EP0564379B1 - Swinging lever actuating mechanism for circuit breaker with phase- and neutral conductor - Google Patents

Swinging lever actuating mechanism for circuit breaker with phase- and neutral conductor Download PDF

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Publication number
EP0564379B1
EP0564379B1 EP19930420138 EP93420138A EP0564379B1 EP 0564379 B1 EP0564379 B1 EP 0564379B1 EP 19930420138 EP19930420138 EP 19930420138 EP 93420138 A EP93420138 A EP 93420138A EP 0564379 B1 EP0564379 B1 EP 0564379B1
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EP
European Patent Office
Prior art keywords
contact
spring
phase
needle
neutral
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
EP19930420138
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German (de)
French (fr)
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EP0564379A1 (en
Inventor
Michel Lazareth
Noel Le Corre
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Schneider Electric SE
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Schneider Electric SE
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Publication of EP0564379B1 publication Critical patent/EP0564379B1/en
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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
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • Such a control mechanism is known, for example, from document EP-A-0 042 778.
  • the contact pressure in the closed position of the contacts is generally provided by two springs offset transversely from one another.
  • Each spring is associated with a contact carrier to individually exert a pressing force on the corresponding contacts.
  • the incorporation of two contact pressure springs inside a common housing of width 18mm poses a problem of space for the implementation of the mechanism.
  • the object of the invention is to provide a simplified control mechanism adapted to the size of a phase and neutral circuit breaker with a common housing.
  • the mechanism according to the invention is characterized in that the elastic means comprise a single spring inserted between the two contact carriers and anchored between a stud of the plate, and a balancing needle of a spreader device, said needle s 'extending transversely to the line of action of the spring, being housed in two opposite cavities of the juxtaposed contact carriers.
  • the two neutral and phase contact carriers made of insulating material are mounted with clearance on the pivot.
  • the contact pressure spring can be formed by a tension spring extending in the median plane of symmetry of the housing.
  • At least one needle support cavity has a first portion arranged in a bearing with radial orientation of the pressure force exerted by the spring and a second portion shaped in articulation allowing adjustment of the position of the needle in case of uneven wear of the phase and neutral contacts.
  • the specific shape of the cavities in the contact carriers allows the industrial mounting of the mechanism to be reconciled with the mechanical operation of the lifter, regardless of wear or manufacturing tolerances of the phase and neutral contacts.
  • a mechanism 10 for controlling a miniature phase and neutral electric circuit breaker is housed in the internal compartment of an insulating casing 12 molded in a narrow and flat parallelepiped shape.
  • the mechanism 10 is actuated either by manual action of a lever 11 pivotally mounted between a closing position and an open position of the circuit breaker contacts, or by an automatic action of a tripping device.
  • the circuit breaker comprises a double switch member, having a movable neutral contact 14 cooperating with a fixed neutral contact 15, and a movable phase contact 16 cooperating with a fixed phase contact 17.
  • the tripping device comprises an electromagnetic trip device 13 ( FIGS. 1 and 3) sensitive to a short-circuit current, and a bimetal thermal trip device 19 (FIG. 6) sensitive to an overload current.
  • the two movable contacts 14, 16 are supported individually by two neutral and phase contact carriers 18, 20 of insulating material, mounted with radial clearance on a pivot 22 of a common drive plate 24.
  • the pivot 22 is positioned in the transverse direction in bearings 26,28 aligned and formed in the opposite walls of the housing 12, to allow a limited rotational movement of the plate 24 between the stable open position and the stable closed position contacts 14.15; 16.17.
  • the rotary plate 24 is disposed between the two contact carriers 18,20 and is fitted with drive stops (one of which is visible in FIG. 1), intended to come into engagement with the edges of the contact carriers 18,20 during opening and closing movements.
  • a trigger lever 32 articulated on a first axis 34 of the plate 24 comprises a control member 36 cooperating with the trigger device 13,19, and a retaining member 38 cooperating with a hook 40 to form a mechanical connection 41 transmission.
  • the hook 40 is pivotally mounted on a second axis 42 of the plate 24, and is mechanically connected to the lever 11 by a metal connecting bracket 44 constituting a toggle device.
  • the operation of the mechanical link 41 for triggering the mechanism 10 is described in detail in French patent 2,616,583 of the applicant.
  • the mechanical link 41 is normally in the locked position by cooperation of the retaining member 38 with the hook 40.
  • Manual actuation of the lever 11 in a given direction then causes the drive of the plate 24 either towards the closed position, or towards the open position of the contacts 14,15; 16.17.
  • the rotary plate 24 ensures the arming of a torsion type opening spring (not shown) anchored between the plate 24 and a stop of the housing on the side opposite to the connecting bracket 44.
  • the automatic triggering of the mechanism 10 is effected by unlocking the retaining member 38 with the hook 40 following the action of one of the triggers 13.19 causing the pivoting of the trigger lever 32 in the direction counterclockwise. This passage to the triggered position creates a break in the mechanical connection 41, followed by a relaxation of the opening spring generating the pivoting in the same direction of the plate 24 and of the contact carriers 18, 20 for the separation of the contacts 14, 15; 16.17.
  • the mechanical link 41 for resetting to the locked position is reset automatically in the open position by means of a return spring 46 (see FIG. 6), formed by an elastic tongue secured to the release lever 32.
  • the external lateral space requirement between the large opposite lateral faces of the housing 12 corresponds to a width of eighteen millimeters.
  • the two respective axes 34, 42 of the trigger lever 32 and of the hook 40 are offset on the plate 24 relative to the pivot 22.
  • the contact pressure function of the two movable neutral 14 and phase 16 contacts on the corresponding fixed contacts 15, 17 is ensured by a single tension spring 48 associated with a spreader device 50.
  • the spring tensile 48 is located substantially in the median plane of trace symmetry 52, and is inserted between the two upper arms 54,56 of the contact carriers 18,20.
  • the upper end of the spring 48 is hooked to a stud 68 of the rotary plate 24, and the pivot 22 of this rear which also serves as an axis of articulation of the contact carriers 18, 20, is located between the needle 58 and the stud 68.
  • the mounting of the insulating contact carriers 18.20 on the pivot 22 on either side of the plate 24 allows a relative pivoting movement relative to the plate 24 to ensure the contact pressure in the closed position.
  • the moment of the torque exerted by the tension spring 48 tends to urge the contact carriers 18,20 clockwise around the pivot 22, and the lifter device 50 ensures a balancing of the pressure forces on the two movable contacts of the neutral 14 and phase 16.
  • the width of the protrusions 64,66 is greater than that of the upper arms 54,56, and the diameter of the tension spring 48 corresponds substantially to the maximum thickness of the plate 24.
  • the small transverse spacing between the two protrusions 64,66 of two contact holders 18,20 allows the lower end of the spring 48 to be hooked onto the needle 58.
  • Each cavity 60,62 of the support of the needle 58 of the lifter device 50 comprises two opposite bearing surfaces 70,72 in the form of circular sectors separated from one another by two tapered recesses 74,76 (FIG. 5 ).
  • the internal diameter between the two bearing surfaces 70,72 corresponds substantially to the diameter of the cylindrical needle 58.
  • the angular positioning of the two bearing surfaces 70,72 in the cavity 60 is chosen such that the diametrical bisector plane extends substantially in a direction parallel to the line of action of the tension spring 48.
  • the bearing surface 72 upper part of each cavity 60, 62 serves as a bearing for each end of the needle 58, the pressure force exerted by the spring 48 being oriented radially towards the circular sector of the bearing surface 72.
  • the needle 58 of the lifter device 50 is first introduced into the cavity 60 of the neutral contact carrier 18, followed by the attachment of the tension spring 48 to the stud 68 of the plate 24, and on the central part of the needle 58.
  • the depth of insertion of the needle 58 into the cavity 60 of the protrusion 64, and the reaction of the pressure force of the spring 48 on the surface of support 72 maintain the transverse positioning of the needle 58 and spring 48 assembly before mounting the phase contact carrier 20.
  • the specific shape of the two cavities 60, 62 makes it possible to reconcile the industrial mounting of the mechanism 10 with the mechanical operation of the lifter device 50 independently of the uneven wear or of the dispersion of the phase and neutral contacts.
  • the use of a single contact pressure spring, arranged in the thickness of the plate 24, makes it possible to obtain a reduced bulk of the mechanism 10.
  • the cavity 62 of the phase contact carrier 20 can be arranged in a circular bearing.
  • the bimetallic strip 19 of the thermal trip device cooperates during deflection with a drawer 80 for actuation secured to the trip lever 32.
  • the drawer 80 is produced by cutting a metal part with a flat surface , in particular a thin sheet, having at one end a substantially circular orifice 82 for fixing, intended to be introduced by clipping onto a fixed lug 84 coming from molding with the trigger lever 32 made of insulating material.
  • Opposite orifice 82 is a hook 86 against which the bimetallic strip 19 engages when it deflects to the right (FIG. 6).
  • the lug 84 of articulation of the drawer 80 is located on the control member 36 of the trigger lever 32 between the first axis 34 and the lower end cooperating with the striker of the magnetic trigger 13.
  • the contact area of the bimetallic strip 19 with the actuating slide 80 is limited to the section of the internal edge of the hook 86. This results in a low coefficient of friction, with maximum efficiency of the thermal trip device.
  • the thermal actuator slide 80 is located in the median plane of symmetry 52 of the contact carriers 18,20, like the striker of the magnetic trigger 13.
  • the thermal trigger force transmitted by the bimetallic strip 19 to the drawer 80 remains concentrated in the median plane 52.
  • the clipping of the orifice 82 on the lug 84 of the trigger lever 32 eliminates any interference or antagonistic friction of the drawer 80 with other organs of the mechanism 10.
  • the thermal triggering force coming from the bimetallic strip 19 is thus reduced to the minimum to cause tripping in the event of the occurrence of an overload current.
  • the insertion of the actuating drawer 80 on the lug 84 can be carried out automatically when the mechanism 10 is assembled.
  • the lug 84 has two parallel elastic legs 88,90 separated from one another by a central slot 92, allowing the tabs to be brought closer when the drawer 80 is clipped in.
  • the elasticity of the tabs 88.90 causes the drawer 80 to be waterproof mounted on the lever trigger 32 thanks to the presence of locking steps at the ends of the legs.
  • the slide 80 is articulated with a slight radial clearance on the lug 84, allowing a free rotational movement relative to the trigger lever 32.

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Description

L'invention est relative à un mécanisme de commande d'un disjoncteur électrique miniature à phase et neutre, ayant:

  • un organe interrupteur double comprenant un contact mobile de neutre supporté par un porte contact de neutre pour coopérer avec un contact fixe de neutre et un contact mobile de phase supporté par un porte contact de phase pour coopérer avec un contact fixe de phase ,
  • une platine rotative d'entraînement simultané des deux porte-contacts entre une position d'ouverture et une position de fermeture des contacts, lesdits porte-contacts étant montés sur un pivot pour autoriser un mouvement relatif de pivotement par rapport à la platine,
  • une manette d'actionnement accouplée à une liaison mécanique de transmission associée à la platine,
  • un levier de déclenchement piloté par un déclencheur pour interrompre la liaison mécanique lors d'un défaut, entraînant l'ouverture automatique des contacts,
  • et des moyens élastiques pour assurer la pression de contact lors du déplacement de la platine vers la position de fermeture sous l'action manuelle de la manette .
The invention relates to a control mechanism for a miniature phase and neutral electric circuit breaker, having:
  • a double switch member comprising a movable neutral contact supported by a neutral contact holder to cooperate with a fixed neutral contact and a movable phase contact supported by a phase contact holder to cooperate with a fixed phase contact,
  • a rotary plate for simultaneously driving the two contact carriers between an open position and a closed position for the contacts, said contact carriers being mounted on a pivot to allow a relative pivoting movement relative to the plate,
  • an actuating lever coupled to a mechanical transmission link associated with the plate,
  • a trip lever controlled by a trip device to interrupt the mechanical connection in the event of a fault, causing the contacts to open automatically,
  • and elastic means for ensuring the contact pressure during the displacement of the plate towards the closed position under the manual action of the lever.

Un tel mécanisme de commande est connu, par exemple, du document EP-A-0 042 778.Such a control mechanism is known, for example, from document EP-A-0 042 778.

Dans un disjoncteur unipolaire et neutre, la pression de contact en position de fermeture des contacts est généralement assurée par deux ressorts décalés transversalement l'un de l'autre. Chaque ressort est associé à un porte-contact pour exercer individuellement une force de pression sur les contacts correspondants. L'incorporation de deux ressorts de pression de contact à l'intérieur d'un boîtier commun de largeur 18mm pose un problème d'encombrement pour la mise en oeuvre du mécanisme.In a single-pole neutral circuit breaker, the contact pressure in the closed position of the contacts is generally provided by two springs offset transversely from one another. Each spring is associated with a contact carrier to individually exert a pressing force on the corresponding contacts. The incorporation of two contact pressure springs inside a common housing of width 18mm poses a problem of space for the implementation of the mechanism.

L'objet de l'invention consiste à réaliser un mécanisme de commande simplifié adapté à l'encombrement d'un disjoncteur phase et neutre à boîtier commun.The object of the invention is to provide a simplified control mechanism adapted to the size of a phase and neutral circuit breaker with a common housing.

Le mécanisme selon l'invention est caractérisé en ce que les moyens élastiques comportent un ressort unique inséré entre les deux porte-contacts et ancré entre un téton de la platine , et une aiguille d'équilibrage d'un dispositif à palonnier, ladite aiguille s'étendant transversalement à la ligne d'action du ressort, en étant logée dans deux cavités opposées des porte-contacts juxtaposés.The mechanism according to the invention is characterized in that the elastic means comprise a single spring inserted between the two contact carriers and anchored between a stud of the plate, and a balancing needle of a spreader device, said needle s 'extending transversely to the line of action of the spring, being housed in two opposite cavities of the juxtaposed contact carriers.

L'usage d'un ressort unique pour la double pression de contact permet de réduire l'encombrement transversal du mécanisme. La coopération du ressort avec le palonnier engendre un équilibrage des efforts de pression sur les deux contacts de phase et de neutre.The use of a single spring for the double contact pressure makes it possible to reduce the transverse size of the mechanism. The cooperation of the spring with the spreader generates a balancing of the pressure forces on the two phase and neutral contacts.

Selon un mode de réalisation préférée les deux porte-contacts de neutre et de phase en matériau isolant sont montés avec jeu sur le pivot.According to a preferred embodiment, the two neutral and phase contact carriers made of insulating material are mounted with clearance on the pivot.

Le ressort de pression de contact peut être formé par un ressort de traction s'étendant dans le plan médian de symétrie du boîtier.The contact pressure spring can be formed by a tension spring extending in the median plane of symmetry of the housing.

Il est avantageux qu'au moins une cavité de support de l'aiguille comporte une première portion agencée en palier avec orientation radiale de la force de pression exercée par le ressort et une deuxième portion conformée en articulation autorisant un ajustage de la position de l'aiguille en cas d'usure inégale des contacts de phase et de neutre .It is advantageous that at least one needle support cavity has a first portion arranged in a bearing with radial orientation of the pressure force exerted by the spring and a second portion shaped in articulation allowing adjustment of the position of the needle in case of uneven wear of the phase and neutral contacts.

La forme spécifique des cavités dans les porte-contacts permet de concilier le montage industriel du mécanisme, avec le fonctionnement mécanique du palonnier, indépendamment de l'usure ou des tolérances de fabrication des contacts de phase et de neutre.The specific shape of the cavities in the contact carriers allows the industrial mounting of the mechanism to be reconciled with the mechanical operation of the lifter, regardless of wear or manufacturing tolerances of the phase and neutral contacts.

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, et représenté aux dessins annexés, dans lesquels:

  • la figure 1 est une vue en élévation du mécanisme de commande d'un disjoncteur à phase et neutre selon un mode de réalisation de l'invention, les contacts étant représentés en position de fermeture;
  • la figure 2 montre une vue en coupe selon la ligne 2-2 de la figure 1;
  • la figure 3 est une vue en coupe selon la ligne 3-3 de la figure 1;
  • la figure 4 montre une vue partielle en perspective du mécanisme de la figure 1, le ressort de pression de contact, et le porte-contact de phase n'étant pas représentés;
  • la figure 5 est une vue de détail, à échelle agrandie d'une cavité de l'aiguille de palonnier;
  • la figure 6 est une autre vue en perspective du mécanisme;
  • la figure 7 est une vue en coupe selon la ligne 7-7 de la figure 1.
Other advantages and characteristics will emerge more clearly from the description which follows, of an embodiment of the invention given by way of example, and represented in the appended drawings, in which:
  • Figure 1 is an elevational view of the control mechanism of a phase and neutral circuit breaker according to an embodiment of the invention, the contacts being shown in the closed position;
  • Figure 2 shows a sectional view along line 2-2 of Figure 1;
  • Figure 3 is a sectional view along line 3-3 of Figure 1;
  • Figure 4 shows a partial perspective view of the mechanism of Figure 1, the contact pressure spring, and the phase contact carrier not being shown;
  • Figure 5 is a detail view, on an enlarged scale of a cavity of the lifter needle;
  • Figure 6 is another perspective view of the mechanism;
  • Figure 7 is a sectional view along line 7-7 of Figure 1.

Sur les figures 1 à 6, un mécanisme 10 de commande d'un disjoncteur électrique miniature à phase et neutre est logé dans le compartiment interne d'un boîtier 12 isolant moulé de forme parallélépipédique étroit et plat. L'actionnement du mécanisme 10 s'effectue soit par une action manuelle d'une manette 11 montée à basculement entre une positon de fermeture et une position d'ouverture des contacts du disjoncteur, soit par une action automatique d'un dispositif de déclenchement. Le disjoncteur comporte un organe interrupteur double, ayant un contact mobile de neutre 14 coopérant avec un contact fixe de neutre 15, et un contact mobile de phase 16 coopérant avec un contact fixe de phase 17. Le dispositif de déclenchement comporte un déclencheur électromagnétique 13 (figure 1 et 3) sensible à un courant de court-circuit, et un déclencheur thermique à bilame 19 (figure 6) sensible à un courant de surcharge.In FIGS. 1 to 6, a mechanism 10 for controlling a miniature phase and neutral electric circuit breaker is housed in the internal compartment of an insulating casing 12 molded in a narrow and flat parallelepiped shape. The mechanism 10 is actuated either by manual action of a lever 11 pivotally mounted between a closing position and an open position of the circuit breaker contacts, or by an automatic action of a tripping device. The circuit breaker comprises a double switch member, having a movable neutral contact 14 cooperating with a fixed neutral contact 15, and a movable phase contact 16 cooperating with a fixed phase contact 17. The tripping device comprises an electromagnetic trip device 13 ( FIGS. 1 and 3) sensitive to a short-circuit current, and a bimetal thermal trip device 19 (FIG. 6) sensitive to an overload current.

Les deux contacts mobiles 14,16 sont supportés individuellement par deux porte-contacts de neutre et de phase 18,20 en matériau isolant, montés avec un jeu radial sur un pivot 22 d'une platine 24 d'entraînement commune. Le pivot 22 est positionné selon le sens transversal dans des paliers 26,28 alignés et ménagés dans les parois opposées du boîtier 12, pour autoriser un mouvement de rotation limité de la platine 24 entre la position stable d'ouverture et le position stable de fermeture des contacts 14,15; 16,17.The two movable contacts 14, 16 are supported individually by two neutral and phase contact carriers 18, 20 of insulating material, mounted with radial clearance on a pivot 22 of a common drive plate 24. The pivot 22 is positioned in the transverse direction in bearings 26,28 aligned and formed in the opposite walls of the housing 12, to allow a limited rotational movement of the plate 24 between the stable open position and the stable closed position contacts 14.15; 16.17.

La platine 24 rotative est disposée entre les deux porte-contacts 18,20 et est équipée de butées d'entraînement (dont une 30 est visible sur la figure 1), destinées à venir en engagement avec les chants des porte-contacts 18,20 lors des mouvements d'ouverture et de fermeture.The rotary plate 24 is disposed between the two contact carriers 18,20 and is fitted with drive stops (one of which is visible in FIG. 1), intended to come into engagement with the edges of the contact carriers 18,20 during opening and closing movements.

Un levier de déclenchement 32 articulé sur un premier axe 34 de la platine 24 comporte un organe de commande 36 coopérant avec le dispositif de déclenchement 13,19, et un organe de retenue 38 coopérant avec un crochet d'accrochage 40 pour former une liaison mécanique 41 de transmission. Le crochet d'accrochage 40 est monté à pivotement sur un deuxième axe 42 de la platine 24, et est relié mécaniquement à la manette 11 par un étrier de liaison 44 métallique constituant un dispositif à genouillère. Le fonctionnement de la liaison mécanique 41 de déclenchement du mécanisme 10 est décrit en détail dans le brevet français 2.616.583 de la demanderesse. La liaison mécanique 41 se trouve normalement en position de verrouillage par coopération de l'organe de retenue 38 avec le crochet d'accrochage 40. L'actionnement manuel de la manette 11 dans un sens donné provoque alors l'entraînement de la platine 24 soit vers la position de fermeture, soit vers la position d'ouverture des contacts 14,15; 16,17. Au cours de la fermeture, la platine 24 rotative assure l'armement d'un ressort d'ouverture du type à torsion (non représenté) ancré entre la platine 24 et une butée du boîtier du côté opposé à l'étrier de liaison 44.A trigger lever 32 articulated on a first axis 34 of the plate 24 comprises a control member 36 cooperating with the trigger device 13,19, and a retaining member 38 cooperating with a hook 40 to form a mechanical connection 41 transmission. The hook 40 is pivotally mounted on a second axis 42 of the plate 24, and is mechanically connected to the lever 11 by a metal connecting bracket 44 constituting a toggle device. The operation of the mechanical link 41 for triggering the mechanism 10 is described in detail in French patent 2,616,583 of the applicant. The mechanical link 41 is normally in the locked position by cooperation of the retaining member 38 with the hook 40. Manual actuation of the lever 11 in a given direction then causes the drive of the plate 24 either towards the closed position, or towards the open position of the contacts 14,15; 16.17. During the closing, the rotary plate 24 ensures the arming of a torsion type opening spring (not shown) anchored between the plate 24 and a stop of the housing on the side opposite to the connecting bracket 44.

Le déclenchement automatique du mécanisme 10 s'effectue par déverrouillage de l'organe de retenue 38 avec le crochet d'accrochage 40 suite à l'action de l'un des déclencheurs 13,19 provoquant le pivotement du levier de déclenchement 32 dans le sens inverse des aiguilles d'une montre. Ce passage vers la position déclenchée crée une rupture de la liaison mécanique 41, suivie d'une détente du ressort d'ouverture engendrant le pivotement de même sens de la platine 24 et des porte-contacts 18,20 pour la séparation des contacts 14,15; 16,17.The automatic triggering of the mechanism 10 is effected by unlocking the retaining member 38 with the hook 40 following the action of one of the triggers 13.19 causing the pivoting of the trigger lever 32 in the direction counterclockwise. This passage to the triggered position creates a break in the mechanical connection 41, followed by a relaxation of the opening spring generating the pivoting in the same direction of the plate 24 and of the contact carriers 18, 20 for the separation of the contacts 14, 15; 16.17.

Le réarmement de la liaison mécanique 41 de déclenchement vers la position verrouillée s'effectue automatiquement en position d'ouverture au moyen d'un ressort de rappel 46 (voir figure 6), formé par une languette élastique solidaire du levier de déclenchement 32.The mechanical link 41 for resetting to the locked position is reset automatically in the open position by means of a return spring 46 (see FIG. 6), formed by an elastic tongue secured to the release lever 32.

L'encombrement latéral externe entre les grandes faces latérales opposées du boîtier 12 correspond à une largeur de dix huit millimètres. Les deux axes 34,42 respectifs du levier de déclenchement 32, et du crochet d'accrochage 40 sont décalés sur la platine 24 par rapport au pivot 22.The external lateral space requirement between the large opposite lateral faces of the housing 12 corresponds to a width of eighteen millimeters. The two respective axes 34, 42 of the trigger lever 32 and of the hook 40 are offset on the plate 24 relative to the pivot 22.

En position de fermeture, la fonction de pression de contact des deux contacts mobiles de neutre 14 et de phase 16 sur les contacts fixes 15,17 correspondants, est assurée par un seul ressort de traction 48 associé à un dispositif à palonnier 50. Le ressort de traction 48 se trouve sensiblement dans le plan médian de symétrie de trace 52, et est inséré entre les deux bras 54,56 supérieurs des porte-contacts 18,20.In the closed position, the contact pressure function of the two movable neutral 14 and phase 16 contacts on the corresponding fixed contacts 15, 17 is ensured by a single tension spring 48 associated with a spreader device 50. The spring tensile 48 is located substantially in the median plane of trace symmetry 52, and is inserted between the two upper arms 54,56 of the contact carriers 18,20.

L'extrémité supérieure du ressort 48 est accrochée à un téton 68 de la platine 24 rotative, et le pivot 22 de cette derrière qui sert également d'axe d'articulation des porte-contacts 18,20, est situé entre l'aiguille 58 et le téton 68. Le montage à jeu. des porte-contacts 18,20 isolants sur le pivot 22 de part et d'autre de la platine 24 autorise un mouvement relatif de pivotement par rapport à la platine 24 pour assurer la pression de contact en position de fermeture. Le moment du couple exercé par le ressort de traction 48 tend à solliciter les porte-contacts 18,20 dans le sens horaire autour du pivot 22, et le dispositif à palonnier 50 assure un équilibrage des efforts de pression sur les deux contacts mobiles du neutre 14 et de phase 16.The upper end of the spring 48 is hooked to a stud 68 of the rotary plate 24, and the pivot 22 of this rear which also serves as an axis of articulation of the contact carriers 18, 20, is located between the needle 58 and the stud 68. The mounting of the insulating contact carriers 18.20 on the pivot 22 on either side of the plate 24 allows a relative pivoting movement relative to the plate 24 to ensure the contact pressure in the closed position. The moment of the torque exerted by the tension spring 48 tends to urge the contact carriers 18,20 clockwise around the pivot 22, and the lifter device 50 ensures a balancing of the pressure forces on the two movable contacts of the neutral 14 and phase 16.

La largeur des protubérances 64,66 est supérieure à celle des bras supérieurs 54,56, et le diamètre du ressort de traction 48 correspond sensiblement à l'épaisseur maximum de la platine 24. Le faible écartement transversal entre les deux protubérances 64,66 des deux porte-contacts 18,20 permet l'accrochage de l'extrémité inférieure du ressort 48 sur l'aiguille 58.The width of the protrusions 64,66 is greater than that of the upper arms 54,56, and the diameter of the tension spring 48 corresponds substantially to the maximum thickness of the plate 24. The small transverse spacing between the two protrusions 64,66 of two contact holders 18,20 allows the lower end of the spring 48 to be hooked onto the needle 58.

Chaque cavité 60,62 du support de l'aiguille 58 du dispositif à palonnier 50 comporte deux surfaces d'appui 70,72 opposées en forme de secteurs circulaires séparées l'une de l'autre par deux évidements 74,76 tronconiques (figure 5). Le diamètre interne entre les deux surfaces d'appui 70,72 correspond sensiblement au diamètre de l'aiguille 58 cylindrique. Le positionnement angulaire des deux surfaces d'appui 70,72 dans la cavité 60 est choisi tel que le plan bissecteur diamétral s'étende sensiblement selon une direction parallèle à la ligne d'action du ressort de traction 48. La surface d'appui 72 supérieure de chaque cavité 60,62 sert de palier pour chaque extrémité de l'aiguille 58, la force de pression exercée par le ressort 48 étant orientée radialement vers le secteur circulaire de la surface d'appui 72.Each cavity 60,62 of the support of the needle 58 of the lifter device 50 comprises two opposite bearing surfaces 70,72 in the form of circular sectors separated from one another by two tapered recesses 74,76 (FIG. 5 ). The internal diameter between the two bearing surfaces 70,72 corresponds substantially to the diameter of the cylindrical needle 58. The angular positioning of the two bearing surfaces 70,72 in the cavity 60 is chosen such that the diametrical bisector plane extends substantially in a direction parallel to the line of action of the tension spring 48. The bearing surface 72 upper part of each cavity 60, 62 serves as a bearing for each end of the needle 58, the pressure force exerted by the spring 48 being oriented radially towards the circular sector of the bearing surface 72.

La présence des deux évidements 74,76 tronconiques (figures 3 et 5) orientés dans le sens de débattement des porte-contacts 18,20, autorise un déplacement relatif de l'aiguille 58 pour garantir l'équilibrage des forces de pression suite à une usure inégale des contacts de phase 16,17 et de neutre 14,15.The presence of the two tapered recesses 74, 76 (FIGS. 3 and 5) oriented in the direction of travel of the contact carriers 18, 20 allows relative movement of the needle 58 to guarantee the balancing of the pressure forces following a uneven wear of phase contacts 16,17 and neutral 14,15.

Lors du montage industriel en automatique du disjoncteur, l'aiguille 58 du dispositif à palonnier 50 est d'abord introduite dans la cavité 60 du porte-contact de neutre 18, suivi de l'accrochage du ressort de traction 48 sur le téton 68 de la platine 24, et sur la partie centrale de l'aiguille 58. La profondeur d'enfoncement de l'aiguille 58 dans la cavité 60 de la protubérance 64, et la réaction de la force de pression du ressort 48 sur la surface d'appui 72 maintiennent le positionnement transversal de l'ensemble aiguille 58 et ressort 48 avant le montage du porte-contact de phase 20.During the automatic industrial mounting of the circuit breaker, the needle 58 of the lifter device 50 is first introduced into the cavity 60 of the neutral contact carrier 18, followed by the attachment of the tension spring 48 to the stud 68 of the plate 24, and on the central part of the needle 58. The depth of insertion of the needle 58 into the cavity 60 of the protrusion 64, and the reaction of the pressure force of the spring 48 on the surface of support 72 maintain the transverse positioning of the needle 58 and spring 48 assembly before mounting the phase contact carrier 20.

La forme spécifique des deux cavités 60,62 permet de concilier le montage industriel du mécanisme 10 avec le fonctionnement mécanique du dispositif à palonnier 50 indépendamment de l'usure inégale ou de la dispersion des contacts de phase et de neutre. L'usage d'un ressort unique de pression de contact, agencé dans l'épaisseur de la platine 24, permet d'obtenir un encombrement réduit du mécanisme 10.The specific shape of the two cavities 60, 62 makes it possible to reconcile the industrial mounting of the mechanism 10 with the mechanical operation of the lifter device 50 independently of the uneven wear or of the dispersion of the phase and neutral contacts. The use of a single contact pressure spring, arranged in the thickness of the plate 24, makes it possible to obtain a reduced bulk of the mechanism 10.

Selon une variante, la cavité 62 du porte-contact de phase 20 peut être agencée en palier circulaire.According to a variant, the cavity 62 of the phase contact carrier 20 can be arranged in a circular bearing.

Sur les figures 4 , 6 et 7, la bilame 19 du déclencheur thermique coopère au cours de la déflexion avec un tiroir 80 d'actionnement solidaire du levier de déclenchement 32. Le tiroir 80 est réalisé par découpage d'une pièce métallique à surface plane, notamment une tôle à faible épaisseur, ayant à l'une des extrémités un orifice 82 de fixation sensiblement circulaire, destiné à être introduit par clipsage sur un ergot 84 fixe venant de moulage avec le levier de déclenchement 32 en matériau isolant. A l'opposé de l'orifice 82 se trouve un crochet 86 contre lequel la bilame 19 vient en engagement lors de sa déflexion vers la droite (figure 6).In FIGS. 4, 6 and 7, the bimetallic strip 19 of the thermal trip device cooperates during deflection with a drawer 80 for actuation secured to the trip lever 32. The drawer 80 is produced by cutting a metal part with a flat surface , in particular a thin sheet, having at one end a substantially circular orifice 82 for fixing, intended to be introduced by clipping onto a fixed lug 84 coming from molding with the trigger lever 32 made of insulating material. Opposite orifice 82 is a hook 86 against which the bimetallic strip 19 engages when it deflects to the right (FIG. 6).

L'ergot 84 d'articulation du tiroir 80 se trouve sur l'organe de commande 36 du levier de déclenchement 32 entre le premier axe 34 et l'extrémité inférieure coopérant avec le percuteur du déclencheur magnétique 13. La zone de contact de la bilame 19 avec le tiroir 80 d'actionnement est limitée à la section du chant interne du crochet 86. Il en résulte un faible coefficient de frottement, avec un rendement maximum du déclencheur thermique.The lug 84 of articulation of the drawer 80 is located on the control member 36 of the trigger lever 32 between the first axis 34 and the lower end cooperating with the striker of the magnetic trigger 13. The contact area of the bimetallic strip 19 with the actuating slide 80 is limited to the section of the internal edge of the hook 86. This results in a low coefficient of friction, with maximum efficiency of the thermal trip device.

Le tiroir 80 d'actionnement du déclencheur thermique est situé dans le plan médian de symétrie 52 des porte-contacts 18,20, tout comme le percuteur du déclencheur magnétique 13. L'effort de déclenchement thermique transmis par la bilame 19 au tiroir 80 reste concentré dans le plan médian 52. Le clipsage de l'orifice 82 sur l'ergot 84 du levier de déclenchement 32 supprime toutes interférences ou frottements antagonistes du tiroir 80 avec d'autres organes du mécanisme 10. La force de déclenchement thermique en provenance de la bilame 19 est ainsi réduite au minimum pour provoquer le déclenchement en cas d'apparition d'un courant de surcharge.The thermal actuator slide 80 is located in the median plane of symmetry 52 of the contact carriers 18,20, like the striker of the magnetic trigger 13. The thermal trigger force transmitted by the bimetallic strip 19 to the drawer 80 remains concentrated in the median plane 52. The clipping of the orifice 82 on the lug 84 of the trigger lever 32 eliminates any interference or antagonistic friction of the drawer 80 with other organs of the mechanism 10. The thermal triggering force coming from the bimetallic strip 19 is thus reduced to the minimum to cause tripping in the event of the occurrence of an overload current.

L'insertion du tiroir 80 d'actionnement sur l'ergot 84 peut être réalisée en automatique lors de l'assemblage du mécanisme 10. L'ergot 84 comporte deux pattes 88,90 élastiques parallèles séparées l'une de l'autre par une fente 92 centrale, autorisant le rapprochement des pattes lors du clipsage tiroir 80. Après introduction de l'orifice 82 de fixation sur l'ergot 84, l'élasticité des pattes 88,90 provoque le montage imperméable du tiroir 80, sur le levier de déclenchement 32 grâce à la présence de redans de verrouillage aux extrémités des pattes. Dans cette position, le tiroir 80 est articulé avec un léger jeu radial sur l'ergot 84, autorisant u mouvement de rotation libre par rapport au levier de déclenchement 32.The insertion of the actuating drawer 80 on the lug 84 can be carried out automatically when the mechanism 10 is assembled. The lug 84 has two parallel elastic legs 88,90 separated from one another by a central slot 92, allowing the tabs to be brought closer when the drawer 80 is clipped in. After introduction of the orifice 82 for fixing on the lug 84, the elasticity of the tabs 88.90 causes the drawer 80 to be waterproof mounted on the lever trigger 32 thanks to the presence of locking steps at the ends of the legs. In this position, the slide 80 is articulated with a slight radial clearance on the lug 84, allowing a free rotational movement relative to the trigger lever 32.

En cas de surintensité, la déflexion vers la droite de la bilame 19 entraîne le tiroir 80 en translation dans le même sens, suivi du pivotement du levier de déclenchement 32 autour du premier axe 34 vers la position déclenchée. Il en résulte la brisure de la liaison mécanique 41, et l'ouverture des contacts 14,15; 16,17.In the event of an overcurrent, the deflection to the right of the bimetallic strip 19 drives the slide 80 in translation in the same direction, followed by the pivoting of the trigger lever 32 around the first axis 34 towards the triggered position. This results in the breaking of the mechanical connection 41, and the opening of the contacts 14,15; 16.17.

Claims (7)

  1. An operating mechanism of a miniature phase plus neutral electrical circuit breaker, having :
    - a double switch component comprising a movable neutral contact (14) supported by a neutral contact support (18) to cooperate with a stationary neutral contact (15) and a movable phase contact (16) supported by a phase contact support (20) to cooperate with a stationary phase contact (17),
    - a rotating plate (24) for simultaneous driving of the two contact supports (18, 20) between an open position and a closed position of the contacts (14, 15; 16, 17), said contact supports (18, 20) being mounted on a pivot (22) to allow a relative pivoting movement with respect to the plate (24),
    - an actuating handle (11) coupled to a mechanical transmission link (41) associated with the plate (24),
    - a trip lever (32) controlled by a trip device (13, 19) to interrupt the mechanical link (41) when a fault occurs, leading to automatic opening of the contacts,
    - and flexible means for providing the contact pressure when the plate (24) moves to the closed position due to manual action of the handle (11),
    characterized in that
    the flexible means comprise a single spring (48) inserted between the two contact supports (18, 20) and secured between a stud (68) of the plate (24), and a balancing needle (58) of a rocking lever device (50), said needle (58) extending transversely to the line of action of the spring (48), being housed in two opposite cavities (60, 62) of the juxtaposed contact supports (18, 20).
  2. The operating mechanism according to claim 1, characterized in that the two neutral (18) and phase (20) contact supports, made of insulating material, are mounted with clearance on the pivot (22), and that the contact pressure spring (48) is a tension spring.
  3. The operating mechanism according to claim 1 or 2, characterized in that at least one support cavity (60, 62) of the needle (58) comprises a first portion arranged as a bearing wish radial orientation of the pressure force exerted by the spring (48) and a see and portion shaped as an articulation enabling adjustment of the position of the needle (58) in case of unequal wear of the phase (16, 17) and neutral (14, 15) contacts.
  4. The operating mechanism according to claim 3, characterized in that the first portion of the cavity (60, 62) comprises two diametrically opposed bearing surfaces (70, 72) in the form of circular sectors, separated from one another by two cylindrical recesses (74, 76) oriented in the direction of movement of the two contact supports (18, 20).
  5. The operating mechanism according to one of the claims 2 to 4, characterized in that the two insulating contact supports (18, 20) comprise two upper arms (54, 56) between which the contact pressure spring (48) is arranged, and two protuberances (64, 66) around said cavities (60, 62) housing the needle (58), the depth of each cavity (60, 62) being greater than the diameter of the spring.
  6. The operating mechanism according to claim 5, characterized in that the two protuberances (64, 66) of the contact supports (18, 20) are separated transversely by a small distance enabling the tension spring (48) to be hooked onto the central part of the needle (58), and that said spring (43) extends in the mid-plane of symmetry of the insulating case (12).
  7. The operating mechanism according to one of the claims 1 to 6, characterized in that the articulation pivot (22) of the contact supports (18, 20) is located between the anchoring points of the spring (48) on the stud (68) of the plate (24), and the needle (58), and that the trip lever (32) is mounted with limited pivoting on a first spindle (34) of the plate (24), said first spindle (34) being offset from the pivot (22).
EP19930420138 1992-03-31 1993-03-26 Swinging lever actuating mechanism for circuit breaker with phase- and neutral conductor Expired - Lifetime EP0564379B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9203985 1992-03-31
FR9203985A FR2689308B1 (en) 1992-03-31 1992-03-31 STEERING MECHANISM FOR NEUTRAL PHASE AND NEUTRAL ELECTRIC CIRCUIT BREAKER.

Publications (2)

Publication Number Publication Date
EP0564379A1 EP0564379A1 (en) 1993-10-06
EP0564379B1 true EP0564379B1 (en) 1996-06-12

Family

ID=9428372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930420138 Expired - Lifetime EP0564379B1 (en) 1992-03-31 1993-03-26 Swinging lever actuating mechanism for circuit breaker with phase- and neutral conductor

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EP (1) EP0564379B1 (en)
CN (1) CN1033833C (en)
DE (1) DE69303097T2 (en)
ES (1) ES2090929T3 (en)
FR (1) FR2689308B1 (en)
RU (1) RU2096853C1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100486756C (en) * 2004-11-19 2009-05-13 杨庆来 Die forging production technology for hard copper alloy explosion-proof instrument
DE102006038005B4 (en) * 2006-05-22 2009-04-23 Dehn + Söhne Gmbh + Co. Kg Connection and base part for receiving a pluggable surge arrester
DE102008049507A1 (en) * 2008-09-29 2010-04-01 Ellenberger & Poensgen Gmbh Miniature circuit breaker
ITMI20090009A1 (en) * 2009-01-08 2010-07-09 Abb Spa COMMAND MECHANISM FOR AN INTERRUPTING DEVICE AND DEVICE OF INTERRUPTION INCLUDING SUCH MECHANISM.
CN102136398B (en) * 2010-01-21 2014-08-13 施耐德电器工业公司 Contactor
CN104036978B (en) * 2014-05-13 2016-06-15 宁波舜利高压开关科技有限公司 Single spring contact pressure apparatus of isolation strip earthed switch and actuating method thereof
CN104134588B (en) * 2014-07-17 2016-03-02 正泰集团股份有限公司 A kind of operating means of multipole small-size circuit breaker
CN106158529B (en) * 2015-04-28 2018-10-23 上海电科电器科技有限公司 The operating mechanism of breaker
WO2018039891A1 (en) * 2016-08-30 2018-03-08 赵建平 Circuit breaker cradle
CN106971921B (en) * 2017-04-17 2019-10-01 乐清市沃斯托电气有限公司 Breaker
SI25460B (en) * 2017-06-06 2021-11-30 Nela Razvojni Center Za Elektroindustrijo In Elektroniko, D.O.O. Improved thermomagnetic actuator in a security electric switch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485254A1 (en) * 1980-06-19 1981-12-24 Merlin Gerin MINIATURE UNIPOLAR AND NEUTRAL CIRCUIT BREAKER
FR2616583B1 (en) * 1987-06-09 1995-01-06 Merlin Gerin CONTROL MECHANISM OF A MINIATURE ELECTRIC CIRCUIT BREAKER

Also Published As

Publication number Publication date
CN1077051A (en) 1993-10-06
ES2090929T3 (en) 1996-10-16
DE69303097D1 (en) 1996-07-18
EP0564379A1 (en) 1993-10-06
FR2689308B1 (en) 1994-05-20
CN1033833C (en) 1997-01-15
DE69303097T2 (en) 1997-01-02
RU2096853C1 (en) 1997-11-20
FR2689308A1 (en) 1993-10-01

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