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EP0619592B1 - Elektrischer Schutzschalter mit elektrodynamischer Kontaktabstossung und mit Doppellöschkammern - Google Patents

Elektrischer Schutzschalter mit elektrodynamischer Kontaktabstossung und mit Doppellöschkammern Download PDF

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Publication number
EP0619592B1
EP0619592B1 EP19940420093 EP94420093A EP0619592B1 EP 0619592 B1 EP0619592 B1 EP 0619592B1 EP 19940420093 EP19940420093 EP 19940420093 EP 94420093 A EP94420093 A EP 94420093A EP 0619592 B1 EP0619592 B1 EP 0619592B1
Authority
EP
European Patent Office
Prior art keywords
arc extinguishing
circuit breaker
extinguishing chambers
end plate
movable contact
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
EP19940420093
Other languages
English (en)
French (fr)
Other versions
EP0619592A1 (de
Inventor
Jean-Luc Payet-Burin
Pierre Batteux
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 SE
Original Assignee
Schneider Electric SE
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 SE filed Critical Schneider Electric SE
Publication of EP0619592A1 publication Critical patent/EP0619592A1/de
Application granted granted Critical
Publication of EP0619592B1 publication Critical patent/EP0619592B1/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
    • H01H9/36—Metal parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
    • 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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars

Definitions

  • Such a device is described in documents DE-A 1180453 and FR-A 2495 826. These are single-pole miniature circuit breakers using a movable fork contact, and the placing in series of two extinguishing chambers to increase the power of device shutdown.
  • the contact system is not designed to generate electrodynamic repulsion, and the percussion action of the magnetic trip unit is generally used to accelerate the opening of the contacts in the event of a short-circuit current.
  • the invention relates to a multipole circuit breaker with common insulating housing and with electrodynamic repulsion for rapid opening of the contacts.
  • the electrodynamic repulsion effect results from the passage of a short-circuit current through the contacts shaped according to a current loop. This repulsion results in a separation of the contacts before the intervention of the control mechanism.
  • the speed of movement of the movable contact depends both on the shape of the current loop, and on the mass of the movable contact arm. Rapid movement therefore requires either a light movable contact or a complex and expensive copper circuit.
  • the choice of a light movable contact nevertheless poses the problem of overheating due to the passage of the arc current in the movable contact.
  • a first object of the invention consists in improving the breaking of a multipole circuit breaker with opening by electrodynamic repulsion and with double breaking chamber per pole.
  • a second object of the invention consists in making a multipole circuit breaker having a cut-off bulb per pole, with the insertion of various types of arc extinguishing chambers according to the desired breaking capacity.
  • the circuit breaker according to the invention is characterized in that the two arc extinguishing chambers comprise a common end sheet, of conductive material, disposed opposite the fixed contacts, and serving both as a shunting of the movable contact at the end of the opening stroke after switching of the arc on said end plate, and of electrical coupling device in series of the two arc extinguishing chambers, that each breaking module is formed by a parallelepipedal plastic bulb, containing the two fixed contacts, the two arc extinguishing chambers, the common end plate, and a pair of connection pads, which the intermediate wall subdivides the interior of the 'bulb in two adjacent compartments, open on the bottom side, and that the movable contact enters the two compartments through a through hole located opposite the bottom.
  • Each breaking module is formed by a one-piece parallelepiped plastic bulb, enclosing the two fixed contacts, the two arc extinguishing chambers, the common end plate, and a pair of connection pads.
  • the interior of the bulb is subdivided into two adjacent compartments by an insulating wall, and each extinguishing chamber is inserted into the bulb from the bottom, bearing on the edges of the corresponding compartment.
  • the common end plate extends over the entire width of the bulb.
  • a pole of a multipole circuit breaker 10 with molded insulating housing 12 comprises a single-pole breaking module 14, formed by a one-piece bulb 16 of molded plastic, and having the shape of a rectangular parallelepiped.
  • the bulb 16 comprises a bottom 18, a front face 20 having an orifice 22 for the passage of the movable contact 24, two large parallel lateral faces 26, 28 and two small parallel faces 30, 32 for connection.
  • the breaking module 14 is of the type with electrodynamic repulsion of the contacts.
  • the triggering device comprises a magnetothermal trigger module 46, equipped opposite the pad 44, with a fourth contact pad 48 forming part of the other terminal 50 for connecting the pole.
  • the trip module 46 is inserted in series in the pole with the contacts 34, 36, 24 of the cut-off module 14.
  • the current returns through the input terminal 40, and flows successively in the range 38, the conductor 35, the fixed contact 34, the movable contact 24, the other fixed contact 36, the conductor 37, the pads 42, 44, the trip unit 46, the contact pad 48 and the output terminal 50.
  • the triggering device further comprises a trigger bar 52 mounted with limited rotation between an armed position and a triggered position as a function of the position of the actuator of the trigger 46, for example the bimetallic strip 54 or the pallet 56.
  • the rotary bar 52 is moved to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold.
  • Trigger bar 52 cooperates on the other hand, with a latch 58 for attaching a control mechanism 60 to toggle joint 62 and to lever 64.
  • the mechanism 60 is common to all of the poles, and is housed in the housing 12 between a pair of metal support plates 66, only the handle 64 being accessible from the outside by passing through a passageway of the housing 12, for circuit breaker control 10.
  • the lower link 80 of the toggle joint 62 is coupled to a protuberance 81 of a switching bar 82 serving to support the movable contacts 24 of all the poles.
  • the switching bar 82 is made of insulating material and extends parallel to the trigger bar 52 in the transverse direction of the poles.
  • the unlocking order of the lock 58 can come from the magnetothermal trigger module 46, or from an auxiliary trigger, in particular with a lack of voltage MN, with emission of current MX, differential, etc.
  • Each cut-off module 14 contains two arc extinguishing chambers 84, 86, being in communication with an opening or channel 88 for exhaust of the cut-off gases towards the outside of the bulb 16.
  • Each extinguishing chamber arc 84, 86 is formed by a stack of deionization plates with V-notches oriented towards the movable contact 24.
  • the switching bar 82 shown in detail in FIG. 4, is equipped with three movable contacts 24, distributed at regular intervals along the transverse direction of the bar 82.
  • Each movable contact 24 has the form of a fork cooperating in the closed position with the two fixed contacts 34, 36.
  • each bulb 16 comprises a pair of U-shaped notches 90, oriented on the side of the front face 20, and serving as bearings for the switching bar 82.
  • each breaking module 14 The interior of the bulb 16 of each breaking module 14 is subdivided by an insulating wall 92 intermediate into two adjacent compartments 94, 96 open on the bottom side 18.
  • the movable fork contact 24 enters the two compartments 94, 96 through the orifice 22 located opposite the bottom 18, and is positioned astride the wall 92.
  • the fixed contact 34 and the arc extinguishing chamber 84 are housed in the first compartment 94.
  • the other fixed contact 36 and the arc extinguishing chamber 96 are in the second compartment 96.
  • Each fixed contact 34, 36 is extended in the compartment 94, 96 associated by a metal electrode 98, 100 serving as an arc horn, which is arranged opposite the connecting conductor 35, 37.
  • the two electrodes 98, 100 are rectilinear and extend parallel to each other, being separated by the insulating wall 92.
  • the two arc extinguishing chambers 84, 86 have a common end plate 102, which extends over the entire width of the bulb 16 on the side of the exhaust opening 88.
  • the insulating wall 92 s 'extends in the median plane of the bulb 16 and is perpendicular to the metal end plate 102 without passing through it.
  • the end sheet 102 has two notches 104, 106 in a V aligned respectively with the notches of the elementary sheets of the chambers 84, 86.
  • the two arc extinguishing chambers 84, 86 with deionization sheets, are surrounded by the common end sheet 102, and the two electrodes 98, 100.
  • the two connecting conductors 35, 37 are arranged at the outside of the bulb 16 in housings provided in large lateral faces 26, 28.
  • the direction of flow of the nominal current is represented by the arrows in FIG. 5.
  • the current flows through the conductor of link 35 to the fixed contact 34, then circulates in the movable contact 24 in a fork passing from the first compartment 94 to the second compartment 96. It emerges from the bulb 16 towards the second connection pad 42 via the fixed contact 36 , and the connecting conductor 37.
  • the nominal current flows neither in the electrodes 98, 100, nor in the end sheet 102.
  • the arc current successively travels through the electrode 98 and the first extinguishing chamber 84 in the first compartment 94, then crosses the end sheet 102 in the transverse direction of the bulb 16 to circulate in the second compartment 96 through the extinguishing chamber 86, the electrode 100 and the fixed contact 36.
  • the two arc extinguishing chambers 84, 86 are electrically connected in series by the passage of the current arc in the sheet 102. This results in effective cooling of the arc and rapid extinction of the latter.
  • Arc guide cheeks are integrated into the side walls, delimiting the two compartments 94, 96 juxtaposed with the bulb 16. These cheeks are made of insulating material resistant to arc action, this material being different from that used for the rest of the one-piece bulb 16.
  • the arc extinguishing chambers 84, 86 are supported on flanges 110 of the bulb 16, after insertion through the bottom 18. These chambers 84, 86 comprise several interchangeable types as a function of the desired breaking capacity.
  • the end sheet 102 can be pierced with holes 112 (see FIG. 6), making the outlet of the chambers 84, 86 communicate with the opening 88 for exhaust of the cutting gases.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Claims (5)

  1. Leistungsschalter mit Isolierstoffgehäuse (12) und einem Abschaltmodul (14), das pro Pol
    - zwei nebeneinander angeordnete und mit jeweils einem Löschblechpaket bestückte Lichtbogenlöschkammern (84), (86),
    - eine zwischen den beiden Lichtbogenlöschkammern (84), (86) angeordnete Isolierstoff-Zwischenwand (92),
    - ein Festkontaktpaar (34), (36), das mit einem in Form eines, die genannte Wand (92) übergreifenden Bügels ausgebildeten beweglichen Kontakt (24) zusammenwirkt,
    - sowie einen Betätigungsmechanismus (60) des beweglichen Kontakts (24) zum Ein- und Ausschalten des Leistungsschalters umfaßt,
    dadurch gekennzeichent, daß die beiden Lichtbogenlöschkammern (84), (86) ein gemeinsames Endblech (102) aus einem leitenden Material aufweisen, das auf der den Festkontakten (34), (36) abgewandten Seite angeordnet ist und sowohl als am Ende des Ausschalthubs nach dem Umspringen des Lichtbogens auf das genannte Endblech (102) wirkendes Überbrückungsglied des beweglichen Kontakts (24) als auch als elektrisches Verbindungslied zur Hintereinanderschaltung der beiden Lichtbogenlöschkammern (84), (86) dient, daß jedes Abschaltmodul (14) aus einem einstückigen kastenförmigen Kammerraum (16) aus Kunststoff besteht, der die beiden Festkontakte (34), (36), die beiden Lichtbogenlöschkammern (84), (86), das gemeinsame Endblech (102) und ein Anschlußpaar (38), (42) umschließt, daß die Zwischenwand (92) den Innenraum des Kammerraums (16) in zwei aneinandergrenzende, zum Boden (18) hin offene Abteile (94), (96) unterteilt und daß der bewegliche Kontakt (24) durch eine auf der dem Boden (18) abgewandten Seite ausgebildete Durchführungsöffnung (22) in die beiden Abteile (94), (96) hineinragt.
  2. Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß das Endblech (102) parallel zu den Einzelblechen der beiden Lichtbogenlöschkammern (84), (86) verläuft, daß jeder Festkontakt (34), (36) durch eine als Lichtbogenhorn dienende Metallelektrode (98), (100) verlängert ist und daß die genannte lsolierstoffwand (92) in der senkrecht zum Endblech (102) liegenden Mittelebene zwischen den beiden Elektroden (98), (100) angeordnet ist.
  3. Leistungsschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Endblech (102) zwei V-förmige Einschnitte (104), (106) aufweist, die jeweils fluchtend zu den in den Blechen der Lichtbogenlöschkammern (84), (86) ausgebildeten Einschnitten angeordnet sind.
  4. Leistungsschalter nach Anspruch 3, dadurch gekennzeichnet, daß das Endblech (102) mit Öffnungen (112) versehen ist, die eine Verbindung zwischen dem Ausgang der Lichtbogenlöschkammer (84), (86) und einem Kanal (88) zur Abführung der Löschgase herstellen.
  5. Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß sich das gemeinsame Endblech (102) über die gesamte Breite des Kammerraums (16) erstreckt, und daß sich jede Lichtbogenlöschkammer (84), (86) auf Randvorsprüngen (110) des jeweiligen Abteils (94), (96) abstützt, wobei die genannten Bleche senkrecht zum Boden (18) angeordnet sind.
EP19940420093 1993-04-07 1994-03-22 Elektrischer Schutzschalter mit elektrodynamischer Kontaktabstossung und mit Doppellöschkammern Expired - Lifetime EP0619592B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304297A FR2703821B1 (fr) 1993-04-07 1993-04-07 Disjoncteur électrique à répulsion électrodynamique des contacts et à chambres de coupure double.
FR9304297 1993-04-07

Publications (2)

Publication Number Publication Date
EP0619592A1 EP0619592A1 (de) 1994-10-12
EP0619592B1 true EP0619592B1 (de) 1997-01-29

Family

ID=9445984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940420093 Expired - Lifetime EP0619592B1 (de) 1993-04-07 1994-03-22 Elektrischer Schutzschalter mit elektrodynamischer Kontaktabstossung und mit Doppellöschkammern

Country Status (4)

Country Link
EP (1) EP0619592B1 (de)
DE (1) DE69401605T2 (de)
ES (1) ES2097626T3 (de)
FR (1) FR2703821B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803922A1 (de) * 1998-02-02 1999-08-05 Maier & Cie C Kontaktanordnung für einen Installationseinbauschalter
EP1220260A1 (de) * 2000-12-27 2002-07-03 ABB Schweiz AG Leistungsschalter mit einer doppeltunterbrechenden Kontaktanordnung
IT1325891B (it) * 2001-06-22 2004-12-30 Abb Service Srl Polo interruttore miniaturizzato
JP2007280928A (ja) * 2006-03-13 2007-10-25 Fuji Electric Fa Components & Systems Co Ltd 回路遮断器
JP5256667B2 (ja) * 2007-08-27 2013-08-07 富士電機機器制御株式会社 回路遮断器
US8912461B2 (en) 2012-01-23 2014-12-16 General Electric Company Arc chute assembly and method of manufacturing same
DE102012110411A1 (de) * 2012-10-31 2014-05-15 Eaton Industries (Austria) Gmbh Gleichstromschaltgerät
CN113838687A (zh) * 2020-06-24 2021-12-24 施耐德电器工业公司 具有辅助分流组件的分断单元和双电源转换开关

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH140851A (de) * 1951-04-08 1930-06-30 Siemens Ag Einrichtung zur Löschung des Lichtbogens bei elektrischen Unterbrechungsstellen durch Druckluft.
DE6911874U (de) * 1969-03-25 1969-07-24 Bbc Brown Boveri & Cie Schraubstoepselautomat
FR2495826A1 (fr) * 1980-12-09 1982-06-11 Merlin Gerin Disjoncteur miniature a haut pouvoir de coupure
DE8620645U1 (de) * 1986-07-31 1988-01-28 Siemens AG, 1000 Berlin und 8000 München Strombegrenzendes Schaltelement
JPH088048B2 (ja) * 1989-09-18 1996-01-29 三菱電機株式会社 限流装置

Also Published As

Publication number Publication date
DE69401605T2 (de) 1997-06-26
FR2703821B1 (fr) 1995-05-12
EP0619592A1 (de) 1994-10-12
DE69401605D1 (de) 1997-03-13
FR2703821A1 (fr) 1994-10-14
ES2097626T3 (es) 1997-04-01

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