EP0288040A2 - Schutzschalter - Google Patents

Schutzschalter Download PDF

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Publication number
EP0288040A2
EP0288040A2 EP88106330A EP88106330A EP0288040A2 EP 0288040 A2 EP0288040 A2 EP 0288040A2 EP 88106330 A EP88106330 A EP 88106330A EP 88106330 A EP88106330 A EP 88106330A EP 0288040 A2 EP0288040 A2 EP 0288040A2
Authority
EP
European Patent Office
Prior art keywords
arc
fixed
circuit breaker
extinguish
grids
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
EP88106330A
Other languages
English (en)
French (fr)
Other versions
EP0288040B1 (de
EP0288040A3 (en
Inventor
Fumiyuki C/O Fukuyama Seisakusho Hisatsune
Hiroshi C/O Fukuyama Seisakusho Fujii
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
Priority claimed from JP9902887A external-priority patent/JPS63264842A/ja
Priority claimed from JP9902787A external-priority patent/JPS63264841A/ja
Priority claimed from JP9902687A external-priority patent/JPS63264840A/ja
Priority claimed from JP9902987A external-priority patent/JPS63264843A/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0288040A2 publication Critical patent/EP0288040A2/de
Publication of EP0288040A3 publication Critical patent/EP0288040A3/en
Application granted granted Critical
Publication of EP0288040B1 publication Critical patent/EP0288040B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01H9/36—Metal parts
    • 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
    • H01H9/36—Metal parts
    • H01H2009/365—Metal parts using U-shaped plates

Definitions

  • the present invention relates to a circuit breaker, particularly to an improvement of arc extinguish structure.
  • FIG.1A shows structure nearby a contact and arc extinguish grids 10 of a circuit breaker of the prior art.
  • a fixed contact 4 and an arc runner 5 are fixed on a fixed arm 3.
  • the fixed arm 3 is fixed by a bolt 12 and a folded tip part 31 of the fixed arm 3 is also fixed by a bolt 12.
  • a movable contact 2 is provided on a movable arm 1. In a closing state, the movable contact 2 and fixed contact 4 are contacted.
  • FIG.1B is a plan view for showing a relation between the arc 9 and the arc extinguish grind 10.
  • the arc extinguish grid 10 is made of magnetic material and has notch 10a for introducing the arc. Because the notch 10a is formed, lines of magnetic force are deflected as shown in FIG.1B. Therefore, the arc 9 is moved in a direction shown by an arrow A. Referring not to FIG.1A, the arc is moved from 9b to 9f through 9c, 9d and 9e. Moved arc 9 is stretched, divided and extinguished as described above.
  • the conventional circuit breaker as above suffers the following problems.
  • a circuit breaker in accordance with the present invention comprises: a fixed arm, a fixed contact provided on the fixed arm, a movable arm which is provided movable by a releasing means, a movable contact which provided on the movable arm in a manner to be disconnected from the fixed contact by the releasing means, an arc-runner end of which is fixed to the fixed arm, and arc extinguished grids of magnetic material which are positioned in an upper space of the arc-runner and have their surfaces nearby perpendicular to an arc, and have insulation films thereon formed on the surface of arc-introducing parts thereof.
  • a circuit breaker in accordance with the present invention comprises: a fixed arm, a fixed contact provided on the fixed arm, a movable arm which is provided movable by a releasing means, a movable contact which is disconnected from the fixed contact by the releasing means, an arc-runner end of which is fixed to the fixed arm, and arc extinguish grids of magnetic material which are positioned upper space of the arc-runner and which surfaces are nearly perpendicular to an arc wherein insulation films are formed at rear end thereof.
  • FIG.2A shows a preferred embodiment of a circuit breaker embodying the present invention.
  • a fixed contact 4 and an arc runner 5 are fixed on a fixed arm 3.
  • the fixed arm 3 is fixed by a bolt 12, and a folded tip part 31 of the fixed arm 3 is also fixed by a bolt 12.
  • a movable contact 2 is provided on a movable arm 1.
  • Arc extinguish grids 30 are fixed to side plates 11 by caulking protrusions 50 provided at side part of the extinguish grids 30 after inserting the protrusions 50 into holes of the side plates 11.
  • the arc extinguish grid 30 is made of magnetic material and has its surface nearly perpendicular to an arc.
  • An insulation film 32 covers a front part of the extinguish grid 30.
  • the extinguish grid 30 has insulation part 32 and metallic part 34.
  • Arc-proof insulating paint such as arc-proof epoxy coating paint (Limitrack: trademark of Ryoden Kasei), or liquid ceramic, is suitable for the insulation film 32.
  • the insulation film 32 is formed by dipping the arc extinguish grids 30 and the side plates 11 into a solution of the arc-proof insulating paint.
  • the insulation film 32 covers arc introducing part 30b of arc extinguish grid 30.
  • the caulked parts 50 are also covered with the arc-proof insulating paint, the caulked parts 50 are prevented from rusting.
  • the arc extinguish grid 10 is made of magnetic material such as iron and has notch 10a for introducing the arc. Because the notch 10a is formed, lines of magnetic force are deflected (see FIG.1B). Therefore, the arc 9 is moved in the direction shown by an arrow A.
  • thermoelectrons are not emitted from the arc extinguish grid 30 since the arc-proof insulation film 32 is formed. Therefore, the arc does not stay, but is smoothly move in the metallic part 34 of arc extinguish grid 30.
  • the arc 9 touches the metallic part 34 of the arc extinguish grid 30, the arc 9 is smoothly quenched.
  • FIG.3A is a sectional view of a circuit breaker of another embodiment
  • FIG.3B is a plan view thereof.
  • the insulation films 32 are formed in such a manner that the arc extinguish grid is covered by the insulation film 32 wider at the part near the arc-­runner 5, but narrower at the portion far from the arc-­runner 5.
  • FIG.4A is a sectional view of a circuit breaker of still another embodiment which is suitable for high voltage and large current
  • FIG.4B is a plan view thereof.
  • the insulation films 32 are formed at rear ends of the arc extinguish grids 30.
  • the arc extinguish grid 10 is made of magnetic material and has notch 10a for introducing the arc. Because the notch 10a is formed, lines of magnetic force are deflected (see FIG.1B). Therefore, the arc 9 is moved in the direction shown by an arrow A. Finally, the arc 9 is moved in the rear ends of the arc extinguish grids 30. Because the rear ends of of the grids 30 are covered by the insulation film 32, shortcircuiting by an arc at the rear part as 9g in FIG.1A is prevented, and thus superior and stable breaker efficiency is obtainable.
  • FIG.5A and FIG.5B show still other modified embodiment, wherein the insulation film 32 covers limited part behind the notch 30a of the arc extinguish grid 30.
  • the insulation film 32 covers limited part behind the notch 30a of the arc extinguish grid 30.
  • arc contact time to the metallic part 34 of the arc extinguish grid 30 is longer than that in the embodiment of FIG.4A. Therefore, the cooling and quenching of arc is efficient.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
EP88106330A 1987-04-21 1988-04-20 Schutzschalter Expired - Lifetime EP0288040B1 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP9902887A JPS63264842A (ja) 1987-04-21 1987-04-21 回路しや断器
JP99028/87 1987-04-21
JP9902787A JPS63264841A (ja) 1987-04-21 1987-04-21 回路しや断器
JP99026/87 1987-04-21
JP9902687A JPS63264840A (ja) 1987-04-21 1987-04-21 回路しや断器
JP99029/87 1987-04-21
JP9902987A JPS63264843A (ja) 1987-04-21 1987-04-21 回路しや断器
JP99027/87 1987-04-21

Publications (3)

Publication Number Publication Date
EP0288040A2 true EP0288040A2 (de) 1988-10-26
EP0288040A3 EP0288040A3 (en) 1990-06-13
EP0288040B1 EP0288040B1 (de) 1994-03-02

Family

ID=27468696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106330A Expired - Lifetime EP0288040B1 (de) 1987-04-21 1988-04-20 Schutzschalter

Country Status (3)

Country Link
EP (1) EP0288040B1 (de)
KR (1) KR910001537B1 (de)
DE (1) DE3888007T2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH681933A5 (en) * 1991-03-14 1993-06-15 Secheron Sa Electrical switch with arc-quenching system - has plate of magnetic material with coupled plate of insulation having cut-away section near to arcing point
DE19803925A1 (de) * 1998-02-02 1999-08-05 Maier & Cie C Installationsschalter
CN1298002C (zh) * 2004-02-06 2007-01-31 西安交通大学 一种带产气绝缘夹层的栅片灭弧室
CN104969320A (zh) * 2012-12-04 2015-10-07 印度拿丁集团公司 电气开关装置中用于灭弧的灭弧室配置
EP3748666A4 (de) * 2018-02-01 2021-06-30 Mitsubishi Electric Corporation Schutzschalter und schutzschaltverfahren
EP3933866A1 (de) * 2020-07-01 2022-01-05 ABB Schweiz AG Schaltvorrichtung für stromverteilungsnetze
CN114284895A (zh) * 2022-01-11 2022-04-05 华科电工工程股份有限公司 具备智能语音交互控制系统的高压开关柜

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10242310A1 (de) * 2001-11-16 2003-07-10 Abb Patent Gmbh Lichtbogenlöschanordnung für ein elektrisches Schaltgerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL295859A (de) * 1962-07-27
DE2419656B2 (de) * 1974-04-24 1978-03-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Löschblechstapel, insbesondere für Leitungsschutzschalter, der auf einen Isolierstoffträger aufgeheftet ist
DE2616825C3 (de) * 1976-04-15 1981-07-02 Brown, Boveri & Cie Ag, 6800 Mannheim Leitungsschutzschalter
IT1129691B (it) * 1980-01-31 1986-06-11 Elettromeccanica Spa Cge Comp Complesso di estinzione rapida dell'arco elettrico in dispositivi di interruzione come interruttori elettrici
DE3531040C1 (de) * 1985-08-30 1987-06-04 Licentia Gmbh Loescheinrichtung fuer einen Allstrom-Leitungsschutzschalter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH681933A5 (en) * 1991-03-14 1993-06-15 Secheron Sa Electrical switch with arc-quenching system - has plate of magnetic material with coupled plate of insulation having cut-away section near to arcing point
DE19803925A1 (de) * 1998-02-02 1999-08-05 Maier & Cie C Installationsschalter
CN1298002C (zh) * 2004-02-06 2007-01-31 西安交通大学 一种带产气绝缘夹层的栅片灭弧室
CN104969320A (zh) * 2012-12-04 2015-10-07 印度拿丁集团公司 电气开关装置中用于灭弧的灭弧室配置
CN104969320B (zh) * 2012-12-04 2018-04-03 印度拿丁集团公司 电气开关装置中用于灭弧的灭弧室配置
EP3748666A4 (de) * 2018-02-01 2021-06-30 Mitsubishi Electric Corporation Schutzschalter und schutzschaltverfahren
EP3933866A1 (de) * 2020-07-01 2022-01-05 ABB Schweiz AG Schaltvorrichtung für stromverteilungsnetze
CN114284895A (zh) * 2022-01-11 2022-04-05 华科电工工程股份有限公司 具备智能语音交互控制系统的高压开关柜
CN114284895B (zh) * 2022-01-11 2024-06-07 华科电工工程股份有限公司 具备智能语音交互控制系统的高压开关柜

Also Published As

Publication number Publication date
DE3888007T2 (de) 1994-06-09
EP0288040B1 (de) 1994-03-02
DE3888007D1 (de) 1994-04-07
EP0288040A3 (en) 1990-06-13
KR880013202A (ko) 1988-11-30
KR910001537B1 (ko) 1991-03-15

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