EP4187572A1 - Gleichstrom-leistungsschalter - Google Patents

Gleichstrom-leistungsschalter Download PDF

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Publication number
EP4187572A1
EP4187572A1 EP23151994.3A EP23151994A EP4187572A1 EP 4187572 A1 EP4187572 A1 EP 4187572A1 EP 23151994 A EP23151994 A EP 23151994A EP 4187572 A1 EP4187572 A1 EP 4187572A1
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.)
Pending
Application number
EP23151994.3A
Other languages
English (en)
French (fr)
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
Pending legal-status Critical Current

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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
    • H01H33/02—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.s
  • 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.
  • an arc having arrived on an arc extinguishing plate in the arc extinguishing chamber may flow back in directions toward the contacts during the limitation and the interruption, to cause restrike of an arc. This results in elongation of the time taken to complete interruption and sometimes also leads to failure of interruption.
  • Patent Document 1 and Patent Document 2 an interrupting portion is provided between contacts and arc extinguishing plates in an arc extinguishing chamber. Consequently, hot gases generated by an arc having arrived in the arc extinguishing chamber are prevented from flowing back in directions toward the contacts. Thus, restrike of an arc in the vicinity of the contacts is inhibited.
  • Patent Document 1 and Patent Document 2 have the following problem. That is, control of the flowing direction of an arc which has arrived on, and divided by, an arc extinguishing plate, is not sufficient, and thus backflow of the arc sometimes occurs, to cause failure of interruption.
  • the present disclosure has been made to solve the above problem, and an object of the present disclosure is to obtain a DC circuit breaker in which an interrupting portion for controlling the flow of an arc is provided on each of arc extinguishing plates in an arc extinguishing chamber, and which has so high interruption performance that no arc flows back from a location on a grid.
  • a DC circuit breaker is a DC circuit breaker including: an interruption mechanism portion configured to perform opening between a fixed contact and a movable contact, to interrupt DC current; an arc extinguishing plate obtained by superposing an insulating plate and a grid which has electrical conductivity and has a plate shape; and an arc extinguishing chamber in which a plurality of the arc extinguishing plates are accommodated in a stacked state at fixed intervals such that edges of the arc extinguishing plates are located above the fixed contact and the movable contact, wherein an interrupting portion having a projecting shape is disposed on either surface of each arc extinguishing plate so as to originate from an edge of the arc extinguishing plate.
  • the interrupting portion is provided on each of the arc extinguishing plates.
  • the interrupting portion is provided on each of the arc extinguishing plates.
  • FIG. 1 and FIG. 2 are each a schematic cross-sectional view showing the schematic structure of a DC circuit breaker 100 of the present embodiment.
  • FIG. 1 shows a closed state between contacts
  • FIG. 2 shows an opened state between the contacts.
  • FIG. 3 is a perspective view showing several ones taken out from among arc extinguishing plates 15 disposed in an arc extinguishing chamber 14 of the DC circuit breaker 100.
  • FIG. 3 shows a state where interrupting portions 30 are formed on the arc extinguishing plates 15 which are each formed by an insulating plate 13 and grids 12.
  • FIG. 4 shows the back surface structure in FIG. 3 .
  • FIG. 5 shows a modification of the arrangement of a grid 12.
  • FIG. 6 shows the internal structure of the arc extinguishing chamber 14.
  • FIG. 6 shows a structure in which the arc extinguishing plates 15 which are each formed by the insulating plate 13 and the grids 12 and on which the interrupting portions 30 are formed, are stacked.
  • FIG. 7 shows the flows, of hot gases, that are controlled by the interrupting portions 30.
  • 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.
  • FIG. 1 shows the interruption mechanism portion 16 in a closed state between the contacts.
  • a movable element 4 is pressed by a closing actuator 5 in the leftward direction in FIG. 1 , and a movable contact 3 attached to the movable element 4 is in contact with a fixed contact 1 attached to a fixed element 2.
  • This enables electric conduction between an upper conductor 6 and a lower conductor 7.
  • 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.
  • each member disposed in the arc extinguishing chamber 14 and composed of the grids 12 and the insulating plate 13 is referred to as an arc extinguishing plate 15.
  • each portion disposed on the arc extinguishing plate 15 and having a projecting shape in the form of a line is referred to as an interrupting portion 30.
  • 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.
  • the interrupting portion 30 on the insulating plate 13 can be formed integrally with the insulating plate 13. Alternatively, the interrupting portion 30 can be formed as a separate member and attached on the insulating plate 13.
  • the order of stacking of the interrupting portion 30, and the insulating plate 13 and the grids 12 which compose the arc extinguishing plate 15, is merely an example, and it is also possible to change the order of the insulating plate 13 and the grids 12 as described later.
  • the interrupting portions 30 are formed on the insulating plate 13 in the present embodiment, the interrupting portions 30 can be formed on the grids 12.
  • 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. Further, 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.
  • interrupting portions 30 are disposed so as to originate from regions in which the grids 12 protrude into the quadrangular opening in the arc extinguishing plate 15 shown in FIG. 3 , an effect of controlling arcs can be improved.
  • 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 having a bent shape is formed on the lower surface of the insulating plate 13 with use of the same resin material as that of the insulating plate 13.
  • the present disclosure is not limited thereto. The same advantageous effects can be obtained also by making an interrupting portion 30 having a linear or bent projecting shape with use of a different insulating material and attaching the interrupting portion 30 to the insulating plate 13 by pasting or screwing.
  • 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.
  • hot gases generated by the arc 23 and having high electrical conductivity can be moved along the surface of the arc extinguishing plate 15 and diffused in a radial pattern, as indicated by the black arrows 31 which indicate the flows of the hot gases.
  • each interrupting portion 30 having the bent portions disposed so as to face each other have been used.
  • an example has been shown in which four interrupting portions 30 originating from edges of the opening at the center and extending to edges on the outer peripheral side are used on one arc extinguishing plate 15.
  • the shape of each interrupting portion 30 is not limited to a bent shape and a projecting shape in the form of a line.
  • a cylindrical shape, a prismatic shape, or the like having proportions that greatly differ in the longitudinal direction and the lateral direction may be employed, and the interrupting portion 30 does not necessarily have to be so long as to extend to an edge on an outer peripheral side. Furthermore, the number of the interrupting portions 30 is also not limited to four and only has to be one or more.
  • the present embodiment is basically the same as embodiment 1 in that each interrupting portion 30 is formed so as to originate from an edge of the opening at the center. Meanwhile, the present embodiment is characterized in that interrupting portions 33 are formed so as to be in contact with side surfaces of the fixed-side arc runner 10 and the movable-side arc runner 11.
  • 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.
  • the fixed-side arc runner 10 and the movable-side arc runner 11 are fixed to a surface of the arc extinguishing plate 15 such that a part of each arc runner protrudes to the said surface.
  • the interrupting portions 33 having bent shapes are disposed in a radial pattern on the surface of the insulating plate 13 such that end portions of the interrupting portions 33 are connected to the protruding portions of the arc runners.
  • An arc 20 having emerged upon opening between the movable contact 3 and the fixed contact (not shown) is transferred between the arc runners, and an arc 22 having travelled to a location on the arc extinguishing plate 15 at the lowermost stage shown in FIG. 10 moves in a direction toward the outer periphery owing to the flows of hot gases and electromagnetic force of each grid 12 in the same manner as in FIG. 7 . Consequently, the arc 22 turns into a divided arc 23. Further, the arc 23 generates hot gas having high electrical conductivity which is prevented by the interrupting portion 33 from flowing back, to be diffused in a radial pattern in the direction toward the periphery of the insulating plate 13 of the arc extinguishing plate 15.
  • 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.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
EP23151994.3A 2019-05-28 2020-05-20 Gleichstrom-leistungsschalter Pending EP4187572A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2019099017 2019-05-28
EP20813702.6A EP3979292A4 (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 (1)

Application Number Title Priority Date Filing Date
EP20813702.6A Division EP3979292A4 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter

Publications (1)

Publication Number Publication Date
EP4187572A1 true EP4187572A1 (de) 2023-05-31

Family

ID=73552206

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20813702.6A Pending EP3979292A4 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter
EP23151994.3A Pending EP4187572A1 (de) 2019-05-28 2020-05-20 Gleichstrom-leistungsschalter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20813702.6A Pending EP3979292A4 (de) 2019-05-28 2020-05-20 Gleichstromschutzschalter

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EP (2) EP3979292A4 (de)
JP (1) JP6890732B2 (de)
WO (1) WO2020241397A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR3131798A1 (fr) * 2022-01-10 2023-07-14 Alstom Holdings Plaque de cheminée de fragmentation et d’extinction d’arc et cheminée la comportant
WO2023136528A1 (ko) * 2022-01-13 2023-07-20 엘에스일렉트릭 (주) 배선용 차단기의 아크 소호부

Citations (7)

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Publication number Priority date Publication date Assignee Title
GB2020113A (en) * 1978-04-28 1979-11-07 Inst Vysokikh Temperatur Akade Electromagnetic arc extinction apparatus for switchgear or fusegear
JPS61190828A (ja) 1986-02-03 1986-08-25 株式会社日立製作所 回路しや断器
JPS6282616A (ja) 1985-10-08 1987-04-16 寺崎電気産業株式会社 消弧装置
JPH05290682A (ja) * 1992-04-10 1993-11-05 Meidensha Corp 直流高速度遮断器
US20130037520A1 (en) * 2010-04-16 2013-02-14 Abb Technology Ag Switch unit, method for assembling a switch unit, and circuit breaker for a medium voltage circuit
CN105470067A (zh) * 2015-12-29 2016-04-06 浙江天正电气股份有限公司 一种设有具备磁吹和气吹功能的灭弧机构的断路器
JP6516078B1 (ja) * 2018-02-01 2019-05-22 三菱電機株式会社 回路遮断器及び回路遮断方法

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Publication number Priority date Publication date Assignee Title
JPS56162579A (en) * 1980-05-19 1981-12-14 Sanyo Electric Co Ltd Magnetic video recording and reproducing method
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
JP4231642B2 (ja) * 2001-11-29 2009-03-04 エナジーサポート株式会社 消弧装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2020113A (en) * 1978-04-28 1979-11-07 Inst Vysokikh Temperatur Akade Electromagnetic arc extinction apparatus for switchgear or fusegear
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
JPH05290682A (ja) * 1992-04-10 1993-11-05 Meidensha Corp 直流高速度遮断器
US20130037520A1 (en) * 2010-04-16 2013-02-14 Abb Technology Ag Switch unit, method for assembling a switch unit, and circuit breaker for a medium voltage circuit
CN105470067A (zh) * 2015-12-29 2016-04-06 浙江天正电气股份有限公司 一种设有具备磁吹和气吹功能的灭弧机构的断路器
JP6516078B1 (ja) * 2018-02-01 2019-05-22 三菱電機株式会社 回路遮断器及び回路遮断方法

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JPWO2020241397A1 (ja) 2021-09-13
WO2020241397A1 (ja) 2020-12-03
EP3979292A4 (de) 2022-10-19
JP6890732B2 (ja) 2021-06-18
EP3979292A1 (de) 2022-04-06

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