EP4187572B1 - Gleichstrom-leistungsschalter - Google Patents

Gleichstrom-leistungsschalter

Info

Publication number
EP4187572B1
EP4187572B1 EP23151994.3A EP23151994A EP4187572B1 EP 4187572 B1 EP4187572 B1 EP 4187572B1 EP 23151994 A EP23151994 A EP 23151994A EP 4187572 B1 EP4187572 B1 EP 4187572B1
Authority
EP
European Patent Office
Prior art keywords
arc extinguishing
arc
plate
interrupting
circuit breaker
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.)
Active
Application number
EP23151994.3A
Other languages
English (en)
French (fr)
Other versions
EP4187572A1 (de
Inventor
Kohei MATSUMURA
Nobumoto TOYA
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP4187572A1 publication Critical patent/EP4187572A1/de
Application granted granted Critical
Publication of EP4187572B1 publication Critical patent/EP4187572B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/341—Barrier plates carrying electrodes

Definitions

  • the present disclosure relates to a DC circuit breaker having an interrupting portion on an arc extinguishing plate thereof.
  • a DC circuit breaker includes: a fixed element having a fixed contact; and a movable element having a movable contact that is separable from the fixed contact.
  • the DC circuit breaker performs opening between the contacts, to interrupt current. An arc generated in association with the opening is transferred from the contacts onto arc runners disposed in the vicinity of the contacts and is guided into an arc extinguishing chamber.
  • a plurality of arc extinguishing plates each formed by retaining a grid on an insulating plate are parallelly disposed at fixed intervals in the arc extinguishing chamber.
  • the arc having arrived in the arc extinguishing chamber is divided by the arc extinguishing plates, and an arc voltage equal to or higher than a power supply voltage of a DC circuit is generated, whereby fault current is limited and interrupted.
  • Patent Document 3 states that a switch unit for a DC circuit is disclosed, which includes a first switch contact, and a second switch contact, which is movable between a first position, wherein the first switch contact contacts the second switch contact, and a second position, wherein the second switch contact is separated from the first switch contact.
  • a positioning element to position an arc chute on the switch unit, the arc chute comprises a plurality of substantially parallel metal plates, the positioning element arranged to guide an arc, which is created between the first switch contact and the second switch contact, into the arc chute in an arc displacement direction in order to be extinguished.
  • At least one gas emitting element wherein at an interruption operation of the circuit breaker at its nominal current, the arc between the first switch contact and the second switch contact vaporizes a portion of the gas emitting layer.
  • a magnetic blowing mechanism and the gas production plate are also arranged between the static contact and the arc extinguish chamber; and the electric arc generated when the moving contact is separated from the static contact is guided to the arc extinguish chamber, so that the arc extinguishing efficiency is improved; and the breaking capacity is relatively high.
  • FIG. 1 and FIG. 2 are each a cross-sectional view of the DC circuit breaker 100 of the present embodiment and each show a schematic structure of the device.
  • the lower portion indicates an interruption mechanism portion 16 and the upper portion indicates the arc extinguishing chamber 14.
  • a space is present above the fixed contact 1 and the movable contact 3, and a fixed-side arc runner 10 and a movable-side arc runner 11 are disposed on the left and right sides.
  • Integrated products are disposed so as to be stacked over the fixed-side arc runner 10 and the movable-side arc runner 11.
  • Each integrated product is composed of: grids 12 which have electrical conductivity and have flat plate shapes; an insulating plate 13 on which the grids 12 are disposed and retained; and interrupting portions 30 which are each made of resin and each formed in a projecting shape in the form of a line to prevent backflow of hot gases.
  • the portion enclosed by the broken line in the arc extinguishing chamber 14 represents the arc extinguishing plate 15.
  • the grids 12 are attached to the upper surface of the insulating plate 13, and each interrupting portion 30 is further formed on the insulating plate 13 so as to originate from an edge of the arc extinguishing plate 15.
  • FIG. 1 shows a closed state, and thus, in this state, electric conduction is present between the fixed contact 1 and the movable contact 3 and no arc has occurred.
  • a flow at the time of generation of an arc will be described with reference to FIG. 2 and the like.
  • FIG. 2 shows the interruption mechanism portion 16 in an opened state.
  • a detector 8 disposed on the lower conductor 7 detects the fault current, and a latch 9 retaining the movable element 4 is released by the closing actuator 5. Consequently, the movable element 4 retaining the movable contact 3 is moved.
  • opening occurs between the fixed contact 1 and the movable contact 3 in a state where current is being applied.
  • an arc 20 is generated between the fixed contact 1 and the movable contact 3. It is noted that the stage in which the arc 20 is generated in the opened state is referred to as emergence and is, in some cases, distinguished from other stages of the arc 20.
  • the arc 20 having emerged between the contacts moves between the fixed-side arc runner 10 and the movable-side arc runner 11.
  • This stage is referred to as transference of an arc 21.
  • the arc 21 moves into the arc extinguishing chamber 14 owing to influences of: electromagnetic forces generated by currents flowing through the fixed-side arc runner 10 and the movable-side arc runner 11; and the flows of electrically conductive hot gases.
  • This stage is referred to as travel of an arc 22.
  • the arc 22 having travelled into the arc extinguishing chamber 14 arrives at intervals between the arc extinguishing plates 15.
  • the stage in which the arc is divided between the plurality of arc extinguishing plates 15 may be referred to as division of an arc 23. If the divided state is maintained, an arc voltage increases to become equal to or higher than a power supply voltage of a circuit. Consequently, limitation and interruption are performed.
  • the interrupting portions 30 are, as shown in FIG. 2 , formed on surfaces of the insulating plates 13 of the arc extinguishing plates 15 so as to originate from edges of the arc extinguishing plates 15 in order to prevent the arc 23 from flowing back from the intervals between the arc extinguishing plates 15 and prevent restrike of an arc due to hot gases.
  • FIG. 3 illustrates the arrangement and the structures of the interrupting portions 30 formed on the insulating plates 13 of the arc extinguishing plates 15. Some of the plurality of arc extinguishing plates 15 disposed in the arc extinguishing chamber 14 have been taken out and shown.
  • FIG. 4 shows the back surface structure in FIG. 3 .
  • FIG. 5 shows a modification of the structure of the arc extinguishing plate 15, in which the arrangement of a grid 12 is changed.
  • FIG. 6 shows a schematic structure of the arc extinguishing plates 15 disposed in the arc extinguishing chamber 14 and partially shows, together with the schematic structure, the fixed-side arc runner 10, the movable-side arc runner 11, and the like.
  • the interrupting portions 30 are formed on the insulating plates 13 of the arc extinguishing plates 15 in the present embodiment.
  • the arc extinguishing plate 15 is disposed such that the surface on which the interrupting portions 30 are formed faces downward as shown in FIG. 4 .
  • FIG. 3 shows that the insulating plate 13 side on which the interrupting portions 30 are formed faces upward for facilitating explanations.
  • each arc extinguishing plate 15 is composed of the grids 12 and the insulating plate 13 and has a structure in which the interrupting portions 30 are formed, no grids 12 can be viewed in FIG. 6 owing to the view angle.
  • a quadrangular opening in which the traveling arc 22 flows is formed at the center of each insulating plate 13.
  • the grids 12 are stacked so as to protrude into the opening.
  • the opening is located directly above the fixed contact 1 and the movable contact 3. That is, as shown in FIG. 2 , the arc 20 generated owing to an opening operation between the fixed contact 1 and the movable contact 3 flows into the opening owing to the flows of hot gases and electromagnetic forces of the fixed-side arc runner 10 and the movable-side arc runner 11. Then, the arc arrives at the intervals between the arc extinguishing plate 15, whereby the arc is divided by the grids 12 disposed on the arc extinguishing plates 15.
  • each interrupting portion 30 is disposed in the form of a line and has a projecting shape.
  • the interrupting portion 30 is attached to the insulating plate 13 by bringing side surfaces of the projecting-shape portion into close contact with the insulating plate 13.
  • the interrupting portion 30 is disposed substantially in a radial pattern so as to originate from an edge of the quadrangular opening formed at the center of the insulating plate 13 of each arc extinguishing plate 15 and so as to face the outer side of the insulating plate 13 and extend to an edge on the outer peripheral side of the arc extinguishing plate 15.
  • the interrupting portions 30 are preferably formed in regions in which the grids 12 are disposed on the arc extinguishing plate 15. Specifically, the interrupting portions 30 are preferably formed on the surfaces of the grids 12 stacked on the arc extinguishing plate 15 or at locations that: are present on a surface, of the arc extinguishing plate 15, that is opposite to the surface on which the grids 12 are formed; and correspond to the locations at which the grids 12 are formed.
  • each interrupting portion 30 takes the same value as the thickness of each of the grids 12 and the insulating plate 13 so as not to inflict any great influence on the stacking structure when the arc extinguishing plates 15 are disposed in the arc extinguishing chamber 14 in a mutually stacked manner.
  • each interrupting portion 30 exhibited when the divided arc 23 flows into the intervals between the arc extinguishing plates 15, will be described later. Since the interrupting portion 30 is disposed in a radial pattern so as to face the outer side of the insulating plate 13, the interrupting portion 30 is advantageous in diffusing hot gases. In addition, the interrupting portions 30 are each bent at an obtuse angle and have bent portions disposed so as to face each other. Thus, projecting portions at the bent portions make it possible to prevent backflow of hot gases. Therefore, reemergence of an arc can be prevented.
  • FIG. 4 shows the back surface structure of the arc extinguishing plates 15 shown in FIG. 3 .
  • projecting portions are formed at center portions in the longitudinal direction of the arc extinguishing plates 15 at which no grids 12 are disposed.
  • the effect of controlling the arc 23 is small in the case of using only these projecting portions.
  • the projecting portions are used in combination with the interrupting portions 30 shown in FIG. 3 , a favorable effect of controlling the arc can be expected.
  • FIG. 5 is a modification in which a grid 12 is disposed between the insulating plate 13 and interrupting portions 30. This arrangement also makes it possible to obtain the favorable effect of controlling the arc.
  • FIG. 7 shows the flows of hot gases and the arc 22 having travelled to the intervals between the arc extinguishing plates 15.
  • An effect of each interrupting portion 30 on the arc 23 divided by the arc extinguishing plates 15, will be described with reference to FIG. 7 .
  • FIG. 7 also shows, for explanations, the state in which the surface of the insulating plate 13 of each arc extinguishing plate 15 on which the interrupting portions 30 are formed faces upward.
  • the divided arc 23 spreads in all directions such that, since the shape of the insulating plate 13 of the arc extinguishing plate 15 is symmetric about the quadrangular opening at the center, the diffusion of the arc 23 also has symmetry. Considering this, description will be given with the direction being limited to one direction, for facilitating explanations.
  • the arc 20 having emerged upon the opening between the fixed contact 1 and the movable contact 3 moves and travels into the quadrangular opening portion at the center in FIG. 7 .
  • the arc 22 having travelled past the fixed-side arc runner 10 and the movable-side arc runner 11 is influenced by the flows of hot gases and the electromagnetic forces of the grids 12 of the arc extinguishing plate 15 and moves along the white arrow 32 which indicates the travel of the arc 22 in FIG. 7 . Consequently, the arc 22 turns into a divided arc 23.
  • hot gases generated by the arc 23 and having high electrical conductivity move along the surface of the arc extinguishing plate 15 and are diffused in a radial pattern, as indicated by the black arrows 31 which indicate the flows of the hot gases.
  • interrupting portions 30 which have projecting shapes in the forms of lines bent at obtuse angles and which have the bent portions facing each other are formed on the insulating plate 13 of the arc extinguishing plate 15 so as to originate from edges of the opening at the center and so as to extend to edges on the outer peripheral side of the arc extinguishing plate 15.
  • hot gases are diffused as indicated by the black arrows 31, and a hot gas passing around from a side is received by one of the bent portions, whereby the hot gas can be diffused in a radial pattern to the outer side of the arc extinguishing plate 15.
  • each interrupting portion 30 is formed on the insulating plate 13 with use of an insulating material in the present embodiment 1, it is also possible to: form an interrupting portion 30 having a linear or bent projecting shape on each grid 12 of the arc extinguishing plate 15 with use of a metal material; and bring side surfaces of the interrupting portion 30 into close contact with the grid by welding to fix the interrupting portion 30.
  • the interrupting portion 30 can be formed also by half-blanking the grid 12 through press working.
  • each arc extinguishing plate 15 composed of the insulating plate 13 and the grids 12 is disposed horizontally
  • the same advantageous effects can be obtained by forming the interrupting portions 30 on the insulating plate 13 or the grids 12 in the same manner, also in an arc extinguishing chamber 14 in which each arc extinguishing plate 15 composed of the insulating plate 13 and the grids 12 is disposed in the vertical direction as in a DC circuit breaker 101 shown in a cross-sectional view in FIG. 8 .
  • FIG. 9 shows the flows of hot gases and an arc 22 having travelled to the intervals between the arc extinguishing plates 15 disposed in the vertical direction.
  • An arc 20 having emerged upon opening between the fixed contact 1 and the movable contact 3 moves and travels into the opening portion at the center in FIG. 9 .
  • the arc 22 is influenced by the flows of hot gases and the electromagnetic forces of the grids 12 of each arc extinguishing plate 15 and moves along the white arrow 32 which indicates the travel of the arc 22 in FIG. 9 . Consequently, the arc 22 turns into a divided arc 23.
  • FIG. 10 is a perspective view of an arc extinguishing plate 15 at a lowermost stage connected to the fixed-side arc runner 10 and the movable-side arc runner 11.
  • FIG. 10 shows a state where the movable contact 3, the movable element 4, and the upper conductor 6 are disposed beneath the arc runners.
  • a region in the vicinity of each arc runner is a region in which the arc 22 travels at high speed, and thus the effect of preventing the backflow can also be notably obtained. Consequently, restrike of an arc can be prevented, and the interruption characteristic of the DC circuit breaker 100 can be improved.
  • the interrupting portions 33 are formed on the insulating plate 13, at the lowermost stage in the arc extinguishing chamber 14, which is connected to the arc runners.
  • the present disclosure is not limited thereto, and the same advantageous effects can be obtained also by forming the interrupting portions 33 on the grids 12.
  • the disposition locations for the interrupting portions 33 are not limited to such locations that the interrupting portions 33 are in contact with side surfaces of the arc runners, and only has to be locations near the arc runners.
  • the same advantageous effects are exhibited also by forming the interrupting portions 33 on the inner wall of the arc extinguishing chamber 14 retaining the fixed element 2 and the movable element 4 or on a frame portion forming a circuit breaker body.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (8)

  1. Gleichstrom-Leistungsschalter, der aufweist:
    einen Unterbrechungsmechanismusabschnitt (16), der eingerichtet ist, ein Öffnen zwischen einem festen Kontakt (1) und einem beweglichen Kontakt (3) durchzuführen, um einen Gleichstrom zu unterbrechen;
    eine Lichtbogenlöschplatte (15), die durch ein Überlagern einer Isolierplatte (13) und eines Gitters (12) erhalten wird, das eine elektrische Leitfähigkeit aufweist und das eine Plattenform aufweist; und
    eine Lichtbogenlöschkammer (14), in welcher eine Vielzahl der Lichtbogenlöschplatten (15) in einem gestapelten Zustand in festen Abständen untergebracht sind, so dass Ränder der Lichtbogenlöschplatten (15) oberhalb des festen Kontakts (1) und des beweglichen Kontakts (3) lokalisiert sind, wobei
    ein Unterbrechungsabschnitt (30), der eine vorstehende Form aufweist, auf beiden Oberflächen jeder Lichtbogenlöschplatte (15) so angeordnet ist, dass er von dem Rand der Lichtbogenlöschplatte (15) ausgeht, dadurch gekennzeichnet, dass
    der Unterbrechungsabschnitt (30) in einem radialen Muster so angeordnet ist, dass er von einem Rand einer Öffnung ausgeht, die in einer Mitte der Lichtbogenlöschplatte (15) ausgebildet ist, und sich zu einem Rand einer äußeren peripheren Seite der Lichtbogenlöschplatte (15) erstreckt.
  2. Gleichstrom-Leistungsschalter nach Anspruch 1, wobei eine Vielzahl der Unterbrechungsabschnitte (30) in einem radialen Muster zueinander angeordnet sind.
  3. Gleichstrom-Leistungsschalter nach Anspruch 2, wobei die Vielzahl der Unterbrechungsabschnitte (30) auf einer Oberfläche des Gitters (12), das auf jeder Lichtbogenlöschplatte (15) ausgebildet ist, oder auf einer gegenüberliegenden Oberfläche der Lichtbogenlöschplatte (15) angeordnet sind, die einem Bereich entspricht, in welchem das Gitter (12) ausgebildet ist.
  4. Gleichstrom-Leistungsschalter nach Anspruch 3, wobei
    ein Vorsprungsabschnitt zusätzlich zu den Unterbrechungsabschnitten (30) angeordnet ist, und
    der Vorsprungsabschnitt in einem Bereich auf der Lichtbogenlöschplatte (15) angeordnet ist, in dem das Gitter (12) nicht ausgebildet ist.
  5. Gleichstrom-Leistungsschalter nach Anspruch 2, wobei jede Lichtbogenlöschplatte (15) in der Lichtbogenlöschkammer (14) derart untergebracht ist, dass eine Oberfläche der Lichtbogenlöschplatte (15) in einer horizontalen Richtung orientiert ist.
  6. Gleichstrom-Leistungsschalter nach Anspruch 5, wobei
    die Lichtbogenlöschplatte (15) eine Öffnung in einem Mittelabschnitt davon aufweist,
    ein Rand der Lichtbogenlöschplatte (15), der die Öffnung begrenzt, oberhalb des festen Kontakts (1) und des beweglichen Kontakts (3) lokalisiert ist, und
    die Vielzahl der Unterbrechungsabschnitte (30) in einem radialen Muster so zueinander angeordnet sind, dass sie von den Rändern ausgehen.
  7. Gleichstrom-Leistungsschalter nach Anspruch 6, wobei die Vielzahl der Unterbrechungsabschnitte (30) Formen aus gebogenen Linien aufweisen und derart angeordnet sind, dass gebogene Abschnitte davon einander zugewandt sind.
  8. Gleichstrom-Leistungsschalter nach Anspruch 2, wobei jede Lichtbogenlöschplatte (15) in der Lichtbogenlöschkammer (14) derart untergebracht ist, dass eine Oberfläche der Lichtbogenlöschplatte (15) in einer vertikalen Richtung orientiert ist.
EP23151994.3A 2019-05-28 2020-05-20 Gleichstrom-leistungsschalter Active EP4187572B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2019099017 2019-05-28
EP20813702.6A EP3979292B1 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter
PCT/JP2020/019864 WO2020241397A1 (ja) 2019-05-28 2020-05-20 直流遮断器

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP20813702.6A Division-Into EP3979292B1 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter
EP20813702.6A Division EP3979292B1 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter

Publications (2)

Publication Number Publication Date
EP4187572A1 EP4187572A1 (de) 2023-05-31
EP4187572B1 true EP4187572B1 (de) 2025-09-24

Family

ID=73552206

Family Applications (2)

Application Number Title Priority Date Filing Date
EP23151994.3A Active EP4187572B1 (de) 2019-05-28 2020-05-20 Gleichstrom-leistungsschalter
EP20813702.6A Active EP3979292B1 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20813702.6A Active EP3979292B1 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter

Country Status (3)

Country Link
EP (2) EP4187572B1 (de)
JP (1) JP6890732B2 (de)
WO (1) WO2020241397A1 (de)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
CN114695011B (zh) * 2020-12-30 2025-08-15 上海量乘机电科技有限公司 一种电器开关的触头灭弧系统
CN114360979A (zh) * 2021-12-17 2022-04-15 北京中车赛德铁道电气科技有限公司 一种灭弧栅结构
FR3131798B1 (fr) * 2022-01-10 2024-08-02 Alstom Holdings Plaque de cheminée de fragmentation et d’extinction d’arc et cheminée la comportant
US20250104952A1 (en) * 2022-01-13 2025-03-27 Ls Electric Co., Ltd. Arc extinguishing unit of molded case circuit breaker
KR102804378B1 (ko) * 2022-05-17 2025-05-09 에이치디현대일렉트릭 주식회사 차단기
WO2025104835A1 (ja) 2023-11-15 2025-05-22 三菱電機株式会社 気中回路遮断器
CN120089566B (zh) * 2025-05-07 2025-10-17 比亚迪股份有限公司 断路器、驱动系统及其控制方法

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SU773788A1 (ru) * 1978-04-28 1980-10-23 Институт высоких температур АН СССР Плавкий предохранитель
JPS56162579A (en) * 1980-05-19 1981-12-14 Sanyo Electric Co Ltd Magnetic video recording and reproducing method
JPS6282616A (ja) 1985-10-08 1987-04-16 寺崎電気産業株式会社 消弧装置
JPS61190828A (ja) 1986-02-03 1986-08-25 株式会社日立製作所 回路しや断器
JPS63108623A (ja) * 1986-06-03 1988-05-13 三菱電機株式会社 開閉器
JPS63257138A (ja) * 1987-04-13 1988-10-25 三菱電機株式会社 回路しや断器の消弧装置
JP3263969B2 (ja) * 1992-04-10 2002-03-11 株式会社明電舎 直流高速度遮断器
JP4231642B2 (ja) * 2001-11-29 2009-03-04 エナジーサポート株式会社 消弧装置
JP5559419B2 (ja) * 2010-04-16 2014-07-23 アーベーベー・テヒノロギー・アーゲー スイッチ・ユニット、スイッチ・ユニットを組み立てるための方法、及び中電圧回路のためのサーキット・ブレーカ
JP6160106B2 (ja) * 2013-02-13 2017-07-12 富士電機機器制御株式会社 回路遮断器
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WO2019150613A1 (ja) * 2018-02-01 2019-08-08 三菱電機株式会社 回路遮断器及び回路遮断方法

Also Published As

Publication number Publication date
EP3979292A1 (de) 2022-04-06
WO2020241397A1 (ja) 2020-12-03
EP3979292B1 (de) 2025-02-19
EP4187572A1 (de) 2023-05-31
JPWO2020241397A1 (ja) 2021-09-13
EP3979292A4 (de) 2022-10-19
JP6890732B2 (ja) 2021-06-18

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