EP1213730B1 - Improvements to electrical swith devices - Google Patents

Improvements to electrical swith devices Download PDF

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Publication number
EP1213730B1
EP1213730B1 EP01403122A EP01403122A EP1213730B1 EP 1213730 B1 EP1213730 B1 EP 1213730B1 EP 01403122 A EP01403122 A EP 01403122A EP 01403122 A EP01403122 A EP 01403122A EP 1213730 B1 EP1213730 B1 EP 1213730B1
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EP
European Patent Office
Prior art keywords
knives
fact
shaft
contacts
mobile
Prior art date
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Expired - Lifetime
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EP01403122A
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German (de)
French (fr)
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EP1213730A1 (en
Inventor
Paul Coquaz
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Pommier and Cie SA
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Pommier and Cie SA
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Publication of EP1213730A1 publication Critical patent/EP1213730A1/en
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    • 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
    • H01H1/42—Knife-and-clip 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

Definitions

  • the present invention relates to the field of electrical switching devices.
  • the present invention applies in particular, although not exclusively, to electrical cut-off devices comprising rotating mobile contacts.
  • the movable contacts 40 are generally formed of a clamp consisting of two parallel knives 42, 44, urged closer by spring blades 46, 48 whose middle part is supported on the drive shaft 30, while its ends rest on the knives 42, 44 near their ends.
  • the document US 5,969,308 describes a device according to the preamble of claim 1.
  • the present invention now aims to improve the existing known devices.
  • the electric breaking device according to the present invention is placed in a housing not shown in the accompanying figures to simplify the illustration.
  • This housing can be the object of any appropriate embodiment as to its geometry and its constituent material.
  • the cut-off device comprises a shaft 300 rotatably mounted about its longitudinal axis 302.
  • the shaft 300 is advantageously made of electrically insulating thermoplastic material.
  • the shaft 300 can in itself be the subject of many variants. Its structure will not be described in detail later.
  • the shaft 300 can be rotated about the axis 302, manually or by any appropriate automation.
  • the drive means of the shaft 300 known in themselves, will not be described later.
  • the shaft 300 carries at least one set of movable contacts 400 intended to cooperate with at least two fixed contacts supported by the inner surface of the housing.
  • the fixed contacts may be known in themselves, for example of the type illustrated in FIG. figure 1 under the reference 20. They will therefore not be described in detail later.
  • the shaft 300 preferably carries at least three sets of movable contacts 400 distributed axially along its length (two such sets of movable contacts 400 are thus schematically illustrated on the figure 7 ).
  • the shaft 300 carries four sets of movable contacts 400, especially in the case of two-phase systems.
  • Each set of movable contacts 400 comprises two parallel knives 420 and 440 urged together by elastic means 500.
  • the two knives 420, 440 are of identical structure and arranged symmetrically one facing each other.
  • each knife 420 and 440 is perforated longitudinally at each end.
  • each knife 420, 440 is provided with two longitudinal notches 421, 422, 441, 442 which open on their longitudinal ends.
  • each knife 420, 440 consists of two parallel blades 423, 424, 443, 444 interconnected in the middle part by a bridge 425, 445.
  • the knives 420, 440 are made of an electrically conductive material. It is preferably a relatively rigid metal, such as silver copper.
  • the knives 420 and 440 are arranged in a generally radial orientation relative to the axis 302 of the shaft 300. More specifically, the knives 420, 440 are disposed in cavities 310, 320 formed in the shaft 300. Thus, the knives 420, 440 through the shaft 300 and emerge on either side thereof to cooperate with the fixed contacts 20. More precisely, as seen on the figure 8 , the two knives 420, 440 are respectively disposed in a cavity 310, 320 passing through the shaft 300 in a radial direction.
  • the two cavities 310, 320 are thus separated by an intermediate element or radial membrane 330 which serves to support the knife 420, 440 in the open position of the cut-off device.
  • the membrane 330 may itself be perforated.
  • the axial dimension of the cavities 310, 320 that is to say the dimension of these cavities considered parallel to the axis 302 must be greater than the thickness of the knives 420, 440 to allow a movement of these in the cavities 310, 320 when the cut-off device is moved from the closed position to the open position or vice versa.
  • the elastic means 500 consist of two springs 510, generally W-shaped, respectively disposed on each end of the knives 420, 440.
  • each pair of knives 420, 440 is associated with four springs 510 W-shaped.
  • each spring 510 has a V-shaped median portion 512 extended respectively on either side by two ends 514, 516 in the general shape of C.
  • the springs 510 thus have a constant section over their entire length.
  • the median portion 512 V-shaped gives each spring 510 an elastic effect.
  • the ends C 514, 516 have the function of at least partially surrounding a respective blade 423, 424, 443, 444 of a knife 420, 440 as seen on the figure 3 .
  • the springs 510 prohibit free spacing of the knives 420, 440.
  • each spring 510 is disposed at least partially in a recess or recess 402 formed in each blade 423, 424, 443, 444 (such a recess 402 is visible for example on the figure 6 ).
  • the engagement of the springs 510 in the recess 402 prohibits a relative longitudinal shift between the spring 510 and the associated knife 420 or 440.
  • each spring 510 comprises two coplanar planar sections 520, 522 interconnected by two ribs 524, 526 forming the above-mentioned elastic V 512. This defines a concavity directed towards the outside of W.
  • the two base sections 520, 522 are further extended respectively by two sections 528, 530 parallel to each other and respectively perpendicular to the base sections 520, 522.
  • sections 528, 530 delimit the ends of the spring W.
  • these two end sections 528, 530 are themselves extended by returns 529, 531 parallel to the base section 520, 522 and perpendicular to the sections 528, 530.
  • the returns 529, 531 are directed towards each other, towards the inside of the W.
  • the width of the sections 528, 530 is greater than the width of each blade 421, 423, 441, 443, as can be seen in FIG. figure 3 .
  • the V 512 is disposed between the two knives 420, 440, the base walls 520, 522 being oriented parallel to the axis 302 facing the intermediate wall 330 of the shaft.
  • the base sections 520, 522 are thus arranged on the outside of the knives 420, 440, the returns 529, 531 penetrating into the longitudinal notches 421, 422, 441, 442.
  • end sections 528, 530 are positioned in the recesses 402, which are formed, as shown in the accompanying figures, on the outer surfaces of the knives 420, 440.
  • each shaft 300 is equipped with at least three sets of movable contacts 400 for respectively cutting one of the phases of a three-phase system.
  • the shaft 300 may be equipped with a fourth set of movable contacts 400 to cut the ground line as indicated above.
  • the springs 510 may be made of any suitable elastic material, preferably of metal, for example based on beryllium bronze.
  • the present invention can notably be used in cut-off devices in which the drive shaft 300 is not rotatably mounted, but in translation.
  • each set of movable contacts 400 cooperates with two fixed contacts 20.
  • the invention can also find application in cut-off devices in which each set of mobile contacts 400 cooperates with a single fixed contact 20.
  • the present invention may find application in any type of switch, disconnector, in particular for the high and / or low voltage cutoff, in particular for an underground cutoff device.
  • the present invention is not limited to this field and also covers air cutoff devices.
  • the present invention notably makes it possible to obtain high performances during closures on a short circuit

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  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Electronic Switches (AREA)
  • Slide Switches (AREA)
  • Keying Circuit Devices (AREA)

Abstract

The circuit breaking mechanism has fixed contacts, an engagement shaft (300) and moving contacts (400). The moving contacts have two parallel knife sections (420,440). Flexible contact is formed by a flexible grip (500) on the contact arms whilst maintaining mechanical decoupling. Moving the engagement shaft closes the knife section onto the fixed contact.

Description

La présente invention concerne le domaine des dispositifs de coupure électrique.The present invention relates to the field of electrical switching devices.

La présente invention s'applique notamment, bien que non exclusivement, aux dispositifs de coupure électrique comprenant des contacts mobiles rotatifs.The present invention applies in particular, although not exclusively, to electrical cut-off devices comprising rotating mobile contacts.

On connaît notamment des dispositifs de coupure du type illustré schématiquement sur la figure 1 annexée, selon une vue partielle en coupe axiale longitudinale, comprenant un boîtier 10 qui loge plusieurs jeux de contacts fixes 20, un arbre d'entraînement rotatif 30 et plusieurs jeux de contacts mobiles 40 liés à l'arbre d'entraînement 30, de sorte que lors du déplacement en rotation de l'arbre 30, alternativement les contacts mobiles 40 relient les contacts fixes 20 entre eux ou sont séparés de ceux-ci.Known cut-off devices of the type illustrated schematically on the figure 1 appended, in a partial view in longitudinal axial section, comprising a housing 10 which houses a plurality of sets of stationary contacts 20, a rotary drive shaft 30 and a plurality of sets of movable contacts 40 connected to the drive shaft 30, so that that during the rotational movement of the shaft 30, alternatively the movable contacts 40 connect the fixed contacts 20 between them or are separated therefrom.

On trouvera un descriptif d'un tel dispositif dans les documents FR 2 628 258 , DE 31 31351 , DE 1197 160 , DE 1 293 279 , EP 0 199 044 , EP 0 485 306 , EP 296 915 , US 3 632 935 et US 3 646 284 .A description of such a device can be found in the documents FR 2,628,258 , DE 31 31351 , DE 1197 160 , DE 1 293 279 , EP 0 199 044 , EP 0 485 306 , EP 296 915 , US 3,632,935 and US 3,646,284 .

Plus précisément, comme décrit par exemple dans le document EP 0 485 306 , dans les dispositifs de ce type utilisés de nos jours, les contacts mobiles 40 sont généralement formés d'une pince constituée de deux couteaux parallèles 42, 44, sollicités en rapprochement par des lames ressort 46, 48 dont la partie médiane prend appui sur l'arbre d'entraînement 30, tandis que ses extrémités reposent sur les couteaux 42, 44 à proximité de leurs extrémités. Le document US 5 969 308 décrit un dispositif selon le préambule de la revendication 1.More specifically, as described for example in the document EP 0 485 306 , in devices of this type used today, the movable contacts 40 are generally formed of a clamp consisting of two parallel knives 42, 44, urged closer by spring blades 46, 48 whose middle part is supported on the drive shaft 30, while its ends rest on the knives 42, 44 near their ends. The document US 5,969,308 describes a device according to the preamble of claim 1.

La présente invention a maintenant pour but de perfectionner les dispositifs connus existants.The present invention now aims to improve the existing known devices.

Ce but est atteint dans le cadre de la présente invention grâce à un dispositif de coupure électrique du type défini en revendication 1 annexée.This object is achieved within the scope of the present invention by means of an electrical breaking device of the type defined in appended claim 1.

Selon d'autres caractéristiques avantageuses de la présente invention :

  • l'arbre d'entraînement est monté à rotation et il est prévu deux contacts fixes, par exemple diamétralement opposés par rapport à l'arbre rotatif, coopérant avec chaque jeu de contacts mobiles ;
  • l'arbre d'entraînement porte plusieurs jeux, par exemple au moins trois jeux, voire quatre, de contacts mobiles, qui coopèrent respectivement avec une paire de contacts fixes ;
  • chaque ensemble de sollicitation élastique est lui-même formé de deux ressorts ayant globalement la forme d'un W ;
  • chaque ressort en W comprend des éléments d'extrémité en C qui entourent partiellement un élément de couteau mobile, pour interdire la séparation des couteaux ;
  • chaque ressort en W comprend un élément central en V élastique ;
  • les moyens de sollicitation élastique sont placés au moins partiellement dans des renfoncements formés sur les couteaux mobiles, pour interdire un déplacement entre ces moyens de sollicitation et les couteaux, dans le sens longitudinal de ces derniers ;
  • chaque couteau est formé de deux lamelles globalement parallèles reliées entre elles par un pont de matière ;
  • les deux ensembles de sollicitation élastique associés à chaque jeu de contacts mobiles sont disposés respectivement de part et d'autre d'un élément de l'arbre ;
  • l'élément précité de l'arbre a une épaisseur axiale inférieure à celle des contacts fixes, de sorte que, en position de fermeture, les couteaux de contact mobile soient séparés de l'arbre ; et
  • en position d'ouverture, les couteaux reposent contre cet élément de l'arbre sous l'effet de la sollicitation élastique.
According to other advantageous features of the present invention:
  • the drive shaft is rotatably mounted and there are provided two fixed contacts, for example diametrically opposed with respect to the rotary shaft, cooperating with each set of movable contacts;
  • the drive shaft carries several sets, for example at least three sets, or four, of movable contacts, which cooperate respectively with a pair of fixed contacts;
  • each set of resilient biasing is itself formed of two springs having generally the shape of a W;
  • each W-spring comprises C-end elements which partially surround a movable knife element, to prohibit the separation of the knives;
  • each spring W comprises a central element V elastic;
  • the elastic biasing means are placed at least partially in recesses formed on the movable knives, to prohibit movement between these biasing means and the knives, in the longitudinal direction thereof;
  • each knife is formed of two generally parallel strips connected together by a bridge of material;
  • the two sets of elastic biasing associated with each set of movable contacts are disposed respectively on either side of an element of the shaft;
  • the aforesaid element of the shaft has an axial thickness less than that of the fixed contacts, so that, in the closed position, the movable contact blades are separated from the shaft; and
  • in the open position, the knives rest against this element of the tree under the effect of the elastic stress.

D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre, et en regard des dessins annexés, donnés à titre d'exemples non limitatifs et sur lesquels :

  • la figure 1 précédemment décrite représente schématiquement, selon une vue partielle en coupe axiale longitudinale, un dispositif de coupure connu conforme à l'état de la technique,
  • la figure 2 représente une vue en coupe axiale longitudinale similaire partielle d'un dispositif conforme à la présente invention,
  • la figure 3 représente une vue en coupe transversale d'un jeu de contacts mobiles selon le plan de coupe référencé III-III sur la figure 2,
  • la figure 4 représente une vue schématique en perspective d'un ressort conforme à la présente invention,
  • les figures 5 et 6 représentent des vues en perspective de couteaux de contacts mobiles conformes à la présente invention,
  • la figure 7 représente une vue partielle en perspective d'un arbre d'entraînement équipé de deux jeux de contacts mobiles conformes à la présente invention, et
  • la figure 8 représente une vue schématique partielle en perspective d'un arbre conforme à la présente invention avant mise en place des moyens de contacts mobiles.
Other features, objects and advantages of the present invention will appear on reading the detailed description which follows, and with reference to the appended drawings, given by way of non-limiting examples and in which:
  • the figure 1 previously described schematically shows, in a partial view in longitudinal axial section, a known cut-off device according to the state of the art,
  • the figure 2 represents a partial longitudinal axial sectional view of a device according to the present invention,
  • the figure 3 represents a cross-sectional view of a set of movable contacts according to the section plane referenced III-III on the figure 2 ,
  • the figure 4 is a schematic perspective view of a spring according to the present invention,
  • the Figures 5 and 6 represent perspective views of movable contact knives according to the present invention,
  • the figure 7 is a partial perspective view of a drive shaft equipped with two sets of movable contacts according to the present invention, and
  • the figure 8 is a partial schematic perspective view of a shaft according to the present invention before implementation of the movable contact means.

Le dispositif de coupure électrique conforme à la présente invention est placé dans un boîtier non représenté sur les figures annexées pour simplifier l'illustration.The electric breaking device according to the present invention is placed in a housing not shown in the accompanying figures to simplify the illustration.

Ce boîtier peut faire l'objet de toute réalisation appropriée quant à sa géométrie et son matériau constitutifs.This housing can be the object of any appropriate embodiment as to its geometry and its constituent material.

Le dispositif de coupure conforme à la présente invention comprend un arbre 300 monté à rotation autour de son axe longitudinal 302.The cut-off device according to the present invention comprises a shaft 300 rotatably mounted about its longitudinal axis 302.

L'arbre 300 est réalisé avantageusement en matériau thermoplastique électriquement isolant.The shaft 300 is advantageously made of electrically insulating thermoplastic material.

L'arbre 300 peut en lui-même faire l'objet de nombreuses variantes de réalisation. Sa structure ne sera donc pas décrite dans le détail par la suite.The shaft 300 can in itself be the subject of many variants. Its structure will not be described in detail later.

L'arbre 300 peut être entraîné en rotation autour de l'axe 302, manuellement ou par tout automatisme approprié. Les moyens d'entraînement de l'arbre 300, connus en eux-mêmes, ne seront pas décrits par la suite.The shaft 300 can be rotated about the axis 302, manually or by any appropriate automation. The drive means of the shaft 300, known in themselves, will not be described later.

L'arbre 300 porte au moins un jeu de contacts mobiles 400 destiné à coopérer avec au moins deux contacts fixes supportés par la surface interne du boîtier.The shaft 300 carries at least one set of movable contacts 400 intended to cooperate with at least two fixed contacts supported by the inner surface of the housing.

Les contacts fixes peuvent être connus en eux-mêmes, par exemple du type illustré à la figure 1 sous la référence 20. Ils ne seront donc pas décrits dans le détail dans la suite.The fixed contacts may be known in themselves, for example of the type illustrated in FIG. figure 1 under the reference 20. They will therefore not be described in detail later.

En pratique, l'arbre 300 porte de préférence au moins trois jeux de contacts mobiles 400 répartis axialement sur sa longueur (on a ainsi illustré schématiquement deux de tels jeux de contacts mobiles 400 sur la figure 7).In practice, the shaft 300 preferably carries at least three sets of movable contacts 400 distributed axially along its length (two such sets of movable contacts 400 are thus schematically illustrated on the figure 7 ).

Selon une autre variante, l'arbre 300 porte quatre jeux de contacts mobiles 400, notamment dans le cas de systèmes diphasés.According to another variant, the shaft 300 carries four sets of movable contacts 400, especially in the case of two-phase systems.

Chaque jeu de contacts mobiles 400 comporte deux couteaux parallèles 420 et 440 sollicités en rapprochement par des moyens élastiques 500.Each set of movable contacts 400 comprises two parallel knives 420 and 440 urged together by elastic means 500.

Les deux couteaux 420, 440 sont de structure identique et disposés symétriquement l'un en regard de l'autre.The two knives 420, 440 are of identical structure and arranged symmetrically one facing each other.

Plus précisément, de préférence, comme on le voit sur les figures 5, 6 et 7, chaque couteau 420 et 440 est ajouré longitudinalement à chaque extrémité. En d'autres termes, chaque couteau 420, 440 est muni de deux encoches longitudinales 421, 422, 441, 442 qui débouchent sur leurs extrémités longitudinales.More precisely, preferably, as we see on the Figures 5, 6 and 7 each knife 420 and 440 is perforated longitudinally at each end. In other words, each knife 420, 440 is provided with two longitudinal notches 421, 422, 441, 442 which open on their longitudinal ends.

Ainsi, chaque couteau 420, 440 est constitué de deux lames parallèles 423, 424, 443, 444 reliées entre elles en partie médiane par un pont 425, 445.Thus, each knife 420, 440 consists of two parallel blades 423, 424, 443, 444 interconnected in the middle part by a bridge 425, 445.

Les couteaux 420, 440 sont réalisés en un matériau électriquement conducteur. Il s'agit de préférence d'un métal relativement rigide, tel que du cuivre argenté.The knives 420, 440 are made of an electrically conductive material. It is preferably a relatively rigid metal, such as silver copper.

Comme on le voit sur la figure 7, à l'utilisation, les couteaux 420 et 440 sont disposés selon une orientation généralement radiale par rapport à l'axe 302 de l'arbre 300. Plus précisément encore, les couteaux 420, 440 sont disposés dans des cavités 310, 320 formées dans l'arbre 300. Ainsi, les couteaux 420, 440 traversent l'arbre 300 et émergent de part et d'autre de celui-ci pour coopérer avec les contacts fixes 20. Plus précisément encore, comme on le voit sur la figure 8, les deux couteaux 420, 440 sont disposés respectivement dans une cavité 310, 320 traversant l'arbre 300 dans une direction radiale.As we see on the figure 7 in use, the knives 420 and 440 are arranged in a generally radial orientation relative to the axis 302 of the shaft 300. More specifically, the knives 420, 440 are disposed in cavities 310, 320 formed in the shaft 300. Thus, the knives 420, 440 through the shaft 300 and emerge on either side thereof to cooperate with the fixed contacts 20. More precisely, as seen on the figure 8 , the two knives 420, 440 are respectively disposed in a cavity 310, 320 passing through the shaft 300 in a radial direction.

Les deux cavités 310, 320 sont ainsi séparées par un élément intermédiaire ou membrane radiale 330 qui sert d'appui au couteau 420, 440 en position d'ouverture du dispositif de coupure. La membrane 330 peut elle même être ajourée.The two cavities 310, 320 are thus separated by an intermediate element or radial membrane 330 which serves to support the knife 420, 440 in the open position of the cut-off device. The membrane 330 may itself be perforated.

Bien entendu, la dimension axiale des cavités 310, 320, c'est-à-dire la dimension de ces cavités considérée parallèlement à l'axe 302 doit être supérieure à l'épaisseur des couteaux 420, 440 pour autoriser un débattement de ceux-ci dans les cavités 310, 320 lorsque le dispositif de coupure est déplacé de la position de fermeture vers la position d'ouverture ou inversement.Of course, the axial dimension of the cavities 310, 320, that is to say the dimension of these cavities considered parallel to the axis 302 must be greater than the thickness of the knives 420, 440 to allow a movement of these in the cavities 310, 320 when the cut-off device is moved from the closed position to the open position or vice versa.

Dans le cadre de la présente invention, les moyens élastiques 500 sont constitués de deux ressorts 510, en forme générale de W, disposés respectivement sur chaque extrémité des couteaux 420, 440.In the context of the present invention, the elastic means 500 consist of two springs 510, generally W-shaped, respectively disposed on each end of the knives 420, 440.

Ainsi, en d'autres termes, chaque paire de couteaux 420, 440 est associée à quatre ressorts 510 en forme de W.Thus, in other words, each pair of knives 420, 440 is associated with four springs 510 W-shaped.

Plus précisément encore, comme on le voit notamment sur les figures 3 et 4, chaque ressort 510 comporte une partie médiane 512 en forme de V prolongée respectivement de part et d'autre par deux extrémités 514, 516 en forme générale de C.More precisely, as can be seen in particular in Figures 3 and 4 each spring 510 has a V-shaped median portion 512 extended respectively on either side by two ends 514, 516 in the general shape of C.

Les ressorts 510 ont ainsi une section constante sur toute leur longueur.The springs 510 thus have a constant section over their entire length.

La partie médiane 512 en forme de V confère à chaque ressort 510 un effet élastique.The median portion 512 V-shaped gives each spring 510 an elastic effect.

Les extrémités en C 514, 516 ont pour fonction d'entourer au moins partiellement une lame respective 423, 424, 443, 444 d'un couteau 420, 440 comme on le voit sur la figure 3.The ends C 514, 516 have the function of at least partially surrounding a respective blade 423, 424, 443, 444 of a knife 420, 440 as seen on the figure 3 .

Ainsi, les ressorts 510 interdisent un libre écartement des couteaux 420, 440.Thus, the springs 510 prohibit free spacing of the knives 420, 440.

Plus précisément encore, de préférence, selon l'invention, chaque ressort 510 est disposé au moins partiellement dans un renfoncement ou décrochement 402 formé dans chaque lame 423, 424, 443, 444 (un tel décrochement 402 est visible par exemple sur la figure 6). Ainsi, l'engagement des ressorts 510 dans le décrochement 402 interdit un décalage longitudinal relatif entre le ressort 510 et le couteau 420 ou 440 associé.More precisely, preferably, according to the invention, each spring 510 is disposed at least partially in a recess or recess 402 formed in each blade 423, 424, 443, 444 (such a recess 402 is visible for example on the figure 6 ). Thus, the engagement of the springs 510 in the recess 402 prohibits a relative longitudinal shift between the spring 510 and the associated knife 420 or 440.

Par ailleurs, deux ensembles de ressorts 510 étant disposés respectivement de part et d'autre de la membrane 330 de l'arbre 300, l'homme de l'art comprendra que les ressorts 510 interdisent également un déplacement relatif entre les couteaux 420, 440 et l'arbre 300 dans un sens radial par rapport à l'axe 302 de l'arbre 300.Furthermore, two sets of springs 510 being disposed respectively on either side of the membrane 330 of the shaft 300, the skilled person will understand that the springs 510 also prohibit a relative movement between the knives 420, 440 and the shaft 300 in a radial direction relative to the axis 302 of the shaft 300.

Plus précisément encore, selon le mode de réalisation préférentiel illustré sur les figures annexées, chaque ressort 510 comprend deux tronçons plans coplanaires 520, 522 reliés entre eux par deux membrures 524, 526 formant le V élastique 512 précité. Celui-ci définit une concavité dirigée vers l'extérieur du W.More precisely still, according to the preferred embodiment illustrated in the appended figures, each spring 510 comprises two coplanar planar sections 520, 522 interconnected by two ribs 524, 526 forming the above-mentioned elastic V 512. This defines a concavity directed towards the outside of W.

Les deux tronçons de base 520, 522 sont par ailleurs prolongés respectivement par deux tronçons 528, 530 parallèles entre eux et respectivement perpendiculaires aux tronçons de base 520, 522. Ces tronçons 528, 530 délimitent les extrémités du ressort en W. Enfin, ces deux tronçons 528, 530 d'extrémité sont eux-mêmes prolongés par des retours 529, 531 parallèles au tronçon de base 520, 522 et perpendiculaires aux tronçons 528, 530. Les retours 529, 531 sont dirigés l'un vers l'autre, soit vers l'intérieur du W.The two base sections 520, 522 are further extended respectively by two sections 528, 530 parallel to each other and respectively perpendicular to the base sections 520, 522. sections 528, 530 delimit the ends of the spring W. Finally, these two end sections 528, 530 are themselves extended by returns 529, 531 parallel to the base section 520, 522 and perpendicular to the sections 528, 530. The returns 529, 531 are directed towards each other, towards the inside of the W.

La largeur des tronçons 528, 530 est supérieure à la largeur de chaque lame 421, 423, 441, 443, comme on le voit sur la figure 3.The width of the sections 528, 530 is greater than the width of each blade 421, 423, 441, 443, as can be seen in FIG. figure 3 .

A l'utilisation, le V 512 est disposé entre les deux couteaux 420, 440, les parois de base 520, 522 étant orientées parallèlement à l'axe 302 en regard de la paroi intermédiaire 330 de l'arbre.In use, the V 512 is disposed between the two knives 420, 440, the base walls 520, 522 being oriented parallel to the axis 302 facing the intermediate wall 330 of the shaft.

Les tronçons de base 520, 522 sont ainsi disposés sur l'extérieur des couteaux 420, 440, les retours 529, 531 pénétrant dans les encoches longitudinales 421, 422, 441, 442.The base sections 520, 522 are thus arranged on the outside of the knives 420, 440, the returns 529, 531 penetrating into the longitudinal notches 421, 422, 441, 442.

Enfin, les tronçons d'extrémité 528, 530 sont positionnés dans les décrochements 402, lesquels sont formés, comme on le voit sur les figures annexées, sur les surfaces extérieures des couteaux 420, 440.Finally, the end sections 528, 530 are positioned in the recesses 402, which are formed, as shown in the accompanying figures, on the outer surfaces of the knives 420, 440.

En position d'ouverture du dispositif de coupure, c'est-à-dire lorsque les couteaux 420, 440 sont séparés des contacts fixes 20, les couteaux 420, 440 reposent sur l'élément intermédiaire 330 sous l'effet de la sollicitation des ressorts 510.In the open position of the cut-off device, that is to say when the knives 420, 440 are separated from the fixed contacts 20, the knives 420, 440 rest on the intermediate element 330 under the effect of the loading of the springs 510.

Au contraire, lorsque l'arbre 300 est déplacé en position de fermeture par rotation autour de son axe 302, les contacts fixes 20 sont positionnés entre les deux couteaux 420, 440, ces derniers étant toujours sollicités élastiquement contre les contacts fixes 20 par les ressorts 510.On the contrary, when the shaft 300 is moved in the closed position by rotation about its axis 302, the fixed contacts 20 are positioned between the two knives 420, 440, the latter being always elastically biased against the fixed contacts 20 by the springs. 510.

Dans cette position de fermeture, les couteaux 420, 440, ainsi que les ressorts 510 sont en principe séparés mécaniquement, c'est-à-dire découplés mécaniquement de l'arbre 300, grâce au jeu ménagé entre les couteaux 420, 440 et les cavités 310, 320 et à l'épaisseur axiale de la membrane 330 inférieure à l'épaisseur des contacts fixes 20. Ainsi, dans le cadre de la présente invention, on supprime toute transmission de vibration mécanique entre les jeux de contacts mobiles 400 et l'arbre 300 et par le fait même d'un jeu de contacts mobiles 400 à l'autre par l'intermédiaire de l'arbre 300.In this closed position, the knives 420, 440, as well as the springs 510 are in principle mechanically separated, that is to say mechanically decoupled from the shaft 300, thanks to the clearance between the knives 420, 440 and the blades. cavities 310, 320 and the axial thickness of the membrane 330 less than the thickness of the fixed contacts 20. Thus, in the In the context of the present invention, any transmission of mechanical vibration between the sets of movable contacts 400 and the shaft 300 and, by the same token, of a set of movable contacts 400 to the other via the shaft is eliminated. 300.

On a schématisé sur la figure 7 un arbre 300 équipé de deux ensembles de contacts mobiles 400.We have schematised on the figure 7 a shaft 300 equipped with two sets of movable contacts 400.

En pratique, de préférence, chaque arbre 300 est équipé d'au moins trois jeux de contacts mobiles 400 pour couper respectivement une des phases d'un système triphasé.In practice, preferably, each shaft 300 is equipped with at least three sets of movable contacts 400 for respectively cutting one of the phases of a three-phase system.

Plus précisément encore, l'arbre 300 peut être équipé d'un quatrième jeu de contacts mobiles 400 pour couper la ligne de terre comme indiqué précédemment.More specifically, the shaft 300 may be equipped with a fourth set of movable contacts 400 to cut the ground line as indicated above.

Les ressorts 510 peuvent être réalisés en tout matériau élastique approprié, de préférence en métal, par exemple à base de bronze béryllium.The springs 510 may be made of any suitable elastic material, preferably of metal, for example based on beryllium bronze.

Bien entendu, la présente invention n'est pas limitée au mode de réalisation particulier qui vient d'être décrit mais s'étend à toute variante conforme à son esprit.Of course, the present invention is not limited to the particular embodiment which has just been described but extends to any variant within its spirit.

Ainsi par exemple, la présente invention peut notamment trouver application dans des dispositifs de coupure dans lesquels l'arbre d'entraînement 300 n'est pas monté à rotation, mais à translation.Thus, for example, the present invention can notably be used in cut-off devices in which the drive shaft 300 is not rotatably mounted, but in translation.

Par ailleurs, selon le mode de réalisation préférentiel précédemment décrit, chaque jeu de contacts mobiles 400 coopère avec deux contacts fixes 20. En pratique, cependant, l'invention peut également trouver application dans des dispositifs de coupure dans lesquels chaque jeu de contacts mobiles 400 coopère avec un seul contact fixe 20.Moreover, according to the preferred embodiment previously described, each set of movable contacts 400 cooperates with two fixed contacts 20. In practice, however, the invention can also find application in cut-off devices in which each set of mobile contacts 400 cooperates with a single fixed contact 20.

La présente invention peut trouver application dans tout type d'interrupteur, sectionneur, notamment pour la coupure de haute et/ou basse tension, en particulier pour dispositif de coupure souterrain. Cependant la présente invention n'est pas limitée à ce domaine et couvre également les dispositifs de coupure aérien.The present invention may find application in any type of switch, disconnector, in particular for the high and / or low voltage cutoff, in particular for an underground cutoff device. However the present invention is not limited to this field and also covers air cutoff devices.

La présente invention permet notamment d'obtenir des performances importantes lors de fermetures sur court-circuitThe present invention notably makes it possible to obtain high performances during closures on a short circuit

Claims (13)

  1. An electric cut-off device comprising:
    • at least one fixed contact (20),
    • a driving shaft (300),
    • at least one set of mobile contacts (400), borne by the driving shaft (300), which set of mobile contacts (400) includes at least two generally parallel knives (420, 440), and
    • elastic urging means (500), associated with the knives (420, 440) of the set of mobile contacts, in order or urge the latter to bring them closer,
    by displacement of the driving shaft (300) the set of mobile contacts (400) being displaced between at least two positions: a closing position in which the knives (420, 440) rest through at least one of their ends, on the fixed contact (20), and an opening position in which the knives (420, 440) are separated from the fixed contact (20),
    characterized by the fact that the elastic means (500) associated with each set of mobile contacts (400), are formed with two separate assemblies respectively positioned in proximity to the ends of the knives (420, 440),forming at least one adapted clamp for maintaining the knives (420, 440) on the driving shaft (300) while allowing mechanical disengagement between the knife assembly (420, 440)/elastic urging means (500) and the driving shaft (300), in the closing position.
  2. The device according to claim 1, characterized by the fact that the shaft (300) is rotatably mounted and that it is provided with two fixed contacts (20), preferably diametrically opposite relatively to the axis of rotation (300), cooperating with each set of mobile contacts (400).
  3. The device according to any of claims 1 or 2, characterized by the fact that the driving shaft (300) bears several sets of mobile contacts (400) which respectively cooperate with a pair of fixed contacts (20).
  4. The device according to any of claims 1 to 3, characterized by the fact that each elastic urging assembly is itself formed with two springs (510) globally having the shape of a W.
  5. The device according to claim 4, characterized by the fact that each W-shaped spring (510) comprises C-shaped end members which partly surround a mobile knife member (420, 440), in order to prevent separation of the knives (420, 440).
  6. The device according to any of claims 4 or 5, characterized by the fact that each W-shaped spring (510) comprises an elastic V-shaped central member (512).
  7. The device according to any of claims 1 to 6, characterized by the fact that the elastic urging means (510) are at least partly placed in recesses (402) formed on the mobile knives (420, 440) in order to prevent displacement between these urging means (510) and the knives (420, 440) in the longitudinal direction of the latter.
  8. The device according to any of claims 1 to 7, characterized by the fact that each knife (420, 440) is formed with two globally parallel blades (422, 432, 442, 443), connected together through a bridge of material (424, 444).
  9. The device according to any of claims 1 to 8, characterized by the fact that it comprises two urging assemblies (500) respectively positioned on either side of a member (330) of the shaft (300) in order to prevent displacement of the knives (420, 440) relatively to the shaft in a radial direction.
  10. The device according to any of claims 1 to 9, characterized by the fact that the shaft (300) comprises a member (330) positioned between two knives (420, 440), which intermediate member of the shaft (330) has a smaller axial thickness than that of the fixed contacts (20), so that in the closing position, the mobile contact knives (420, 440) are separated from the shaft (300).
  11. The device according to claim 10, characterized by the fact that in the opening position, the knives (420, 440) rest against the intermediate member (330) of the shaft (300), under the effect of elastic urging.
  12. The device according to any of claims 1 to 11, characterized by the fact that the elastic urging means (500) are formed on the basis of beryllium bronze.
  13. The device according to any of claims 1 to 12, characterized by the fact that the driving shaft (300) bears at least three sets of mobile contacts (400).
EP01403122A 2000-12-07 2001-12-05 Improvements to electrical swith devices Expired - Lifetime EP1213730B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0015906A FR2818004B1 (en) 2000-12-07 2000-12-07 IMPROVEMENTS ON ELECTRICAL SWITCHING DEVICES
FR0015906 2000-12-07

Publications (2)

Publication Number Publication Date
EP1213730A1 EP1213730A1 (en) 2002-06-12
EP1213730B1 true EP1213730B1 (en) 2010-01-27

Family

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Application Number Title Priority Date Filing Date
EP01403122A Expired - Lifetime EP1213730B1 (en) 2000-12-07 2001-12-05 Improvements to electrical swith devices

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EP (1) EP1213730B1 (en)
AT (1) ATE456854T1 (en)
DE (1) DE60141197D1 (en)
ES (1) ES2339917T3 (en)
FR (1) FR2818004B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9697958B2 (en) 2012-12-20 2017-07-04 Abb Oy Movable contact of electric switch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202775A (en) * 1959-12-04 1965-08-24 Gen Electric Rotor type electric switch with resiliently mounted contact members
US3632935A (en) * 1970-01-22 1972-01-04 Gen Electric Double blade rotor switch with blades insertable into rotatable shaft
US5969308A (en) * 1998-04-02 1999-10-19 Siemens Energy & Automation, Inc. Rotary switch including spring biased knife blade contacts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9697958B2 (en) 2012-12-20 2017-07-04 Abb Oy Movable contact of electric switch

Also Published As

Publication number Publication date
FR2818004A1 (en) 2002-06-14
FR2818004B1 (en) 2003-10-24
EP1213730A1 (en) 2002-06-12
ATE456854T1 (en) 2010-02-15
ES2339917T3 (en) 2010-05-27
DE60141197D1 (en) 2010-03-18

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