EP0817224B1 - Unterbrechungsvorrichtung für hochkalibrigen Lastschalter - Google Patents

Unterbrechungsvorrichtung für hochkalibrigen Lastschalter Download PDF

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Publication number
EP0817224B1
EP0817224B1 EP19970410070 EP97410070A EP0817224B1 EP 0817224 B1 EP0817224 B1 EP 0817224B1 EP 19970410070 EP19970410070 EP 19970410070 EP 97410070 A EP97410070 A EP 97410070A EP 0817224 B1 EP0817224 B1 EP 0817224B1
Authority
EP
European Patent Office
Prior art keywords
compartment
arc
breaking device
extinguishing chamber
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.)
Expired - Lifetime
Application number
EP19970410070
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English (en)
French (fr)
Other versions
EP0817224A1 (de
Inventor
Alain Menier
Jean-Yves Amblard
Michel Perrot
Lionel Caillat
Jean-Claude Ramirez
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0817224A1 publication Critical patent/EP0817224A1/de
Application granted granted Critical
Publication of EP0817224B1 publication Critical patent/EP0817224B1/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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • 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
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a breaking device for an electrical circuit breaker with a housing molded and heavy gauge, according to the preamble of claim 1.
  • the extinguishing chamber arc is placed directly in the plastic case of the circuit breaker, and the arc formation consists of a pair of guide cheeks made of insulating material, positioned parallel to the large side faces of the housing, and extending from the contact separation zone, up to the deionization plates of the chamber extinction.
  • the arc formation consists of a pair of guide cheeks made of insulating material, positioned parallel to the large side faces of the housing, and extending from the contact separation zone, up to the deionization plates of the chamber extinction.
  • the performance of such circuit breakers presents cut-off limits if the dimensions of the box must be preserved.
  • Document FR-A- 2682531 mentions a low-power multipole industrial circuit breaker voltage making use of cut-off bulbs at the different poles.
  • Each bulb is formed by a box containing two extinguishing chambers, and a bridge double break rotary contact mounted floating on a section of rotary bar extending to the center of the box.
  • the breaking performance are obtained by putting two arcs in series, and using an energy mechanism important.
  • Document US-A-3632926 relates to a circuit breaker according to the preamble of claim 1, including the formation chamber arc is shaped according to a nozzle having a throttle neck in the part median.
  • the object of the invention is to provide a cut-out device for a circuit breaker strong calibers, and with reduced overall dimensions, having high cutting performance.
  • the breaking device is characterized in that the two shells of the bulb are attached to each other to delimit an internal space subdivided into three compartments distributed on different levels for an increase progressive sections of arc passage towards the extinguishing chamber, the first compartment in the vicinity of the contacts being arranged at the first level, in causing a rolling effect of the arc drawn at the start of the opening stroke of the movable contact to favor the switching of the arc on the guide horns extending into the second compartment, which is on a second level in having a width greater than that of the first compartment, and that the arc extinguishing chamber is arranged in the third compartment having a width greater than that of the second compartment.
  • the end faces of the shells delimiting the first compartment each have an extension located on the first level, and protruding into the second compartment so as to form a baffle extending transversely between the guide horns.
  • a first series of compression holes is arranged in each shell in the vicinity of the separation notch of the second compartment and the third compartment to create a depression at the entrance to the extinguishing chamber.
  • Fresh gas is drawn in from outside the bulb when the bow is in the second compartment.
  • the use of a cut-off bulb requires that the third compartment has a gas exhaust port to the housing volume of the mechanism.
  • the hole exhaust is located at the top of the extinguishing chamber, and at the near the end of the upper bow horn.
  • the third compartment is provided with a second series of holes communicating with a drainage channel provided at the rear of the extinguishing chamber, and being in connection with said exhaust orifice.
  • the loop effect is also reinforced thanks to an insulating screen intended to cover the portion of the conductor located opposite the movable contact arm, and extending to the vicinity of the fixed contact.
  • the displacement of the arc at the start of the opening stroke can be accelerated by the use of ferromagnetic elements arranged on the external walls of the bulb.
  • a cut-off device 10 of a heavy-duty electric circuit breaker includes a contact arm 12 mounted at pivoting on an axis 14 between a closed position and a position opening.
  • the contact arm 12 is coupled to a control mechanism (not shown), and extends inside an air gap formed in an actuator electromagnetic (not shown), as described in document EP-A 635 859 of the plaintiff.
  • the contact arm 12 carries opposite the axis 14 a contact piece, called by the following mobile contact 17, which cooperates in the closed position with a fixed contact 18.
  • the two separable contacts 17, 18 are arranged inside a bulb 20 of break also containing an arc extinguishing chamber 22 formed by a stacking of deionization sheets of the electric arc.
  • the electromagnetic actuator is positioned in an orifice 16 of the bulb 20.
  • the fixed contact 18 is carried by a loop-shaped conductor 24, crossing the magnetic circuit of the actuator 16, and connected to a pad 26 in connection with a connection terminal (not shown).
  • a conductor extension 24 downstream of the fixed contact 18 is shaped according to an upper arc horn 28 framing the entrance to the arc extinguishing chamber 22 in cooperation with the arc horn lower 30.
  • the movable contact arm 12 is connected by a braid to the other terminal connection (not shown) possibly via a bimetallic strip a thermal release.
  • the cut-off bulb 20 of each pole is described in detail with reference to the figures 3 to 7, and is composed of a box with two shells 20A, 20B made of plastic material molded, housed inside the circuit breaker box.
  • the two shells 20A, 20B are joined together to confine an internal space 32, which is subdivided into several compartments 34, 36, 38 stepped on three levels A, B, C.
  • the first compartment 34 is located in the vicinity of the contacts 17, 18 and has a very narrow width L1 containment zone, delimited between the end faces 35.37 of shells 20A, 20B.
  • the second intermediate compartment 36 has a smaller containment zone of width L2 greater than that L1 of the first compartment 34, but less than the width L3 of the third compartment 38 enclosing the arc extinguishing chamber 22.
  • the cross section is maximum in the third compartment 38, the width L3 corresponding substantially to the width of the deionization plates, which extend parallel to the bottom of chamber 22 and to the terminal portion of the lower arc horn 30.
  • each end face 35.37 is provided a extension 40A, 40B which extends into the middle zone of the second compartment 36 by forming at least one baffle whose depth corresponds to the difference of levels A and B.
  • Each extension 40A, 40B comprises on the outside of the shell 20A, 20B, a groove 42A, 42B intended to receive an element ferromagnetic integral with the cylinder head of the actuator.
  • a first series of decompression holes 44 is provided in each shell 20A, 20B, extending to the entrance to the third compartment 38 between the horns arc 28.30.
  • the notch 46 for separation between the second compartment 36 and the third compartment 38 of each shell 20A, 20B comprises a bevelled surface 48 so as to constitute a divergent intended for accelerate the speed of movement of the arc towards the extinguishing chamber 22.
  • a second series of holes 50 communicates with a channel provided at the rear of the extinguishing chamber 22 in the third compartment 38.
  • a groove 52A, 52B lateral decompression is located in each shell 20A, 20B at the level of the middle zone of the extinguishing chamber 22.
  • the insulating bulb 20 is equipped in addition with another orifice 54 for exhausting the gas to the housing volume of the mechanism.
  • Port 54 is located at the upper third compartment 38, and near the end of the horn upper arc 28. It is in communication with the discharge channel 51.
  • the shell 20A is provided with an insulating screen 56 intended to cover the portion of the conductor 24 located opposite the movable contact arm 12, and extending to vicinity of the fixed contact 18.
  • the presence of the screen 56 re-establishes a loop effect, and promotes switching of the arc on the guide horns 28, 30.
  • the migration of arc roots to the second compartment 36 of level B is fast, while the central part of the arch remains laminated by the presence of extensions 40 located at level A.
  • the displacement of the arc towards the level C of the extinguishing chamber 22 can also be accelerated by means magnetic becoming active following the loop effect reinforced by the screen 56, and the presence of ferromagnetic cheeks of shells 20A, 20B, and elements ferromagnetic inserted in the grooves 42A, 42B.
  • the arrangement of the first series of holes 44 also creates a depression at the entrance to the third compartment 38, allowing fresh gas to be drawn in depending on the position of the arc.
  • the arrangement of the bulb causes at all times an overpressure upstream of the arc, and a depression downstream of the arc, so as to favor rapid movement towards the extinguishing chamber.
  • the arc moves along the horns 28.30, and is propelled on the deionization plates from the extinguishing chamber 22, where it cools quickly and turns off.
  • the recycling gases are effected through the lateral grooves 52A, 52B.
  • the evacuation of gases from cut-off takes place through the exhaust port 54 towards the internal volume of the mechanism (arrow F1 in FIG. 2C), and downwards (arrow F2) coming from channel 51.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (10)

  1. Abschaltvorrichtung eines für hohe Nennströme ausgelegten Leistungsschalters mit Isolierstoffgehäuse, die
    eine einpolige Schaltkammer (20), welche durch einen Kasten aus zwei aufeinandergelegten, als Kunststoff-Formteile ausgebildeten Halbschalen (20A, 20B) gebildet wird, im Schaltergehäuse angeordnet ist und einen Innenraum (32) umschließt,
    einen feststehenden Kontakt (18), der mit einem beweglichen Kontakt (17) zusammenwirkt, um bei einer fehlerbedingten Abschaltung des Leistungsschalters im Innern der Schaltkammer (20) einen Lichtbogen zu erzeugen,
    sowie eine Lichtbogenlöschkammer (22) umfaßt, die im Innern der Schaltkammer (20) angeordnet ist und von zwei Lichtbogenführungshörnern (28, 30) umfaßt wird,
    dadurch gekennzeichnet, daß der genannte Innenraum in drei Abteile (34, 36, 38) auf unterschiedlichen Niveaus (A, B, C) und mit jeweils zunehmendem Querschnitt zur Ausbreitung des Lichtbogens in Richtung der Löschkammer (22) unterteilt ist, wobei das in der Nähe der Kontakte (17, 18) angeordnete erste Abteil (34) auf dem ersten Niveau (A) liegt und eine Einschnürung des Lichtbogens zu Beginn des Ausschalthubs des beweglichen Kontakts (17) bewirkt, um so ein Umspringen des Lichtbogens auf die Führungshörner (28, 30) zu begünstigen, die in das zweite Abteil (36) hineinragen, welches auf dem zweiten Niveau (B) liegt und eine Breite (L2) aufweist, die größer ist als die Breite (L1) des erstes Abteils (34), und daß die Lichtbogenlöschkammer (22) im dritten Abteil (38) angeordnet ist und eine Breite (L3) aufweist, die größer ist als die Breite (L2) des zweiten Abteils (36).
  2. Abschaltvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die das erste Abteil (34) begrenzenden Endwände (35, 37) der Halbschalen (20A, 20B) jeweils einen Fortsatz (40A, 40B) auf dem ersten Niveau (A) aufweisen, der in das zweite Abteil (36) hineinragt und dabei eine Schikane bildet, die quer zwischen den Lichtbogenführungshörnern (28, 30) verläuft.
  3. Abschaltvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, ,daß in jeder Halbschale (20A, 20B) im Bereich des Absatzes (46) zwischen dem zweiten Abteil (36) und dem dritten Abteil (38) eine erste Reihe von Dekompressionsöffnungen (44) ausgebildet ist.
  4. Abschaltvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Absatz (46) jeder Halbschale (20A, 20B) eine schräge Fläche (48) aufweist, so daß vor der ersten Reihe von Öffnungen (44) ein sich öffnender Trichter gebildet wird.
  5. Abschaltvorrichtung nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß das dritte Abteil (38) eine Auslaßöffnung (54) zur Ableitung der Gase in den Einbauraum des Schaltmechanismus' aufweist.
  6. Abschaltvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Auslaßöffnung (54) an der Oberseite der Löschkammer (22) und in der Nähe des Endes des oberen Lichtbogenhorns (28) ausgebildet ist.
  7. Abschaltvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das dritte Abteil (38) eine zweite Reihe von Dekompressionsöffnungen (50) aufweist, die mit einem an der Rückseite der Löschkammer (22) ausgebildeten und mit der genannten Auslaßöffnung (54) verbundenen Abluftkanal (51) kommunizieren.
  8. Abschaltvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der feststehende Kontakt (18) von einem schleifenförmigen Leiter (24) getragen wird, der in das obere Lichtbogenführungshorn (28) übergeht, und daß eine der Halbschalen (20A) eine Isolierstofftrennwand (56) aufweist, die sich bis in die Nähe des feststehenden Kontakts (18) erstreckt und dazu dient, den Abschnitt des Leiters (24) abzudecken, der dem beweglichen Kontaktarm (12) gegenüberliegt.
  9. Abschaltvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß in jedem Fortsatz (40A, 40B) an der Außenseite der jeweiligen Halbschale (20A, 20B) eine Nut (42A, 42B) ausgebildet ist, in die ein ferromagnetisches Element, insbesondere ein dem beweglichen Kontaktarm (12) zugeordnetes elektromagnetisches Betätigungsglied eingesetzt werden kann.
  10. Abschaltvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Leitwandungen aus ferromagnetischem Material auf der Außenseite der Schaltkammer (20), an den Endwänden (35, 37) der Halbschalen (20A, 20B) angeordnet werden können.
EP19970410070 1996-07-05 1997-07-03 Unterbrechungsvorrichtung für hochkalibrigen Lastschalter Expired - Lifetime EP0817224B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9608638 1996-07-05
FR9608638A FR2750795B1 (fr) 1996-07-05 1996-07-05 Dispositif de coupure pour un disjoncteur electrique a forts calibres

Publications (2)

Publication Number Publication Date
EP0817224A1 EP0817224A1 (de) 1998-01-07
EP0817224B1 true EP0817224B1 (de) 2002-04-03

Family

ID=9493920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970410070 Expired - Lifetime EP0817224B1 (de) 1996-07-05 1997-07-03 Unterbrechungsvorrichtung für hochkalibrigen Lastschalter

Country Status (6)

Country Link
EP (1) EP0817224B1 (de)
CN (1) CN1067487C (de)
DE (1) DE69711504T2 (de)
EA (1) EA000195B1 (de)
ES (1) ES2175313T3 (de)
FR (1) FR2750795B1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1191560A1 (de) * 2000-09-25 2002-03-27 Hager Electro S.A. Gasblasvorrichtung für Lichtbogen in einem modularen elektrischen Gerät
JP4637722B2 (ja) * 2005-11-08 2011-02-23 三菱電機株式会社 回路遮断器
CZ200671A3 (cs) * 2006-02-01 2007-10-31 Oez, S. R. O. Elektroizolacní kryt nosice pohyblivého kontaktu elektrického prístroje, zvlášte u výkonového jistice
CN100446151C (zh) * 2006-09-06 2008-12-24 大全集团有限公司 模块式电流断路器
KR101539832B1 (ko) * 2009-09-18 2015-07-27 슈나이더 일렉트릭 인더스트리스 에스에이에스 회전 접촉 브리지를 포함하는 단극 컷 오프 유닛, 이러한 유닛을 포함하는 컷 오프 장치, 및 이러한 장치를 포함하는 회로 차단기
BR112012006182B1 (pt) * 2009-09-18 2019-10-22 Schneider Electric Ind Sas dispositivo de corte tendo pelo menos um bloco de corte unipolar, comportando uma ponte de contatos e disjuntor, comportando esse dispositivo
CN101894715B (zh) * 2010-07-08 2012-06-13 江苏辉能电气有限公司 一种低压断路器的灭弧室
CN101986415B (zh) * 2010-11-11 2012-12-26 江苏辉能电气有限公司 一种塑壳低压断路器的灭弧室
DE102012214826A1 (de) 2012-08-21 2014-02-27 Siemens Aktiengesellschaft Schaltvorrichtung
CN103021706B (zh) * 2012-12-28 2015-06-17 常熟开关制造有限公司(原常熟开关厂） 具有电弧隔离套的电开关装置
DE102015217704A1 (de) * 2015-09-16 2017-03-16 Siemens Aktiengesellschaft Lichtbogen-Löschvorrichtung und Schutzschaltgerät
CN109616390B (zh) * 2018-12-28 2021-10-26 天津京人电器有限公司 一种多极开关
CN116230466A (zh) * 2023-04-07 2023-06-06 浙江人民电器有限公司 一种大电流高分断插入式断路器

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US3632926A (en) * 1970-04-20 1972-01-04 Gen Electric Current-limiting circuit breaker having arc extinguishing means which includes improved arc initiation and extinguishing chamber construction
DE2716619C2 (de) * 1977-04-15 1979-05-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Strombegrenzender Leitungsschutzschalter mit Maßnahmen zur Erhöhung der Laufgeschwindigkeit des Schaltlichtbogeits
FR2517465B1 (fr) * 1981-11-27 1986-05-02 Merlin Gerin Disjoncteur miniature a deux chambres de coupure accolees
JPS58169732A (ja) * 1982-03-31 1983-10-06 松下電工株式会社 回路遮断器
DE3311052A1 (de) * 1983-03-25 1984-09-27 Siemens AG, 1000 Berlin und 8000 München Selbstschalter, insbesondere leitungsschutzschalter
DE3443122A1 (de) * 1984-11-27 1986-05-28 Brown, Boveri & Cie Ag, 6800 Mannheim Vorrichtung zur unterbrechung von stromkreisen
DE3619241C2 (de) * 1986-06-07 1994-07-21 Kloeckner Moeller Gmbh Löscheinrichtung für einen Leitungsschutzschalter
SU1767570A1 (ru) * 1990-08-06 1992-10-07 Всесоюзный научно-исследовательский, проектно-конструкторский и технологический институт низковольтного аппаратостроения Автоматический выключатель

Also Published As

Publication number Publication date
DE69711504T2 (de) 2002-09-26
CN1067487C (zh) 2001-06-20
ES2175313T3 (es) 2002-11-16
EA000195B1 (ru) 1998-12-24
EP0817224A1 (de) 1998-01-07
EA199700072A1 (ru) 1998-02-26
DE69711504D1 (de) 2002-05-08
FR2750795B1 (fr) 1998-09-25
CN1174391A (zh) 1998-02-25
FR2750795A1 (fr) 1998-01-09

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