EP0635859A1 - Circuit breaker having an operating mechanism controlled by an electromagnetic actuator - Google Patents

Circuit breaker having an operating mechanism controlled by an electromagnetic actuator Download PDF

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Publication number
EP0635859A1
EP0635859A1 EP94410048A EP94410048A EP0635859A1 EP 0635859 A1 EP0635859 A1 EP 0635859A1 EP 94410048 A EP94410048 A EP 94410048A EP 94410048 A EP94410048 A EP 94410048A EP 0635859 A1 EP0635859 A1 EP 0635859A1
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EP
European Patent Office
Prior art keywords
circuit breaker
arm
movable
cover
contact
Prior art date
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Granted
Application number
EP94410048A
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German (de)
French (fr)
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EP0635859B1 (en
Inventor
Alain Schneider Electric Sa Menier
Pascal Schneider Electric SA Mannequin
Eric Schneider Electric SA Domejan
Jean-Yves Amblard
Philippe Schneider Electric SA Delcambre
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Schneider Electric SE
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Schneider Electric SE
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Publication of EP0635859A1 publication Critical patent/EP0635859A1/en
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Publication of EP0635859B1 publication Critical patent/EP0635859B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • 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
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements

Definitions

  • the present invention relates to a circuit breaker comprising at least one pair of separable contacts of which at least one is movable, a control mechanism piloted by at least one electromagnetic propellant, in the air gap of which is disposed a movable arm carrying the movable contact, this arm being arranged to provide an opening function of said separable contacts in the event of a short circuit.
  • Such a circuit breaker is known for example from the German patent N o 942 455.
  • This patent discloses the principle of electrodynamic propellants which ensure good breaking of the circuit breakers, in particular of high ratings which have only a small number of turns, sometimes even a single turn, thanks to a quick tilting of the movable contact arm.
  • This tilting is due to the electrodynamic repulsion defined by Laplace's law applied to the contact arm traversed by a current and disposed between the poles of the magnetic circuit.
  • this repulsion is greatly amplified thanks to the very strong field prevailing in the air gap of the magnetic circuit.
  • the performance of the system is all the more important as the length of the arm of the movable contact traversed by the current is greater. Now it turns out that the root of the arc tends to make a retrograde movement on this arm, which has the effect of greatly reducing the moments of the repulsive forces, by reducing the length of the arm traversed by the current.
  • the present invention proposes to overcome this drawback by providing a circuit breaker in which retrograde movement of the root of the arc is prevented, whatever the origin of the recoil.
  • circuit breaker characterized in that said movable arm is equipped with an insulating or electrically weakly conductive cover, formed at the rear of said movable contact, that the fixed contact is arranged at one end of the air gap, and that the contact arm is pivotally mounted about an axis located opposite the fixed contact, the cover extending between the movable contact and said axis, and being made of a material having a resistance high thermal.
  • any retrograde movement of the arc along the contact arm is inhibited by the presence of the insulating cover.
  • the arc remains anchored on the movable contact so as to maintain the optimal length traveled by the current in the air gap.
  • the cover consists of a molded piece of insulating synthetic material, in particular of polyamide amide.
  • this cover is constituted by a part shaped from an electrically weakly conductive material, such as, for example, steel.
  • the circuit breaker 10 shown diagrammatically comprises an input terminal 11, an output terminal 12 and a manual control handle 13, these elements being housed in a housing 14 provided with a base 15 which allows the mounting of this circuit breaker on appropriate supports of an electrical panel. It further comprises a fixed contact 16 and a movable contact 17 which is carried by a movable arm 18.
  • a bimetal thermal trip device 20 is connected by a link 19 to the trip lever 21 of the latching control mechanism 22.
  • the control mechanism 22 is linked to the movable arm 18 for the opening of the contacts, either following a manual intervention on the lever 13, or following a triggering caused by the bimetallic strip 20, or under the effect of a electrodynamic repulsion of the movable arm 18 in the event of a short circuit.
  • FIG. 2 illustrates the propellant 24 with a magnetic circuit 25 intended to actuate the movable arm 18 by electrodynamic repulsion in the event of a short circuit.
  • This magnetic circuit 25 comprises two pole pieces 30 and 31 defining an air gap 32 in which is housed the movable arm 18 which carries the movable contact 17, and a core 33 carrying one or more turns of a winding 34 traversed by the current.
  • the very intense field which prevails in the air gap 32 exerts significant electromagnetic forces on the arm mobile 18 which pivots about its axis 35, which has the effect of opening the separable contacts 16, 17.
  • the arm 18 is equipped with a cover 40 (see figure 2) or 41 (see figure 3) which is arranged at the rear of the movable contact 17 on the movable arm 18.
  • This cover can be produced in the form of a molded part made of an insulating synthetic material. It can also be produced by machining or folding a part from a weakly conductive material such as certain steels.
  • the movable arm 18 can have different shapes and the cover 40 can come in various variant embodiments which are adapted to the different shapes of the movable arm. This is for example the case of the embodiments shown respectively in FIGS. 2 and 3.
  • the root of the electric arc tends to move to an area for which the path of the arc is shorter. If one wishes to avoid such a displacement and maintain this root on the movable contact, it is essential to isolate the neighboring zones whose distance to the fixed contact decreases during the tilting of the movable arm. This insulation is obtained thanks to the cover 40, 41 described above.
  • the positioning of the contacts 16, 17 relative to the propellant 24 is such that the pad of the fixed contact 16 is arranged in the vicinity of the lower part of the air gap 32.
  • the middle of the pad is substantially in the frontal plane of pole pieces 30, 31, half of the patch being inserted in the air gap 32, and the other half projecting outward.
  • the width of the pad of the fixed contact 16 is less than the thickness of the air gap 32, and substantially equal to the sum of the width of the contact arm 18 and of the insulating cover 40.
  • the width of the contact arm 18 movable in the air gap 32 is thus reduced to a minimum, which also makes it possible to reduce the size of the magnetic circuit 25.
  • the thermal resistance of the insulating material used for the cover 40 must withstand temperatures greater than 350 °.
  • a particularly advantageous insulating material is the polyamide amide, which can be used in the form of a very thin film.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

The present invention relates to a circuit breaker comprising at least one pair of separable contacts at least one of which is movable, a control mechanism with lock-on driven by at least one electromagnetic thruster, in the gap of which a movable arm is arranged carrying the said moving contact, this arm being arranged to carry out its supplementary function of opening of the said separable contacts in the event of a short-circuit. The moving support arm (18) of the moving contact (17) is equipped with a screen (40) which is arranged to the rear of the said moving contact. It is produced either as a component moulded from synthetic material, or as a machined or folded component made from a material which is a poor electrical conductor. The screen is for the purpose of avoiding a backwards movement of the root of the arc in the event of a short-circuit. <IMAGE>

Description

La présente invention concerne un disjoncteur comprenant au moins une paire de contacts séparables dont au moins un est mobile, un mécanisme de commande piloté par au moins un propulseur électromagnétique, dans l'entrefer duquel est disposé un bras mobile portant le contact mobile, ce bras étant agencé pour assurer une fonction d'ouverture desdits contacts séparables en cas de court-circuit.The present invention relates to a circuit breaker comprising at least one pair of separable contacts of which at least one is movable, a control mechanism piloted by at least one electromagnetic propellant, in the air gap of which is disposed a movable arm carrying the movable contact, this arm being arranged to provide an opening function of said separable contacts in the event of a short circuit.

Un tel disjoncteur est connu par exemple par le brevet allemand Nº 942 455. Ce brevet divulgue le principe des propulseurs électrodynamiques qui assurent une bonne coupure des disjoncteurs, notamment des calibres élevés qui ne possèdent qu'un nombre peu important de spires, parfois même une spire unique, grâce à un basculement rapide du bras de contact mobile. Ce basculement est dû à la répulsion électrodynamique définie par la loi de Laplace appliquée au bras de contact parcouru par un courant et disposé entre les pôles du circuit magnétique. En cas de court-circuit générant un arc électrique entre les deux contacts séparables, cette répulsion est fortement amplifiée grâce au champ très fort régnant dans l'entrefer du circuit magnétique.Such a circuit breaker is known for example from the German patent N º 942 455. This patent discloses the principle of electrodynamic propellants which ensure good breaking of the circuit breakers, in particular of high ratings which have only a small number of turns, sometimes even a single turn, thanks to a quick tilting of the movable contact arm. This tilting is due to the electrodynamic repulsion defined by Laplace's law applied to the contact arm traversed by a current and disposed between the poles of the magnetic circuit. In the event of a short circuit generating an electric arc between the two separable contacts, this repulsion is greatly amplified thanks to the very strong field prevailing in the air gap of the magnetic circuit.

La performance du système est d'autant plus importante que la longueur du bras du contact mobile parcourue par le courant est plus importante. Or il se trouve que la racine de l'arc à tendance à effectuer un déplacement rétrograde sur ce bras, ce qui a pour effet de réduire fortement les moments des forces répulsives, en réduisant la longueur du bras parcourue par le courant.The performance of the system is all the more important as the length of the arm of the movable contact traversed by the current is greater. Now it turns out that the root of the arc tends to make a retrograde movement on this arm, which has the effect of greatly reducing the moments of the repulsive forces, by reducing the length of the arm traversed by the current.

La présente invention se propose de pallier cet inconvénient en réalisant un disjoncteur dans lequel on empêche le déplacement rétrograde de la racine de l'arc, quelle que soit l'origine du recul.The present invention proposes to overcome this drawback by providing a circuit breaker in which retrograde movement of the root of the arc is prevented, whatever the origin of the recoil.

Ce but est atteint par le disjoncteur selon l'invention, caractérisé en ce que ledit bras mobile est équipé d'un cache isolant ou électriquement faiblement conducteur, ménagé à l'arrière dudit contact mobile, que le contact fixe est agencé à une extrémité de l'entrefer, et que le bras de contact est monté à pivotement autour d'un axe situé à l'opposé du contact fixe, le cache s'étendant entre le contact mobile et ledit axe, et étant réalisé en un matériau ayant une résistance thermique élevée.This object is achieved by the circuit breaker according to the invention, characterized in that said movable arm is equipped with an insulating or electrically weakly conductive cover, formed at the rear of said movable contact, that the fixed contact is arranged at one end of the air gap, and that the contact arm is pivotally mounted about an axis located opposite the fixed contact, the cover extending between the movable contact and said axis, and being made of a material having a resistance high thermal.

Tout déplacement rétrograde de l'arc le long du bras de contact est inhibé par la présence du cache isolant. L'arc reste ancré sur le contact mobile de manière à conserver la longueur optimale parcourue par le courant dans l'entrefer.Any retrograde movement of the arc along the contact arm is inhibited by the presence of the insulating cover. The arc remains anchored on the movable contact so as to maintain the optimal length traveled by the current in the air gap.

Selon un mode de réalisation avantageux, le cache est constitué par une pièce moulée en matière synthétique isolante, notamment en polyamide amide.According to an advantageous embodiment, the cover consists of a molded piece of insulating synthetic material, in particular of polyamide amide.

Selon un autre mode de réalisation, ce cache est constitué par une pièce façonnée en un matériau électriquement faiblement conducteur, tel que, par exemple, de l'acier.According to another embodiment, this cover is constituted by a part shaped from an electrically weakly conductive material, such as, for example, steel.

La présente invention sera mieux comprise en référence à la description d'un mode de réalisation préféré donné à titre d'exemple non limitatif et aux dessins annexés dans lesquels :

  • la figure 1 représente une vue schématique d'un disjoncteur selon l'invention,
  • la figure 2 représente une vue en perspective du bras mobile placé dans l'entrefer du propulseur du disjoncteur, et
  • la figure 3 représente une vue en perspective d'un bras du contact mobile équipé d'un cache isolant ou électriquement faiblement conducteur.
The present invention will be better understood with reference to the description of a preferred embodiment given by way of nonlimiting example and to the accompanying drawings in which:
  • Figure 1 shows a schematic view of a circuit breaker according to the invention,
  • FIG. 2 represents a perspective view of the movable arm placed in the air gap of the circuit breaker propellant, and
  • FIG. 3 represents a perspective view of an arm of the movable contact equipped with an insulating or electrically weakly conducting cover.

En référence aux figures, le disjoncteur 10 représenté schématiquement comporte une borne d'entrée 11, une borne de sortie 12 et une manette de commande manuelle 13, ces éléments étant logés dans un boîtier 14 pourvu d'un socle 15 qui permet le montage de ce disjoncteur sur des supports appropriés d'un tableau électrique. Il comporte en outre un contact fixe 16 et un contact mobile 17 qui est porté par un bras mobile 18. Un déclencheur thermique à bilame 20 est relié par une biellette 19 au levier de déclenchement 21 du mécanisme 22 de commande à accrochage. Le mécanisme 22 de commande est lié au bras mobile 18 en vue de l'ouverture des contacts, soit suite à une intervention manuelle sur la manette 13, soit suite à un déclenchement provoqué par le bilame 20, soit sous l'effet d'une répulsion électrodynamique du bras mobile 18 en cas de court-circuit.With reference to the figures, the circuit breaker 10 shown diagrammatically comprises an input terminal 11, an output terminal 12 and a manual control handle 13, these elements being housed in a housing 14 provided with a base 15 which allows the mounting of this circuit breaker on appropriate supports of an electrical panel. It further comprises a fixed contact 16 and a movable contact 17 which is carried by a movable arm 18. A bimetal thermal trip device 20 is connected by a link 19 to the trip lever 21 of the latching control mechanism 22. The control mechanism 22 is linked to the movable arm 18 for the opening of the contacts, either following a manual intervention on the lever 13, or following a triggering caused by the bimetallic strip 20, or under the effect of a electrodynamic repulsion of the movable arm 18 in the event of a short circuit.

La figure 2 illustre le propulseur 24 à circuit magnétique 25 destiné à actionner le bras mobile 18 par répulsion électrodynamique en cas de court-circuit. Ce circuit magnétique 25 comporte deux pièces polaires 30 et 31 définissant un entrefer 32 dans lequel est logé le bras mobile 18 qui porte le contact mobile 17, et un noyau 33 portant une ou plusieurs spires d'un enroulement 34 parcouru par le courant. En cas de court-circuit, le champ très intense qui règne dans l'entrefer 32 exerce des forces électromagnétiques importantes sur le bras mobile 18 qui pivote autour de son axe 35, ce qui a pour effet l'ouverture des contacts 16, 17 séparables.FIG. 2 illustrates the propellant 24 with a magnetic circuit 25 intended to actuate the movable arm 18 by electrodynamic repulsion in the event of a short circuit. This magnetic circuit 25 comprises two pole pieces 30 and 31 defining an air gap 32 in which is housed the movable arm 18 which carries the movable contact 17, and a core 33 carrying one or more turns of a winding 34 traversed by the current. In the event of a short circuit, the very intense field which prevails in the air gap 32 exerts significant electromagnetic forces on the arm mobile 18 which pivots about its axis 35, which has the effect of opening the separable contacts 16, 17.

Pour éviter une migration de la racine de l'arc vers l'arrière du bras mobile 18, c'est-à-dire du contact mobile 17 vers l'axe 35, ce qui aurait pour effet de réduire la longueur utile du bras dans l'entrefer 32, c'est-à-dire celle qui est parcourue par le courant de court-circuit générant les forces électromagnétiques de Laplace, le bras 18 est équipé d'un cache 40 (voir figure 2) ou 41 (voir figure 3) qui est disposé à l'arrière du contact mobile 17 sur le bras mobile 18. Ce cache peut être réalisé sous forme d'une pièce moulée en une matière synthétique isolante. Il peut également être réalisé par usinage ou pliage d'une pièce en un matériau faiblement conducteur tel que certains aciers. Le bras mobile 18 peut avoir différentes formes et le cache 40 peut se présenter sous diverses variantes de réalisation qui sont adaptées aux différentes formes du bras mobile. C'est par exemple le cas des réalisations représentées respectivement par les figures 2 et 3.To avoid migration of the root of the arc towards the rear of the movable arm 18, that is to say from the movable contact 17 towards the axis 35, which would have the effect of reducing the useful length of the arm in the air gap 32, that is to say that which is traversed by the short-circuit current generating the electromagnetic forces of Laplace, the arm 18 is equipped with a cover 40 (see figure 2) or 41 (see figure 3) which is arranged at the rear of the movable contact 17 on the movable arm 18. This cover can be produced in the form of a molded part made of an insulating synthetic material. It can also be produced by machining or folding a part from a weakly conductive material such as certain steels. The movable arm 18 can have different shapes and the cover 40 can come in various variant embodiments which are adapted to the different shapes of the movable arm. This is for example the case of the embodiments shown respectively in FIGS. 2 and 3.

La racine de l'arc électrique a tendance à se déplacer vers une zone pour laquelle le chemin de l'arc est plus court. Si l'on veut éviter un tel déplacement et maintenir cette racine sur le contact mobile, il est indispensable d'isoler les zones voisines dont la distance au contact fixe diminue lors du basculement du bras mobile. Cette isolation est obtenue grâce au cache 40, 41 décrit ci-dessus.The root of the electric arc tends to move to an area for which the path of the arc is shorter. If one wishes to avoid such a displacement and maintain this root on the movable contact, it is essential to isolate the neighboring zones whose distance to the fixed contact decreases during the tilting of the movable arm. This insulation is obtained thanks to the cover 40, 41 described above.

En référence aux figures 4 à 6, le positionnement des contacts 16, 17 par rapport au propulseur 24 est tel que la pastille du contact fixe 16 est agencée au voisinage de la partie inférieure de l'entrefer 32. Le milieu de la pastille se trouve sensiblement dans le plan frontal des pièces polaires 30, 31, la moitié de la pastille étant insérée dans l'entrefer 32, et l'autre moitié faisant saillie vers l'extérieur.Referring to Figures 4 to 6, the positioning of the contacts 16, 17 relative to the propellant 24 is such that the pad of the fixed contact 16 is arranged in the vicinity of the lower part of the air gap 32. The middle of the pad is substantially in the frontal plane of pole pieces 30, 31, half of the patch being inserted in the air gap 32, and the other half projecting outward.

La largeur de la pastille du contact fixe 16 est inférieure à l'épaisseur de l'entrefer 32, et sensiblement égale à la somme de la largeur du bras de contact 18 et du cache 40 isolant. La largeur du bras de contact 18 mobile dans l'entrefer 32 est ainsi réduit au minimum, ce qui permet également de réduire l'encombrement du circuit magnétique 25.The width of the pad of the fixed contact 16 is less than the thickness of the air gap 32, and substantially equal to the sum of the width of the contact arm 18 and of the insulating cover 40. The width of the contact arm 18 movable in the air gap 32 is thus reduced to a minimum, which also makes it possible to reduce the size of the magnetic circuit 25.

La tenue thermique du matériau isolant utilisé pour le cache 40 doit résister à des températured supérieures à 350°. Un matériau isolant particulièrement avantageux est le polyamide amide, utilisable sous forme de pellicule très mince.The thermal resistance of the insulating material used for the cover 40 must withstand temperatures greater than 350 °. A particularly advantageous insulating material is the polyamide amide, which can be used in the form of a very thin film.

Claims (7)

1. Disjoncteur comprenant au moins une paire de contacts séparables (16, 17) dont au moins un (17) est mobile, un mécanisme (22) de commande piloté par au moins un propulseur (24) électromagnétique ayant un circuit magnétique (25), dans l'entrefer (32) duquel est disposé un bras mobile portant ledit contact mobile, ce bras étant agencé pour assurer une fonction d'ouverture desdits contacts séparables en cas de court-circuit,
caractérisé en ce que ledit bras mobile (18) est équipé d'un cache (40, 41) isolant ou électriquement faiblement conducteur, ménagé à l'arrière dudit contact mobile (17), que le contact fixe (16) est agencé à une extrémité de l'entrefer 32, et que le bras de contact (18) est monté à pivotement autour d'un axe (35) situé à l'opposé du contact fixe (16), le cache (40, 41) s'étendant entre le contact mobile (17) et ledit axe (35), et étant réalisé en un matériau ayant une résistance thermique élevée. 1. Circuit breaker comprising at least one pair of separable contacts (16, 17) of which at least one (17) is movable, a control mechanism (22) controlled by at least one electromagnetic thruster (24) having a magnetic circuit (25) , in the air gap (32) of which is disposed a movable arm carrying said movable contact, this arm being arranged to ensure an opening function of said separable contacts in the event of a short circuit,
characterized in that said movable arm (18) is fitted with an insulating or electrically weakly conductive cover (40, 41), provided at the rear of said movable contact (17), that the fixed contact (16) is arranged at a end of the air gap 32, and that the contact arm (18) is pivotally mounted about an axis (35) located opposite the fixed contact (16), the cover (40, 41) extending between the movable contact (17) and said axis (35), and being made of a material having a high thermal resistance. 2. Disjoncteur selon la revendication 1, caractérisé en ce que ledit cache (40, 41) est constitué d'une pièce moulée en matière synthétique isolante. 2. Circuit breaker according to claim 1, characterized in that said cover (40, 41) consists of a molded piece of insulating synthetic material. 3. Disjoncteur selon la revendication 1, caractérisé en ce que ledit cache (40, 41) est constitué d'une pièce usinée en un matériau faiblement conducteur. 3. Circuit breaker according to claim 1, characterized in that said cover (40, 41) consists of a workpiece made of a weakly conductive material. 4. Disjoncteur selon la revendication 3, caractérisé en ce que ladite pièce usinée est réalisée en acier. 4. Circuit breaker according to claim 3, characterized in that said machined part is made of steel. 5) Disjoncteur selon l'une des revendications 1 à 4, caractérisé en ce que le milieu de la pastille formant le contact fixe 16 se trouve sensiblement dans le plan frontal des pièces polaires (30, 31), la moitié de la pastille étant insérée dans l'entrefer (32), et l'autre moitié faisant saillie vers l'extérieur. 5) Circuit breaker according to one of claims 1 to 4, characterized in that the middle of the pad forming the fixed contact 16 is located substantially in the frontal plane of the pole pieces (30, 31), half of the pad being inserted in the air gap (32), and the other half projecting outwards. 6) Disjoncteur selon la revendication 5, caractérisé en ce que la largeur de la pastille du contact fixe 16 est inférieure à l'épaisseur de l'entrefer 32, et sensiblement égale à la somme des épaisseurs du bras de contact 18 et du cache 40 isolant. 6) Circuit breaker according to claim 5, characterized in that the width of the pad of the fixed contact 16 is less than the thickness of the air gap 32, and substantially equal to the sum of the thicknesses of the contact arm 18 and the cover 40 insulating. 7) Disjoncteur selon la revendication 2 ou 6, caractérisé en ce que le matériau isolant du cache 40 est à base de polyamide amide. 7) A circuit breaker according to claim 2 or 6, characterized in that the insulating material of the cover 40 is based on polyamide amide.
EP19940410048 1993-07-19 1994-07-08 Circuit breaker having an operating mechanism controlled by an electromagnetic actuator Expired - Lifetime EP0635859B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308933A FR2708140B1 (en) 1993-07-19 1993-07-19 Circuit breaker provided with a pilot hooking control mechanism by an electromagnetic thruster.
FR9308933 1993-07-19

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EP0635859A1 true EP0635859A1 (en) 1995-01-25
EP0635859B1 EP0635859B1 (en) 1998-12-23

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DE (1) DE69415426T2 (en)
FR (1) FR2708140B1 (en)

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WO1997001859A1 (en) * 1995-06-26 1997-01-16 Square D Company Arc-resistant shield for protecting a movable contact carrier of a circuit breaker
FR2768856A1 (en) * 1997-09-24 1999-03-26 Schneider Electric Sa ELECTROMAGNETIC TRIGGER CIRCUIT BREAKER WITH MOBILE FORK CONTACT PROPELLER
CN102568964A (en) * 2012-03-08 2012-07-11 江苏辉能电气有限公司 Protection assembly of movable static contact of plastic shell breaker
CN104576247A (en) * 2015-01-05 2015-04-29 无锡新宏泰电器科技股份有限公司 Falling-prevention single-break contact operation mechanism

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CN104576246B (en) * 2014-12-31 2017-03-29 上海永继电气股份有限公司 The moving contact component and its manufacture method of miniature circuit breaker
CN108766845B (en) * 2018-08-20 2024-03-19 厦门大恒科技有限公司 Hydraulic electromagnet structure and circuit breaker

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FR883446A (en) * 1941-07-12 1943-07-05 Licentia Gmbh Over-current circuit breaker
DE942455C (en) * 1941-07-12 1956-05-03 Aeg Electrical overcurrent switch for alternating current
US4546337A (en) * 1983-09-02 1985-10-08 Eaton Corporation Residential circuit breaker with one piece slot motor
US4791393A (en) * 1983-12-19 1988-12-13 Westinghouse Electric Corp. Molded case circuit breaker with movable upper electrical contact positioned by torsion springs

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FR883446A (en) * 1941-07-12 1943-07-05 Licentia Gmbh Over-current circuit breaker
DE942455C (en) * 1941-07-12 1956-05-03 Aeg Electrical overcurrent switch for alternating current
US4546337A (en) * 1983-09-02 1985-10-08 Eaton Corporation Residential circuit breaker with one piece slot motor
US4791393A (en) * 1983-12-19 1988-12-13 Westinghouse Electric Corp. Molded case circuit breaker with movable upper electrical contact positioned by torsion springs

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997001859A1 (en) * 1995-06-26 1997-01-16 Square D Company Arc-resistant shield for protecting a movable contact carrier of a circuit breaker
FR2768856A1 (en) * 1997-09-24 1999-03-26 Schneider Electric Sa ELECTROMAGNETIC TRIGGER CIRCUIT BREAKER WITH MOBILE FORK CONTACT PROPELLER
EP0905735A1 (en) * 1997-09-24 1999-03-31 Schneider Electric Sa Circuit breaker with electromagnetic trip device with actation for a mobile forked contact
CN102568964A (en) * 2012-03-08 2012-07-11 江苏辉能电气有限公司 Protection assembly of movable static contact of plastic shell breaker
CN102568964B (en) * 2012-03-08 2014-03-19 江苏辉能电气有限公司 Protection assembly of movable static contact of plastic shell breaker
CN104576247A (en) * 2015-01-05 2015-04-29 无锡新宏泰电器科技股份有限公司 Falling-prevention single-break contact operation mechanism

Also Published As

Publication number Publication date
DE69415426D1 (en) 1999-02-04
FR2708140B1 (en) 1995-09-01
EP0635859B1 (en) 1998-12-23
FR2708140A1 (en) 1995-01-27
DE69415426T2 (en) 1999-06-10

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