EP1482529A1 - Method of manufacturing of wedges that are positioned between the bimetal and the trigger of a safety switch - Google Patents

Method of manufacturing of wedges that are positioned between the bimetal and the trigger of a safety switch Download PDF

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Publication number
EP1482529A1
EP1482529A1 EP03360068A EP03360068A EP1482529A1 EP 1482529 A1 EP1482529 A1 EP 1482529A1 EP 03360068 A EP03360068 A EP 03360068A EP 03360068 A EP03360068 A EP 03360068A EP 1482529 A1 EP1482529 A1 EP 1482529A1
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EP
European Patent Office
Prior art keywords
trigger
shim
manufacturing
bimetallic strip
bimetallic
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
EP03360068A
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German (de)
French (fr)
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EP1482529B1 (en
Inventor
Etienne Gancel
Francis Deckert
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Hager Electro SAS
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Hager Electro SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hager Electro SAS filed Critical Hager Electro SAS
Priority to EP03360068A priority Critical patent/EP1482529B1/en
Priority to DE60301865T priority patent/DE60301865T2/en
Priority to AT03360068T priority patent/ATE306718T1/en
Priority to SI200330116T priority patent/SI1482529T1/en
Priority to ES03360068T priority patent/ES2248717T3/en
Publication of EP1482529A1 publication Critical patent/EP1482529A1/en
Application granted granted Critical
Publication of EP1482529B1 publication Critical patent/EP1482529B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/22—Means for adjustment of "on" or "off" operating temperature by adjustment of a member transmitting motion from the thermal element to contacts or latch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/01—Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions

Definitions

  • the present invention relates primarily to a method of manufacturing a wedge connecting the bimetal and the trigger of a bimetallic electrical safety device for example circuit breaker type, and the actual shim. Said method allows individualized manufacture of each shim, so that the triggered by the bimetallic strip complies with the standards in force without it is necessary to make any subsequent adjustments.
  • the invention relates to also electrical appliances equipped with such holds.
  • circuit breakers circuit breakers, differential switches, thermostats, ...)
  • the description follows is based on the example of circuit breakers.
  • these electrical appliances are equipped with a mechanical adjustment device accessible from outside the housing or a subassembly of the apparatus, and making it possible to position the bimetal in relation to to the trigger so that triggering occurs for a value current above a certain standard threshold based on the nominal value of the operating current of the device, and in a time interval also standardized.
  • the mechanical adjustment means consist for example of a screw or of an eccentric that are manipulated to modify the prestress applied to the bimetal based on test results.
  • the principle is based on the control of the initial prestressing of bimetallic strip, with a view to respond to any current overload in accordance with the standards in force.
  • the invention overcomes this disadvantage, by proposing in the first place a a process that eliminates the need for adjustment by mechanical movement in the product.
  • the originality of the process of the invention lies in the use of a shim which is systematically planned too big, to end up with a time of very fast trigger.
  • Knowledge of the properties of bimetallic material, and in particular its speed of deflection, allows the calculation of the size of the hold to insert in the device, or more generally a length / distance exploitable by the manufacturing process, from the measurement of the tripping time obtained with the standard hold.
  • the correction distance c V f (t o - t d ).
  • the shim is for example machined in a continuous strip whose displacement axial is obtained via a drive system actuated by the computer for successive advances corresponding to the manufacture of a corrected standard gauge block value c.
  • This process can allow the integration of the manufacture of the bimetal in an industrial process of continuous production of electrical devices.
  • the machining of each individual shim is carried out immediately after measuring the trip duration of the device equipped with the hold standard, and the wedge obtained is then directly implanted in said apparatus, preferably via automated means.
  • the results of the measures of the durations of triggering, and on the other hand calculations of the correction distances can be memorized by the calculator, analyzed statistically in order to build and memorize a curve representing the probability density of the lengths of to manufacture independently of the production line of electrical appliances, a set of wedges obeying said curve.
  • prefabricated shims can then be stored, for example by size, and be selected to be implanted into devices in the process of manufacturing according to measurements made with the gauge block.
  • the selection and extraction of each stored hold can be done automated or manual.
  • the invention also relates secondly to the actual wedge, which connects the bimetal at the trigger lock of a modular electrical appliance of the type circuit breaker, and is manufactured individually for each device according to the described above in order to meet triggering standards without require further adjustments.
  • it is characterized in that it is interposed between the bimetal and the trigger of the lock, if the direction of deflection of the bimetallic strip tends to bring it closer to the said lock. It then acts on two surfaces vis-à-vis respectively bimetal and the shutter release.
  • the active surfaces of the hold are therefore two opposite surfaces of the hold.
  • the invention relates to an electrical safety device with bimetallic type circuit breaker, the bimetallic cooperates with a trigger lock adapted to separating a movable contact from a fixed contact during a current overload, said apparatus being provided with one of the aforementioned wedges.
  • the adjustment time gets economic added value which is further improved by the removal of the adjustment device and that of the flexible support of the bimetallic strip and the spring is associated with it. No need for adjustment from outside the housing makes said flexible support and its spring unnecessary, and the use of a rigid material for the support participates in this additional saving.
  • circuit breaker With reference to FIG. 1, the portion of circuit breaker that is shown has a bimetallic strip (1) cooperating with the trigger (2) of a lock mechanical via a wedge (3) according to the present invention.
  • Said magnetic lock connected to a manual control member (6), can also be triggered by a magnetic trigger assembly which is activated in particular in case short circuit. All these elements, which are not directly the object of the invention are not described in the context of this text.
  • the direction of deflection of the bimetallic strip (1) is shown by the arrow (F), and the active surfaces (4, 5) of the shim (3) are opposite, because the system acts by pushing the trigger (2).
  • the effort developed by the end of the bimetallic strip (1) is applied against the surface (5), then echoed to the trigger (2) via the opposite surface (4).
  • the distance separating the active surfaces (4 and 5) is variable, and calculated individually for each circuit breaker, according to the present invention.
  • Figures 2 and 3 illustrate a variant of wedge shape (3), which obeys however, with the same philosophy as in Figure 1, that is to say that the active surfaces (4 and 5) are opposed, since it is a system that acts also by pushing the trigger (2).
  • Fork configuration particularly visible in Figure 3, allows the implantation of the piece in good conditions for assembly, which can be automated if necessary.
  • One of the arms the fork has a slight concavity (7) intended to allow a clipping the wedge (3) in contact with the periphery of a spring (8).
  • the configuration is in the trigger (2).
  • the wedge (3 ') is substantially U-shaped, and the active surfaces (4 ') and (5') are this time vis-à-vis, and act from outside respectively of the bimetal (1) and (2) of the trigger (2).
  • the distance separating the active surfaces (4 ') and (5') is variable, and calculated individually for each circuit breaker.
  • the shims are continuously produced according to a process shown diagrammatically in FIG.
  • the raw material is for example constituted of a winding of a band (B) a material suitable for making shims, said continuous band (B) being driven and guided to a punching stage where individualization takes place of each hold.
  • the strip (B) is driven via a guide stage (9) towards a punching stage (10) having a punch of form required for the manufacture of individual shims.
  • a punching stage (10) having a punch of form required for the manufacture of individual shims. It should be noted that the hold could equally well be obtained by any other method of machining (milling, laser cutting or water jet).
  • FIG. 6 illustrates well the difference of shapes obtained for cables in function of the difference in length traveled by the band between two successive punching.
  • phase 1 a first cut is made by the punch.
  • the shape of the hold corresponds to that used in Figures 2 and 3.
  • the end fork is embellished with a lateral arm (11) realizing the connection with the free end of the strip (B) not yet machined.
  • said strip (B) is driven by a length I 1 causing cutting in said lateral arm (11) substantially at the fork, that is to say that said arm (11) is almost totally amputated.
  • the computer may also instruct the band to move the band a distance I 2 slightly greater than the previous one, so that almost all of the lateral arm (11) is retained. This is illustrated in phase 2 'of figure 6.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Fuses (AREA)

Abstract

The method involves subjecting an electrical apparatus to an overload current to trigger the apparatus. A triggering duration is measured from the application of the current and is compared to a preset triggering duration. The compared duration is converted into a correction distance by a calculator. The distance is utilized by production lines for manufacturing a spacer of length equal to that of standard spacer block. Independent claims are also included for the following: (a) a spacer for connecting a bimetallic strip and a triggering lock of safety apparatus (b) a safety electrical apparatus with a bimetallic strip.

Description

La présente invention concerne principalement un procédé de fabrication d'une cale reliant la bilame et le déclencheur d'un appareil de sécurité électrique à bilame par exemple de type disjoncteur, ainsi que la cale proprement dite. Ledit procédé permet une fabrication individualisée de chaque cale, de telle sorte que le déclenchement provoqué par la bilame soit conforme aux normes en vigueur sans qu'il soit nécessaire de procéder à aucun réglage ultérieur. L'invention concerne également les appareils électriques équipés de telles cales.The present invention relates primarily to a method of manufacturing a wedge connecting the bimetal and the trigger of a bimetallic electrical safety device for example circuit breaker type, and the actual shim. Said method allows individualized manufacture of each shim, so that the triggered by the bimetallic strip complies with the standards in force without it is necessary to make any subsequent adjustments. The invention relates to also electrical appliances equipped with such holds.

Bien que l'invention soit applicable à tous les dispositifs de sécurité électriques à bilame (disjoncteurs, interrupteurs différentiels, thermostats, ...), la description qui suit est basée sur l'exemple des disjoncteurs.Although the invention is applicable to all electrical safety devices bimetallic devices (circuit breakers, differential switches, thermostats, ...), the description follows is based on the example of circuit breakers.

Actuellement, dans la plupart des cas, ces appareils électriques sont munis d'un dispositif de réglage mécanique accessible depuis l'extérieur du boítier ou d'un sous-ensemble de l'appareil, et permettant de positionner la bilame par rapport au déclencheur de telle sorte que le déclenchement se produise pour une valeur de courant supérieure à un certain seuil normalisé fonction de la valeur nominale du courant de fonctionnement de l'appareil, et dans un intervalle de temps également normalisé.Currently, in most cases, these electrical appliances are equipped with a mechanical adjustment device accessible from outside the housing or a subassembly of the apparatus, and making it possible to position the bimetal in relation to to the trigger so that triggering occurs for a value current above a certain standard threshold based on the nominal value of the operating current of the device, and in a time interval also standardized.

Les moyens de réglage mécaniques sont par exemple constitués d'une vis ou d'un excentrique qui sont manipulés pour modifier la précontrainte appliquée à la bilame en fonction de résultats de tests de fonctionnement. Le principe est donc basé sur le contrôle de la précontrainte initiale de la bilame, en vue de l'amener à répondre à toute surcharge de courant conformément à ce que proposent les normes en vigueur.The mechanical adjustment means consist for example of a screw or of an eccentric that are manipulated to modify the prestress applied to the bimetal based on test results. The principle is based on the control of the initial prestressing of bimetallic strip, with a view to respond to any current overload in accordance with the standards in force.

Plus précisément, celles-ci indiquent par exemple que pour le courant nominal de l'appareil électrique augmenté d'un certain pourcentage (13%) utilisé à titre de coefficient de sécurité, il ne doit se produire aucun déclenchement. Lorsque le courant nominal augmente de 45%, en revanche, il faut que l'appareil déclenche dans tous les cas en moins d'une heure. On conçoit que si le test devait être effectué avec les valeurs nominales de courant, la durée de chacun de ces tests serait incompatible avec le process industriel de fabrication des appareils électriques.More specifically, these indicate for example that for the rated current electric appliance increased by a certain percentage (13%) used as a coefficient of safety, there must be no triggering. When the rated current increases by 45%, however, it is necessary that the device triggers in any case in less than an hour. It is understandable that if the test were to be performed with the nominal current values, the duration of each of these tests would be incompatible with the industrial process of manufacturing electric.

C'est la raison pour laquelle les tests sont en réalité effectués avec des intensités bien supérieures aux valeurs nominales, qui génèrent des temps de déclenchement beaucoup plus brefs. Une correspondance est ensuite établie entre la tolérance temporelle tolérée pour les temps de déclenchement aux valeurs nominales et les résultats à des valeurs d'intensités bien supérieures.That's why the tests are actually done with intensities well above the nominal values, which generate trigger much shorter. A correspondence is then established between the tolerated time tolerance for the tripping times at nominal values and results at much higher intensity values.

L'inconvénient de ce type de réglage est qu'il nécessite des dispositions constructives généralement coûteuses.The disadvantage of this type of adjustment is that it requires generally expensive.

L'invention remédie à cet inconvénient, en proposant en premier lieu un procédé qui s'affranchit de toute nécessité de réglage par mouvement mécanique dans le produit.The invention overcomes this disadvantage, by proposing in the first place a a process that eliminates the need for adjustment by mechanical movement in the product.

Ainsi, à titre principal, l'invention concerne un procédé de fabrication d'une cale reliant la bilame et le déclencheur d'un appareil électrique de sécurité de type disjoncteur, permettant de dimensionner ladite cale à la fabrication de manière à ce que le déclenchement que provoque la bilame soit conforme aux normes en vigueur sans qu'il y ait nécessité de réglage ultérieur, caractérisé en ce que :

  • l'appareil électrique modulaire est muni dans un premier temps d'une cale étalon dont la dimension fixée est sensiblement supérieure, dans la direction de la déflection de la bilame, à l'ordre de grandeur de la cale destinée à équiper l'appareil ;
  • l'appareil est soumis à un courant Is de surcharge apte à le faire déclencher par déplacement de la bilame ;
  • la durée td de déclenchement, à partir de l'application du courant Is, est mesurée ;
  • cette durée td est comparée à une durée de déclenchement prédéterminée to correspondant à un appareil bien réglé, et convertie en une distance c de correction par un calculateur intégré à la chaíne de fabrication des cales
  • ladite distance c est exploitée par cette chaíne pour la fabrication d'une cale individualisée, de longueur égale à celle de la cale étalon corrigée de la valeur c.
Thus, principally, the invention relates to a method of manufacturing a wedge connecting the bimetal and the trigger of a breaker type electrical safety device, for dimensioning said wedge during manufacture so that the triggering that the bimetallic strip is in conformity with the standards in force without there being any need for further adjustment, characterized in that:
  • the modular electrical apparatus is initially provided with a gauge block whose fixed dimension is substantially greater, in the direction of deflection of the bimetallic strip, to the order of magnitude of the shim intended to equip the apparatus;
  • the apparatus is subjected to a current I s of overload capable of causing it to trip by displacement of the bimetallic strip;
  • the duration t d of tripping, from the application of the current I s , is measured;
  • this duration t d is compared with a predetermined tripping time t o corresponding to a well-tuned device, and converted into a correction distance c by a computer integrated in the production line of the holds
  • said distance c is exploited by this chain for the manufacture of an individual shim, equal in length to that of the corrected standard shim value c.

L'originalité du procédé de l'invention réside dans l'emploi d'une cale qui est systématiquement prévue trop grande, pour aboutir à un temps de déclenchement très rapide. La connaissance des propriétés de la bilame, et notamment de sa vitesse de déflection, permet le calcul de la taille de la cale à insérer dans l'appareil, ou plus généralement d'une longueur/distance exploitable par le process de fabrication, à partir de la mesure du temps de déclenchement obtenu avec la cale étalon.The originality of the process of the invention lies in the use of a shim which is systematically planned too big, to end up with a time of very fast trigger. Knowledge of the properties of bimetallic material, and in particular its speed of deflection, allows the calculation of the size of the hold to insert in the device, or more generally a length / distance exploitable by the manufacturing process, from the measurement of the tripping time obtained with the standard hold.

Ainsi, la vitesse Vf de déflection de la bilame étant connue, la distance c de correction est égale à c = Vf (to ― td).Thus, since the deflection speed V f of the bimetallic strip is known, the correction distance c is equal to c = V f (t o - t d ).

La cale est par exemple usinée dans une bande continue dont le déplacement axial est obtenu via un système d'entraínement actionné par le calculateur pour des avances successives correspondant à la fabrication d'une cale étalon corrigée de la valeur c. Ce procédé peut permettre l'intégration de la fabrication de la bilame dans un process industriel de production en continu des appareils électriques. Dans ce cas, l'usinage de chaque cale individualisée est réalisé immédiatement après la mesure de la durée de déclenchement de l'appareil équipé de la cale étalon, et la cale obtenue est ensuite directement implantée dans ledit appareil, de préférence via des moyens automatisés.The shim is for example machined in a continuous strip whose displacement axial is obtained via a drive system actuated by the computer for successive advances corresponding to the manufacture of a corrected standard gauge block value c. This process can allow the integration of the manufacture of the bimetal in an industrial process of continuous production of electrical devices. In this case, the machining of each individual shim is carried out immediately after measuring the trip duration of the device equipped with the hold standard, and the wedge obtained is then directly implanted in said apparatus, preferably via automated means.

Alternativement, les résultats d'une part des mesures des durées de déclenchement, et d'autre part des calculs des distances de correction peuvent être mémorisés par le calculateur, analysés statistiquement en vue de construire et de mémoriser une courbe représentant la densité de probabilité des longueurs de cale, en vue de fabriquer, indépendamment de la chaíne de fabrication des appareils électriques, un ensemble de cales obéissant à ladite courbe.Alternatively, the results of the measures of the durations of triggering, and on the other hand calculations of the correction distances can be memorized by the calculator, analyzed statistically in order to build and memorize a curve representing the probability density of the lengths of to manufacture independently of the production line of electrical appliances, a set of wedges obeying said curve.

Ces cales préfabriquées peuvent alors être stockées, par exemple par taille, et être sélectionnées pour être implantées dans des appareils en cours de fabrication en fonction des mesures réalisées avec la cale étalon.These prefabricated shims can then be stored, for example by size, and be selected to be implanted into devices in the process of manufacturing according to measurements made with the gauge block.

La sélection, puis l'extraction de chaque cale stockée peut être faite de manière automatisée ou manuelle.The selection and extraction of each stored hold can be done automated or manual.

L'invention concerne en second lieu également la cale proprement dite, qui relie la bilame à la serrure de déclenchement d'un appareil électrique modulaire de type disjoncteur, et est fabriquée individuellement pour chaque appareil selon le procédé décrit ci-dessus en vue de répondre aux normes de déclenchement sans nécessiter de réglages ultérieurs. Dans une des hypothèses de fonctionnement, elle est caractérisée en ce qu'elle est interposée entre la bilame et le déclencheur de la serrure, si le sens de déflection de la bilame tend à la rapprocher de ladite serrure. Elle agit alors sur deux surfaces en vis-à-vis respectivement de la bilame et du déclencheur.The invention also relates secondly to the actual wedge, which connects the bimetal at the trigger lock of a modular electrical appliance of the type circuit breaker, and is manufactured individually for each device according to the described above in order to meet triggering standards without require further adjustments. In one of the operating hypotheses, it is characterized in that it is interposed between the bimetal and the trigger of the lock, if the direction of deflection of the bimetallic strip tends to bring it closer to the said lock. It then acts on two surfaces vis-à-vis respectively bimetal and the shutter release.

Les surfaces actives de la cale sont donc deux surfaces opposées de la cale.The active surfaces of the hold are therefore two opposite surfaces of the hold.

Alternativement, ladite cale peut comporter deux surfaces en vis-à-vis agissant sur deux surfaces orientées à l'opposé respectivement sur la bilame et sur le déclencheur de la serrure, lorsque le sens de déflection de la bilame tend à l'écarter de ladite serrure.Alternatively, said wedge may comprise two surfaces facing each other on two opposite surfaces respectively on the bimetal and on the trigger of the lock, when the direction of deflection of the bimetallic tends to dismiss it of said lock.

Il s'agit de l'hypothèse dans laquelle les surfaces actives de la cale sont des surfaces sensiblement situées en vis-à-vis.This is the hypothesis in which the active surfaces of the hold are surfaces substantially located vis-à-vis.

Enfin, l'invention concerne un appareil électrique de sécurité à bilame de type disjoncteur, dont la bilame coopère avec une serrure de déclenchement apte à séparer un contact mobile d'un contact fixe lors d'une surcharge de courant, ledit appareil étant muni d'une des cales précitées.Finally, the invention relates to an electrical safety device with bimetallic type circuit breaker, the bimetallic cooperates with a trigger lock adapted to separating a movable contact from a fixed contact during a current overload, said apparatus being provided with one of the aforementioned wedges.

Dans l'invention, la possibilité déjà mentionnée de fabriquer la cale en temps réel et de gagner - dans le process de fabrication - le temps de réglage procure une plus value économique qui est encore améliorée par la suppression du dispositif de réglage et par celle du support flexible de la bilame et du ressort qui y est associé. L'absence de nécessité de réglage depuis l'extérieur du boítier rend ledit support flexible et son ressort inutiles, et l'utilisation d'un matériau rigide pour le support participe à cette économie additionnelle.In the invention, the possibility already mentioned to manufacture the hold in time real and win - in the manufacturing process - the adjustment time gets economic added value which is further improved by the removal of the adjustment device and that of the flexible support of the bimetallic strip and the spring is associated with it. No need for adjustment from outside the housing makes said flexible support and its spring unnecessary, and the use of a rigid material for the support participates in this additional saving.

L'invention va à présent être décrite plus en détail, en référence aux figures jointes, pour lesquelles :

  • la figure 1 montre la portion d'un disjoncteur comportant une cale selon l'invention, coopérant d'une part avec l'extrémité d'une bilame, et d'autre part avec le déclencheur de la serrure d'un disjoncteur ;
  • la figure 2 représente une vue en perspective plus détaillée du déclencheur d'un disjoncteur équipé d'une variante de cale selon l'invention ;
  • la figure 3 est quasiment identique à la précédente, la forme de ladite cale étant cependant plus visible car elle est extraite de sa position de fonctionnement ;
  • la figure 4 montre une version schématisée d'une configuration dans laquelle la cale coopère par tirage du déclencheur, à l'inverse de la configuration de la figure 1 ;
  • la figure 5 représente d'une manière schématique une chaíne de fabrication des cales ;
  • la figure 6 illustre le découpage des cales, à partir d'une bande continue et en deux phases, une première phase de découpe de la forme et une seconde phase d'ajustage de la longueur, en faisant figurer deux exemples montrant des cales de longueurs, et par conséquent de formes, différentes.
The invention will now be described in more detail with reference to the attached figures, in which:
  • Figure 1 shows the portion of a circuit breaker having a shim according to the invention, cooperating on the one hand with the end of a bimetallic strip, and on the other hand with the release of the lock of a circuit breaker;
  • FIG. 2 represents a more detailed perspective view of the trip unit of a circuit breaker equipped with a wedge variant according to the invention;
  • Figure 3 is almost identical to the previous one, the shape of said wedge being however more visible because it is extracted from its operating position;
  • Figure 4 shows a schematic version of a configuration in which the wedge cooperates by pulling the trigger, unlike the configuration of Figure 1;
  • Figure 5 schematically shows a chain of manufacture shims;
  • FIG. 6 illustrates the cutting of the wedges, from a continuous band and in two phases, a first phase of cutting the shape and a second phase of adjustment of the length, by showing two examples showing shims lengths and therefore different shapes.

En référence à la figure 1, la portion de disjoncteur qui est représentée comporte une bilame (1) coopérant avec le déclencheur (2) d'une serrure mécanique via une cale (3) selon la présente invention. Ladite serrure magnétique, reliée à un organe de commande manuelle (6), peut également être déclenchée par un ensemble de déclenchement magnétique qui est notamment activé en cas de court-circuit. Tous ces éléments, qui ne sont pas directement l'objet de l'invention, ne sont pas décrits dans le cadre de ce texte.With reference to FIG. 1, the portion of circuit breaker that is shown has a bimetallic strip (1) cooperating with the trigger (2) of a lock mechanical via a wedge (3) according to the present invention. Said magnetic lock, connected to a manual control member (6), can also be triggered by a magnetic trigger assembly which is activated in particular in case short circuit. All these elements, which are not directly the object of the invention are not described in the context of this text.

Dans la configuration montrée en figure 1, le sens de déflection de la bilame (1 ) est montré par la flèche (F), et les surfaces actives (4, 5) de la cale (3) sont opposées, car le système agit par poussage du déclencheur (2). L'effort développé par l'extrémité de la bilame (1) est appliqué contre la surface (5), puis répercuté au déclencheur (2) via la surface opposée (4).In the configuration shown in FIG. 1, the direction of deflection of the bimetallic strip (1) is shown by the arrow (F), and the active surfaces (4, 5) of the shim (3) are opposite, because the system acts by pushing the trigger (2). The effort developed by the end of the bimetallic strip (1) is applied against the surface (5), then echoed to the trigger (2) via the opposite surface (4).

La distance séparant les surfaces actives (4 et 5) est variable, et calculée individuellement pour chaque disjoncteur, selon la présente invention.The distance separating the active surfaces (4 and 5) is variable, and calculated individually for each circuit breaker, according to the present invention.

Les figures 2 et 3 illustrent une variante de forme de cale (3), laquelle obéit cependant à la même philosophie que dans la figure 1, c'est-à-dire que les surfaces actives (4 et 5) sont opposées, puisqu'il s'agit d'un système qui agit également par poussage du déclencheur (2). La configuration en fourche, particulièrement visible en figure 3, permet l'implantation de la pièce dans de bonnes conditions au montage, qui est le cas échéant automatisable. L'un des bras de la fourche comporte d'ailleurs une légère concavité (7) destinée à permettre un clipsage de la cale (3) au contact de la périphérie d'un ressort (8).Figures 2 and 3 illustrate a variant of wedge shape (3), which obeys however, with the same philosophy as in Figure 1, that is to say that the active surfaces (4 and 5) are opposed, since it is a system that acts also by pushing the trigger (2). Fork configuration, particularly visible in Figure 3, allows the implantation of the piece in good conditions for assembly, which can be automated if necessary. One of the arms the fork has a slight concavity (7) intended to allow a clipping the wedge (3) in contact with the periphery of a spring (8).

Dans l'hypothèse où le sens de déflection de la bilame (1 ) est inversé, et suit la flèche (F'), comme représenté en figure 4, la configuration est à tirage du déclencheur (2). Dans ce cas, la cale (3') est sensiblement en forme de U, et les surfaces actives (4') et (5') sont cette fois en vis-à-vis, et agissent par l'extérieur respectivement de la bilame (1) et (2) du déclencheur (2). Comme dans l'hypothèse précédente, la distance séparant les surfaces actives (4') et (5') est variable, et calculée individuellement pour chaque disjoncteur. In the event that the direction of deflection of the bimetallic strip (1) is reversed, and follows the arrow (F '), as shown in FIG. 4, the configuration is in the trigger (2). In this case, the wedge (3 ') is substantially U-shaped, and the active surfaces (4 ') and (5') are this time vis-à-vis, and act from outside respectively of the bimetal (1) and (2) of the trigger (2). As in the previous hypothesis, the distance separating the active surfaces (4 ') and (5') is variable, and calculated individually for each circuit breaker.

Les cales sont produites en continu selon un procédé schématisé en figure 5. La matière première est par exemple constituée d'un enroulement d'une bande (B) d'un matériau approprié à la fabrication des cales, ladite bande continue (B) étant entraínée et guidée vers un étage de poinçonnage où a lieu l'individualisation de chaque cale.The shims are continuously produced according to a process shown diagrammatically in FIG. The raw material is for example constituted of a winding of a band (B) a material suitable for making shims, said continuous band (B) being driven and guided to a punching stage where individualization takes place of each hold.

Plus précisément, la bande (B) est entraínée via un étage de guidage (9) vers un étage de découpage par poinçonnement (10) muni d'un poinçon de forme requise pour la fabrication des cales individualisées. Il est à noter que la cale pourrait tout aussi bien être obtenue par tout autre mode d'usinage (fraisage, découpe laser ou jet d'eau).More specifically, the strip (B) is driven via a guide stage (9) towards a punching stage (10) having a punch of form required for the manufacture of individual shims. It should be noted that the hold could equally well be obtained by any other method of machining (milling, laser cutting or water jet).

Le temps de déclenchement, par la bilame, de chaque disjoncteur doté d'une cale étalon auquel on injecte un courant I est traduit par un calculateur en une distance. Ce même calculateur envoie au système d'entraínement de la bande (B) une information selon laquelle le défilement de la bande (B) doit tenir compte de cette distance, qui peut par exemple être une correction à la distance sur laquelle la bande doit être entraínée pour la fabrication d'une cale étalon.The trip time, by the bimetallic strip, of each circuit breaker with a standard gauge which is injected with a current I is translated by a calculator into a distance. This same calculator sends to the training system of the band (B) information that the running of the strip (B) must take into account this distance, which can for example be a correction to the distance over which the band must be driven for the manufacture of a gauge block.

Ordre est ensuite donné à la tête munie de son poinçon de procéder au découpage de la cale.Order is then given to the head with its punch to proceed to cutting of the hold.

La figure 6 illustre bien la différence de formes obtenue pour les câbles en fonction de la différence de longueur parcourue par la bande entre deux poinçonnages successifs. Ainsi, en phase 1 une première découpe est réalisée par le poinçon. La forme de la cale correspond à celle qui est utilisée dans les figures 2 et 3. La fourche d'extrémité est agrémentée d'un bras latéral (11) réalisant la liaison avec l'extrémité libre de la bande (B) non encore usinée.FIG. 6 illustrates well the difference of shapes obtained for cables in function of the difference in length traveled by the band between two successive punching. Thus, in phase 1 a first cut is made by the punch. The shape of the hold corresponds to that used in Figures 2 and 3. The end fork is embellished with a lateral arm (11) realizing the connection with the free end of the strip (B) not yet machined.

Dans un second temps, apparaissant en phase 2, ladite bande (B) est entraínée d'une longueur I1 occasionnant un découpage dans ledit bras latéral (11) pratiquement au niveau de la fourche, c'est-à-dire que ledit bras (11) est quasi totalement amputé.In a second step, appearing in phase 2, said strip (B) is driven by a length I 1 causing cutting in said lateral arm (11) substantially at the fork, that is to say that said arm (11) is almost totally amputated.

Selon la mesure effectuée dans l'appareil électrique en cours de fabrication, le calculateur peut également donner l'ordre d'entraíner la bande d'une distance I2 un peu supérieure à la précédente, de telle sorte que la quasi totalité du bras latéral (11 ) soit conservée. C'est ce qui est illustré dans la phase 2' de la figure 6.Depending on the measurement made in the electrical apparatus during manufacture, the computer may also instruct the band to move the band a distance I 2 slightly greater than the previous one, so that almost all of the lateral arm (11) is retained. This is illustrated in phase 2 'of figure 6.

Les formes des cales, celle des poinçons, la schématisation de la ligne de fabrication desdites cales, etc. ne sont bien entendu que des exemples possibles, qui ne doivent pas être considérés comme exhaustifs de l'invention. Toute modification de forme et de configuration répondant à l'esprit de l'invention, et à la portée de l'homme de l'art, doit être considérée comme comprise dans la présente invention.The shapes of the holds, that of the punches, the schematization of the line of manufacture of said wedges, etc. are of course only examples possible, which should not be considered as exhaustive of the invention. Any modification of shape and configuration corresponding to the spirit of the invention, and within the reach of those skilled in the art, must be considered as included in the present invention.

Claims (10)

Procédé de fabrication d'une cale reliant la bilame et le déclencheur d'une serrure de déclenchement d'un appareil électrique de sécurité de type disjoncteur, en vue de dimensionner ladite cale à la fabrication de manière à ce que le déclenchement que provoque la bilame soit conforme aux normes en vigueur sans qu'il y ait nécessité de réglage ultérieur, caractérisé en ce que : l'appareil électrique modulaire est muni dans un premier temps d'une cale étalon dont la dimension fixée est sensiblement supérieure, dans la direction de la déflection de la bilame, à l'ordre de grandeur de la cale destinée à équiper l'appareil ; l'appareil est soumis à un courant Is de surcharge apte à le faire déclencher par déplacement de la bilame ; la durée td de déclenchement, à partir de l'application du courant Is, est mesurée ; cette durée td est comparée à une durée de déclenchement prédéterminée to correspondant à un appareil bien réglé, et convertie en une distance c de correction par un calculateur intégré à la chaíne de fabrication des cales ; ladite distance c est exploitée par cette chaíne pour la fabrication d'une cale individualisée, de longueur égale à celle de la cale étalon corrigée de la valeur c. A method of manufacturing a wedge connecting the bimetallic strip and the trigger of a trigger lock of a circuit breaker type electrical safety device, in order to size said wedge during manufacture so that the trigger caused by the bimetallic strip is in conformity with the standards in force without there being any need for further adjustment, characterized in that : the modular electrical apparatus is initially provided with a gauge block whose fixed dimension is substantially greater, in the direction of deflection of the bimetallic strip, to the order of magnitude of the shim intended to equip the apparatus; the apparatus is subjected to a current I s of overload capable of causing it to trip by displacement of the bimetallic strip; the duration t d of tripping, from the application of the current I s , is measured; this duration t d is compared with a predetermined tripping time t o corresponding to a well-tuned device, and converted into a correction distance c by a computer integrated in the production line of the holds; said distance c is exploited by this chain for the manufacture of an individual shim, equal in length to that of the corrected standard shim value c. Procédé de fabrication d'une cale selon la revendication précédente, caractérisé en ce que la vitesse Vf de déflection de la bilame étant connue, la distance c de correction est égale à c = Vf (to ― td).A method of manufacturing a wedge according to the preceding claim, characterized in that the deflection speed V f of the bimetal is known, the correction distance c is equal to c = V f (t o - t d ). Procédé de fabrication d'une cale selon l'une des revendications précédentes, caractérisé en ce que la cale est usinée dans une bande continue dont le déplacement axial est obtenu via un système d'entraínement actionné par le calculateur pour des avances successives correspondant à la fabrication d'une cale étalon corrigée de la valeur c.A method of manufacturing a shim according to one of the preceding claims, characterized in that the shim is machined in a continuous strip whose axial displacement is obtained via a drive system actuated by the computer for successive advances corresponding to the manufacture of a gauge block corrected for the value c. Procédé de fabrication d'une cale selon l'une quelconque des revendications précédentes, caractérisé en ce que l'usinage de chaque cale individualisée est réalisé immédiatement après la mesure de la durée de déclenchement de l'appareil équipé de la cale étalon. A method of manufacturing a shim according to any one of the preceding claims, characterized in that the machining of each individual shim is performed immediately after measuring the triggering time of the device equipped with the gauge block. Procédé de fabrication d'une cale selon l'une des revendications 1 et 2, caractérisé en ce que les résultats des mesures et des calculs sont mémorisés par le calculateur.A method of manufacturing a shim according to one of claims 1 and 2, characterized in that the results of measurements and calculations are stored by the computer. Procédé de fabrication d'une cale selon la revendication précédente, caractérisé en ce que les résultats mémorisés sont analysés statistiquement par le calculateur en vue de construire et de mémoriser une courbe représentant la densité de probabilité des longueurs de cale.A method of manufacturing a shim according to the preceding claim, characterized in that the stored results are analyzed statistically by the computer to construct and store a curve representing the probability density of the shim lengths. Procédé de fabrication d'une cale selon la revendication précédente, caractérisé en ce qu'un ensemble de cales obéissant à ladite courbe est fabriqué en continu sur la chaíne de fabrication des cales.A method of manufacturing a shim according to the preceding claim, characterized in that a set of shims obeying said curve is manufactured continuously on the production line shims. Cale reliant la bilame et la serrure de déclenchement d'un appareil de sécurité thermique à bilame, en vue de répercuter à l'un le déplacement de l'autre, fabriquée selon un procédé suivant l'une des revendications précédentes individuellement pour chaque appareil en vue de répondre aux normes de déclenchement sans nécessiter de réglages ultérieurs, caractérisée en ce qu'elle est interposée entre la bilame et le déclencheur de la serrure, dans le cas où le sens de déflection de la bilame tend à la rapprocher dudit déclencheur, et agit sur deux surfaces vis-à-vis respectivement de la bilame et du déclencheur.Wedge connecting the bimetallic strip and the release lock of a bimetallic thermal safety device, in order to pass on to one the movement of the other, manufactured according to a method according to one of the preceding claims individually for each device to meet the triggering standards without requiring subsequent adjustments, characterized in that it is interposed between the bimetallic strip and the trigger of the lock, in the case where the direction of deflection of the bimetal strip tends to bring it closer to said trigger, and acts on two surfaces vis-a-vis the bimetallic strip and the trigger respectively. Cale reliant la bilame et la serrure de déclenchement d'un appareil de sécurité thermique à bilame en vue de répercuter à l'un le déplacement de l'autre, fabriquée selon un procédé suivant une des revendications 1 à 7 individuellement pour chaque appareil pour le rendre conforme aux normes de déclenchement sans nécessiter de réglages ultérieurs, caractérisée en ce qu'elle comporte deux surfaces en vis-à-vis agissant sur deux surfaces orientées à l'opposé respectivement de la bilame et du déclencheur de la serrure, lorsque le sens de déflection de la bilame tend à l'écarter du déclencheur.Wedge connecting the bimetallic strip and the release lock of a thermal bimetallic safety device for passing the displacement of the other to one, manufactured according to a method according to one of claims 1 to 7 individually for each device for to comply with the trigger standards without requiring subsequent adjustments, characterized in that it comprises two surfaces facing each other acting on two opposite surfaces respectively of the bimetallic strip and the trigger of the lock, when the direction deflection of the bimetal tends to separate it from the trigger. Appareil électrique de sécurité à bilame de type disjoncteur, dont la bilame coopère avec une serrure de déclenchement séparant un contact mobile d'un contact fixe lors d'une surcharge de courant, caractérisé en ce qu'il est muni d'une cale selon l'une des revendications 8 et 9.Electrical safety device with bimetallic circuit breaker type, the bimetallic cooperates with a trigger lock separating a movable contact from a fixed contact during a current overload, characterized in that it is provided with a shim according to the invention. one of claims 8 and 9.
EP03360068A 2003-05-30 2003-05-30 Method of manufacturing of wedges that are positioned between the bimetal and the trigger of a safety switch Expired - Lifetime EP1482529B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP03360068A EP1482529B1 (en) 2003-05-30 2003-05-30 Method of manufacturing of wedges that are positioned between the bimetal and the trigger of a safety switch
DE60301865T DE60301865T2 (en) 2003-05-30 2003-05-30 Method for producing the wedges which lie between the bimetallic element and the trigger of a contactor switch
AT03360068T ATE306718T1 (en) 2003-05-30 2003-05-30 METHOD FOR PRODUCING THE WEDGES BETWEEN THE BIMETALLIC ELEMENT AND THE TRIGGER OF A CONTACTOR
SI200330116T SI1482529T1 (en) 2003-05-30 2003-05-30 Method of manufacturing of wedges that are positioned between the bimetal and the trigger of a safety switch
ES03360068T ES2248717T3 (en) 2003-05-30 2003-05-30 PROCEDURE FOR THE MANUFACTURE OF INTERPOSED SHOES BETWEEN THE BIMETAL ELEMENT AND THE TRIGGER OF A SAFETY DEVICE OF THE TYPE OF DYE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03360068A EP1482529B1 (en) 2003-05-30 2003-05-30 Method of manufacturing of wedges that are positioned between the bimetal and the trigger of a safety switch

Publications (2)

Publication Number Publication Date
EP1482529A1 true EP1482529A1 (en) 2004-12-01
EP1482529B1 EP1482529B1 (en) 2005-10-12

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EP03360068A Expired - Lifetime EP1482529B1 (en) 2003-05-30 2003-05-30 Method of manufacturing of wedges that are positioned between the bimetal and the trigger of a safety switch

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EP (1) EP1482529B1 (en)
AT (1) ATE306718T1 (en)
DE (1) DE60301865T2 (en)
ES (1) ES2248717T3 (en)
SI (1) SI1482529T1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2876664A1 (en) * 2013-10-17 2015-05-27 LSIS Co., Ltd. Trip device for circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008031894B4 (en) * 2008-07-08 2014-03-13 Abb Ag Electrical switching device with a thermal release

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944959A (en) * 1973-10-04 1976-03-16 Dorman Smith Switchgear Limited Electrical circuit breaker
US5317471A (en) * 1991-11-13 1994-05-31 Gerin Merlin Process and device for setting a thermal trip device with bimetal strip
US6459355B1 (en) * 1999-12-01 2002-10-01 Fuji Electric Co., Ltd. Thermal overload relay

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944959A (en) * 1973-10-04 1976-03-16 Dorman Smith Switchgear Limited Electrical circuit breaker
US5317471A (en) * 1991-11-13 1994-05-31 Gerin Merlin Process and device for setting a thermal trip device with bimetal strip
US6459355B1 (en) * 1999-12-01 2002-10-01 Fuji Electric Co., Ltd. Thermal overload relay

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2876664A1 (en) * 2013-10-17 2015-05-27 LSIS Co., Ltd. Trip device for circuit breaker
US10290446B2 (en) 2013-10-17 2019-05-14 Lsis Co., Ltd. Trip device for circuit breaker

Also Published As

Publication number Publication date
DE60301865T2 (en) 2006-06-22
EP1482529B1 (en) 2005-10-12
SI1482529T1 (en) 2006-02-28
DE60301865D1 (en) 2005-11-17
ATE306718T1 (en) 2005-10-15
ES2248717T3 (en) 2006-03-16

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