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EP0080924A1 - Miniature circuit breaker with two juxtaposed extinguishing chambers - Google Patents

Miniature circuit breaker with two juxtaposed extinguishing chambers Download PDF

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Publication number
EP0080924A1
EP0080924A1 EP82402118A EP82402118A EP0080924A1 EP 0080924 A1 EP0080924 A1 EP 0080924A1 EP 82402118 A EP82402118 A EP 82402118A EP 82402118 A EP82402118 A EP 82402118A EP 0080924 A1 EP0080924 A1 EP 0080924A1
Authority
EP
European Patent Office
Prior art keywords
chamber
circuit breaker
contact
chambers
extending
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
EP82402118A
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German (de)
French (fr)
Other versions
EP0080924B1 (en
Inventor
Rémi Bessy
Alain Bruno
François Raynaud
Jean-Pierre Roulet-Dubonnet
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0080924A1 publication Critical patent/EP0080924A1/en
Application granted granted Critical
Publication of EP0080924B1 publication Critical patent/EP0080924B1/en
Expired 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
    • H01H9/46—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

  • French patent application No. 80 26166 of 9-12-1980 describes a circuit breaker of the type mentioned with significant breaking capacity.
  • the object of the present invention is to improve this circuit breaker and it is based on the observation that interactions between the two arcs in the arcing chambers are inevitable. These interactions generate an unstable equilibrium, which quickly translates by a repulsion between the two arcs which slows the movement of one of the arcs towards the breaking chamber.
  • the circuit breaker according to the invention is characterized in that said formation chambers are symmetrical with respect to said median plane, each of said fixed horns extending rectilinear between the fixed contact and the end of the sheet attached to the bottom in the associated training to limit the length of the fixed horn in the training chamber.
  • the shortening of the arc horn implies a limitation of the elongation of the arc in the formation chamber but this limitation is authorized by the arc tension increased by the two arcs in series and the restricted volume of the chamber. training. Tests have confirmed the rapid and simultaneous movement of the two arcs towards the breaking chambers.
  • the re-ignition point between the two contacts is transferred towards the interior of the formation chamber in an area remote from the contacts where the arc blowing loop is well formed and where the action blowing gasogenic cheeks confining the chamber is notable.
  • a decompression chamber is provided at the rear of the fixed horn between the latter and the wall of the case, this chamber advantageously communicating with the breaking chamber.
  • the casing 10 consists of two half-shells 12, 14 and the lower part of which, adjacent to the bottom 16, is subdivided by an insulating partition 18, which coats a magnetic metal screen plate 20.
  • an insulating partition 18 which coats a magnetic metal screen plate 20.
  • On either side of the partition 18 are arranged two interrupting chambers 22, 24 with deionization plates 26 and at the front of these chambers 22, 24 two arcing chambers 28, 30, of which only the chamber 28 is visible in the drawings.
  • a movable contact 32 in the form of a fork straddles the partition 18 and each of its ends cooperates with a fixed contact 34.
  • the movement of the movable contact 32 is controlled by a mechanism 36 with lever 38 for manual control and with automatic magnetic release 40 and thermal 42, which occupies the entire volume of the housing 10 above the partition 18.
  • a mechanism 36 with lever 38 for manual control and with automatic magnetic release 40 and thermal 42 which occupies the entire volume of the housing 10 above the partition 18.
  • the interrupting chambers 22, 24 and the formation chambers 28, 30 are symmetrical and the latter each comprise a rectilinear fixed horn 44 which extends in a straight line between the fixed contact 34 and the end 46 of the sheet 26 of the cutting chamber attached to the bottom 16.
  • the width of the fixed horn 44 corresponds substantially to the thickness of the forming chamber 28, 30 and at the rear of the horn 44 is provided , between the inner wall of the housing 10 and the horn 44, detached from this wall, a decompression chamber 48.
  • the movable contact 32 is extended by a movable horn 50 of limited length which extends substantially parallel to the fixed horn-44 .
  • the forming chamber 28, 30 is delimited laterally by a cheek 52 advantageously made of a gas-generating material, which extends to the entrance of the cutting chamber 22, 24 and is detached from the side wall of the housing 10 to create a gas exhaust interval from the cutting chamber to the decompression chamber 48 through a cutout 54 of the cheek 52.
  • a similar exhaust can be provided at the rear of the contacts 32, 34 in the usual manner.
  • the arrangement of the formation chamber 30 arranged at the rear of the plane of FIG. 1 is exactly identical to that of the chamber 28.
  • the current flows through one of the fixed contacts 34 connected to the input terminal (not shown), by the movable contact in the fork 32, the other fixed contact 34, the magnetic trip device 40 and the thermal trip device 42 to exit through the opposite terminal (not shown).
  • the movable contact 32 pivots towards the opening position shown in broken lines by drawing an arc in each of the formation chambers 28, 30.
  • the two arcs are connected in series and crossed by currents of opposite.
  • Each of the arcs moves on the fixed horn 44 and the mobile horn 50 under the effects of loop and attraction of the breaking chamber 22, 24 into which it penetrates.
  • the beginning of the displacement of the arc is very rapid because the horns 44; 50 are practically parallel and do not cause an elongation of the arc.
  • the very short length and the continuity of the horn 44 favor the continuation of this ra ra pide and penetration of the arc into the breaking chamber where it is maintained by the electromagnetic forces of the sheets 26 and extinguished.
  • the two arcs move symmetrically and at the same time each penetrate into the corresponding breaking chamber.
  • the volume 48 released by the reduction in the volume of the training chamber 28.30 is used as the decompression volume to avoid any braking of the arc by an overpressure or a gas plug.
  • the cooling of the horn 44 subjected to the action of the arc is also improved.
  • a possible re-ignition takes place inside the formation chamber 28,30 where the displacement of the arc towards the breaking chamber is facilitated.
  • the limited volume of the formation chambers 28, 30 and the existence of two arcs in series confer sufficient arc tension in the formation chambers despite the slight elongation resulting from the oblique arrangement of the fixed horn 44.
  • the rapid displacement of the arcs in the formation chambers 28, 30 minimizes the interaction between these arcs capable of slowing the entry of one of the arcs into the breaking chamber.
  • the fixed horn 44 extends along the shortest path between the fixed contact and the entrance to the breaking chamber, but it is clear that it would not be departing from the scope of the present invention to adopt a slightly different shape.
  • the circuit breaker may include other means, well known to specialists, promoting the displacement of the arc towards the breaking chamber.

Landscapes

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

Abstract

1. Miniature circuit breaker with high rupture capacity with a narrow insulating housing (10) comprising : - two juxtaposed extinguishing chambers (22, 24) located in the lower part of the housing and comprising a stacking of deionization plates (26) extending parallelly to the bottom (16) of the housing and enclosed by end plates one of which comes into abutment with the bottom (16), the two chambers being separated by an insulating wall (18) extending in the median line of the housing perpendicularly to said bottom (16), - two pairs of contacts (32, 34) each associated to one of said extinguishing chambers and located in an arcing chamber (28) in front of said plates (18) near the end plate opposite the bottom (16), the movable contact (32) moving between a closed contact position with a stationary contact (34) and an open position adjacent to said opposite end plate, in order to draw an initial arc extending parallelly to the plates (26) and pivoting by migration on a stationary horn (44) in order to spread out at the entrance of the chamber perpendicularly to the plates, - a contact carrier (32) in the form of a fork bridging said wall (18) and carrying at the end of each prong a movable contact, in order to move simultaneously said movable contacts when drawin two arcs extending parallelly and being flown through by currents of opposite directions, and to constitute a contact bridge with two series breaking intervals, - a control mechanism (36) of the fork-shaped carrier to open and close manually and/or automatically said circuit breaker, said arcing chambers (28) being symmetric with regard to the median line, each of said stationary horns (44) extending in rectilinear manner between the stationary contact (34) and the end (46) of the plate coupled with the bottom (16) in the associated arcing chamber (28), in order to limit the length of the stationary horn (44) in the arcing chamber, and a flow passage (54) disposed between the wall of the housing (10) and a lateral cheek (52) of delimitation of the arcing chamber (28) provoking communication between the extinguishing chamber (22) and a decompression enclosure (48) confined at the rear of the stationary horn (44).

Description

L'invention est relative à un disjoncteur miniature à haut pouvoir de coupure ayant un boîtier moulé étroit comprenant:

  • - deux chambres de coupure disposées côte-à-côte dans la partie inférieure du boîtier et ayant un empilage de tôles de désionisation s'étendant parallèlement au fond du boitier et encadré par des tôles d'extrémité dont l'une est accolée au fond, les deux chambres étant séparées par une cloison isolante s'étendant dans le plan médian du boîtier perpendiculaire audit fond,
  • - deux paires de contacts, chacune associée à l'une desdites chambres de coupure en étant disposée dans une chambre de formation d'arc devant lesdites tôles sensiblement au niveau de la tôle d'extrémité opposée au fond, le contact mobile se débattant entre une position fermé de contact avec un contact fixe et une position ouvert adjacente à ladite tôle d'extrémité opposée, de manière à tirer un arc initial s'étendant parallèlement aux tôles et pivotant par migration sur une corne fixe pour s'étaler à l'entrée de la chambre perpendiculairement aux tôles,
  • - un support de contacts en forme de fourche chevauchant ladite cloison et portant à l'extrémité de chacune de ses dents un contact mobile, de façon à déplacer simultanément lesdits contacts mobiles en tirant deux arcs s'étendant parallèlement en étant parcourus par des courants de sens opposés et constituer un pont de contact à deux intervalles de coupure connectés en'série,
  • - un mécanisme de commande manuelle et/ou automatique dudit support en fourche pour ouvrir et fermer ledit disjoncteur.
The invention relates to a miniature circuit breaker with high breaking capacity having a narrow molded case comprising:
  • - two interrupting chambers arranged side by side in the lower part of the housing and having a stack of deionization sheets extending parallel to the bottom of the case and framed by end sheets, one of which is attached to the bottom, the two chambers being separated by an insulating partition extending in the median plane of the housing perpendicular to said bottom,
  • - two pairs of contacts, each associated with one of said interrupting chambers being arranged in an arc-forming chamber in front of said sheets substantially at the level of the end sheet opposite the bottom, the movable contact struggling between a closed position of contact with a fixed contact and an open position adjacent to said opposite end sheet, so as to draw an initial arc extending parallel to the sheets and pivoting by migration on a fixed horn to spread at the entry of the chamber perpendicular to the sheets,
  • - a fork-shaped contact support straddling said partition and carrying a movable contact at the end of each of its teeth, so as to simultaneously move said movable contacts by drawing two arcs extending in parallel while being traversed by currents of opposite directions and constitute a contact bridge with two cut-off intervals connected in series,
  • - A mechanism for manual and / or automatic control of said fork support to open and close said circuit breaker.

La demande de brevet français N° 80 26166 du 9-12-1980 décrit un disjoncteur du genre mentionné à pouvoir de coupure important. La présente invention a pour but de perfectionner ce disjoncteur et elle est basée sur la constatation que des interactions entre les deux arcs dans les chambres de formation d'arc sont inévitables. Ces interactions engendrent un équilibre instable, qui se traduit rapidement par une répulsion entre les deux arcs qui freine le déplacement de l'un des arcs vers la chambre de coupure.French patent application No. 80 26166 of 9-12-1980 describes a circuit breaker of the type mentioned with significant breaking capacity. The object of the present invention is to improve this circuit breaker and it is based on the observation that interactions between the two arcs in the arcing chambers are inevitable. These interactions generate an unstable equilibrium, which quickly translates by a repulsion between the two arcs which slows the movement of one of the arcs towards the breaking chamber.

Le disjoncteur selon l'invention est caractérisé par le fait que lesdites chambres de formation sont symétriques par rapport audit plan médian, chacune desdites cornes fixes s'étendant rectiligne entre le contact fixe et l'extrémité de la tôle accolée au fond dans la chambre de formation associée pour limiter la longueur de la corne fixe dans la chambre de formation.The circuit breaker according to the invention is characterized in that said formation chambers are symmetrical with respect to said median plane, each of said fixed horns extending rectilinear between the fixed contact and the end of the sheet attached to the bottom in the associated training to limit the length of the fixed horn in the training chamber.

La réduction de la longueur des cornes fixes et leur continuité favorisent une montée rapide des arcs dans les chambres de coupure où ils sont maintenus par les effets électromagnétiques prépondérants. Le raccourcissement de la corne d'arc implique une limitation de l'allongement de l'arc dans la chambre de formation mais cette limitation est autorisée par la tension d'arc accrue par les deux arcs en série et le volume restreint de la chambre de formation. Des essais ont confirmé le déplacement rapide et simultané des deux arcs vers les chambres de coupure.The reduction in the length of the fixed horns and their continuity favor a rapid rise of the arcs in the breaking chambers where they are maintained by the preponderant electromagnetic effects. The shortening of the arc horn implies a limitation of the elongation of the arc in the formation chamber but this limitation is authorized by the arc tension increased by the two arcs in series and the restricted volume of the chamber. training. Tests have confirmed the rapid and simultaneous movement of the two arcs towards the breaking chambers.

Selon un développement de l'invention, le point de réamorçage entre les deux contacts est reporté vers l'intérieur de la chambre de formation dans une zone éloignée des contacts où la boucle de soufflage de l'arc est bien formée et où l'action de soufflage des joues gazogènes confinant la chambre est notable.According to a development of the invention, the re-ignition point between the two contacts is transferred towards the interior of the formation chamber in an area remote from the contacts where the arc blowing loop is well formed and where the action blowing gasogenic cheeks confining the chamber is notable.

Selon un autre développement de l'invention, une chambre de décompression est ménagée à l'arrière de la corne fixe entre cette dernière et la paroi du boitier, cette chambre communiquant avantageusement avec la chambre de coupure. En décollant la corne du boîtier on favorise également son refroidissement. La communication s'effectue par exemple l'intervalle ménagé entre la joue de soufflage et la paroi latérale du boîtier qui évite également toute dépression à l'arrière de l'arc d'une manière bien connue des spécialistes.According to another development of the invention, a decompression chamber is provided at the rear of the fixed horn between the latter and the wall of the case, this chamber advantageously communicating with the breaking chamber. By removing the horn from the housing, it also promotes its cooling. Communication takes place, for example, the gap between the blowing cheek and the side wall of the housing which also prevents any depression at the rear of the arc in a manner well known to specialists.

D'autres avantages et caractéristiques de l'invention ressortiront plus clairement de la description qui va suivre d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple non limitatif et représenté aux dessins annexés, dans lesquels :

  • la figure 1 est une vue schématique en élévation d'un disjoncteur selon l'invention, représenté en position fermée, la paroi latérale du boîtier étant supposée enlevée et la position ouverte du contact étant esquissée en trait discontinu;
  • la figure 2 est une coupe suivant la ligne II-II de la figure 1.
Other advantages and characteristics of the invention will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and shown in the appended drawings, in which:
  • Figure 1 is a schematic elevational view of a circuit breaker according to the invention, shown in the closed position, the side wall of the housing being assumed removed and the open position of the contact being sketched in broken lines;
  • Figure 2 is a section along line II-II of Figure 1.

Sur les figures, qui correspondent pratiquement aux figures 1 et 2 du brevet précité, on reconnaît le boîtier 10 constitué par deux demi-coquilles 12, 14 et dont la partie inférieure adjacente au fond 16 est subdivisée par une cloison isolante 18, qui enrobe une plaque écran métallique magnétique 20. De part et d'autre de la cloison 18 sont disposées deux chambres de coupure 22, 24 à tôles de désionisation 26 et à l'avant de ces chambres 22, 24 deux chambres de formation d'arc 28, 30, dont seule la chambre 28 est visible sur les dessins. Un contact mobile 32 en forme de fourche chevauche la cloison 18 et chacune de ses extrémités coopère avec un contact - fixe 34. Le déplacement du contact mobile 32 est commandé par un mécanisme 36 à manette 38 de commande manuelle et à déclencheur automatique magnétique 40 et thermique 42, qui occupe tout le volume du boîtier 10 au-dessus de la cloison 18. On se reportera avantageusement au brevet français précité pour de plus amples détails sur la structure et le fonctionnement de ce disjoncteur.In the figures, which correspond practically to FIGS. 1 and 2 of the aforementioned patent, the casing 10 consists of two half-shells 12, 14 and the lower part of which, adjacent to the bottom 16, is subdivided by an insulating partition 18, which coats a magnetic metal screen plate 20. On either side of the partition 18 are arranged two interrupting chambers 22, 24 with deionization plates 26 and at the front of these chambers 22, 24 two arcing chambers 28, 30, of which only the chamber 28 is visible in the drawings. A movable contact 32 in the form of a fork straddles the partition 18 and each of its ends cooperates with a fixed contact 34. The movement of the movable contact 32 is controlled by a mechanism 36 with lever 38 for manual control and with automatic magnetic release 40 and thermal 42, which occupies the entire volume of the housing 10 above the partition 18. Advantageously refer to the aforementioned French patent for further details on the structure and operation of this circuit breaker.

Selon la présente invention, les chambres de coupure 22, 24 et les chambres de formation 28, 30 sont symétriques et ces dernières comportent chacune une corne fixe 44 rectiligne qui s'étend en ligne droite entre le contact fixe 34 et l'extrémité 46 de la tôle 26 de la chambre de coupure accolée au fond 16. La largeur de la corne fixe 44 correspond sensiblement à l'épaisseur de la chambre de formation 28, 30 et à l'arrière de la corne 44 est ménagée, entre la paroi interne du boîtier 10 et la corne 44, décollée de cette paroi, une chambre de décompression 48. Le contact mobile 32 se prolonge par une corne mobile 50 de longueur limitée qui s'étend sensiblement parallèlement à la corne fixe-44. La chambre de formation 28, 30 est délimitée latéralement par une joue 52 avantageusement en un matériau gazogène, qui s'étend jusqu'à l'entrée de la chambre de coupure 22, 24 et est décollée de la paroi latérale du boîtier 10 pour créer un intervalle d'échappement de gaz de la chambre de coupure vers la chambre de décompression 48 à travers une découpe 54 de la joue 52. Un échappement analogue peut être prévu à l'arrière des contacts 32, 34 de la manière usuelle. L'agencement de la chambre de formation 30 disposée à l'arrière du plan de la figure 1 est exactement identique à celui de la chambre 28.According to the present invention, the interrupting chambers 22, 24 and the formation chambers 28, 30 are symmetrical and the latter each comprise a rectilinear fixed horn 44 which extends in a straight line between the fixed contact 34 and the end 46 of the sheet 26 of the cutting chamber attached to the bottom 16. The width of the fixed horn 44 corresponds substantially to the thickness of the forming chamber 28, 30 and at the rear of the horn 44 is provided , between the inner wall of the housing 10 and the horn 44, detached from this wall, a decompression chamber 48. The movable contact 32 is extended by a movable horn 50 of limited length which extends substantially parallel to the fixed horn-44 . The forming chamber 28, 30 is delimited laterally by a cheek 52 advantageously made of a gas-generating material, which extends to the entrance of the cutting chamber 22, 24 and is detached from the side wall of the housing 10 to create a gas exhaust interval from the cutting chamber to the decompression chamber 48 through a cutout 54 of the cheek 52. A similar exhaust can be provided at the rear of the contacts 32, 34 in the usual manner. The arrangement of the formation chamber 30 arranged at the rear of the plane of FIG. 1 is exactly identical to that of the chamber 28.

En position fermée du disjoncteur représentée en trait continu sur la figure 1, le courant passe par l'un des contacts fixes 34 raccordé à la borne d'entrée (non représentée), par le contact mobile en fourche 32, l'autre contact fixe 34, le déclencheur magnétique 40 et le déclencheur thermique 42 pour sortir par la borne opposée (non représentée). Lors d'une manoeuvre d'ouverture le contact mobile 32 pivote vers la position d'ouverture représentée en trait discontinu en tirant un arc dans chacune des chambres de formation 28, 30. Les deux arcs sont connectés en série et traversés par des courants de sens opposé. Chacun des arcs se déplace sur la corne fixe 44 et la corne mobile 50 sous les effets de boucle et d'attraction de la chambre de coupure 22, 24 dans laquelle il pénètre. L'amorce du déplacement de l'arc est très rapide car les cornes 44; 50 sont pratiquement parallèles et ne provoquent pas un allongement de l'arc. La très courte longueur et la continuité de la corne 44 favorisent la poursuite de ce déplacement rapide et la pénétration de l'arc dans la chambre de coupure où il est maintenu par les forces électromagnétiques des tôles 26 et éteint. Les deux arcs se déplacent symétriquement et pénètrent en même temps chacun dans la chambre de coupure correspondante. Le volume 48 libéré par la diminution du volume de la chambre de formation 28,30 est utilisé comme volume de décompression pour éviter tout freinage de l'arc par une surpression ou un bouchon gazeux. Le refroidissement de la corne 44 soumise à l'action de l'arc est également amélioré. Un éventuel réamorçage s'effectue à l'intérieur de la chambre de formation 28,30 où le déplacement de l'arc vers la chambre de coupure est facilité. Le volume restreint des chambres de formation 28, 30 et l'existence de deux arcs en série confèrent une tension d'arc suffisante dans les chambres de formation malgré le faible allongement résultant de la disposition oblique de la corne fixe 44. Le déplacement rapide des arcs dans les chambres de formation 28, 30 minimise l'interaction entre ces arcs susceptible de freiner l'entrée de l'un des arcs dans la chambre de coupure. La corne fixe 44 s'étend suivant le chemin le plus court entre le contact fixe et l'entrée de la chambre de coupure, mais il est clair qu'on ne sortirait pas du cadre de la présente invention en adoptant une forme légèrement différente. Le disjoncteur peut comporter d'autres moyens, bien connus des spécialistes, favorisant le déplacement de l'arc vers la chambre de coupure.In the closed position of the circuit breaker shown in solid line in Figure 1, the current flows through one of the fixed contacts 34 connected to the input terminal (not shown), by the movable contact in the fork 32, the other fixed contact 34, the magnetic trip device 40 and the thermal trip device 42 to exit through the opposite terminal (not shown). During an opening operation, the movable contact 32 pivots towards the opening position shown in broken lines by drawing an arc in each of the formation chambers 28, 30. The two arcs are connected in series and crossed by currents of opposite. Each of the arcs moves on the fixed horn 44 and the mobile horn 50 under the effects of loop and attraction of the breaking chamber 22, 24 into which it penetrates. The beginning of the displacement of the arc is very rapid because the horns 44; 50 are practically parallel and do not cause an elongation of the arc. The very short length and the continuity of the horn 44 favor the continuation of this ra ra pide and penetration of the arc into the breaking chamber where it is maintained by the electromagnetic forces of the sheets 26 and extinguished. The two arcs move symmetrically and at the same time each penetrate into the corresponding breaking chamber. The volume 48 released by the reduction in the volume of the training chamber 28.30 is used as the decompression volume to avoid any braking of the arc by an overpressure or a gas plug. The cooling of the horn 44 subjected to the action of the arc is also improved. A possible re-ignition takes place inside the formation chamber 28,30 where the displacement of the arc towards the breaking chamber is facilitated. The limited volume of the formation chambers 28, 30 and the existence of two arcs in series confer sufficient arc tension in the formation chambers despite the slight elongation resulting from the oblique arrangement of the fixed horn 44. The rapid displacement of the arcs in the formation chambers 28, 30 minimizes the interaction between these arcs capable of slowing the entry of one of the arcs into the breaking chamber. The fixed horn 44 extends along the shortest path between the fixed contact and the entrance to the breaking chamber, but it is clear that it would not be departing from the scope of the present invention to adopt a slightly different shape. The circuit breaker may include other means, well known to specialists, promoting the displacement of the arc towards the breaking chamber.

Claims (7)

1. Disjoncteur miniature à haut pouvoir de coupure ayant un boîtier moulé (10) étroit comprenant : - deux chambres de coupure (22, 24) disposées côte-à-côte dans la partie inférieure du boitier et ayant un empilage de tôles de désionisation (26) s'étendant parallèlement au fond (16) du boitier, et encadré par des tôles d'extrémité dont l'une est accolée au fond (16), les deux chambres étant séparées par une cloison isolante (18) s'étendant dans le plan médian du boîtier perpendiculaire audit fond (16), - deux paires de contacts (32, 34), chacune associée à l'une desdites chambres de coupure en étant disposée dans une chambre de formation d'arc (28,30) devant lesdites tôles (18) sensiblement au niveau de la tôle d'extrémité opposée au fond (16), le contact mobile (32) se-débattant entre une position fermé de contact avec un contact fixe (34) et une position ouvert adjacente à ladite tôle d'extrémité opposée, de manière à tirer un arc initial s'étendant parallèlement aux tôles (26) et pivotant par migration sur une corne fixe (44) pour s'étaler à l'entrée de la chambre perpendiculairement aux tôles, - un support de contacts (32) en forme de fourche chevauchant ladite cloison (18) et portant à l'extrémité de chacune de ses dents un contact mobile, de façon à déplacer simultanément lesdits contacts mobiles, en tirant deux arcs s'étendant parallèlement en étant parcourus par des courants de sens opposés et constituer un pont de contact à deux intervalles de coupure connectés en série, - un mécanisme (36) de commande manuelle et/ou automatique dudit support en fourche pour ouvrir et fermer ledit disjoncteur,
caractérisé par le fait que lesdites chambres de formation (28,30) sont symétriques par rapport. audit plan médian, chacune desdites cornes fixes (44) s'étendant rectiligne entre le contact fixe (34) et l'extrémité (46) de la tôle accolée au fond (16) dans la chambre de formation associée pour limiter la longueur de la corne fixe (44) dans la chambre de formation.1. Miniature circuit breaker with high breaking capacity having a narrow molded case (10) comprising: - two breaking chambers (22, 24) arranged side by side in the lower part of the housing and having a stack of deionization sheets (26) extending parallel to the bottom (16) of the housing, and framed by sheets one end of which is attached to the bottom (16), the two chambers being separated by an insulating partition (18) extending in the median plane of the housing perpendicular to said bottom (16), - two pairs of contacts (32, 34), each associated with one of said breaking chambers by being arranged in an arc-forming chamber (28, 30) in front of said sheets (18) substantially at the level of the sheet d end opposite to the bottom (16), the movable contact (32) struggling between a closed position of contact with a fixed contact (34) and an open position adjacent to said opposite end plate, so as to draw an arc initial extending parallel to the sheets (26) and pivoting by migration on a fixed horn (44) to spread at the entrance to the chamber perpendicular to the sheets, - a contact support (32) in the form of a fork overlapping said partition (18) and carrying at the end of each of its teeth a movable contact, so as to simultaneously move said movable contacts, by drawing two arcs extending parallel being traversed by currents in opposite directions and constituting a contact bridge with two cut-off intervals connected in series, a mechanism (36) for manual and / or automatic control of said fork support for opening and closing said circuit breaker,
characterized in that said formation chambers (28,30) are symmetrical with respect to. to said median plane, each of said fixed horns (44) extending rectilinear between the fixed contact (34) and the end (46) of the sheet attached to the bottom (16) in the associated formation chamber to limit the length of the fixed horn (44) in the formation chamber. 2. Disjoncteur selon la revendication 1, caractérisé par le fait que le contact mobile (32) se prolonge par une corne (50) s'étendant en position fermé parallèlement à la corne fixe (44) pour faciliter le transfert de l'arc dans la chambre de coupure (22, 24) et constituer une zone de réamorçage de l'arc à l'intérieur de la chambre de formation (28), ladite zone étant éloignée des contacts.2. Circuit breaker according to claim 1, characterized in that the movable contact (32) is extended by a horn (5 0 ) extending in the closed position parallel to the fixed horn (44) to facilitate the transfer of the arc in the breaking chamber (22, 24) and constitute a zone for re-striking the arc inside the formation chamber (28), said zone being distant from the contacts. 3. Disjoncteur selon la revendication 1 ou 2, caractérisé par un écran métallique magnétique (20) intercalé entre les deux chambres de coupure (22, 24) et se prolongeant entre les deux chambres de formation d'arc (28, 30) pour limiter l'interaction entre les deux arcs.3. Circuit breaker according to claim 1 or 2, characterized by a magnetic metallic screen (20) interposed between the two breaking chambers (22, 24) and extending between the two arcing chambers (28, 30) to limit the interaction between the two arcs. 4. Disjoncteur selon la revendication 1, 2 ou 3, caractérisé en ce que ladite corne fixe délimite un compartiment de décompression (48) à l'arrière de la corne fixe (44).4. Circuit breaker according to claim 1, 2 or 3, characterized in that said fixed horn delimits a decompression compartment (48) at the rear of the fixed horn (44). 5. Disjoncteur selon la revendication 4, caractérisé en ce qu'un conduit (54) d'écoulement de gaz fait communiquer la chambre de coupure (22) et le compartiment de décompression (48).5. Circuit breaker according to claim 4, characterized in that a gas flow conduit (54) communicates the breaking chamber (22) and the decompression compartment (48). 6. Disjoncteur selon la revendication 5, caractérisé en ce que ledit conduit d'écoulement (54) est ménagé entre la paroi du boltier (10) et une joue (52) latérale de délimitation de la chambre de formation (28).6. Circuit breaker according to claim 5, characterized in that said flow conduit (54) is formed between the wall of the bolt (10) and a side cheek (52) delimiting the formation chamber (28). 7. Disjoncteur selon la revendication 6, caractérisé en ce que ladite joue latérale (52) est en un matériau gazogène.7. Circuit breaker according to claim 6, characterized in that said lateral cheek (52) is made of a gas-generating material.
EP19820402118 1981-11-27 1982-11-22 Miniature circuit breaker with two juxtaposed extinguishing chambers Expired EP0080924B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8122465 1981-11-27
FR8122465A FR2517465B1 (en) 1981-11-27 1981-11-27 MINIATURE CIRCUIT BREAKER WITH TWO ADJUSTED SWITCHING CHAMBERS

Publications (2)

Publication Number Publication Date
EP0080924A1 true EP0080924A1 (en) 1983-06-08
EP0080924B1 EP0080924B1 (en) 1985-08-21

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EP19820402118 Expired EP0080924B1 (en) 1981-11-27 1982-11-22 Miniature circuit breaker with two juxtaposed extinguishing chambers

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EP (1) EP0080924B1 (en)
DE (1) DE3265659D1 (en)
FR (1) FR2517465B1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2557354A1 (en) * 1983-12-26 1985-06-28 Merlin Gerin MINIATURE CIRCUIT BREAKER WITH IMPROVED DIELECTRIC HOLD
FR2613125A1 (en) * 1987-03-26 1988-09-30 Merlin Gerin Contact piece of a miniature circuit breaker and method of manufacturing such a piece from a bimetallic strip
EP0345412A2 (en) * 1988-06-09 1989-12-13 Electric Power Research Institute, Inc Remotely controllable circuit breaker with improved arc drive structure
EP1085552A1 (en) * 1999-09-16 2001-03-21 General Electric Company Improved arcing contact arrangement
EP1282146A1 (en) * 2001-07-31 2003-02-05 Legrand Arc extinguishing device
KR100743128B1 (en) * 1998-03-19 2007-07-27 고나미 가부시키가이샤 Image processing method, video game apparatus and storage medium
CN104992861A (en) * 2015-07-24 2015-10-21 北京明日电器设备有限责任公司 Arc extinguishing cover of dual-power supply automatic transfer switch
CN105097332A (en) * 2015-09-22 2015-11-25 北京明日电器设备有限责任公司 Arc extinguishing cover with protective parts for dual-power supply automatic change-over switch
CN105374595A (en) * 2015-07-24 2016-03-02 北京明日电器设备有限责任公司 Contact arc-extinguishing system used for dual-power-supply automatic changeover switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750795B1 (en) * 1996-07-05 1998-09-25 Schneider Electric Sa SWITCHING DEVICE FOR A HIGH-CALIBER ELECTRIC CIRCUIT BREAKER

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB745755A (en) * 1953-07-23 1956-02-29 Ferguson Pailin Ltd Improvements in or relating to air-break electric switches or circuit breakers
US2769066A (en) * 1953-02-02 1956-10-30 Westinghouse Electric Corp Circuit interrupters
FR2154628A1 (en) * 1971-09-30 1973-05-11 Maier & Cie C
EP0053973A1 (en) * 1980-12-09 1982-06-16 Merlin Gerin Miniature circuit breaker with high rupture capacity
FR2975290A1 (en) * 2011-05-20 2012-11-23 Oreal DECAYING COMPOSITION OF KERATIN FIBERS IN THE FORM OF TABLET WITH PERSULFATE AND A PARTICULAR POLYMER

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475290A1 (en) * 1980-01-31 1981-08-07 Merlin Gerin Electrode chamber for LV isolating switch - has two-part arc guide plates and parallel metallic deionising electrodes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2769066A (en) * 1953-02-02 1956-10-30 Westinghouse Electric Corp Circuit interrupters
GB745755A (en) * 1953-07-23 1956-02-29 Ferguson Pailin Ltd Improvements in or relating to air-break electric switches or circuit breakers
FR2154628A1 (en) * 1971-09-30 1973-05-11 Maier & Cie C
EP0053973A1 (en) * 1980-12-09 1982-06-16 Merlin Gerin Miniature circuit breaker with high rupture capacity
FR2975290A1 (en) * 2011-05-20 2012-11-23 Oreal DECAYING COMPOSITION OF KERATIN FIBERS IN THE FORM OF TABLET WITH PERSULFATE AND A PARTICULAR POLYMER

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2557354A1 (en) * 1983-12-26 1985-06-28 Merlin Gerin MINIATURE CIRCUIT BREAKER WITH IMPROVED DIELECTRIC HOLD
EP0148058A2 (en) * 1983-12-26 1985-07-10 Merlin Gerin Miniature circuit breaker with improved dielectric characteristics
EP0148058A3 (en) * 1983-12-26 1985-08-14 Merlin Gerin Miniature circuit breaker with improved dielectric characteristics
FR2613125A1 (en) * 1987-03-26 1988-09-30 Merlin Gerin Contact piece of a miniature circuit breaker and method of manufacturing such a piece from a bimetallic strip
EP0345412A2 (en) * 1988-06-09 1989-12-13 Electric Power Research Institute, Inc Remotely controllable circuit breaker with improved arc drive structure
EP0345412A3 (en) * 1988-06-09 1990-08-01 Electric Power Research Institute, Inc Remotely controllable circuit breaker with improved arc drive structure
KR100743128B1 (en) * 1998-03-19 2007-07-27 고나미 가부시키가이샤 Image processing method, video game apparatus and storage medium
EP1085552A1 (en) * 1999-09-16 2001-03-21 General Electric Company Improved arcing contact arrangement
FR2828329A1 (en) * 2001-07-31 2003-02-07 Legrand Sa DEVICE FOR EXTINGUISHING AN ELECTRIC ARC
EP1282146A1 (en) * 2001-07-31 2003-02-05 Legrand Arc extinguishing device
CN104992861A (en) * 2015-07-24 2015-10-21 北京明日电器设备有限责任公司 Arc extinguishing cover of dual-power supply automatic transfer switch
CN105374595A (en) * 2015-07-24 2016-03-02 北京明日电器设备有限责任公司 Contact arc-extinguishing system used for dual-power-supply automatic changeover switch
CN104992861B (en) * 2015-07-24 2017-12-08 北京明日电器设备有限责任公司 A kind of arc-extinguish chamber of double power supply automatic transfer switch
CN105374595B (en) * 2015-07-24 2018-09-18 北京明日电器设备有限责任公司 Contact arc-extinguishing system for double power supply automatic transfer switch
CN105097332A (en) * 2015-09-22 2015-11-25 北京明日电器设备有限责任公司 Arc extinguishing cover with protective parts for dual-power supply automatic change-over switch
CN105097332B (en) * 2015-09-22 2017-09-26 北京明日电器设备有限责任公司 A kind of double power supply automatic transfer switch arc-extinguish chamber with guard member

Also Published As

Publication number Publication date
EP0080924B1 (en) 1985-08-21
FR2517465B1 (en) 1986-05-02
FR2517465A1 (en) 1983-06-03
DE3265659D1 (en) 1985-09-26

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