EP0713232A1 - Schaltkammer eines Lastschalters - Google Patents

Schaltkammer eines Lastschalters Download PDF

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Publication number
EP0713232A1
EP0713232A1 EP95410128A EP95410128A EP0713232A1 EP 0713232 A1 EP0713232 A1 EP 0713232A1 EP 95410128 A EP95410128 A EP 95410128A EP 95410128 A EP95410128 A EP 95410128A EP 0713232 A1 EP0713232 A1 EP 0713232A1
Authority
EP
European Patent Office
Prior art keywords
movable contact
chamber
arc
cut
chamber according
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
EP95410128A
Other languages
English (en)
French (fr)
Other versions
EP0713232B1 (de
Inventor
Christian Schneider Electric Fievet
Denis Schneider Electric Giraud
Steve Schneider Electric Rowe
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 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 EP0713232A1 publication Critical patent/EP0713232A1/de
Application granted granted Critical
Publication of EP0713232B1 publication Critical patent/EP0713232B1/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
    • H01H9/52—Cooling of switch 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
    • H01H9/346—Details concerning the arc formation chamber

Definitions

  • the invention relates to the breaking chamber of an electric circuit breaker, comprising an arc-forming chamber containing a fixed contact and a movable contact, which, at the time of their separation form an arc between them, said formation chamber communicating with the entrance to a second chamber, called the arc extinction chamber.
  • circuit breakers in particular miniature circuit breakers, it has been observed that after the switching of the arc, and the displacement of the latter in the breaking chamber in the direction of the extinguishing chamber, a current of a few amperes remains on the mobile contact. This low residual current is at the origin of a phenomenon called "reclaking" which is defined by the disappearance in a few microseconds of the arc present in the extinguishing chamber and appearance of the latter at the movable contact.
  • the present invention solves this problem and proposes an electrical circuit breaker cut-out chamber in which the risks of re-plating are considerably reduced.
  • the present invention relates to a breaking chamber of an electric circuit breaker comprising an arc forming chamber containing a fixed contact and a movable contact, which, at the time of their separation form an arc between them.
  • the formation chamber communicates with the entrance to a second so-called arc extinguishing chamber, and the breaking chamber is characterized in that it further comprises at least one cooler placed inside the formation of an arc so as to cool the gases present around the movable contact after the switching of the arc.
  • the above-mentioned coolers are placed around the movable contact.
  • the above-mentioned coolers are placed between the movable contact and the aforementioned extinguishing chamber, at a predetermined distance from said movable contact.
  • the aforementioned coolers consist of plates or tubes.
  • the above-mentioned coolers comprise two sets of plates parallel to each other, arranged on either side of the movable contact.
  • these plates extend substantially parallel to the movable contact.
  • the above-mentioned coolers comprise two sets of tubes parallel to each other, arranged on either side of the movable contact.
  • these tubes extend substantially perpendicular to the movable contact.
  • the above-mentioned coolers are made of metal or ceramic.
  • Figures 1, 2 and 3 are three schematic sectional views, respectively illustrating three particular embodiments of the invention.
  • FIGS. 1a, 2a and 3a are schematic side views, illustrating the shape and the arrangement of the coolers corresponding respectively to FIGS. 1, 2 and 3.
  • a pole 1 of miniature circuit breaker comprising an insulating housing B, having on its front face an operating handle 2 and on its two narrow lateral faces 3, 4, connection terminals 5, 6.
  • a movable contact 7 At the inside the housing B are housed, as is known per se, a movable contact 7 and a fixed contact 8.
  • the movable contact 7 is controlled by a control mechanism (not shown) connecting the aforementioned lever 2 to the movable contact 7 for the contact closure.
  • a thermal trip device and an electromagnetic trip device (not shown), capable of causing, in the event of an overload or short-circuit, an automatic opening of the contacts.
  • the lower part of the housing B contains a breaking chamber 9 constituted by a first arc-forming chamber 10, communicating with the inlet of a second chamber 11, called the arc extinction chamber, comprising separators 13 constituted by a stack of plates (or sheets) which extend parallel to the base 12 of the housing B.
  • the movable contact 7 extends substantially perpendicularly to the plane of the plates 13, so as to draw an arc between the contacts 7, 8, during their separation, the initial direction of which is substantially parallel to the plates 13.
  • the abovementioned breaking chamber 9 is delimited laterally by arcing horns 14, 15 respectively connected electrically to the two aforementioned terminals 5, 6. These arcing horns 14, 15 are arranged so as to pick up the arc drawn between the contacts 7, 8 during their separation.
  • cooling elements 16 are placed around the movable contact 7 and are intended to cool the hot gases present around the movable contact 7 after the switching of the arc.
  • These coolers 16 consist of two sets 17a, 17b of plates 17 parallel to each other, said sets being disposed respectively on either side of the movable contact 7.
  • these cooling elements 16, or coolers are constituted by two sets 18a, 18b of tubes 18 parallel to each other, said sets 18a, 18b being arranged on either side of the contact mobile 7.
  • these tubes 18, instead of being arranged around the movable contact 7, are placed in the arc-forming chamber 10, at a certain distance from said contact 7, for example at same distance between the separators 13 and the movable contact 7. It will be noted that in this case, the two sets of tubes 18a, 18b will be separated by a distance a greater than the width of the movable contact 7. In these three embodiments, the large exchange surface of the coolers 16 results in significant cooling of the gas.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
EP19950410128 1994-11-18 1995-11-10 Schaltkammer eines Lastschalters Expired - Lifetime EP0713232B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414006A FR2727240B1 (fr) 1994-11-18 1994-11-18 Chambre de coupure d'un disjoncteur electrique
FR9414006 1994-11-18

Publications (2)

Publication Number Publication Date
EP0713232A1 true EP0713232A1 (de) 1996-05-22
EP0713232B1 EP0713232B1 (de) 1999-07-28

Family

ID=9469049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950410128 Expired - Lifetime EP0713232B1 (de) 1994-11-18 1995-11-10 Schaltkammer eines Lastschalters

Country Status (4)

Country Link
EP (1) EP0713232B1 (de)
DE (1) DE69511046T2 (de)
ES (1) ES2135025T3 (de)
FR (1) FR2727240B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011119148A1 (en) * 2010-03-22 2011-09-29 Siemens Industry, Inc. Arc formation chamber with improved arc compression for circuit breaker.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007001802B4 (de) * 2006-12-22 2010-02-25 Abb Ag Elektrisches Schaltgerät
DE102017204942B4 (de) * 2017-03-23 2022-01-20 Siemens Aktiengesellschaft Elektromechanisches Schutzschaltgerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1922747A1 (de) * 1969-05-03 1970-11-05 Bbc Brown Boveri & Cie Lichtbogenkammer
EP0183145A2 (de) * 1984-11-27 1986-06-04 Asea Brown Boveri Aktiengesellschaft Elektrisches Schaltgerät, insbesondere Leitungsschutzschalter
FR2575861A1 (fr) * 1985-01-07 1986-07-11 Merlin Gerin Disjoncteur electrique miniature a chambre de formation d'arc
DE3619241A1 (de) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Loescheinrichtung fuer einen leitungsschutzschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1922747A1 (de) * 1969-05-03 1970-11-05 Bbc Brown Boveri & Cie Lichtbogenkammer
EP0183145A2 (de) * 1984-11-27 1986-06-04 Asea Brown Boveri Aktiengesellschaft Elektrisches Schaltgerät, insbesondere Leitungsschutzschalter
FR2575861A1 (fr) * 1985-01-07 1986-07-11 Merlin Gerin Disjoncteur electrique miniature a chambre de formation d'arc
DE3619241A1 (de) * 1986-06-07 1987-12-10 Kloeckner Moeller Elektrizit Loescheinrichtung fuer einen leitungsschutzschalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8164018B2 (en) 2009-03-23 2012-04-24 Siemens Industry, Inc. Circuit breaker arc chambers and methods for operating same
WO2011119148A1 (en) * 2010-03-22 2011-09-29 Siemens Industry, Inc. Arc formation chamber with improved arc compression for circuit breaker.

Also Published As

Publication number Publication date
EP0713232B1 (de) 1999-07-28
FR2727240A1 (fr) 1996-05-24
ES2135025T3 (es) 1999-10-16
DE69511046T2 (de) 2000-02-17
DE69511046D1 (de) 1999-09-02
FR2727240B1 (fr) 1996-12-13

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