EP0649156B1 - Protective apparatus formed by connecting in series a circuit breaker with a switching device - Google Patents

Protective apparatus formed by connecting in series a circuit breaker with a switching device Download PDF

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Publication number
EP0649156B1
EP0649156B1 EP94410087A EP94410087A EP0649156B1 EP 0649156 B1 EP0649156 B1 EP 0649156B1 EP 94410087 A EP94410087 A EP 94410087A EP 94410087 A EP94410087 A EP 94410087A EP 0649156 B1 EP0649156 B1 EP 0649156B1
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EP
European Patent Office
Prior art keywords
electrode
switch circuit
circuit
circuit breaker
effector
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
EP94410087A
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German (de)
French (fr)
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EP0649156A1 (en
Inventor
Alain Schneider Electric Sa Menier
Eric Schneider Electric Sa Domejean
Alain Schneider Electric Sa Frolla
Jean-Jacques Schneider Electric Sa Nardin
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Schneider Electric Industries SAS
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Schneider Electric SE
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Publication of EP0649156A1 publication Critical patent/EP0649156A1/en
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Publication of EP0649156B1 publication Critical patent/EP0649156B1/en
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Classifications

    • 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
    • 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

Definitions

  • the effector is formed by a static switch connected in series with the contacts of the circuit breaker.
  • the switch is connected between the contact fixed and the input terminal, while the movable contact is connected to the output terminal by through the thermal release, and the electromagnetic release.
  • the switch is automatically bypassed when switching from arc to arc horn lower, which is permanently at the potential of the input terminal. To get fast arc switching, it is necessary to bring the conductor as close as possible link extending the arc horn to form the shunting circuit.
  • the switch is connected between the triggers and the output terminal, and the two arc guide horns are respectively connected to the input terminal and to the output terminal.
  • the switch shunt is established with delay, since it is it is necessary to wait for the opening limit switch of the circuit breaker moving contact to obtain the switching of the arc on the guide horn located at the potential of the terminal exit.
  • the object of the invention is to improve the protection and the dielectric strength of a circuit breaker and effector equipment.
  • the isolation interval is composed of a first air space between the lower part of the fixed contact and the half-loop electrode, and an intermediate wall of rigid insulating material serving as a contact support fixed, said wall extending opposite the movable contact between the fixed contact and a branch conductor for extending the electrode towards the end of the coil.
  • an electrical protection device 10 is formed by the association of a circuit breaker 12 with a remotely controlled effector 14.
  • the circuit breaker 12 has a first switch circuit 16 electrically connected in series with a second circuit switch 18 of the effector 14.
  • the first switch circuit 16 of the circuit breaker comprises a fixed contact 20 cooperating with a movable contact 22, which is connected by a braid 24 to a bimetallic strip of a trip device thermal 26.
  • the foot of the bimetallic strip is connected to an input terminal 28, and to a first horn 30 arc guide.
  • the output terminal 32 is connected to one of the ends 34b of a coil 34 of an electromagnetic trip device 36, the other end 34a being at the potential of a switching electrode 38, and a second arc guiding horn 40.
  • Fixed contact 20 is electrically isolated from the coil 34 and from the electrode 38 by an insulation gap 42.
  • the electromagnetic trip device 36 is provided with a trip device 44 arranged to ensure the triggering of the mechanism 43 when a short-circuit current appears, and to play the role of a striker propelling the movable contact 22 towards the open position.
  • the two horns 30, 40 frame an arc extinguishing chamber 45 which is formed by a stacking of deionization sheets.
  • the second switch circuit 18 of the effector 14 is connected to a pair of terminals. connection 46, 48 so as to be electrically connected to the fixed contact 20 by a first connection area 50, and at the end 34b of the coil 34 by a second area 52 link.
  • the actuation of the contacts of the second switch circuit 18 is operated by a control member 54 for example of the electromagnet type connected to terminals 56, 58 control auxiliaries.
  • the two areas 50, 52 are respectively connected to the terminals of connection 46, 48 of the effector 14 by a pair of conductors 60, 62.
  • the effector 14 can be constituted either by a remote control switch or by a contactor electromechanical or static, or by any other electrical endurance device, with the setting in series of its second switch circuit 18 in the main circuit of circuit breaker 12.
  • the current enters the apparatus 10 via input terminal 28, flows successively through the bimetallic strip of the thermal release 26, the contacts 22, 20 of the first switch circuit 16, the first connection area 50, the conductor 60, the contacts of the second switch circuit 18, the conductor 62, the second connection area 52, and then crosses the coil 34 of the electromagnetic trip device 36 to exit the apparatus 10 through the output terminal 32.
  • each control pulse applied to terminals 56, 58 causes a change of state of the second switch circuit 18. If the effector 14 is constituted by a contactor, the second switch circuit 18 is permanently in the closed state in presence of a maintained control signal. The contactor opens automatically that the control signal disappears.
  • the appearance of a short-circuit or overcurrent current downstream of the output terminal 32 causes the automatic triggering of mechanism 43 by the action of the trigger electromagnetic 36 or thermal trip unit 26 electrically connected in series with an effector (14).
  • the switching of the arc on an electrode (38) when the mechanism following a fault causes shunting of the effector (14).
  • the electrode (38) is separated from the fixed contact (20) by an isolation gap (42), which is dimensioned for favor said switching of the arc on the electrode (38) at the start of the opening stroke of the movable contact (22), and to guarantee the dielectric strength in the closed state of the contacts (20, 22, the triggering member 44 of the electromagnetic trigger 36 then maintains the movable contact 22 in the open state until the arc goes out.
  • Figure 3 shows the circuit breaker 12 in the closed position.
  • the same numbers of benchmarks will be used to designate parts similar to those in Figure 2.
  • the contact mobile 22 is carried by a contact arm 64 pivotally mounted on an axis 66.
  • the ranges 50, 52 of the effector 14 are connected respectively to the fixed contact 20, and to the end 34a of the coil 34 which is at the potential of the switching electrode 38.
  • the presence of the isolation interval 42 guarantees the holding of the isolation between the inlet and the outlet of the effector 14 when the contacts 20, 22 of the first switch circuit 16 are in the closed position, while the second switch circuit 18 is in the open state.
  • the isolation interval 42 is composed of a first air space 70 arranged between the lower part of the fixed contact 20 and the electrode 38 shaped as a half-loop, and an intermediate wall 72 of material rigid insulation serving as a support for the fixed contact 20.
  • the wall 72 is produced by molding with the plastic housing 74 of the circuit breaker 12, and extends opposite the movable contact 22 between the fixed contact 20 and a conductive branch 76 connecting the electrode 38 to the end 34a of the coil 34.
  • the shape of the electrode 38 is adapted to favor the migration of the arc root during the fault breaking phase, while guaranteeing the dielectric withstand when the circuit breaker is closed.
  • the electrode 38 is equipped with a rectilinear face 78 arranged in the extension of the plane of the pad of the fixed contact 20.
  • the face 78 can also be curved to project from the plane of the fixed contact 20.
  • the variant of FIG. 7 relates to a bipolar apparatus 100 formed by the association of a unipolar and neutral circuit breaker 102 and a bipolar effector 104.
  • the phase circuit L with its triggers 126 and 136 is identical to the diagram in FIG. 2, the marks of the same parts being assigned a number 1 at the hundred.
  • the operation of the phase circuit L of the apparatus 100 has the same advantages as that described above.
  • the neutral circuit N the marks of similar parts are assigned a number 2 at the hundred.
  • the circuit breaker part of the neutral circuit N is not protected, and is therefore devoid of trip devices.
  • the input terminal 228 is connected by the braid 224 to the movable contact 222, and the guide horn assembly 240 and the electrode 238 is connected directly to the output terminal 232.
  • connection pad 250 is connected to the fixed contact 220, while the other connection pad 252 is connected to the guide horn 240.
  • the effector 214 is connected in series between the fixed contact 220 and the switching electrode 238. The two parts 114, 214 of the bipolar effector 104 are thus de-energized when the contacts 120, 220; 122, 222 of the circuit breaker 102 are open.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Description

L'invention est relative à un appareillage de protection électrique, formé par l'association d'un disjoncteur, et d'un effecteur,

  • le disjoncteur, comprenant un premier circuit interrupteur à contacts fixe et mobile, un mécanisme piloté par un déclencheur électromagnétique à bobine de commande et par un déclencheur thermique, une paire de première et deuxième cornes de guidage d'arc associée à une électrode de commutation, disposée au voisinage des contacts du premier circuit interrupteur, une chambre d'extinction d'arc dans le circuit des déclencheurs, une borne d'entrée, et une borne de sortie,
  • l'effecteur ayant un deuxième circuit interrupteur agencé pour être connecté électriquement en série avec ledit premier circuit interrupteur, lorsque ce dernier se trouve dans l'état fermé, et pour être automatiquement shunté par la commutation de l'arc sur l'électrode lors du déclenchement du mécanisme à la suite d'un défaut.
The invention relates to electrical protection equipment, formed by the association of a circuit breaker, and an effector,
  • the circuit breaker, comprising a first switch circuit with fixed and movable contacts, a mechanism controlled by an electromagnetic trip device with a control coil and by a thermal trip device, a pair of first and second arc guide horns associated with a switching electrode, disposed in the vicinity of the contacts of the first switch circuit, an arc extinguishing chamber in the trip circuit, an input terminal, and an output terminal,
  • the effector having a second switch circuit arranged to be electrically connected in series with said first switch circuit, when the latter is in the closed state, and to be automatically shunted by the switching of the arc on the electrode during triggering of the mechanism following a fault.

Dans un appareil connu du genre mentionné, décrit dans le document EP-A 104 981, l'effecteur est formé par un commutateur statique connecté en série avec les contacts du disjoncteur. Dans un premier mode de réalisation, le commutateur est connecté entre le contact fixe et la borne d'entrée, alors que le contact mobile est branché à la borne de sortie par l'intermédiaire du déclencheur thermique, et du déclencheur électromagnétique. Le commutateur est automatiquement shunté lors de la commutation de l'arc sur la corne d'arc inférieure, laquelle se trouve en permanence au potentiel de la borne d'entrée. Pour obtenir une commutation rapide de l'arc, il est nécessaire de rapprocher le plus possible le conducteur de liaison prolongeant la corne d'arc pour constituer le circuit de shuntage. L'effet de proximité de ce conducteur favorise la commutation de l'arc entraínant une protection rapide de l'effecteur, mais pose des problèmes de tenue diélectrique lorsque les contacts du disjoncteur sont fermés et que le commutateur se trouve dans l'état ouvert. Dans un deuxième mode de réalisation, le commutateur est branché entre les déclencheurs et la borne de sortie, et les deux cornes de guidage d'arc sont connectées respectivement à la borne d'entrée et à la borne de sortie. En cas de défaut, le shuntage du commutateur s'établit avec retard, car il est nécessaire d'attendre la fin de course d'ouverture du contact mobile du disjoncteur pour obtenir la commutation de l'arc sur la corne de guidage se trouvant au potentiel de la borne de sortie.In a known device of the kind mentioned, described in document EP-A 104 981, the effector is formed by a static switch connected in series with the contacts of the circuit breaker. In a first embodiment, the switch is connected between the contact fixed and the input terminal, while the movable contact is connected to the output terminal by through the thermal release, and the electromagnetic release. The switch is automatically bypassed when switching from arc to arc horn lower, which is permanently at the potential of the input terminal. To get fast arc switching, it is necessary to bring the conductor as close as possible link extending the arc horn to form the shunting circuit. The effect of proximity of this conductor promotes arc switching resulting in rapid protection of the effector, but poses problems of dielectric strength when the contacts of the circuit breaker are closed and the switch is in the open state. In a second embodiment, the switch is connected between the triggers and the output terminal, and the two arc guide horns are respectively connected to the input terminal and to the output terminal. In the event of a fault, the switch shunt is established with delay, since it is it is necessary to wait for the opening limit switch of the circuit breaker moving contact to obtain the switching of the arc on the guide horn located at the potential of the terminal exit.

L'objet de l'invention consiste à améliorer la protection et la tenue diélectrique d'un appareillage à disjoncteur et effecteur.The object of the invention is to improve the protection and the dielectric strength of a circuit breaker and effector equipment.

L'appareillage selon l'invention est caractérisé en ce que l'électrode de commutation est séparée du contact fixe par un intervalle d'isolement, et est reliée à l'une des extrémités de la bobine de commande du déclencheur électromagnétique,

  • le deuxième circuit interrupteur de l'effecteur est raccordé au contact fixe du premier circuit interrupteur, et à ladite extrémité de la bobine,
  • l'intervalle d'isolement est conformé pour favoriser la migration rapide de la racine d'arc sur l'électrode lors de l'ouverture sur défaut du disjoncteur et pour garantir la tenue diélectrique dans l'état fermé du disjoncteur, et dans l'état ouvert de l'effecteur.
The apparatus according to the invention is characterized in that the switching electrode is separated from the fixed contact by an isolation interval, and is connected to one of the ends of the control coil of the electromagnetic trip device,
  • the second switch circuit of the effector is connected to the fixed contact of the first switch circuit, and to said end of the coil,
  • the isolation interval is shaped to favor rapid migration of the arc root on the electrode when the circuit breaker opens on fault and to guarantee the dielectric strength in the closed state of the circuit breaker, and in the open state of the effector.

Un tel agencement permet de concilier le problème de protection rapide de l'effecteur contre les effets d'un courant de court-circuit, avec celui de la tenue diélectrique de l'appareillage.Such an arrangement makes it possible to reconcile the problem of rapid protection of the effector against the effects of a short-circuit current, with that of the dielectric strength of the switchgear.

Selon une caractéristique de l'invention, l'intervalle d'isolement est composé d'un premier espace d'air situé entre la partie inférieure du contact fixe et l'électrode en forme de demi-boucle, et d'une paroi intermédiaire en matériau isolant rigide servant de support au contact fixe, ladite paroi s'étendant à l'opposé du contact mobile entre le contact fixe et une branche conductrice de prolongement de l'électrode vers l'extrémité de la bobine.According to a characteristic of the invention, the isolation interval is composed of a first air space between the lower part of the fixed contact and the half-loop electrode, and an intermediate wall of rigid insulating material serving as a contact support fixed, said wall extending opposite the movable contact between the fixed contact and a branch conductor for extending the electrode towards the end of the coil.

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

  • la figure 1 est une vue schématique d'un appareillage électrique unipolaire selon l'invention,
  • la figure 2 montre le circuit électrique de l'appareillage selon la figure 1,
  • la figure 3 représente une vue en élévation du disjoncteur après enlèvement du couvercle, le disjoncteur étant dans l'état fermé,
  • les figures 4 et 5 sont des vues identiques de la figure 3, respectivement au début et à la fin de la course d'ouverture du contact mobile du disjoncteur,
  • la figure 6 montre une vue de détail de l'intervalle d'isolement,
  • la figure 7 est une vue identique de la figure 2, représentant une variante de réalisation formée par l'association d'un disjoncteur unipolaire et neutre et d'un effecteur bipolaire.
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 view of a single-pole electrical apparatus according to the invention,
  • FIG. 2 shows the electrical circuit of the apparatus according to FIG. 1,
  • FIG. 3 represents an elevation view of the circuit breaker after removing the cover, the circuit breaker being in the closed state,
  • FIGS. 4 and 5 are identical views of FIG. 3, respectively at the start and at the end of the opening stroke of the mobile contact of the circuit breaker,
  • FIG. 6 shows a detailed view of the isolation interval,
  • Figure 7 is an identical view to Figure 2, showing an alternative embodiment formed by the association of a unipolar and neutral circuit breaker and a bipolar effector.

Sur les figures 1 et 2, un appareillage de protection 10 électrique est formé par l'association d'un disjoncteur 12 avec un effecteur 14 télécommandé. Le disjoncteur 12 comporte un premier circuit interrupteur 16 connecté électriquement en série avec un deuxième circuit interrupteur 18 de l'effecteur 14.In FIGS. 1 and 2, an electrical protection device 10 is formed by the association of a circuit breaker 12 with a remotely controlled effector 14. The circuit breaker 12 has a first switch circuit 16 electrically connected in series with a second circuit switch 18 of the effector 14.

Le premier circuit interrupteur 16 du disjoncteur comprend un contact fixe 20 coopérant avec un contact mobile 22, lequel est relié par une tresse 24 à un bilame d'un déclencheur thermique 26. Le pied du bilame est branché à une borne d'entrée 28, et à une première corne 30 de guidage d'arc. La borne de sortie 32 est reliée à l'une des extrémités 34b d'une bobine 34 d'un déclencheur électromagnétique 36, l'autre extrémité 34a étant au potentiel d'une électrode 38 de commutation, et d'une deuxième corne 40 de guidage d'arc. Le contact fixe 20 est électriquement isolé de la bobine 34 et de l'électrode 38 par un intervalle d'isolement 42. Le déclencheur électromagnétique 36 est doté d'un organe de déclenchement 44 agencé pour assurer le déclenchement du mécanisme 43 lors de l'apparition d'un courant de court-circuit, et pour jouer le rôle d'un percuteur propulsant le contact mobile 22 vers la position d'ouverture. Les deux cornes 30, 40 encadrent une chambre d'extinction d'arc 45 laquelle est formée par un empilage de tôles de désionisation.The first switch circuit 16 of the circuit breaker comprises a fixed contact 20 cooperating with a movable contact 22, which is connected by a braid 24 to a bimetallic strip of a trip device thermal 26. The foot of the bimetallic strip is connected to an input terminal 28, and to a first horn 30 arc guide. The output terminal 32 is connected to one of the ends 34b of a coil 34 of an electromagnetic trip device 36, the other end 34a being at the potential of a switching electrode 38, and a second arc guiding horn 40. Fixed contact 20 is electrically isolated from the coil 34 and from the electrode 38 by an insulation gap 42. The electromagnetic trip device 36 is provided with a trip device 44 arranged to ensure the triggering of the mechanism 43 when a short-circuit current appears, and to play the role of a striker propelling the movable contact 22 towards the open position. The two horns 30, 40 frame an arc extinguishing chamber 45 which is formed by a stacking of deionization sheets.

Le deuxième circuit interrupteur 18 de l'effecteur 14 est raccordé à une paire de bornes de raccordement 46, 48 de manière à être connecté électriquement au contact fixe 20 par une première plage 50 de liaison, et à l'extrémité 34b de la bobine 34 par une deuxième plage 52 de liaison. L'actionnement des contacts du deuxième circuit interrupteur 18 est opéré par un organe de commande 54 par exemple du type à électro-aimant relié à des bornes 56, 58 auxiliaires de commande. Les deux plages 50, 52 sont raccordées respectivement aux bornes de raccordement 46, 48 de l'effecteur 14 par une paire de conducteurs 60, 62.The second switch circuit 18 of the effector 14 is connected to a pair of terminals. connection 46, 48 so as to be electrically connected to the fixed contact 20 by a first connection area 50, and at the end 34b of the coil 34 by a second area 52 link. The actuation of the contacts of the second switch circuit 18 is operated by a control member 54 for example of the electromagnet type connected to terminals 56, 58 control auxiliaries. The two areas 50, 52 are respectively connected to the terminals of connection 46, 48 of the effector 14 by a pair of conductors 60, 62.

L'effecteur 14 peut être constitué soit par un télérupteur, soit par un contacteur électromécanique ou statique , soit par tout autre organe électrique d'endurance, avec la mise en série de son deuxième circuit interrupteur 18 dans le circuit principal du disjoncteur 12.The effector 14 can be constituted either by a remote control switch or by a contactor electromechanical or static, or by any other electrical endurance device, with the setting in series of its second switch circuit 18 in the main circuit of circuit breaker 12.

Dans l'état fermé du disjoncteur 12 et de l'effecteur 14, le courant rentre dans l'appareillage 10 par la borne d'entrée 28, circule successivement dans le bilame du déclencheur thermique 26, les contacts 22, 20 du premier circuit interrupteur 16, la première plage 50 de liaison, le conducteur 60, les contacts du deuxième circuit interrupteur 18, le conducteur 62, la deuxième plage 52 de liaison, et traverse ensuite la bobine 34 du déclencheur électromagnétique 36 pour sortir de l'appareillage 10 par la borne de sortie 32.In the closed state of the circuit breaker 12 and the effector 14, the current enters the apparatus 10 via input terminal 28, flows successively through the bimetallic strip of the thermal release 26, the contacts 22, 20 of the first switch circuit 16, the first connection area 50, the conductor 60, the contacts of the second switch circuit 18, the conductor 62, the second connection area 52, and then crosses the coil 34 of the electromagnetic trip device 36 to exit the apparatus 10 through the output terminal 32.

Le fonctionnement d'un récepteur (non représenté) raccordé à la borne de sortie 32 s'opère normalement par l'actionnement de l'organe de commande 54 de l'effecteur 14 à la suite de l'émission d'un signal de commande vers les bornes auxiliaires 56, 58. Dans le cas d'un télérupteur, chaque impulsion de commande appliquée aux bornes 56, 58 provoque un changement d'état du deuxième circuit interrupteur 18. Si l'effecteur 14 est constitué par un contacteur, le deuxième circuit interrupteur 18 se trouve en permanence dans l'état fermé en présence d'un signal de commande maintenu. L'ouverture du contacteur est automatique dès que le signal de commande disparaít.The operation of a receiver (not shown) connected to the output terminal 32 takes place normally by the actuation of the control member 54 of the effector 14 following the emission of a control signal to the auxiliary terminals 56, 58. In the case of a remote control switch, each control pulse applied to terminals 56, 58 causes a change of state of the second switch circuit 18. If the effector 14 is constituted by a contactor, the second switch circuit 18 is permanently in the closed state in presence of a maintained control signal. The contactor opens automatically that the control signal disappears.

Dans l'état ouvert du premier circuit interrupteur 16 à la suite d'une action manuelle ou automatique du mécanisme 43 du disjoncteur 12, tout ce qui est en aval du contact fixe 20 se trouve hors tension, notamment la bobine 34 du déclencheur électromagnétique 36, et le circuit complet de l'effecteur 14. La présence de l'intervalle d'isolement 42 permet alors d'effectuer en toute sécurité des opérations d'installation et de démontage de l'effecteur 14 dès que le disjoncteur 12 est ouvert.In the open state of the first switch circuit 16 following a manual action or automatic mechanism 43 of circuit breaker 12, everything that is downstream of fixed contact 20 is found de-energized, in particular the coil 34 of the electromagnetic trip device 36, and the circuit complete of the effector 14. The presence of the isolation interval 42 then makes it possible to carry out safely installation and disassembly of the effector 14 as soon as the circuit breaker 12 is open.

L'apparition d'un courant de court-circuit ou de surintensité en aval de la borne de sortie 32 provoque le déclenchement automatique du mécanisme 43 par l'action du déclencheur électromagnétique 36 ou du déclencheur thermique 26 connecté électriquement en série avec un effecteur (14). La commutation de l'arc sur une électrode (38) lors du déclenchement du mécanisme à la suite d'un défaut provoque le shuntage de l'effecteur (14). L'électrode (38) est séparée du contact fixe (20) par un intervalle d'isolement (42), lequel est dimensionné pour favoriser ladite commutation de l'arc sur l'électrode (38) au début de la course d'ouverture du contact mobile (22), et pour garantir la tenue diélectrique dans l'état fermé des contacts (20, 22, l'organe de déclenchement 44 du déclencheur électromagnétique 36 maintient alors le contact mobile 22 dans l'état ouvert jusqu'à l'extinction de l'arc.The appearance of a short-circuit or overcurrent current downstream of the output terminal 32 causes the automatic triggering of mechanism 43 by the action of the trigger electromagnetic 36 or thermal trip unit 26 electrically connected in series with an effector (14). The switching of the arc on an electrode (38) when the mechanism following a fault causes shunting of the effector (14). The electrode (38) is separated from the fixed contact (20) by an isolation gap (42), which is dimensioned for favor said switching of the arc on the electrode (38) at the start of the opening stroke of the movable contact (22), and to guarantee the dielectric strength in the closed state of the contacts (20, 22, the triggering member 44 of the electromagnetic trigger 36 then maintains the movable contact 22 in the open state until the arc goes out.

La figure 3 montre le disjoncteur 12 dans la position de fermeture. Les mêmes numéros de repères seront utilisés pour désigner des pièces simulaires à celles de la figure 2. Le contact mobile 22 est porté par un bras de contact 64 monté à pivotement sur un axe 66. Les plages 50, 52 de l'effecteur 14 sont raccordées respectivement au contact fixe 20, et à l'extrémité 34a de la bobine 34 qui se trouve au potentiel de l'électrode de commutation 38. La présence de l'intervalle d'isolement 42 garantit la tenue de l'isolement entre l'entrée et la sortie de l'effecteur 14 lorsque les contacts 20, 22 du premier circuit interrupteur 16 se trouvent dans la position de fermeture, alors que le deuxième circuit interrupteur 18 est dans l'état ouvert. Figure 3 shows the circuit breaker 12 in the closed position. The same numbers of benchmarks will be used to designate parts similar to those in Figure 2. The contact mobile 22 is carried by a contact arm 64 pivotally mounted on an axis 66. The ranges 50, 52 of the effector 14 are connected respectively to the fixed contact 20, and to the end 34a of the coil 34 which is at the potential of the switching electrode 38. The presence of the isolation interval 42 guarantees the holding of the isolation between the inlet and the outlet of the effector 14 when the contacts 20, 22 of the first switch circuit 16 are in the closed position, while the second switch circuit 18 is in the open state.

La migration de l'arc sur l'électrode de commutation 38 est représentée en détail sur les figures 4 et 5. Au début de la course d'ouverture du contact mobile 22 du disjoncteur 12 (figure 4), l'arc s'établit le long du trajet AB entre le contact fixe 20 et le contact mobile 22. L'effecteur 14 reste toujours inséré électriquement en série dans le circuit principal du disjoncteur 12.The migration of the arc on the switching electrode 38 is shown in detail on the Figures 4 and 5. At the start of the opening stroke of the movable contact 22 of the circuit breaker 12 (Figure 4), the arc is established along the path AB between the fixed contact 20 and the movable contact 22. The effector 14 always remains electrically inserted in series in the main circuit of the circuit breaker 12.

Le shuntage de l'effecteur 14 intervient dès que la racine d'arc A migre vers l'électrode de commutation 38. Le cheminement A1, B de l'arc entre le contact mobile 22 et l'électrode 38 arrête automatiquement la circulation du courant dans l'effecteur 14. La figure 5 montre le développement de l'arc A1 Bl dans la chambre de formation 68, juste avant son entrée dans la chambre d'extinction 45. On remarque que la bobine 34 du déclencheur électromagnétique reste alimentée par le courant de défaut aussi longtemps que l'arc se déplace le long de l'électrode de commutation 38.The shunting of the effector 14 occurs as soon as the arc root A migrates towards the electrode of switching 38. The path A1, B of the arc between the movable contact 22 and the electrode 38 automatically stops the flow of current in the effector 14. Figure 5 shows the development of arc A1 Bl in formation chamber 68, just before entering the extinguishing chamber 45. Note that the coil 34 of the electromagnetic trip device remains supplied by the fault current as long as the arc travels along the switching electrode 38.

Sur la figure 6 représentant en détail la zone de commutation de l'arc, l'intervalle d'isolement 42 est composé d'un premier espace d'air 70 agencé entre la partie inférieure du contact fixe 20 et l'électrode 38 conformée en demi-boucle, et d'une paroi 72 intermédiaire en matériau isolant rigide servant de support au contact fixe 20. La paroi 72 est réalisée par moulage avec le boítier 74 plastique du disjoncteur 12, et s'étend à l'opposé du contact mobile 22 entre le contact fixe 20 et une branche 76 conductrice reliant l'électrode 38 à l'extrémité 34a de la bobine 34.In Figure 6 showing in detail the arc switching area, the isolation interval 42 is composed of a first air space 70 arranged between the lower part of the fixed contact 20 and the electrode 38 shaped as a half-loop, and an intermediate wall 72 of material rigid insulation serving as a support for the fixed contact 20. The wall 72 is produced by molding with the plastic housing 74 of the circuit breaker 12, and extends opposite the movable contact 22 between the fixed contact 20 and a conductive branch 76 connecting the electrode 38 to the end 34a of the coil 34.

La forme de l'électrode 38 est adaptée pour favoriser la migration de la racine d'arc pendant la phase de coupure sur défaut, tout en garantissant la tenue diélectrique lorsque le disjoncteur est fermé. Selon la figure 6, l'électrode 38 est équipée d'une face 78 rectiligne disposée dans le prolongement du plan de la pastille du contact fixe 20. La face 78 peut également être bombée pour faire saillie du plan du contact fixe 20.The shape of the electrode 38 is adapted to favor the migration of the arc root during the fault breaking phase, while guaranteeing the dielectric withstand when the circuit breaker is closed. According to FIG. 6, the electrode 38 is equipped with a rectilinear face 78 arranged in the extension of the plane of the pad of the fixed contact 20. The face 78 can also be curved to project from the plane of the fixed contact 20.

La variante de la figure 7 concerne un appareillage bipolaire 100 formé par l'association d'un disjoncteur unipolaire et neutre 102 et d'un effecteur bipolaire 104. Le circuit de phase L avec ses déclencheurs 126 et 136 est identique au schéma de la figure 2, les repères des mêmes pièces étant affectés d'un chiffre 1 au niveau de la centaine. Le fonctionnement du circuit de phase L de l'appareillage 100 présente les mêmes avantages que celui décrit précédemment. Dans le circuit de neutre N, les repères des pièces similaires sont sont affectés d'un chiffre 2 au niveau de la centaine. La partie disjoncteur du circuit de neutre N n'est pas protégée, et est donc dépourvue de déclencheurs. La borne d'entrée 228 est reliée par la tresse 224 au contact mobile 222, et l'ensemble corne de guidage 240 et l'électrode 238 est raccordé directement à la borne de sortie 232. La plage de liaison 250 est reliée au contact fixe 220, tandis que l'autre plage de liaison 252 est branchée à la corne de guidage 240. Dans le circuit de neutre N, la mise en série de l'effecteur 214 s'effectue entre le contact fixe 220 et l'électrode de commutation 238. Les deux parties 114, 214 de l'effecteur bipolaire 104 se trouvent ainsi hors tension lorsque les contacts 120, 220; 122, 222 du disjoncteur 102 sont ouverts.The variant of FIG. 7 relates to a bipolar apparatus 100 formed by the association of a unipolar and neutral circuit breaker 102 and a bipolar effector 104. The phase circuit L with its triggers 126 and 136 is identical to the diagram in FIG. 2, the marks of the same parts being assigned a number 1 at the hundred. The operation of the phase circuit L of the apparatus 100 has the same advantages as that described above. In the neutral circuit N, the marks of similar parts are assigned a number 2 at the hundred. The circuit breaker part of the neutral circuit N is not protected, and is therefore devoid of trip devices. The input terminal 228 is connected by the braid 224 to the movable contact 222, and the guide horn assembly 240 and the electrode 238 is connected directly to the output terminal 232. The connection pad 250 is connected to the fixed contact 220, while the other connection pad 252 is connected to the guide horn 240. In the neutral circuit N, the effector 214 is connected in series between the fixed contact 220 and the switching electrode 238. The two parts 114, 214 of the bipolar effector 104 are thus de-energized when the contacts 120, 220; 122, 222 of the circuit breaker 102 are open.

Il est clair que l'invention s'étend à des disjoncteurs bipolaires, tripolaires et tétrapolaires, respectivement associés à des effecteurs bipolaires, tripolaires et tétrapolaires.It is clear that the invention extends to two-pole, three-pole and four-pole circuit breakers, respectively associated with bipolar, tripolar and tetrapolar effectors.

Claims (6)

  1. An electrical protection apparatus (10, 100) formed by association of a circuit breaker (12, 102) and an effector (14, 104),
    the circuit breaker (12, 102) comprising a first switch circuit (16) with stationary and movable contacts (20, 22; 120, 122; 220, 222), a mechanism (43) controlled by an electromagnetic trip device (36, 136) with an operating coil (34, 134) and by a thermal trip device (26, 126), a pair of first and second arc guiding horns (30, 40; 130, 140) associated with a switching electrode (38, 138, 238), arranged near the contacts of the first switch circuit (16), an arc extinguishing chamber (45, 145) in the trip devices circuit, an input terminal (28, 128, 228), and an output terminal (32, 132, 232),
    the effector (14, 104) having a second switch circuit (18, 118, 218) arranged to be electrically connected in series with said first switch circuit when the latter is in the closed state, and to be automatically shunted by switching of the arc onto the electrode (38, 138, 238) when the mechanism (43) tips following a fault,
    characterized in that :
    the switching electrode (38, 138) is separated from the stationary contact (20, 120) by an insulating gap (42), and is connected to one of the ends (34a) of the control coil (34, 134) of the electromagnetic trip device (36, 136),
    the second switch circuit (18, 118) of the effector (14, 104) is connected to the stationary contact (20) of the first switch circuit (16, 116), and to said end (34a) of the coil (34),
    the insulating gap (42) is shaped to enhance high-speed migration of the arc root onto the electrode (38, 138) when opening of the circuit breaker (12, 112) on a fault occurs and to guarantee the dielectric withstand in the closed state of the circuit breaker, and in the open state of the effector.
  2. The electrical protection apparatus according to claim 1, characterized in that the insulating gap (42) is composed of a first air space (70) situated between the lower part of the stationary contact (20) and the electrode (38) in the shape of a half-loop, and of an intermediate wall (72) made of rigid insulating material acting as support for the stationary contact (20), said wall extending opposite the movable contact (22) between the stationary contact (20) and a conducting branch (76) extending the electrode (38) towards the end (34a) of the coil (34).
  3. The electrical protection apparatus according to claim 2, characterized in that the electrode (38) is provided with an appreciably straight face (78) located in the extension of the plane of the stationary contact pad (20) associated with the first switch circuit (16).
  4. The electrical protection apparatus according to claim 3, characterized in that the electrode (38) is provided with a convex face protruding out from the plane passing through the stationary contact (20) associated with the first switch circuit (16).
  5. The electrical protection apparatus according to claim 2, characterized in that the insulating wall (72) is achieved by moulding with the case (74) of the circuit breaker (12).
  6. The electrical protection apparatus according to one of the claims 1 to 5, characterized in that the movable contact (22, 122) of the first switch circuit (16, 116) is at the potential of the input terminal (28, 128), the other end (34b) of the coil (34, 134) opposite from the electrode (38, 138) being connected to the output terminal (32, 132).
EP94410087A 1993-10-15 1994-10-11 Protective apparatus formed by connecting in series a circuit breaker with a switching device Expired - Lifetime EP0649156B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312407A FR2711271B1 (en) 1993-10-15 1993-10-15 Protective equipment formed by the association of a circuit breaker in series with an effector.
FR9312407 1993-10-15

Publications (2)

Publication Number Publication Date
EP0649156A1 EP0649156A1 (en) 1995-04-19
EP0649156B1 true EP0649156B1 (en) 1999-07-28

Family

ID=9451956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94410087A Expired - Lifetime EP0649156B1 (en) 1993-10-15 1994-10-11 Protective apparatus formed by connecting in series a circuit breaker with a switching device

Country Status (5)

Country Link
US (1) US5493264A (en)
EP (1) EP0649156B1 (en)
DE (1) DE69419690T2 (en)
ES (1) ES2136183T3 (en)
FR (1) FR2711271B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5614878A (en) * 1995-09-07 1997-03-25 Siemens Energy & Automation, Inc. Two pole remote controlled circuit breaker
FR2846478B1 (en) * 2002-10-25 2004-12-24 Schneider Electric Ind Sas MOBILE ELECTRODE OVERVOLTAGE PROTECTION DEVICE
CN102543606A (en) * 2012-01-19 2012-07-04 江苏普华力拓电器股份有限公司 Miniature circuit breaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL76843C (en) * 1940-04-23
US4456832A (en) * 1979-01-08 1984-06-26 Southern California Edison Company Circuit breaker control device
FR2533363B1 (en) * 1982-09-17 1985-11-08 Merlin Gerin AC CIRCUIT BREAKER EQUIPPED WITH A MAGNETOTHERMAL TRIGGER AND A STATIC SWITCHING MEMBER WITH REMOTE CONTROL
FR2535520A1 (en) * 1982-11-03 1984-05-04 Merlin Gerin CURRENT CUTTING APPARATUS REMOTE CONTROL
FR2584529B1 (en) * 1985-07-04 1995-01-06 Merlin Gerin ELECTRIC CIRCUIT BREAKER, PARTICULARLY FOR CAPACITOR BATTERIES
JPH01298622A (en) * 1988-05-26 1989-12-01 Matsushita Electric Works Ltd Circuit breaker
DE3824027A1 (en) * 1988-07-15 1990-01-18 Asea Brown Boveri ELECTRICAL SWITCHGEAR
JPH02100230A (en) * 1988-10-06 1990-04-12 Mitsubishi Electric Corp Remotely operated type circuit breaker

Also Published As

Publication number Publication date
US5493264A (en) 1996-02-20
EP0649156A1 (en) 1995-04-19
FR2711271A1 (en) 1995-04-21
FR2711271B1 (en) 1995-12-22
DE69419690D1 (en) 1999-09-02
ES2136183T3 (en) 1999-11-16
DE69419690T2 (en) 2000-04-06

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