EP0905735B1 - Circuit breaker with electromagnetic trip device with actation for a mobile forked contact - Google Patents

Circuit breaker with electromagnetic trip device with actation for a mobile forked contact Download PDF

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Publication number
EP0905735B1
EP0905735B1 EP19980410097 EP98410097A EP0905735B1 EP 0905735 B1 EP0905735 B1 EP 0905735B1 EP 19980410097 EP19980410097 EP 19980410097 EP 98410097 A EP98410097 A EP 98410097A EP 0905735 B1 EP0905735 B1 EP 0905735B1
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EP
European Patent Office
Prior art keywords
circuit breaker
magnetic circuit
movable contact
gap
branches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19980410097
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German (de)
French (fr)
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EP0905735A1 (en
Inventor
Michel Lazareth
Jean-Claude Ramirez
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP0905735A1 publication Critical patent/EP0905735A1/en
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Publication of EP0905735B1 publication Critical patent/EP0905735B1/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • Document FR-A-2495826 which is considered to be the closest state of the art relates to a known circuit breaker of the kind mentioned, in which the two breaking chambers are separated from one another by a partition insulating.
  • the electromagnetic trip unit comprises an electromagnet equipped with a striker that acts directly on the fork of the movable contact to accelerate the movement of the latter to the open position.
  • the striker is mechanically coupled to a movable core of the magnetic circuit of the electromagnet, and acts on the moving contact after catching a dead stroke.
  • the performance of such a circuit breaker is nevertheless limited.
  • the object of the invention is to provide a circuit breaker with high ratings, and high breaking capacity.
  • the upper branch of the magnetic circuit is equipped with two curved extensions extending parallel in the direction of the arms of the movable contact so as to frame the two opposite slots of the lower branch.
  • Such a forked contact arrangement in the first air gap makes it possible to obtain an addition of Laplace elementary forces for rapid opening when the intensity of the current in the pole exceeds a predetermined threshold.
  • the two branches of the magnetic circuit are offset from each other along the axis of displacement of the moving contact to obtain an asymmetrical shift of the first air gap to prolong the effect of the forces Laplace in the sense of openness.
  • the pallet of the magnetic circuit is provided with a first flat part and a second enveloping part arranged opposite the branches at the level of the second gap to adapt the slope of the applied stress curve. to the triggering member.
  • a high-breaking miniature circuit-breaker is housed in a housing 10 made of molded insulating material, and comprises, by pole, a movable contact 12 in the form of a fork cooperating with two fixed contacts 14, 16 to constitute a contact bridge with two cut-off intervals connected in series.
  • the movable contact 12 fork is actuated by a mechanism 18 for manual control by a joystick 20 and automatic via a magnetothermal trip.
  • the magnetothermal trip unit comprises a thermal bimetallic trip unit (not shown), and an electromagnetic thruster 28 placed above the arc extinction chambers 24, 26.
  • the electromagnetic thruster 28 comprises a magnetic circuit 30 H-shaped having a first gap 32 for housing the movable contact 12 fork, and a second air gap 34 cooperating with a pallet 36 pivoting associated with a trigger member 38.
  • the circuit magnetic 30 has two branches lateral 37, 39 joined by a central branch 41 on which is wound an excitation coil 40 traversed by the current flowing through the contacts of the pole.
  • the movable contact 12 has a common support arm 12A of insulating material extending vertically in a central slot 42, provided at the upper part of the first gap 32, and a conductive fork having two arms 12B, 12C parallel connected to a horizontal core 44.
  • Each arm 12B, 12C extends in the vertical direction inside a slot 46, 48 provided at the lower part of the first air gap 32, and cooperates with a fixed contact 14, 16 through which the current passes through opposite directions.
  • the two slots 46, 48 are arranged in the lower branch 39 of the magnetic circuit 30 extending symmetrically with respect to the central slot 42 of the upper branch 37.
  • the conductive core 44 extends in the intermediate horizontal slot of the gap 32, and is located between the two branches 37, 39 being traversed unidirectionally by the total current.
  • the two branches 37, 39 of the magnetic circuit 30 are magnetized in opposite polarities.
  • the magnetic field lines have the same direction in the horizontal slot of the gap 32 and act on the current in the core 44, so as to generate Laplace forces for propelling the movable contact 12 to the open position when the intensity of the current exceeds a predetermined threshold.
  • the other two slots 46, 48 are advantageously framed laterally by extensions 50, 52 bent over the upper branch 37 of the magnetic circuit 30.
  • the magnetic fields in the two slots 46, 48 are in opposite directions, and act on opposite currents in the arms 12B, 12C of the fork of the movable contact 12, so as to add the Laplace forces in the direction of the opening.
  • the presence of the extensions 50, 52 also favors the magnetic blowing of the arc pulled between each fixed contact 14, 16 and the corresponding arm 12B, 12C of the movable contact 12, and driven towards the extinction chamber 24, 26 associated .
  • the series connection of the two cutoff intervals, and the addition of the Laplace elementary forces in the first air gap 32 allow to obtain a high breaking capacity, and a fast extinction of the arcs.
  • the two branches 38, 39 of a magnetic circuit 30A of the electromagnetic trip unit are shifted in the axis of displacement of the movable contact 12, so as to obtain an asymmetrical shift of the first gap 32.
  • magnetic flux passing through the latter acts on the movable contact 12 over a greater length, so as to prolong the effect of the Laplace force in the direction of opening.
  • the magnetic circuit 30B in H of the electromagnetic release comprises in the second gap 34 a pivoting pallet 36 composed of a first flat portion 36A and a second enveloping portion 36B.
  • the distribution of the surfaces between the two parts 36A, 36B makes it possible to precisely adjust the slope of response of the stress curve acting on the release member 38 of FIG. 1.
  • the size of the first flat portion 36A is increased relative to the second enveloping portion 36B.
  • the relative width of the first flat portion 36A will be smaller relative to the second wrapping portion 36B.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Description

L'invention est relative à un disjoncteur à haut pouvoir de coupure logé dans un boîtier en matériau isolant moulé, et comprenant par pôle :

  • deux chambres d'extinction d'arc disposées côte-à-côte dans la partie inférieure du boîtier, et ayant chacune un empilage de tôles de désionisation,
  • une paire de contacts fixes disposée en regard desdits chambres, et, coopérant avec un contact mobile double en forme de fourche pour constituer deux intervalles de coupure connectés électriquement en série,
  • et un mécanisme de commande manuelle par une manette et/ou automatique par l'intermédiaire de moyens de déclenchement sensibles à l'intensité du courant traversant le pôle, lesdits moyens comprenant au moins un déclencheur électromagnétique à propulseur ayant un circuit magnétique coopérant avec une palette.
The invention relates to a high-breaking circuit breaker housed in a housing made of molded insulating material, and comprising:
  • two arc extinction chambers arranged side by side in the lower part of the housing, and each having a stack of deionization plates,
  • a pair of fixed contacts arranged facing said chambers, and cooperating with a fork-shaped double movable contact to constitute two switching gaps connected electrically in series,
  • and a mechanism for manual control by a joystick and / or automatic via triggering means responsive to the intensity of the current flowing through the pole, said means comprising at least one electromagnetic thruster with a magnetic circuit cooperating with a pallet .

Le document FR-A-2495826 ce qui est considéré comme l'etat de la technique le plus proche se rapporte à un disjoncteur connu du genre mentionné, dans lequel les deux chambres de coupure sont séparées l'une de l'autre par une cloison isolante. Le déclencheur électromagnétique comprend un électro-aimant équipé d'un percuteur qui agit directement sur la fourche du contact mobile pour accélérer le déplacement de ce dernier vers la position d'ouverture. Le percuteur est accouplé mécaniquement à un noyau mobile du circuit magnétique de l'électro-aimant, et agit sur le contact mobile après rattrapage d'une course morte. Les performances d'un tel disjoncteur restent néanmoins limitées.Document FR-A-2495826 which is considered to be the closest state of the art relates to a known circuit breaker of the kind mentioned, in which the two breaking chambers are separated from one another by a partition insulating. The electromagnetic trip unit comprises an electromagnet equipped with a striker that acts directly on the fork of the movable contact to accelerate the movement of the latter to the open position. The striker is mechanically coupled to a movable core of the magnetic circuit of the electromagnet, and acts on the moving contact after catching a dead stroke. The performance of such a circuit breaker is nevertheless limited.

L'objet de l'invention consiste à réaliser un disjoncteur à forts calibres, et à pouvoir de coupure élevé.The object of the invention is to provide a circuit breaker with high ratings, and high breaking capacity.

Le disjoncteur selon l'invention est caractérisé en ce que le contact mobile en fourche est logé dans un premier entrefer du circuit magnétique en forme de H constitué par deux branches latérales magnétisées selon des polarités opposées par une bobine d'excitation agencée sur une branche centrale, la fourche conductrice étant portée par un bras de support isolant, et comprenant deux bras parallèles connectés à une âme horizontale,

  • le premier entrefer comporte une fente centrale dans la branche supérieure pour le passage du bras de support isolant, et deux autres fentes ménagées aux extrémités de la branche inférieure du circuit magnétique pour le logement des deux bras du contact mobile,
  • l'âme de la fourche s'étend dans la fente horizontale de l'entrefer entre les deux branches, en étant soumise à un champ magnétique unidirectionnel engendré par la bobine.
The circuit breaker according to the invention is characterized in that the movable fork contact is housed in a first air gap of the H-shaped magnetic circuit formed by two magnetized side branches in opposite polarities by an excitation coil. arranged on a central branch, the conductive fork being carried by an insulating support arm, and comprising two parallel arms connected to a horizontal core,
  • the first gap comprises a central slot in the upper branch for the passage of the insulating support arm, and two other slots provided at the ends of the lower branch of the magnetic circuit for housing the two arms of the movable contact,
  • the web of the fork extends in the horizontal slot of the gap between the two branches, being subjected to a unidirectional magnetic field generated by the coil.

Selon un mode de réalisation préférentiel de l'invention, la branche supérieure du circuit magnétique est équipée de deux extensions recourbées s'étendant parallèlement selon la direction des bras du contact mobile de manière à encadrer les deux fentes opposées de la branche inférieure.According to a preferred embodiment of the invention, the upper branch of the magnetic circuit is equipped with two curved extensions extending parallel in the direction of the arms of the movable contact so as to frame the two opposite slots of the lower branch.

Un tel agencement de contact mobile en fourche dans le premier entrefer permet d'obtenir une addition des forces élémentaires de Laplace pour l'ouverture rapide lorsque l'intensité du courant dans le pôle dépasse un seuil prédéterminé.Such a forked contact arrangement in the first air gap makes it possible to obtain an addition of Laplace elementary forces for rapid opening when the intensity of the current in the pole exceeds a predetermined threshold.

Selon une caractéristique de l'invention, les deux branches du circuit magnétique sont décalées l'une de l'autre le long de l'axe de déplacement du contact mobile pour obtenir un décalage dissymétrique du premier entrefer permettant de prolonger l'effet des forces de Laplace dans le sens de l'ouverture.According to one characteristic of the invention, the two branches of the magnetic circuit are offset from each other along the axis of displacement of the moving contact to obtain an asymmetrical shift of the first air gap to prolong the effect of the forces Laplace in the sense of openness.

Selon une autre caractéristique de l'invention, la palette du circuit magnétique est pourvue d'une première partie plate et d'une deuxième partie enveloppante disposées en regard des branches au niveau du deuxième entrefer pour adapter la pente de la courbe d'effort appliquée à l'organe de déclenchement.According to another characteristic of the invention, the pallet of the magnetic circuit is provided with a first flat part and a second enveloping part arranged opposite the branches at the level of the second gap to adapt the slope of the applied stress curve. to the triggering member.

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 un vue schématique en élévation d'un disjoncteur selon l'invention, l'une des faces latérales du boîtier isolant étant enlevée,
  • les figures 2 et 3 sont des vues en coupe respectives selon les lignes 2-2 et 3-3 de la figure 1,
  • la figure 4A montre une vue partielle à échelle agrandie du circuit magnétique du déclencheur à propulseur,
  • la figure 4B est une coupe selon la ligne 4-4 de la figure 4A,
  • la figure 5 représente une vue en perspective d'une autre variante de réalisation du déclencheur à propulseur.
Other advantages and features will emerge more clearly from the following description of an embodiment of the invention, given by way of non-limiting example and represented in the accompanying drawings, in which:
  • FIG. 1 is a schematic view in elevation of a circuit breaker according to the invention, one of the lateral faces of the insulating housing being removed,
  • Figures 2 and 3 are respective sectional views along the lines 2-2 and 3-3 of Figure 1,
  • FIG. 4A shows an enlarged partial view of the magnetic circuit of the booster trigger,
  • FIG. 4B is a section along line 4-4 of FIG. 4A,
  • Figure 5 shows a perspective view of another embodiment of the thruster trigger.

En référence aux figures 1 à 3, un disjoncteur miniature à haut pouvoir de coupure est logé dans un boîtier 10 en matériau isolant moulé, et comporte par pôle, un contact mobile 12 en forme de fourche coopérant avec deux contacts fixes 14, 16 pour constituer un pont de contact à deux intervalles de coupure connectés en série. Le contact mobile 12 en fourche est actionné par un mécanisme 18 de commande manuelle par une manette 20 et automatique par l'intermédiaire d'un déclencheur magnétothermique.With reference to FIGS. 1 to 3, a high-breaking miniature circuit-breaker is housed in a housing 10 made of molded insulating material, and comprises, by pole, a movable contact 12 in the form of a fork cooperating with two fixed contacts 14, 16 to constitute a contact bridge with two cut-off intervals connected in series. The movable contact 12 fork is actuated by a mechanism 18 for manual control by a joystick 20 and automatic via a magnetothermal trip.

De part et d'autre d'une cloison 22 isolante verticale sont agencées deux chambres d'extinction d'arc 24, 26 constituées chacune par un empilage de tôles de désionisation. Le déclencheur magnétothermique comporte un déclencheur thermique à bilame (non représenté), et un déclencheur électromagnétique à propulseur 28 disposé au-dessus des chambres d'extinction d'arc 24, 26.On either side of a vertical insulating partition 22 are arranged two arc extinguishing chambers 24, 26 each constituted by a stack of deionization plates. The magnetothermal trip unit comprises a thermal bimetallic trip unit (not shown), and an electromagnetic thruster 28 placed above the arc extinction chambers 24, 26.

Le déclencheur électromagnétique à propulseur 28 comprend un circuit magnétique 30 en forme de H ayant un premier entrefer 32 de logement du contact mobile 12 en fourche, et un deuxième entrefer 34 coopérant avec une palette 36 pivotante associée à un organe de déclenchement 38. Le circuit magnétique 30 comporte deux branches latérales 37, 39 réunies par une branche centrale 41 sur laquelle est enroulée une bobine d'excitation 40 traversée par le courant circulant à travers les contacts du pôle.The electromagnetic thruster 28 comprises a magnetic circuit 30 H-shaped having a first gap 32 for housing the movable contact 12 fork, and a second air gap 34 cooperating with a pallet 36 pivoting associated with a trigger member 38. The circuit magnetic 30 has two branches lateral 37, 39 joined by a central branch 41 on which is wound an excitation coil 40 traversed by the current flowing through the contacts of the pole.

Le contact mobile 12 est doté d'un bras de support 12A commun en matériau isolant s'étendant verticalement dans une fente 42 centrale, prévue à la partie supérieure du premier entrefer 32, et d'une fourche conductrice ayant deux bras 12B, 12C parallèles connectés à une âme 44 horizontale. Chaque bras 12B, 12C s'étend dans la direction verticale à l'intérieur d'une fente 46, 48 prévue à la partie inférieure du premier entrefer 32, et coopère avec un contact fixe 14,16 en étant traversé par le courant selon des sens opposés.The movable contact 12 has a common support arm 12A of insulating material extending vertically in a central slot 42, provided at the upper part of the first gap 32, and a conductive fork having two arms 12B, 12C parallel connected to a horizontal core 44. Each arm 12B, 12C extends in the vertical direction inside a slot 46, 48 provided at the lower part of the first air gap 32, and cooperates with a fixed contact 14, 16 through which the current passes through opposite directions.

Les deux fentes 46, 48 sont agencées dans la branche inférieure 39 du circuit magnétique 30 en s'étendant symétriquement par rapport à la fente 42 centrale de la branche supérieure 37. L'âme 44 conductrice s'étend dans la fente horizontale intermédiaire de l'entrefer 32, et est située entre les deux branches 37, 39 en étant traversée unidirectionnellement par le courant total. Les deux branches 37, 39 du circuit magnétique 30 sont magnétisées selon des polarités opposées.
Les lignes de champ magnétique ont la même direction dans la fente horizontale de l'entrefer 32 et agissent sur le courant dans l'âme 44, de manière à engendrer des forces de Laplace destinées à propulser le contact mobile 12 vers la position d'ouverture lorsque l'intensité du courant dépasse un seuil prédéterminé.The two slots 46, 48 are arranged in the lower branch 39 of the magnetic circuit 30 extending symmetrically with respect to the central slot 42 of the upper branch 37. The conductive core 44 extends in the intermediate horizontal slot of the gap 32, and is located between the two branches 37, 39 being traversed unidirectionally by the total current. The two branches 37, 39 of the magnetic circuit 30 are magnetized in opposite polarities.
The magnetic field lines have the same direction in the horizontal slot of the gap 32 and act on the current in the core 44, so as to generate Laplace forces for propelling the movable contact 12 to the open position when the intensity of the current exceeds a predetermined threshold.

Les deux autres fentes 46, 48 sont avantageusement encadrées latéralement par des extensions 50, 52 recourbées de la branche supérieure 37 du circuit magnétique 30. Les champs magnétiques dans les deux fentes 46, 48 sont de sens opposés, et agissent sur des courants opposés dans les bras 12B, 12C de la fourche du contact mobile 12, de manière à additionner les forces de Laplace dans le sens de l'ouverture.The other two slots 46, 48 are advantageously framed laterally by extensions 50, 52 bent over the upper branch 37 of the magnetic circuit 30. The magnetic fields in the two slots 46, 48 are in opposite directions, and act on opposite currents in the arms 12B, 12C of the fork of the movable contact 12, so as to add the Laplace forces in the direction of the opening.

La présence des extensions 50, 52 favorise également le soufflage magnétique de l'arc tiré entre chaque contact fixe 14, 16 et le bras 12B, 12C correspondant du contact mobile 12, et chassé en direction de la chambre d'extinction 24, 26 associée. La connexion en série des deux intervalles de coupure, et l'addition des forces élémentaires de Laplace dans le premier entrefer 32 permettent d'obtenir un pouvoir de coupure élevé, et une extinction rapide des arcs.The presence of the extensions 50, 52 also favors the magnetic blowing of the arc pulled between each fixed contact 14, 16 and the corresponding arm 12B, 12C of the movable contact 12, and driven towards the extinction chamber 24, 26 associated . The series connection of the two cutoff intervals, and the addition of the Laplace elementary forces in the first air gap 32 allow to obtain a high breaking capacity, and a fast extinction of the arcs.

Dans la variante des figures 4A et 4B, les deux branches 38, 39 d'un circuit magnétique 30A du déclencheur électromagnétique sont décalées dans l'axe du déplacement du contact mobile 12, de manière à obtenir un décalage dissymétrique du premier entrefer 32. Le flux magnétique traversant ce dernier agit sur le contact mobile 12 sur une plus grande longueur, de manière à prolonger l'effet de la force de Laplace dans le sens de l'ouverture.In the variant of FIGS. 4A and 4B, the two branches 38, 39 of a magnetic circuit 30A of the electromagnetic trip unit are shifted in the axis of displacement of the movable contact 12, so as to obtain an asymmetrical shift of the first gap 32. magnetic flux passing through the latter acts on the movable contact 12 over a greater length, so as to prolong the effect of the Laplace force in the direction of opening.

Dans l'autre variante de la figure 5, le circuit magnétique 30B en H du déclencheur électromagnétique comporte dans le deuxième entrefer 34 une palette 36 pivotante composée d'une première partie plate 36A et d'une deuxième partie enveloppante 36B. La répartition des surfaces entre les deux parties 36A, 36B permet d'ajuster avec précision la pente de réponse de la courbe d'effort agissant sur l'organe de déclenchement 38 de la figure 1. Pour l'obtention d'une courbe à pente forte, on augmente la dimension de la première partie plate 36A par rapport à la deuxième partie enveloppante 36B. Inversement si le changement de raideur de pente recherché est situé sur la fin de course de la palette 36, la largeur relative de la première partie plate 36A sera plus faible par rapport à la deuxième partie enveloppante 36B.In the other variant of FIG. 5, the magnetic circuit 30B in H of the electromagnetic release comprises in the second gap 34 a pivoting pallet 36 composed of a first flat portion 36A and a second enveloping portion 36B. The distribution of the surfaces between the two parts 36A, 36B makes it possible to precisely adjust the slope of response of the stress curve acting on the release member 38 of FIG. 1. To obtain a slope curve strong, the size of the first flat portion 36A is increased relative to the second enveloping portion 36B. Conversely, if the desired slope stiffness change is located at the end of travel of the pallet 36, the relative width of the first flat portion 36A will be smaller relative to the second wrapping portion 36B.

Il est également possible de prévoir des épaisseurs différentes au niveau des deux parties 36A, 36B de la palette 36 pour adapter le type de courbe d'effort.It is also possible to provide different thicknesses at the two parts 36A, 36B of the pallet 36 to adapt the type of stress curve.

Claims (6)

  1. Circuit breaker with a high breaking capacity housed in a case (10) made of moulded insulating material and comprising per pole:
    - two arc chutes (24, 26) arranged side by side in the bottom part of the case (10) and each having a stack of de-ionizing plates,
    - a pair of stationary contacts (14, 16) arranged facing said arc chutes and operating in conjunction with a double movable contact (12) in the form of a fork to constitute two breaking gaps electrically connected in series,
    - and an operating mechanism (18), manual via a handle (20) and/or automatic by means of trip means sensitive to the intensity of the current flowing through the pole, said means comprising at least one electromagnetic trip unit with a thruster (28) having a magnetic circuit (30, 30A, 30B) operating in conjunction with a vane (36),
    characterized in that:
    - the forked movable contact (12) is housed in a first air-gap (32) of the H-shaped magnetic circuit (30) formed by two lateral branches (37, 39) magnetized to different polarities by an excitation coil (40) arranged on a central branch (41), the conducting fork being borne by an insulating support arm (12A) and comprising two parallel arms (12B, 12C) connected to a horizontal core (44),
    - the first air-gap (32) comprises a central slot (42) in the upper branch (37) for passage of the insulating support arm (12A), and two other slots (46, 48) arranged at the ends of the lower branch (39) of the magnetic circuit (30) for housing the two arms (12B, 12C) of the movable contact (12),
    - the core (44) of the fork extends in the horizontal slot of the air-gap (32) between the two branches (37, 39), being subjected to a unidirectional magnetic field generated by the coil (40).
  2. Circuit breaker according to claim 1, characterized in that the upper branch (37) of the magnetic circuit (30) is equipped with two curved extensions (50, 52) extending in parallel manner in the direction of the arms (12B, 12C) of the movable contact (12) so as to frame the two opposite slots (46, 48) of the lower branch (39).
  3. Circuit breaker according to claim 1 or 2, characterized in that the two slots (46, 48) of the lower branch (39) are symmetric with respect to the mid-axis passing via the central slot (42) of the upper branch (37).
  4. Circuit breaker according to claim 1, characterized in that the two branches (37, 39) of the magnetic circuit (30A) are staggered from one another along the axis of movement of the movable contact (12) to obtain a dissymmetric offset of the first air-gap (32) enabling the effect of the Laplace forces to be prolonged in the opening direction.
  5. Circuit breaker according to claim 1, characterized in that the vane (36) of the magnetic circuit (30B) is provided with a first flat part (36A) and a second enveloping part (36B) arranged facing the branches (37, 39) at the level of the second air-gap (34) to adjust the slope of the force curve applied to a trip member (38).
  6. Circuit breaker according to claim 5, characterized in that the trip member (38) is formed by a rod secured to the vane (36) and extending along the upper branch (37) of the magnetic circuit (30, 30A, 30B).
EP19980410097 1997-09-24 1998-09-04 Circuit breaker with electromagnetic trip device with actation for a mobile forked contact Expired - Lifetime EP0905735B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712091 1997-09-24
FR9712091A FR2768856B1 (en) 1997-09-24 1997-09-24 ELECTROMAGNETIC CIRCUIT BREAKER WITH MOBILE FORK CONTACT PROPELLER

Publications (2)

Publication Number Publication Date
EP0905735A1 EP0905735A1 (en) 1999-03-31
EP0905735B1 true EP0905735B1 (en) 2006-04-12

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EP19980410097 Expired - Lifetime EP0905735B1 (en) 1997-09-24 1998-09-04 Circuit breaker with electromagnetic trip device with actation for a mobile forked contact

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EP (1) EP0905735B1 (en)
DE (1) DE69834159T2 (en)
ES (1) ES2259451T3 (en)
FR (1) FR2768856B1 (en)

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Publication number Priority date Publication date Assignee Title
DE102011008832A1 (en) * 2011-01-19 2012-07-19 Abb Ag Service switching device
CN108321058A (en) * 2018-02-28 2018-07-24 首瑞（天津）电气设备有限公司 A kind of electromagnetic trip breaker

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FR2708140B1 (en) * 1993-07-19 1995-09-01 Merlin Gerin Circuit breaker provided with a pilot hooking control mechanism by an electromagnetic thruster.
FR2722608B1 (en) * 1994-07-18 1996-08-30 Schneider Electric Sa ELECTROMAGNETIC LOW VOLTAGE CIRCUIT BREAKER
FR2722609B1 (en) * 1994-07-18 1996-08-30 Schneider Electric Sa ELECTRIC CIRCUIT BREAKER WITH ELECTROMAGNETIC ACTUATOR FOR HIGH CALIBERS
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DE69834159D1 (en) 2006-05-24
FR2768856B1 (en) 1999-11-12
EP0905735A1 (en) 1999-03-31
ES2259451T3 (en) 2006-10-01
FR2768856A1 (en) 1999-03-26
DE69834159T2 (en) 2007-01-04

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