EP0206882A1 - Low voltage circuit breaker with interruption - Google Patents

Low voltage circuit breaker with interruption Download PDF

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Publication number
EP0206882A1
EP0206882A1 EP86401190A EP86401190A EP0206882A1 EP 0206882 A1 EP0206882 A1 EP 0206882A1 EP 86401190 A EP86401190 A EP 86401190A EP 86401190 A EP86401190 A EP 86401190A EP 0206882 A1 EP0206882 A1 EP 0206882A1
Authority
EP
European Patent Office
Prior art keywords
contacts
arc
chamber
movable
circuit breaker
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
EP86401190A
Other languages
German (de)
French (fr)
Other versions
EP0206882B1 (en
Inventor
Jean-Philippe Neel
Jean-Pierre Trahin
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
Priority to AT86401190T priority Critical patent/ATE56305T1/en
Publication of EP0206882A1 publication Critical patent/EP0206882A1/en
Application granted granted Critical
Publication of EP0206882B1 publication Critical patent/EP0206882B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • 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
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc 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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes
    • H01H2009/343—Venting arrangements for arc chutes with variable venting aperture function of arc chute internal pressure, e.g. resilient flap-valve or check-valve
    • 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
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a low-voltage multipole circuit breaker with a molded case according to the preamble of claim 1.
  • the present invention aims to allow the realization of a molded case circuit breaker with improved breaking capacity by particularly simple and effective means, and devoid of arcing contacts.
  • an insulating screen is associated with the movable contacts, so as to confine with the fixed contacts an arc-forming chamber open towards the breaking chamber.
  • the insulating screen notably closes the intervals between the various movable contacts, as well as the gap formed between the insulating partitions delimiting the compartments of the different poles and the adjacent movable contacts.
  • the insulating screen is advantageously a single piece molded from a gas-generating material having slots for passage of the contact arms.
  • the central part of the insulating screen extends parallel to the fixed contacts at a short distance from the latter to delimit an arc-forming chamber of low height.
  • the limited volume of the arc chamber ensures a rapid increase in pressure due to the thermal and gas-generating action of the arc.
  • the compressed gases escape to the breaking chamber by blowing the arc which very quickly leaves the contact area.
  • the rapid initial displacement of the arc also results from a particular conformation of the arc migration tracks constituted by arc horns associated with the contacts.
  • the fixed arcing horn has a boss having a flank parallel to the direction of movement of the movable contact to define a region of small spacing preventing any re-ignition of the arc on the contacts.
  • the arc horns define divergent tracks from the contacts which favor the displacement of the arc which tends to lengthen.
  • the fixed arc horn is preferably made of stainless steel or of refractory material and it extends into the breaking chamber of which it constitutes one of the end plates.
  • the boss of the fixed bow horn limits the initial elongation of the bow in the area adjacent to the contacts.
  • the combined action of the insulating screen and arcing horns allows the creation of a circuit breaker with a simplified active part.
  • the contact fingers are simple copper blades articulated on a common axis carried by a support of movable contacts.
  • the movable contact consists of a patch attached to one of the longitudinal edges of the blade which forms with the front edge the movable arc horn.
  • the breaking chamber comprises deionization plates and according to a development of the invention, the bottom of this chamber is closed by a valve arranged in the deflector of the gases escaping from the chamber.
  • the valve opens automatically when there is a significant overpressure in the chamber, the gases flowing outwards along a baffled route.
  • the valve makes it possible to control the pressure inside the cutting chamber and. ensure extinction of the arc regardless of its intensity.
  • the valve is advantageously constituted by an insulating plate made of a gas-generating material, the side walls of the chamber can also be made of gas-generating material.
  • a low voltage electric circuit breaker comprises a molded case at the bottom 10 and with cover 12 in which is housed a mechanism designated by the general reference 14.
  • the electrical part of the circuit breaker comprises input 16 and output 1 9 terminals , the input terminal 16 being connected to a fixed contact 18 by a conductor 17, attached to the bottom 10 of the molded housing.
  • movable contacts 20 pivotally mounted on an axis 22 carried by a contact support 24, integral with a bar 26 for connection between the different poles of the circuit breaker.
  • Movable contacts 20 are connected by braids 28 to a conductor 30 fixed to the output terminal 19.
  • the conductor 30 constitutes the primary winding of a current transformer 72 in the form of a toroid.
  • Springs 32 interposed between the support 24 and the movable contacts 20, ensure the contact pressure.
  • the mechanism 14 comprises a handle 38 passing through a lumen 40 of the cover 12 and secured to a support 42, pivotally mounted on a fixed axis 44 carried by flanges 46, secured to the molded housing by screws 48.
  • a hook 52 On another fixed axis 50 is articulated a hook 52 whose end 54 cooperates with an attachment 56.
  • the lower link 64 of the toggle joint is articulated on an axis 66 carried by the support 24.
  • a tension spring 68 is anchored on the one hand on the axis 62 of the toggle joint and on the other hand on an axis 70 carried by the support 42 for handle 38.
  • Manual opening of the circuit breaker is controlled by the pivoting of the handle 38 which causes the toggle joint 60, 64 to break, and the movable contacts to move to the open position.
  • the pivoting in the opposite direction of the handle 38 controls the closing of the contacts 18, 20.
  • a tripping circuit advantageously electronic, controls the unlocking of the latching 56, so to release the hook 52.
  • the pivoting of the hook 52 ensures the automatic opening of the contacts 18, 20.
  • the circuit breaker has 3 poles, each housed in a compartment delimited by longitudinal partitions 74 of the molded housing.
  • the 3 poles are identical and only one of them is described below, more particularly with reference to Figures 2 to 5.
  • On the axis 22 of the support 24 are mounted with limited pivoting 5 contact arms 76, each consisting of 2 blades 78 joined and secured, in particular by a movable contact pad 80 welded to the longitudinal edge of the blades 78.
  • the contact arms 76 are extended beyond the hinge axis 22 by a heel 82 cooperating with the support 24 to limit the pivoting of the contact arms 76 anti-clockwise in the figures, under the action of the contact pressure spring 32.
  • the contact pads 80 are fixed in an intermediate part of the blades 78 between the axis 22 and the front end 84 of the blades 78.
  • the front face 84 and the longitudinal edge 86 projecting from the movable contact pad 80 constitutes an arc horn extending opposite a horn d fixed arc 88 associated with fixed contact 18.
  • Contact f ixe 18 comprises a contact area common to all of the movable contacts 20 of the pole and the fixed arcing horn 88 is a plate extending between the fixed contact 18 and the breaking chamber 34 of which it constitutes one of end plates.
  • the fixed arcing horn 88 has, in its part adjacent to the contact 18, a planar part 90 situated in the plane of the fixed contact 18.
  • the planar part 98 is extended by a part folded into a boss 92 having a side extending in the direction of displacement of the movable contact 20.
  • the movable arcing horn 86 forms with the flat part 90 of the horn d 'fixed arc 88 a divergent track oriented towards the breaking chamber 34.
  • the folded part 92 of the fixed arc horn 88 is very close to the front edge 84 of the blades 78. The arc drawn, during separation contacts 18, 20, first moves on the divergent tracks 86, 90, to quickly anchor on the boss 92 and the facing edge 84.
  • the movable contact 20 is associated with a screen 94 made of a gas-forming molded insulating material.
  • the screen 94 consists of three parts, in this case lamellae 96 inserted in the separation intervals of the contact arms 76, a front part 98 extending the front face 84 of the blades 78 and a rear part 100 disposed at the axis 22 of articulation of the contact arms 76.
  • the screen 94 has notches 102 for clipping onto the axis 22, the screen being rigidly or with little play secured to the movable contact 20.
  • the lamella assembly 96 and contact arm 76 forms with the front part 98 of the screen 94 a partition cooperating with little play with ribs 104 provided on the lateral partitions 74.
  • This partition 96, 98 extends in the direction of movement of the movable contact 20 to the rear of the front face 84 of the blades 78.
  • the rear part 100 of the screen 94 cooperates with little play with the lateral partitions 74 and with the bottom 10 of the molded case at the instant of separation contacts 18, 20, for closing the space arranged at the rear re contacts 18, 20.
  • the lower edge 105 of the strips 96 extends substantially parallel to the fixed contact 18 in the closed position of the contacts, slightly retracting the longitudinal edges of the blades 78, carrying the contact pads 80. Referring more particularly in FIG.
  • the contacts 18, 20 are housed in the closed position in a space constituting an arcing chamber, delimited at the bottom by the fixed contact 18 and the wall 10, at the upper part by the blades 78 and the interposed lamellae 96 and in the right part, in FIG. 3 by the part 100 of the screen 94.
  • This arc-forming chamber is open on the side of the breaking chamber 34 by a passage confined by the boss 92 and the front part 98 of the screen 94. It is easy to see that the volume of this arc-forming chamber is low and that an arc drawn during the separation of the contacts 18, 20, causes a rapid increase in pres sion in the formation chamber with a flow of gases to the breaking chamber 34. This gas flow blows the arc towards the chamber 34 forcing it to quickly leave the contacts 18, 20.
  • the gas-generating effect of screen 94 participates in this active blowing of the arc.
  • the combined arc blowing action due to the insulating screen 94 and the configuration of the arcing horns 86, 88, allows the production of a circuit breaker with high breaking capacity, devoid of arcing contacts. . It is clear that the invention is applicable to a mobile contact having a different number of contact arms 76, in particular a single mobile contact arm.
  • the interrupting chamber 34 is closed at its rear part opposite the contacts 18, 20, by a plate or a pair of plates 106, made of an advantageously gas-generating insulating material.
  • the plate 106 is fixed by its upper edge 108 to the carcass of the cutting chamber 34 and it has a certain elasticity or a possibility of pivoting to move away from the ends of the sheets 36 by clearing a passage 110 for exhaust of the gases of the interrupting chamber 34.
  • the interrupting chamber 34 is closed by the plate 106 authorizing a rise in pressure sufficient to extinguish the arc.
  • the rise in pressure causes the plate 106 to deflect, allowing gases to escape and a pressure limitation in the cutting chamber 34.
  • the plate 106 acts as a gas deflector towards the bottom 10 of the molded housing, these gases subsequently escaping through orifices 112, formed in the cover 12.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Control Of Eletrric Generators (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Circuit Breakers (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

A moulded case low voltage circuit breaker for high currents has no arcing contacts and is equipped with arc blow-out means drawing the arc very quickly away from the contacts. An insulating shield associated with the moving contact forms an arc formation chamber of a small volume which is open in the direction of the arc chute. The moving and stationary contacts are fitted with arcing horns constituting a small divergent path in proximity to the contacts favoring rapid displacement of the arc, this divergent path leading to an area defined by a hump of the horn. In this area, the clearance of the arcing horns is smaller than the clearance between the contacts as soon as the latter separate to avoid any rearcing on these contacts.

Description

L'invention est relative à un disjoncteur multipolaire basse tension à boitier moulé selon le préambule de la revendication 1.The invention relates to a low-voltage multipole circuit breaker with a molded case according to the preamble of claim 1.

L'augmentation des puissances installées nécessite des disjoncteurs de protection plus performants, notamment capables de couper des courants de court-circuit de très forte intensité. Les solutions proposées ou actuellement appliquées font appel à des dispositifs compliqués, tels que des contacts d'arc ou des circuits de passage du courant favorisant un soufflage de l'arc.The increase in installed powers requires more efficient protection circuit breakers, in particular capable of breaking very short-circuit currents. The solutions proposed or currently applied call on complicated devices, such as arcing contacts or current flow circuits favoring an arc blowing.

La présente invention a pour but de permettre la réalisation d'un disjoncteur à boîtier moulé à pouvoir de coupure améliorée par des moyens particulièrement simples et efficaces, et dépourvu de contacts d'arc.The present invention aims to allow the realization of a molded case circuit breaker with improved breaking capacity by particularly simple and effective means, and devoid of arcing contacts.

Ce but est atteint par la mise en oeuvre des particularités mentionnées dans la partie caractéristique de la revendication 1.This object is achieved by the implementation of the features mentioned in the characteristic part of claim 1.

On évite ainsi toute stagnation de l'arc sur les contacts et toute érosion de ces derniers due à l'action de l'arc. L'arc quitte très rapidement la zone de contacts et est empêché de revenir dans cette zone, ce qui évite tout risque de détérioration des contacts, qui assurent à la fois le rôle de contacts principaux et de contacts d'arc. La suppression des contacts d'arc limite la zone de contacts et simplifie l'ensemble de l'appareil.This prevents any stagnation of the arc on the contacts and any erosion of the latter due to the action of the arc. The arc leaves the contact zone very quickly and is prevented from returning to this zone, which avoids any risk of deterioration of the contacts, which ensure both the role of main contacts and arcing contacts. Removing arcing contacts limits the contact area and simplifies the entire device.

Selon une première particularité de l'invention, un écran isolant est associé aux contacts mobiles, de manière à confiner avec les contacts fixes une chambre de formation d'arc ouverte vers la chambre de coupure. L'écran isolant obture notamment les intervalles entre les différents contacts mobiles, ainsi que l'intervalle ménagé entre les cloisons isolantes délimitant les compartiments des différents pôles et les contacts mobiles adjacents. L'écran isolant est avantageusement une pièce monobloc moulée en un matériau gazogène ayant des fentes de passage des bras de contact. La partie centrale de l'écran isolant s'étend parallèlement aux contacts fixes à une faible distance de ce dernier pour délimiter une chambre de formation d'arc de faible hauteur. Le volume limité de la chambre de formation d'arc assure une augmentation rapide de la pression due à l'action thermique et gazogène de l'arc. Les gaz comprimés s'échappent vers la chambre de coupure en soufflant l'arc qui quitte très rapidement la zone de contact.According to a first feature of the invention, an insulating screen is associated with the movable contacts, so as to confine with the fixed contacts an arc-forming chamber open towards the breaking chamber. The insulating screen notably closes the intervals between the various movable contacts, as well as the gap formed between the insulating partitions delimiting the compartments of the different poles and the adjacent movable contacts. The insulating screen is advantageously a single piece molded from a gas-generating material having slots for passage of the contact arms. The central part of the insulating screen extends parallel to the fixed contacts at a short distance from the latter to delimit an arc-forming chamber of low height. The limited volume of the arc chamber ensures a rapid increase in pressure due to the thermal and gas-generating action of the arc. The compressed gases escape to the breaking chamber by blowing the arc which very quickly leaves the contact area.

Le déplacement initial rapide de l'arc résulte également d'une conformation particulière des pistes de migration d'arc constituées par des cornes d'arc associées aux contacts. Selon la présente invention, la corne d'arc fixe présente un bossage ayant un flanc parallèle à la direction de déplacement du contact mobile pour définir une zone de faible écartement évitant tout réamorçage de l'arc sur les contacts. Les cornes d'arc définissent des pistes divergentes à partir des contacts qui favorisent le déplacement de l'arc ayant tendance à s'allonger.The rapid initial displacement of the arc also results from a particular conformation of the arc migration tracks constituted by arc horns associated with the contacts. According to the present invention, the fixed arcing horn has a boss having a flank parallel to the direction of movement of the movable contact to define a region of small spacing preventing any re-ignition of the arc on the contacts. The arc horns define divergent tracks from the contacts which favor the displacement of the arc which tends to lengthen.

La corne d'arc fixe est de préférence en acier inoxydable ou en matériau réfractaire et elle se prolonge dans la chambre de coupure dont elle constitue l'une des plaques d'extrémité. Le bossage de la corne d'arc fixe limite l'allongement initial de l'arc dans la zone voisine des contacts.The fixed arc horn is preferably made of stainless steel or of refractory material and it extends into the breaking chamber of which it constitutes one of the end plates. The boss of the fixed bow horn limits the initial elongation of the bow in the area adjacent to the contacts.

L'action combinée de l'écran isolant et des cornes d'arc permet la réalisation d'un disjoncteur à partie active simplifiée. Les doigts de contact sont de simples lames de cuivre articulées sur un axe commun porté par un support de contacts mobiles. Le contact mobile est constitué par une pastille rapportée sur l'une des tranches longitudinales de la lame qui forme avec la tranche frontale la corne d'arc mobile.The combined action of the insulating screen and arcing horns allows the creation of a circuit breaker with a simplified active part. The contact fingers are simple copper blades articulated on a common axis carried by a support of movable contacts. The movable contact consists of a patch attached to one of the longitudinal edges of the blade which forms with the front edge the movable arc horn.

La chambre de coupure comporte des tôles de déionisation et selon un développement de l'invention, le fond de cette chambre est obturé par un clapet agencé en déflecteur des gaz s'échappant de la chambre. Le clapet s'ouvre automatiquement lors d'une surpression importante dans la chambre, les gaz cheminant vers l'extérieur le long d'un parcours en chicane. Le clapet permet de maîtriser la pression à l'intérieur de la chambre de coupure et . d'assurer une extinction de l'arc indépendamment de son intensité. Le clapet est avantageusement constitué par une plaque isolante en un matériau gazogène, les parois latérales de la chambre pouvant également être en matériau gazogène.The breaking chamber comprises deionization plates and according to a development of the invention, the bottom of this chamber is closed by a valve arranged in the deflector of the gases escaping from the chamber. The valve opens automatically when there is a significant overpressure in the chamber, the gases flowing outwards along a baffled route. The valve makes it possible to control the pressure inside the cutting chamber and. ensure extinction of the arc regardless of its intensity. The valve is advantageously constituted by an insulating plate made of a gas-generating material, the side walls of the chamber can also be made of gas-generating material.

D'autres avantages et caractéristiques 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 en coupe longitudinale d'un disjoncteur selon l'invention représenté en position fermé ;
  • -la figure 2 est une vue schématique en perspective de l'équipage mobile de la figure 1 ;
  • -la figure 3 est une vue partielle de la figure 1 montrant la partie de coupure du disjoncteur respectivement en position fermé et en position ouvert des contacts, cette dernière position étant représentée en traits discontinus ;
  • -la figure 4 est une vue analogue à celle de la figure 3 montrant les contacts en position de fermeture et en traits discontinus en une position intermédiaire au moment de la séparation des contacts, l'écran isolant n'étant pas représenté ;
  • -la figure 5 est une vue schématique en perspective de l'écran isolant.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention given by way of nonlimiting example and represented in the appended drawings in which:
  • FIG. 1 is a view in longitudinal section of a circuit breaker according to the invention shown in the closed position;
  • FIG. 2 is a schematic perspective view of the mobile assembly of FIG. 1;
  • FIG. 3 is a partial view of FIG. 1 showing the breaking part of the circuit breaker respectively in the closed position and in the open position of the contacts, the latter position being shown in broken lines;
  • FIG. 4 is a view similar to that of FIG. 3 showing the contacts in the closed position and in broken lines in an intermediate position when the contacts are separated, the insulating screen not being shown;
  • FIG. 5 is a schematic perspective view of the insulating screen.

Sur les figures, un disjoncteur électrique basse tension comprend un boîtier moulé à fond 10 et à couvercle 12 dans lequel est logé un mécanisme désigné par le repère général 14. La partie électrique du disjoncteur comprend des bornes d'entrée 16 et de sortie 1 9, la borne d'entrée 16 étant reliée à un contact fixe 18 par un conducteur 17, accolé au fond 10 du boîtier moulé. Avec le contact fixe 18 coopèrent des contacts mobiles 20, montés à pivotement sur un axe 22 porté par un support de contact 24, solidaire d'un barreau 26 de liaison entre les différents pôles du disjoncteur. Des contacts mobiles 20 sont reliés par des tresses 28 à un conducteur 30 fixé à la borne de sortie 19. Le conducteur 30 constitue l'enroulement primaire d'un transformateur de courant 72 en forme de tore. Des ressorts 32, intercalés entre le support 24 et les contacts mobiles 20, assurent la pression de contact-Aux contacts 18, 20, est associée une chambre de coupure 34 à tôles de déionisation 36.In the figures, a low voltage electric circuit breaker comprises a molded case at the bottom 10 and with cover 12 in which is housed a mechanism designated by the general reference 14. The electrical part of the circuit breaker comprises input 16 and output 1 9 terminals , the input terminal 16 being connected to a fixed contact 18 by a conductor 17, attached to the bottom 10 of the molded housing. With the fixed contact 18 cooperate movable contacts 20, pivotally mounted on an axis 22 carried by a contact support 24, integral with a bar 26 for connection between the different poles of the circuit breaker. Movable contacts 20 are connected by braids 28 to a conductor 30 fixed to the output terminal 19. The conductor 30 constitutes the primary winding of a current transformer 72 in the form of a toroid. Springs 32, interposed between the support 24 and the movable contacts 20, ensure the contact pressure. With the contacts 18, 20, there is associated a breaking chamber 34 with deionization plates 36.

Le mécanisme 14 comprend une poignée 38 traversant une lumière 40 du couvercle 12 et solidaire d'un support 42, monté à pivotement sur un axe fixe 44 porté par des flasques 46, assujettis au boîtier moulé par des vis 48. Sur un autre axe fixe 50 est articulé un crochet 52 dont l'extrémité 54 coopère avec un accrochage 56. Sur un axe 58 du crochet 52, est articulée une biellette supérieure 60 d'une genouillère à axe 62.The mechanism 14 comprises a handle 38 passing through a lumen 40 of the cover 12 and secured to a support 42, pivotally mounted on a fixed axis 44 carried by flanges 46, secured to the molded housing by screws 48. On another fixed axis 50 is articulated a hook 52 whose end 54 cooperates with an attachment 56. On an axis 58 of the hook 52, is articulated an upper link 60 of a toggle joint with axis 62.

La biellette inférieure 64 de la genouillère est articulée sur un axe 66 porté par le support 24. Un ressort de traction 68 est ancré d'une part sur l'axe 62 de la genouillère et d'autre part sur un axe 70 porté par le support 42 de poignée 38. Un tel disjoncteur est bien connu et décrit en détails dans la demande de brevet déposée conjointement. Une ouverture manuelle du disjoncteur est commandée par le pivotement de la poignée 38 qui provoque la brisure de la genouillère 60, 64, et le déplacement des contacts mobiles en position ouvert. Le pivotement en sens inverse de la poignée 38 commande la fermeture des contacts 18, 20. Lors d'un défaut détecté par le transformateur de courant 72, un circuit de déclenchement, avantageusement électronique, commande le déverrouillage de l'accrochage 56, de façon à libérer le crochet 52. Le pivotement du crochet 52 assure l'ouverture automatique des contacts 18, 20.The lower link 64 of the toggle joint is articulated on an axis 66 carried by the support 24. A tension spring 68 is anchored on the one hand on the axis 62 of the toggle joint and on the other hand on an axis 70 carried by the support 42 for handle 38. Such a circuit breaker is well known and described in detail in the jointly filed patent application. Manual opening of the circuit breaker is controlled by the pivoting of the handle 38 which causes the toggle joint 60, 64 to break, and the movable contacts to move to the open position. The pivoting in the opposite direction of the handle 38 controls the closing of the contacts 18, 20. During a fault detected by the current transformer 72, a tripping circuit, advantageously electronic, controls the unlocking of the latching 56, so to release the hook 52. The pivoting of the hook 52 ensures the automatic opening of the contacts 18, 20.

Le disjoncteur comporte 3 pôles, chacun logé dans un compartiment délimité par des cloisons longitudinales 74 du boîtier moulé. Les 3 pôles sont identiques et seul l'un d'entre eux est décrit ci-dessous, plus particulièrement en référence aux figures 2 à 5. Sur l'axe 22 du support 24 sont montés à pivotement limité 5 bras de contact 76, chacun constitué de 2 lames 78 accolées et solidarisées, notamment par une pastille de contact mobile 80 soudée sur la tranche longitudinale des lames 78. Les bras de contact 76 sont prolongés au delà de l'axe d'articulation 22 par un talon 82 coopérant avec le support 24 pour limiter le pivotement des bras de contact 76 dans le sens inverse des aiguilles d'une montre sur les figures, sous l'action du ressort de pression de contact 32. Les pastilles de contact 80 sont fixées en une partie intermédiaire des lames 78 entre l'axe 22 et l'extrémité frontale 84 des lames 78. La face frontale 84 et la tranche longitudinale 86 en saillie de la pastille de contact mobile 80 constitue une corne d'arc s'étendant en regard d'une corne d'arc fixe 88 associée au contact fixe 18. Le contact fixe 18 comporte une plage de contacts commune à l'ensemble des contacts mobiles 20 du pôle et la corne d'arc fixe 88 est une plaque s'étendant entre le contact fixe 18 et la chambre de coupure 34 dont elle constitue l'une des tôles d'extrémité. La corne d'arc fixe 88 présente dans sa partie adjacente au contact 18 une partie plane 90 située dans le plan du contact fixe 18. La partie plane 98 est prolongée par une partie repliée en bossage 92 ayant un flanc s'étendant dans la direction de déplacement du contact mobile 20. En se référant à la figure 4, on voit que dans la position représentée en traits discontinus de séparation des contacts 18, 20, la corne d'arc mobile 86 forme avec la partie plane 90 de la corne d'arc fixe 88 une piste divergente orientée vers la chambre de coupure 34. La partie repliée 92 de la corne d'arc fixe 88 est à très faible distance de la tranche frontale 84 des lames 78. L'arc tiré, lors de la séparation des contacts 18, 20, se déplace en un premier temps sur les pistes divergentes 86, 90, pour venir rapidement s'ancrer sur le bossage 92 et la tranche en regard 84. Pendant cette phase initiale d'ouverture, l'allongement de l'arc est limité et on voit que dès la séparation des contacts 18, 20, l'écartement entre ces derniers devient supérieur à l'écartement des cornes d'arc 86, 88, notamment au niveau du bossage 92 et de la face frontale 84 des lames 78. On évite ainsi tout retour ou réamorçage de l'arc sur les contacts 18, 20. Lors d'un mouvement poursuivi d'ouverture des contacts mobiles 20, l'arc est étalé devant la chambre de coupure 34 dans laquelle il pénètre de la manière usuelle.The circuit breaker has 3 poles, each housed in a compartment delimited by longitudinal partitions 74 of the molded housing. The 3 poles are identical and only one of them is described below, more particularly with reference to Figures 2 to 5. On the axis 22 of the support 24 are mounted with limited pivoting 5 contact arms 76, each consisting of 2 blades 78 joined and secured, in particular by a movable contact pad 80 welded to the longitudinal edge of the blades 78. The contact arms 76 are extended beyond the hinge axis 22 by a heel 82 cooperating with the support 24 to limit the pivoting of the contact arms 76 anti-clockwise in the figures, under the action of the contact pressure spring 32. The contact pads 80 are fixed in an intermediate part of the blades 78 between the axis 22 and the front end 84 of the blades 78. The front face 84 and the longitudinal edge 86 projecting from the movable contact pad 80 constitutes an arc horn extending opposite a horn d fixed arc 88 associated with fixed contact 18. Contact f ixe 18 comprises a contact area common to all of the movable contacts 20 of the pole and the fixed arcing horn 88 is a plate extending between the fixed contact 18 and the breaking chamber 34 of which it constitutes one of end plates. The fixed arcing horn 88 has, in its part adjacent to the contact 18, a planar part 90 situated in the plane of the fixed contact 18. The planar part 98 is extended by a part folded into a boss 92 having a side extending in the direction of displacement of the movable contact 20. Referring to FIG. 4, it can be seen that in the position shown in broken lines separating the contacts 18, 20, the movable arcing horn 86 forms with the flat part 90 of the horn d 'fixed arc 88 a divergent track oriented towards the breaking chamber 34. The folded part 92 of the fixed arc horn 88 is very close to the front edge 84 of the blades 78. The arc drawn, during separation contacts 18, 20, first moves on the divergent tracks 86, 90, to quickly anchor on the boss 92 and the facing edge 84. During this initial opening phase, the elongation of the arc is limited and we see that upon separation of the contacts 18, 20, the gap tement between the latter becomes greater than the spacing of the arcing horns 86, 88, in particular at the level of the boss 92 and of the front face 84 of the blades 78. This thus avoids any return or re-ignition of the arcing on the contacts 18 , 20. During a continued movement of opening of the movable contacts 20, the arc is spread out in front of the breaking chamber 34 into which it penetrates in the usual manner.

Au contact mobile 20 est associé un écran 94 en une matière isolante moulée gazogène. L'écran 94 est constitué de trois parties, en l'occurrence des lamelles 96 insérées dans les intervalles de séparation des bras de contact 76, une partie frontale 98 prolongeant la face frontale 84 des lames 78 et une partie postérieure 100 disposée au niveau de l'axe 22 d'articulation des bras de contact 76. L'écran 94 présente des encoches 102 de clipsage sur l'axe 22, l'écran étant rigidement ou à faible jeu solidaire du contact mobile 20. L'ensemble lamelle 96 et bras de contact 76 forme avec la partie frontale 98 de l'écran 94 une cloison coopérant à faible jeu avec des nervures 104 prévues sur les cloisons latérales 74. Cette cloison 96, 98 s'étend dans la direction de débattement du contact mobile 20 à l'arrière de la face frontale 84 des lames 78. D'une manière analogue, la partie arrière 100 de l'écran 94 coopère à faible jeu avec les cloisons latérales 74 et avec le fond 10 du boîtier moulé à l'instant de séparation des contacts 18, 20, pour obturer l'espace disposé à l'arrière des contacts 18, 20. La tranche inférieure 105 des lamelles 96 s'étend sensiblement parallèlement au contact fixe 18 en position de fermeture des contacts, en faible retrait des tranches longitudinales des lames 78, portant les pastilles de contact 80. En se référant plus particulièrement à la figure 3, on voit que les contacts 18, 20, sont logés en position de fermeture dans un espace constituant une chambre de formation d'arc, délimitée à la partie inférieure par le contact fixe 18 et la paroi 10, à la partie supérieure par les lames 78 et les lamelles interposées 96 et à la partie droite, sur la figure 3 par la partie 100 de l'écran 94. Cette chambre de formation d'arc est ouverte du côté de la chambre de coupure 34 par un passage confiné par le bossage 92 et la partie frontale 98 de l'écran 94. Il est facile de voir que le volume de cette chambre de formation d'arc est faible et qu'un arc tiré lors de la séparation des contacts 18, 20, provoque une augmentation rapide de la pression dans la chambre de formation avec un écoulement des gaz vers la chambre de coupure 34. Cet écoulement gazeux souffle l'arc en direction de la chambre 34 en le forçant de quitter rapidement les contacts 18, 20. L'effet gazogène de l'écran 94 participe à ce soufflage actif de l'arc.The movable contact 20 is associated with a screen 94 made of a gas-forming molded insulating material. The screen 94 consists of three parts, in this case lamellae 96 inserted in the separation intervals of the contact arms 76, a front part 98 extending the front face 84 of the blades 78 and a rear part 100 disposed at the axis 22 of articulation of the contact arms 76. The screen 94 has notches 102 for clipping onto the axis 22, the screen being rigidly or with little play secured to the movable contact 20. The lamella assembly 96 and contact arm 76 forms with the front part 98 of the screen 94 a partition cooperating with little play with ribs 104 provided on the lateral partitions 74. This partition 96, 98 extends in the direction of movement of the movable contact 20 to the rear of the front face 84 of the blades 78. In a similar manner, the rear part 100 of the screen 94 cooperates with little play with the lateral partitions 74 and with the bottom 10 of the molded case at the instant of separation contacts 18, 20, for closing the space arranged at the rear re contacts 18, 20. The lower edge 105 of the strips 96 extends substantially parallel to the fixed contact 18 in the closed position of the contacts, slightly retracting the longitudinal edges of the blades 78, carrying the contact pads 80. Referring more particularly in FIG. 3, it can be seen that the contacts 18, 20 are housed in the closed position in a space constituting an arcing chamber, delimited at the bottom by the fixed contact 18 and the wall 10, at the upper part by the blades 78 and the interposed lamellae 96 and in the right part, in FIG. 3 by the part 100 of the screen 94. This arc-forming chamber is open on the side of the breaking chamber 34 by a passage confined by the boss 92 and the front part 98 of the screen 94. It is easy to see that the volume of this arc-forming chamber is low and that an arc drawn during the separation of the contacts 18, 20, causes a rapid increase in pres sion in the formation chamber with a flow of gases to the breaking chamber 34. This gas flow blows the arc towards the chamber 34 forcing it to quickly leave the contacts 18, 20. The gas-generating effect of screen 94 participates in this active blowing of the arc.

L'action combinée de soufflage de l'arc, due à l'écran isolant 94 et à la configuration des cornes d'arc 86, 88, permet la réalisation d'un disjoncteur à pouvoir de coupure élevé, dépourvu de contacts d'arc. Il est clair que l'invention est applicable à un contact mobile présentant un nombre de bras de contacts 76 différent, notamment un bras de contact mobile unique.The combined arc blowing action, due to the insulating screen 94 and the configuration of the arcing horns 86, 88, allows the production of a circuit breaker with high breaking capacity, devoid of arcing contacts. . It is clear that the invention is applicable to a mobile contact having a different number of contact arms 76, in particular a single mobile contact arm.

En se référant plus particulièrement aux figures 3 et 4, on voit que la chambre de coupure 34 est obturée à sa partie arrière opposée aux contacts 18, 20, par une plaque ou une paire de plaques 106, en un matériau isolant avantageusement gazogène. La plaque 106 est fixée par son bord supérieur 108 à la carcasse de la chambre de coupure 34 et elle présente une certaine élasticité ou une possibilité de pivotement pour s'écarter des extrémités des tôles 36 en dégageant un passage 110 d'échappement des gaz de la chambre de coupure 34. Lors de coupures de courant de faible intensité, la chambre de coupure 34 est obturée par la plaque 106 autorisant une montée en pression suffisante à l'extinction de l'arc. Lors d'une coupure de courant de forte intensité, la montée en pression provoque la déflexion de la plaque 106 autorisant un échappement des gaz et une limitation de la pression dans la chambre de coupure 34. La plaque 106 agit comme déflecteur des gaz vers le fond 10 du boîtier moulé, ces gaz s'échappant par la suite par des orifices 112, ménagés dans le couvercle 12.With particular reference to FIGS. 3 and 4, it can be seen that the interrupting chamber 34 is closed at its rear part opposite the contacts 18, 20, by a plate or a pair of plates 106, made of an advantageously gas-generating insulating material. The plate 106 is fixed by its upper edge 108 to the carcass of the cutting chamber 34 and it has a certain elasticity or a possibility of pivoting to move away from the ends of the sheets 36 by clearing a passage 110 for exhaust of the gases of the interrupting chamber 34. During low current cuts, the interrupting chamber 34 is closed by the plate 106 authorizing a rise in pressure sufficient to extinguish the arc. During a high current cut, the rise in pressure causes the plate 106 to deflect, allowing gases to escape and a pressure limitation in the cutting chamber 34. The plate 106 acts as a gas deflector towards the bottom 10 of the molded housing, these gases subsequently escaping through orifices 112, formed in the cover 12.

Il est inutile de décrire le fonctionnement du disjoncteur qui ressort de l'exposé précédent et l'invention est bien entendu nullement limitée au mode de mise en oeuvre plus particulièrement décrit.It is unnecessary to describe the operation of the circuit breaker which emerges from the preceding description and the invention is of course in no way limited to the mode of implementation more particularly described.

Claims (7)

1. Disjoncteur basse tension multipolaire à boîtier moulé ayant un fond (10) et plusieurs compartiments juxtaposés internes, chacun associé à l'un des pôles et des cloisons isolantes (74) de séparation desdits compartiments, chaque pôle comprenant : -une pluralité de contacts fixes (18) accolés audit fond (10) du boîtier moulé et une pluralité de contacts mobiles (20), susceptibles d'occuper une position d'ouverture et une position de fermeture, dans laquelle les contacts mobiles coopèrent avec les contacts fixes, -des bras (76) de contacts mobiles en forme de lames (78) allongées ayant des tranches longitudinales (86) et une tranche frontale (84), lesdites lames s'étendant parallèlement à faible écartement les unes des autres, et les contacts mobiles (20) étant fixés sur l'une desdites tranches longitudinales, -un support (24) de bras (76) de contacts mobiles, en forme de cage et un axe (22) porté par ledit support, lesdits bras de contacts étant montés à pivotement limité sur ledit axe qui s'étend perpendiculairement aux lames (78) formant les bras de contacts mobiles, -un arbre (26) sur lequel est monté à pivotement ledit support (24) de bras de contacts mobiles, -un mécanisme de commande (14) actionnant ledit support (24) de bras de contacts mobiles pour le déplacement desdits contacts mobiles dans la position d'ouverture et dans la position de fermeture, -une chambre de formation d'arc ayant deux faces latérales, constituées par les cloisons isolantes - (74) de séparation des pôles, une face inférieure constituée pàr ledit fond (10), une face avant et une face arrière, lesdits contacts fixes (18) et mobiles (20) étant disposés en position de fermeture dans ladite chambre de formation, les contacts fixes du côté de la face inférieure et les contacts mobiles du côté de la face supérieure, -une chambre de coupure (34) à tôles (36) de désionisation, disposée du côté de la face arrière de la chambre de formation d'arc pour capter l'arc tiré dans la chambre de formation, lors de la séparation des contacts (18, 20), caractérisé en ce que l'ensemble des contacts (18, 20) est aligné sur un rang, qu'un écran isolant (94) associé auxdits bras (76) de contacts mobiles présente une partie intercalaire (105) d'obturation des intervalles entre les bras (76) de contacts et des intervalles entre les cloisons isolantes (74) et les bras de contacts (76), et une partie postérieure (100) d'obturation de la face avant de la chambre de formation d'arc en position de fermeture des contacts, cette partie postérieure (100) étant disposée devant les contacts (18, 20) du côté opposé de la chambre de coupure (34), et qu'une corne d'arc (88) fixe s'étend entre les contacts fixes (18) et la chambre de coupure (34) le long de la face inférieure de la chambre de formation d'arc et présente une partie repliée (92) s'étendant dans la direction de débattement des contacts mobiles - (20) en regard de la tranche frontale des contacts mobiles. 1. Low-voltage multipolar circuit breaker with molded housing having a bottom (10) and several internal juxtaposed compartments, each associated with one of the poles and insulating partitions (74) for separating said compartments, each pole comprising: -a plurality of fixed contacts (18) attached to said bottom (10) of the molded housing and a plurality of movable contacts (20), capable of occupying an open position and a closed position, in which the movable contacts cooperate with fixed contacts, -arms (76) of movable contacts in the form of elongated blades (78) having longitudinal edges (86) and a front edge (84), said blades extending parallel to each other, and the movable contacts (20) being fixed to one of said longitudinal sections, a support (24) of arm (76) of mobile contacts, in the form of a cage and an axis (22) carried by said support, said contact arms being mounted with limited pivoting on said axis which extends perpen specifically to the blades (78) forming the movable contact arms, a shaft (26) on which said support (24) of movable contact arms is pivotally mounted, a control mechanism (14) actuating said support (24) of movable contact arms for the displacement of said movable contacts in the open position and in the closed position, an arc forming chamber having two lateral faces, constituted by the insulating partitions - (74) for separating the poles, a lower face formed by said bottom (10), a front face and a rear face, said fixed contacts ( 18) and mobile (20) being disposed in the closed position in said formation chamber, the fixed contacts on the side of the lower face and the mobile contacts on the side of the upper face, a breaking chamber (34) with deionization plates (36), disposed on the side of the rear face of the arc formation chamber to capture the arc drawn in the formation chamber, during the separation of the contacts ( 18, 20), characterized in that the set of contacts (18, 20) is aligned in a row, that an insulating screen (94) associated with said arms (76) of movable contacts has an intermediate part (105) for closing the intervals between the arms (76) of contacts and gaps between the insulating partitions (74) and the contact arms (76), and a rear part (100) for closing the front face of the arc chamber in position for closing the contacts, this rear part (100) being disposed in front of the contacts (18, 20) on the opposite side of the breaking chamber (34), and that a fixed arc horn (88) extends between the fixed contacts (18) and the breaking chamber (34) along the underside of the arcing chamber and has a folded part (92) extending in the direction of movement of the movable contacts - (20) opposite the front edge of the mobile contacts. 2. Disjoncteur selon la revendication 2, caractérisé en ce qu'il comporte une corne d'arc mobile (86) portée par la tranche frontale (84) des bras de contacts mobiles (76) en prolongement de ces derniers en direction de la chambre de coupure (34), lesdites cornes d'arc (84, 86) divergeant en direction de la chambre de coupure pour allonger l'arc, la distance maximale d'écartement desdites cornes étant supérieure à la distance d'écartement de ladite partie repliée (92) à ladite tranche frontale (84) en position de fermeture.2. Circuit breaker according to claim 2, characterized in that it comprises a movable arcing horn (86) carried by the front edge (84) of the movable contact arms (76) in extension of the latter in the direction of the chamber of cutting (34), said arc horns (84, 86) diverging in the direction of the breaking chamber to extend the arc, the maximum distance of separation of said horns being greater than the distance of separation of said folded part (92) to said front edge (84) in the closed position. 3. Disjoncteur selon la revendication 2, caractérisé en ce que la partie repliée (22) de la corne d'arc fixe (88) s'étend à l'instant de séparation des contacts parallèlement aux tranches frontales (84) des bras de contact (76) en forme de lames (78) à une distance suffisamment faible pour éviter tout réamorçage de l'arc sur les contacts - (18,20).3. Circuit breaker according to claim 2, characterized in that the folded part (22) of the fixed arcing horn (88) extends at the instant of separation of the contacts parallel to the front edges (84) of the contact arms (76) in the form of blades (78) at a sufficiently small distance to avoid any re-ignition of the arc on the contacts - (18,20). 4. Disjoncteur selon la revendication 1, 2 ou 3, caractérisé en ce que l'écran isolant (94) est monté à pivotement limité sur l'axe (22) de pivotement des bras de contacts (76) pour accompagner ces derniers dans leur mouvement limité, relatif au support (24), en début de phase d'ouverture du disjoncteur et améliorer l'obturation de la chambre de formation d'arc.4. Circuit breaker according to claim 1, 2 or 3, characterized in that the insulating screen (94) is pivotally mounted on the axis (22) of pivoting of the contact arms (76) to accompany the latter in their limited movement, relative to the support (24), at the start of the circuit-breaker opening phase and improve the sealing of the arc-forming chamber. 5. Disjoncteur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte un conducteur d'amenée de courant (17) accolé audit fond (10) du boîtier moulé et portant lesdits contacts fixes (18), les bras (76) de contacts mobiles en forme de lames (78) parallèles étant sensiblement alignés avec ledit conducteur (17) en position de fermeture et les tranches longitudinales (86) des lames (78) portant les contacts mobiles s'étendant parallèlement à faible distance dudit fond (10), ledit écran isolant (94) coopérant avec ledit fond (10) pour obturer la chambre de formation d'arc du côté opposé de la chambre de coupure (34) à l'instant de séparation des contacts (18, 20) et la chambre de coupure (34), disposée du côté dudit conducteur (17) comportant des tôles (36) parallèles audit fond (10) et une ouverture d'entrée en regard des contacts mobiles (20).5. Circuit breaker according to any one of the preceding claims, characterized in that it comprises a current supply conductor (17) attached to said bottom (10) of the molded housing and carrying said fixed contacts (18), the arms ( 76) of movable contacts in the form of parallel blades (78) being substantially aligned with said conductor (17) in the closed position and the longitudinal edges (86) of the blades (78) carrying the movable contacts extending parallel at a short distance from said bottom (10), said insulating screen (94) cooperating with said bottom (10) to close the arc-forming chamber on the opposite side of the breaking chamber (34) at the instant of separation of the contacts (18, 20 ) and the breaking chamber (34), disposed on the side of said conductor (17) comprising sheets (36) parallel to said bottom (10) and an inlet opening opposite the movable contacts (20). 6. Disjoncteur selon l'une quelconque des revendications précédentes, caractérisé en ce que la chambre de coupure (34) comporte du côté opposé à l'ouverture d'entrée, une ouverture d'échappement des gaz et un clapet (166) d'obturation partielle de cette ouverture, agencé en déflecteur des gaz vers ledit fond (10), ledit clapet dégageant l'ouverture lors d'une surpression interne.6. Circuit breaker according to any one of the preceding claims, characterized in that the breaking chamber (34) comprises on the side opposite to the inlet opening, a gas exhaust opening and a valve (166) of partial closure of this opening, arranged as a gas deflector towards said bottom (10), said valve releasing the opening during an internal overpressure. 7. Disjoncteur selon la revendication 6, caractérisé en ce que ledit clapet (166) est constitué par une plaque isolante en un matériau gazogène, ayant un bord de fixation éloigné du fond (10), ledit clapet étant sollicité élastiquement en position d'obturation.7. Circuit breaker according to claim 6, characterized in that said valve (166) is constituted by an insulating plate made of a gas-generating material, having a fixing edge remote from the bottom (10), said valve being resiliently biased in the closed position. .
EP86401190A 1985-06-12 1986-06-03 Low voltage circuit breaker with interruption Expired - Lifetime EP0206882B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401190T ATE56305T1 (en) 1985-06-12 1986-06-03 LOW VOLTAGE SWITCH WITH BREAKDOWN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8509002A FR2583571B1 (en) 1985-06-12 1985-06-12 LOW VOLTAGE CIRCUIT BREAKER WITH IMPROVED CUT.
FR8509002 1985-06-12

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EP0206882A1 true EP0206882A1 (en) 1986-12-30
EP0206882B1 EP0206882B1 (en) 1990-09-05

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EP86401190A Expired - Lifetime EP0206882B1 (en) 1985-06-12 1986-06-03 Low voltage circuit breaker with interruption

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US (1) US4672157A (en)
EP (1) EP0206882B1 (en)
JP (1) JPH0719529B2 (en)
AT (1) ATE56305T1 (en)
AU (1) AU576726B2 (en)
CA (1) CA1267671A (en)
DE (1) DE3673887D1 (en)
ES (1) ES8705157A1 (en)
FR (1) FR2583571B1 (en)
PT (1) PT82756B (en)
ZA (1) ZA864285B (en)

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EP0358288A2 (en) * 1988-09-08 1990-03-14 Siemens Aktiengesellschaft Contact arrangement for a power circuit breaker with auxiliary and main contacts
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EP0410902A1 (en) * 1989-07-26 1991-01-30 Merlin Gerin Low tension circuit-breaker for high currents with multiple contacts
EP1085552A1 (en) * 1999-09-16 2001-03-21 General Electric Company Improved arcing contact arrangement
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FR2484136A1 (en) * 1980-06-06 1981-12-11 Merlin Gerin Contact element for high current LV circuit breaker - has movable contact plates which are joined by brazing of contact head and shunt at opposite ends of body
EP0142404A1 (en) * 1983-10-04 1985-05-22 Hager Electro S.A. Switches with a pivotally supported contact arm

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ZA864739B (en) * 1985-07-12 1987-02-25 Westinghouse Electric Corp Current limiting circuit breaker with arc commutating structure
US4660009A (en) * 1985-07-29 1987-04-21 Westinghouse Electric Corp. Modular integral circuit interrupter

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DE1926693A1 (en) * 1969-05-24 1970-11-26 Siemens Ag Arc extinguishing chamber for low-voltage circuit breakers
DE2643433B1 (en) * 1976-09-27 1977-06-08 Siemens Ag CIRCUIT BREAKERS, IN PARTICULAR CIRCUIT BREAKERS
FR2484136A1 (en) * 1980-06-06 1981-12-11 Merlin Gerin Contact element for high current LV circuit breaker - has movable contact plates which are joined by brazing of contact head and shunt at opposite ends of body
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2619955A1 (en) * 1987-08-31 1989-03-03 Merlin Gerin CUTTING DEVICE FOR MULTIPOLAR ELECTRIC CIRCUIT BREAKER WITH MULTIPLE CONTACTS
EP0306382A1 (en) * 1987-08-31 1989-03-08 Merlin Gerin Breaker arrangement for an electric multipolar circuit breaker with many contacts
US4877929A (en) * 1987-08-31 1989-10-31 Merlin Gerin Breaking device for multipole electrical circuit breaker with multiple contacts
EP0345412A3 (en) * 1988-06-09 1990-08-01 Electric Power Research Institute, Inc Remotely controllable circuit breaker with improved arc drive structure
EP0345412A2 (en) * 1988-06-09 1989-12-13 Electric Power Research Institute, Inc Remotely controllable circuit breaker with improved arc drive structure
EP0358288A2 (en) * 1988-09-08 1990-03-14 Siemens Aktiengesellschaft Contact arrangement for a power circuit breaker with auxiliary and main contacts
EP0358289A2 (en) * 1988-09-08 1990-03-14 Siemens Aktiengesellschaft Moving contact arrangement with a shielding part
EP0358288A3 (en) * 1988-09-08 1991-01-02 Siemens Aktiengesellschaft Contact arrangement for a power circuit breaker with auxiliary and main contacts
EP0358289A3 (en) * 1988-09-08 1991-05-15 Siemens Aktiengesellschaft Moving contact arrangement with a shielding part
EP0410902A1 (en) * 1989-07-26 1991-01-30 Merlin Gerin Low tension circuit-breaker for high currents with multiple contacts
FR2650434A1 (en) * 1989-07-26 1991-02-01 Merlin Gerin LOW VOLTAGE CIRCUIT BREAKER WITH MULTIPLE CONTACTS AND HIGH CURRENTS
EP1085552A1 (en) * 1999-09-16 2001-03-21 General Electric Company Improved arcing contact arrangement
EP2383760A1 (en) 2010-04-27 2011-11-02 Schneider Electric Industries SAS System with valve for an arc chamber, and circuit breaker having the same.
US9064648B2 (en) 2010-04-27 2015-06-23 Schneider Electric Industries Sas Valve system for an arc extinguishing chamber and circuit breaker comprising same

Also Published As

Publication number Publication date
ES8705157A1 (en) 1987-05-01
AU5853986A (en) 1986-12-18
US4672157A (en) 1987-06-09
PT82756A (en) 1986-07-01
FR2583571A1 (en) 1986-12-19
FR2583571B1 (en) 1994-02-18
ATE56305T1 (en) 1990-09-15
CA1267671A (en) 1990-04-10
ZA864285B (en) 1987-01-28
JPH0719529B2 (en) 1995-03-06
DE3673887D1 (en) 1990-10-11
EP0206882B1 (en) 1990-09-05
AU576726B2 (en) 1988-09-01
JPS6271140A (en) 1987-04-01
ES555746A0 (en) 1987-05-01
PT82756B (en) 1990-06-29

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