EP0100699B1 - Multi-phase electric low-tension switch with high electrodynamic strength - Google Patents

Multi-phase electric low-tension switch with high electrodynamic strength Download PDF

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Publication number
EP0100699B1
EP0100699B1 EP19830401328 EP83401328A EP0100699B1 EP 0100699 B1 EP0100699 B1 EP 0100699B1 EP 19830401328 EP19830401328 EP 19830401328 EP 83401328 A EP83401328 A EP 83401328A EP 0100699 B1 EP0100699 B1 EP 0100699B1
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EP
European Patent Office
Prior art keywords
contact
blades
finger
slide
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19830401328
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German (de)
French (fr)
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EP0100699A1 (en
Inventor
Pierre Laffont
Denis Vial
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Merlin Gerin SA
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Merlin Gerin SA
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Publication of EP0100699A1 publication Critical patent/EP0100699A1/en
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    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force

Definitions

  • the invention aims to remedy these drawbacks and allow the production of a switch with high electrodynamic resistance and improved electrical endurance without increasing the size of the housing and the travel of the moving assembly.
  • each of the two knives constituting the clamp has a divided structure with multiple contact points, comprising a first contact finger provided at its opposite ends with two lateral projections, which frame a second contact finger juxtaposed with the first, and that the two projections of the first finger are each provided with a boss located in the same horizontal plane in the vicinity of another boss, arranged at each end of the second finger, each knife being thus equipped four points of contact with the pair of fixed contacts, the latter being arranged to cause a prior separation with the corresponding bosses of the second finger of each knife, at the start of the switch opening stroke, and the final separation with the bosses of the first finger when the slide continues to the open position.
  • the second contact finger of each knife is in the form of a bar housed inside an inverted U of the first contact finger.
  • the entry edge of each fixed contact advantageously has an oblique profile or a structure with notches offset in the direction of movement of the slide.
  • a multi-pole switch 10 with high electrodynamic resistance is shown for controlling and cutting low-voltage circuits.
  • the switch 10 housed in a molded insulating housing 12, comprises a movable assembly formed by a switching slide 14 equipped with a plurality of contact bridges 16 parallel and staggered at regular intervals, the number of bridges 16 corresponding to that of switch poles.
  • the movable slide 14 is arranged in the longitudinal median axis of the housing 12 and is actuated in alternating translation between the open and closed positions by a bidirectional operating mechanism 18 with a rotary handle (not shown).
  • the mechanism 18 coupled to the slide 14 is provided with a conventional toggle system 20 with abrupt passage of neutral position generating an optimal speed of opening and closing of the contacts.
  • Each pole is associated with a contact bridge 16 perpendicular to the slide 14, and cooperating with a pair of fixed contacts 22, 24 spaced apart and symmetrical with respect to the longitudinal central axis.
  • Each pair of fixed contacts 22, 24 is arranged at the internal ends of two conductive blades 26, 28 bearing on two sides pa opposite rows of the insulating housing 12. The outer ends of the blades 26, 28 serve as connection areas 30, 32 of the corresponding pole. All of the blades 26, 28 for supporting the fixed contacts 22, 24 of all the poles lie in the same plane parallel to the bottom of the housing 12, and is distributed in two identical rows arranged on either side of the axis of the slide 14.
  • the contact bridges 16 of the slide 14 are all identical to one another and only one will be described in detail below.
  • Each bridge 16 is of the self-compensated contact type comprising a pair of knives 34, 36 brought together and parallel to each other by extending perpendicular to the longitudinal direction of movement of the slide 14.
  • the pair of knives 34, 36 conductive material constitutes a clip in the form of a double lyre capable of enclosing the two fixed contacts 22, 24 spaced from the corresponding pole during the rectilinear movement of the slide 14 towards the closed position.
  • a device 38 for holding the two knives 34, 36 is arranged in the middle area of the bridge 16, and cooperates with elastic means, in particular springs 40, to ensure a suitable contact pressure.
  • each of the two knives 34, 36 constituting the clamp comprises a divided structure with multiple contact points, equipped with a first contact finger 44 outside with projections 44A, 44B, the assembly being shaped as an inverted U inside which is housed a second internal contact finger 46 juxtaposed in the form of a bar (FIGS. 3 and 4).
  • the opposite ends of the two contact fingers 44, 46 of each knife are cut in a chamfer so as to constitute four bosses 48A, 48B; 50A, 50B, the contact faces of which are located in the same plane.
  • the two bosses 48A, 48B of the external contact finger 44 belonging to the upper knife 34 are arranged opposite the conjugate bosses 48A, 48B of the external contact finger 44 belonging to the lower knife 36.
  • Each movable contact bridge 16 has, in the closed position of the switch, eight points of contact with the pair of fixed contacts 22, 24 of the corresponding pole.
  • the vertical spacing formed between the respective bosses of the two upper and lower knives 34, 36 corresponds substantially to the thickness of the fixed contacts 22, 24. In the closed position, the latter are sandwiched between the bosses of the two knives 34, 36, and each fixed contact 22, 24 has an oblique entry edge 52 cut in a bevel.
  • the flat central parts of the two knives 34, 36 of the bridge 16 are clamped against one another by the device 38 with the interposition of an insulating element 54 ensuring the distribution of the current in the two knives.
  • the holding device 38 for the knives 34, 36 comprises a pair of clamping members 56, 58 each provided with two support blades 60, 62 comprising two hooking pins 64, 66 folded at right angles in opposite directions and bearing on the base of the lower knife 36, one 64 on the internal contact finger 46, and the other 66 on the external contact finger 44.
  • the blades 60, 62 pass vertically through openings 68 aligned in the knives 34, 36 at the level of the separation plane of the contact fingers 44, 46.
  • the blades 60, 62 are equipped with pins 70 cooperating with washers 72 for stopping.
  • Each clamping member 56, 58 is associated with a compression spring 40 interposed between the stop washer 72 and the upper face of the knife 34 opposite the boss contacts. It is noted that the contact pressure spring 40 rests by means of a washer 72a on the two contact fingers 44, 46 juxtaposed constituting the upper knife 34.
  • the presence of the eight contact points per pole allows a reduction in the temperature rise of the switch in nominal operation and therefore allows an increase in size by using the same copper section for the contact members.
  • the electrical endurance of the switch is also improved thanks to the design of the knives 34, 36 and the oblique shape of the input edge 52 of the fixed contacts 22, 24.
  • At the start of the opening stroke (according to the direction of the arrow F) of the slide 14 takes place first of all the separation of the fixed contacts 22, 24 from the corresponding bosses 50A, 50B of the internal contact fingers 46 superimposed on the knives 34 and 36 (fig. 5) .
  • the edge 52 of the fixed contacts 22, 24 remains in contact with the other bosses 48A, 48B of the external contact fingers 44.
  • the closing power on short circuit and the electrodynamic resistance of the switch are also improved thanks to the judi distribution current current in the contact fingers of the knives 34, 36 without requiring an increase in the stroke of the slide 14.

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  • Slide Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

L'invention est relative à un interrupteur électrique multipolaire à basse tension et à haute tenue électrodynamique, logé dans un boîtier en matériau isolant moulé, et comprenant:

  • - un coulisseau de commutation équipé d'une pluralité de ponts de contact 16 dont le nombre correspond à celui des pôles, chaque pont étant perpendiculaire au coulisseau,
  • - un mécanisme de manoeuvre du coulisseau entraîné en translation alternée entre les positions d'ouverture et de fermeture,
  • - une paire de contacts fixes par pôle, agencés aux extrémités internes de deux lames conductrices symétriques par rapport à l'axe de déplacement du coulisseau et prenant appui sur deux faces opposées du boîtier,
  • - chaque pont de contact comportant deux couteaux superposés et parallèles constituant une pince à contacts autocompensés susceptibles de coopérer avec la paire de contacts fixes pour assurer, lors de l'ouverture, une double interruption du courant dans le pôle correspondant.
The invention relates to a low-voltage multipolar electrical switch with high electrodynamic resistance, housed in a casing made of molded insulating material, and comprising:
  • a switching slide equipped with a plurality of contact bridges 16, the number of which corresponds to that of the poles, each bridge being perpendicular to the slide,
  • - a mechanism for operating the slide driven in alternating translation between the open and closed positions,
  • - a pair of fixed contacts per pole, arranged at the internal ends of two conductive blades symmetrical with respect to the axis of movement of the slide and bearing on two opposite faces of the housing,
  • - Each contact bridge comprising two superimposed and parallel knives constituting a clamp with self-compensating contacts capable of cooperating with the pair of fixed contacts to ensure, during opening, a double interruption of the current in the corresponding pole.

Un tel interrupteur de l'art antérieur est décrit dans le document FR-A-1.472.630 dans lequel chaque pont de contact mobile est constitué par deux conducteurs parallèles en forme de lames de faible épaisseur. Chaque conducteur du pont est parcouru en position de fermeture par la moitié du courant traversant chaque pôle, et présente deux points de contact avec la paire de contacts fixes correspondants. Ce type d'interrupteur est approprié pour les bas calibres, mais pose des problèmes pour de fortes intensités, notamment supérieures à 400 A. Ces problèmes consistent essentiellement en:

  • - un échauffement important aux points de contact, nécessitant une augmentation de la section des lames en cuivre;
  • - une endurance électrique réduite résultant d'une dégradation rapide des couteaux;
  • - une fermeture incomplète sur court-circuit due aux efforts électrodynamiques importants (attraction et répulsion) entre les lames du pont.
Such a switch of the prior art is described in the document FR-A-1,472,630 in which each movable contact bridge is constituted by two parallel conductors in the form of thin blades. Each conductor of the bridge is traversed in the closed position by half of the current passing through each pole, and has two points of contact with the pair of corresponding fixed contacts. This type of switch is suitable for low ratings, but poses problems for high intensities, in particular greater than 400 A. These problems essentially consist of:
  • - significant heating at the contact points, requiring an increase in the section of the copper blades;
  • - reduced electrical endurance resulting from rapid degradation of the knives;
  • - incomplete closing on short circuit due to significant electrodynamic forces (attraction and repulsion) between the deck blades.

L'invention a pour but de remédier à ces inconvénients et de permettre la réalisation d'un interrupteur à haute tenue électrodynamique et à endurance électrique améliorée sans augmenter l'encombrement du boîtier et la course de l'équipage mobile.The invention aims to remedy these drawbacks and allow the production of a switch with high electrodynamic resistance and improved electrical endurance without increasing the size of the housing and the travel of the moving assembly.

L'interrupteur selon l'invention est caractérisé par le fait que chacun des deux couteaux constitutifs de la pince présente une structure divisée à points de contact multiples, comprenant un premier doigt de contact doté à ses extrémités opposées de deux saillies latérales, qui encadrent un deuxième doigt de contact juxtaposé au premier, et que les deux saillies du premier doigt sont munies chacune d'un bossage situé dans un même plan horizontal au voisinage d'un autre bossage, disposé à chaque extrémité du deuxième doigt, chaque couteau étant ainsi équipé de quatre points de contact avec la paire de contacts fixes, ces derniers étant agencés pour provoquer une séparation préalable avec les bossages correspondants du deuxième doigt de chaque couteau, au début de la course d'ouverture de l'interrupteur, et la séparation définitive avec les bossages du premier doigt lors de la course poursuivie du coulisseau vers la position d'ouverture.The switch according to the invention is characterized in that each of the two knives constituting the clamp has a divided structure with multiple contact points, comprising a first contact finger provided at its opposite ends with two lateral projections, which frame a second contact finger juxtaposed with the first, and that the two projections of the first finger are each provided with a boss located in the same horizontal plane in the vicinity of another boss, arranged at each end of the second finger, each knife being thus equipped four points of contact with the pair of fixed contacts, the latter being arranged to cause a prior separation with the corresponding bosses of the second finger of each knife, at the start of the switch opening stroke, and the final separation with the bosses of the first finger when the slide continues to the open position.

Le dédoublement des points de contact et la répartition du courant nominal dans les doigts de chaque couteau entraînent une diminution de l'échauffement pour une même section de cuivre. Les efforts électrodynamiques par attraction et répulsion sont réduits, autorisant une fermeture sur court-circuit et une bonne tenue électrodynamique sans augmenter l'effort moteur du mécanisme de manoeuvre.The splitting of the contact points and the distribution of the nominal current in the fingers of each knife lead to a reduction in the temperature rise for the same copper section. The electrodynamic forces by attraction and repulsion are reduced, allowing a short-circuit closure and good electrodynamic resistance without increasing the motor force of the operating mechanism.

Le deuxième doigt de contact de chaque couteau est en forme de barreau logé à l'intérieur d'un U renversé du premier doigt de contact. L'arête d'entrée de chaque contact fixe possède avantageusement un profil oblique ou une structure à crans décalés dans le sens de déplacement du coulisseau.The second contact finger of each knife is in the form of a bar housed inside an inverted U of the first contact finger. The entry edge of each fixed contact advantageously has an oblique profile or a structure with notches offset in the direction of movement of the slide.

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

  • - la fig. 1 est une vue en coupe transversale selon la ligne I-I de la fig. 2 d'un interrupteur selon l'invention;
  • - la fig. 2 est une vue en plan de la fig. 1 ;
  • - la fig. 3 montre une vue éclatée en perspective d'un pont de contact mobile selon l'invention;
  • - la fig. 4 est une vue en plan du pont de la fig. 3, représenté en position assemblée;
  • - les fig. 5 et 6 montrent des vues partielles d'un pôle de la fig. 2 respectivement au début de la course d'ouverture de l'interrupteur, et pendant la phase d'interruption du courant.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and shown in the appended drawings, in which:
  • - fig. 1 is a cross-sectional view along line II of FIG. 2 of a switch according to the invention;
  • - fig. 2 is a plan view of FIG. 1;
  • - fig. 3 shows an exploded perspective view of a movable contact bridge according to the invention;
  • - fig. 4 is a plan view of the bridge of FIG. 3, shown in the assembled position;
  • - figs. 5 and 6 show partial views of a pole of FIG. 2 respectively at the start of the switch opening stroke, and during the current interruption phase.

Sur les fig. 1 et 2 est représenté un interrupteur 10 multipolaire à haute tenue électrodynamique pour la commande et le sectionnement des circuits à basse tension. L'interrupteur 10, logé dans un boîtier 12 isolant moulé, comporte un équipage mobile formé par un coulisseau 14 de commutation équipé d'une pluralité de ponts de contact 16 parallèles et échelonnés à intervalles réguliers, le nombre de ponts 16 correspondant à celui des pôles de l'interrupteur. Le coulisseau 14 mobile est agencé dans l'axe médian longitudinal du boîtier 12 et est actionné à translation alternée entre les positions d'ouverture et de fermeture par un mécanisme de manoeuvre 18 bidirectionnel à poignée rotative (non représentée). Le mécanisme 18 accouplé au coulisseau 14 est doté d'un système classique à genouillère 20 à passage brusque de point mort engendrant une vitesse optimale d'ouverture et de fermeture des contacts.In fig. 1 and 2 a multi-pole switch 10 with high electrodynamic resistance is shown for controlling and cutting low-voltage circuits. The switch 10, housed in a molded insulating housing 12, comprises a movable assembly formed by a switching slide 14 equipped with a plurality of contact bridges 16 parallel and staggered at regular intervals, the number of bridges 16 corresponding to that of switch poles. The movable slide 14 is arranged in the longitudinal median axis of the housing 12 and is actuated in alternating translation between the open and closed positions by a bidirectional operating mechanism 18 with a rotary handle (not shown). The mechanism 18 coupled to the slide 14 is provided with a conventional toggle system 20 with abrupt passage of neutral position generating an optimal speed of opening and closing of the contacts.

A chaque pôle est associé un pont de contact 16 perpendiculaire au coulisseau 14, et coopérant avec une paire de contacts fixes 22, 24 espacés et symétriques par rapport à l'axe médian longitudinal. Chaque paire de contacts fixes 22, 24 est agencée aux extrémités internes de deux lames 26, 28 conductrices prenant appui sur deux faces parallèles opposées du boîtier 12 isolant. Les extrémités externes des lames 26, 28 servent de plages de raccordement 30, 32 du pôle correspondant. La totalité des lames 26, 28 de support des contacts fixes 22, 24 de tous les pôles se trouve dans un même plan parallèle au fond du boîtier 12, et est répartie selon deux rangées identiques disposées de part et d'autre de l'axe du coulisseau 14. Les ponts de contact 16 du coulisseau 14 sont tous identiques entre eux et un seul sera décrit en détail par la suite. Chaque pont 16 est du type à contacts autocompensés comprenant une paire de couteaux 34, 36 rapprochés et parallèles l'un à l'autre en s'étendant perpendiculairement à la direction longitudinale de déplacement du coulisseau 14. La paire de couteaux 34, 36 en matériau conducteur constitue une pince en forme de double lyre susceptible d'enserrer les deux contacts fixes 22, 24 espacés du pôle correspondant lors du déplacement rectiligne du coulisseau 14 vers la position de fermeture. Un dispositif de maintien 38 des deux couteaux 34, 36 est agencé dans la zone médiane du pont 16, et coopère avec des moyens élastiques, notamment des ressorts 40, pour assurer une pression de contact convenable.Each pole is associated with a contact bridge 16 perpendicular to the slide 14, and cooperating with a pair of fixed contacts 22, 24 spaced apart and symmetrical with respect to the longitudinal central axis. Each pair of fixed contacts 22, 24 is arranged at the internal ends of two conductive blades 26, 28 bearing on two sides pa opposite rows of the insulating housing 12. The outer ends of the blades 26, 28 serve as connection areas 30, 32 of the corresponding pole. All of the blades 26, 28 for supporting the fixed contacts 22, 24 of all the poles lie in the same plane parallel to the bottom of the housing 12, and is distributed in two identical rows arranged on either side of the axis of the slide 14. The contact bridges 16 of the slide 14 are all identical to one another and only one will be described in detail below. Each bridge 16 is of the self-compensated contact type comprising a pair of knives 34, 36 brought together and parallel to each other by extending perpendicular to the longitudinal direction of movement of the slide 14. The pair of knives 34, 36 conductive material constitutes a clip in the form of a double lyre capable of enclosing the two fixed contacts 22, 24 spaced from the corresponding pole during the rectilinear movement of the slide 14 towards the closed position. A device 38 for holding the two knives 34, 36 is arranged in the middle area of the bridge 16, and cooperates with elastic means, in particular springs 40, to ensure a suitable contact pressure.

Le fonctionnement d'un tel interrupteur est bien connu des spécialistes et il suffit de rappeler que l'actionnement par le mécanisme 18 du coulisseau 14 vers la position d'ouverture engendre une double interruption du courant par pôle. L'extinction des deux arcs en série est facilitée au moyen d'une chambre d'extinction par intervalle de coupure, chaque chambre comprenant au moins une ou deux tôles 42 métalliques de désionisation de l'arc. La pression de contact normalement assurée par les moyens élastiques est renforcée en cas de court-circuit grâce au phénomène d'autocompen- sation dû à l'attraction électrodynamique s'exerçant entre les contacts à couteaux 34, 36 parallèles du pont 16 parcourus par des courants de même sens, l'intensité du courant dans chaque couteau étant égale à la moitié du courant total traversant le pôle correspondant.The operation of such a switch is well known to specialists and it suffices to recall that the actuation by the mechanism 18 of the slide 14 towards the open position generates a double interruption of the current per pole. The extinction of the two arcs in series is facilitated by means of an extinction chamber by cut-off interval, each chamber comprising at least one or two metal sheets 42 for deionizing the arc. The contact pressure normally provided by the elastic means is reinforced in the event of a short circuit thanks to the self-compensating phenomenon due to the electrodynamic attraction exerted between the knife contacts 34, 36 parallel to the bridge 16 traversed by currents in the same direction, the intensity of the current in each knife being equal to half of the total current passing through the corresponding pole.

Selon l'invention, chacun des deux couteaux 34,36 constitutifs de la pince comprend une structure divisée à points de contact multiples, équipée d'un premier doigt de contact 44 extérieur à saillies 44A, 44B, l'ensemble étant conformé en U renversé à l'intérieur duquel est logé un deuxième doigt de contact 46 interne juxtaposé en forme de barreau (fig. 3 et 4). Les extrémités opposées des deux doigts de contact 44, 46 de chaque couteau sont taillées en chanfrein de manière à constituer quatre bossages 48A, 48B; 50A, 50B, dont les faces de contact sont situées dans un même plan. Les deux bossages 48A, 48B du doigt de contact 44 extérieur appartenant au couteau 34 supérieur sont disposés en face des bossages conjugués 48A, 48B du doigt de contact 44 extérieur appartenant au couteau 36 inférieur. Il en est de même pour les autres bossages 50A, 50B respectifs des deux doigts de contact 46 internes des couteaux 34, 36. Chaque pont de contact 16 mobile présente, en position de fermeture de l'interrupteur, huit points de contact avec la paire de contacts fixes 22, 24 du pôle correspondant. L'écartement vertical ménagé entre les bossages respectifs des deux couteaux supérieur et inférieur 34, 36 correspond sensiblement à l'épaisseur des contacts fixes 22, 24. En position de fermeture, ces derniers sont pris en sandwich entre les bossages des deux couteaux 34, 36, et chaque contact fixe 22, 24 présente une arête 52 d'entrée oblique taillée en biseau.According to the invention, each of the two knives 34, 36 constituting the clamp comprises a divided structure with multiple contact points, equipped with a first contact finger 44 outside with projections 44A, 44B, the assembly being shaped as an inverted U inside which is housed a second internal contact finger 46 juxtaposed in the form of a bar (FIGS. 3 and 4). The opposite ends of the two contact fingers 44, 46 of each knife are cut in a chamfer so as to constitute four bosses 48A, 48B; 50A, 50B, the contact faces of which are located in the same plane. The two bosses 48A, 48B of the external contact finger 44 belonging to the upper knife 34 are arranged opposite the conjugate bosses 48A, 48B of the external contact finger 44 belonging to the lower knife 36. It is the same for the other bosses 50A, 50B respectively of the two internal contact fingers 46 of the knives 34, 36. Each movable contact bridge 16 has, in the closed position of the switch, eight points of contact with the pair of fixed contacts 22, 24 of the corresponding pole. The vertical spacing formed between the respective bosses of the two upper and lower knives 34, 36 corresponds substantially to the thickness of the fixed contacts 22, 24. In the closed position, the latter are sandwiched between the bosses of the two knives 34, 36, and each fixed contact 22, 24 has an oblique entry edge 52 cut in a bevel.

Les parties centrales planes des deux couteaux 34, 36 du pont 16 sont serrées l'une contre l'autre par le dispositif 38 avec interposition d'un élément isolant 54 assurant la répartition du courant dans les deux couteaux. Le dispositif de maintien 38 des couteaux 34, 36 comporte une paire d'organes de serrage 56, 58 pourvus chacun de deux lames- supports 60, 62 comprenant deux ergots d'accrochage 64, 66 repliés à angle droit en sens inverse et prenant appui sur la base du couteau inférieur 36, l'un 64 sur le doigt de contact interne 46, et l'autre 66 sur le doigt de contact externe 44. Les lames 60, 62 traversent verticalement des ouvertures 68 alignées ménagées dans les couteaux 34, 36 au niveau du plan de séparation des doigts de contact 44, 46. A l'opposé des ergots 64, 66, les lames 60,62 sont équipées de tenons 70 coopérant avec des rondelles 72 d'arrêt. A chaque organe de serrage 56, 58 est associé un ressort de compression 40 intercalé entre la rondelle 72 d'arrêt et la face supérieure du couteau 34 à l'opposé des contacts à bossages. On remarque que le ressort de pression de contact 40 repose par l'intermédiaire d'une rondelle 72a sur les deux doigts de contact 44, 46 juxtaposés constitutifs du couteau 34 supérieur.The flat central parts of the two knives 34, 36 of the bridge 16 are clamped against one another by the device 38 with the interposition of an insulating element 54 ensuring the distribution of the current in the two knives. The holding device 38 for the knives 34, 36 comprises a pair of clamping members 56, 58 each provided with two support blades 60, 62 comprising two hooking pins 64, 66 folded at right angles in opposite directions and bearing on the base of the lower knife 36, one 64 on the internal contact finger 46, and the other 66 on the external contact finger 44. The blades 60, 62 pass vertically through openings 68 aligned in the knives 34, 36 at the level of the separation plane of the contact fingers 44, 46. In contrast to the lugs 64, 66, the blades 60, 62 are equipped with pins 70 cooperating with washers 72 for stopping. Each clamping member 56, 58 is associated with a compression spring 40 interposed between the stop washer 72 and the upper face of the knife 34 opposite the boss contacts. It is noted that the contact pressure spring 40 rests by means of a washer 72a on the two contact fingers 44, 46 juxtaposed constituting the upper knife 34.

La présence des huit points de contact par pôle permet une réduction de l'échauffement de l'interrupteur en fonctionnement nominal et autorise de ce fait une augmentation de calibre en utilisant la même section de cuivre pour les organes de contact. L'endurance électrique de l'interrupteur est également améliorée grâce à la conception des couteaux 34, 36 et à la forme oblique de l'arête d'entrée 52 des contacts fixes 22, 24. Au début de la course d'ouverture (selon le sens de la flèche F) du coulisseau 14 s'opère en premier lieu la séparation des contacts fixes 22, 24 d'avec les bossages 50A, 50B correspondants des doigts de contact internes 46 superposés des couteaux 34 et 36 (fig. 5). L'arête 52 des contacts fixes 22, 24 reste en contact avec les autres bossages 48A, 48B des doigts de contact 44 extérieurs. La séparation intervient ultérieurement lors de la course poursuivie du coulisseau 14 vers la position d'ouverture, et il en résulte deux arcs tirés respectivement entre les bossages 48A, 48B des doigts extérieurs 44 et les contacts fixes 22,24 (fig. 6). La présence des tôles 42 de désionisation assure une extinction rapide des arcs. On remarque que les deux doigts de contact 46 internes des couteaux 34, 36 servent uniquement au passage d'une partie du courant nominal en position de fermeture de l'interrupteur, mais ne sont pas concernés par la coupure lors de l'ouverture de l'appareil.The presence of the eight contact points per pole allows a reduction in the temperature rise of the switch in nominal operation and therefore allows an increase in size by using the same copper section for the contact members. The electrical endurance of the switch is also improved thanks to the design of the knives 34, 36 and the oblique shape of the input edge 52 of the fixed contacts 22, 24. At the start of the opening stroke (according to the direction of the arrow F) of the slide 14 takes place first of all the separation of the fixed contacts 22, 24 from the corresponding bosses 50A, 50B of the internal contact fingers 46 superimposed on the knives 34 and 36 (fig. 5) . The edge 52 of the fixed contacts 22, 24 remains in contact with the other bosses 48A, 48B of the external contact fingers 44. The separation occurs later during the continued stroke of the slide 14 towards the open position, and this results in two arcs drawn respectively between the bosses 48A, 48B of the outer fingers 44 and the fixed contacts 22,24 (fig. 6). The presence of the deionization plates 42 ensures rapid extinction of the arcs. Note that the two internal contact fingers 46 of the knives 34, 36 are used only for the passage of part of the nominal current in the closed position of the switch, but are not affected by the cut when opening the 'apparatus.

Le pouvoir de fermeture sur court-circuit et la tenue électrodynamique de l'interrupteur sont également améliorés grâce à la répartition judicieuse du courant dans les doigts de contact des couteaux 34, 36 sans nécessiter une augmentation de la course du coulisseau 14.The closing power on short circuit and the electrodynamic resistance of the switch are also improved thanks to the judi distribution current current in the contact fingers of the knives 34, 36 without requiring an increase in the stroke of the slide 14.

Claims (6)

1. A multipolar low voltage electrical interrupter and having a high electrodynamic level, accommodated in a molded insulating housing, and comprising:
- a switching slide (14) fitted up with a plurality of contact bridges (16), the number of which corresponding to the number of poles, each contact bridge (16) being perpendicular to the slide (14),
- an operating mechanism (18) of the slide (14), drawn in alternate translation between the opening and closing positions,
- a pair of stationary contacts (22, 24) by pole, provided at the internal extremes of two conducting blades (26, 28), symmetrical in respect to the moving axis of the slide (14) and being supported on two opposite faces of the housing (12),
- each contact bridge (16) comprising two blades (34, 36) superposed and parallel, constituting a contact clamp, having self-compensated contacts capable of co-operating with the pair of stationary contacts (22, 24) to ensure, when the opening occurs, a double interruption of the current in the corresponding pole, characterized in that each of the two blades (34, 36) constituting the clamp has a divided structure with different contact points comprising a first contactfinger (44) having to its opposite extremes two lateral projections (44A, 44B), which surround a second contact finger (46) juxtaposed to the first and that the two projections (44A, 44B) of the first finger (44) are each of them provided with a lug (48A, 48B) situated on a same horizontal level, near an other lug (50A, 50B) set at each extremity of the second finger (46) each blade (34, 36) being equipped thus with four contact points with the pair of stationary contacts (22, 24), these latest being arranged in order to provoke a previous separation with the corresponding lugs (50A, 50B) of the second finger (46) of each blade (34, 36), at the beginning of the opening of the interrupter, and the ultimate separation with the lugs (48A, 48B) of the first finger (44), when the slide (14) carries on running towards the opening position.
2. Interrupter according to claim 1, characterized in that the second contact finger (46) of each blade (34, 36) is bar shaped, accomodated inside a reverse U of the first contact finger (44).
3. Interrupter according to claim 1 or 2, characterized in that the opening edge (52) of each stationary contact (22, 24) has an oblique profile or with altered steps in the direction of moving of the slide (14) to ensure said previous separation with the lugs (50A, 50B).
4. Interrupter according to anyone of the claims 1 to 3, comprising a holding device (38) of the superior blades (34) and inferior blades (36) of each clamp, characterized in that the holding device (38) is composed of a pair of clamping components (56, 58) comprising each a pressure spring (40) thread on a system of mechanical connection between the two blades (34, 36) and bearing on the superior face of the two contact fingers (44, 46) of one of the blades, for example the superior blade (34).
5. Interrupter according to claim 4, characterized in that the system of mechanical connection of each clamping component comprises two vertical plates (60, 62) each of them equipped with a latch lug (64,66) bearing on the basis of the inferior blade (36), one of them on the second contactfinger (46), the other (66) on the first contact finger (44) and thatthe two juxtaposed blades (60, 62) cross alined openings (68) of the blades (34, 36), on the level of the vertical plane of separation of the contact fingers (44, 46) and are equipped with tongues (70) co-operating with stopping collars (72) of said spring (40).
6. Interrupteraccordingtooneoftheclaims1 1 to 5, characterized in that the lug (48A, 48B) of the first contact finger (44) of each blade (34,36) has a contact surface higher than the one of the lug (50A, 50B) of the second contact finger (46).
EP19830401328 1982-07-13 1983-06-28 Multi-phase electric low-tension switch with high electrodynamic strength Expired EP0100699B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8212530 1982-07-13
FR8212530A FR2530373A1 (en) 1982-07-13 1982-07-13 LOW VOLTAGE, HIGH ELECTRODYNAMIC ELECTRO-VOLTAGE MULTIPOLAR ELECTRIC SWITCH

Publications (2)

Publication Number Publication Date
EP0100699A1 EP0100699A1 (en) 1984-02-15
EP0100699B1 true EP0100699B1 (en) 1986-04-02

Family

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Application Number Title Priority Date Filing Date
EP19830401328 Expired EP0100699B1 (en) 1982-07-13 1983-06-28 Multi-phase electric low-tension switch with high electrodynamic strength

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EP (1) EP0100699B1 (en)
DE (1) DE3362778D1 (en)
ES (1) ES8403664A1 (en)
FR (1) FR2530373A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638018B1 (en) * 1988-10-17 1990-11-30 Merlin Gerin CONTROL MECHANISM FOR HIGH CALIBER MULTIPOLAR ELECTRIC SWITCH
FR2638017B1 (en) * 1988-10-17 1990-11-30 Merlin Gerin LOW VOLTAGE MULTIPOLAR ELECTRIC SWITCH FOR HIGH CALIBERS
FR2753563B1 (en) * 1996-09-16 1998-10-16 Schneider Electric Sa MULTIPOLAR ELECTRIC SWITCH HAVING AN ELEMENTAL SWITCHING BAR BY POLE
FR2795858B1 (en) * 1999-07-01 2001-09-14 Schneider Electric Ind Sa ELECTRICAL SWITCHING APPARATUS HAVING A CONTACT MEMBER PROVIDED WITH A SPARK BARRIER
NL1015585C2 (en) * 2000-07-03 2002-01-04 Holec Holland Nv Switch with auxiliary and main contacts.
FR3003392B1 (en) 2013-03-15 2016-07-22 Schneider Electric Ind Sas UNIT SWITCHING BLOCK AND SWITCHING DEVICE COMPRISING AT LEAST ONE BLOCK
ES2716168T3 (en) * 2016-02-29 2019-06-10 Woehner Gmbh & Co Kg Elektrotechnische Systeme Switching contact arrangement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6603789U (en) * 1961-06-20 1969-11-06 Bbc Brown Boveri & Cie ELECTRIC SWITCH WITH ELECTRODYNAMIC CONTACT PRESSURE REINFORCEMENT
DE1197160B (en) * 1962-10-30 1965-07-22 Bbc Brown Boveri & Cie Electric switch
DE1256294B (en) * 1964-11-13 1967-12-14 Asea Ab Busbar disconnector
FR1472630A (en) * 1965-04-14 1967-03-10 Hazemeijer Co Advanced switching device
DE2833497C2 (en) * 1978-07-31 1983-03-10 Brown, Boveri & Cie Ag, 6800 Mannheim Electrical load switch for low-voltage systems
DE3027598A1 (en) * 1980-07-21 1982-02-18 Siemens AG, 1000 Berlin und 8000 München Compact breaker switch with small operating stoke - has line of contact between contact blades aligned at angle to direction of stroke

Also Published As

Publication number Publication date
ES523808A0 (en) 1984-04-01
EP0100699A1 (en) 1984-02-15
FR2530373A1 (en) 1984-01-20
ES8403664A1 (en) 1984-04-01
FR2530373B1 (en) 1984-12-14
DE3362778D1 (en) 1986-05-07

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