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EP0905735A1 - 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
EP0905735A1
EP0905735A1 EP98410097A EP98410097A EP0905735A1 EP 0905735 A1 EP0905735 A1 EP 0905735A1 EP 98410097 A EP98410097 A EP 98410097A EP 98410097 A EP98410097 A EP 98410097A EP 0905735 A1 EP0905735 A1 EP 0905735A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
branch
magnetic circuit
circuit
air gap
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
EP98410097A
Other languages
German (de)
French (fr)
Other versions
EP0905735B1 (en
Inventor
Michel Lazareth
Jean-Claude Ramirez
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
Schneider Electric Industries SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schneider Electric SE, Schneider Electric Industries SAS filed Critical Schneider Electric SE
Publication of EP0905735A1 publication Critical patent/EP0905735A1/en
Application granted granted Critical
Publication of EP0905735B1 publication Critical patent/EP0905735B1/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
    • 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

  • the document FR-A-2495826 relates to a known circuit breaker of the kind mentioned, in which the two breaking chambers are separated from each other by a partition insulating.
  • the electromagnetic trip unit includes an electromagnet equipped with a striker which acts directly on the fork of the movable contact to accelerate the movement of the latter towards the open position.
  • the striker is coupled mechanically to a moving core of the magnetic circuit of the electromagnet, and acts on the moving contact after catching a dead stroke. The performance of such circuit breaker remain limited.
  • the object of the invention consists in making a circuit breaker with high ratings and with the power to high cutoff.
  • the upper branch of the circuit magnetic is equipped with two curved extensions extending in parallel according to the direction of the arms of the movable contact so as to frame the two opposite slots of the lower branch.
  • Such a movable fork contact arrangement in the first air gap allows 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 movement of the movable contact to obtain an asymmetrical offset of the first air gap making it possible to prolong the effect of the forces of Laplace in the direction of opening.
  • the palette of the magnetic circuit is provided with a first flat part and a second enveloping part arranged in look of the branches at the second air gap to adapt the slope of the curve of force applied to the triggering member.
  • a miniature circuit breaker with high breaking capacity is housed in a housing 10 of molded insulating material, and comprises, by pole, a contact mobile 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 mobile contact 12 in fork is actuated by a mechanism 18 of manual control by a lever 20 and automatic via a thermomagnetic trip device.
  • thermomagnetic release On either side of a vertical insulating partition 22 are arranged two chambers arc extinction 24, 26 each consisting of a stack of deionization sheets.
  • the thermomagnetic release includes a bimetal thermal release (not shown), and an electromagnetic trip device with propellant 28 disposed above the arc extinguishing chambers 24, 26.
  • the electromagnetic trip device 28 has a magnetic circuit 30 H-shaped having a first gap 32 for housing the movable contact 12 in fork, and a second air gap 34 cooperating with a pivoting pallet 36 associated with a trigger member 38.
  • the magnetic circuit 30 has two branches side 37, 39 joined by a central branch 41 on which a coil is wound excitation 40 traversed by the current flowing through the pole contacts.
  • the movable contact 12 is provided with a common support arm 12A made of insulating material extending vertically into a central slot 42, provided at the upper part of the first air gap 32, and a conductive fork having two parallel arms 12B, 12C connected to a horizontal core 44.
  • Each arm 12B, 12C extends in the direction vertical inside a slot 46, 48 provided at the bottom of the first air gap 32, and cooperates with a fixed contact 14, 16 while being traversed by the current in directions opposites.
  • 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 'air 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 according to opposite polarities.
  • the magnetic field lines have the same direction in the horizontal slot of the air gap 32 and act on the current in the core 44, so as to generate Laplace forces intended to propel the movable contact 12 towards the open position. when the intensity of the current exceeds a predetermined threshold.
  • the two other slots 46, 48 are advantageously framed laterally by extensions 50, 52 curved of 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 two branches 38, 39 of a magnetic circuit 30A of the electromagnetic trip unit are offset in the axis of movement of the movable contact 12, so as to obtain an asymmetrical offset of the first air gap 32.
  • the magnetic flux passing through the latter acts on the movable contact 12 on a more great length, so as to prolong the effect of the Laplace force in the direction of the opening.
  • the magnetic circuit 30B at H of the trigger electromagnetic comprises in the second air gap 34 a pivoting pallet 36 composed of a first flat part 36A and a second enveloping part 36B.
  • the distribution of the surfaces between the two parts 36A, 36B makes it possible to adjust with precision the response slope of the force curve acting on the trigger 38 of Figure 1.
  • the relative width of the first flat part 36A will be weaker compared to the second enveloping part 36B.

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

Abstract

The construction uses an H-shaped magnetic gap between the swinging fork section and the magnetic circuit providing a large magnetic field area, and thus a strong magnetic force.

Description

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

  • deux chambres d'extinction d'arc disposées côte-à-côte dans la partie inférieure du boítier, 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 circuit breaker with high breaking capacity housed in a casing made of molded insulating material, and comprising by pole:
  • two arc extinguishing chambers arranged side by side in the lower part of the housing, and each having a stack of deionization sheets,
  • a pair of fixed contacts arranged opposite said chambers, and, cooperating with a double movable contact in the form of a fork to constitute two cutoff intervals electrically connected in series,
  • and a manual control mechanism by a lever and / or automatic by means of triggering means sensitive to the intensity of the current passing through the pole, said means comprising at least one electromagnetic trip device with propellant having a magnetic circuit cooperating with a pallet .

Le document FR-A-2495826 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.The document FR-A-2495826 relates to a known circuit breaker of the kind mentioned, in which the two breaking chambers are separated from each other by a partition insulating. The electromagnetic trip unit includes an electromagnet equipped with a striker which acts directly on the fork of the movable contact to accelerate the movement of the latter towards the open position. The striker is coupled mechanically to a moving core of the magnetic circuit of the electromagnet, and acts on the moving contact after catching a dead stroke. The performance of such circuit breaker remain 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 consists in making a circuit breaker with high ratings and with the power to high cutoff.

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 gap of the H-shaped magnetic circuit constituted by two lateral branches magnetized at 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 air gap has 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 core of the fork extends into the horizontal slot of the air 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 circuit magnetic is equipped with two curved extensions extending in parallel according to 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 movable fork contact arrangement in the first air gap allows 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 a characteristic of the invention, the two branches of the magnetic circuit are offset from each other along the axis of movement of the movable contact to obtain an asymmetrical offset of the first air gap making it possible to prolong the effect of the forces of Laplace in the direction of opening.

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 palette of the magnetic circuit is provided with a first flat part and a second enveloping part arranged in look of the branches at the second air gap to adapt the slope of the curve of force applied 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 boítier 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 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 schematic elevation view of a circuit breaker according to the invention, one of the side faces of the insulating housing being removed,
  • FIGS. 2 and 3 are respective sectional views along lines 2-2 and 3-3 of FIG. 1,
  • FIG. 4A shows a partial view on an enlarged scale of the magnetic circuit of the propellant release,
  • FIG. 4B is a section along line 4-4 of FIG. 4A,
  • Figure 5 shows a perspective view of another alternative embodiment of the propellant release.

En référence aux figures 1 à 3, un disjoncteur miniature à haut pouvoir de coupure est logé dans un boítier 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.Referring to Figures 1 to 3, a miniature circuit breaker with high breaking capacity is housed in a housing 10 of molded insulating material, and comprises, by pole, a contact mobile 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 mobile contact 12 in fork is actuated by a mechanism 18 of manual control by a lever 20 and automatic via a thermomagnetic trip device.

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 chambers arc extinction 24, 26 each consisting of a stack of deionization sheets. The thermomagnetic release includes a bimetal thermal release (not shown), and an electromagnetic trip device with propellant 28 disposed above the arc extinguishing 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 trip device 28 has a magnetic circuit 30 H-shaped having a first gap 32 for housing the movable contact 12 in fork, and a second air gap 34 cooperating with a pivoting pallet 36 associated with a trigger member 38. The magnetic circuit 30 has two branches side 37, 39 joined by a central branch 41 on which a coil is wound excitation 40 traversed by the current flowing through the pole contacts.

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 is provided with a common support arm 12A made of insulating material extending vertically into a central slot 42, provided at the upper part of the first air gap 32, and a conductive fork having two parallel arms 12B, 12C connected to a horizontal core 44. Each arm 12B, 12C extends in the direction vertical inside a slot 46, 48 provided at the bottom of the first air gap 32, and cooperates with a fixed contact 14, 16 while being traversed by the current in directions opposites.

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 'air 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 according to opposite polarities.
The magnetic field lines have the same direction in the horizontal slot of the air gap 32 and act on the current in the core 44, so as to generate Laplace forces intended to propel the movable contact 12 towards 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 two other slots 46, 48 are advantageously framed laterally by extensions 50, 52 curved of 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 promotes the magnetic blowing of the arc pulled between each fixed contact 14, 16 and the corresponding arm 12B, 12C of the contact mobile 12, and driven towards the associated extinguishing chamber 24, 26. The connection in series of the two cut-off intervals, and the addition of the elementary forces of Laplace in the first air gap 32 make it possible to obtain a breaking capacity high, and rapid extinction of 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 offset in the axis of movement of the movable contact 12, so as to obtain an asymmetrical offset of the first air gap 32. The magnetic flux passing through the latter acts on the movable contact 12 on a more great length, so as to prolong the effect of the Laplace force in the direction of the 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 at H of the trigger electromagnetic comprises in the second air gap 34 a pivoting pallet 36 composed of a first flat part 36A and a second enveloping part 36B. The distribution of the surfaces between the two parts 36A, 36B makes it possible to adjust with precision the response slope of the force curve acting on the trigger 38 of Figure 1. To obtain a curve with a steep slope, we increases the dimension of the first flat part 36A compared to the second part enveloping 36B. Conversely if the desired change in slope stiffness is located on the end of travel of the pallet 36, the relative width of the first flat part 36A will be weaker compared to the second enveloping part 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 level of the two parts. 36A, 36B of the pallet 36 to adapt the type of force curve.

Claims (6)

Disjoncteur à haut pouvoir de coupure logé dans un boítier (10) en matériau isolant moulé, et comprenant par pôle : deux chambres d'extinction d'arc (24, 26) disposées côte-à-côte dans la partie inférieure du boítier (10), et ayant chacune un empilage de tôles de désionisation, une paire de contacts fixes (14, 16) disposée en regard desdites chambres, et coopérant avec un contact mobile (12) double en forme de fourche pour constituer deux intervalles de coupure connectés électriquement en série, et un mécanisme (18) de commande manuelle par une manette (20) 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 (28) ayant un circuit magnétique (30, 30A, 30B) coopérant avec une palette (36), caractérisé en ce que: le contact mobile (12) en fourche est logé dans un premier entrefer (32) du circuit magnétique (30) en forme de H constitué par deux branches latérales (37, 39) magnétisées selon des polarités opposées par une bobine (40) d'excitation agencée sur une branche centrale (41), la fourche conductrice étant portée par un bras de support (12A) isolant, et comprenant deux bras (12B, 12C) parallèles connectés à une âme (44) horizontale, le premier entrefer (32) comporte une fente (42) centrale dans la branche supérieure (37) pour le passage du bras de support (12A) isolant, et deux autres fentes (46, 48) ménagées aux extrémités de la branche inférieure (39) du circuit magnétique (30) pour le logement des deux bras (12B, 12C) du contact mobile (12), l'âme (44) de la fourche s'étend dans la fente horizontale de l'entrefer (32) entre les deux branches (37, 39), en étant soumise à un champ magnétique unidirectionnel engendré par la bobine (40). Circuit breaker with high breaking capacity housed in a housing (10) made of molded insulating material, and comprising by pole: two arc extinguishing chambers (24, 26) arranged side by side in the lower part of the housing (10), and each having a stack of deionization sheets, a pair of fixed contacts (14, 16) disposed opposite said chambers, and cooperating with a double movable contact (12) in the form of a fork to constitute two cutoff intervals electrically connected in series, and a mechanism (18) for manual control by a joystick (20) and / or automatic by means of triggering means sensitive to the intensity of the current passing through the pole, said means comprising at least one electromagnetic trip device with propellant (28 ) having a magnetic circuit (30, 30A, 30B) cooperating with a pallet (36), characterized in that: the movable fork contact (12) is housed in a first gap (32) of the H-shaped magnetic circuit (30) formed by two lateral branches (37, 39) magnetized according to opposite polarities by a coil (40) of excitation arranged on a central branch (41), the conductive fork being carried by an insulating support arm (12A), and comprising two parallel arms (12B, 12C) connected to a horizontal core (44), the first air gap (32) has a central slot (42) in the upper branch (37) for the passage of the insulating support arm (12A), and two other slots (46, 48) formed at the ends of the lower branch (39 ) 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). Disjoncteur selon la revendication 1, caractérisé en ce que la branche supérieure (37) du circuit magnétique (30) est équipée de deux extensions (50, 52) recourbées s'étendant parallèlement selon la direction des bras (12B, 12C) du contact mobile (12) de manière à encadrer les deux fentes (46, 48) opposées de la branche inférieure (39).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 parallel 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). Disjoncteur selon la revendication 1 ou 2, caractérisé en ce que les deux fentes (46, 48) de la branche inférieure (39) sont symétriques par rapport à l'axe médian passant par la fente centrale (42) de la branche supérieure (37).Circuit breaker according to claim 1 or 2, characterized in that the two slots (46, 48) of the lower branch (39) are symmetrical with respect to the median axis passing through the central slot (42) of the upper branch (37). Disjoncteur selon la revendication 1, caractérisé en ce que les deux branches (37, 39) du circuit magnétique (30A) sont décalées l'une de l'autre le long de l'axe de déplacement du contact mobile (12) pour obtenir un décalage dissymétrique du premier entrefer (32) permettant de prolonger l'effet des forces de Laplace dans le sens de l'ouverture.Circuit breaker according to claim 1, characterized in that the two branches (37, 39) of the magnetic circuit (30A) are offset from each other along the axis of displacement of the movable contact (12) to obtain an asymmetrical offset of the first air gap (32) allowing the effect of Laplace forces to be extended in the direction of the opening. Disjoncteur selon la revendication 1, caractérisé en ce que la palette (36) du circuit magnétique (30B) est pourvue d'une première partie plate (36A) et d'une deuxième partie enveloppante (36B) disposées en regard des branches (37, 39) au niveau du deuxième entrefer (34) pour adapter la pente de la courbe d'effort appliquée à l'organe de déclenchement (38).Circuit breaker according to claim 1, characterized in that the pallet (36) of the circuit magnetic (30B) is provided with a first flat part (36A) and a second enveloping part (36B) arranged opposite the branches (37, 39) at the level of the second air gap (34) to adapt the slope of the force curve applied to the member release (38). Disjoncteur selon la revendication 1, caractérisé en ce que l'organe de déclenchement (38) est formé par une tige assujettie à la palette (36) en s'étendant le long de la branche supérieure (37) du circuit magnétique (30,30A,30B).Circuit breaker according to claim 1, characterized in that the tripping member (38) is formed by a rod secured to the pallet (36) extending along the branch upper (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 true EP0905735A1 (en) 1999-03-31
EP0905735B1 EP0905735B1 (en) 2006-04-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
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
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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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011008832A1 (en) * 2011-01-19 2012-07-19 Abb Ag Service switching device

Citations (6)

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EP0053973A1 (en) * 1980-12-09 1982-06-16 Merlin Gerin Miniature circuit breaker with high rupture capacity
US4656446A (en) * 1985-12-17 1987-04-07 Westinghouse Electric Corp. Current limiting circuit breaker with series double break contact system per pole
EP0635859A1 (en) * 1993-07-19 1995-01-25 Schneider Electric Sa Circuit breaker having an operating mechanism controlled by an electromagnetic actuator
EP0693764A1 (en) * 1994-07-18 1996-01-24 Schneider Electric Sa Electrical circuit breaker with electromagnetic actuator for H.T.
EP0693765A1 (en) * 1994-07-18 1996-01-24 Schneider Electric Sa Electromagnetic actuator for a low tension circuit breaker
DE4445419A1 (en) * 1994-12-20 1996-06-27 Abb Patent Gmbh Electrical load protection switch with electromagnetic release

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EP0053973A1 (en) * 1980-12-09 1982-06-16 Merlin Gerin Miniature circuit breaker with high rupture capacity
US4656446A (en) * 1985-12-17 1987-04-07 Westinghouse Electric Corp. Current limiting circuit breaker with series double break contact system per pole
EP0635859A1 (en) * 1993-07-19 1995-01-25 Schneider Electric Sa Circuit breaker having an operating mechanism controlled by an electromagnetic actuator
EP0693764A1 (en) * 1994-07-18 1996-01-24 Schneider Electric Sa Electrical circuit breaker with electromagnetic actuator for H.T.
EP0693765A1 (en) * 1994-07-18 1996-01-24 Schneider Electric Sa Electromagnetic actuator for a low tension circuit breaker
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
DE69834159T2 (en) 2007-01-04
FR2768856A1 (en) 1999-03-26
EP0905735B1 (en) 2006-04-12
FR2768856B1 (en) 1999-11-12
ES2259451T3 (en) 2006-10-01
DE69834159D1 (en) 2006-05-24

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