyenne ou haute tension
WO2018137903A1 (fr) * 2017-01-27 2018-08-02 Siemens Aktiengesellschaft Ensemble d'isolation pour installation haute ou moyenne tension

Also Published As

Publication number Publication date
JP2023554041A (ja) 2023-12-26
HUE069376T2 (hu) 2025-03-28
US12518937B2 (en) 2026-01-06
WO2022129073A1 (fr) 2022-06-23
EP4016576B1 (fr) 2024-10-02
EP4244879A1 (fr) 2023-09-20
ES2994802T3 (en) 2025-01-31
US20240047159A1 (en) 2024-02-08
CN116848608A (zh) 2023-10-03
KR20230118954A (ko) 2023-08-14

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