EP3544032A1 - Elektrische vorrichtung mit gelverbundisolierung - Google Patents

Elektrische vorrichtung mit gelverbundisolierung Download PDF

Info

Publication number
EP3544032A1
EP3544032A1 EP18162517.9A EP18162517A EP3544032A1 EP 3544032 A1 EP3544032 A1 EP 3544032A1 EP 18162517 A EP18162517 A EP 18162517A EP 3544032 A1 EP3544032 A1 EP 3544032A1
Authority
EP
European Patent Office
Prior art keywords
gel
transformer
oil
tank
composite insulation
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
EP18162517.9A
Other languages
English (en)
French (fr)
Other versions
EP3544032B1 (de
Inventor
Adam Michalik
Bartlomiej Adamczyk
Wojciech Wysocki
Wojciech Piasecki
Jedrzej Banaszczyk
Dariusz Smugala
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.)
Hitachi Energy Ltd
Original Assignee
ABB Schweiz AG
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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP18162517.9A priority Critical patent/EP3544032B1/de
Publication of EP3544032A1 publication Critical patent/EP3544032A1/de
Application granted granted Critical
Publication of EP3544032B1 publication Critical patent/EP3544032B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/442—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from aromatic vinyl compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/005—Impregnating or encapsulating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/127—Encapsulating or impregnating

Definitions

  • the present disclosure relates to an electrical device with electrical insulation of a composite material.
  • thermo-reversible gel a composite material made from an inorganic particulate filler material, e.g. sand, and an oil-based thermo-reversible gel.
  • a dry insulation is obtainable which can be easily provided in a similar way as a liquid insulation, by impregnating the filler with the gel in liquid form at a temperature which is above the transition temperature (gelling temperature) of the thermo-reversible gel.
  • the insulation is essentially solid.
  • Advantages with using a gel instead of a liquid oil include reduced risk of leakage into the environment and reduced risk of splashing of hot or burning oil during an (unlikely) explosion due to e.g. transformer fault.
  • an electrical device comprising a composite insulation comprising an inorganic particulate filler impregnated with an oil-based thermo-reversible gel comprising a thickener, the gel being in solid form.
  • a method of encasing an electrical power device in a composite insulation comprises forming an oil-based thermo-reversible gel by adding a thickener to an electrically insulating oil.
  • the method also comprises filling the tank comprising the electrical power device with an inorganic particulate filler such that the electrical power device is surrounded by said filler.
  • the method also comprises heating the formed thermo-reversible gel to a temperature which is above the transition temperature of the gel, whereby the gel transitions to its liquid form.
  • the method also comprises pouring the heated gel into the filled tank, whereby the inorganic particulate filler is impregnated with the gel in liquid form to form the composite insulation.
  • the method also comprises cooling the thermo-reversible gel to a temperature which is below the transition temperature of the gel, whereby the gel impregnating the filler transitions to its solid form, encasing the electrical power device in the solid composite insulation within the tank.
  • thermo-reversible gels are known for impregnating power cable insulation, where the gel can be made sufficiently soft and resilient to allow the cable to be flexible.
  • WO 97/04466 relates to a High-Voltage Direct Current (HVDC) power cable comprising an insulation of a plurality of permeable tapes wound around the conductor.
  • An impregnating compound fills all voids among the tape layers.
  • the impregnating compound has a very steep slope of change of viscosity characteristics, the viscosity being high with a solid gel type structure at temperatures equal to and below the maximum operating temperature of the cable and being low with a thin liquid type structure at higher temperatures at which impregnation takes place.
  • 95% of the impregnating compound consists of alkane chains with chain lengths above 15 carbon units but no more than 2% of the chains have chain lengths above 28 carbon units.
  • WO 99/33066 discloses a dielectric gelling composition, exhibiting a thermo-reversible liquid-gel transition at a transition temperature, wherein the gel comprises an oil and a gelator with a block copolymer.
  • the gelling composition is used as an impregnant in an insulated direct current (DC) cable having at least one conductor and an impregnated insulation system.
  • the insulation system comprises a solid electrically insulating dielectric part with a porous, fibrous and/or laminated structure impregnated with the dielectric gelling composition.
  • US 6,391,447 relates to a method for manufacture of an electric device having at least one conductor and a porous, fibrous and/or laminated electrically insulating dielectric system comprising a solid electrically insulating part impregnated with a dielectric fluid, wherein the method comprises impregnating with a dielectric fluid, wherein a gelling additive is added to impart a high viscosity and elasticity to the fluid at conditions for which the device is designed to operate under.
  • Figure 1a illustrates an electrical device 1, here in the form of an electrical power device, here a transformer, 4 immersed in a composite insulation 3 within a transformer tank 2.
  • the composite insulation 3 is as discussed herein, a composite between an oil-based thermo-reversible gel and an inorganic particulate filler, e.g. sand.
  • FIG 1b illustrates another embodiment of an electrical device 1 here in the form of a transformer 4, which may or may not be combined with the embodiment of figure 1a .
  • the transformer 4 comprises a primary winding 5 which is immersed in the composite insulation 3 of the present disclosure, enclosed by a shell 6, the shell separating the primary winding 5 from the secondary winding 7.
  • the primary winding 5 is wound around a transformer core 8, outside of the secondary winding 7 which is also wound around the core 8.
  • the composite insulation 3 is as discussed herein, a composite between an oil-based thermo-reversible gel and an inorganic particulate filler, e.g. sand.
  • the electrical device 1 may comprise a transformer 4, e.g. as in any of the figures 1a and 1b , e.g. in the form of an instrument transformer or a power transformer, or any other type of voltage transformer, or a capacitor.
  • the electrical device 1 may be any electrical device with solid insulation, and a bushing is only an example thereof.
  • Other examples include, but are not limited to, instrument transformers, power transformers e.g. current and voltage transformers, capacitors and cable endings.
  • the oil can be replaced with a composite insulation 3 as per the present invention.
  • the insulation 3 may provide insulation to ground in the electrical device 1.
  • the operating voltage of the electrical device 1 may preferably be medium voltage (MV), up to 72 kV, but high voltage (HV) applications above 72 kV are possible as well.
  • the insulating gel 4 may act as a major insulation (between the high potential and ground) of the electrical device 1.
  • the oil may be any electrically insulating oil, e.g. mineral oil, aromatic oil, ester oil and/or paraffinic oil, e.g. iso-paraffinic oil, or a mixture thereof.
  • electrically insulating oil e.g. mineral oil, aromatic oil, ester oil and/or paraffinic oil, e.g. iso-paraffinic oil, or a mixture thereof.
  • the thickener may be a polymeric thickener e.g. SEPTON styrene thermoplastic elastomer containing block copolymers - e.g. SEPTONTM 1000-SERIES (SEP), SEPTONTM 4000-SERIES (SEEPS) from Kuraray.
  • a thickener comprising or consisting of SEEPSTM 4099 (a tri-block copolymer consisting of polystyrene-b-poly(ethylene-ethylene/propylene)-b-polystyrene) and/or SEPTM 1020 (a di-block copolymer consisting of polystyrene-b-poly(ethylene/propylene)) may be used.
  • SEEPSTM 4099 a tri-block copolymer consisting of polystyrene-b-poly(ethylene-ethylene/propylene)-b-polystyrene
  • SEPTM 1020 a di-block copolymer consisting of polystyren
  • the gel 4 may, in addition to the oil and thickener, one or several additives, such as an anti-oxidant as mentioned above, or any other additive may be added, e.g. up to 1 wt% of the gel 4.
  • additives such as an anti-oxidant as mentioned above, or any other additive may be added, e.g. up to 1 wt% of the gel 4.
  • BN boron nitride
  • h-BN 2D hexagonal BN
  • Figure 2 illustrates the change in viscosity over a temperature range of an oil-based gel which may be used in the composite insulation 3.
  • the gel should have a high viscosity (be in its solid form) at operating temperatures of the electrical device 1 but should also have a relatively low viscosity (be in its liquid form) at a manufacturing temperature when the insulation 3 is formed by mixing/impregnating the particulate filler with the gel.
  • This makes the gel thermo-reversible, being in a solid form below at temperatures below a transition temperature and in a liquid form at temperatures above said transition temperature, forming a knee in the viscosity curve of figure 2 .
  • the gel has a complex viscosity above 10 Pa ⁇ s (is in its solid form) below about 50°C and a complex viscosity below 0.01 Pa ⁇ s (is in its liquid form) above about 90°C.
  • the transition temperature may be within the range of 30-200°C.
  • the preferred viscosity of the gel 4 at the operating temperature of the electrical device 1, as well as the transition temperature and preferred viscosity of the gel when in liquid form (when the insulator (3) is repaired, may vary depending on the application.
  • the gel may have a viscosity in solid form, e.g. below 90°C, of at least 10 Pa ⁇ s, and a viscosity in liquid form, e.g. above 110°C, of at most 0.1 Pa ⁇ s, e.g. for an operating temperature of the electrical device of 8o°C.
  • the gel of the composite insulation 3 is based on an insulating oil, e.g. mineral oil, ester oil and/or paraffinic oil, e.g. iso-paraffinic oil.
  • the gel is formed by mixing of the oil with a polymeric thickener (e.g. thermoplastic rubber) at an elevated temperature (e.g. above about 100°C).
  • the polymeric thickener thus dissolves in the oil.
  • the gel increases its viscosity while cooling down until it has passed its transition temperature and becomes solid. The process is fully reversible. After heating up above the transition temperature, the gel returns to liquid form.
  • the viscosity and transition temperature of the gel can be adjusted by the amount and type of thickener added to the oil. The more thickener, the higher transition temperature (corresponding to the knee in figure 2 ).
  • the transition temperature can be adjusted depending on application and requirements of each particular device 1, to above or below the operating temperature of the device, typically above.
  • the composite insulation 3 comprises or consists of the oil-based gel and particulate filler (sand) which is used as an inorganic filler.
  • the gel is used as a main insulation matrix and is manufactured from the oil by addition of the thickener (belonging to the group of e.g. styrene thermoplastic elastomers, block copolymer, etc.).
  • the thickener belonging to the group of e.g. styrene thermoplastic elastomers, block copolymer, etc.
  • the thermo-reversible gel which may be in solid or liquid form, depending on temperature. In both forms, the viscosities remain relatively stable in certain temperature ranges until the change of the phase appears.
  • the solid and liquid zones are separated by the transition zone in which the viscosity of the substance significantly drops (forms a knee as in figure 2 ) and the gel undergoes the phase change.
  • the insulated part, e.g. High-Voltage (HV) transformer winding 5 of the electrical device 1 is placed in an insulating or conductive shell 6 made of polymeric material or metal.
  • the shell 6 containing the part 5 is filled with the filler in form of sand.
  • the whole arrangement filler filled shell and part is heated up over the transition temperature of the gel.
  • the heated gel in liquid form is poured into the shell containing the filler sand and the part, and the liquid gel impregnates the filler and the part and fills the shell.
  • the impregnation step might be performed under vacuum conditions. After the impregnation, the gel-filler mixture is cooled which leads to solidification of the gel and creation of solid gel-filler insulation composite 3.
  • the gel-filler composite insulation 3 insulates the active part 4 of a Medium-Voltage (MV) instrument transformer.
  • the active part of the instrument transformer was placed in a plastic tank 2, filled with the filler (here sand) and finally impregnated with the oil-based gel in liquid form at a temperature of 140°C for 5 hours. Initially impregnation was done under vacuum for 1h and later it was continued in an oven.
  • MV Medium-Voltage
  • the impregnation gel consisted of Oil (Nynas NS100TM) 99 wt%, and a thickener consisting of SEEPSTM 4099 (a tri-block copolymer consisting of polystyrene-b-poly(ethylene-ethylene/propylene)-b-polystyrene) 0.5 wt%, and SEPTM 1020 (a di-block copolymer consisting of polystyrene-b-poly(ethylene/propylene)) 0.5 wt% of the gel, both from SeptonTM.
  • SEEPSTM 4099 a tri-block copolymer consisting of polystyrene-b-poly(ethylene-ethylene/propylene)-b-polystyrene
  • SEPTM 1020 a di-block copolymer consisting of polystyrene-b-poly(ethylene/propylene)
  • the following test was performed. Two electrodes were placed in the plastic tank 2 and filled with the composite insulation 3.
  • the common transformer oil was used as insulation material instead of the composite.
  • Such prepared samples were subjected to an arc fault test.
  • performing of the test resulted in explosion leading to complete destruction of the tank 2, splashing of the oil in large radius around the experimental setup and contamination of the surrounding environment.
  • the gel-filler composite 3 sample the result was completely different.
  • the plastic tank 2 remained intact and the whole composite insulation 3 remained inside the tank. There was only visible a relatively small crater in the middle of the tank where the insulation 3 was burned.
  • composite insulator 3 of the present disclosure has numerous advantages to conventional insulation, including:
  • FIG. 3 is a schematic flow chart of an embodiment of the method of the present invention.
  • the method is for encasing an electrical power device 4 or 5 in a composite insulation 3.
  • the method comprises forming M1 an oil-based thermo-reversible gel by adding a thickener to an electrically insulating oil.
  • the method also comprises filling M2 the tank 2 or 6 comprising the electrical power device 4 or 5 with an inorganic particulate filler such that the electrical power device is surrounded by said filler.
  • the method also comprises heating M3 the formed M1 thermo-reversible gel to a temperature which is above the transition temperature of the gel, whereby the gel transitions to its liquid form.
  • the method also comprises pouring M4 the heated M3 gel into the filled M2 tank, whereby the inorganic particulate filler is impregnated with the gel in liquid form to form the composite insulation 3.
  • the method also comprises cooling M5 the thermo-reversible gel to a temperature which is below the transition temperature of the gel, whereby the gel impregnating the filler transitions to its solid form, encasing the electrical power device 4 in the solid composite insulation 3 within the tank 2.
  • the inorganic particulate filler comprises or consists of sand.
  • Sand may be preferred as filler since it is easily obtainable and relatively cheap.
  • the thickener comprises a styrenic block copolymer, e.g. a di- and/or a tri-block copolymer.
  • the gel is based on an oil selected among mineral oil, aromatic oil, ester oil and paraffinic oil, e.g. iso-paraffinic oil, or a mixture thereof.
  • the gel comprises dispersed particles of boron nitride.
  • the electrical device 1 comprises a bushing, an instrument transformer, a power transformer, a capacitors or a cable ending.
  • the electrical device 1 comprises a transformer 4, and the transformer is encased within the composite insulation 3 within a transformer tank 2.
  • the electrical device 1 comprises a transformer 4, and a primary winding 5 of the transformer is encased within the composite insulation 3 within a shell 6 enclosing the primary winding and separating the primary winding from a secondary winding 7 of the transformer.
  • the device 1 has an operating temperature of up to 8o°C, e.g. within the range of 50-80°C or 30-60°C.
  • the transition temperature is within the range of 60-110°C, e.g. within the range of 60-90°C or 80-110°C.
  • the heating M3 of the gel is to a temperature above 90°C or above 110°C, e.g. to within the range of 110-150°C.
EP18162517.9A 2018-03-19 2018-03-19 Transformator mit gel-verbundisolierung Active EP3544032B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18162517.9A EP3544032B1 (de) 2018-03-19 2018-03-19 Transformator mit gel-verbundisolierung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18162517.9A EP3544032B1 (de) 2018-03-19 2018-03-19 Transformator mit gel-verbundisolierung

Publications (2)

Publication Number Publication Date
EP3544032A1 true EP3544032A1 (de) 2019-09-25
EP3544032B1 EP3544032B1 (de) 2022-07-20

Family

ID=61691749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18162517.9A Active EP3544032B1 (de) 2018-03-19 2018-03-19 Transformator mit gel-verbundisolierung

Country Status (1)

Country Link
EP (1) EP3544032B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023274498A1 (en) * 2021-06-28 2023-01-05 Hitachi Energy Switzerland Ag Power component for insulated switch gear assembly

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736215A1 (de) * 1993-12-22 1996-10-09 Raychem Limited Kabelverbindung
WO1999033066A1 (en) * 1997-12-22 1999-07-01 Abb Ab A dielectric gelling composition, a method of manufacturing such a dielectric gelling composition and an electric dc-cable comprising an insulation system impregnated with such a dielectric gelling composition
US6383634B1 (en) * 1997-12-22 2002-05-07 Abb Ab Dielectric gelling composition, the use of such dielectric gelling composition, an insulated electric dc-cable comprising such gelling composition, and a method for manufacturing an insulated electric dc-cable comprising such gelling composition
US6391447B1 (en) * 1997-12-22 2002-05-21 Abb Ab Method for manufacturing an electric device having an insulation system impregnated with a dielectric fluid
DE10110062A1 (de) * 2001-03-02 2002-09-05 Abb Research Ltd Verfahren zur Herstellung einer elektrischen Isolation in einem Hochspannungsgerät
US20110287226A1 (en) * 2009-02-03 2011-11-24 Patrik Roseen Electrically Insulating Body
US8134089B2 (en) * 2007-10-12 2012-03-13 Abb Research Ltd. Device for electric connection, a method for producing such a device, and an electric power installation provided therewith

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736215A1 (de) * 1993-12-22 1996-10-09 Raychem Limited Kabelverbindung
WO1999033066A1 (en) * 1997-12-22 1999-07-01 Abb Ab A dielectric gelling composition, a method of manufacturing such a dielectric gelling composition and an electric dc-cable comprising an insulation system impregnated with such a dielectric gelling composition
US6383634B1 (en) * 1997-12-22 2002-05-07 Abb Ab Dielectric gelling composition, the use of such dielectric gelling composition, an insulated electric dc-cable comprising such gelling composition, and a method for manufacturing an insulated electric dc-cable comprising such gelling composition
US6391447B1 (en) * 1997-12-22 2002-05-21 Abb Ab Method for manufacturing an electric device having an insulation system impregnated with a dielectric fluid
DE10110062A1 (de) * 2001-03-02 2002-09-05 Abb Research Ltd Verfahren zur Herstellung einer elektrischen Isolation in einem Hochspannungsgerät
US8134089B2 (en) * 2007-10-12 2012-03-13 Abb Research Ltd. Device for electric connection, a method for producing such a device, and an electric power installation provided therewith
US20110287226A1 (en) * 2009-02-03 2011-11-24 Patrik Roseen Electrically Insulating Body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023274498A1 (en) * 2021-06-28 2023-01-05 Hitachi Energy Switzerland Ag Power component for insulated switch gear assembly

Also Published As

Publication number Publication date
EP3544032B1 (de) 2022-07-20

Similar Documents

Publication Publication Date Title
CN1158680C (zh) 变压器/电抗器
US10355470B2 (en) Cable fitting for connecting a high-voltage cable to a high-voltage component
JP4339267B2 (ja) 高耐熱電力用静止機器
CN101682239A (zh) 具有导电毡的罗贝尔绕组
EP3544032B1 (de) Transformator mit gel-verbundisolierung
CN103959400A (zh) 包括厚度受控的层压绝缘层的直流(dc)传输系统以及制造方法
US20190389126A1 (en) Producing Power Bushing Condenser Core By Additive Manufacturing
EP2465121B1 (de) Feststoffisolierung für einen flüssigkeitsgefüllten transformator und herstellungsverfahren dafür
KR101858899B1 (ko) 전력 케이블
US11145455B2 (en) Transformer and an associated method thereof
US20180068758A1 (en) Inorganic Electrical Insulation Material
JP2000090750A (ja) 含浸コンパウンド
EP3544035B1 (de) Reparatur der gel-isolierung von elektrischen vorrichtungen
EP3096442B1 (de) Dynamoelektrische maschine
WO2007010988A1 (ja) 高耐熱導線及び高耐熱電磁機器
WO1997004466A1 (en) Power cable, manufacturing method and impregnating compound
JP3803139B2 (ja) 直流油浸電力ケーブル
JP3693781B2 (ja) 直流油浸電力ケーブル
Singh et al. Advances in the field of insulating liquids used in electric power equipment and their perspectives-a review
JP2011216292A (ja) 直流油浸電力ケーブル
JP2005135989A (ja) 電気機器及びその製造方法
JP3970369B2 (ja) 直流油浸電力ケーブル
JP7022694B2 (ja) 送電ケーブルおよびケーブルを製造するためのプロセス
WO2022223161A1 (en) Bushing comprising a condenser body and electrical facility with bushing
JP2011216262A (ja) 直流油浸電力ケーブル

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200325

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ABB POWER GRIDS SWITZERLAND AG

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20200820

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

RIC1 Information provided on ipc code assigned before grant

Ipc: H01B 3/44 20060101ALI20211104BHEP

Ipc: H01B 3/20 20060101ALI20211104BHEP

Ipc: H01F 41/12 20060101ALI20211104BHEP

Ipc: H01F 41/00 20060101ALI20211104BHEP

Ipc: H01F 27/02 20060101ALI20211104BHEP

Ipc: H01F 27/32 20060101AFI20211104BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

INTG Intention to grant announced

Effective date: 20211220

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HITACHI ENERGY SWITZERLAND AG

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20220216

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602018038034

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1506071

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220815

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20220720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221121

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221020

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1506071

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221120

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221021

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602018038034

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230327

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20230321

Year of fee payment: 6

26N No opposition filed

Effective date: 20230421

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220720

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230319

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20230331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230319

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230319

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230331

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230319

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230319

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230331

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 602018038034

Country of ref document: DE

Owner name: HITACHI ENERGY LTD, CH

Free format text: FORMER OWNER: HITACHI ENERGY SWITZERLAND AG, BADEN, CH