EP0817224A1 - Interrupting device for high caliber circuit breaker - Google Patents

Interrupting device for high caliber circuit breaker Download PDF

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Publication number
EP0817224A1
EP0817224A1 EP97410070A EP97410070A EP0817224A1 EP 0817224 A1 EP0817224 A1 EP 0817224A1 EP 97410070 A EP97410070 A EP 97410070A EP 97410070 A EP97410070 A EP 97410070A EP 0817224 A1 EP0817224 A1 EP 0817224A1
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EP
European Patent Office
Prior art keywords
compartment
arc
cut
bulb
shells
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
EP97410070A
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German (de)
French (fr)
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EP0817224B1 (en
Inventor
Alain Menier
Jean-Yves Amblard
Michel Perrot
Lionel Caillat
Jean-Claude Ramirez
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Schneider Electric Industries SAS
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Schneider Electric SE
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Publication of EP0817224A1 publication Critical patent/EP0817224A1/en
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Publication of EP0817224B1 publication Critical patent/EP0817224B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the extinguishing chamber of arc is placed directly in the plastic case of the circuit breaker, and the chamber arc formation consists of a pair of guide cheeks made of material insulator, positioned parallel to the large side faces of the housing, and extending from the contact separation zone to the deionization plates of the extinguishing chamber.
  • the chamber arc formation consists of a pair of guide cheeks made of material insulator, positioned parallel to the large side faces of the housing, and extending from the contact separation zone to the deionization plates of the extinguishing chamber.
  • ceramic guide cheeks or caps made of gas-generating material inserted on ferromagnetic studs.
  • the performance of such circuit breakers have cut-off limits if the overall dimensions of the case must be kept.
  • Document FR-A- 2682531 mentions a low-power multipole industrial circuit breaker voltage making use of cut-off bulbs at the different poles.
  • Each bulb is formed by a box containing two extinguishing chambers, and a bridge double-break rotary contact mounted floating on a section of rotary bar extending to the center of the box.
  • the breaking performance are obtained by putting two arcs in series, and using an energy mechanism important.
  • the object of the invention is to provide a cut-out device for a circuit breaker strong calibers, and with reduced overall dimensions, having high cutting performance.
  • the breaking device is characterized in that the two shells of the bulb are attached to each other to delimit a subdivided internal space in a plurality of compartments distributed at different levels for a gradual increase in the arc passage sections towards the chamber extinction, the first compartment in the vicinity of the contacts being arranged at first level, causing a rolling effect of the arc drawn at the start of the race opening of the movable contact to favor the switching of the arc on the horns of extended guide in the second compartment, which is located second level with a width greater than that of the first compartment.
  • the end faces of the shells defining the first compartment each have an extension located on the first level, and protruding into the second compartment so as to form a baffle extending transversely between the guide horns.
  • a first series of holes for decompression is arranged in each shell in the vicinity of the separation notch of the second compartment and the third compartment to create a depression at the entrance to the extinguishing chamber.
  • Fresh gas is drawn in from the outside of the bulb when the bow is in the second compartment.
  • the use of a cut-off bulb requires that the third compartment has a gas exhaust port to the housing volume of the mechanism.
  • the exhaust port is located at the top of the chamber extinction, and in the vicinity of the end of the upper arc horn.
  • the third compartment is provided a second series of holes communicating with a drainage channel provided at the rear of the extinguishing chamber, and being in connection with said orifice exhaust.
  • the loop effect is also reinforced thanks to an insulating screen intended to cover the portion of the conductor located opposite the movable contact arm, and extending to the vicinity of the fixed contact.
  • the displacement of the arc at the start of the opening stroke can be accelerated by the use of ferromagnetic elements arranged on the external walls of the bulb.
  • a cut-off device 10 of a heavy-duty electric circuit breaker includes a contact arm 12 mounted at pivoting on an axis 14 between a closed position and a position opening hours.
  • the contact arm 12 is coupled to a control mechanism (not shown), and extends inside an air gap formed in an actuator electromagnetic (not shown), as described in document EP-A 635 859 of the plaintiff.
  • the contact arm 12 carries opposite the axis 14 a contact piece, called by the following mobile contact 17, which cooperates in the closed position with a fixed contact 18.
  • the two separable contacts 17, 18 are arranged inside a bulb 20 of break also containing an arc extinguishing chamber 22 formed by a stacking of deionization sheets of the electric arc.
  • the electromagnetic actuator is positioned in an orifice 16 of the bulb 20.
  • the fixed contact 18 is carried by a loop-shaped conductor 24, crossing the magnetic circuit of the actuator 16, and connected to a pad 26 in connection with a connection terminal (not shown).
  • a conductor extension 24 downstream of the fixed contact 18 is shaped according to an upper arc horn 28 framing the entrance to the arc extinguishing chamber 22 in cooperation with the arc horn lower 30.
  • the movable contact arm 12 is connected by a braid to the other terminal connection (not shown) possibly via a bimetallic strip a thermal release.
  • the cut-off bulb 20 of each pole is described in detail with reference to the figures 3 to 7, and is composed of a box with two shells 20A, 20B made of plastic material molded, housed inside the circuit breaker box.
  • the two shells 20A, 20B are joined together to confine an internal space 32, which is subdivided into several compartments 34, 36, 38 stepped on three levels A, B, C.
  • the first compartment 34 is located in the vicinity of the contacts 17, 18 and has a very narrow width L1 containment zone, delimited between the end faces 35.37 of shells 20A, 20B.
  • the second intermediate compartment 36 has a smaller containment zone of width L2 greater than that L1 of the first compartment 34, but less than the width L3 of the third compartment 38 enclosing the arc extinguishing chamber 22.
  • the cross section is maximum in the third compartment 38, the width L3 corresponding substantially to the width of the deionization plates, which extend parallel to the bottom of chamber 22 and to the terminal portion of the lower arc horn 30.
  • each end face 35.37 is provided a extension 40A, 40B which extends into the middle zone of the second compartment 36 by forming at least one baffle whose depth corresponds to the difference of levels A and B.
  • Each extension 40A, 40B comprises on the outside of the shell 20A, 20B, a groove 42A, 42B intended to receive an element ferromagnetic integral with the cylinder head of the actuator.
  • a first series of decompression holes 44 is provided in each shell 20A, 20B, extending to the entrance to the third compartment 38 between the horns arc 28.30.
  • the notch 46 for separation between the second compartment 36 and the third compartment 38 of each shell 20A, 20B comprises a bevelled surface 48 so as to constitute a divergent intended for accelerate the speed of movement of the arc towards the extinguishing chamber 22.
  • a second series of holes 50 communicates with a channel provided at the rear of the extinguishing chamber 22 in the third compartment 38.
  • a groove 52A, 52B lateral decompression is located in each shell 20A, 20B at the level of the middle zone of the extinguishing chamber 22.
  • the insulating bulb 20 is equipped in addition with another orifice 54 for exhausting the gas to the housing volume of the mechanism.
  • Port 54 is located at the upper third compartment 38, and near the end of the horn upper arc 28. It is in communication with the discharge channel 51.
  • the shell 20A is provided with an insulating screen 56 intended to cover the portion of the conductor 24 located opposite the movable contact arm 12, and extending to vicinity of the fixed contact 18.
  • the presence of the screen 56 re-establishes a loop effect, and promotes switching of the arc on the guide horns 28, 30.
  • the migration of arc roots to the second compartment 36 of level B is fast, while the central part of the arch remains laminated by the presence of extensions 40 located at level A.
  • the displacement of the arc towards the level C of the extinguishing chamber 22 can also be accelerated by means magnetic becoming active following the loop effect reinforced by the screen 56, and the presence of ferromagnetic cheeks of shells 20A, 20B, and elements ferromagnetic inserted in the grooves 42A, 42B.
  • the arrangement of the first series of holes 44 also creates a depression at the entrance to the third compartment 38, allowing fresh gas to be drawn in depending on the position of the arc.
  • the arrangement of the bulb causes at all times an overpressure upstream of the arc, and a depression downstream of the arc, so as to favor rapid movement towards the extinguishing chamber.
  • the arc moves along the horns 28.30, and is propelled on the deionization plates from the extinguishing chamber 22, where it cools quickly and turns off.
  • the recycling gases are effected through the lateral grooves 52A, 52B.
  • the evacuation of gases from cut-off takes place through the exhaust port 54 towards the internal volume of the mechanism (arrow F1 in FIG. 2C), and downwards (arrow F2) coming from channel 51.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

At the first level, in the compartment (34) near the contacts (17, 18), the arc is laminated at the beginning of the opening of the moving contact (17) so as turn the arc by upper and lower arc guide horns (28, 30) extending into the second compartment (36). The half-shells have a section standing proud in the second compartment to form a transverse zig-zag between the guides. The extinction chamber (22) is in the third compartment (38) with a first series of decompression holes (44) made in the shells in the neighbourhood of a step with a chamfered edge (48) separating the second and third compartments and opening out before the holes. A gas exit hole (54) lies at the top of the third compartment.

Description

L'invention est relative à un dispositif de coupure pour un disjoncteur électrique à boítier moulé et à forts calibres, comportant:

  • une ampoule de coupure unipolaire formée par une boíte à deux coquilles en matière plastique moulée logée dans le boítier du disjoncteur,
  • un contact fixe coopérant avec un contact mobile pour tirer un arc à l'intérieur de l'ampoule lors de l'ouverture du disjoncteur suite à un défaut,
  • et une chambre d'extinction d'arc logée à l'intérieur de l'ampoule, et encadrée par une paire de cornes de guidage de l'arc.
The invention relates to a breaking device for an electric circuit breaker with a molded case and with large ratings, comprising:
  • a unipolar cut-off bulb formed by a box with two molded plastic shells housed in the case of the circuit breaker,
  • a fixed contact cooperating with a movable contact to draw an arc inside the bulb when the circuit breaker opens following a fault,
  • and an arc extinguishing chamber housed inside the bulb, and framed by a pair of arc guide horns.

Dans les disjoncteurs divisionnaires connus de l'art antérieur, la chambre d'extinction d'arc est placée directement dans le boítier en plastique du disjoncteur, et la chambre de formation d'arc est constituée par une paire de joues de guidage en matériau isolant, positionnées parallèlement aux grandes faces latérales du boítier, et s'étendant depuis la zone de séparation des contacts, jusqu'au tôles de désionisation de la chambre d'extinction. Pour accélérer le déplacement de l'arc vers les tôles de désionisation, ou utilise généralement des joues de guidage en céramique ou des capuchons en matériau gazogène insérés sur des plots ferromagnétiques. Pour des calibres élevés, par exemple de l'ordre de 125A, les performances de tels disjoncteurs présentent des limites de coupure si l'encombrement du boítier doit être conservé.In the divisional circuit breakers known from the prior art, the extinguishing chamber of arc is placed directly in the plastic case of the circuit breaker, and the chamber arc formation consists of a pair of guide cheeks made of material insulator, positioned parallel to the large side faces of the housing, and extending from the contact separation zone to the deionization plates of the extinguishing chamber. To accelerate the movement of the arc towards the sheets of deionization, or generally uses ceramic guide cheeks or caps made of gas-generating material inserted on ferromagnetic studs. For some high ratings, for example of the order of 125A, the performance of such circuit breakers have cut-off limits if the overall dimensions of the case must be kept.

Le document FR-A- 2682531 mentionne un disjoncteur industriel multipolaire basse tension faisant usage d'ampoules de coupure au niveau des différents pôles. Chaque ampoule est formée par une boite renfermant deux chambres d'extinction, et un pont de contact rotatif à double coupure monté flottant sur un tronçon de barreau rotatif s'étendant au centre de la boite. Dans ce type d'appareil, les performances de coupure sont obtenues par la mise en série de deux arcs, et l'usage d'un mécanisme à énergie importante.Document FR-A- 2682531 mentions a low-power multipole industrial circuit breaker voltage making use of cut-off bulbs at the different poles. Each bulb is formed by a box containing two extinguishing chambers, and a bridge double-break rotary contact mounted floating on a section of rotary bar extending to the center of the box. In this type of device, the breaking performance are obtained by putting two arcs in series, and using an energy mechanism important.

L'objet de l'invention consiste à réaliser un dispositif de coupure d'un disjoncteur de forts calibres, et à encombrement réduit, ayant des performances de coupure élevées. The object of the invention is to provide a cut-out device for a circuit breaker strong calibers, and with reduced overall dimensions, having high cutting performance.

Le dispositif de coupure selon l'invention est caractérisé en ce que les deux coquilles de l'ampoule sont accolées l'une à l'autre pour délimiter un espace interne subdivisé en une pluralité de compartiments répartis à des niveaux différents pour un accroissement progressif des sections de passage de l'arc en direction de la chambre d'extinction, le premier compartiment au voisinage des contacts étant agencé au premier niveau, en provoquant un effet de laminage de l'arc tiré au début de la course d'ouverture du contact mobile pour favoriser la commutation de l'arc sur les cornes de guidage se prolongeant dans le deuxième compartiment, lequel se trouve à un deuxième niveau en présentant une largeur supérieure à celle du premier compartiment.The breaking device according to the invention is characterized in that the two shells of the bulb are attached to each other to delimit a subdivided internal space in a plurality of compartments distributed at different levels for a gradual increase in the arc passage sections towards the chamber extinction, the first compartment in the vicinity of the contacts being arranged at first level, causing a rolling effect of the arc drawn at the start of the race opening of the movable contact to favor the switching of the arc on the horns of extended guide in the second compartment, which is located second level with a width greater than that of the first compartment.

Selon une caractéristique de l'invention, les faces terminales des coquilles délimitant le premier compartiment, comportent chacune une extension située au premier niveau, et faisant saillie dans le deuxième compartiment de manière à former une chicane s'étendant transversalement entre les cornes de guidage.According to a characteristic of the invention, the end faces of the shells defining the first compartment, each have an extension located on the first level, and protruding into the second compartment so as to form a baffle extending transversely between the guide horns.

Selon un mode de réalisation préférentiel, une première série de trous de décompression est agencée dans chaque coquille au voisinage du cran de séparation du deuxième compartiment et du troisième compartiment pour créer une dépression à l'entrée de la chambre d'extinction. Une aspiration de gaz frais s'effectue depuis l'extérieur de l'ampoule lorsque l'arc se trouve dans le deuxième compartiment. L'étagement des sections de passage de l'arc dans les différents compartiments, et la présence des trous de décompression à des endroits prédéterminés de l'ampoule constituent les paramètres contribuant à engendrer une surpression à l'amont de l'arc, et une dépression à l'aval de l'arc pendant le déplacement de ce dernier vers la chambre d'extinction.According to a preferred embodiment, a first series of holes for decompression is arranged in each shell in the vicinity of the separation notch of the second compartment and the third compartment to create a depression at the entrance to the extinguishing chamber. Fresh gas is drawn in from the outside of the bulb when the bow is in the second compartment. The staging of the arc passage sections in the various compartments, and the presence of decompression holes at predetermined locations on the bulb constitute the parameters contributing to generate an overpressure upstream of the arc, and a depression downstream of the arc during its displacement towards the extinguishing chamber.

L'emploi d'une ampoule de coupure nécessite que le troisième compartiment comporte un orifice à d'échappement des gaz vers le volume de logement du mécanisme. L'orifice d'échappement est situé à la partie supérieure de la chambre d'extinction, et au voisinage de l'extrémité de la corne d'arc supérieure.The use of a cut-off bulb requires that the third compartment has a gas exhaust port to the housing volume of the mechanism. The exhaust port is located at the top of the chamber extinction, and in the vicinity of the end of the upper arc horn.

Selon une autre caractéristique de l'invention, le troisième compartiment est doté d'une deuxième série de trous communiquant avec un canal d'évacuation prévu à l'arrière de la chambre d'extinction, et se trouvant en liaison avec ledit orifice d'échappement. According to another characteristic of the invention, the third compartment is provided a second series of holes communicating with a drainage channel provided at the rear of the extinguishing chamber, and being in connection with said orifice exhaust.

L'effet de boucle est également renforcé grâce à un écran isolant destiné à recouvrir la portion du conducteur se trouvant en regard du bras de contact mobile, et s'étendant jusqu'au voisinage du contact fixe.The loop effect is also reinforced thanks to an insulating screen intended to cover the portion of the conductor located opposite the movable contact arm, and extending to the vicinity of the fixed contact.

Le déplacement de l'arc au début de la course d'ouverture peut être accéléré par l'emploi d'éléments ferromagnétiques disposés sur les parois externes de l'ampoule.The displacement of the arc at the start of the opening stroke can be accelerated by the use of ferromagnetic elements arranged on the external walls of the bulb.

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

  • la figure 1 est une vue en élévation du dispositif de coupure selon l'invention, les contacts étant représentés en position de fermeture, et la coquille supérieure de l'ampoule étant enlevée;
  • la figure 2A montre une vue identique de la figure 1, après enlèvement de la chambre d'extinction d'arc;
  • les figures 2B et 2C sont des vues identiques de la figure 1, lors de la phase de séparation des contacts, et en fin d'ouverture du contact mobile;
  • la figure 3 est une vue en perspective de la partie interne d'une coquille de l'ampoule;
  • la figure 4 est une vue identique de la figure 3 après retournement de la coquille montrant le côté externe de l'ampoule;
  • les figures 5, 6 et 7 sont des vues en coupe respectivement selon les lignes 5-5, 6-6 et 7-7 de la figure 2A.
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:
  • Figure 1 is an elevational view of the switching device according to the invention, the contacts being shown in the closed position, and the upper shell of the bulb being removed;
  • FIG. 2A shows an identical view to FIG. 1, after removal of the arc extinguishing chamber;
  • Figures 2B and 2C are identical views of Figure 1, during the contact separation phase, and at the end of opening of the movable contact;
  • Figure 3 is a perspective view of the inner part of a shell of the bulb;
  • Figure 4 is an identical view to Figure 3 after inversion of the shell showing the outer side of the bulb;
  • Figures 5, 6 and 7 are sectional views respectively along lines 5-5, 6-6 and 7-7 of Figure 2A.

En référence aux figures 1, 2A, 2B et 2C, un dispositif de coupure 10 d'un disjoncteur électrique à forts calibres, comporte un bras de contact 12 monté à pivotement sur un axe 14 entre une position de fermeture, et une position d'ouverture. Le bras de contact 12 est accouplé à un mécanisme de commande (non représenté), et s'étend à l'intérieur d'un entrefer ménagé dans un actionneur électromagnétique (non représenté), tel que décrit dans le document EP-A 635859 de la demanderesse. With reference to FIGS. 1, 2A, 2B and 2C, a cut-off device 10 of a heavy-duty electric circuit breaker, includes a contact arm 12 mounted at pivoting on an axis 14 between a closed position and a position opening hours. The contact arm 12 is coupled to a control mechanism (not shown), and extends inside an air gap formed in an actuator electromagnetic (not shown), as described in document EP-A 635 859 of the plaintiff.

Le bras de contact 12 porte à l'opposé de l'axe 14 une pièce de contact, appelé par la suite contact mobile 17, lequel coopère en position de fermeture avec un contact fixe 18. Les deux contacts 17,18 séparables sont agencés à l'intérieur d'une ampoule 20 de coupure renfermant également une chambre d'extinction d'arc 22 formée par un empilage de tôles de désionisation de l'arc électrique. L'actionneur électromagnétique est positionné dans un orifice 16 de l'ampoule 20.The contact arm 12 carries opposite the axis 14 a contact piece, called by the following mobile contact 17, which cooperates in the closed position with a fixed contact 18. The two separable contacts 17, 18 are arranged inside a bulb 20 of break also containing an arc extinguishing chamber 22 formed by a stacking of deionization sheets of the electric arc. The electromagnetic actuator is positioned in an orifice 16 of the bulb 20.

Le contact fixe 18 est porté par un conducteur 24 en forme de boucle, traversant le circuit magnétique de l'actionneur 16, et relié à une plage 26 en liaison avec une borne de raccordement (non représentée). Un prolongement de conducteur 24 en aval du contact fixe 18 est conformée selon une corne d'arc supérieure 28 encadrant l'entrée de la chambre d'extinction d'arc 22 en coopération avec la corne d'arc inférieure 30. Le bras de contact mobile 12 est connecté par une tresse à l'autre borne de raccordement (non représentée) éventuellement par l'intermédiaire d'une bilame d'un déclencheur thermique.The fixed contact 18 is carried by a loop-shaped conductor 24, crossing the magnetic circuit of the actuator 16, and connected to a pad 26 in connection with a connection terminal (not shown). A conductor extension 24 downstream of the fixed contact 18 is shaped according to an upper arc horn 28 framing the entrance to the arc extinguishing chamber 22 in cooperation with the arc horn lower 30. The movable contact arm 12 is connected by a braid to the other terminal connection (not shown) possibly via a bimetallic strip a thermal release.

L'ampoule 20 de coupure de chaque pôle est décrite en détail en référence aux figures 3 à7, et est composée d'une boite à deux coquilles 20A, 20B en matériau plastique moulé, logée à l'intérieur du boítier du disjoncteur. Les deux coquilles 20A, 20B sont accolées l'une à l'autre pour confiner un espace interne 32, lequel est subdivisé en plusieurs compartiment 34, 36, 38 étagés sur trois niveaux A, B, C.The cut-off bulb 20 of each pole is described in detail with reference to the figures 3 to 7, and is composed of a box with two shells 20A, 20B made of plastic material molded, housed inside the circuit breaker box. The two shells 20A, 20B are joined together to confine an internal space 32, which is subdivided into several compartments 34, 36, 38 stepped on three levels A, B, C.

Le premier compartiment 34 se trouve au voisinage des contacts 17,18 et présente une zone de confinement de largeur L1 très étroite, délimitée entre les faces terminales 35,37 des coquilles 20A, 20B. Le deuxième compartiment 36 intermédiaire est doté d'une zone de confinement moins importante de largeur L2 supérieure à celle L1 du premier compartiment 34, mais inférieure à la largeur L3 du troisième compartiment 38 renfermant la chambre d'extinction d'arc 22. La section transversale est maximum dans le troisième compartiment 38, la largeur L3 correspondant sensiblement à la largeur des tôles de désionisation, lesquelles s'étendent parallèlement par rapport au fond de la chambre 22 et à la portion terminale de la corne d'arc inférieure 30.The first compartment 34 is located in the vicinity of the contacts 17, 18 and has a very narrow width L1 containment zone, delimited between the end faces 35.37 of shells 20A, 20B. The second intermediate compartment 36 has a smaller containment zone of width L2 greater than that L1 of the first compartment 34, but less than the width L3 of the third compartment 38 enclosing the arc extinguishing chamber 22. The cross section is maximum in the third compartment 38, the width L3 corresponding substantially to the width of the deionization plates, which extend parallel to the bottom of chamber 22 and to the terminal portion of the lower arc horn 30.

L'accroissement en gradins des sections de passage de l'arc en direction des tôles de la chambre d'extinction 22 est particulièrement avantageux pour le développement et la vitesse de déplacement de l'arc. Dans chaque face terminale 35,37 est ménagée une extension 40A, 40B qui se prolonge dans la zone médiane du deuxième compartiment 36 en formant au moins une chicane dont la profondeur correspond à la différence des niveaux A et B. Chaque extension 40A, 40B comporte du côté extérieur de la coquille 20A, 20B, une rainure 42A, 42B destinée à recevoir un élément ferromagnétique solidaire de la culasse de l'actionneur.The stepped increase in the arc passage sections towards the sheets of the extinguishing chamber 22 is particularly advantageous for the development and speed of movement of the arc. In each end face 35.37 is provided a extension 40A, 40B which extends into the middle zone of the second compartment 36 by forming at least one baffle whose depth corresponds to the difference of levels A and B. Each extension 40A, 40B comprises on the outside of the shell 20A, 20B, a groove 42A, 42B intended to receive an element ferromagnetic integral with the cylinder head of the actuator.

Une première série de trous 44 de décompression est prévue dans chaque coquille 20A, 20B, en s'étendant à l'entrée du troisième compartiment 38 entre les cornes d'arc 28,30. A l'intérieur de l'ampoule 20, le cran 46 de séparation entre le deuxième compartiment 36 et le troisième compartiment 38 de chaque coquille 20A, 20B comprend une surface biseautée 48 de manière à constituer un divergent destiné à accélérer la vitesse de déplacement de l'arc vers la chambre d'extinction 22.A first series of decompression holes 44 is provided in each shell 20A, 20B, extending to the entrance to the third compartment 38 between the horns arc 28.30. Inside the bulb 20, the notch 46 for separation between the second compartment 36 and the third compartment 38 of each shell 20A, 20B comprises a bevelled surface 48 so as to constitute a divergent intended for accelerate the speed of movement of the arc towards the extinguishing chamber 22.

Une deuxième série de trous 50 communique avec un canal prévu à l'arrière de la chambre d'extinction 22 dans le troisième compartiment 38. Une rainure 52A, 52B latérale de décompression est située dans chaque coquille 20A, 20B au niveau de la zone médiane de la chambre d'extinction 22.A second series of holes 50 communicates with a channel provided at the rear of the extinguishing chamber 22 in the third compartment 38. A groove 52A, 52B lateral decompression is located in each shell 20A, 20B at the level of the middle zone of the extinguishing chamber 22.

L'ampoule 20 isolante est équipée en plus d'un autre orifice 54 d'échappement des gaz vers le volume de logement du mécanisme. L'orifice 54 est situé à la partie supérieure du troisième compartiment 38, et au voisinage de l'extrémité de la corne d'arc supérieure 28. Il est en communication avec le canal d'évacuation 51.The insulating bulb 20 is equipped in addition with another orifice 54 for exhausting the gas to the housing volume of the mechanism. Port 54 is located at the upper third compartment 38, and near the end of the horn upper arc 28. It is in communication with the discharge channel 51.

La coquille 20A est pourvue d'un écran 56 isolant destiné à recouvrir la portion du conducteur 24 située en regard du bras de contact 12 mobile, et s'étendant jusqu'au voisinage du contact fixe 18. La présence de l'écran 56 rétablit un effet de boucle, et favorise la commutation de l'arc sur les cornes de guidage 28, 30.The shell 20A is provided with an insulating screen 56 intended to cover the portion of the conductor 24 located opposite the movable contact arm 12, and extending to vicinity of the fixed contact 18. The presence of the screen 56 re-establishes a loop effect, and promotes switching of the arc on the guide horns 28, 30.

L'extinction de l'arc lors de la séparation des contacts 17,18 du disjoncteur suite à l'apparition d'un défaut, s'effectue de la manière suivante:Arc extinction when the contacts 17,18 of the circuit breaker are separated following the appearance of a fault is carried out as follows:

La séparation des contacts 17,18 intervient par la commande de l'actionneur électromagnétique ou de la détente du ressort d'ouverture du mécanisme après le déverrouillage par le levier de déclenchement. Étant donné que le bras de contact 12 se déplace exclusivement dans la fente étroite du premier compartiment 34 de l'ampoule 20, l'arc initial subit un effet de laminage au début de la course d'ouverture, ce qui favorise la commutation sur les cornes d'arc 28,30 supérieure et inférieure (figure 2B). The separation of the contacts 17,18 occurs by the control of the actuator electromagnetic or the release of the opening spring of the mechanism after the unlocked by the release lever. Since the contact arm 12 moves exclusively in the narrow slot of the first compartment 34 of bulb 20, the initial arc undergoes a rolling effect at the start of the stroke opening, which favors switching on the upper 28.30 arc horns and lower (Figure 2B).

La migration des racines d'arc vers le deuxième compartiment 36 de niveau B est rapide, alors que la partie centrale de l'arc reste laminée par la présence des extensions 40 se trouvant au niveau A. Le déplacement de l'arc en direction du niveau C de la chambre d'extinction 22 peut également être accéléré par des moyens magnétiques devenant actifs suite à l'effet de boucle renforcé par l'écran 56, et à la présence de joues ferromagnétiques des coquilles 20A, 20B, et d'éléments ferromagnétiques insérés dans les rainures 42A, 42B.The migration of arc roots to the second compartment 36 of level B is fast, while the central part of the arch remains laminated by the presence of extensions 40 located at level A. The displacement of the arc towards the level C of the extinguishing chamber 22 can also be accelerated by means magnetic becoming active following the loop effect reinforced by the screen 56, and the presence of ferromagnetic cheeks of shells 20A, 20B, and elements ferromagnetic inserted in the grooves 42A, 42B.

L'agencement de la première série de trous 44 crée d'autre part une dépression à l'entrée du troisième compartiment 38, permettant une l'aspiration de gaz frais en fonction de la position de l'arc. L'agencement de l'ampoule provoque à tout moment une surpression en amont de l'arc, et une dépression en aval de l'arc, de manière à favoriser un déplacement rapide vers la chambre d'extinction.The arrangement of the first series of holes 44 also creates a depression at the entrance to the third compartment 38, allowing fresh gas to be drawn in depending on the position of the arc. The arrangement of the bulb causes at all times an overpressure upstream of the arc, and a depression downstream of the arc, so as to favor rapid movement towards the extinguishing chamber.

L'arc se déplace le long des cornes 28,30, et est propulsé sur les tôles de désionisation de la chambre d'extinction 22, où il se refroidit rapidement et s'éteint. Le recyclage des gaz s'effectue à travers les rainures 52A, 52B latérales. L'évacuation des gaz de coupure s'opère par l'orifice 54 d'échappement vers le volume interne du mécanisme (flèche F1 sur figure 2C), et vers le bas (flèche F2) en provenance du canal 51.The arc moves along the horns 28.30, and is propelled on the deionization plates from the extinguishing chamber 22, where it cools quickly and turns off. The recycling gases are effected through the lateral grooves 52A, 52B. The evacuation of gases from cut-off takes place through the exhaust port 54 towards the internal volume of the mechanism (arrow F1 in FIG. 2C), and downwards (arrow F2) coming from channel 51.

Claims (10)

Dispositif de coupure pour un disjoncteur électrique à boítier moulé et à forts calibres, comportant: une ampoule (20) de coupure unipolaire formée par une boíte à deux coquilles (20A,20B) en matière plastique moulée, logée dans le boítier du disjoncteur, un contact fixe (18) coopérant avec un contact mobile (17) pour tirer un arc à l'intérieur de l'ampoule (20) lors de l'ouverture du disjoncteur suite à un défaut, -et une chambre d'extinction d'arc (22) logée à l'intérieur de l'ampoule (20), et encadrée par une paire de cornes (28,30) de guidage de l'arc, caractérisé en ce que les deux coquilles (20A, 20B) de l'ampoule (20) sont accolées l'une à l'autre pour délimiter un espace interne (32) subdivisé en une pluralité de compartiments (34, 36, 38) répartis à des niveaux différents (A,B,C) pour un accroissement progressif des sections de passage de l'arc en direction de la chambre d'extinction (22), le premier compartiment (34) au voisinage des contacts (17,18) étant agencé au premier niveau (A), en provoquant un effet de laminage de l'arc tiré au début de la course d'ouverture du contact mobile (17) pour favoriser la commutation de l'arc sur les cornes de guidage (28,30) se prolongeant dans le deuxième compartiment (36), lequel se trouve à un deuxième niveau (B) en présentant une largeur (L2) supérieure à celle L1 du premier compartiment (34).Cut-off device for an electrical circuit breaker with a molded case and with large ratings, comprising: a single-pole cut-off bulb (20) formed by a box with two shells (20A, 20B) of molded plastic material, housed in the case of the circuit breaker, a fixed contact (18) cooperating with a movable contact (17) to draw an arc inside the bulb (20) during the opening of the circuit breaker following a fault, -and an extinction chamber arc (22) housed inside the bulb (20), and framed by a pair of horns (28,30) for guiding the arc, characterized in that the two shells (20A, 20B) of the bulb (20) are joined to one another to delimit an internal space (32) subdivided into a plurality of compartments (34, 36, 38) distributed at different levels (A, B, C) for a progressive increase in the arc passage sections in the direction of the extinguishing chamber (22), the first compartment (34) in the vicinity of the contacts (17,18) being arranged at the first level (A), causing a rolling effect of the arc drawn at the start of the opening stroke of the movable contact (17) to promote switching of the arc on the guide horns (28, 30) extending into the second compartment (36), which is at a second level (B) having a width (L2) greater than that L1 of the first compartment (34). Dispositif de coupure selon la revendication 1, caractérisé en ce que les faces terminales (35,37) des coquilles (20A, 20B) délimitant le premier compartiment (34), comportent chacune une extension (40A,40B) située au premier niveau (A), et faisant saillie dans le deuxième compartiment (36) de manière à former une chicane s'étendant transversalement entre les cornes de guidage (28,30).Cut-off device according to claim 1, characterized in that the faces terminals (35,37) of the shells (20A, 20B) delimiting the first compartment (34), each have an extension (40A, 40B) located on the first level (A), and making projection in the second compartment (36) so as to form a baffle extending transversely between the guide horns (28,30). Dispositif de coupure selon la revendication 1 ou 2, caractérisé en ce que la chambre d'extinction d'arc (22) est disposée dans le troisième compartiment (38) ayant une largeur (L3) supérieure à celle (L2) du deuxième compartiment (36), et qu'une première série de trous (44) de décompression est agencée dans chaque coquille (20A,20B) au voisinage du cran (46) de séparation du deuxième compartiment (36) et du troisième compartiment (38). Cut-off device according to claim 1 or 2, characterized in that the arc extinguishing chamber (22) is arranged in the third compartment (38) having a width (L3) greater than that (L2) of the second compartment (36), and a first series of decompression holes (44) is arranged in each shell (20A, 20B) in the vicinity of the notch (46) for separating the second compartment (36) and the third compartment (38). Dispositif de coupure selon la revendication 3, caractérisé en ce que le cran (46) de chaque coquille (20A, 20B) est équipée d'une surface biseautée (48) pour constituer un divergent avant la première série de trous (44).Cutting device according to claim 3, characterized in that the notch (46) of each shell (20A, 20B) is equipped with a bevelled surface (48) to constitute a divergent before the first series of holes (44). Dispositif de coupure selon la revendication 1 ou 3, caractérisé en ce que le troisième compartiment (38) comporte un orifice (54) d'échappement des gaz vers le volume de logement du mécanisme.Cut-off device according to claim 1 or 3, characterized in that the third compartment (38) has an orifice (54) for exhausting gases to the housing volume of the mechanism. Dispositif de coupure selon la revendication 5, caractérisé en ce que l'orifice (54) d'échappement est situé à la partie supérieure de la chambre d'extinction (22), et au voisinage de l'extrémité de la corne d'arc supérieure (28).Cut-off device according to claim 5, characterized in that the orifice (54) exhaust is located at the top of the extinguishing chamber (22), and at the near the end of the upper bow horn (28). Dispositif de coupure selon la revendication 5, caractérisé en ce que le troisième compartiment (38) est doté d'une deuxième série de trous (50) communiquant avec un canal d'évacuation (51) prévu à l'arrière de la chambre d'extinction (22), et se trouvant en liaison avec ledit orifice (54) d'échappement.Cut-off device according to claim 5, characterized in that the third compartment (38) has a second series of holes (50) communicating with a evacuation channel (51) provided at the rear of the extinguishing chamber (22), and is finding in connection with said exhaust orifice (54). Dispositif de coupure selon la revendication 1, caractérisé en ce que le contact fixe (18) est porté par un conducteur (24) en forme de boucle se prolongeant par la corne d'arc supérieure (28), et que l'une des coquilles (20A) est équipée d'un écran (56) isolant destiné à recouvrir la portion du conducteur (24) se trouvant en regard du bras de contact (12) mobile, et s'étendant jusqu'au voisinage du contact fixe (18).Cut-off device according to claim 1, characterized in that the fixed contact (18) is carried by a conductor (24) in the form of a loop extending by the horn upper arc (28), and that one of the shells (20A) is equipped with a screen (56) insulator intended to cover the portion of the conductor (24) located opposite the arm contact (12) mobile, and extending to the vicinity of the fixed contact (18). Dispositif de coupure selon la revendication 2, caractérisé en ce que chaque extension (40A, 40B) comporte à l'extérieur de la coquille (20A, 20B) correspondante, une rainure (42A,42B) dans laquelle peut être inséré un élément ferromagnétique, notamment un actionneur électromagnétique associé au bras de contact (12) mobile.Cut-off device according to claim 2, characterized in that each extension (40A, 40B) has outside of the shell (20A, 20B) corresponding, a groove (42A, 42B) into which an element can be inserted ferromagnetic, in particular an electromagnetic actuator associated with the arm of contact (12) mobile. Dispositif de coupure selon la revendication 2, caractérisé en ce que des joues en matériau ferromagnétique peuvent être positionnées à l'extérieur de l'ampoule (20) sur les faces terminales (35,37) des coquilles (20A, 20B).Cutting device according to claim 2, characterized in that cheeks in ferromagnetic material can be positioned outside the bulb (20) on the end faces (35,37) of the shells (20A, 20B).
EP19970410070 1996-07-05 1997-07-03 Interrupting device for high caliber circuit breaker Expired - Lifetime EP0817224B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9608638 1996-07-05
FR9608638A FR2750795B1 (en) 1996-07-05 1996-07-05 SWITCHING DEVICE FOR A HIGH-CALIBER ELECTRIC CIRCUIT BREAKER

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EP0817224A1 true EP0817224A1 (en) 1998-01-07
EP0817224B1 EP0817224B1 (en) 2002-04-03

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EP19970410070 Expired - Lifetime EP0817224B1 (en) 1996-07-05 1997-07-03 Interrupting device for high caliber circuit breaker

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EP (1) EP0817224B1 (en)
CN (1) CN1067487C (en)
DE (1) DE69711504T2 (en)
EA (1) EA000195B1 (en)
ES (1) ES2175313T3 (en)
FR (1) FR2750795B1 (en)

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EP1191560A1 (en) * 2000-09-25 2002-03-27 Hager Electro S.A. Gas-blast device for electrical arc in an electrical modular apparatus
CN106898530A (en) * 2015-09-16 2017-06-27 西门子公司 Extinguisher and safe controller switching equipment

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JP4637722B2 (en) * 2005-11-08 2011-02-23 三菱電機株式会社 Circuit breaker
CZ298548B6 (en) * 2006-02-01 2007-10-31 Oez, S. R. O. Electroinsulating cover of moving contact carrier of electric appliance, particularly of power circuit breaker
CN100446151C (en) * 2006-09-06 2008-12-24 大全集团有限公司 Module type current circuit-breaker
US20120175348A1 (en) * 2009-09-18 2012-07-12 Schneider Electric IndustriesSAS Single-Pole Breaking Unit Comprising a Rotary Contact Bridge, Switchgear Device Comprising Such a Unit and Circuit Breaker Comprising Such a Device
BR112012006182B1 (en) * 2009-09-18 2019-10-22 Schneider Electric Ind Sas cutting device having at least one unipolar cutting block comprising a contact bridge and circuit breaker;
CN101894715B (en) * 2010-07-08 2012-06-13 江苏辉能电气有限公司 Arc extinguishing chamber for low-voltage breaker
CN101986415B (en) * 2010-11-11 2012-12-26 江苏辉能电气有限公司 Arc extinguishing chamber of molded case low voltage circuit breaker
DE102012214826A1 (en) 2012-08-21 2014-02-27 Siemens Aktiengesellschaft switching device
CN103021706B (en) * 2012-12-28 2015-06-17 常熟开关制造有限公司(原常熟开关厂） Electric switch device with electric arc isolating sleeve
CN109616390B (en) * 2018-12-28 2021-10-26 天津京人电器有限公司 Multi-pole switch
CN116230466A (en) * 2023-04-07 2023-06-06 浙江人民电器有限公司 High breaking plug-in circuit breaker of heavy current

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EP1191560A1 (en) * 2000-09-25 2002-03-27 Hager Electro S.A. Gas-blast device for electrical arc in an electrical modular apparatus
CN106898530A (en) * 2015-09-16 2017-06-27 西门子公司 Extinguisher and safe controller switching equipment
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Also Published As

Publication number Publication date
CN1067487C (en) 2001-06-20
EA000195B1 (en) 1998-12-24
CN1174391A (en) 1998-02-25
EP0817224B1 (en) 2002-04-03
ES2175313T3 (en) 2002-11-16
FR2750795B1 (en) 1998-09-25
FR2750795A1 (en) 1998-01-09
DE69711504T2 (en) 2002-09-26
EA199700072A1 (en) 1998-02-26
DE69711504D1 (en) 2002-05-08

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