EP3300533A1 - Circuit breaker-type protective apparatus comprising a stop for adjusting the calibration spring - Google Patents

Circuit breaker-type protective apparatus comprising a stop for adjusting the calibration spring

Info

Publication number
EP3300533A1
EP3300533A1 EP17709128.7A EP17709128A EP3300533A1 EP 3300533 A1 EP3300533 A1 EP 3300533A1 EP 17709128 A EP17709128 A EP 17709128A EP 3300533 A1 EP3300533 A1 EP 3300533A1
Authority
EP
European Patent Office
Prior art keywords
spring
shaft
stop
hooking part
protective device
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
EP17709128.7A
Other languages
German (de)
French (fr)
Other versions
EP3300533B1 (en
Inventor
Stéphane Eloy
Jérémy JELSCH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hager Electro SAS
Original Assignee
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
Publication of EP3300533A1 publication Critical patent/EP3300533A1/en
Application granted granted Critical
Publication of EP3300533B1 publication Critical patent/EP3300533B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H01H71/7463—Adjusting only the electromagnetic mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H2009/0088—Details of rotatable shafts common to more than one pole or switch unit
    • 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
    • H01H2069/013—Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions with calibrating screws in trip bar
    • 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
    • H01H2071/7481—Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob

Definitions

  • Circuit breaker type protection device having a calibration spring adjustment stop
  • the present invention relates to an electrical line protection device, circuit breaker type, designed to ensure the protection of at least one line by circuit opening in the event of a fault resulting from a rapid rise in the current in this line, for example more a short circuit, or a slow rise in case of overload in this line, and a method using such a protective device.
  • a type of protective device of at least one line of the circuit breaker type comprises a magnetic assembly comprising a coil connected to the circuit of the current line, having a core fixed metal, and a movable core against a calibration spring having a calibrated force.
  • the current in the coil generates a magnetic attraction force on the mobile core depending on its intensity, which from a magnetic force threshold compresses the return spring by moving a trigger.
  • the trigger then allows a pivoting arm mounted on an axis, to switch by causing a blunt opening of a contact disposed in the electrical circuit.
  • the various electrical and mechanical components forming this system have manufacturing dispersions including dimensional tolerances, which give an inaccuracy on the magnetic stress threshold.
  • the series-produced calibration spring has force dispersions which are predominant in the magnetic threshold deviations.
  • a known solution is to reduce the manufacturing dispersions of the various components, in particular those of the spring, to obtain a more precise magnetic stress threshold.
  • this solution leads to a significant increase in the costs of manufacturing processes and control of these components.
  • Another known solution is to assemble the protection device with a particular calibration spring, then after a measurement of the current related to the magnetic threshold triggering the disjunction, replace this spring to adjust its force level to obtain the requested accuracy for the magnetic threshold.
  • the present invention is intended to avoid these disadvantages of the prior art.
  • an electrical protection device of the circuit-breaker type comprising a shaft, a calibration spring, at least one electrical circuit designed to pass the current of a power line, and a coil connected to this circuit having a movable core attracted by this coil which moves from a magnetic force threshold, by compressing the calibration spring having turns wrapped around the shaft and a gripping part connected to this shaft, for to open a contact of the electrical circuit,
  • this protection device being remarkable in that the shaft comprises an adjustment stop receiving the support of the spring hooking part, having several positions giving positioning gaps of this hooking part .
  • An advantage of this device is that an operator can access the adjustment stopper depending on a current measurement giving the triggering magnetic threshold, quickly change the position of the calibration spring support.
  • the protection apparatus according to the invention may further comprise one or more of the following features, which may be combined with each other.
  • the adjustable stop is rotatably mounted about a pivot, perpendicular to the axis of rotation of the shaft, said adjustable stop having different bearing sides of the snap portion of the spring, arranged around a pivot preferably perpendicular to the axis of rotation of the shaft.
  • the adjustable stop has a substantially polygonal shape, preferably substantially square. In this way at least three support positions are obtained for fastening the spring.
  • the sides of the adjustable bearing abutment of the spring attachment portion each have a recess extending in a direction substantially parallel to this side and adapted to receive the attachment portion. This is a maintenance of the spring wire.
  • the adjustable stop has a slot for driving it in rotation using a screwdriver.
  • a simple way is obtained to maneuver the adjustment stop which can be at the bottom of a housing of its housing.
  • the angular spacing of the attachment portion of the spring about the axis of the shaft may be less than 10 °.
  • the spring stiffness difference may be less than or equal to 10%.
  • the adjustment stop comprises a marking indicating in the direction of movement an increase or decrease in the magnetic stress threshold. The operator thus easily sees the direction of movement to be applied to make his adjustment.
  • the spring comprises two bodies of turns connected by a straight portion parallel to the shaft forming the attachment portion of this spring.
  • a symmetrical spring is obtained with respect to the attachment part, which has a better balance.
  • the invention also relates to a method for adjusting an electric line protection device comprising any one of the preceding characteristics, which comprises a step of measuring the current in the electrical circuit for the magnetic stress threshold, then if necessary a step of modifying the position of the adjustment stop fixed on the shaft receiving the support of the attachment portion of the spring, to modify the preload of this spring.
  • FIG. 1 shows the inside of a protection device according to the invention, designed to protect a line comprising three poles;
  • Figure 2 is a perspective view showing the metal cores of the central coil of this apparatus, and the axis supporting the calibration spring of this coil;
  • Figures 3 and 4 are respectively a top view is a side view of this axis.
  • Figures 5 and 6 are sectional views of this axis respectively presented along the sectional plane V-V and VI-VI.
  • Figures 1 and 2 show a support 2 of molded plastic material, comprising three parallel assemblies provided to independently provide the safety of three power lines, each comprising a metallic electrical contact 4 providing a connection to this line.
  • Figure 2 details elements of the central assembly, which are similar for the other two on the sides.
  • Each set comprises a winding, not shown, arranged along a magnetic main axis of winding, framed on one side of this axis by a fixed metal core 6 covering the rear face and the lateral parts of this coil, and on the other side of this axis by a movable metal core 8 covering the front face of this coil.
  • the movable metal core 8 has two lower tabs 10 allowing pivoting of the movable core to move closer to the coil along its magnetic axis.
  • Each spring 14 comprises a central right portion parallel to the shaft 12 forming a hooking portion 16 fixed to this shaft, extending at each end by a helical portion 14 contiguous turns wound around this shaft, which ends with a straight segment forming a movable portion 18, comprising at its end a small hook bearing on the top of the movable core 8 at a lateral point.
  • a rocking lever 20 forming a release is released when the movable core 8 moves towards the coil, from a force of attraction of this coil exceeding the constant force of the calibrated spring 14.
  • the lever 20 rocker, and abruptly opens an electrical contact of the electrical circuit to achieve the disjunction of this circuit.
  • the rocking lever 20 is rigidly connected to the shaft 12.
  • the protection device comprises user adjustment buttons 22 protruding above the housing 2, which are accessible from the outside when this apparatus is covered with a protective cover, allowing it to be turned with a screwdriver a particular adjustment of the housing.
  • breaker magnetic tripping threshold indicated by markings applied to the hood opposite the positions of the adjustment knob.
  • the particular magnetic trip threshold setting requires a fine calibration of this trigger level of the device to provide the required protection. It is therefore interesting to provide a factory setting for fine calibration of the trigger level.
  • an adjustable stop 30 substantially forming a molded plastic square, fixed on the shaft 12 by a center pivot O preferably perpendicular to the axis of this shaft, including a face parallel to this axis, facing the opposite side to movable core 8, carries the support of the attachment portion 16 of the calibration spring to secure it with this shaft.
  • Three active sides of the square of the adjustable abutment 30 comprise a slight recess 40 extending in a direction substantially parallel to this side, which allows the adjustment of the straight attachment portion 16 of the spring 14 to avoid a disengagement of this part.
  • the top of the square of the adjustable stop 30 has a central slot 32 allowing the engagement of a screwdriver 34 shown in FIG. 1, in order to turn this stop a quarter turn to the left as shown by the arrow 36 towards a side presenting a marking "-", or on the right as presented by the arrow 38 to a side having a marking "+".
  • the top of the square of the adjustable stop 30 may have a cruciform central recess for the engagement of a Phillips screwdriver.
  • the three active sides of the square of the adjustable stop 30 being at a progressively greater distance from its pivot O, one obtains a rotation of this square successively starting from the position A shown on the right in FIG. 3 after a rotation indicated by FIG.
  • the positions of the adjustable stop 30 give between two successive positions a difference in angular position of the attachment portion 16 of the spring 14 around the shaft 12, varying by 5 °. These angular position variations allow, between two positions, to compensate for the stiffness of the spring 14 between + 1-1% and +/- 10% depending on the stiffness of the spring adapted to current intensity calibres.
  • This adjustable stop system 30 integrated on the shaft 12 is very compact, and can be easily added to an existing device without changing its size.
  • the use of three faces of the square of the adjustable stop 30 gives by the support of the right hooking portion 16 of the spring 14 on these faces, very stable indexed positions.
  • the four faces of the square could be used, or a stop having a different number of support faces. It is also possible to use an adjustable stop having a support of the attachment point of the spring 16 giving a continuous variation of the position of this attachment point.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

Circuit breaker-type protective apparatus for power lines, comprising at least one electrical circuit designed to allow the current of a power line to pass, and a coil connected to this circuit, having a movable core (8), attracted by this coil, which is moved as from a magnetic force threshold, thereby compressing a calibration spring (14) having coils wound about a shaft (12) and an engagement part (16) connected thereto, to open a contact of the electrical circuit, the shaft (12) comprising an adjustment stop (30) on which the engagement part (16) of the spring (14) bears, and having several positions providing for variations in the positioning of this engagement part.

Description

Appareil de protection du type disjoncteur comportant une butée de réglage du ressort de calibrage  Circuit breaker type protection device having a calibration spring adjustment stop
La présente invention concerne un appareil de protection de lignes électriques, du type disjoncteur, conçu pour assurer la protection d'au moins une ligne par ouverture de circuit en cas de défaut venant d'une élévation rapide du courant dans cette ligne, par exemple suite à un court- circuit, ou d'une élévation lente en cas de surcharge dans cette ligne, ainsi qu'un procédé mettant en œuvre un tel appareil de protection. The present invention relates to an electrical line protection device, circuit breaker type, designed to ensure the protection of at least one line by circuit opening in the event of a fault resulting from a rapid rise in the current in this line, for example more a short circuit, or a slow rise in case of overload in this line, and a method using such a protective device.
Un type d'appareil de protection d'au moins une ligne du type disjoncteur, présenté notamment par le document FR-A 1-2987164, comporte un ensemble magnétique comprenant une bobine reliée au circuit de la ligne de courant, disposant d'un noyau métallique fixe, et d'un noyau mobile à l'encontre d'un ressort de calibrage présentant un effort calibré.  A type of protective device of at least one line of the circuit breaker type, presented in particular by the document FR-A 1-2987164, comprises a magnetic assembly comprising a coil connected to the circuit of the current line, having a core fixed metal, and a movable core against a calibration spring having a calibrated force.
Le courant dans la bobine génère une force magnétique d'attraction sur le noyau mobile dépendant de son intensité, qui à partir d'un seuil magnétique d'effort comprime le ressort de rappel en déplaçant un déclencheur. Le déclencheur permet alors à un bras pivotant monté sur un axe, de basculer en provoquant une ouverture franche d'un contact disposé dans le circuit électrique.  The current in the coil generates a magnetic attraction force on the mobile core depending on its intensity, which from a magnetic force threshold compresses the return spring by moving a trigger. The trigger then allows a pivoting arm mounted on an axis, to switch by causing a blunt opening of a contact disposed in the electrical circuit.
On obtient ainsi une protection efficace de la ligne de courant, dépendant directement du courant appliqué dans cette ligne.  This provides effective protection of the current line, directly dependent on the current applied in this line.
Pour une fabrication en grande série, les différents composants électriques et mécaniques formant ce système présentent des dispersions de fabrication venant notamment des tolérances dimensionnelles, qui donnent une imprécision sur le seuil magnétique d'effort. En particulier le ressort de calibrage produit en série présente des dispersions de force qui sont prépondérantes dans les écarts de seuil magnétique.  For mass production, the various electrical and mechanical components forming this system have manufacturing dispersions including dimensional tolerances, which give an inaccuracy on the magnetic stress threshold. In particular, the series-produced calibration spring has force dispersions which are predominant in the magnetic threshold deviations.
Une solution connue consiste à réduire les dispersions de fabrication des différents composants, en particulier celles du ressort, pour obtenir un seuil magnétique d'effort plus précis. Cependant cette solution entraîne une augmentation importante des coûts des procédés de fabrication et de contrôle de ces composants.  A known solution is to reduce the manufacturing dispersions of the various components, in particular those of the spring, to obtain a more precise magnetic stress threshold. However, this solution leads to a significant increase in the costs of manufacturing processes and control of these components.
Une autre solution connue consiste à assembler l'appareil de protection avec un ressort de calibrage particulier, puis après une mesure du courant lié au seuil magnétique déclenchant la disjonction, remplacer ce ressort pour ajuster son niveau de force afin d'obtenir la précision demandée pour le seuil magnétique. Another known solution is to assemble the protection device with a particular calibration spring, then after a measurement of the current related to the magnetic threshold triggering the disjunction, replace this spring to adjust its force level to obtain the requested accuracy for the magnetic threshold.
Cependant cette solution nécessite des temps de manipulation, qui entraînent des coûts plus élevés.  However, this solution requires handling times, which entail higher costs.
II est connu aussi de disposer un ressort présentant plusieurs positions d'accrochage, pour obtenir différents niveaux de force en modifiant cet accrochage. Cette solution nécessite plusieurs positions d'accrochage pour le ressort qui prennent de la place, elle peut ne pas être adaptée en particulier pour des appareils de protection très compacts.  It is also known to have a spring having several attachment positions, to obtain different levels of force by modifying this attachment. This solution requires several attachment positions for the spring that take up space, it may not be suitable in particular for very compact protection devices.
La présente invention a notamment pour but d'éviter ces inconvénients de la technique antérieure.  The present invention is intended to avoid these disadvantages of the prior art.
Elle propose à cet effet un appareil de protection de lignes électriques, du type disjoncteur, comportant un arbre, un ressort de calibrage, au moins un circuit électrique prévu pour passer le courant d'une ligne électrique, et une bobine reliée à ce circuit disposant d'un noyau mobile attiré par cette bobine qui se déplace à partir d'un seuil magnétique d'effort, en comprimant le ressort de calibrage présentant des spires enroulées autour de l'arbre et une partie d'accrochage liée à cet arbre, pour ouvrir un contact du circuit électrique, cet appareil de protection étant remarquable en ce l'arbre comporte une butée de réglage recevant l'appui de la partie d'accrochage du ressort, présentant plusieurs positions donnant des écarts de positionnement de cette partie d'accrochage.  To this end, it proposes an electrical protection device of the circuit-breaker type comprising a shaft, a calibration spring, at least one electrical circuit designed to pass the current of a power line, and a coil connected to this circuit having a movable core attracted by this coil which moves from a magnetic force threshold, by compressing the calibration spring having turns wrapped around the shaft and a gripping part connected to this shaft, for to open a contact of the electrical circuit, this protection device being remarkable in that the shaft comprises an adjustment stop receiving the support of the spring hooking part, having several positions giving positioning gaps of this hooking part .
Un avantage de cet appareil est qu'un opérateur peut accéder à la butée de réglage pour en fonction d'une mesure du courant donnant le seuil magnétique de déclenchement, rapidement changer la position de l'appui du ressort de calibrage. On modifie ainsi facilement avec ce système qui peut être compact, la position de la partie fixe du ressort par rapport à l'arbre et donc sa précontrainte, ce qui permet de corriger le seuil magnétique de déclenchement pour obtenir la précision souhaitée.  An advantage of this device is that an operator can access the adjustment stopper depending on a current measurement giving the triggering magnetic threshold, quickly change the position of the calibration spring support. With this system, which can be compact, the position of the fixed part of the spring with respect to the shaft and thus its prestressing is thus easily modified, which makes it possible to correct the magnetic tripping threshold in order to obtain the desired precision.
L'appareil de protection selon l'invention peut comporter de plus une ou plusieurs des caractéristiques suivantes, qui peuvent être combinées entre elles.  The protection apparatus according to the invention may further comprise one or more of the following features, which may be combined with each other.
Avantageusement, la butée réglable est montée en rotation autour d'un pivot, perpendiculaire à l'axe de rotation de l'arbre, ladite butée réglable comportant différents côtés d'appui de la partie d'accrochage du ressort, disposés autour d'un pivot de préférence perpendiculaire à l'axe de rotation de l'arbre. Dans ce cas, selon un mode de réalisation la butée réglable a une forme sensiblement polygonale, de préférence sensiblement carrée. On obtient de cette manière au moins trois positions d'appui pour l'accrochage du ressort. Advantageously, the adjustable stop is rotatably mounted about a pivot, perpendicular to the axis of rotation of the shaft, said adjustable stop having different bearing sides of the snap portion of the spring, arranged around a pivot preferably perpendicular to the axis of rotation of the shaft. In this case, according to one embodiment the adjustable stop has a substantially polygonal shape, preferably substantially square. In this way at least three support positions are obtained for fastening the spring.
Avantageusement, les côtés de la butée réglable d'appui de la partie d'accrochage du ressort, présentent chacun un creux s 'étendant dans une direction essentiellement parallèle à ce côté et prévu pour recevoir cette partie d'accrochage. On réalise ainsi un maintien du fil du ressort.  Advantageously, the sides of the adjustable bearing abutment of the spring attachment portion, each have a recess extending in a direction substantially parallel to this side and adapted to receive the attachment portion. This is a maintenance of the spring wire.
Avantageusement, la butée réglable comporte une fente permettant son entraînement en rotation à l'aide d'un tournevis. On obtient un moyen simple pour manœuvrer la butée de réglage qui peut se trouver au fond d'un logement de son boîtier.  Advantageously, the adjustable stop has a slot for driving it in rotation using a screwdriver. A simple way is obtained to maneuver the adjustment stop which can be at the bottom of a housing of its housing.
En particulier entre deux positions successives de la butée réglable, l'écart angulaire de la partie d'accrochage du ressort autour de l'axe de l'arbre peut être inférieur à 10°.  In particular between two successive positions of the adjustable stop, the angular spacing of the attachment portion of the spring about the axis of the shaft may be less than 10 °.
En particulier entre deux positions successives de la butée réglable, la différence de raideur du ressort peut être inférieure ou égale à 10%.  In particular between two successive positions of the adjustable stop, the spring stiffness difference may be less than or equal to 10%.
Avantageusement, la butée de réglage comporte un marquage indiquant suivant son sens de déplacement une augmentation ou une diminution du seuil magnétique d'effort. L'opérateur voit ainsi facilement le sens de déplacement à appliquer pour effectuer son réglage.  Advantageously, the adjustment stop comprises a marking indicating in the direction of movement an increase or decrease in the magnetic stress threshold. The operator thus easily sees the direction of movement to be applied to make his adjustment.
Avantageusement, le ressort comporte deux corps de spires reliés par une partie droite parallèle à l'arbre formant la partie d'accrochage de ce ressort. On obtient un ressort symétrique par rapport à la partie d'accrochage, qui comporte un meilleur équilibre.  Advantageously, the spring comprises two bodies of turns connected by a straight portion parallel to the shaft forming the attachment portion of this spring. A symmetrical spring is obtained with respect to the attachment part, which has a better balance.
L'invention a aussi pour objet un procédé de réglage d'un appareil de protection de lignes électriques comprenant l'une quelconque des caractéristiques précédentes, qui comporte une étape de mesure du courant dans le circuit électrique pour le seuil magnétique d'effort, puis si nécessaire une étape de modification de la position de la butée de réglage fixée sur l'arbre recevant l'appui de la partie d'accrochage du ressort, pour modifier la précontrainte de ce ressort.  The invention also relates to a method for adjusting an electric line protection device comprising any one of the preceding characteristics, which comprises a step of measuring the current in the electrical circuit for the magnetic stress threshold, then if necessary a step of modifying the position of the adjustment stop fixed on the shaft receiving the support of the attachment portion of the spring, to modify the preload of this spring.
L'invention sera mieux comprise et d'autres caractéristiques et avantages apparaîtront plus clairement à la lecture de la description ci-après donnée à titre d'exemple, en référence aux dessins annexés dans lesquels : la figure 1 présente l'intérieur d'un appareil de protection selon l'invention, prévu pour protéger une ligne comprenant trois pôles ; The invention will be better understood and other features and advantages will emerge more clearly on reading the following description given by way of example, with reference to the appended drawings in which: FIG. 1 shows the inside of a protection device according to the invention, designed to protect a line comprising three poles;
la figure 2 est une vue en perspective présentant les noyaux métalliques de la bobine centrale de cet appareil, et l'axe supportant le ressort de calibrage de cette bobine ;  Figure 2 is a perspective view showing the metal cores of the central coil of this apparatus, and the axis supporting the calibration spring of this coil;
les figures 3 et 4 sont respectivement une vue de dessus est une vue de côté de cet axe ; et  Figures 3 and 4 are respectively a top view is a side view of this axis; and
les figures 5 et 6 sont des vues en coupe de cet axe présentées respectivement suivant le plan de coupe V-V et VI- VI.  Figures 5 and 6 are sectional views of this axis respectively presented along the sectional plane V-V and VI-VI.
Les figures 1 et 2 présentent un support 2 en matière plastique moulée, comportant trois ensembles parallèles prévus pour assurer de manière indépendante la sécurité de trois lignes de courant, comprenant chacun un contact électrique 4 métallique assurant une connexion vers cette ligne.  Figures 1 and 2 show a support 2 of molded plastic material, comprising three parallel assemblies provided to independently provide the safety of three power lines, each comprising a metallic electrical contact 4 providing a connection to this line.
La figure 2 détaille des éléments de l'ensemble central, qui sont similaires pour les deux autres sur les côtés.  Figure 2 details elements of the central assembly, which are similar for the other two on the sides.
Chaque ensemble comporte un bobinage non représenté, disposée suivant un axe principal magnétique d'enroulement, encadré d'un côté de cet axe par un noyau métallique fixe 6 recouvrant la face arrière et les parties latérales de cette bobine, et de l'autre côté de cet axe par un noyau métallique mobile 8 recouvrant la face avant de cette bobine.  Each set comprises a winding, not shown, arranged along a magnetic main axis of winding, framed on one side of this axis by a fixed metal core 6 covering the rear face and the lateral parts of this coil, and on the other side of this axis by a movable metal core 8 covering the front face of this coil.
Le noyau métallique mobile 8 comporte deux pattes inférieures 10 permettant un pivotement de ce noyau mobile pour se rapprocher de la bobine suivant son axe magnétique.  The movable metal core 8 has two lower tabs 10 allowing pivoting of the movable core to move closer to the coil along its magnetic axis.
Un arbre 12 libre en rotation dans le support 2 et disposé au- dessus des noyaux métalliques 6, 8 perpendiculairement à l'axe magnétique de la bobine, supporte au-dessus de chaque bobine un ressort 14 présentant un plan de symétrie vertical passant par cet axe magnétique.  A shaft 12 free in rotation in the support 2 and disposed above the metal cores 6, 8 perpendicular to the magnetic axis of the coil, supports above each coil a spring 14 having a vertical plane of symmetry passing through this magnetic axis.
Chaque ressort 14 comporte une partie centrale droite parallèle à l'arbre 12 formant une partie d'accrochage 16 fixée à cet arbre, se prolongeant à chaque extrémité par une partie hélicoïdale 14 à spires jointives enroulée autour de cet arbre, qui se termine par un segment droit formant une partie mobile 18, comprenant à son extrémité un petit crochet venant en appui sur le haut du noyau mobile 8 en un point latéral.  Each spring 14 comprises a central right portion parallel to the shaft 12 forming a hooking portion 16 fixed to this shaft, extending at each end by a helical portion 14 contiguous turns wound around this shaft, which ends with a straight segment forming a movable portion 18, comprising at its end a small hook bearing on the top of the movable core 8 at a lateral point.
De cette manière on obtient un ressort calibré 14 à double corps de spires, prenant appui par sa partie d'accrochage 16 sur l'arbre 12 pour obtenir une réaction, et appliquant un appui symétrique de chaque côté en haut du noyau mobile 8, développant en permanence un effort calibré sur ce noyau qui tend à l'écarter de la bobine, allant à rencontre de sa force d'attraction. In this way we obtain a calibrated spring 14 with double turn body, supported by its attachment portion 16 on the shaft 12 to obtain a reaction, and applying symmetrical support on each side. top of the mobile core 8, continuously developing a calibrated force on the core which tends to move away from the coil, going against its attractive force.
Pour chaque bobine un levier basculant 20 formant un déclencheur est libéré quand le noyau mobile 8 se déplace vers la bobine, à partir d'une force d'attraction de cette bobine dépassant l'effort constant du ressort calibré 14. Dans ce cas le levier 20 bascule, et ouvre brusquement un contact électrique du circuit électrique pour réaliser la disjonction de ce circuit. De préférence, le levier basculant 20 est rigidement lié à l'arbre 12.  For each coil a rocking lever 20 forming a release is released when the movable core 8 moves towards the coil, from a force of attraction of this coil exceeding the constant force of the calibrated spring 14. In this case the lever 20 rocker, and abruptly opens an electrical contact of the electrical circuit to achieve the disjunction of this circuit. Preferably, the rocking lever 20 is rigidly connected to the shaft 12.
L'appareil de protection comporte des boutons de réglage utilisateur 22 dépassant au-dessus du boîtier 2, qui sont accessibles de l'extérieur quand cet appareil est recouvert d'un capot de protection, permettant en le tournant avec un tournevis un réglage particulier du seuil de déclenchement magnétique du disjoncteur indiqué par des marquages appliqués sur le capot en face des positions du bouton de réglage.  The protection device comprises user adjustment buttons 22 protruding above the housing 2, which are accessible from the outside when this apparatus is covered with a protective cover, allowing it to be turned with a screwdriver a particular adjustment of the housing. breaker magnetic tripping threshold indicated by markings applied to the hood opposite the positions of the adjustment knob.
Le réglage particulier de seuil de déclenchement magnétique nécessite une calibration fine de ce niveau de déclenchement de l'appareil afin d'assurer la protection requise. Il est donc intéressant de prévoir un réglage en usine permettant la calibration fine du niveau de déclenchement.  The particular magnetic trip threshold setting requires a fine calibration of this trigger level of the device to provide the required protection. It is therefore interesting to provide a factory setting for fine calibration of the trigger level.
Les figures 3, 4 et 5 présentent pour chaque ressort de calibrage Figures 3, 4 and 5 show for each calibration spring
14 une butée réglable 30 formant sensiblement un carré en matière plastique moulée, fixé sur l'arbre 12 par un pivot de centre O de préférence perpendiculaire à l'axe de cet arbre, dont une face parallèle à cet axe, tournée du côté opposé au noyau mobile 8, réalise l'appui de la partie d'accrochage 16 du ressort de calibrage afin de la solidariser avec cet arbre. 14 an adjustable stop 30 substantially forming a molded plastic square, fixed on the shaft 12 by a center pivot O preferably perpendicular to the axis of this shaft, including a face parallel to this axis, facing the opposite side to movable core 8, carries the support of the attachment portion 16 of the calibration spring to secure it with this shaft.
Trois côtés actifs du carré de la butée réglable 30 comportent un léger creux 40 s'étendant dans une direction essentiellement parallèle à ce côté, qui permet l'ajustement de la partie droite d'accrochage 16 du ressort 14 afin d'éviter un déboîtement de cette partie.  Three active sides of the square of the adjustable abutment 30 comprise a slight recess 40 extending in a direction substantially parallel to this side, which allows the adjustment of the straight attachment portion 16 of the spring 14 to avoid a disengagement of this part.
Le dessus du carré de la butée réglable 30 présente une fente centrale 32 permettant l'engagement d'un tournevis 34 présenté figure 1, afin de tourner cette butée d'un quart de tour à gauche comme présenté par la flèche 36 vers un côté présentant un marquage « - », ou à droite comme présenté par la flèche 38 vers un côté présentant un marquage « + ». De façon alternative, le dessus du carré de la butée réglable 30 peut présenter un creux central cruciforme permettant l'engagement d'un tournevis cruciforme. Les trois côtés actifs du carré de la butée réglable 30 étant à une distance progressivement plus grande de son pivot O, on obtient par une rotation de ce carré successivement en partant de la position A présentée à droite sur la figure 3 après une rotation indiquée par la flèche 36 dans le sens « - », une position de la partie droite d'accrochage 16 du ressort 14 au plus près du pivot O donnant une précontrainte faible à ce ressort, puis par une rotation d'un quart de tour dans le sens « + » la position B donnant une précontrainte moyenne à ce ressort, puis par une rotation suivante d'un quart de tour dans le sens « + » la position C donnant une précontrainte forte à ce ressort. The top of the square of the adjustable stop 30 has a central slot 32 allowing the engagement of a screwdriver 34 shown in FIG. 1, in order to turn this stop a quarter turn to the left as shown by the arrow 36 towards a side presenting a marking "-", or on the right as presented by the arrow 38 to a side having a marking "+". Alternatively, the top of the square of the adjustable stop 30 may have a cruciform central recess for the engagement of a Phillips screwdriver. The three active sides of the square of the adjustable stop 30 being at a progressively greater distance from its pivot O, one obtains a rotation of this square successively starting from the position A shown on the right in FIG. 3 after a rotation indicated by FIG. the arrow 36 in the direction "-", a position of the right hooking portion 16 of the spring 14 closest to the pivot O giving a weak preload to this spring, then by a quarter-turn rotation in the direction "+" The position B giving an average prestress to this spring, then by a subsequent rotation of a quarter of a turn in the direction "+" the position C giving a strong prestress to this spring.
En particulier sur l'exemple présenté les positions de la butée réglable 30 donnent entre deux positions successives un écart de position angulaire de la partie d'accrochage 16 du ressort 14 autour de l'arbre 12, variant de 5°. Ces variations de position angulaire permettent entre deux positions un rattrapage de la raideur du ressort 14 compris entre +1-1% et +/-10% suivant la raideur du ressort adaptée à des calibres d'intensité de courant.  In particular in the example shown the positions of the adjustable stop 30 give between two successive positions a difference in angular position of the attachment portion 16 of the spring 14 around the shaft 12, varying by 5 °. These angular position variations allow, between two positions, to compensate for the stiffness of the spring 14 between + 1-1% and +/- 10% depending on the stiffness of the spring adapted to current intensity calibres.
On obtient ainsi un moyen de réglage en atelier précis et simple à mettre en œuvre de l'appareil présentant son capot ouvert, permettant à un opérateur d'effectuer une mesure du niveau de courant réel donnant le seuil de déclenchement de cet appareil entièrement assemblé, puis d'effectuer un réglage du point d'appui du ressort de calibrage 14 en appliquant une des trois positions de la butée réglable 30.  In this way, a precise and easy-to-use control means is obtained for implementing the apparatus having its hood open, enabling an operator to make a measurement of the actual current level giving the tripping threshold of this fully assembled apparatus, and then adjusting the fulcrum of the calibration spring 14 by applying one of the three positions of the adjustable stop 30.
On compense ainsi sans démontage de l'appareil assemblé, pôle par pôle de manière individuelle des écarts de fabrication des différents composants, en particulier ceux du ressort de calibrage 14, ce qui permet de demander des précisions habituelles sur ces composants ce qui réduit les coûts de fabrication.  Thus, without dismantling of the assembled apparatus, the individual pole-by-pole differences in the manufacturing of the various components, in particular those of the calibration spring 14, are compensated without dismantling, which makes it possible to request the usual precisions on these components, which reduces the costs. Manufacturing.
Ce système de butée réglable 30 intégré sur l'arbre 12 est très compact, et peut être facilement ajouté sur un appareil existant sans modifier son encombrement.  This adjustable stop system 30 integrated on the shaft 12 is very compact, and can be easily added to an existing device without changing its size.
On notera que l'utilisation de trois faces du carré de la butée réglable 30 donne par l'appui de la partie droite d'accrochage 16 du ressort 14 sur ces faces, des positions indexées très stables. En variante on pourrait utiliser les quatre faces du carré, ou réaliser une butée comportant un nombre différent de faces d'appui. On peut aussi utiliser une butée réglable comportant un appui du point d'accrochage du ressort 16 donnant une variation continue de la position de ce point d'accrochage. Note that the use of three faces of the square of the adjustable stop 30 gives by the support of the right hooking portion 16 of the spring 14 on these faces, very stable indexed positions. In a variant, the four faces of the square could be used, or a stop having a different number of support faces. It is also possible to use an adjustable stop having a support of the attachment point of the spring 16 giving a continuous variation of the position of this attachment point.

Claims

REVENDICATIONS
1. Appareil de protection de lignes électriques, du type disjoncteur, comportant un arbre (12), un ressort de calibrage (14), au moins un circuit électrique prévu pour passer le courant d'une ligne électrique, une bobine reliée à ce circuit et un noyau mobile (8) attiré par ladite bobine qui se déplace à partir d'un seuil magnétique d'effort, en comprimant le ressort de calibrage (14), le ressort de calibrage (14) présentant des spires enroulées autour de l'arbre (12) et une partie d'accrochage (16) liée à cet arbre (12), pour ouvrir un contact du circuit électrique, caractérisé en ce que l'arbre (12) comporte une butée de réglage (30) recevant l'appui de la partie d'accrochage (16) du ressort (14), présentant plusieurs positions donnant des écarts de positionnement de cette partie d'accrochage. 1. Electrical line protection device, of the circuit breaker type, comprising a shaft (12), a calibration spring (14), at least one electrical circuit designed to pass the current of an electrical line, a coil connected to this circuit and a mobile core (8) attracted by said coil which moves from a magnetic force threshold, compressing the calibration spring (14), the calibration spring (14) having turns wound around the shaft (12) and a hooking part (16) linked to this shaft (12), to open a contact of the electrical circuit, characterized in that the shaft (12) comprises an adjustment stop (30) receiving the support of the hooking part (16) of the spring (14), having several positions giving positioning deviations of this hooking part.
2. Appareil de protection selon la revendication 1, caractérisé en ce que la butée réglable (30) est montée en rotation autour d'un pivot (O), perpendiculaire à l'axe de rotation de l'arbre (12), ladite butée réglable (30) comportant différents côtés d'appui de la partie d'accrochage (16) du ressort (14). 2. Protective device according to claim 1, characterized in that the adjustable stop (30) is mounted to rotate around a pivot (O), perpendicular to the axis of rotation of the shaft (12), said stop adjustable (30) comprising different support sides of the hooking part (16) of the spring (14).
3. Appareil de protection selon la revendication 2, caractérisé en ce que la butée réglable (30) a une forme sensiblement polygonale, de préférence carrée. 3. Protective device according to claim 2, characterized in that the adjustable stop (30) has a substantially polygonal shape, preferably square.
4. Appareil de protection selon la revendication 2 ou 3, caractérisé en ce que les côtés de la butée réglable (30) d'appui de la partie d'accrochage (16) du ressort (14), présentent chacun un creux (40) s'étendant dans une direction essentiellement parallèle à ce côté et prévu pour recevoir cette partie d'accrochage. 4. Protective device according to claim 2 or 3, characterized in that the sides of the adjustable stop (30) supporting the hooking part (16) of the spring (14), each have a hollow (40) extending in a direction essentially parallel to this side and intended to receive this hooking part.
5. Appareil de protection selon l'une quelconque des revendications 2 à 4, caractérisé en ce que la butée réglable (30) comporte une fente (32) permettant son entraînement en rotation à l'aide d'un tournevis (34). 5. Protective device according to any one of claims 2 to 4, characterized in that the adjustable stop (30) has a slot (32) allowing it to rotate using a screwdriver (34).
6. Appareil de protection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'entre deux positions successives de la butée réglable (30), l'écart angulaire de la partie d'accrochage (16) du ressort (14) autour de l'axe de l'arbre (12) est inférieur à 10°. 6. Protective device according to any one of the preceding claims, characterized in that between two successive positions of the adjustable stop (30), the angular distance of the hooking part (16) of the spring (14) around of the axis of the shaft (12) is less than 10°.
7. Appareil de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort (14) et les écarts de positionnement sont déterminés de sorte que, entre deux positions successives de la butée réglable (30), la différence de raideur du ressort (14) est inférieure ou égale à 10%. 7. Protective device according to any one of the preceding claims, characterized in that the spring (14) and the positioning differences are determined so that, between two successive positions of the adjustable stop (30), the difference in stiffness of the spring (14) is less than or equal to 10%.
8. Appareil de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que la butée de réglage (30) comporte un marquage indiquant suivant son sens de déplacement une augmentation ou une diminution du seuil magnétique d'effort. 8. Protective device according to any one of the preceding claims, characterized in that the adjustment stop (30) has a marking indicating, depending on its direction of movement, an increase or decrease in the magnetic force threshold.
9. Appareil de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort (30) comporte deux corps de spires reliés par une partie droite parallèle à l'arbre (12) formant la partie d'accrochage (16) de ce ressort. 9. Protective device according to any one of the preceding claims, characterized in that the spring (30) comprises two bodies of turns connected by a straight part parallel to the shaft (12) forming the hooking part (16) of this jurisdiction.
10. Procédé de réglage d'un appareil de protection de lignes électriques selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une étape de mesure du courant dans le circuit électrique pour le seuil magnétique d'effort, puis si nécessaire une étape de modification de la position de la butée de réglage (30) fixée sur l'arbre (12) recevant l'appui de la partie d'accrochage (16) du ressort (14), pour modifier la précontrainte de ce ressort. 10. Method for adjusting an electrical line protection device according to any one of the preceding claims, characterized in that it comprises a step of measuring the current in the electrical circuit for the magnetic force threshold, then if necessary a step of modifying the position of the adjustment stop (30) fixed on the shaft (12) receiving the support of the hooking part (16) of the spring (14), to modify the preload of this spring .
EP17709128.7A 2016-06-17 2017-02-09 Circuit breaker-type protective apparatus comprising a stop for adjusting the calibration spring Active EP3300533B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1655675A FR3052909B1 (en) 2016-06-17 2016-06-17 CIRCUIT BREAKER TYPE PROTECTION APPARATUS COMPRISING A CALIBRATION SPRING ADJUSTMENT ROD
PCT/FR2017/050289 WO2017216433A1 (en) 2016-06-17 2017-02-09 Circuit breaker-type protective apparatus comprising a stop for adjusting the calibration spring

Publications (2)

Publication Number Publication Date
EP3300533A1 true EP3300533A1 (en) 2018-04-04
EP3300533B1 EP3300533B1 (en) 2019-06-26

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ID=56943709

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Application Number Title Priority Date Filing Date
EP17709128.7A Active EP3300533B1 (en) 2016-06-17 2017-02-09 Circuit breaker-type protective apparatus comprising a stop for adjusting the calibration spring

Country Status (5)

Country Link
EP (1) EP3300533B1 (en)
JP (1) JP7026059B2 (en)
CN (1) CN108780722B (en)
FR (1) FR3052909B1 (en)
WO (1) WO2017216433A1 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT343207B (en) * 1976-08-23 1978-05-10 Felten & Guilleaume Ag Oester ADJUSTMENT DEVICE FOR QUICK RELEASE OF CIRCUIT BREAKERS
US6433659B1 (en) * 2000-03-15 2002-08-13 Eaton Corporation Cam and axle for adjustable magnetic trip device
US6407653B1 (en) * 2000-09-20 2002-06-18 Eaton Corporation Circuit interrupter with a magnetically-induced automatic trip assembly having adjustable armature biasing
US6396373B1 (en) * 2000-12-29 2002-05-28 Square D Company Adjustable armature assembly for a circuit breaker and method of using same
US6667675B2 (en) * 2002-05-01 2003-12-23 Eaton Corporation Adjustable magnetic trip assembly for circuit breaker
JP4419706B2 (en) * 2004-06-24 2010-02-24 富士電機機器制御株式会社 Circuit breaker
JP4906528B2 (en) * 2007-02-01 2012-03-28 三菱電機株式会社 Circuit breaker overcurrent trip device
AT509250A1 (en) * 2008-03-05 2011-07-15 Moeller Gebaeudeautomation Gmbh SWITCHGEAR
US7800466B2 (en) * 2008-05-30 2010-09-21 Eaton Corporation Magnetic trip mechanism and electrical switching apparatus employing the same
KR101206540B1 (en) * 2011-12-28 2012-11-30 현대중공업 주식회사 Instant adjustable trip device of circuit breakers
FR2987164B1 (en) 2012-02-17 2014-03-28 Hager Electro Sas INSTANTANEOUS TRIGGER FOR ELECTRICAL DEVICE FOR PROTECTING LINES OF THE CIRCUIT BREAKER TYPE.
CN203250706U (en) * 2013-04-12 2013-10-23 施耐德电器工业公司 Magnetic tripping mechanism

Also Published As

Publication number Publication date
CN108780722A (en) 2018-11-09
FR3052909A1 (en) 2017-12-22
EP3300533B1 (en) 2019-06-26
JP7026059B2 (en) 2022-02-25
FR3052909B1 (en) 2018-07-13
WO2017216433A1 (en) 2017-12-21
JP2019518312A (en) 2019-06-27
CN108780722B (en) 2020-07-03

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