EP0589779B1 - Magnetic blow-out circuit breaker - Google Patents

Magnetic blow-out circuit breaker Download PDF

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Publication number
EP0589779B1
EP0589779B1 EP93402305A EP93402305A EP0589779B1 EP 0589779 B1 EP0589779 B1 EP 0589779B1 EP 93402305 A EP93402305 A EP 93402305A EP 93402305 A EP93402305 A EP 93402305A EP 0589779 B1 EP0589779 B1 EP 0589779B1
Authority
EP
European Patent Office
Prior art keywords
arm
circuit breaker
arc
section
contact component
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
EP93402305A
Other languages
German (de)
French (fr)
Other versions
EP0589779A1 (en
Inventor
Jean-Pierre Guery
Jean-Luc Mertz
Jacques Olifant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Schneider Electric SE
Original Assignee
Merlin Gerin SA
Schneider Electric SE
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Publication date
Application filed by Merlin Gerin SA, Schneider Electric SE filed Critical Merlin Gerin SA
Publication of EP0589779A1 publication Critical patent/EP0589779A1/en
Application granted granted Critical
Publication of EP0589779B1 publication Critical patent/EP0589779B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H01H9/465—Shunt circuit closed by transferring the arc onto an auxiliary electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H2089/065—Coordination between protection and remote control, e.g. protection job repartition, mutual assistance or monitoring
    • 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
    • H01H71/121—Protection of release mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device

Definitions

  • the present invention relates to an electric circuit breaker with magnetic blowing comprising separable contacts respectively located on a fixed contact piece and on a movable contact piece, the latter being subject to a control mechanism in particular triggerable in the event of overcurrent.
  • Patent EP-104 981 describes a circuit breaker-contactor device, the circuit breaker part of which comprises separable mechanical contacts, these contacts being placed in series with a static switch which constitutes the contactor part of the device.
  • the contacts are associated with an arc electrode connected to a bypass circuit of the static switch.
  • the bypass circuit is designed to capture the arc as soon as the contacts open in order to protect the static switch.
  • the magnetic blowing of the arc deserves in certain cases to be accentuated to improve the quality of cutting but the measures which can be taken to improve the cutting are hardly compatible with the architecture of the device and , in particular, with the fact that the static switch is integrated in the device.
  • the object of the invention is in particular to provide in an easy manner an excellent quality of breaking in an electromagnetic circuit breaker.
  • the deflecting branch which may or may not be in the extension of the branch carrying the fixed contact, and by the presence of the ferromagnetic part between the branches of the folded part, a satisfactory magnetic blowing is obtained. of the arc even when it has crossed the isolation gap between the two parts of the fixed contact part; the deflecting branch of the fixed contact part can advantageously be connected to an auxiliary terminal of the circuit breaker, preferably accessible from the front.
  • FIG. 1 shows an electrical circuit breaker 10 which comprises, in a housing 11, an electromechanical breaking member provided with a movable contact piece 20 and with a fixed contact piece 30.
  • the movable contact piece 20 carries the actual movable contact 21 and it is connected by appropriate conductors to an upstream terminal 22 of the circuit breaker and from there by external cables to a source of low voltage electrical energy 23.
  • the term circuit breaker covers here any device of the circuit breaker type, in particular circuit breakers-contactors or other associations of a circuit breaker with another electrical device.
  • the fixed contact piece 30 comprises two parts 31, 32 electrically isolated from each other by an isolation gap 33.
  • the main part 31 of the piece 30 carries the fixed contact itself 34 and belongs to a normal path. of current C1; the auxiliary part 32 of the part 30 belongs to an auxiliary current path C2; the paths C1 then C2 are traversed by the current respectively when the contacts 21, 34 are closed and then during their transient opening phase; in the latter case, the arc generated between the contacts jumps from part 31 to part 32, crossing the insulating gap 33; the successive phases of the arc phenomenon are indicated in A1, A2, A3.
  • the respective parts 31, 32 of the fixed contact part 30 are both in the approximate shape of J and thus each comprise, for the purpose of driving the arc towards the breaking chamber 45, a neighboring branch 35, 36 of the movable contact and substantially parallel to the part 20.
  • the branches 35, 36 are traversed by a current i 31 , respectively i 32 in the opposite direction to the current i 20 in the neighboring part - arm or bridge - of movable contact 20, and this respectively in the closed state and in the transient opening phase.
  • the normal current path C1 connects the main part 31 of the fixed contact part 30 to a first downstream terminal 37 of the circuit breaker and from there by an external cable to an upstream terminal 38 of a member 40 to be protected - such as a static switch, contactor or other load -.
  • the auxiliary current path C2 connects the auxiliary part 32 of the part 30 to a second downstream terminal 37 'or auxiliary terminal of the circuit breaker; the terminal 37 'is connected by an external cable to a downstream terminal 39 of the member 40.
  • the movable contact piece 20 is connected to the upstream terminal 22 of the circuit breaker via a magnetic or magnetothermal trip member 42 which, via a mechanism 43 controls the opening of the contacts as soon as it detects an overcurrent.
  • a control button 44 also makes it possible to open and close the contacts.
  • the circuit breaker comprises for movable contact piece 20 a double-cut bridge displaceable in translation according to arrow B.
  • the deflector branch 36 of part 32 is contiguous with a cut-off chamber 45 containing arc splitting fins 46.
  • the part 31 comprises a branch 47 for connection with the terminal 37, parallel to the branch 35 which carries the fixed contact and connected to this branch by a perpendicular branch 48.
  • the part 32 comprises a branch 49 of connection with the other elements of the bypass path C2.
  • the branch 49 is parallel to the deflecting branch 36 and is connected to it by a fold or a perpendicular branch 50 obtained by folding.
  • An air space is provided or an insulating part 51, for example a thin insulating layer, can be inserted between the branches 36, 49, as well as a ferromagnetic part 52 aimed at improving the magnetic induction produced by the current in the branch 36.
  • an air space or a dielectric layer 53 Between the branches 47,49, there is an air space or a dielectric layer 53.
  • the branch 35 of the part 31 which carries the fixed contact enters an opening 54 of the deflecting branch 36 of the part 32.
  • An insulating layer 55 is interposed near the edge of the opening between the branches 35.36.
  • the circuit breaker shown operates as follows. It is assumed that initially the contacts are closed, the current passing through the path C1. When an overcurrent is detected by the magnetothermal member 42, the latter reacts and the mechanism 43 controls the opening of the contacts. The arc which appears between the contacts 21,34 (state A1) moves to the right (figure 1) and skips the insulating interval 33 (state A2). The opening current then follows the bypass path C2; as it flows in the deflecting branch 36 in the opposite direction to its path in the movable contact piece 20 (state A3), this results in a magnetic induction which tends to continue blowing the arc to the right (FIG. 1 ) and therefore to the fractionation fins.
  • FIG. 6 shows an example of association of the circuit breaker 10 with a contactor 40.
  • the contactor 40 comprises a switch 56 of the separable contact type or of the static type controlled by a member 57 of the electromagnetic or respectively electronic type.
  • the control member 57 is connected to control terminals A1, A2.
  • the downstream terminals 37 and 37 'of the circuit breaker are wired respectively to the upstream terminals 38 and downstream 39 of the contactor.
  • the terminals 22, 37, 37 ′, 38, 39 of the same pole are accessible frontally and advantageously located in a plane P perpendicular to the front faces of the circuit breaker and of the contactor, which allows the user to benefit from the good breaker cut-out quality a variable gauge contactor easy to connect to the circuit breaker.
  • the circuit breaker is associated with a contactor 40.
  • the circuit breaker comprises a movable contact bridge 20 which has two contacts 20a, 20b to cooperate with respective fixed contacts 34a, 34b carried by parts of fixed contact 30a, 30b.
  • Each of these comprises two parts 31a; 31b and 32a; 32b in the form of J, contiguous and mutually isolated by an insulating gap 33a; 33b, in the vicinity of cooling and arc splitting fins 46a, 46b.
  • the main downstream 37 and auxiliary 37 'downstream terminals are respectively connected to the parts 31b, 32b of the fixed part 30b and are wired, as described above, to the terminals 38, 39 of the contactor.
  • the parts 31a, 32a of the fixed part 30a are connected to the main upstream terminal 22 and respectively to an auxiliary upstream terminal 22 '.
  • a current limiting impedance Z is disposed between the upstream terminals 22,22 '. An opening of the contacts following a short circuit therefore causes the transient commissioning, that is to say during the duration of the arcing phenomenon, of the circuit terminal 22 - impedance Z - terminal 22 ', and therefore a limitation arc current.
  • the device can be composed of a circuit breaker 10 to which the contactor 40 is connected by plugging in according to arrow F (FIG. 8).
  • the contactor 40 has an upstream pin 38 and a downstream pin 39 connectable to respective downstream terminals 57,58.
  • the terminal 58 is connected on the one hand to a terminal 50 for connection with the charging circuit, on the other hand to the part 32 of the fixed contact part 30 by the path C2.
  • Terminal 57 is connected to part 31 by the auxiliary path C1.
  • the invention is applicable to single or double break circuit breakers, which can be combined with electromechanical or static contactors.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

La présente invention concerne un disjoncteur électrique à soufflage magnétique comprenant des contacts séparables respectivement situés sur une pièce de contact fixe et sur une pièce de contact mobile, cette dernière étant assujettie à un mécanisme de commande notamment déclenchable en cas de surintensité.The present invention relates to an electric circuit breaker with magnetic blowing comprising separable contacts respectively located on a fixed contact piece and on a movable contact piece, the latter being subject to a control mechanism in particular triggerable in the event of overcurrent.

Le brevet EP-104 981 décrit un appareil disjoncteur-contacteur dont la partie disjoncteur comprend des contacts mécaniques séparables, ces contacts étant mis en série avec un interrupteur statique qui constitue la partie contacteur de l'appareil. Aux contacts est associée une électrode d'arc reliée à un circuit de dérivation de l'interrupteur statique. Le circuit de dérivation est agencé pour capter l'arc dès l'ouverture des contacts afin de protéger l'interrupteur statique. Dans cet appareil, le soufflage magnétique de l'arc mérite dans certains cas d'être accentué pour améliorer la qualité de coupure mais les dispositions susceptibles d'être prises pour améliorer la coupure ne sont guère compatibles avec l'architecture de l'appareil et, en particulier, avec le fait que l'interrupteur statique est intégré à l'appareil.Patent EP-104 981 describes a circuit breaker-contactor device, the circuit breaker part of which comprises separable mechanical contacts, these contacts being placed in series with a static switch which constitutes the contactor part of the device. The contacts are associated with an arc electrode connected to a bypass circuit of the static switch. The bypass circuit is designed to capture the arc as soon as the contacts open in order to protect the static switch. In this device, the magnetic blowing of the arc deserves in certain cases to be accentuated to improve the quality of cutting but the measures which can be taken to improve the cutting are hardly compatible with the architecture of the device and , in particular, with the fact that the static switch is integrated in the device.

L'invention a notamment pour but de procurer de manière simple une excellente qualité de coupure dans un disjoncteur électromagnétique.The object of the invention is in particular to provide in an easy manner an excellent quality of breaking in an electromagnetic circuit breaker.

Elle a aussi pour but de faire bénéficier de cette coupure améliorée un appareil disposé en série avec les contacts séparables et facilement raccordable au disjoncteur.It also aims to benefit from this improved cut-off device arranged in series with separable contacts and easily connectable to the circuit breaker.

L'invention concerne un disjoncteur à soufflage magnétique, comprenant :

  • au moins un contact fixe et un contact mobile séparables et situés respectivement sur une pièce de contact fixe et une pièce de contact mobile, la pièce de contact mobile étant assujettie à un mécanisme de commande notamment déclenchable en cas de surintensité,
  • la pièce de contact fixe étant reliée à un organe électrique à protéger et comprenant une deuxième partie conductrice qui est attenante à une première partie conductrice reliée au contact fixe tout en étant électriquement isolée d'elle par un intervalle isolant propre au saut d'arc, et qui comprend un branche déflectrice d'arc contiguë à une chambre de coupure
The invention relates to a magnetic blow circuit breaker, comprising:
  • at least one fixed contact and one movable contact separable and situated respectively on a fixed contact piece and a movable contact piece, the movable contact piece being subject to a control mechanism in particular triggerable in the event of overcurrent,
  • the fixed contact part being connected to an electrical member to be protected and comprising a second conductive part which is attached to a first conductive part connected to the fixed contact while being electrically isolated from it by an insulating gap specific to the arc jump, and which comprises an arc deflecting branch contiguous to a breaking chamber

Selon l'invention :

  • la première partie conductrice comporte au voisinage de la pièce de contact mobile une branche disposée de manière que, lorsque les contacts sont fermés, le courant passe en sens opposés dans cette branche et dans la pièce de contact mobile.
  • la branche déflectrice d'arc est disposée de manière qu'à l'ouverture des contacts le courant passe en sens opposés dans cette branche et dans la pièce de contact mobile,
  • la branche de la première partie conductrice et la branche déflectrice d'arc de la deuxième partie conductrice sont disposées sensiblement parallèles à la pièce de contact mobile,
  • la deuxième partie de la pièce de contact fixe est formée par une pièce pliée dont le pli est situé au voisinage de l'intervalle de saut d'arc et relie la branche déflectrice d'arc à une branche de raccordement avec l'organe à protéger,
  • une pièce ferromagnétique est disposée entre la branche déflectrice et la branche de raccordement.
According to the invention:
  • the first conductive part comprises, in the vicinity of the movable contact piece, a branch arranged so that, when the contacts are closed, the current flows in opposite directions in this branch and in the movable contact piece.
  • the arc deflecting branch is arranged so that when the contacts open, the current flows in opposite directions in this branch and in the movable contact part,
  • the branch of the first conductive part and the arc deflecting branch of the second conductive part are arranged substantially parallel to the movable contact piece,
  • the second part of the fixed contact part is formed by a folded part, the fold of which is located in the vicinity of the arc jump interval and connects the arc deflecting branch to a branch connecting with the member to be protected ,
  • a ferromagnetic part is disposed between the deflector branch and the connecting branch.

Ainsi, par l'agencement décrit de la branche déflectrice, qui se trouve ou non dans le prolongement de la branche portant le contact fixe, et par la présence de la pièce ferromagnétique entre les branches de la pièce pliée, on obtient un soufflage magnétique satisfaisant de l'arc même lorsque celui-ci a franchi l'intervalle d'isolement entre les deux parties de la pièce de contact fixe ; la branche déflectrice de la pièce de contact fixe peut être avantageusement raccordée à une borne auxiliaire du disjoncteur, de préférence accessible frontalement.Thus, by the arrangement described of the deflecting branch, which may or may not be in the extension of the branch carrying the fixed contact, and by the presence of the ferromagnetic part between the branches of the folded part, a satisfactory magnetic blowing is obtained. of the arc even when it has crossed the isolation gap between the two parts of the fixed contact part; the deflecting branch of the fixed contact part can advantageously be connected to an auxiliary terminal of the circuit breaker, preferably accessible from the front.

D'autres avantages et caractéristiques ressortiront de l'exposé qui va suivre d'un mode de réalisation de l'invention, illustré à titre d'exemple sur les figures.

  • La figure 1 représente schématiquement un disjoncteur mettant en oeuvre l'invention.
  • La figure 2 montre un mode de réalisation de l'invention.
  • La figure 3 est une vue selon III-III d'un détail de la figure 2.
  • La figure 4 montre une variante de réalisation.
  • La figure 5 est une vue selon V-V d'un détail de la figure 4.
  • La figure 6 montre l'association du disjoncteur avec un contacteur, vue de devant.
  • La figure 7 montre en vue de côté l'association d'une variante du disjoncteur avec un contacteur.
  • La figure 8 représente en vue de côté une variante de réalisation du disjoncteur.
Other advantages and characteristics will emerge from the description which follows of an embodiment of the invention, illustrated by way of example in the figures.
  • FIG. 1 schematically represents a circuit breaker implementing the invention.
  • Figure 2 shows an embodiment of the invention.
  • FIG. 3 is a view along III-III of a detail in FIG. 2.
  • Figure 4 shows an alternative embodiment.
  • FIG. 5 is a view along VV of a detail in FIG. 4.
  • Figure 6 shows the association of the circuit breaker with a contactor, front view.
  • Figure 7 shows in side view the association of a variant of the circuit breaker with a contactor.
  • Figure 8 shows a side view of an alternative embodiment of the circuit breaker.

On voit sur la figure 1 un disjoncteur électrique 10 qui comprend dans un boîtier 11 un organe de coupure électromécanique muni d'une pièce de contact mobile 20 et d'une pièce de contact fixe 30.FIG. 1 shows an electrical circuit breaker 10 which comprises, in a housing 11, an electromechanical breaking member provided with a movable contact piece 20 and with a fixed contact piece 30.

La pièce de contact mobile 20 porte le contact mobile proprement dit 21 et elle est reliée par des conducteurs appropriés à une borne amont 22 du disjoncteur et de là par des câbles externes à une source d'énergie électrique à basse tension 23. Le terme disjoncteur couvre ici tout appareil du genre disjoncteur, en particulier les disjoncteurs-contacteurs ou d'autres associations d'un disjoncteur avec un autre appareil électrique.The movable contact piece 20 carries the actual movable contact 21 and it is connected by appropriate conductors to an upstream terminal 22 of the circuit breaker and from there by external cables to a source of low voltage electrical energy 23. The term circuit breaker covers here any device of the circuit breaker type, in particular circuit breakers-contactors or other associations of a circuit breaker with another electrical device.

La pièce de contact fixe 30 comprend deux parties 31,32 électriquement isolées l'une de l'autre par un intervalle d'isolement 33. La partie principale 31 de la pièce 30 porte le contact fixe proprement dit 34 et appartient à un cheminement normal de courant C1 ; la partie auxiliaire 32 de la pièce 30 appartient à un cheminement auxiliaire de courant C2 ; les cheminements C1 puis C2 sont parcourus par le courant respectivement quand les contacts 21,34 sont fermés puis pendant leur phase transitoire d'ouverture ; dans ce dernier cas, l'arc engendré entre les contacts saute en effet de la partie 31 à la partie 32 en franchissant l'intervalle isolant 33 ; les phases successives du phénomène d'arc sont indiquées en A1, A2, A3.The fixed contact piece 30 comprises two parts 31, 32 electrically isolated from each other by an isolation gap 33. The main part 31 of the piece 30 carries the fixed contact itself 34 and belongs to a normal path. of current C1; the auxiliary part 32 of the part 30 belongs to an auxiliary current path C2; the paths C1 then C2 are traversed by the current respectively when the contacts 21, 34 are closed and then during their transient opening phase; in the latter case, the arc generated between the contacts jumps from part 31 to part 32, crossing the insulating gap 33; the successive phases of the arc phenomenon are indicated in A1, A2, A3.

On remarque que les parties respectives 31,32 de la pièce de contact fixe 30 sont toutes deux en forme approximative de J et comportent ainsi chacune, dans le but de chasser l'arc vers la chambre de coupure 45, une branche 35,36 voisine du contact mobile et sensiblement parallèle à la pièce 20. Les branches 35,36 sont parcourues par un courant i31, respectivement i32 dans le sens inverse du courant i20 dans la pièce voisine - bras ou pont - de contact mobile 20, et ce respectivement à l'état fermé et dans la phase transitoire d'ouverture.It is noted that the respective parts 31, 32 of the fixed contact part 30 are both in the approximate shape of J and thus each comprise, for the purpose of driving the arc towards the breaking chamber 45, a neighboring branch 35, 36 of the movable contact and substantially parallel to the part 20. The branches 35, 36 are traversed by a current i 31 , respectively i 32 in the opposite direction to the current i 20 in the neighboring part - arm or bridge - of movable contact 20, and this respectively in the closed state and in the transient opening phase.

Le chemin normal de courant C1 relie la partie principale 31 de la pièce de contact fixe 30 à une première borne aval 37 du disjoncteur et de là par un câble externe à une borne amont 38 d'un organe 40 à protéger - tel qu'un organe interrupteur statique, un contacteur ou une autre charge -. Le chemin auxiliaire de courant C2 relie la partie auxiliaire 32 de la pièce 30 à une deuxième borne aval 37' ou borne auxiliaire du disjoncteur ; la borne 37' est raccordée par un câble externe à une borne aval 39 de l'organe 40. La pièce de contact mobile 20 est reliée à la borne amont 22 du disjoncteur via un organe déclencheur magnétique ou magnétothermique 42 qui, par l'intermédiaire d'un mécanisme 43, commande l'ouverture des contacts dès qu'il détecte une surintensité. Un bouton de commande 44 permet également d'ouvrir et fermer les contacts.The normal current path C1 connects the main part 31 of the fixed contact part 30 to a first downstream terminal 37 of the circuit breaker and from there by an external cable to an upstream terminal 38 of a member 40 to be protected - such as a static switch, contactor or other load -. The auxiliary current path C2 connects the auxiliary part 32 of the part 30 to a second downstream terminal 37 'or auxiliary terminal of the circuit breaker; the terminal 37 'is connected by an external cable to a downstream terminal 39 of the member 40. The movable contact piece 20 is connected to the upstream terminal 22 of the circuit breaker via a magnetic or magnetothermal trip member 42 which, via a mechanism 43 controls the opening of the contacts as soon as it detects an overcurrent. A control button 44 also makes it possible to open and close the contacts.

Dans le mode de réalisation de la figure 2, le disjoncteur comprend pour pièce de contact mobile 20 un pont à double coupure déplaçable en translation selon la flèche B. La branche déflectrice 36 de la partie 32 est contiguë à une chambre de coupure 45 contenant des ailettes de fractionnement d'arc 46. La partie 31 comprend une branche 47 de liaison avec la borne 37, parallèle à la branche 35 qui porte le contact fixe et reliée à cette branche par une branche perpendiculaire 48. La partie 32 comprend une branche 49 de raccordement avec les autres éléments du chemin de dérivation C2. La branche 49 est parallèle à la branche déflectrice 36 et lui est reliée par un pli ou une branche perpendiculaire 50 obtenue par pliage. Un espace d'air est prévu ou une pièce isolante 51, par exemple une couche mince isolante, peut être insérée entre les branches 36,49, ainsi qu'une pièce ferromagnétique 52 visant à améliorer l'induction magnétique produite par le courant dans la branche 36. Entre les branches 47,49, on a un espace d'air ou une couche diélectrique 53.In the embodiment of FIG. 2, the circuit breaker comprises for movable contact piece 20 a double-cut bridge displaceable in translation according to arrow B. The deflector branch 36 of part 32 is contiguous with a cut-off chamber 45 containing arc splitting fins 46. The part 31 comprises a branch 47 for connection with the terminal 37, parallel to the branch 35 which carries the fixed contact and connected to this branch by a perpendicular branch 48. The part 32 comprises a branch 49 of connection with the other elements of the bypass path C2. The branch 49 is parallel to the deflecting branch 36 and is connected to it by a fold or a perpendicular branch 50 obtained by folding. An air space is provided or an insulating part 51, for example a thin insulating layer, can be inserted between the branches 36, 49, as well as a ferromagnetic part 52 aimed at improving the magnetic induction produced by the current in the branch 36. Between the branches 47,49, there is an air space or a dielectric layer 53.

Dans la variante de la figure 4, la branche 35 de la partie 31 qui porte le contact fixe pénètre dans une ouverture 54 de la branche déflectrice 36 de la partie 32. Une couche isolante 55 est interposée près du bord de l'ouverture entre les branches 35,36.In the variant of FIG. 4, the branch 35 of the part 31 which carries the fixed contact enters an opening 54 of the deflecting branch 36 of the part 32. An insulating layer 55 is interposed near the edge of the opening between the branches 35.36.

Le disjoncteur représenté fonctionne de la manière suivante. On suppose qu'initialement les contacts sont fermés, le courant passant par le chemin C1. Lorsqu'une surintensité est détectée par l'organe magnétothermique 42, celui-ci réagit et le mécanisme 43 commande l'ouverture des contacts. L'arc qui apparaît entre les contacts 21,34 (état A1) se déplace vers la droite (figure 1) et saute l'intervalle isolant 33 (état A2). Le courant d'ouverture emprunte alors le cheminement de dérivation C2 ; comme il s'écoule dans la branche déflectrice 36 en sens opposé à son cheminement dans la pièce de contact mobile 20 (état A3), il en résulte une induction magnétique qui tend à poursuivre le soufflage de l'arc vers la droite (figure 1) et donc vers les ailettes de fractionnement.The circuit breaker shown operates as follows. It is assumed that initially the contacts are closed, the current passing through the path C1. When an overcurrent is detected by the magnetothermal member 42, the latter reacts and the mechanism 43 controls the opening of the contacts. The arc which appears between the contacts 21,34 (state A1) moves to the right (figure 1) and skips the insulating interval 33 (state A2). The opening current then follows the bypass path C2; as it flows in the deflecting branch 36 in the opposite direction to its path in the movable contact piece 20 (state A3), this results in a magnetic induction which tends to continue blowing the arc to the right (FIG. 1 ) and therefore to the fractionation fins.

On voit sur la figure 6 un exemple d'association du disjoncteur 10 avec un contacteur 40. Le contacteur 40 comprend un interrupteur 56 de type à contacts séparables ou de type statique commandé par un organe 57 de type électromagnétique ou respectivement électronique. L'organe de commande 57 est relié à des bornes de commande A1,A2. Les bornes aval 37 et 37' du disjoncteur sont câblées respectivement aux bornes amont 38 et aval 39 du contacteur. Les bornes 22,37,37',38,39 d'un même pôle sont accessibles frontalement et avantageusement situées dans un plan P perpendiculaire aux faces frontales du disjoncteur et du contacteur, ce qui permet à l'utilisateur de faire bénéficier de la bonne qualité de coupure du disjoncteur un contacteur de calibre variable facile à connecter au disjoncteur.FIG. 6 shows an example of association of the circuit breaker 10 with a contactor 40. The contactor 40 comprises a switch 56 of the separable contact type or of the static type controlled by a member 57 of the electromagnetic or respectively electronic type. The control member 57 is connected to control terminals A1, A2. The downstream terminals 37 and 37 'of the circuit breaker are wired respectively to the upstream terminals 38 and downstream 39 of the contactor. The terminals 22, 37, 37 ′, 38, 39 of the same pole are accessible frontally and advantageously located in a plane P perpendicular to the front faces of the circuit breaker and of the contactor, which allows the user to benefit from the good breaker cut-out quality a variable gauge contactor easy to connect to the circuit breaker.

Dans le mode de réalisation de la figure 7, le disjoncteur est associé à un contacteur 40. Le disjoncteur comprend un pont de contact mobile 20 qui présente deux contacts 20a,20b pour coopérer avec des contacts fixes respectifs 34a,34b portés par des pièces de contact fixe 30a,30b.In the embodiment of FIG. 7, the circuit breaker is associated with a contactor 40. The circuit breaker comprises a movable contact bridge 20 which has two contacts 20a, 20b to cooperate with respective fixed contacts 34a, 34b carried by parts of fixed contact 30a, 30b.

Chacune de celles-ci comprend deux parties 31a;31b et 32a;32b en forme de J, contiguës et isolées mutuellement par un intervalle isolant 33a;33b, au voisinage d'ailettes de refroidissement et de fractionnement d'arc 46a,46b. Les bornes aval principale 37 et auxiliaire 37' sont respectivement reliées aux parties 31b,32b de la pièce fixe 30b et sont câblées, comme décrit précédemment, aux bornes 38,39 du contacteur.Each of these comprises two parts 31a; 31b and 32a; 32b in the form of J, contiguous and mutually isolated by an insulating gap 33a; 33b, in the vicinity of cooling and arc splitting fins 46a, 46b. The main downstream 37 and auxiliary 37 'downstream terminals are respectively connected to the parts 31b, 32b of the fixed part 30b and are wired, as described above, to the terminals 38, 39 of the contactor.

Les parties 31a,32a de la pièce fixe 30a sont raccordées à la borne amont principale 22 et respectivement à une borne amont auxiliaire 22'. Une impédance Z de limitation de courant est disposée entre les bornes amont 22,22'. Une ouverture des contacts consécutive à un court-circuit entraîne donc la mise en service transitoire, c'est-à-dire pendant la durée du phénomène d'arc, du circuit borne 22 - impédance Z - borne 22', et donc une limitation correspondante du courant d'arc.The parts 31a, 32a of the fixed part 30a are connected to the main upstream terminal 22 and respectively to an auxiliary upstream terminal 22 '. A current limiting impedance Z is disposed between the upstream terminals 22,22 '. An opening of the contacts following a short circuit therefore causes the transient commissioning, that is to say during the duration of the arcing phenomenon, of the circuit terminal 22 - impedance Z - terminal 22 ', and therefore a limitation arc current.

Au lieu d'être constitué par l'interconnexion électrique de deux appareils 10,40 mécaniquement indépendants, le dispositif peut être composé d'un disjoncteur 10 auquel le contacteur 40 est rapporté par embrochage selon la flèche F (figure 8). Dans ce cas, le contacteur 40 présente une broche amont 38 et une broche aval 39 connectables à des bornes aval respectives 57,58. La borne 58 est connectée d'une part à une borne 50 de liaison avec le circuit de charge, d'autre part à la partie 32 de la pièce de contact fixe 30 par le chemin C2. La borne 57 est reliée à la partie 31 par le chemin auxiliaire C1.Instead of being constituted by the electrical interconnection of two mechanically independent devices 10.40, the device can be composed of a circuit breaker 10 to which the contactor 40 is connected by plugging in according to arrow F (FIG. 8). In this case, the contactor 40 has an upstream pin 38 and a downstream pin 39 connectable to respective downstream terminals 57,58. The terminal 58 is connected on the one hand to a terminal 50 for connection with the charging circuit, on the other hand to the part 32 of the fixed contact part 30 by the path C2. Terminal 57 is connected to part 31 by the auxiliary path C1.

L'invention est applicable aux disjoncteurs à simple ou double coupure, associables à des contacteurs électromécaniques ou statiques.The invention is applicable to single or double break circuit breakers, which can be combined with electromechanical or static contactors.

Claims (6)

  1. Magnetic blow-out circuit breaker comprising:
    - at least one fixed and one movable contact separable from one another and located respectively on a fixed contact component and a moving contact component, the latter being subject to a control mechanism that is activated particularly in the presence of an overload.
    - fixed contact component (30) being connected to an electrical device (40) to be protected and comprising a second conducting section (32) that adjoins a first conducting section (31) connected to the fixed contact (34) while being electrically insulated from said first conducting section by an insulating gap (33) suitable for an arc jump and comprising an arc deflecting arm (36) contiguous with a breaking chamber,
    wherein:
    - the first conducting section (31) comprises an arm (35) disposed in the vicinity of the moving contact section (20) such that when the contacts are closed the current flows in opposite directions in said arm and in the moving contact component,
    - the arc deflecting arm (36) is disposed such that when the contacts open the current flows in opposite directions in said arm and in the moving contact component (20),
    - the arm (35) of the first conducting section and the arc deflecting arm (36) of the second conducting section are disposed more or less parallel to the moving contact component,
    - the second section (32) of the fixed contact component (30) is formed by a bent component in which the bend (50) is located in the vicinity of the arc jump (33) and connects the arc deflecting arm (36) to an arm (49) that links it to the component to be protected (40),
    - a ferromagnetic component (52) is disposed between the deflecting arm (36) and the connecting arm (49).
  2. Circuit breaker of claim 1 wherein an insulating layer (51) is disposed between the deflecting arm (36) and the connecting arm (49).
  3. Circuit breaker of claim 1 wherein one end of the first section (31) of the fixed contact component (30) is inserted into an aperture (54) in the deflecting arm (36) of the second section (32) of the fixed contact component and wherein an insulating layer (55) is inserted between the said end and the deflecting arm near the rim of the aperture.
  4. Circuit breaker of claim 1 wherein the arc deflecting arm (36) is in the shape of the letter J and is connected directly to an auxiliary downstream terminal (37') of the circuit breaker.
  5. Circuit breaker of any of claims 1 to 4 characterized by the fact that it has double cut-off poles.
  6. Circuit breaker of claim 5 characterized by the fact that its upstream section comprises a fixed contact component (30a) fitted with two conducting sections (31a, 32a) separated from one another by an insulating gap (33a) suitable for an arc jump and connected to one another by a current limitation impedor (Z) .
EP93402305A 1992-09-25 1993-09-21 Magnetic blow-out circuit breaker Expired - Lifetime EP0589779B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9211569 1992-09-25
FR9211569A FR2696273B1 (en) 1992-09-25 1992-09-25 Electric circuit breaker with magnetic blow.

Publications (2)

Publication Number Publication Date
EP0589779A1 EP0589779A1 (en) 1994-03-30
EP0589779B1 true EP0589779B1 (en) 1997-12-17

Family

ID=9433985

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Application Number Title Priority Date Filing Date
EP93402305A Expired - Lifetime EP0589779B1 (en) 1992-09-25 1993-09-21 Magnetic blow-out circuit breaker

Country Status (9)

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US (1) US5373273A (en)
EP (1) EP0589779B1 (en)
JP (1) JPH06236728A (en)
KR (1) KR940007918A (en)
CN (1) CN1032338C (en)
DE (1) DE69315786T2 (en)
ES (1) ES2110582T3 (en)
FR (1) FR2696273B1 (en)
TW (1) TW238396B (en)

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FR2742916B1 (en) * 1995-12-21 1998-01-16 Schneider Electric Sa ARC SWITCHED ELECTRICAL DEVICE
US5859578A (en) * 1997-03-04 1999-01-12 General Electric Company Current limiting shunt for current limiting circuit breakers
KR100300101B1 (en) * 1997-12-31 2001-10-27 김진찬 Satellite communication system having defective channel modem announcing function
US6128168A (en) 1998-01-14 2000-10-03 General Electric Company Circuit breaker with improved arc interruption function
US6144540A (en) * 1999-03-09 2000-11-07 General Electric Company Current suppressing circuit breaker unit for inductive motor protection
US6157286A (en) * 1999-04-05 2000-12-05 General Electric Company High voltage current limiting device
US6392512B1 (en) * 1999-11-05 2002-05-21 Siemens Energy & Automation, Inc. Stationary line bus assembly
US7716816B2 (en) * 2006-09-22 2010-05-18 Rockwell Automation Technologies, Inc. Method of manufacturing a switch assembly
US7551050B2 (en) * 2006-09-22 2009-06-23 Rockwell Automation Technologies, Inc. Contactor assembly with arc steering system
WO2013000483A1 (en) * 2011-06-30 2013-01-03 Vestas Wind Systems A/S A circuit breaker and method for interrupting large direct currents
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Also Published As

Publication number Publication date
FR2696273B1 (en) 1994-11-18
FR2696273A1 (en) 1994-04-01
EP0589779A1 (en) 1994-03-30
CN1032338C (en) 1996-07-17
TW238396B (en) 1995-01-11
KR940007918A (en) 1994-04-28
ES2110582T3 (en) 1998-02-16
US5373273A (en) 1994-12-13
JPH06236728A (en) 1994-08-23
CN1084670A (en) 1994-03-30
DE69315786D1 (en) 1998-01-29
DE69315786T2 (en) 1998-04-09

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