EP0649155B1 - Doppelte Lichtbogenlaufschiene für die Lichtbogenleitkammer eines Schutzschalters - Google Patents

Doppelte Lichtbogenlaufschiene für die Lichtbogenleitkammer eines Schutzschalters Download PDF

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Publication number
EP0649155B1
EP0649155B1 EP19930440086 EP93440086A EP0649155B1 EP 0649155 B1 EP0649155 B1 EP 0649155B1 EP 19930440086 EP19930440086 EP 19930440086 EP 93440086 A EP93440086 A EP 93440086A EP 0649155 B1 EP0649155 B1 EP 0649155B1
Authority
EP
European Patent Office
Prior art keywords
arc
loop
cutoff
plates
conduction plate
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
EP19930440086
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English (en)
French (fr)
Other versions
EP0649155A1 (de
Inventor
Denis Herbrech
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.)
Hager Electro SAS
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Hager Electro 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 Hager Electro SAS filed Critical Hager Electro SAS
Priority to DE1993609466 priority Critical patent/DE69309466T2/de
Priority to ES93440086T priority patent/ES2100506T3/es
Priority to EP19930440086 priority patent/EP0649155B1/de
Publication of EP0649155A1 publication Critical patent/EP0649155A1/de
Application granted granted Critical
Publication of EP0649155B1 publication Critical patent/EP0649155B1/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
    • H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the 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
    • H01H1/20—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
    • 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
    • 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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • 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

Definitions

  • the present invention relates to a single-pole circuit breaker with high breaking capacity. More specifically, it relates to an improvement applied to a conventional circuit breaker structure, aiming to significantly increase the breaking capacity, by means of a particular configuration of the arc conduction sheets located in the breaking chambers of these structures.
  • the electrical circuit placed in the insulating case of the circuit breakers targeted by the invention comprises, between the two connection terminals, a thermal bimetal, a magnetic circuit breaker, two movable contacts in the form of a fork cooperating with two fixed contacts placed on both sides an insulating middle partition, which delimits two volumes each receiving a breaking chamber or arc extinguishing chamber associated with a fixed contact.
  • circuit breakers have been known for a long time, for example described in the French patent filed under the number FR 91 04229 in the name of the present applicant. They are intended to provide protection against short-circuits or overloads of current, respectively by tripping of the magnetic circuit breaker or following the thermal deformation of the bimetallic strip.
  • the existence of the two contacts in series allows a first increase in the breaking capacity of the device and it has also been disclosed for example in document EP-A-05397, which describes the closest state of the art.
  • the two arc breaking chambers located on either side of the median insulating partition comprise arc conduction sheets materializing a path starting from the movable contacts to arrive under the stack of deions. They serve to guide the arc which arises when the contacts are opened, so as to bring it to the heart of the extinction chamber, in the stack of deions where it is extinguished.
  • the opening due to the loop effect leads it into the succession of metal sheets, in which it turns off when its voltage exceeds the network voltage.
  • the enlargement movement of the current loop is due to the electrodynamic repulsion efforts to which the virtual conductor represented by the electric arc is subjected. These forces are proportional to the square of the value taken by the current in the circuit.
  • one of the means consists in increasing the speed of transfer of the arc.
  • the arc conduction sheet constitutes, in the extinguishing chamber, the element most suitable for such a modification, in particular due to its positioning in the housing and its structural simplicity. This is why the increase in the breaking capacity is achieved, within the framework of the invention, by a reconfiguration of said arc extinguishing sheet making it possible to increase the value of the current taken into account in this sector of the loop for the establishment of the resulting repulsive force.
  • unipolar circuit breakers comprising a single breaking chamber which contains an arc conduction sheet doubled during the path between the movable contact and the succession of deion plates, so as to substantially double the value of the current taken into account So path. It is the same sheet which has a configuration such that it passes parallel and close to itself at least along said path.
  • Each breaking chamber then comprises a primary conducting sheet and a secondary conducting sheet carrying a current in the same direction.
  • a possible configuration consists in making a transverse loop, that is to say passing from one breaking chamber to the other.
  • the primary conduction sheet of one of said chambers becomes the secondary sheet of the other and vice versa.
  • loop in two separate parts with a fairly high degree of symmetry, although not total. These two parts can be nested one inside the other with a contact zone making it possible to form the loop provided with two doubled portions at the level of the arc conduction sheets.
  • these two parts are composed of a main sheet called primary, the same shape as the arc conduction sheets when they are unique, connected to an equivalent parallel sheet, called secondary, amputated from the portion of the primary sheet which is in contact with the sole of the housing.
  • This secondary sheet is placed at a distance such that it is positioned, after assembly, in the other arc breaking chamber, behind and at a short distance from the primary sheet of this second chamber relative to the electric arc. .
  • transverse sheets parallel to the sole thinner than the primary and secondary sheets because they are located close to their counterparts in the other piece, with which they virtually constitute solid transverse sheets.
  • transverse sheets positioned at the level of the movable contacts actually connect the two primary and secondary sheets of each part. They include notches allowing their mutual intersection and the fixing of the distance between primary and secondary sheets in each chamber.
  • the two transverse sheets adjacent to the sole of the housing do not connect the two conduction sheets of the same part to one another, but they ensure contact with the other part so as to close the loop.
  • one of the pieces has roughly the shape of a p, while the other is in the shape of a q, with non-closed rectangular pans at the lower intersection with the barrel.
  • the barrel constitutes the primary conduction sheet and the sheet parallel to the barrel is the secondary sheet.
  • the contact pads are embedded in the sheets which carry them.
  • a circuit breaker according to the characteristics of the present invention that is to say provided with a transverse loop doubling the arc conduction sheets in the breaking chambers, in combination with a pair of movable contacts placed in series, allows achieve a significantly higher rated breaking capacity than with a single arc conduction sheet per breaking chamber.
  • FIG. 1 the direction of the current and its path has been represented by a double broken black line (1) when the device is in operation. During the period of existence of the arcs, the path bends between the two ends (4, 5) of the fork (3), and is shown in double dashed line (2).
  • the transverse loop (C) appears particularly clearly in this figure. If we follow its path from the stack of deions referenced (10), we realize that the current flows through the primary conduction sheet (20) of the breaking chamber associated with the stack (10), crosses the housing (not shown) transversely, is found in the secondary conduction sheet (21) of the other breaking chamber, performs a return in the transverse loop for wear in the secondary plate (22) of the initial chamber, then ends its journey by the primary conduction plate (23) of the second chamber, containing the succession of deions (11).
  • Figure 2 illustrates a possible configuration of the parts (P 1 , P 2 ) forming the transverse loop.
  • P 1 is in the form of q while P 2 takes the form of a p.
  • the shapes of the transverse sheets are noted, which allow the intersection at the level of the upper sheets (24, 25), and to close the loop at the level of the lower sheets (26, 27).
  • the offset end (27) allows flat contact with the straight end (26).
  • Figure 3 shows the mounting of parts P 1 and P 2 , leading to this transverse loop endowing each breaking chamber with a primary sheet (20, 23) and a secondary sheet (21, 22) for conduction.
  • the two associated sheets are substantially parallel and, from one chamber to another, the two homologous sheets are substantially in the same plane, at least for each of their rectilinear sections.
  • Figures 4 and 5 illustrate the mounting of the transverse loop on the middle part (30), which is used both to support the magnetic assembly (not shown), and to delimit the volumes of the arc breaking chambers.
  • the parts parallel to the sole of the primary sheets (20, 23) form the lower part of the cutting chambers, which are housed in the cavities (31, 32).
  • Figure 6 aims to show the primary and secondary sheets (23, 21) in side view, mounted in the circuit breaker of the invention.
  • This comprises, in a manner known per se, an insulating box (40), provided with a sole (41) intended to cooperate with a standardized rail, and which contains the electrical circuit already mentioned: between the two terminals ( 6, 7), a bimetallic strip (8) connected to the connection terminal (6) by a conductive braid (42), a fork comprising the two movable contacts (A), a magnetic circuit breaker (9) connected to the connection terminal (7) and two arc-breaking chambers (31, 32) arranged on either side of the central partition (30 ) appearing in Figures 4 and 5.
  • the primary (23) and secondary (21) sheets are parallel and at a short distance along their oblique path, along which the current is double for the loop created by the electric arc, since it has the same direction in these two sheets (21, 23). Consequently, the force which acts on the arc, which tends to increase the surface which it embraces, and therefore to push it back towards the stack of deions (11) is much greater than that which would act in the event of uniqueness of the conduction sheet.
  • the arc moves faster towards said stack, allowing faster extinction in the breaking chamber, and an increase in the breaking capacity of the circuit breaker.
  • the time which elapses between the birth and the extinction of the arc can be subdivided into three periods: the switching time between the contact and the conducting sheet, the migration time and the breaking time; If measures such as flooding the contact pads aim to improve the first step, the invention aims above all to reduce the migration time by increasing the speed of propagation of the arc.

Landscapes

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

Claims (7)

  1. Einpoliger Überlastschalter mit hohem Abschaltvermögen, der in einem gegossenen, isolierenden Gehäuse (40), das aus zwei vergossenen Halbschalen gebildet ist und eine an eine genormte Schiene angepaßte Fußplatte (41), eine Oberseite, die einen mit einem Steuermechanismus zum Öffnen und Schließen des Überlastschalters verbundenen Betätigungshebel vorstehen läßt, sowie zwei schmale Seitenflächen enthält, die die Anschlußklemmen (6, 7) einschließen, versehen ist mit einer elektrischen Schaltung, die die Klemmen miteinander verbindet und aus einem thermisch unterbrechenden Bimetall (8) und einer Gabel (3) aufgebaut ist, welche (bei A, B) zwei in Serie geschaltete bewegliche Kontakte aufweist, die mit einem Paar von festen Kontakten zusammenwirken, die beiderseits einer mittigen Trennwand (30) angeordnet sind, die zwei Bogenunterbrechungskammern (31, 32) begrenzt und eine Einheit (9) mit magnetischer Unterbrechung unterstützt, wobei die Unterbrechungskammern (31, 32) jeweils einen Stapel von Entionisierungsblechen (10, 11) aufnehmen, dadurch gekennzeichnet, daß er wenigstens ein Teil enthält, das eine Schleife (C) bildet, die sich transversal zum gegossenen Gehäuse (40) erstreckt und sich symmetrisch auf beiden Seiten der mittleren Trennwand (30) in den zwei Unterbrechungskammern (31, 32) befindet und ermöglicht, in jeder Unterbrechungskammer ein primäres Bogenleitungsblech (20, 23) und ein sekundäres Bogenleitungsblech (21, 22), die parallel zueinander und in geringem gegenseitigen Abstand angeordnet sind, zu erhalten.
  2. Einpoliger Überlastschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Schleife (C), die aus wenigstens einem Teil aufgebaut ist, mit der mittigen Trennwand (30) in der Weise zusammengefügt ist, daß eine Untereinheit gebildet wird, die mit den die Bogenunterbrechungskammern aufbauenden Elementen zusammenhängt, wobei die Untereinheit beim Zusammenbau des Überlastschalters in einem einzigen Vorgang angebracht werden kann.
  3. Einpoliger Überlastschalter nach Anspruch 2, dadurch gekennzeichnet, daß die Schleife (C) zwei Teile (P1, P2) enthält, die ineinander verschachtelt sind, wobei jedes dieser Teile das primäre Leitungsblech (20, 23) einer dieser Unterbrechungskammern (31, 32) und das sekundäre Leitungsblech der anderen (21, 22) enthält, mit transversalen Verbindungsblechen (24, 25) auf Höhe der Kontakte (A, B) und transversalen Blechen (26, 27) in der Nähe der Fußplatte des Gehäuses, die dazu bestimmt sind, die Stromschleife (C) zu schließen.
  4. Einpoliger Überlastschalter nach Anspruch 3, dadurch gekennzeichnet, daß die transversalen Verbindungsbleche (24, 25) Vorsprünge enthalten, die einerseits ihre Verzahnung und andererseits die Festlegung des Abstandes zwischen dem primären und dem sekundären Leitungsblech (20, 21, 22, 23) jeder Bogenunterbrechnungskammer (31, 32) ermöglichen.
  5. Einpoliger Überlastschalter nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, daß die der Fußplatte des Gehäuses benachbarten transversalen Bleche (26, 27) nicht die zwei Leitungsbleche (20, 21; 22, 23) ihres entsprechenden Teils (P1, P2) verbinden, sondern miteinander in der Weise in Kontakt sind, daß sie die Stromschleife (C) schließen.
  6. Einpoliger Überlastschalter nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die zwei Teile (P1, P2) im wesentlichen die Form eines q bzw. eines p mit rechtwinkligem Bauch besitzen, deren Stamm das primäre Leitungsblech (20, 33) bildet, wobei das zum Stamm parallele Blech das sekundäre Leitungsblech (21, 22) bildet.
  7. Einpoliger Überlastschalter nach irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Kontaktpillen der beweglichen und der festen Kontakte (A, B) in die Bleche, die sie tragen, in der Weise eingelassen sind, daß sie für die Bewegung des elektrischen Bogens kein Hindernis bilden.
EP19930440086 1993-10-15 1993-10-15 Doppelte Lichtbogenlaufschiene für die Lichtbogenleitkammer eines Schutzschalters Expired - Lifetime EP0649155B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1993609466 DE69309466T2 (de) 1993-10-15 1993-10-15 Doppelte Lichtbogenlaufschiene für die Lichtbogenleitkammer eines Schutzschalters
ES93440086T ES2100506T3 (es) 1993-10-15 1993-10-15 Chapa de conduccion doble para camara de conduccion de arco de disyuntor.
EP19930440086 EP0649155B1 (de) 1993-10-15 1993-10-15 Doppelte Lichtbogenlaufschiene für die Lichtbogenleitkammer eines Schutzschalters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19930440086 EP0649155B1 (de) 1993-10-15 1993-10-15 Doppelte Lichtbogenlaufschiene für die Lichtbogenleitkammer eines Schutzschalters

Publications (2)

Publication Number Publication Date
EP0649155A1 EP0649155A1 (de) 1995-04-19
EP0649155B1 true EP0649155B1 (de) 1997-04-02

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ID=8214813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930440086 Expired - Lifetime EP0649155B1 (de) 1993-10-15 1993-10-15 Doppelte Lichtbogenlaufschiene für die Lichtbogenleitkammer eines Schutzschalters

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EP (1) EP0649155B1 (de)
DE (1) DE69309466T2 (de)
ES (1) ES2100506T3 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405112B (de) * 1997-02-12 1999-05-25 Felten & Guilleaume Ag Oester Überspannungsableiteinrichtung
DE19734676A1 (de) * 1997-08-11 1999-02-18 Maier & Cie C Schaltgerät
FR2814851B1 (fr) * 2000-10-03 2002-12-20 Hager Electro Disjoncteur magnetique a haut pouvoir de coupure
EP1220260A1 (de) * 2000-12-27 2002-07-03 ABB Schweiz AG Leistungsschalter mit einer doppeltunterbrechenden Kontaktanordnung
ATE390700T1 (de) * 2003-12-22 2008-04-15 Abb Schweiz Ag Lichtbogenlöscheinrichtung für schutzschalter mit doppelunterbrechung
EP1548772A1 (de) * 2003-12-22 2005-06-29 ABB Schweiz Holding AG Lichtbogenlöscheinrichtung für Schutzschalter mit Doppelunterbrechung
EP1615246A1 (de) * 2004-07-05 2006-01-11 ABB Schweiz AG Lichtbogenlöscheinrichtung für Schutzschalter
DE102011078524A1 (de) * 2011-07-01 2013-01-03 Siemens Aktiengesellschaft Doppeltunterbrechendes Schutzschaltgerät
CN105914109B (zh) * 2016-07-06 2018-09-04 上海电科电器科技有限公司 断路器的导电回路
CN114360980B (zh) * 2021-12-31 2022-11-04 浙江华楷电气有限公司 灭弧装置和断路器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2495826A1 (fr) * 1980-12-09 1982-06-11 Merlin Gerin Disjoncteur miniature a haut pouvoir de coupure
US4656446A (en) * 1985-12-17 1987-04-07 Westinghouse Electric Corp. Current limiting circuit breaker with series double break contact system per pole
DE3625425A1 (de) * 1986-07-28 1988-02-04 Bbc Brown Boveri & Cie Leitungsschutzschalter
US4810841A (en) * 1986-07-31 1989-03-07 Siemens Aktiengesellschaft Current-limiting switching element
SU1605284A1 (ru) * 1988-12-14 1990-11-07 Всесоюзный научно-исследовательский, проектно-конструкторский и технологический институт низковольтного аппаратостроения Быстродействующий выключатель

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Publication number Publication date
EP0649155A1 (de) 1995-04-19
DE69309466D1 (de) 1997-05-07
ES2100506T3 (es) 1997-06-16
DE69309466T2 (de) 1997-10-23

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