EP1995747A2 - Unterbrechungskammer und Sicherungsautomat, der mit einer solchen Unterbrechungskammer ausgestattet ist - Google Patents

Unterbrechungskammer und Sicherungsautomat, der mit einer solchen Unterbrechungskammer ausgestattet ist Download PDF

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Publication number
EP1995747A2
EP1995747A2 EP08354024A EP08354024A EP1995747A2 EP 1995747 A2 EP1995747 A2 EP 1995747A2 EP 08354024 A EP08354024 A EP 08354024A EP 08354024 A EP08354024 A EP 08354024A EP 1995747 A2 EP1995747 A2 EP 1995747A2
Authority
EP
European Patent Office
Prior art keywords
chamber
permanent magnets
arc
cheek
section
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
EP08354024A
Other languages
English (en)
French (fr)
Other versions
EP1995747A3 (de
EP1995747B1 (de
Inventor
Eric Domejean
Thierry Bec-Lucat
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 EP1995747A2 publication Critical patent/EP1995747A2/de
Publication of EP1995747A3 publication Critical patent/EP1995747A3/de
Application granted granted Critical
Publication of EP1995747B1 publication Critical patent/EP1995747B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
    • 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
    • H01H2009/348—Provisions for recirculation of arcing gasses to improve the arc extinguishing, e.g. move the arc quicker into the arcing chamber

Definitions

  • the invention relates to the field of cut-off devices in particular for cutting DC currents, in particular currents of low intensity, that is to say between 0.5 and 150 amperes.
  • the invention relates to a breaking chamber for a circuit breaker comprising an arc extinguishing chamber formed by a stack of deionization plates and an arc forming chamber defined by a first and a second cheek, said breaking chamber being equipped. permanent magnets disposed behind at least the first cheek.
  • the invention also relates to a circuit breaker having separable contacts and an interrupting chamber for extinguishing an electric arc formed during the opening of said contacts.
  • the arc-forming chamber of a breaking chamber generally extends between a contact zone and the extinguishing chamber. In the contact area, the formation of the arc is initiated by separating said contacts. Most often, one contact is mobile and the other is fixed.
  • This zone of contacts generally comprises means of capturing the arc, usually electrodes or horns of arc, contributing to the departure of the arc of the contacts and its evacuation towards the extinction chamber.
  • the arc generally moves in a space delimited by two cheeks, made of an electrically insulating material, between the contact zone and the deionization plates of the extinguishing chamber.
  • the electromagnetic force induced by the flow of current in one of the conductors connected to the contacts is generally sufficient to propel the arc and evacuate it rapidly to the deionization plates of the extinguishing chamber.
  • this electromagnetic force may not be sufficient to propel the arc sufficiently and evacuate to the deionization plates.
  • the French patent application FR2622736 discloses a circuit breaker having a break chamber having a permanent magnet disposed between one of the cheeks of the arc forming chamber and the adjacent wall of the circuit breaker housing. This permanent magnet makes it possible to propel the electric arc formed by the breaking of a continuous current of low intensity.
  • a disadvantage of such a breaking chamber is that the magnetic field of the permanent magnet is sometimes insufficient to effectively propel and evacuate the electric arc to the extinguishing chamber.
  • the magnetic field generated by the permanent magnet may tend to attract the arc to the cheek adjacent to the magnet, and prevent its progression and evacuation to the quench chamber.
  • the aim of the invention is to overcome the drawbacks of the breaking chambers of the prior art by proposing a breaking chamber for a circuit breaker comprising an arc extinguishing chamber formed by a stack of deionization plates and an arc formation chamber. delimited by a first and a second cheek located substantially equidistant from a median longitudinal plane, said interrupting chamber being equipped with permanent magnets at least partly arranged behind the first cheek, the arc forming chamber comprising a first reinforced induction section and a deflection section between said reinforced induction section and the arc extinction chamber.
  • the first and second flanges are located substantially equidistant from the median longitudinal plane.
  • the two magnetized fractions of the first portion of the permanent magnets generate magnetic fields having substantially equal intensities.
  • the two magnetized fractions of the first part of the permanent magnets are arranged symmetrically with respect to the median longitudinal plane of the arc formation chamber.
  • At least a fraction of the second portion of the permanent magnets is disposed behind the first cheek so that the magnetic field generated by said fraction is greater than that generated by the remaining fraction of the second portion of the permanent magnets.
  • all of the second portion of the permanent magnets is disposed behind the first cheek.
  • the deionization plates comprise a leading edge equipped with a central recess and at least one lateral portion facing the deflection section, the electric arc being directed in the deflection section towards said lateral portion.
  • the distance between the second portion of the permanent magnets and the lateral portion of the leading edge of the deionization plates is less than 1 millimeter.
  • the first cheek is made of ceramic material.
  • the second cheek is a gaseous organic material.
  • the invention also relates to a circuit breaker having separable contacts and a breaking chamber for extinguishing an electric arc formed during the opening of said contacts, the breaking chamber being as described above.
  • the figure 1 represents a partial view of a breaker pole having a breaking chamber according to the invention.
  • the figure 2 represents a partial view of the breaker pole of the figure 1 in a section along a longitudinal axis AA 'in the median longitudinal plane.
  • the circuit breaker pole comprises a movable contact 1 and a fixed contact 2, each of these contacts being connected via a conductor to a connection terminal of the circuit breaker.
  • the opening of the movable contact can be controlled by a control mechanism using a handle or by unrepresented triggering means.
  • These tripping means may comprise an electromagnetic release and a thermal release which may cause, in case of overload or short-circuit, an automatic opening of the movable contact 1.
  • the elements of the circuit breaker such as the separable contacts, the control mechanism and the triggering means, are generally housed in a housing 3 molded in an insulating material. As shown in figure 2 the housing 3 also contains a breaking chamber 4 for extinguishing the electric arc formed between the separable contacts when they open.
  • the breaking chamber 4 comprises an arc forming chamber 11 delimited by a first cheek 12 and a second cheek 13, said cheeks being substantially parallel.
  • the cheeks 12 and 13 are disposed equidistant from a median longitudinal plane 10 carrying the longitudinal axis A-A '.
  • One of the terminals of the circuit breaker pole is electrically connected to the fixed contact 2 and extends to form an electrode or horn 14 which extends in the upper part of the arc forming chamber.
  • Another terminal of the circuit breaker pole electrically connected to the movable contact 1 is connected to another electrode or horn 15 which extends into the lower part of the arc-forming chamber.
  • the electrodes or horns 14 and 15 are arranged to capture an arc drawn between the contacts 1 and 2 during their separation. The electric arc formed between the two contacts is thus captured by the electrodes to be transported and discharged to an arc extinguishing chamber 21 of the interrupting chamber.
  • the separable contacts 1 and 2 as well as the electrode 14 have been shown in dashed line, because they are concealed in particular by the second cheek 13.
  • These contacts 1 and 2 are arranged in the median longitudinal plane 10, at equal distances compared to the first and second cheek.
  • the distance between the movable contact 1 and the electrode 15 in the lower part of the arc-forming chamber is generally between 4 and 8 millimeters. This distance provides good performance for breaking high currents.
  • the arc extinguishing chamber 21 is formed by a stack of deionization plates 22 which are generally metal plates.
  • the deionization plates have a leading edge through which the electric arc enters the extinguishing chamber.
  • the leading edge of the deionization plates generally comprises a central recess 23.
  • the magnetic induction created by the current flow in the electrodes 14 and 15 is generally sufficient to evacuate the arc towards the extinction chamber 21.
  • the arc forming chamber comprises a reinforced induction section 31 in which the arc is propelled towards the arc extinguishing chamber 21 by the magnetic field generated by a first part. permanent magnets.
  • the magnetic field, in the median longitudinal plane of the arc-forming chamber, generated by the first part of the permanent magnets in the reinforced induction section is larger than that generated by the other part of the permanent magnets in the rest of the bow formation chamber.
  • the displacement of the electric arc is represented by points at different times.
  • the electric arc is represented by the points 41 and 42.
  • the first part of the permanent magnets comprises not only a first magnetized fraction 32, but also a second magnetized fraction 33.
  • the magnetized fractions 32 and 33 are disposed behind each of the cheeks 12 and 13.
  • the first part of the permanent magnets means a fraction defined with respect to said first part of the permanent magnets, that is to say with respect to the part of the permanent magnets in the reinforced induction section.
  • the presence of the second magnetized fraction 33 of the first part of the permanent magnets generates a magnetic field which is added to that generated by the first magnetized fraction 32. This makes it possible to significantly increase the magnetic force induced by the first part of the permanent magnets. on the electric arc.
  • the second magnetized fraction 33 of the first part of the permanent magnets allows the switching of the foot of the electric arc between the movable contact 1 and the electrode 15, as well as the departure and the evacuation of said electric arc towards the chamber 'extinction.
  • the effect of the distance D between the moving contact 1 and the electrode 15 is therefore compensated by the presence of the second magnetized fraction 33.
  • the first and second magnetized portions 32 and 33 of the first portion of the permanent magnets generate magnetic fields of substantially equal intensity.
  • the magnetic force to propel the electric arc towards the extinguishing chamber 21 has been doubled, which makes it possible to propel the electric arc more rapidly towards the extinguishing chamber.
  • the first and second magnetized portions 32 and 33 of the first portion of the permanent magnets are arranged symmetrically with respect to the median longitudinal plane 10 of the arc-forming chamber. This makes it possible to further improve the described properties previously, that is to say to propel the electric arc more effectively towards the extinction chamber.
  • the arc forming chamber 11 has a deflection section 51 in which the electric arc is deflected with respect to the median longitudinal plane 10 of the arc formation chamber to the first cheek 12, by the magnetic field generated by a second part of the permanent magnets, the magnetic field generated by the second part of the permanent magnets being substantially lower than that generated by the first part of the permanent magnets. Since the magnetic field in the median longitudinal plane 10 generated by the second part of the permanent magnets is smaller than that of the first part of the permanent magnets and unsymmetrical with respect to said median longitudinal plane, the electric arc is deviated from its path. Thus, the deflection component of the electric arc is mainly obtained by means of the second part of the permanent magnets in the deflection section 51.
  • the entire second portion 52 of the permanent magnets is disposed behind the first cheek 12.
  • only a fraction of the second portion of the permanent magnets may be disposed behind the first cheek, so that the magnetic field generated by said fraction is greater than that generated by the remaining fraction of the second part of the permanent magnets, the latter being disposed behind the second cheek 13.
  • magnetized fraction of the second part of the permanent magnets is meant a defined fraction relative to the part of the permanent magnets in the deflection section.
  • the points 61, 62, 63, 64 and 65 represent the positions of the electric arc in the deflection section at different times. These points are close to the first cheek 12 because the second portion 52 of the permanent magnets deflects the electric arc. In this way, the electric arc is close to the first cheek 12 while keeping a magnetic force along the longitudinal axis AA 'sufficient not to stick to it and to run aground on contact.
  • the leading edge of the deionization plates is equipped with a central recess 23 and two lateral parts 71 and 72 oriented towards the deflection section 51 of the arc formation chamber.
  • the electric arc is directed into the deflection section towards the lateral portion 71.
  • the distance between the second portion 52 of the permanent magnets and the lateral portion 71 of the deionization plates is less than 1 millimeter. This distance is sufficiently small to prevent this electric arc from going out in the arc forming chamber.
  • the cheeks 12 and 13 delimiting the arc-forming chamber are generally formed of an electrically insulating material.
  • the cheeks may be formed of an electrically insulating material that does not erode easily, such as ceramic, for example soapstone.
  • the cheeks may be formed of an electrically insulating gas-forming material, for example gas-forming nylon.
  • the first cheek 12 is made of ceramic material
  • the second cheek 13 is a gaseous organic material.
  • the gas play makes it possible to increase the pressure in the area of the contacts and thus promotes the departure of the electric arc from the contact zone to the extinguishing chamber.
  • the interrupting chamber comprises a first and a second permanent magnet respectively disposed behind each of the cheeks 12 and 13.
  • the magnet disposed behind the first cheek 12 extends over the two reinforced induction and deflection sections of the chamber. arc formation and the magnet disposed behind the second cheek 13 extends only on the reinforced induction section.
  • the first part of the permanent magnets of the reinforced induction section essentially consists of the first magnet, ie the magnetized fraction 32, and the fraction of the second magnet in the reinforced induction section, that is, the magnetized fraction 33.
  • the second part of the permanent magnets of the deflection section is essentially constituted by the fraction of the second magnet in the deflection section, ie the magnetic fraction 52 .
  • the invention also extends to a breaking chamber comprising two permanent magnets disposed behind the first cheek respectively in the reinforced induction section and in the deflection section, the magnet in the reinforced induction section generating a magnetic field. of substantially greater intensity than that in the deflection section.
  • the invention also extends to a breaking chamber comprising three permanent magnets, a first and a second magnet being disposed behind the first cheek respectively in the reinforced induction section and in the deflection section, and a third magnet being disposed behind the second cheek in the reinforced induction section.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
EP08354024.5A 2007-05-22 2008-03-27 Unterbrechungskammer und Sicherungsautomat, der mit einer solchen Unterbrechungskammer ausgestattet ist Active EP1995747B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0703632A FR2916571B1 (fr) 2007-05-22 2007-05-22 Chambre de coupure et disjoncteur equipe d'une telle chambre de coupure

Publications (3)

Publication Number Publication Date
EP1995747A2 true EP1995747A2 (de) 2008-11-26
EP1995747A3 EP1995747A3 (de) 2010-03-03
EP1995747B1 EP1995747B1 (de) 2013-12-18

Family

ID=38984280

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08354024.5A Active EP1995747B1 (de) 2007-05-22 2008-03-27 Unterbrechungskammer und Sicherungsautomat, der mit einer solchen Unterbrechungskammer ausgestattet ist

Country Status (6)

Country Link
US (1) US7541902B2 (de)
EP (1) EP1995747B1 (de)
CN (1) CN101312098B (de)
ES (1) ES2444700T3 (de)
FR (1) FR2916571B1 (de)
RU (1) RU2451358C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2189996A1 (de) * 2008-11-21 2010-05-26 Schneider Electric Industries SAS Ausschaltvorrichtung für Zweirichtungsgleichstrom und photovoltaische Zellenanordnung mit einer solchen Vorrichtung

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EP2197009B1 (de) * 2008-12-12 2013-11-20 Tyco Electronics AMP GmbH Kontaktbrücke mit Blasmagneten
WO2011127654A1 (en) * 2010-04-14 2011-10-20 Abb Spa Residual current protection device
EP2583293B1 (de) 2010-06-18 2017-12-20 DSM IP Assets B.V. Leistungsschalter
US8222983B2 (en) * 2010-12-08 2012-07-17 Eaton Corporation Single direct current arc chamber, and bi-directional direct current electrical switching apparatus employing the same
US8890019B2 (en) 2011-02-05 2014-11-18 Roger Webster Faulkner Commutating circuit breaker
KR101354405B1 (ko) * 2011-06-07 2014-01-22 후지쯔 콤포넌트 가부시끼가이샤 전자계전기 및 전자계전기의 제조방법
EP2600367A1 (de) * 2011-11-29 2013-06-05 Eaton Industries GmbH Schaltgerät für Gleichstromanwendungen
CN102592890B (zh) * 2012-02-20 2014-03-26 北京航空航天大学 用于直流接触器的无极性氢气混合气体直流灭弧系统
JP6066598B2 (ja) * 2012-07-04 2017-01-25 富士通コンポーネント株式会社 電磁継電器
DE102012223168A1 (de) * 2012-08-29 2014-03-06 Siemens Aktiengesellschaft Elektromechanisches Schaltgerät
US8847096B2 (en) 2012-09-05 2014-09-30 Eaton Corporation Single direct current arc chute, and bi-directional direct current electrical switching apparatus employing the same
DE102012110410A1 (de) * 2012-10-31 2014-04-30 Eaton Industries (Austria) Gmbh Gleichstromschaltgerät
US9006601B2 (en) 2013-03-13 2015-04-14 Eaton Corporation Arc chamber for bi-directional DC
US9343251B2 (en) 2013-10-30 2016-05-17 Eaton Corporation Bi-directional direct current electrical switching apparatus including small permanent magnets on ferromagnetic side members and one set of arc splitter plates
CN103646832B (zh) * 2013-11-30 2016-06-29 德力西电气有限公司 断路器的引弧灭弧装置
FR3027727B1 (fr) * 2014-10-22 2016-12-09 Socomec Sa Chambre de coupure d'arc electrique
WO2016071134A1 (de) * 2014-11-06 2016-05-12 Eaton Electrical Ip Gmbh & Co. Kg System von schaltgaskühl- und partikelfanganordnung
FR3050311B1 (fr) * 2016-04-15 2020-12-04 Schneider Electric Ind Sas Disjoncteur electrique a courant continu
DE102017212033A1 (de) * 2017-07-13 2019-01-17 Siemens Aktiengesellschaft Gleichstrom-Lichtbogenlöschvorrichtung und elektromechanisches Gleichstrom-Schaltgerät
US10336168B2 (en) 2017-09-14 2019-07-02 Ty-Crop Manufacturing Ltd. Apparatus for covering a container load
DE102017223401B4 (de) * 2017-12-20 2019-10-10 Schunk Carbon Technology Gmbh Kontakteinheit und Verfahren
EP3624157B1 (de) 2018-09-17 2024-11-13 Microelettrica Scientifica S.p.A. Verbesserte umschaltvorrichtung oder schütz mit hohen lichtbogenlöschfähigkeiten
CN112582205A (zh) * 2020-12-27 2021-03-30 中国振华电子集团宇光电工有限公司（国营第七七一厂） 一种可增强开断磁场的加强筋

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FR2622736A1 (fr) 1987-10-28 1989-05-05 Merlin Gerin Disjoncteur basse tension, a courant continu, et a joues de guidage de l'arc

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Publication number Priority date Publication date Assignee Title
FR2622736A1 (fr) 1987-10-28 1989-05-05 Merlin Gerin Disjoncteur basse tension, a courant continu, et a joues de guidage de l'arc

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2189996A1 (de) * 2008-11-21 2010-05-26 Schneider Electric Industries SAS Ausschaltvorrichtung für Zweirichtungsgleichstrom und photovoltaische Zellenanordnung mit einer solchen Vorrichtung
FR2938969A1 (fr) * 2008-11-21 2010-05-28 Schneider Electric Ind Sas Dispositif de coupure pour couper un courant continu bidirectionnel et installation a cellules photovoltaiques equipee d'un tel dispositif
US8742278B2 (en) 2008-11-21 2014-06-03 Schneider Electric Industries Sas Switchgear device for breaking a bidirectional direct current and installation with photovoltaic cells equipped with such a device

Also Published As

Publication number Publication date
CN101312098B (zh) 2012-02-08
US20080290068A1 (en) 2008-11-27
RU2008120250A (ru) 2009-11-27
EP1995747A3 (de) 2010-03-03
EP1995747B1 (de) 2013-12-18
RU2451358C2 (ru) 2012-05-20
CN101312098A (zh) 2008-11-26
ES2444700T3 (es) 2014-02-26
FR2916571A1 (fr) 2008-11-28
US7541902B2 (en) 2009-06-02
FR2916571B1 (fr) 2009-09-11

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