EP0076719A1 - Multipole circuit breaker with removable trip unit - Google Patents

Multipole circuit breaker with removable trip unit Download PDF

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Publication number
EP0076719A1
EP0076719A1 EP82401699A EP82401699A EP0076719A1 EP 0076719 A1 EP0076719 A1 EP 0076719A1 EP 82401699 A EP82401699 A EP 82401699A EP 82401699 A EP82401699 A EP 82401699A EP 0076719 A1 EP0076719 A1 EP 0076719A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
connection
trip unit
block
trip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82401699A
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German (de)
French (fr)
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EP0076719B1 (en
Inventor
Alain Gerbert-Gaillard
Robert Morel
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
Original Assignee
Merlin Gerin SA
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0076719A1 publication Critical patent/EP0076719A1/en
Application granted granted Critical
Publication of EP0076719B1 publication Critical patent/EP0076719B1/en
Expired legal-status Critical Current

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    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7409—Interchangeable elements
    • 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
    • H01H71/08—Terminals; Connections

Definitions

  • the invention relates to an electric circuit breaker, in particular with a molded case, having a circuit breaker block for housing the breaking contacts and the control mechanism for said contacts and a removable tripping block for housing the thermal and / or magnetic tripping elements associated with different poles for controlling the triggering of the mechanism in the event of overload and / or fault, said trip unit comprising for each pole a section of power conductor electrically connected in series by a disconnectable connection to an associated section of conductor of the circuit breaker block containing the cut-off contacts, said tripping elements reacting to overcurrents and short-circuit of the currents flowing through said conductors.
  • the object of the present invention is to remedy these drawbacks and to allow the production of a circuit breaker with an easily removable trip unit and with reduced overall dimensions.
  • the circuit breaker according to the invention is characterized in that the disconnectable connection of each conductor has a connection area making an acute angle with the general direction of said conductors in the circuit breaker.
  • connection pads allows an oblique arrangement of the clamping screws and the screw access holes which are perpendicular to the pads. These screws no longer open on the front face of the circuit breaker crossing the entire height of the housing, but on the side face carrying the connection terminals. This reduces the overall length at the expense of the overall height, but the space available in this area is sufficient to accommodate the inclined areas under the mechanism of the trigger block.
  • connection screws advantageously simultaneously secure the trip unit block on the circuit breaker block, the connection pads of one of the blocks being resiliently mounted to compensate for positioning faults and allow good contact of the pads of the three poles of the circuit breaker .
  • the inclined pads are arranged in the lower part of the trigger block to facilitate access to these screws and ensure good fixing of the block.
  • the section of conductor associated with the trip unit is folded in a loop to cross the magnetic circuit of the electromagnetic trip device and ends with the inclined connection area located below this magnetic circuit. This range comes into contact with the associated range carried by the base of the circuit breaker block when the trip unit is put in place. The connection area is thus transferred under the trip unit and the electrodynamic forces generated in the loop increase the contact pressure of the pads.
  • a multipolar circuit breaker 10 with molded housing for example a three-phase circuit breaker, is constituted by the assembly of a circuit breaker block 12 and a trip block 14 on a base 16 belonging to the circuit breaker block 12.
  • the base 16 carries the connection terminals 18, 20 for input and output of the circuit breaker, capped by removable terminal covers 22, 24.
  • the circuit breaker of generally parallelepipedal shape is provided on its front face 26, opposite the base 16, with a handle control 28.
  • circuit breaker block 12 In the circuit breaker block 12 are housed the three pairs of separable contacts 30, 32 as well as the control mechanism 34, which causes the displacement of the movable contacts 30 in the open and closed position during an operation manual operation of the lever 28 and the automatic opening on a triggering order of a bar 35 of the trigger block 14.
  • the mechanism 34 and the connections between this mechanism 34 and the movable contacts 30 and the trigger block 14 are shown diagrammatically on the Figure 1, such devices being well known to specialists.
  • each pole is inserted in a power conductor 36 which extends between the terminals 18, 20 along the base 16 crossing the trip unit 14, which contains for each pole a thermal trip device 38 and a trip device electromagnetic 40 causing tripping of the circuit breaker respectively in the event of overload and short-circuit.
  • the trip unit 14 is removable and on the same circuit breaker unit can be mounted any one of a range of trip units with different characteristics.
  • the terminals or pads 18 are integral with the trigger block 14 and removed with the latter during disassembly.
  • Each conductor 36 has a connection 42, which can be disconnected in the junction area of the circuit breaker block 12 and the trip block 14, which is broken by the removal of the trip block 14.
  • Such circuit breakers are well known and it is unnecessary to describe them more in detail.
  • the disconnectable connections 42 are arranged in the lower part of the trip unit 14 and each comprises a connection area 44 inclined, for example by an angle close to 45 ° with the general direction of the conductor 36, that is ie from the base 16.
  • the pad 44 belongs to the circuit breaker block 12 or more exactly it is mounted floating on this block while being connected by a strap 46 to the movable contact 30.
  • On pad 44 is tightened, in the mounted position of the trip unit 14, the end 48 of the section 50 of the conductor 36 passing through the trip unit 14.
  • the opposite end of the section 50 is connected to the terminal 18 and the section 50 extends inside the trip unit 14 following a trajectory in loop crossing a U-shaped cylinder head 52 of the circuit magnetic of the electromagnetic trip unit 40. Referring more particularly to FIGS.
  • the width of the section 50 is less than that of the terminal 18, for example by half, so as to clear a passage space for a clamping screw 54.
  • the end 48 is widened to come in front of the pad 44 and the screw 54 passes through aligned orifices provided in the end 48 and the pad 44 before being screwed into a nut 56 carried by the base 16
  • the section 50 is made in tinsel to present a certain flexibility and between the head of the screw 54 and the end 48 is inserted a support tab 58 secured to the cylinder head 52.
  • the cylinder head 52 is rigidly fixed, for example by a screw, not shown, to the housing of the trip unit 14, while the nut 56 is resiliently mounted by a spring 60 on the base 16.
  • the pallet 62 of the electromagnetic trip device is placed opposite the cylinder head 52 while the base of the bimetal 38 is fixed by a screw 64 at the end assembly 48, lug 58.
  • the screw 54 extends perpendicular to the surface 44 while being inclined and opening onto the narrow lateral face of the trigger block 14 on the side of the terminals 18 in an area covered by the cover. terminal 22.
  • the trip unit 14 comprises for each conductor 36 a disconnectable connection 42, that is to say three connections in the envisaged case of the three-pole circuit breaker.
  • the floating mounting of the pads 44 allows effective tightening and good electrical contact on the ends 48 and the legs 58, when the bolts 54 are screwed, 56 despite the inevitable relative positioning defects of the three legs 58. It is clear that after tightening the bolts 54,56, the trigger block 14, the legs 58, the pads 44 and the nuts 56 constitute a rigid assembly fixed to the base 16 by the springs 60 which compensate for the positioning faults of the legs 58.
  • connection pad is used in the description above in its general meaning of contact zone, this pad not necessarily being a rigid flat surface and naturally applying to the contact face of the foils forming the conductor 50.
  • the assembly and disassembly of the trip unit does not require any particular skill or knowledge and can be carried out by the user or the distributor, allowing a reduction in device stocks. Any false maneuver is excluded, the correct tightening of the three screws translates a correct fixing and a good electrical connection. After fitting and possibly sealing the terminal cover, the connection screws are inaccessible. We can consider other means of tightening than screws, the main thing being access to these tightening means from the side face of the circuit breaker housing to reduce the length of the housing.
  • the fixing screw is not necessarily offset laterally, passage through a central orifice of the conductor being possible, by isolating the conductor screw by any suitable means, for example by interposing an insulator or using a screw in insulating material.

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  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

Les connexions déconnectables (42) entre le bloc déclencheur (14) amovible et le bloc disjoncteur (12) comprennent des plages de connexion (44) inclinées de manière à reporter sur la face latérale étroite du boîtier du disjoncteur les accès aux vis de serrage (54) des connexions (42).The disconnectable connections (42) between the removable trip unit (14) and the circuit breaker unit (12) include connection areas (44) inclined so as to transfer the access to the clamping screws to the narrow side face of the circuit breaker housing. 54) connections (42).

Description

L'invention est relative à un disjoncteur électrique, notamment à boîtier moulé, ayant un bloc disjoncteur de logement des contacts de coupure et du mécanisme de commande desdits contacts et un bloc déclencheur amovible de logement des éléments de déclenchement thermique et/ou magnétique associés aux différents pôles pour commander le déclenchement du mécanisme en cas de surcharge et/ou de défaut, ledit bloc déclencheur comprenant pour chaque pôle un tronçon de conducteur de puissance connecté électriquement en série par une connexion déconnectable à un tronçon associé de conducteur du bloc disjoncteur contenant les contacts de coupure, lesdits éléments de déclenchement réagissant aux surintensités et court-circuit des courants parcourant lesdits conducteurs.The invention relates to an electric circuit breaker, in particular with a molded case, having a circuit breaker block for housing the breaking contacts and the control mechanism for said contacts and a removable tripping block for housing the thermal and / or magnetic tripping elements associated with different poles for controlling the triggering of the mechanism in the event of overload and / or fault, said trip unit comprising for each pole a section of power conductor electrically connected in series by a disconnectable connection to an associated section of conductor of the circuit breaker block containing the cut-off contacts, said tripping elements reacting to overcurrents and short-circuit of the currents flowing through said conductors.

Il est connu de disposer d'une gamme de blocs déclencheurs de caractéristiques de déclenchement différentes, pouvant être sélectivement associés à un même bloc disjoncteur pour constituer des disjoncteurs de calibres différents. Lors de la mise en place du bloc déclencheur on assure la connexion électrique des conducteurs de puissance par serrage de vis de connexion. Ces vis sont intercalées entre le bloc déclencheur et la tresse d'amenée de courant au contact mobile pour permettre leur accès par la face frontale du disjoncteur, ce qui nécessite un allongement des conducteurs et du boîtier du disjoncteur. La fixation du bloc déclencheur est de plus réalisée indépendamment de la connexion électrique, compliquant ainsi la tâche de l'utilisateur ou du distributeur.It is known to have a range of trip blocks with different trip characteristics, which can be selectively associated with the same circuit breaker block to form circuit breakers of different ratings. When installing the trip unit, the electrical conductors are connected electrically by tightening connection screws. These screws are interposed between the trip unit and the braid supplying current to the movable contact to allow their access by the front face of the circuit breaker, which requires an elongation of the conductors and the case of the circuit breaker. The trigger block is also fixed independently of the electrical connection, thus complicating the task of the user or the distributor.

On a déjà proposé la suppression de la connexion déconnectable en prévoyant un circuit magnétique de détection en deux parties séparables, l'une solidaire du bloc déclencheur et l'autre du bloc disjoncteur. Cette solution est intéressante pour un déclencheur thermique à transformateur d'intensité, mais elle est difficilement applicable à un déclencheur à bilame portée par un chauffeur.The removal of the disconnectable connection has already been proposed by providing a magnetic detection circuit in two separable parts, one integral with the trip unit and the other with the circuit breaker unit. This solution is interesting for a thermal trip device with current transformer, but it is difficult to apply to a bimetallic trip unit carried by a driver.

La présente invention a pour but de remédier à ces inconvénients et de permettre la réalisation d'un disjoncteur à bloc déclencheur facilement amovible et à encombrement réduit.The object of the present invention is to remedy these drawbacks and to allow the production of a circuit breaker with an easily removable trip unit and with reduced overall dimensions.

Le disjoncteur selon l'invention est caractérisé par le fait que la connexion déconnectable de chaque conducteur présente une plage de connexion faisant un angle aigu avec la direction générale desdits conducteurs dans le disjoncteur.The circuit breaker according to the invention is characterized in that the disconnectable connection of each conductor has a connection area making an acute angle with the general direction of said conductors in the circuit breaker.

La disposition en oblique des plages de connexion permet une disposition oblique des vis de serrage et des trous d'accès aux vis qui sont perpendiculaires aux plages. Ces vis ne débouchent-plus sur la face frontale du disjoncteur en traversant toute Ïa hauteur du boîtier, mais sur la face latéralc portant les bornes de raccordement. On réduit ainsi l'encombrement en longueur au détriment de l'encombrement en hauteur, mais la place disponible dans cette zone est suffisante pour loger les plages inclinées sous le mécanisme du bloc déclencheur.The oblique arrangement of the connection pads allows an oblique arrangement of the clamping screws and the screw access holes which are perpendicular to the pads. These screws no longer open on the front face of the circuit breaker crossing the entire height of the housing, but on the side face carrying the connection terminals. This reduces the overall length at the expense of the overall height, but the space available in this area is sufficient to accommodate the inclined areas under the mechanism of the trigger block.

Les vis de connexion assurent avantageusement en même temps la fixation du bloc déclencheur sur le bloc disjoncteur, les plages de connexion de l'un des blocs étant montées élastiquement pour compenser les défauts de positionnement et permettre un bon contact des plages des trois pôles du disjoncteur. Les plages inclinées sont disposées dans la partie inférieure du bloc déclencheur pour faciliter l'accès à ces vis et assurer une bonne fixation du bloc. Le tronçon de conducteur associé au bloc déclencheur est replié en boucle pour traverser le circuit magnétique du déclencheur électromagnétique et se termine par la plage de connexion inclinée située en-dessous de ce circuit magnétique. Cette plage vient au contact de la plage associée portée par le socle du bloc disjoncteur lors de la mise en place du déclencheur. La zone de connexion est ainsi reportée sous le bloc déclencheur et les forces électrodynamiques engendrées dans la boucle augmentent la pression de contact des plages.The connection screws advantageously simultaneously secure the trip unit block on the circuit breaker block, the connection pads of one of the blocks being resiliently mounted to compensate for positioning faults and allow good contact of the pads of the three poles of the circuit breaker . The inclined pads are arranged in the lower part of the trigger block to facilitate access to these screws and ensure good fixing of the block. The section of conductor associated with the trip unit is folded in a loop to cross the magnetic circuit of the electromagnetic trip device and ends with the inclined connection area located below this magnetic circuit. This range comes into contact with the associated range carried by the base of the circuit breaker block when the trip unit is put in place. The connection area is thus transferred under the trip unit and the electrodynamic forces generated in the loop increase the contact pressure of the pads.

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

  • la figure 1 est une vue schématique en élévation d'un disjoncteur selon l'invention, la face latérale du boîtier étant supposée enlevée;
  • la figure 2 est une vue de détail à échelle agrandie de la figure 1, montrant la partie inférieure du bloc déclencheur;
  • les figures 3 et 4 sont respectivement des vues en plan et de côté de la figure 2;
  • la figure 5 est une vue analogue à celle de la figure 2, en coupe suivant le plan contenant la vis de connexion, le bloc déclencheur étant fixé sur le socle.
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:
  • Figure 1 is a schematic elevational view of a circuit breaker according to the invention, the side face of the housing being assumed removed;
  • Figure 2 is a detail view on an enlarged scale of Figure 1 showing the lower part of the trigger unit;
  • Figures 3 and 4 are plan and side views of Figure 2 respectively;
  • Figure 5 is a view similar to that of Figure 2, in section along the plane containing the connection screw, the trigger block being fixed on the base.

Sur les figures, un disjoncteur multipolaire 10 à boîtier moulé, par exemple un disjoncteur triphasé, est constitué par l'assemblage d'un bloc disjoncteur 12 et d'un bloc déclencheur 14 sur un socle 16 appartenant au bloc disjoncteur 12. Le socle 16 porte les bornes de raccordement 18, 20 d'entrée et de sortie du disjoncteur, coiffées par des cache-borne amovibles22, 24. Le disjoncteur de forme générale parallélépipédique est muni sur sa face frontale 26, opposée au socle 16, d'une manette de commande 28. Dans le bloc disjoncteur 12 sont logés les trois paires de contacts séparables 30, 32 ainsi que le mécanisme de commande 34, qui provoque le déplacement des contacts mobiles 30 en position d'ouverture et de fermeture lors d'une manoeuvre manuelle de la manette 28 et l'ouverture automatique sur un ordre de déclenchement d'un barreau 35 du bloc déclencheur 14. Le mécanisme 34 et les liaisons entre ce mécanisme 34 et les contacts mobiles 30 et le bloc déclencheur 14 sont représentés schématiquement sur la figure 1, de tels dispositifs étant bien connus des spécialistes.In the figures, a multipolar circuit breaker 10 with molded housing, for example a three-phase circuit breaker, is constituted by the assembly of a circuit breaker block 12 and a trip block 14 on a base 16 belonging to the circuit breaker block 12. The base 16 carries the connection terminals 18, 20 for input and output of the circuit breaker, capped by removable terminal covers 22, 24. The circuit breaker of generally parallelepipedal shape is provided on its front face 26, opposite the base 16, with a handle control 28. In the circuit breaker block 12 are housed the three pairs of separable contacts 30, 32 as well as the control mechanism 34, which causes the displacement of the movable contacts 30 in the open and closed position during an operation manual operation of the lever 28 and the automatic opening on a triggering order of a bar 35 of the trigger block 14. The mechanism 34 and the connections between this mechanism 34 and the movable contacts 30 and the trigger block 14 are shown diagrammatically on the Figure 1, such devices being well known to specialists.

Les contacts 30, 32 de chaque pôle sont insérés dans un conducteur de puissance 36 qui s'étend entre les bornes 18, 20 le long du socle 16 en traversant le bloc déclencheur 14, lequel contient pour chaque pôle un déclencheur thermique 38 et un déclencheur électromagnétique 40 provoquant le déclenchement du disjoncteur respectivement en cas de surcharge et de court-circuit. Le bloc déclencheur 14 est amovible et sur un même bloc disjoncteur peut être monté l'un quelconque d'une gamme de blocs déclencheurs de caractéristiques différentes. Les bornes ou plages 18 sont solidaires du bloc déclencheur 14 et enlevées avec ce dernier lors du démontage. Chaque conducteur 36 comporte une connexion 42, déconnectable dans la zone de jonction du bloc disjoncteur 12 et du bloc déclencheur 14, qui est rompue par l'enlèvement du bloc déclencheur 14. De tels disjoncteurs sont bien connus et il est inutile de les décrire plus en détail.The contacts 30, 32 of each pole are inserted in a power conductor 36 which extends between the terminals 18, 20 along the base 16 crossing the trip unit 14, which contains for each pole a thermal trip device 38 and a trip device electromagnetic 40 causing tripping of the circuit breaker respectively in the event of overload and short-circuit. The trip unit 14 is removable and on the same circuit breaker unit can be mounted any one of a range of trip units with different characteristics. The terminals or pads 18 are integral with the trigger block 14 and removed with the latter during disassembly. Each conductor 36 has a connection 42, which can be disconnected in the junction area of the circuit breaker block 12 and the trip block 14, which is broken by the removal of the trip block 14. Such circuit breakers are well known and it is unnecessary to describe them more in detail.

Selon la présente invention, les connexions déconnectables 42 sont disposées dans la partie inférieure du bloc déclencheur 14 et chacune comporte une plage de connexion 44 inclinée, par exemple d'un angle voisin de 45° avec la direction générale du conducteur 36, c'est-à-dire du socle 16. La plage 44 appartient au bloc disjoncteur 12 ou plus exactement elle est montée flottante sur ce bloc en étant reliée par unetresse 46 au contact mobile 30. Sur la plage 44 est serrée, en position montée du bloc déclencheur 14, l'extrémité 48 du tronçon 50 du conducteur 36 traversant le bloc déclencheur 14. L'extrémité opposée du tronçon 50 est raccordée à la borne 18 et le tronçon 50 s'étend à l'intérieur du bloc déclencheur 14 suivant une trajectoire en boucle en traversant une culasse 52 en U du circuit magnétique du déclencheur électromagnétique 40. En se référant plus particulièrement aux figures 2 à 5, on voit que la largeur du tronçon 50 est inférieure à celle de la borne 18, par exemple de moitié, de manière à dégager un espace de passage d'une vis de serrage 54. L'extrémité 48 est élargie pour venir en face de la plage 44 et la vis 54 traverse des orifices alignés ménagés dans l'extrémité 48 et la plage 44 avant de se visser dans un écrou 56 porté par le socle 16. Le tronçon 50 est réalisé en clinquant pour présenter une certaine flexibilité et entre la tête de la vis 54 et l'extrémité 48 est insérée une patte de support 58 solidaire de la culasse 52. La culasse 52 est fixée rigidement, par exemple par une vis, non représentée, au boîtier du bloc déclencheur 14, tandis que l'écrou 56 est monté élastiquement par un ressort 60 sur le socle 16. La palette 62 du déclencheur électromagnétique est placée en face de la culasse 52 tandis que la base de la bilame 38 est fixée par une vis 64 à l'ensemble extrémité 48, patte 58. La vis 54 s'étend perpendiculairement à la plage 44 en étant inclinée et en débouchant sur la face latérale étroite du bloc déclencheur 14 du côté des bornes 18 dans une zone recouverte par le cache-borne 22.According to the present invention, the disconnectable connections 42 are arranged in the lower part of the trip unit 14 and each comprises a connection area 44 inclined, for example by an angle close to 45 ° with the general direction of the conductor 36, that is ie from the base 16. The pad 44 belongs to the circuit breaker block 12 or more exactly it is mounted floating on this block while being connected by a strap 46 to the movable contact 30. On pad 44 is tightened, in the mounted position of the trip unit 14, the end 48 of the section 50 of the conductor 36 passing through the trip unit 14. The opposite end of the section 50 is connected to the terminal 18 and the section 50 extends inside the trip unit 14 following a trajectory in loop crossing a U-shaped cylinder head 52 of the circuit magnetic of the electromagnetic trip unit 40. Referring more particularly to FIGS. 2 to 5, it can be seen that the width of the section 50 is less than that of the terminal 18, for example by half, so as to clear a passage space for a clamping screw 54. The end 48 is widened to come in front of the pad 44 and the screw 54 passes through aligned orifices provided in the end 48 and the pad 44 before being screwed into a nut 56 carried by the base 16 The section 50 is made in tinsel to present a certain flexibility and between the head of the screw 54 and the end 48 is inserted a support tab 58 secured to the cylinder head 52. The cylinder head 52 is rigidly fixed, for example by a screw, not shown, to the housing of the trip unit 14, while the nut 56 is resiliently mounted by a spring 60 on the base 16. The pallet 62 of the electromagnetic trip device is placed opposite the cylinder head 52 while the base of the bimetal 38 is fixed by a screw 64 at the end assembly 48, lug 58. The screw 54 extends perpendicular to the surface 44 while being inclined and opening onto the narrow lateral face of the trigger block 14 on the side of the terminals 18 in an area covered by the cover. terminal 22.

Le bloc déclencheur 14 comporte pour chaque conducteur 36 une connexion déconnectable 42, c'est-à-dire trois connexions dans le cas envisagé du disjoncteur tripolaire. Le montage flottant des plages 44 permet un serrage efficace et un bon contact électrique sur les extrémités 48 et les pattes 58, lors du vissage des boulons 54, 56 malgré les inévitables défauts de positionnement relatif des trois pattes 58. Il est clair qu'après serrage des boulons 54,56, le bloc déclencheur 14, les pattes 58, les plages 44 et les écrous 56 constituent un ensemble rigide fixé au socle 16 par les ressorts 60 qui pallient les défauts de positionnement des pattes 58. En choisissant des ressorts 60 d'une rigidité suffisante le bloc déclencheur 14 est fixé rigidement au bloc disjoncteur 12 par simple serrage des boulons 54, 56, qui assurent en même temps la connexion électrique. Dans l'exemple illustré par les figures la bilame 38 est chauffée au contact du conducteur 36, mais il est à noter que l'invention s'applique à des disjoncteurs à bilame parcourue par le courant ou à des bilames chauffées indirectement par un enroulement porté par la culasse 52. Le déclencheur magnétique 40 peut également être d'un type différent et la disposition de la plage de connexion, notamment la valeur de l'inclinaison, peut être différente sans sortir du cadre de la présente invention. Les montages élastiques palliant les défauts de positionnement peuvent être prévus sur les parties solidaires du bloc déclencheur 14 sans modifier l'agencement ou la mise en oeuvre de l'invention. Le terme plage de connexion est utilisée dans la description ci-dessus dans son acception générale de zone de contact, cette plage n'étant pas obligatoirement une surface plane rigide et s'appliquant naturellement à la face de contact des clinquants formant le conducteur 50.The trip unit 14 comprises for each conductor 36 a disconnectable connection 42, that is to say three connections in the envisaged case of the three-pole circuit breaker. The floating mounting of the pads 44 allows effective tightening and good electrical contact on the ends 48 and the legs 58, when the bolts 54 are screwed, 56 despite the inevitable relative positioning defects of the three legs 58. It is clear that after tightening the bolts 54,56, the trigger block 14, the legs 58, the pads 44 and the nuts 56 constitute a rigid assembly fixed to the base 16 by the springs 60 which compensate for the positioning faults of the legs 58. By choosing springs 60 of sufficient rigidity, the trip unit 14 is rigidly fixed to the circuit breaker unit 12 by simply tightening the bolts 54, 56, which at the same time provide the electrical connection. In the example illustrated by the figures the bimetallic strip 38 is heated in contact with the conductor 36, but it should be noted that the invention applies to bimetallic circuit breakers traversed by the current or to bimetallic strips indirectly heated by a carried winding by the yoke 52. The magnetic trip device 40 can also be of a different type and the arrangement of the connection pad, in particular the value of the inclination, can be different without departing from the scope of the present invention. The elastic assemblies remedying the positioning faults can be provided on the integral parts of the trigger block 14 without modifying the arrangement or the implementation of the invention. The term connection pad is used in the description above in its general meaning of contact zone, this pad not necessarily being a rigid flat surface and naturally applying to the contact face of the foils forming the conductor 50.

Le montage et le démontage du bloc déclencheur ne nécessitent aucune dextérité ou connaissance particulière et peuvent être effectués par l'utilisateur ou le distributeur, en permettant une réduction des stocks d'appareils. Toute fausse manoeuvre est exclue, le bon serrage des trois vis traduisant une fixation correcte et une bonne connexion électrique. Après mise en place et éventuellement plombage du cache-borne les vis de connexion sont inaccessibles. On peut envisager d'autres moyens de serrage que des vis, l'essentiel étant l'accès à ces moyens de serrage à partir de la face latérale du boîtier du disjoncteur pour réduire la longueur du boîtier. La vis de fixation n'est pas obligatoirement décalée latéralement, le passage à travers un orifice central du conducteur étant possible, en isolant la vis du conducteur par tout moyen approprié, par exemple par interposition d'un isolant ou emploi d'une vis en matériau isolant.The assembly and disassembly of the trip unit does not require any particular skill or knowledge and can be carried out by the user or the distributor, allowing a reduction in device stocks. Any false maneuver is excluded, the correct tightening of the three screws translates a correct fixing and a good electrical connection. After fitting and possibly sealing the terminal cover, the connection screws are inaccessible. We can consider other means of tightening than screws, the main thing being access to these tightening means from the side face of the circuit breaker housing to reduce the length of the housing. The fixing screw is not necessarily offset laterally, passage through a central orifice of the conductor being possible, by isolating the conductor screw by any suitable means, for example by interposing an insulator or using a screw in insulating material.

L'invention n'est bien entendu nullement limitée au mode de mise en oeuvre plus particulièrement décrit et représenté aux dessins annexés, mais elle s'étend bien au contraire à toutes les réalisations restant dans le cadre des équivalences.The invention is of course in no way limited to the embodiment more particularly described and shown in the accompanying drawings, but it extends quite the contrary to all the embodiments remaining within the framework of equivalences.

Claims (9)

1. Disjoncteur électrique multipolaire, notamment à boîtier moulé, ayant un bloc disjoncteur (12) de logement des contacts de coupure (30, 32) et du mécanisme (34) de commande desdits contacts et.un bloc déclencheur (14) amovible de logement des éléments de déclenchement thermique (38) et/ou magnétique (40) associés aux différents pôles pour commander le déclenchement du mécanismc (34) en cas de surcharge et/ou de défaut, ledit bloc déclencheur (14) comprenant pour chaque pôle un tronçon (50) de conducteur de puissance (36) connecté électriquement en série par une connexion déconnectable (42) à un tronçon associé de conducteur du bloc disjoncteur (12) contenant les contacts de coupure (30, 32), lesdits éléments de déclenchement (38, 40) réagissant aux surintensités et court-circuit des courants parcourant lesdits conducteurs (36), caractérisé par le fait que la connexion déconnectable (42) de chaque conducteur (36) présente une plage de connexion (44) faisant un angle aigu avec la direction générale desdits conducteurs (36) dans le disjoncteur.1. Multipolar electric circuit breaker, in particular with molded case, having a circuit breaker block (12) for housing the breaking contacts (30, 32) and the mechanism (34) for controlling said contacts and a removable trigger block (14) for housing thermal (38) and / or magnetic (40) trip elements associated with the different poles to control the triggering of the mechanism (34) in the event of overload and / or fault, said trip unit (14) comprising for each pole a section (50) of power conductor (36) electrically connected in series by a disconnectable connection (42) to an associated section of conductor of the circuit breaker block (12) containing the breaking contacts (30, 32), said trip elements (38 , 40) reacting to overcurrents and short-circuit of the currents flowing through said conductors (36), characterized in that the disconnectable connection (42) of each conductor (36) has a connection pad (44) making an acute angle with the say general ction of said conductors (36) in the circuit breaker. 2. Disjoncteur selon la revendication 1, de forme générale parallélépipédique, dans lequel les conducteurs de puissance (36) s'étendent parallèlement au socle (16) du disjoncteur, le bloc déclencheur (14) étant fixé à l'une des extrémités du socle (16) pour former l'une des faces latérales étroites du disjoncteur, caractérisé en ce que lesdites plages de connexion (44) forment un angle aigu avec ledit socle (16), de manière que les pièces de serragè (54) desdites plages de connexion soient accessibles à partir de ladite face latérale étroite.2. A circuit breaker according to claim 1, of generally parallelepiped shape, in which the power conductors (36) extend parallel to the base (16) of the circuit breaker, the trip unit (14) being fixed to one of the ends of the base. (16) to form one of the narrow side faces of the circuit breaker, characterized in that said connection pads (44) form an acute angle with said base (16), so that the clamping pieces (54) of said pads connection are accessible from said narrow side face. 3. Disjoncteur selon la revendication 1 ou 2, caractérisé en ce que chaque connexion déconnectable (42) comporte une pièce de serrage en deux parties (54, 56), l'une (54) portée par le bloc déclencheur (14) et l'autre (56) par le bloc disjoncteur (12) de façon à assurer lors du serrage la connexion électrique et la fixation mécanique du bloc déclencheur (14) sur le bloc disjoncteur (12).3. Circuit breaker according to claim 1 or 2, characterized in that each disconnectable connection (42) comprises a clamping part in two parts (54, 56), one (54) carried by the trip unit (14) and the 'other (56) by the circuit breaker block (12) so as to ensure during tightening the electrical connection and the mechanical fixing of the trip unit (14) on the circuit breaker unit (12). 4. Disjoncteur selon la revendication 3, caractérisé en ce que les plages de connexion (44) et les parties associées (56) des pièces de serrage portées par l'un des blocs sont mcntées élastiquement pour compenser les irrégularités de positionnement des plages de connexion des différents pôles.4. Circuit breaker according to claim 3, characterized in that the connection pads (44) and the associated parts (56) of the clamping parts carried by one of the blocks are elastically mcntées to compensate for the positioning irregularities of the connection pads of the different poles. 5. Disjoncteur selon la revendication 1, 2, 3 ou 4, à bloc déclencheur (14) formant l'une des faces latérales étroites du disjoncteur et portant les bornes de sortie (18) des conducteurs de puissance (36) qui s'étendent parallèlement au socle (16), caractérisé en ce que lesdites connexions déconnectables (42) sont disposées dans la partie inférieure du bloc déclencheur (14) et que les vis de fixation associées (54) auxdites connexions sont accessibles de la face latérale étroite du côté des bornes de sortie (18).5. Circuit breaker according to claim 1, 2, 3 or 4, with trip unit (14) forming one of the narrow side faces of the circuit breaker and carrying the output terminals (18) of the power conductors (36) which extend parallel to the base (16), characterized in that said disconnectable connections (42) are arranged in the lower part of the trigger block (14) and that the fixing screws associated (54) with said connections are accessible from the narrow side face from the side output terminals (18). 6. Disjoncteur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'angle formé par les plages de connexion (44) est voisin de 45°.6. Circuit breaker according to any one of the preceding claims, characterized in that the angle formed by the connection pads (44) is close to 45 °. 7. Disjoncteur selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque conducteur de puissance (36) du bloc déclencheur (14) porte à l'une de ses extrémités une première plage de connexion (18) d'une borne de raccordement du disjoncteur et à l'extrémité opposée une plage de connexion (48) audit bloc disjoncteur (12) située dans un plan oblique par rapport à la première plage (18).7. Circuit breaker according to any one of the preceding claims, characterized in that each power conductor (36) of the trip unit (14) carries at one of its ends a first connection pad (18) of a terminal connection of the circuit breaker and at the opposite end a connection pad (48) to said circuit breaker block (12) situated in an oblique plane with respect to the first pad (18). 8. Disjoncteur selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'il comporte un cache-borne (22) coiffant à la fois les bornes de raccordement (18) du disjoncteur et les vis de connexion (54) du bloc déclencheur (14) au bloc disjoncteur (12).8. Circuit breaker according to any one of the preceding claims, characterized in that it comprises a terminal cover (22) covering both the connection terminals (18) of the circuit breaker and the connection screws (54) of the block trip unit (14) at the circuit breaker unit (12). 9 . Disjoncteur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une bilame (38) est accolée à un chauffeur appartenant au conducteur de puissance (36) dans le bloc déclencheur (14).9. Circuit breaker according to any one of the preceding claims, characterized in that a bimetallic strip (38) is attached to a driver belonging to the power conductor (36) in the trip unit (14).
EP82401699A 1981-10-05 1982-09-20 Multipole circuit breaker with removable trip unit Expired EP0076719B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8118840A FR2514195A1 (en) 1981-10-05 1981-10-05 MULTIPOLAR CIRCUIT BREAKER WITH REMOVABLE TRIGGER BLOCK
FR8118840 1981-10-05

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Publication Number Publication Date
EP0076719A1 true EP0076719A1 (en) 1983-04-13
EP0076719B1 EP0076719B1 (en) 1985-04-10

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EP82401699A Expired EP0076719B1 (en) 1981-10-05 1982-09-20 Multipole circuit breaker with removable trip unit

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US (1) US4468645A (en)
EP (1) EP0076719B1 (en)
JP (2) JPS58135542A (en)
CA (1) CA1169451A (en)
DE (1) DE3263008D1 (en)
ES (1) ES8306424A1 (en)
FR (1) FR2514195A1 (en)

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CH319019A (en) * 1954-05-12 1957-01-31 Sprecher & Schuh Ag Motor protection switch
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WO2001013398A1 (en) * 1999-08-18 2001-02-22 Eaton Corporation Circuit breaker with easily installed removable trip unit

Also Published As

Publication number Publication date
JPH0126026Y2 (en) 1989-08-03
US4468645A (en) 1984-08-28
ES516082A0 (en) 1983-06-01
JPS58135542A (en) 1983-08-12
FR2514195B1 (en) 1983-11-18
ES8306424A1 (en) 1983-06-01
JPS63176252U (en) 1988-11-15
DE3263008D1 (en) 1985-05-15
EP0076719B1 (en) 1985-04-10
FR2514195A1 (en) 1983-04-08
CA1169451A (en) 1984-06-19

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