EP0196241B2 - Single pole and neutral differential circuit breaker - Google Patents

Single pole and neutral differential circuit breaker Download PDF

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Publication number
EP0196241B2
EP0196241B2 EP86400333A EP86400333A EP0196241B2 EP 0196241 B2 EP0196241 B2 EP 0196241B2 EP 86400333 A EP86400333 A EP 86400333A EP 86400333 A EP86400333 A EP 86400333A EP 0196241 B2 EP0196241 B2 EP 0196241B2
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EP
European Patent Office
Prior art keywords
neutral
phase
circuit breaker
circuit
differential
Prior art date
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Expired - Lifetime
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EP86400333A
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German (de)
French (fr)
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EP0196241A1 (en
EP0196241B1 (en
Inventor
William Bartolo
Yves Belin
Yves Bonhomme
Michel Lazareth
Gérard Pion Roux
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Merlin Gerin SA
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Merlin Gerin SA
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Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT86400333T priority Critical patent/ATE47771T1/en
Publication of EP0196241A1 publication Critical patent/EP0196241A1/en
Publication of EP0196241B1 publication Critical patent/EP0196241B1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages
    • H01H83/226Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages with differential transformer
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/002Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor

Definitions

  • the invention relates to a unipolar and neutral differential circuit breaker according to the preamble of claim 1.
  • Document DE-C-1.169.015 describes a differential circuit breaker of the type mentioned in which a differential block, containing a differential transformer and a relay, is attached to a circuit breaker block.
  • the differential block contains a circuit with interrupting contacts and the electrical connection between the two blocks consists of two conductors passing through the separation wall of the two adjoining blocks.
  • the possibility of having all the contacts in the circuit breaker block is simply mentioned, but the embodiment is not specified or shown in the figures.
  • the architecture of the circuit breaker described is opposed to simple connections, not involving special insulation measures.
  • Document EP-A 0 103 167 describes a differential circuit breaker with two separate compartments, one for housing the phase circuit and the other for the neutral circuit. In the phase compartment is housed the test contact of the differential part, while the differential transformer and the associated relay are arranged in the neutral compartment.
  • the differential circuit breaker is not modular and cannot be made from a standard circuit breaker.
  • the document FR-A 2 437 692 relates to a differential circuit breaker constituted by the assembly of a standard bipolar circuit breaker with miniature molded case, and a differential block of the same profile.
  • This assembly is carried out by the installer or the distributor whose stock can thus be limited.
  • the assembly requires an external electrical connection and the load is connected to the terminals of the differential box, different from the terminals of the circuit breaker box used normally, in the absence of a differential block. These connections complicate the task of the installer, especially of an unsophisticated user.
  • the applicant markets a single pole and neutral circuit breaker which is the subject of European patent EP-A 0 042 778 facilitating the task of the user.
  • a single housing In a single housing are incorporated phase cut and neutral contacts connected to two input and output terminals arranged on the two opposite narrow faces of the housing.
  • the user connects the two incoming conductors on one side of the device and the two outgoing conductors on the other side.
  • the simultaneous interruption of the neutral circuit and the phase circuit ensures isolation of the circuit by allowing intervention in complete safety.
  • the need has arisen to have a circuit breaker of this kind which also provides differential protection against earth faults, and the present invention aims to meet this need, by implementing the characteristics of claim 1.
  • the circuit breaker part is a standard circuit breaker, for example described in the aforementioned European patent to which is added a differential block, this addition being carried out in the factory, so as to deliver a single block comprising two input terminals and two output terminals avoiding any Connexion error.
  • the circuit breaker part and the differential part can be integrated side by side in the same molded case, the number of steps, in this case the width, will be greater than that of the standard circuit breaker block. It is also possible to use a standard circuit breaker box, one of the side faces of which is modified to allow the passage of the electrical connections to the differential part housed in an independent box attached at the factory to the circuit breaker box.
  • phase connection conductors are arranged in the upper part of the housing in which a part of the phase circuit extends, in this case the coil of the electromagnetic trip device and the end of the bimetallic strip constituting the thermal trip device. These connection conductors pass over the insulating partition between the phase contacts and the neutral contacts without interfering with the neutral circuit.
  • the neutral connection is made in the lower part and presents no difficulty, the parts to be connected being adjacent.
  • connection of the phase differential part takes place on the one hand at the winding of the electromagnetic trip device, and on the other hand at the free end of the bimetallic strip.
  • This connection limits the number of welds to be made, the winding wire can for example be lengthened to connect directly to the primary winding of the differential part, the braid welded to the end of the bimetallic strip constituting the connection of the other end of the primary winding.
  • the primary neutral winding of the differential part is connected to the neutral circuit of the circuit breaker, preferably by interrupting the connecting conductor of the fixed contact at the output terminal, which avoids any manufacturing of additional complicated parts.
  • a pair of terminals 16, 18 for supplying the device housed in the housing 10, the opposite output face carrying a pair of terminals 20, 22.
  • the opposite terminals 16, 20 belong to a phase circuit housed inside of the housing 10, while the terminals 18, 22 belong to a neutral circuit juxtaposed with the phase circuit.
  • An insulating intermediate partition 24 is interposed between the shells 12, 14 extending parallel to the large lateral faces of the housing 10.
  • the supply terminal 18 carries a fixed contact 26, capable of cooperating with a movable neutral contact 28 carried by an insulating contact arm 30
  • the fixed contact 26 is extended by an arcing horn 32 extending inside an arc extinguishing chamber opposite an arcing horn 34 disposed at the rear of the movable contact 28.
  • the arcing horn 34 is connected by a braid 36 to the movable contact 28 and is extended by a connection conductor 38, which extends transversely to the housing towards an adjacent part containing the differential part of the circuit breaker described below.
  • a second connection conductor 40 parallel to the conductor 38, is extended to the output terminal 22.
  • the phase circuit comprises an input terminal 16 carrying a fixed contact 42 cooperating with a contact mobile 44 carried by the insulating contact arm 30.
  • the fixed contact 42 is extended by an arcing horn 46, disposed opposite an arcing horn 48 connected to the output terminal 20.
  • a braid 50 connects the contact phase mobile 44 at the input of a coil 52 of an electromagnetic trip device, the output of which constitutes a third connection conductor 54 extending towards the differential part 64.
  • a fourth connection conductor 56 in the form of a braid connects the part differential at the end of the bimetallic strip 58 connected to the output terminal 20.
  • the insulating partition 24 separates the neutral contacts 26, 28 from the phase contacts 42, 44 extending in the lower part of the housing 10.
  • the par upper tie of the casing 10 contains the electromagnetic trip device 52 as well as the triggering mechanism designated by the general reference 60 which includes a manual control lever 62.
  • the electromagnetic trip device 52 in the upper part of the case 10, straddles the intermediate partition 24 and occupies the space above the phase and neutral contacts.
  • the aforementioned circuit breaker is described in detail in the aforementioned European patent, with the exception of the connection conductors 38, 40, 54, 56, and it suffices to recall that the neutral contacts 26, 28 and of phase 42, 44 are always in the same closed or open position by being controlled by the same mechanism 60. Only the phase circuit has triggers.
  • the differential part 64 of the housing 10, adjacent to the neutral circuit, contains the elements ensuring the differential protection, in this case the triggering of the mechanism 60 during a ground fault.
  • the differential part 64 contains a toroidal differential transformer 66 carrying primary neutral 68 and phase 70 windings connected respectively to the connection conductors 38, 40 and 54, 56.
  • the differential transformer 66 carries a secondary winding 72 supplying a polarized relay 74.
  • the polarized relay 74 is connected by mechanical links 76 to the mechanism 60 to transmit on the one hand to this mechanism a tripping order, and on the other hand a reset action of the relay 74 after a tripping operation.
  • Such differential blocks are well known to specialists and for example described in the aforementioned French patent.
  • a ground fault results in an imbalance between the currents flowing through the primary windings 68, 70 which induces a secondary current in the winding 72 actuating the relay 74.
  • the differential part 64 naturally includes a test circuit well known to specialists.
  • the unipolar and neutral differential circuit breaker according to the invention can be produced by standard elements of a unipolar and neutral circuit breaker and a differential block, only certain secondary parts, in particular the arc horn 34 and the conductors of connection 40, 56 being replaced by different parts. This replacement being carried out in the factory poses no problem and the device delivered to the customer is used like any normal circuit breaker by connecting the input and output circuits to terminals 16, 18, 20, 22.
  • the circuit breaker part and the differential part 64 can be housed in the same box 10 or possibly be arranged in separate boxes, the side walls of which are joined during assembly. These lateral walls naturally include orifices for the passage of electrical connections 38, 40, 54, 56 and mechanical connections 76.

Abstract

1. A single pole and neutral differential circuit breaker with a moulded case (10) comprising : - a phase circuit having a pair of phase contacts (42, 44) connected to phase input (16) and output terminals (20), respectively located on the two opposing narrow side faces of the case, - a neutral circuit having a pair of neutral contacts (26, 28) juxtaposed to the phase contacts (42, 44) with an interposed insulating separating partition (24), extending parallel to the large side faces of the case, and connected to neutral input (18) and output terminals (22) adjacent to said phase terminals (16, 20), - a manual and automatic operating mechanism (60), having an electromagnetic (52) and/or thermal (58) trip device opening said contacts (26, 28; 42, 44) on a fault, - a differential transformer (66) having a phase primary winding (70), a neutral primary winding (68), and a secondary winding (72), - an electromagnetic relay (74) supplied by said secondary winding (72) and mechanically connected to said mechanism (60), characterized by the fact that said differential transformer (66) and said electromagnetic relay (74) constitute a differential unit, that said phase and neutral circuits, and said manual and automatic operating mechanism (60) with electromagnetic (52) and/or thermal (58) trip device constitute a circuit breaker unit, that said units are housed either in separate cases said side faces of which are adjoined, or in a single case with a separating interface between the circuit breaker unit and the differential unit, that the neutral circuit is adjacent to the differential unit, that said comprises a lower part housing said phase (42, 44) and neutral contacts (26, 28) and that the connecting conductors of the neutral circuit (38, 40) and of the phase circuit (54, 56) to the differential unit extend transversely to said interface or to said adjoined side faces, the neutral circuit connecting conductors (38, 40) being in said lower part of the case, and the phase circuit connecting conductors (54, 56) above this lower part.

Description

L'invention est relative à un disjoncteur différentiel unipolaire et neutre selon le préambule de la revendication 1 .The invention relates to a unipolar and neutral differential circuit breaker according to the preamble of claim 1.

Le document DE-C-1.169.015 décrit un disjoncteur différentiel du genre mentionné dans lequel un bloc différentiel, contenant un transformateur différentiel et un relais, est accolé à un bloc disjoncteur. Dans l'exemple décrit et représenté aux figures le bloc différentiel contient un circuit avec des contacts d'interruption et la liaison électrique entre les deux blocs se résume à deux conducteurs traversant la paroi de séparation des deux blocs accolés. La possibilité de disposer l'ensemble des contacts dans le bloc disjoncteur est simplement évoquée, mais le mode de réalisation n'est pas précisé ni représenté sur les figures. L'architecture du disjoncteur décrit s'oppose à des connexions simples, n'impliquant pas des mesures d'isolement spéciales.Document DE-C-1.169.015 describes a differential circuit breaker of the type mentioned in which a differential block, containing a differential transformer and a relay, is attached to a circuit breaker block. In the example described and shown in the figures, the differential block contains a circuit with interrupting contacts and the electrical connection between the two blocks consists of two conductors passing through the separation wall of the two adjoining blocks. The possibility of having all the contacts in the circuit breaker block is simply mentioned, but the embodiment is not specified or shown in the figures. The architecture of the circuit breaker described is opposed to simple connections, not involving special insulation measures.

Le document EP-A 0 103 167 décrit un disjoncteur différentiel à deux compartiments distincts, l'un de logement du circuit de phase et l'autre du circuit de neutre. Dans le compartiment de phase est logé le contact de test de la partie différentielle, tandis que le transformateur différentiel et le relais associé sont disposés dans le compartiment de neutre. Le disjoncteur différentiel n'est pas modulaire et il ne peut être réalisé à partir d'un disjoncteur standard.Document EP-A 0 103 167 describes a differential circuit breaker with two separate compartments, one for housing the phase circuit and the other for the neutral circuit. In the phase compartment is housed the test contact of the differential part, while the differential transformer and the associated relay are arranged in the neutral compartment. The differential circuit breaker is not modular and cannot be made from a standard circuit breaker.

Le document FR-A 2 437 692 est relatif à un disjoncteur différentiel constitué par l'assemblage d'un disjoncteur bipolaire standard à boîtier moulé miniature, et d'un bloc différentiel de même profil. Cet assemblage est réalisé par l'installateur ou le distributeur dont le stock peut ainsi être limité. L'assemblage nécessite une connexion électrique externe et le raccordement de la charge est effectué sur des bomes du boîtier différentiel, différentes des bornes du boîtier disjoncteur utilisées normalement, en l'absence d'un bloc différentiel. Ces connexions compliquent la tâche de l'installateur, notamment d'un utilisateur peu averti.The document FR-A 2 437 692 relates to a differential circuit breaker constituted by the assembly of a standard bipolar circuit breaker with miniature molded case, and a differential block of the same profile. This assembly is carried out by the installer or the distributor whose stock can thus be limited. The assembly requires an external electrical connection and the load is connected to the terminals of the differential box, different from the terminals of the circuit breaker box used normally, in the absence of a differential block. These connections complicate the task of the installer, especially of an unsophisticated user.

La demanderesse commercialise un disjoncteur unipolaire et neutre faisant l'objet du brevet européen EP-A 0 042 778 facilitant la tâche de l'utilisateur. Dans un boîtier unique sont incorporés des contacts de coupure de phase et de neutre raccordés à deux bornes d'entrée et de sortie disposées sur les deux faces étroites opposées du boîtier. L'utilisateur raccorde les deux conducteurs d'arrivée d'un côté de l'appareil et les deux conducteurs de départ de l'autre côté. La coupure simultanée du circuit de neutre et du circuit de phase assure une isolation du circuit en permettant une intervention en toute sécurité. Le besoin s'est fait sentir de disposer d'un disjoncteur de ce genre assurant de plus une protection différentielle contre les défauts à la terre, et la présente invention a pour but de répondre à ce besoin, par la mise en oeuvre des caractéristiques de la revendication 1.The applicant markets a single pole and neutral circuit breaker which is the subject of European patent EP-A 0 042 778 facilitating the task of the user. In a single housing are incorporated phase cut and neutral contacts connected to two input and output terminals arranged on the two opposite narrow faces of the housing. The user connects the two incoming conductors on one side of the device and the two outgoing conductors on the other side. The simultaneous interruption of the neutral circuit and the phase circuit ensures isolation of the circuit by allowing intervention in complete safety. The need has arisen to have a circuit breaker of this kind which also provides differential protection against earth faults, and the present invention aims to meet this need, by implementing the characteristics of claim 1.

La partie disjoncteur est un disjoncteur standard, par exemple décrit dans le brevet européen précité auquel est adjoint un bloc différentiel, cette adjonction étant réalisée en usine, de manière à livrer un bloc unique comportant deux bornes d'entrée et deux bornes de sortie évitant toute erreur de connexion. La partie disjoncteur et la partie différentielle peuvent être intégrées côte à côte dans un même boîtier moulé dont le nombre de pas, en l'occurrence la largeur, sera supérieur à celui du bloc disjoncteur standard. Il est également possible d'utiliser un boîtier standard de disjoncteur dont l'une des faces latérales est modifiée pour permettre le passage des connexions électriques vers la partie différentielle logée dans un boîtier indépendant accolé en usine au boîtier du disjoncteur. En disposant la partie différentielle du côté des contacts de neutre, on facilite le raccordement électrique par les conducteurs s'étendant transversalement à l'interface entre les parties disjoncteur et différentielle. Les conducteurs de raccordement de phase sont disposés dans la partie supérieure du boîtier dans laquelle s'étend une partie du circuit de phase, en l'occurrence la bobine du déclencheur électromagnétique et l'extrémité de la bilame constituant le déclencheur thermique. Ces conducteurs de raccordement passent au-dessus de la cloison isolante de séparation entre les contacts de phase et les contacts de neutre sans interférer avec le circuit de neutre. Le raccordement de neutre s'opère dans la partie inférieure et ne présente aucune difficulté, les parties à raccorder étant adjacentes.The circuit breaker part is a standard circuit breaker, for example described in the aforementioned European patent to which is added a differential block, this addition being carried out in the factory, so as to deliver a single block comprising two input terminals and two output terminals avoiding any Connexion error. The circuit breaker part and the differential part can be integrated side by side in the same molded case, the number of steps, in this case the width, will be greater than that of the standard circuit breaker block. It is also possible to use a standard circuit breaker box, one of the side faces of which is modified to allow the passage of the electrical connections to the differential part housed in an independent box attached at the factory to the circuit breaker box. By placing the differential part on the neutral contact side, the electrical connection is facilitated by the conductors extending transversely at the interface between the circuit breaker and differential parts. The phase connection conductors are arranged in the upper part of the housing in which a part of the phase circuit extends, in this case the coil of the electromagnetic trip device and the end of the bimetallic strip constituting the thermal trip device. These connection conductors pass over the insulating partition between the phase contacts and the neutral contacts without interfering with the neutral circuit. The neutral connection is made in the lower part and presents no difficulty, the parts to be connected being adjacent.

Selon un développement de l'invention, le raccordement de la partie différentielle de phase s'effectue d'une part au bobinage du déclencheur électromagnétique, et d'autre part à l'extrémité libre de la bilame. Ce raccordement limite le nombre de soudures à effectuer, le fil du bobinage pouvant par exemple être allongé pour se raccorder directement à l'enroulement primaire de la partie différentielle, la tresse soudée à l'extrémité de la bilame constituant le raccordement de l'autre extrémité de l'enroulement primaire. L'enroulement primaire de neutre de la partie différentielle est raccordé au circuit de neutre du disjoncteur, de préférence par interruption du conducteur de liaison du contact fixe à la borne de sortie ce qui évite toute fabrication de pièces compliquées additionnelles.According to a development of the invention, the connection of the phase differential part takes place on the one hand at the winding of the electromagnetic trip device, and on the other hand at the free end of the bimetallic strip. This connection limits the number of welds to be made, the winding wire can for example be lengthened to connect directly to the primary winding of the differential part, the braid welded to the end of the bimetallic strip constituting the connection of the other end of the primary winding. The primary neutral winding of the differential part is connected to the neutral circuit of the circuit breaker, preferably by interrupting the connecting conductor of the fixed contact at the output terminal, which avoids any manufacturing of additional complicated parts.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de mise en oeuvre de l'invention représenté aux dessins annexés, dans lesquels :

  • la figure 1 est une vue schématique en élévation et en coupe suivant la ligne I-I de la fig. 2, d'un disjoncteur selon l'invention;
  • la figure 2 est une vue en plan du disjoncteur selon la figure 1, représenté en position éclatée des parties différentielle et disjoncteur;
  • la figure 3 représente en perspective le schéma électrique du disjoncteur.
Other advantages and characteristics will emerge more clearly from the following description of an embodiment of the invention shown in the accompanying drawings, in which:
  • Figure 1 is a schematic elevational view in section along line II of FIG. 2, of a circuit breaker according to the invention;
  • Figure 2 is a plan view of the circuit breaker according to Figure 1, shown in the exploded position of the differential parts and circuit breaker;
  • Figure 3 shows in perspective the circuit diagram of the circuit breaker.

Sur les figures, un boîtier moulé 10 de forme générale parallélépipédique correspondant au système modulaire commercialement dénommé MULTI 9, est constitué par l'assemblage de deux demi-coquilles 12, 14. Sur l'une des faces latérales étroites du boîtier 10 est disposée une paire de bornes 16, 18 d'alimentation de l'appareil logé dans le boîtier 10, la face opposée de sortie portant une paire de bornes 20, 22. Les bornes opposées 16, 20 appartiennent à un circuit de phase logé à l'intérieur du boîtier 10, tandis que les bornes 18, 22 appartiennent à un circuit de neutre juxtaposé au circuit de phase. Une cloison intermédiaire isolante 24 est intercalée entre les coquilles 12, 14 en s'étendant parallèlement aux grandes faces latérales du boîtier 10.In the figures, a molded box 10 of generally parallelepiped shape corresponding to the modular system commercially known as MULTI 9, is constituted by the assembly of two half-shells 12, 14. On one of the narrow lateral faces of the box 10 is arranged a pair of terminals 16, 18 for supplying the device housed in the housing 10, the opposite output face carrying a pair of terminals 20, 22. The opposite terminals 16, 20 belong to a phase circuit housed inside of the housing 10, while the terminals 18, 22 belong to a neutral circuit juxtaposed with the phase circuit. An insulating intermediate partition 24 is interposed between the shells 12, 14 extending parallel to the large lateral faces of the housing 10.

En se référant plus particulièrement à la figure 1, qui montre le circuit de neutre, on voit que la borne d'alimentation 18 porte un contact fixe 26, susceptible de coopérer avec un contact mobile de neutre 28 porté par un bras de contact isolant 30. Le contact fixe 26 est prolongé par une corne d'arc 32 s'étendant à l'intérieur d'une chambre d'extinction d'arc en regard d'une corne d'arc 34 disposée à l'arrière du contact mobile 28. La corne d'arc 34 est reliée par une tresse 36 au contact mobile 28 et se prolonge par un conducteur de raccordement 38, qui s'étend transversalement au boîtier vers une partie adjacente contenant la partie différentielle du disjoncteur décrit ci-dessous. Un deuxième conducteur de raccordement 40 parallèle au conducteur 38, est prolongé jusqu'à la borne de sortie 22. Le circuit de phase, analogue au circuit de neutre précité, comporte une borne d'entrée 16 portant un contact fixe 42 coopérant avec un contact mobile 44 porté par le bras de contact isolant 30. Le contact fixe 42 se prolonge par une corne d'arc 46, disposée en regard d'une corne d'arc 48 reliée à la borne de sortie 20. Une tresse 50 relie le contact mobile de phase 44 à l'entrée d'une bobine 52 d'un déclencheur électromagnétique dont la sortie constitue un troisième conducteur de raccordement 54 s'étendant vers la partie différentielle 64. Un quatrième conducteur de raccordement 56 en forme de tresse relie la partie différentielle à l'extrémité de la bilame 58 raccordée à la borne de sortie 20. La cloison isolante 24 sépare les contacts de neutre 26, 28 des contacts de phase 42, 44 en s'étendant dans la partie inférieure du boîtier 10. La partie supérieure du boîtier 10 contient le déclencheur électromagnétique 52 ainsi que le mécanisme de déclenchement désigné par le repère général 60 qui comprend une manette de commande manuelle 62. Le déclencheur électromagnétique 52, dans la partie supérieure du boîtier 10, chevauche la cloison intermédiaire 24 et occupe l'espace au-dessus des contacts de phase et de neutre.Referring more particularly to FIG. 1, which shows the neutral circuit, it can be seen that the supply terminal 18 carries a fixed contact 26, capable of cooperating with a movable neutral contact 28 carried by an insulating contact arm 30 The fixed contact 26 is extended by an arcing horn 32 extending inside an arc extinguishing chamber opposite an arcing horn 34 disposed at the rear of the movable contact 28. The arcing horn 34 is connected by a braid 36 to the movable contact 28 and is extended by a connection conductor 38, which extends transversely to the housing towards an adjacent part containing the differential part of the circuit breaker described below. A second connection conductor 40 parallel to the conductor 38, is extended to the output terminal 22. The phase circuit, analogous to the above neutral circuit, comprises an input terminal 16 carrying a fixed contact 42 cooperating with a contact mobile 44 carried by the insulating contact arm 30. The fixed contact 42 is extended by an arcing horn 46, disposed opposite an arcing horn 48 connected to the output terminal 20. A braid 50 connects the contact phase mobile 44 at the input of a coil 52 of an electromagnetic trip device, the output of which constitutes a third connection conductor 54 extending towards the differential part 64. A fourth connection conductor 56 in the form of a braid connects the part differential at the end of the bimetallic strip 58 connected to the output terminal 20. The insulating partition 24 separates the neutral contacts 26, 28 from the phase contacts 42, 44 extending in the lower part of the housing 10. The par upper tie of the casing 10 contains the electromagnetic trip device 52 as well as the triggering mechanism designated by the general reference 60 which includes a manual control lever 62. The electromagnetic trip device 52, in the upper part of the case 10, straddles the intermediate partition 24 and occupies the space above the phase and neutral contacts.

Le disjoncteur susmentionné est décrit en détail dans le brevet européen précité, à l'exception des conducteurs de raccordement 38, 40, 54, 56, et il suffit de rappeler que les contacts de neutre 26, 28 et de phase 42, 44 sont toujours dans la même position fermée ou ouverte en étant commandés par un même mécanisme 60. Seul le circuit de phase comporte des déclencheurs. La partie différentielle 64 du boîtier 10, adjacente au circuit de neutre, contient les éléments assurant la protection différentielle, en l'occurrence le déclenchement du mécanisme 60 lors d'un défaut à la terre.The aforementioned circuit breaker is described in detail in the aforementioned European patent, with the exception of the connection conductors 38, 40, 54, 56, and it suffices to recall that the neutral contacts 26, 28 and of phase 42, 44 are always in the same closed or open position by being controlled by the same mechanism 60. Only the phase circuit has triggers. The differential part 64 of the housing 10, adjacent to the neutral circuit, contains the elements ensuring the differential protection, in this case the triggering of the mechanism 60 during a ground fault.

La partie différentielle 64 contient un transformateur différentiel torique 66 portant des enroulements primaires de neutre 68 et de phase 70 reliés respectivement aux conducteurs de raccordement 38, 40 et 54, 56. Le transformateur différentiel 66 porte un enroulement secondaire 72 alimentant un relais polarisé 74. Le relais polarisé 74 est relié par des liaisons mécaniques 76 au mécanisme 60 pour transmettre d'une part à ce mécanisme un ordre de déclenchement, et d'autre part une action de réarmement du relais 74 après une manoeuvre de déclenchement. De tels blocs différentiels sont bien connus des spécialistes et par exemple décrits dans le brevet français précité. Un défaut à la terre se traduit par un déséquilibre entre les courants parcourant les enroulements primaires 68, 70 qui induit un courant secondaire dans l'enroulement 72 actionnant le relais 74. La partie différentielle 64 comprend bien entendu un circuit test bien connu des spécialistes.The differential part 64 contains a toroidal differential transformer 66 carrying primary neutral 68 and phase 70 windings connected respectively to the connection conductors 38, 40 and 54, 56. The differential transformer 66 carries a secondary winding 72 supplying a polarized relay 74. The polarized relay 74 is connected by mechanical links 76 to the mechanism 60 to transmit on the one hand to this mechanism a tripping order, and on the other hand a reset action of the relay 74 after a tripping operation. Such differential blocks are well known to specialists and for example described in the aforementioned French patent. A ground fault results in an imbalance between the currents flowing through the primary windings 68, 70 which induces a secondary current in the winding 72 actuating the relay 74. The differential part 64 naturally includes a test circuit well known to specialists.

En disposant la partie différentielle 64 du côté des contacts de neutre 26, 28 les conducteurs de raccordement de neutre 38, 40 peuvent être disposés dans la partie inférieure du boîtier 10, tandis que les conducteurs de raccordement de phase 54, 56 passent au-dessus de la cloison 24 vers la partie différentielle 64 sans interférer avec le circuit de neutre. On comprend que le disjoncteur différentiel unipolaire et neutre selon l'invention peut être réalisé par des éléments standard d'un disjoncteur unipolaire et neutre et d'un bloc différentiel, seules certaines parties secondaires, notamment la corne d'arc 34 et les conducteurs de raccordement 40, 56 étant remplacées par des pièces différentes. Ce remplacement s'effectuant en usine ne pose aucun problème et l'appareil livré au client s'utilise comme tout disjoncteur normal en raccordant les circuits d'entrée et de sortie aux bornes 16, 18, 20, 22.By placing the differential part 64 on the side of the neutral contacts 26, 28 the neutral connection conductors 38, 40 can be arranged in the lower part of the housing 10, while the phase connection conductors 54, 56 pass over from the partition 24 towards the differential part 64 without interfering with the neutral circuit. It is understood that the unipolar and neutral differential circuit breaker according to the invention can be produced by standard elements of a unipolar and neutral circuit breaker and a differential block, only certain secondary parts, in particular the arc horn 34 and the conductors of connection 40, 56 being replaced by different parts. This replacement being carried out in the factory poses no problem and the device delivered to the customer is used like any normal circuit breaker by connecting the input and output circuits to terminals 16, 18, 20, 22.

La partie disjoncteur et la partie différentielle 64 peuvent être logées dans un même boîtier 10 ou éventuellement être disposées dans des boîtiers séparés dont les parois latérales sont accolées lors du montage. Ces parois latérales comprennent bien entendu des orifices de passage des connexions électriques 38, 40, 54, 56 et des liaisons mécaniques 76.The circuit breaker part and the differential part 64 can be housed in the same box 10 or possibly be arranged in separate boxes, the side walls of which are joined during assembly. These lateral walls naturally include orifices for the passage of electrical connections 38, 40, 54, 56 and mechanical connections 76.

Claims (6)

  1. A single pole and neutral differential circuit breaker with a moulded case (10) comprising :
    - a phase circuit having a pair of phase contacts (42, 44) connected to phase input (16) and output terminals (20), respectively located on the two opposing narrow side faces of the case,
    - a neutral circuit having a pair of neutral contacts (26, 28) juxtaposed to the phase contacts (42, 44) with an interposed insulating separating partition (24), extending parallel to the large side faces of the case, and connected to neutral input (18) and output terminals (22) adjacent to said phase terminals (16, 20),
    - a manual and automatic operating mechanism (60), having an electromagnetic (52) and/or thermal (58) trip device opening said contacts (26, 28, 42, 44) on a fault,
    - a differential transformer (66) having a phase primary winding (70), a neutral primary winding (68), and a secondary winding (72),
    - an electromagnetic relay (74) supplied by said secondary winding (72) and mechanically connected to said mechanism (60), circuit breaker in which said differential transformer (66) and said electromagnetic relay (74) constitute a differential unit in which that said phase and neutral circuits, said manual and automatic operating mechanism (60) with electromagnetic (52) and/or thermal (58) trip device constitute a circuit breaker unit, and in which that said units are housed either in separate cases said side faces of which are adjoined, or in a same case with a separating interface same between the circuit breaker unit and the differential unit, electric connecting conductors between said units extending transversely to said interface or faces, characterised in that the neutral circuit is adjacent to the differential unit, that said case comprises a lower part housing said phase (42, 44) and neutral contacts (26, 28) and that the said connecting conductors (38, 40) of the neutral circuit are arranged in said lower part of the case, and that the phase circuit connecting conductors (54, 56) are arranged above this lower part.
  2. The circuit breaker according to claim 1, characterized by the fact that the case (10) comprises an upper part housing said mechanism (60) and that the connecting conductors (56, 58) of the phase circuit to the differential unit extend transversely to said interface or to said adjoined side faces in said upper part.
  3. The circuit breaker according to claim 1 or 2, characterized by the fact that the phase primary winding (70) is connected on the one hand to one of the ends of the electromagnetic trip device coil (52) and on the other hand to the free end of the thermal trip device (58).
  4. The circuit breaker according to claim 1, 2 or 3, characterized by the fact that said mechanism (60) is located above the partition (24) separating the contacts (26, 28, 42, 44) the height of which is limited to the lower part of the case (10).
  5. The circuit breaker according to claim 1, 2, 3 or 4, characterized by the fact that the circuit breaker unit is a standard single pole and neutral circuit breaker, fitted in a widened case (10) for adjacent housing of the differential unit (64), the circuit breaker and differential units being connected by four electrical connections (38, 40, 54, 56) and two mechanical connections (76) respectively for tripping and resetting, said connections being internal to the case (10).
  6. The circuit breaker according to claim 1, 2, 3 or 4, characterized by the fact that the circuit breaker unit is a standard single pole and neutral circuit breaker with a openings for electrical (38, 40, 54, 56) and mechanical connections (76) to pass through and that the differential unit (64) is housed in a case of the same profile adjoined to said large side face.
EP86400333A 1985-02-27 1986-02-18 Single pole and neutral differential circuit breaker Expired - Lifetime EP0196241B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86400333T ATE47771T1 (en) 1985-02-27 1986-02-18 SINGLE-PHASE AND NEUTRAL DIFFERENTIAL CIRCUIT BREAKER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8503012A FR2578093B1 (en) 1985-02-27 1985-02-27 UNIPOLAR AND NEUTRAL DIFFERENTIAL CIRCUIT BREAKER
FR8503012 1985-02-27

Publications (3)

Publication Number Publication Date
EP0196241A1 EP0196241A1 (en) 1986-10-01
EP0196241B1 EP0196241B1 (en) 1989-11-02
EP0196241B2 true EP0196241B2 (en) 1996-09-04

Family

ID=9316764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400333A Expired - Lifetime EP0196241B2 (en) 1985-02-27 1986-02-18 Single pole and neutral differential circuit breaker

Country Status (6)

Country Link
EP (1) EP0196241B2 (en)
AT (1) ATE47771T1 (en)
DE (1) DE3666749D1 (en)
ES (1) ES8704672A1 (en)
FR (1) FR2578093B1 (en)
PT (1) PT82080B (en)

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Also Published As

Publication number Publication date
ES8704672A1 (en) 1987-04-16
ES552395A0 (en) 1987-04-16
PT82080A (en) 1986-03-01
DE3666749D1 (en) 1989-12-07
EP0196241A1 (en) 1986-10-01
PT82080B (en) 1992-05-29
EP0196241B1 (en) 1989-11-02
ATE47771T1 (en) 1989-11-15
FR2578093B1 (en) 1987-03-06
FR2578093A1 (en) 1986-08-29

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