EP3792949A1 - Electrical switching apparatus with separable contacts - Google Patents

Electrical switching apparatus with separable contacts Download PDF

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Publication number
EP3792949A1
EP3792949A1 EP20195643.0A EP20195643A EP3792949A1 EP 3792949 A1 EP3792949 A1 EP 3792949A1 EP 20195643 A EP20195643 A EP 20195643A EP 3792949 A1 EP3792949 A1 EP 3792949A1
Authority
EP
European Patent Office
Prior art keywords
lever
control lever
rebound
contact
rotation
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
EP20195643.0A
Other languages
German (de)
French (fr)
Other versions
EP3792949B1 (en
Inventor
Christian Bach
Javier Herreros
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP3792949A1 publication Critical patent/EP3792949A1/en
Application granted granted Critical
Publication of EP3792949B1 publication Critical patent/EP3792949B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/504—Manual reset mechanisms which may be also used for manual release provided with anti-rebound means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/52—Driving mechanisms, i.e. for transmitting driving force to the contacts with means to ensure stopping at intermediate operative positions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H2001/508—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position with mechanical means to prevent return/reverse movement of movable contact once opening or closing cycle has started
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H2003/326—Driving mechanisms, i.e. for transmitting driving force to the contacts using bearings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling

Definitions

  • the present invention relates to an electrical switching device with separable contacts.
  • Electrical switching devices with separable contacts such as low voltage circuit breakers, generally have, for each pole, a fixed electrical contact and a movable electrical contact which can be moved relative to each other by means of a mechanism. switch to interrupt the flow of an electric current.
  • the patent EP-2 801 099-B1 describes an example of a switching apparatus.
  • a drawback of known switching devices is that, when the switching mechanism is actuated to separate the fixed and movable contacts in order to interrupt the flow of current, the movable contact may accidentally close once it has reached the opening limit switch. , for example because of an uncontrolled rebound of one or more moving parts of the switching mechanism.
  • the invention more particularly intends to remedy by proposing an electrical switching device with separable contacts in which the risk of accidental closing of the electrical contacts is reduced.
  • the figures 1 to 3 show an electrical switching device 2, such as a contactor, or a circuit breaker, or a relay, for example intended to be connected to an electricity distribution installation.
  • an electrical switching device 2 such as a contactor, or a circuit breaker, or a relay, for example intended to be connected to an electricity distribution installation.
  • the apparatus 2 comprises a switching device 4 with separable contacts and a switching mechanism coupled to the separable contacts of the device 4 for switching between open and closed states, for example in response to a trip command sent from a trip unit or from a device. control organ.
  • the device 2 is a multipolar device and comprises several poles, each including a device 4 similar to that described. In this case, the description of device 4 can be transposed to the other poles of device 2.
  • device 2 has three or four poles to be connected to a three-phase installation. In other cases, the device 2 may have a single pole.
  • the device 4 comprises a fixed electrical contact 6 and a mobile electrical contact 8, connected to respective connection terminals of the device 2.
  • the movable contact 8 is movable between a closed position and an open position relative to the fixed contact 6 to, respectively, allow and prevent the flow of an electric current between the contacts 6 and 8.
  • the movable contact 8 is mounted to pivot relative to a fixed support 10 of the device 4 and moves between the open and closed positions by rotation about an axis of rotation X8.
  • the movable contact 8 is shown in the closed position on the figure 1 and in the open position on the figures 2 and 3 .
  • the device 4 comprises electrically conductive contact pads 12 and 14 respectively mounted on the fixed contact 6 and the movable contact 8.
  • the movable contact 8 comprises one or more contact fingers 16 mounted to pivot relative to the contact 8, each contact finger 16 carrying one of the contact pads 14.
  • the device 4 further comprises a control lever 18 mechanically coupled to the movable electrical contact 8.
  • the control lever 18 is movable in rotation about an axis of rotation X18 parallel to the axis X8, between a first position and a second position.
  • the control lever 18 is in the first position on the figure 1 and in the second position on figures 2 and 3 .
  • control lever 18 moves from the first position to the second position causes a movement of the movable contact 8 from the closed position to its open position.
  • control lever 18 Conversely, the movement of the control lever 18 from the second position to the first position causes a movement of the movable contact 8 from the open position to its closed position.
  • control lever 18 is movable relative to a frame 20 of the device 2.
  • the control lever 18 is mechanically coupled to the movable contact 8 via a connecting piece 22, here having a rectilinear shape.
  • connection piece 22 is mounted to pivot relative to the movable contact 8 by a first pivot connection of axis of rotation X22 and is also mounted to pivot relative to the control lever 18 by a second pivot connection of axis X23 .
  • the X22 and X23 axes are parallel.
  • control lever 18 forms part of a control shaft, also called the pole shaft, aligned with the axis X18 and capable of rotating around the axis X18.
  • the control shaft is for example coupled with the trigger mechanism of the device 2.
  • the control lever 18 is integral with the shaft rotating about the axis X18.
  • the control lever 18 is formed by one or more cams of the control shaft.
  • control lever 18 comprises a first arm and a second arm, not referenced but visible on the figures 1 to 3 .
  • the first arm and the second arm are perpendicular to the axis X18 and are integral with the control shaft. Said arms extend radially projecting from the control shaft. Said arms are here of essentially planar shape and extend in a geometric plane perpendicular to the axis X18.
  • control lever 18 can be envisaged.
  • control shaft is preferably common to the switching devices 4 of the different poles so as to be able to simultaneously control the movement of the respective control levers 26 of these devices. 4.
  • each pole of the device 2 is associated with a dedicated compartment in a housing of the device 2.
  • the compartments are aligned side by side along the axis X18.
  • the drive shaft passes through the side walls separating two neighboring compartments by dedicated passage orifices.
  • the device 4 also comprises a fixed stop 24, for example fixedly mounted on the frame 20 and whose role is explained in what follows.
  • the stop 24 comprises a rod or a rigid protuberance projecting relative to the frame 20 extending parallel to the axis X18.
  • the stop 24 limits the movement of the control lever 18 between the first position and the second position by coming into contact with the first and second arms so as to block the rotation of the shaft.
  • the stop 24 is here in contact with the first arm when the control lever 18 is in the second position, to prevent the control lever 18 from continuing its movement beyond the second position.
  • the stopper 24 is in contact with the second arm when the control lever 18 is in the first position, to prevent the control lever 18 from rotating, in the opposite direction, beyond the first position.
  • the edge of the second arm can be very close to the stop 24 without however being directly in contact with the stop 24.
  • the stop 24 is arranged to limit the movement of the control lever 18 both between the first position and the second position.
  • the device 4 also comprises an anti-rebound lever 26, mounted on the control lever 18 by a pivot link.
  • the control lever 18 can move, relative to the control lever 18, thanks to the pivot connection, in rotation about an axis of rotation X26, between a rest position, also called a retracted position, and a deployed position.
  • the axis X26 is integral with the control lever 18 and is parallel to the axis X18. In other words, the axis X26 and the corresponding pivot link move with the control lever 18.
  • control lever 26 In the rest position, the control lever 26 does not impede the movement of the control lever 18. For example, the anti-rebound lever 26 is then folded over a body of the control lever 18.
  • the anti-rebound lever 26 is arranged to cooperate with the stop 24 when it is in its deployed position and when the control lever 18 is in the second position, so as to prevent the control lever 18 from leaving the second position.
  • the anti-rebound lever 26 is further arranged to move from its rest position to its deployed position when the control lever 18 reaches the second position after movement from the first position.
  • the anti-rebound lever 26 has a flat and rounded shape and comprises a contact portion 28.
  • the contact portion 28 has the shape of a protuberance, such as a rod or a pin.
  • the contact portion 28 extends perpendicularly to the plane of the anti-rebound lever 26, that is to say directed parallel to the direction of the first axis of rotation X18.
  • the first arm and the anti-rebound lever 26 are not necessarily both constantly in direct contact with the stop 24, so that a small displacement in the vicinity of the second position may be allowed in such a case for the control lever 18.
  • the pivot link connecting the part 22 to the control lever 18 is mounted on the first arm.
  • the pivot link connecting the control lever 18 to the anti-rebound lever 26 is mounted on the second arm.
  • the first and second arms are here connected by a rounded portion in the form of an arc of a circle centered on the axis X18.
  • the anti-rebound lever 26 covers the rounded portion and the upper edge of the anti-rebound lever 26 is aligned with the outer edge of the rounded portion. The anti-rebound lever 26 then does not protrude from the rounded portion, so as not to hinder the movement of the control lever 18 and of the shaft.
  • the switching device 4 further comprises a fixed bearing 30 mounted around the control lever 18.
  • the bearing 30 is mounted around the control shaft of the control lever 18.
  • the bearing 30 has the shape of a ring centered on the axis of rotation X18.
  • the diameter of the bearing 30 is greater than or equal to 15mm or to 20mm.
  • the bearing 30 can be made of metal, such as bronze, or of hardened polymer, or of any suitable material.
  • the bearing 30 is integral with the frame 20 of the device 2, for example by virtue of a connecting piece 32 mounted on the frame 20.
  • the bearing 30 comprises a connecting portion 36 lobe-shaped to which the connecting piece 32 is connected.
  • the anti-rebound lever 26 and the bearing 30 are configured such that the contact portion 28 contacts an edge of the bearing 30 when the anti-rebound lever 26 is in its rest position and that the contact portion 28 moves along said edge as the control lever 18 rotates around the bearing 30.
  • the contact portion 28 is maintained in direct contact against the edge of the bearing 30 under the effect of an elastic return member, such as a torsion spring, which tends to return the anti-rebound lever 26 to its rest position.
  • an elastic return member such as a torsion spring
  • the torsion spring is for example mounted associated with the anti-rebound lever 26.
  • the bearing 30 comprises, on said edge, a guide portion 34 in the form of a cam configured to push the anti-rebound lever 26 towards its deployed position.
  • the edge of the bearing 30 comprises an inclined part which locally moves away radially from the axis of rotation X18 to form at least a first part of the guide portion 34.
  • device 4 is in the closed state, as illustrated in figure 1 .
  • the conductive parts of contacts 6 and 8 touch each other and electric current can flow.
  • the control lever 18 is in the first position.
  • an edge of the second arm is in contact with the stop 24, or very close to the stop 24, for example at a distance of less than five millimeters from the stop 24.
  • the anti-rebound lever 26 is in the rest position. .
  • the switching mechanism is triggered to open the device 4, that is to say to separate the contacts 6 and 8 and to interrupt the current.
  • control lever 18 is rotated around the axis X18, for example by turning the shaft in a first direction of rotation, illustrated by the arrow F1 on the figure. figure 2 .
  • This movement is transmitted by the part 22 to the movable contact 8 which then rotates around the axis X8 in a second direction of rotation, illustrated by the arrow F2.
  • the anti-rebound lever 26 remains in the rest position, i.e. it remains stationary relative to the control lever 18.
  • the anti-rebound lever 26 rotates with the control lever 28 about the axis of rotation X18 relative to the fixed bearing 30. In doing so, the contact portion 28 follows the edge of the bearing 30, for example by sliding downwards. contact along this edge.
  • the anti-rebound lever 26 then continues its movement towards the deployed position under the effect of the centrifugal force due to the rotation of the control lever 18. For example, this centrifugal force is sufficient to exceed the return force exerted by the recall body.
  • the limit switch here corresponds to the position in which the first arm comes into contact with the stop 24, as illustrated in figure 2 .
  • control lever 18 In practice, when the control lever 18 arrives in its second position at the end of its travel, it is liable, because of its speed, to rebound and then to move in the opposite direction towards its first position.
  • the first arm strikes the stop 24 when it reaches the end of its travel.
  • the control lever 18 has also started to leave the second position and the first arm has started to move away slightly from the stop 24.
  • control lever 18 can no longer continue to move away from the second position, which prevents accidental reopening of the contacts 6 and 8.
  • the position of the guide portion 34 on the bearing 30, which determines the angular position from which the contact portion 28 begins to be pushed radially away from the axis of rotation X18 as and when that the anti-rebound lever 26 rotates about the axis of rotation 18, is chosen according to the angular position of the stopper 24, so that the movement of the anti-rebound lever 26 to its deployed position begins and continues ends before the control lever 18 comes into abutment against the stop 24.
  • the anti-rebound lever 26 prevents the control lever 18 from leaving its second position, by cooperating with the stopper 24, even if the control lever 18 rebounds against the stopper and has started to move away from it, as this is the case here.
  • the control lever 18 then remains in the vicinity of the second position. Contact 8 therefore cannot accidentally close.
  • the movement of the anti-rebound lever 26 is not dependent on the speed of rotation of the control lever 18.
  • the guide portion 34 makes it possible to initiate the movement of the anti-rebound lever 26 towards its position. deployed even when the centrifugal force resulting from the rotation of the control lever 18 is not sufficient to initiate this movement.
  • anti-rebound lever 26 is easy to integrate into the device 2 without having to completely modify the architecture of the device 4.
  • the anti-rebound lever 26 can then be returned to its rest position, for example once the control lever 18 is immobilized in the second position.
  • the return to the rest position can be carried out manually or by gravity or by an elastic return member.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Switches With Compound Operations (AREA)

Abstract

Un appareil de commutation électrique (2) à contacts séparables, comprend un dispositif de commutation (4) comportant: un levier de commande (18) couplé mécaniquement à un contact électrique mobile (8) et un levier anti-rebond (26), monté sur le levier de commande (18) et configuré pour se déplacer vers une position déployée pour coopérer avec une butée (24) pour empêcher le levier de commande de quitter sa position.Le dispositif de commutation comporte un palier fixe (30) monté autour du levier de commande. Le levier anti-rebond comporte une portion de contact (28) qui est en contact contre un bord du palier lorsque le levier anti-rebond est dans sa position de repos et qui se déplace le long dudit bord lorsque le levier de commande tourne autour du palier. Le palier comporte, sur ledit bord, une portion de guidage (34) en forme de came configurée pour pousser le levier anti-rebond vers sa position déployée.An electrical switching device (2) with separable contacts, comprises a switching device (4) comprising: a control lever (18) mechanically coupled to a movable electrical contact (8) and an anti-rebound lever (26), mounted on the control lever (18) and configured to move to an extended position to cooperate with a stopper (24) to prevent the control lever from leaving its position. The switching device has a fixed bearing (30) mounted around the control lever. The anti-rebound lever has a contact portion (28) which contacts an edge of the bearing when the anti-rebound lever is in its home position and which moves along said edge as the control lever rotates around the housing. bearing. The bearing has, on said edge, a cam-shaped guide portion (34) configured to push the anti-rebound lever to its deployed position.

Description

La présente invention concerne un appareil de commutation électrique à contacts séparables.The present invention relates to an electrical switching device with separable contacts.

Les appareils de commutation électrique à contacts séparables, tels que les disjoncteurs à basse tension, comportent généralement, pour chaque pôle, un contact électrique fixe et un contact électrique mobile qui peuvent être déplacés l'un par rapport à l'autre grâce à un mécanisme de commutation pour interrompre la circulation d'un courant électrique. Le brevet EP-2 801 099-B1 décrit un exemple d'un appareil de commutation.Electrical switching devices with separable contacts, such as low voltage circuit breakers, generally have, for each pole, a fixed electrical contact and a movable electrical contact which can be moved relative to each other by means of a mechanism. switch to interrupt the flow of an electric current. The patent EP-2 801 099-B1 describes an example of a switching apparatus.

Un inconvénient des appareils de commutation connus est que, lorsque le mécanisme de commutation est actionné pour séparer les contacts fixe et mobile afin d'interrompre la circulation du courant, le contact mobile peut se refermer accidentellement une fois arrivé en fin de course d'ouverture, par exemple à cause d'un rebond non maîtrisé d'une ou plusieurs pièces mobiles du mécanisme de commutation.A drawback of known switching devices is that, when the switching mechanism is actuated to separate the fixed and movable contacts in order to interrupt the flow of current, the movable contact may accidentally close once it has reached the opening limit switch. , for example because of an uncontrolled rebound of one or more moving parts of the switching mechanism.

Si les contacts se referment accidentellement, le courant électrique peut à nouveau circuler, alors que l'appareil est supposé être dans un état ouvert. Une telle situation doit être évitée pour des raisons de sécurité.If the contacts accidentally close, electrical current can flow again, while the device is assumed to be in an open state. Such a situation should be avoided for safety reasons.

C'est à cet inconvénient qu'entend plus particulièrement remédier l'invention en proposant un appareil de commutation électrique à contacts séparables dans lequel le risque de fermeture accidentelle des contacts électriques est réduit.It is this drawback that the invention more particularly intends to remedy by proposing an electrical switching device with separable contacts in which the risk of accidental closing of the electrical contacts is reduced.

Selon un aspect de l'invention, un appareil de commutation électrique à contacts séparables comprend un dispositif de commutation comportant :

  • un contact électrique fixe et un contact électrique mobile déplaçable entre une position de fermeture et une position d'ouverture ;
  • un levier de commande couplé mécaniquement au contact électrique mobile, le levier de commande étant mobile en rotation, autour d'un premier axe de rotation, entre une première position et une deuxième position, en étant configuré pour que le déplacement du levier de commande depuis la première position vers la deuxième position entraînant un déplacement du contact mobile depuis la position de fermeture vers la position d'ouverture ;
  • un levier anti-rebond, monté sur le levier de commande par une liaison pivot et pouvant se déplacer, grâce à la liaison pivot, en rotation autour d'un deuxième axe de rotation parallèle au premier axe de rotation, entre une position de repos et une position déployée, le levier anti-rebond étant configuré pour se déplacer depuis la position de repos vers la position déployée lorsque le levier de commande atteint la deuxième position et pour coopérer avec une butée du dispositif de commutation lorsque le levier anti-rebond est dans sa position déployée et que le levier de commande est dans la deuxième position pour empêcher le levier de commande de quitter la deuxième position ;
  • dans lequel le dispositif de commutation comporte un palier fixe monté autour du levier de commande, le levier anti-rebond comportant une portion de contact qui est en contact contre un bord du palier fixe lorsque le levier anti-rebond est dans sa position de repos et qui se déplace le long dudit bord lorsque le levier de commande tourne autour du palier,
  • et dans lequel le palier fixe comporte, sur ledit bord, une portion de guidage en forme de came configurée pour pousser le levier anti-rebond vers sa position déployée.
According to one aspect of the invention, an electrical switching device with separable contacts comprises a switching device comprising:
  • a fixed electrical contact and a movable electrical contact movable between a closed position and an open position;
  • a control lever mechanically coupled to the movable electrical contact, the control lever being movable in rotation, about a first axis of rotation, between a first position and a second position, being configured so that the movement of the control lever from the first position towards the second position causing a displacement of the movable contact from the closed position to the open position;
  • an anti-rebound lever, mounted on the control lever by a pivot connection and able to move, thanks to the pivot connection, in rotation about a second axis of rotation parallel to the first axis of rotation, between a rest position and a deployed position, the anti-rebound lever being configured to move from the rest position to the deployed position when the control lever reaches the second position and to cooperate with a stop of the switching device when the anti-rebound lever is in its deployed position and the control lever is in the second position to prevent the control lever from leaving the second position;
  • wherein the switching device has a fixed bearing mounted around the control lever, the anti-rebound lever having a contact portion which contacts an edge of the fixed bearing when the anti-rebound lever is in its home position and which moves along said edge when the control lever rotates around the bearing,
  • and wherein the fixed bearing has, on said edge, a cam-shaped guide portion configured to urge the anti-rebound lever to its deployed position.

Selon des aspects avantageux mais non obligatoires de l'invention, un tel appareil de commutation peut incorporer une ou plusieurs des caractéristiques suivantes, prises isolément ou suivant toute combinaison techniquement admissible :

  • La portion de contact en forme d'excroissance dirigée perpendiculairement au plan du levier anti-rebond.
  • Le palier fixe a une forme d'anneau.
  • Le palier fixe est solidaire d'une armature de l'appareil
  • Le levier anti-rebond s'étend essentiellement dans un plan géométrique perpendiculaire aux premier et deuxième axes de rotation.
  • Le levier anti-rebond comporte un premier lobe et un deuxième lobe reliés entre eux par une partie centrale, la liaison pivot entre le levier anti-rebond et le levier de commande étant formée dans un des lobes du levier anti-rebond.
  • Le levier de commande comporte un premier bras sur lequel est formée la liaison pivot avec le levier anti-rebond et un deuxième bras sur lequel est formée une autre liaison pivot avec une pièce de raccordement connectée au contact mobile pour assurer le couplage entre le levier de commande et le contact mobile, le premier bras et le deuxième bras étant perpendiculaires au premier axe de rotation et étant solidaires d'un arbre de commande de l'appareil s'étendant le long du premier axe de rotation et dans lequel le palier fixe est monté autour dudit arbre de commande.
  • La butée est agencée pour limiter le débattement du levier de commande entre la première position et la deuxième position.
  • La butée est en contact avec le deuxième bras lorsque le levier de commande est dans la deuxième position et en contact avec le premier bras lorsque le levier de commande est dans la première position.
  • L'appareil est un appareil multipolaire comportant un ou plusieurs dispositifs de commutation additionnels similaires au dispositif de commutation, l'appareil comportant également un arbre de commande commun aux dispositifs de commutation pour commander simultanément le déplacement des leviers de commande respectifs des dispositifs de commutation.
According to advantageous but not mandatory aspects of the invention, such a switching device can incorporate one or more of the following characteristics, taken in isolation or in any technically admissible combination:
  • The protuberance-shaped contact portion directed perpendicular to the plane of the anti-rebound lever.
  • The fixed bearing has a ring shape.
  • The fixed bearing is integral with a frame of the device
  • The anti-rebound lever extends essentially in a geometric plane perpendicular to the first and second axes of rotation.
  • The anti-rebound lever comprises a first lobe and a second lobe interconnected by a central part, the pivot connection between the anti-rebound lever and the control lever being formed in one of the lobes of the anti-rebound lever.
  • The control lever comprises a first arm on which is formed the pivot connection with the anti-rebound lever and a second arm on which is formed another pivot connection with a connecting piece connected to the movable contact to ensure the coupling between the control lever. control and the movable contact, the first arm and the second arm being perpendicular to the first axis of rotation and being integral with a control shaft of the apparatus extending along the first axis of rotation and in which the fixed bearing is mounted around said control shaft.
  • The stopper is designed to limit the movement of the control lever between the first position and the second position.
  • The stopper is in contact with the second arm when the control lever is in the second position and in contact with the first arm when the control lever is in the first position.
  • The apparatus is a multipolar apparatus comprising one or more additional switching devices similar to the switching device, the apparatus also comprising a control shaft common to the switching devices for simultaneously controlling the movement of the respective control levers of the switching devices.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un appareil de commutation donnée uniquement à titre d'exemple et faite en référence aux dessins annexés, dans lesquels :

  • [Fig 1] la figure 1 représente schématiquement une vue en coupe d'un appareil de commutation électrique selon des modes de réalisation de l'invention, dans lequel les contacts séparables sont fermés ;
  • [Fig 2] la figure 2 représente schématiquement l'appareil de la figure 1, dans lequel les contacts séparables sont ouverts ;
  • [Fig 3] la figure 3 représente schématiquement l'appareil de la figure 1, dans lequel les contacts séparables sont ouverts et dans lequel un levier anti-rebond est déplacé dans sa position déployée.
The invention will be better understood and other advantages thereof will emerge more clearly in the light of the following description of an embodiment of a switching device given solely by way of example and made with reference. to the accompanying drawings, in which:
  • [ Fig 1 ] the figure 1 schematically shows a sectional view of an electrical switching apparatus according to embodiments of the invention, in which the separable contacts are closed;
  • [ Fig 2 ] the figure 2 schematically represents the device of the figure 1 , wherein the separable contacts are open;
  • [ Fig 3 ] the figure 3 schematically represents the device of the figure 1 , in which the separable contacts are open and in which an anti-rebound lever is moved to its deployed position.

Les figures 1 à 3 représentent un appareil 2 de commutation électrique, tel qu'un contacteur, ou un disjoncteur, ou un relais, par exemple destiné à être raccordé à une installation de distribution d'électricité.The figures 1 to 3 show an electrical switching device 2, such as a contactor, or a circuit breaker, or a relay, for example intended to be connected to an electricity distribution installation.

L'appareil 2 comporte un dispositif de commutation 4 à contacts séparables et un mécanisme de commutation couplé aux contacts séparables du dispositif 4 pour commuter entre des états ouvert et fermé, par exemple en réponse à un ordre de déclenchement envoyé depuis un déclencheur ou depuis un organe de commande.The apparatus 2 comprises a switching device 4 with separable contacts and a switching mechanism coupled to the separable contacts of the device 4 for switching between open and closed states, for example in response to a trip command sent from a trip unit or from a device. control organ.

Dans cet exemple, seul un pôle de l'appareil 2 est décrit. Toutefois, selon des modes de mise en oeuvre, l'appareil 2 est un appareil multipolaire et comporte plusieurs pôles, chacun incluant un dispositif 4 similaire à celui décrit. Dans ce cas, la description du dispositif 4 est transposable aux autres pôles de l'appareil 2.In this example, only one pole of the device 2 is described. However, according to some embodiments, the device 2 is a multipolar device and comprises several poles, each including a device 4 similar to that described. In this case, the description of device 4 can be transposed to the other poles of device 2.

Par exemple, l'appareil 2 comporte trois ou quatre pôles pour être raccordé à une installation triphasée. Dans d'autres cas, l'appareil 2 peut comporter un seul pôle.For example, device 2 has three or four poles to be connected to a three-phase installation. In other cases, the device 2 may have a single pole.

Le dispositif 4 comporte un contact électrique fixe 6 et un contact électrique mobile 8, raccordés à des terminaux de connexion respectifs de l'appareil 2.The device 4 comprises a fixed electrical contact 6 and a mobile electrical contact 8, connected to respective connection terminals of the device 2.

Le contact mobile 8 est déplaçable entre une position de fermeture et une position d'ouverture par rapport au contact fixe 6 pour, respectivement, autoriser et empêcher la circulation d'un courant électrique entre les contacts 6 et 8.The movable contact 8 is movable between a closed position and an open position relative to the fixed contact 6 to, respectively, allow and prevent the flow of an electric current between the contacts 6 and 8.

Par exemple, le contact mobile 8 est monté pivotant par rapport à un support fixe 10 du dispositif 4 et se déplace entre les positions d'ouverture et de fermeture par rotation autour d'un axe de rotation X8.For example, the movable contact 8 is mounted to pivot relative to a fixed support 10 of the device 4 and moves between the open and closed positions by rotation about an axis of rotation X8.

Le contact mobile 8 est illustré dans la position de fermeture sur la figure 1 et dans la position d'ouverture sur les figures 2 et 3.The movable contact 8 is shown in the closed position on the figure 1 and in the open position on the figures 2 and 3 .

Selon des exemples, comme illustré sur la figure 2, le dispositif 4 comporte des pastilles de contact 12 et 14 électriquement conductrices montées respectivement sur le contact fixe 6 et le contact mobile 8.According to examples, as shown in the figure 2 , the device 4 comprises electrically conductive contact pads 12 and 14 respectively mounted on the fixed contact 6 and the movable contact 8.

Par exemple, le contact mobile 8 comprend un ou plusieurs doigts de contact 16 montés pivotants par rapport au contact 8, chaque doigt de contact 16 portant une des pastilles de contact 14.For example, the movable contact 8 comprises one or more contact fingers 16 mounted to pivot relative to the contact 8, each contact finger 16 carrying one of the contact pads 14.

Le dispositif 4 comporte en outre un levier de commande 18 couplé mécaniquement au contact électrique mobile 8.The device 4 further comprises a control lever 18 mechanically coupled to the movable electrical contact 8.

Le levier de commande 18 est mobile en rotation autour d'un axe de rotation X18 parallèle à l'axe X8, entre une première position et une deuxième position.The control lever 18 is movable in rotation about an axis of rotation X18 parallel to the axis X8, between a first position and a second position.

Le levier de commande 18 est dans la première position sur la figure 1 et dans la deuxième position sur les figures 2 et 3.The control lever 18 is in the first position on the figure 1 and in the second position on figures 2 and 3 .

Par exemple, le déplacement du levier de commande 18 depuis la première position vers la deuxième position entraîne un déplacement du contact mobile 8 depuis la position de fermeture vers sa position d'ouverture.For example, the movement of the control lever 18 from the first position to the second position causes a movement of the movable contact 8 from the closed position to its open position.

Réciproquement, le déplacement du levier de commande 18 depuis la deuxième position vers la première position entraîne un déplacement du contact mobile 8 depuis la position d'ouverture vers sa position de fermeture.Conversely, the movement of the control lever 18 from the second position to the first position causes a movement of the movable contact 8 from the open position to its closed position.

Dans l'exemple illustré, le levier de commande 18 est mobile par rapport à une armature 20 de l'appareil 2. Le levier de commande 18 est couplé mécaniquement au contact mobile 8 par l'intermédiaire d'une pièce de raccordement 22, ici ayant une forme rectiligne.In the example illustrated, the control lever 18 is movable relative to a frame 20 of the device 2. The control lever 18 is mechanically coupled to the movable contact 8 via a connecting piece 22, here having a rectilinear shape.

Selon des exemples, la pièce de raccordement 22 est montée pivotante par rapport au contact mobile 8 par une première liaison pivot d'axe de rotation X22 et est également montée pivotante par rapport au levier de commande 18 par une deuxième liaison pivot d'axe X23. Les axes X22 et X23 sont parallèles.According to examples, the connection piece 22 is mounted to pivot relative to the movable contact 8 by a first pivot connection of axis of rotation X22 and is also mounted to pivot relative to the control lever 18 by a second pivot connection of axis X23 . The X22 and X23 axes are parallel.

D'autres dispositions peuvent être utilisées pour coupler mécaniquement le levier de commande 18 au contact mobile 8.Other arrangements can be used to mechanically couple the control lever 18 to the movable contact 8.

Selon des modes de mise en œuvre, le levier de commande 18 fait partie d'un arbre de commande, aussi nommé arbre des pôles, aligné avec l'axe X18 et pouvant tourner autour de l'axe X18. L'arbre de commande est par exemple couplé avec le mécanisme de déclenchement de l'appareil 2.According to embodiments, the control lever 18 forms part of a control shaft, also called the pole shaft, aligned with the axis X18 and capable of rotating around the axis X18. The control shaft is for example coupled with the trigger mechanism of the device 2.

Le levier de commande 18 est solidaire avec l'arbre en rotation autour de l'axe X18. Par exemple, le levier de commande 18 est formé par une ou plusieurs cames de l'arbre de commande.The control lever 18 is integral with the shaft rotating about the axis X18. For example, the control lever 18 is formed by one or more cams of the control shaft.

Dans l'exemple illustré, le levier de commande 18 comporte un premier bras et un deuxième bras, non référencés mais visibles sur les figures 1 à 3.In the example illustrated, the control lever 18 comprises a first arm and a second arm, not referenced but visible on the figures 1 to 3 .

Le premier bras et le deuxième bras sont perpendiculaires à l'axe X18 et sont solidaires de l'arbre de commande. Lesdits bras s'étendent en saillie radialement par rapport à l'arbre de commande. Lesdits bras sont ici de forme essentiellement plane et s'étendent dans un plan géométrique perpendiculaire à l'axe X18.The first arm and the second arm are perpendicular to the axis X18 and are integral with the control shaft. Said arms extend radially projecting from the control shaft. Said arms are here of essentially planar shape and extend in a geometric plane perpendicular to the axis X18.

En variante, d'autres configurations du levier de commande 18 peuvent être envisagées.As a variant, other configurations of the control lever 18 can be envisaged.

Selon des variantes, dans le cas où l'appareil 2 comporte plusieurs pôles, l'arbre de commande est de préférence commun aux dispositifs de commutation 4 des différents pôles de sorte à pouvoir commander simultanément le déplacement des leviers de commande 26 respectifs de ces dispositifs 4.According to variants, in the case where the apparatus 2 comprises several poles, the control shaft is preferably common to the switching devices 4 of the different poles so as to be able to simultaneously control the movement of the respective control levers 26 of these devices. 4.

Par exemple, chaque pôle de l'appareil 2 est associé à un compartiment dédié dans un boîtier de l'appareil 2. Les compartiments sont alignés côte à côte le long de l'axe X18. L'arbre de commande traverse les parois latérales séparant deux compartiments voisins par des orifices de passage dédiés.For example, each pole of the device 2 is associated with a dedicated compartment in a housing of the device 2. The compartments are aligned side by side along the axis X18. The drive shaft passes through the side walls separating two neighboring compartments by dedicated passage orifices.

Le dispositif 4 comprend aussi une butée 24 fixe, par exemple montée fixement sur l'armature 20 et dont le rôle est explicité dans ce qui suit. Par exemple, la butée 24 comporte une tige ou une excroissance rigide faisant saillie par rapport à l'armature 20 en s'étendant parallèlement à l'axe X18.The device 4 also comprises a fixed stop 24, for example fixedly mounted on the frame 20 and whose role is explained in what follows. For example, the stop 24 comprises a rod or a rigid protuberance projecting relative to the frame 20 extending parallel to the axis X18.

Selon des exemples, la butée 24 limite le déplacement du levier de commande 18 entre la première position et la deuxième position en entrant en contact avec les premier et deuxième bras de manière à bloquer la rotation de l'arbre.According to examples, the stop 24 limits the movement of the control lever 18 between the first position and the second position by coming into contact with the first and second arms so as to block the rotation of the shaft.

Plus précisément, la butée 24 est ici en contact avec le premier bras lorsque le levier de commande 18 est dans la deuxième position, pour empêcher le levier de commande 18 de poursuivre son mouvement au-delà de la deuxième position. La butée 24 est en contact avec le deuxième bras lorsque le levier de commande 18 est dans la première position, pour empêcher le levier de commande 18 de tourner, dans le sens opposé, au-delà de la première position. En variante, dans la première position, le bord du deuxième bras peut être très proche de la butée 24 sans pour autant être directement en contact avec la butée 24.More precisely, the stop 24 is here in contact with the first arm when the control lever 18 is in the second position, to prevent the control lever 18 from continuing its movement beyond the second position. The stopper 24 is in contact with the second arm when the control lever 18 is in the first position, to prevent the control lever 18 from rotating, in the opposite direction, beyond the first position. As a variant, in the first position, the edge of the second arm can be very close to the stop 24 without however being directly in contact with the stop 24.

Ainsi, dans cet exemple, la butée 24 est agencée pour limiter le débattement du levier de commande 18 à la fois entre la première position et la deuxième position.Thus, in this example, the stop 24 is arranged to limit the movement of the control lever 18 both between the first position and the second position.

Le dispositif 4 comporte également un levier anti-rebond 26, monté sur le levier de commande 18 par une liaison pivot. Le levier de commande 18 peut se déplacer, par rapport au levier de commande 18, grâce à la liaison pivot, en rotation autour d'un axe de rotation X26, entre une position de repos, aussi nommée position rétractée, et une position déployée.The device 4 also comprises an anti-rebound lever 26, mounted on the control lever 18 by a pivot link. The control lever 18 can move, relative to the control lever 18, thanks to the pivot connection, in rotation about an axis of rotation X26, between a rest position, also called a retracted position, and a deployed position.

L'axe X26 est solidaire du levier de commande 18 et est parallèle à l'axe X18. En d'autres termes, l'axe X26 et la liaison pivot correspondante se déplacent avec le levier de commande 18.The axis X26 is integral with the control lever 18 and is parallel to the axis X18. In other words, the axis X26 and the corresponding pivot link move with the control lever 18.

Dans la position de repos, le levier de commande 26 n'entrave pas le mouvement du levier de commande 18. Par exemple, le levier anti-rebond 26 est alors replié sur un corps du levier de commande 18.In the rest position, the control lever 26 does not impede the movement of the control lever 18. For example, the anti-rebound lever 26 is then folded over a body of the control lever 18.

Le levier anti-rebond 26 est agencé pour coopérer avec la butée 24 lorsqu'il est dans sa position déployée et lorsque le levier de commande 18 est dans la deuxième position, de sorte à empêcher le levier de commande 18 de quitter la deuxième position.The anti-rebound lever 26 is arranged to cooperate with the stop 24 when it is in its deployed position and when the control lever 18 is in the second position, so as to prevent the control lever 18 from leaving the second position.

Le levier anti-rebond 26 est en outre agencé pour se déplacer depuis sa position de repos vers sa position déployée lorsque le levier de commande 18 atteint la deuxième position à l'issue d'un déplacement depuis la première position.The anti-rebound lever 26 is further arranged to move from its rest position to its deployed position when the control lever 18 reaches the second position after movement from the first position.

Dans l'exemple illustré, le levier anti-rebond 26 présente une forme plate et arrondie et comporte une portion de contact 28.In the example illustrated, the anti-rebound lever 26 has a flat and rounded shape and comprises a contact portion 28.

Par exemple, la portion de contact 28 a une forme d'excroissance, telle qu'une tige ou une goupille. La portion de contact 28 s'étend perpendiculairement au plan du levier anti-rebond 26, c'est-à-dire dirigée parallèlement à la direction du premier axe de rotation X18.For example, the contact portion 28 has the shape of a protuberance, such as a rod or a pin. The contact portion 28 extends perpendicularly to the plane of the anti-rebound lever 26, that is to say directed parallel to the direction of the first axis of rotation X18.

Dans les exemples décrits, lorsque le levier de commande 18 est dans la deuxième position et que le levier anti-rebond 26 est déployé, le premier bras et le levier anti-rebond 26 sont situés de part et d'autre de la butée 24, au voisinage immédiat de la butée 24, voire même en contact direct avec la butée 24. Ainsi, le déplacement du levier de commande 18 (et donc de l'arbre) est rendu impossible tant que le levier anti-rebond 26 reste dans sa position déployée.In the examples described, when the control lever 18 is in the second position and the anti-rebound lever 26 is deployed, the first arm and the anti-rebound lever 26 are located on either side of the stop 24, in the immediate vicinity of the stop 24, or even in direct contact with the stop 24. Thus, the movement of the control lever 18 (and therefore of the shaft) is made impossible as long as the anti-rebound lever 26 remains in its deployed position.

En pratique, le premier bras et le levier anti-rebond 26 ne sont pas nécessairement constamment tous deux en contact direct avec la butée 24, de sorte qu'un faible débattement au voisinage de la deuxième position peut être autorisé dans un tel cas pour le levier de commande 18.In practice, the first arm and the anti-rebound lever 26 are not necessarily both constantly in direct contact with the stop 24, so that a small displacement in the vicinity of the second position may be allowed in such a case for the control lever 18.

Selon des modes de mise en œuvre, la liaison pivot reliant la pièce 22 au levier de commande 18 est montée sur le premier bras. La liaison pivot reliant le levier de commande 18 au levier anti-rebond 26 est montée sur le deuxième bras.According to embodiments, the pivot link connecting the part 22 to the control lever 18 is mounted on the first arm. The pivot link connecting the control lever 18 to the anti-rebound lever 26 is mounted on the second arm.

Les premier et deuxième bras sont ici reliés par une portion arrondie en forme d'arc de cercle centré sur l'axe X18. Dans la position repliée, le levier anti-rebond 26 recouvre la portion arrondie et le bord supérieur du levier anti-rebond 26 est aligné avec le bord extérieur de la portion arrondie. Le levier anti-rebond 26 ne dépasse alors pas de la portion arrondie, de manière à ne pas entraver le déplacement du levier de commande 18 et de l'arbre.The first and second arms are here connected by a rounded portion in the form of an arc of a circle centered on the axis X18. In the folded position, the anti-rebound lever 26 covers the rounded portion and the upper edge of the anti-rebound lever 26 is aligned with the outer edge of the rounded portion. The anti-rebound lever 26 then does not protrude from the rounded portion, so as not to hinder the movement of the control lever 18 and of the shaft.

Le dispositif de commutation 4 comporte en outre un palier fixe 30 monté autour du levier de commande 18.The switching device 4 further comprises a fixed bearing 30 mounted around the control lever 18.

Par exemple, le palier 30 est monté autour de l'arbre de commande du levier de commande 18.For example, the bearing 30 is mounted around the control shaft of the control lever 18.

Selon des exemples, le palier 30 a une forme d'anneau centré sur l'axe de rotation X18.According to examples, the bearing 30 has the shape of a ring centered on the axis of rotation X18.

Dans un exemple donné à titre illustratif et non nécessairement limitatif, le diamètre du palier 30 est supérieur ou égal à 15mm ou à 20mm.In an example given by way of illustration and not necessarily limiting, the diameter of the bearing 30 is greater than or equal to 15mm or to 20mm.

Le palier 30 peut être réalisé en métal, tel que du bronze, ou en polymère durci, ou dans tout matériau approprié.The bearing 30 can be made of metal, such as bronze, or of hardened polymer, or of any suitable material.

Dans l'exemple illustré, le palier 30 est solidaire de l'armature 20 de l'appareil 2, par exemple grâce à une pièce de liaison 32 montée sur l'armature 20. Par exemple, le palier 30 comporte une portion de raccordement 36 en forme de lobe à laquelle est connectée la pièce de liaison 32.In the example illustrated, the bearing 30 is integral with the frame 20 of the device 2, for example by virtue of a connecting piece 32 mounted on the frame 20. For example, the bearing 30 comprises a connecting portion 36 lobe-shaped to which the connecting piece 32 is connected.

Selon des modes de réalisation, le levier anti-rebond 26 et le palier 30 sont configurés de telle sorte que la portion de contact 28 est en contact contre un bord du palier 30 lorsque le levier anti-rebond 26 est dans sa position de repos et que la portion de contact 28 se déplace le long dudit bord lorsque le levier de commande 18 tourne autour du palier 30.According to embodiments, the anti-rebound lever 26 and the bearing 30 are configured such that the contact portion 28 contacts an edge of the bearing 30 when the anti-rebound lever 26 is in its rest position and that the contact portion 28 moves along said edge as the control lever 18 rotates around the bearing 30.

Avantageusement, la portion de contact 28 est maintenue en contact direct contre le bord du palier 30 sous l'effet d'un organe de rappel élastique, tel qu'un ressort de torsion, qui tends à ramener le levier anti-rebond 26 vers sa position de repos. Le ressort de torsion est par exemple monté associé au levier anti-rebond 26.Advantageously, the contact portion 28 is maintained in direct contact against the edge of the bearing 30 under the effect of an elastic return member, such as a torsion spring, which tends to return the anti-rebound lever 26 to its rest position. The torsion spring is for example mounted associated with the anti-rebound lever 26.

Le palier 30 comporte, sur ledit bord, une portion de guidage 34 en forme de came configurée pour pousser le levier anti-rebond 26 vers sa position déployée.The bearing 30 comprises, on said edge, a guide portion 34 in the form of a cam configured to push the anti-rebound lever 26 towards its deployed position.

Par exemple, le bord du palier 30 comporte une partie inclinée qui localement s'éloigne radialement de l'axe de rotation X18 pour former au moins une première partie de la portion de guidage 34.For example, the edge of the bearing 30 comprises an inclined part which locally moves away radially from the axis of rotation X18 to form at least a first part of the guide portion 34.

Un exemple du fonctionnement du dispositif 4 est maintenant décrit en référence aux figures 1 à 3.An example of the operation of the device 4 is now described with reference to figures 1 to 3 .

Initialement, le dispositif 4 est dans l'état fermé, comme illustré sur la figure 1. Les parties conductrices des contacts 6 et 8 se touchent et le courant électrique peut circuler.Initially, device 4 is in the closed state, as illustrated in figure 1 . The conductive parts of contacts 6 and 8 touch each other and electric current can flow.

Le levier de commande 18 est dans la première position. Par exemple un bord du deuxième bras est en contact avec la butée 24, ou très proche de la butée 24, par exemple à une distance de moins de cinq millimètres de la butée 24. Le levier anti-rebond 26 est dans la position de repos.The control lever 18 is in the first position. For example an edge of the second arm is in contact with the stop 24, or very close to the stop 24, for example at a distance of less than five millimeters from the stop 24. The anti-rebound lever 26 is in the rest position. .

Ensuite, le mécanisme de commutation est déclenché pour ouvrir le dispositif 4, c'est-à-dire pour séparer les contacts 6 et 8 et pour interrompre le courant.Then the switching mechanism is triggered to open the device 4, that is to say to separate the contacts 6 and 8 and to interrupt the current.

Pour cela, le levier de commande 18 est mis en rotation autour de l'axe X18, par exemple en tournant l'arbre dans un premier sens de rotation, illustré par la flèche F1 sur la figure 2. Ce mouvement est transmis par la pièce 22 au contact mobile 8 qui tourne alors autour de l'axe X8 dans un deuxième sens de rotation, illustré par la flèche F2. A ce stade, le levier anti-rebond 26 reste dans la position de repos, c'est-à-dire qu'il reste immobile par rapport au levier de commande 18.For this, the control lever 18 is rotated around the axis X18, for example by turning the shaft in a first direction of rotation, illustrated by the arrow F1 on the figure. figure 2 . This movement is transmitted by the part 22 to the movable contact 8 which then rotates around the axis X8 in a second direction of rotation, illustrated by the arrow F2. At this point, the anti-rebound lever 26 remains in the rest position, i.e. it remains stationary relative to the control lever 18.

Cependant, le levier anti-rebond 26 tourne avec le levier de commande 28 autour de l'axe de rotation X18 par rapport au palier fixe 30. Ce faisant, la portion de contact 28 suit le bord du palier 30, par exemple en glissant au contact le long de ce bord.However, the anti-rebound lever 26 rotates with the control lever 28 about the axis of rotation X18 relative to the fixed bearing 30. In doing so, the contact portion 28 follows the edge of the bearing 30, for example by sliding downwards. contact along this edge.

Lorsque la portion de contact 28 rencontre la portion de guidage 34, elle est poussée radialement par la portion de guidage 34, ce qui la force à s'éloigner de l'axe de rotation X18 et amorce le déplacement du levier anti-rebond 26 vers la position déployée.When the contact portion 28 meets the guide portion 34, it is pushed radially by the guide portion 34, which forces it to move away from the axis of rotation X18 and initiates the movement of the anti-rebound lever 26 towards the deployed position.

Le levier anti-rebond 26 continue ensuite son déplacement vers la position déployée sous l'effet de la force centrifuge due à la rotation du levier de commande 18. Par exemple, cette force centrifuge est suffisante pour surpasser l'effort de rappel exercé par l'organe de rappel.The anti-rebound lever 26 then continues its movement towards the deployed position under the effect of the centrifugal force due to the rotation of the control lever 18. For example, this centrifugal force is sufficient to exceed the return force exerted by the recall body.

En parallèle, le mouvement de rotation du levier de commande 18 se poursuit jusqu'à ce que le levier de commande 18 atteigne la deuxième position, c'est-à-dire qu'il arrive en fin de course. La fin de course correspond ici à la position dans laquelle le premier bras entre en contact avec la butée 24, comme illustré sur la figure 2.In parallel, the rotational movement of the control lever 18 continues until the control lever 18 reaches the second position, that is to say it reaches the end of its travel. The limit switch here corresponds to the position in which the first arm comes into contact with the stop 24, as illustrated in figure 2 .

En pratique, lorsque le levier de commande 18 arrive dans sa deuxième position en fin de course, il est susceptible, du fait de sa vitesse, de rebondir puis de se déplacer en sens inverse vers sa première position.In practice, when the control lever 18 arrives in its second position at the end of its travel, it is liable, because of its speed, to rebound and then to move in the opposite direction towards its first position.

Dans l'exemple illustré, le premier bras percute la butée 24 lorsqu'il arrive en fin de course. Sur la figure 3, le levier de commande 18 a d'ailleurs commencé à quitter la deuxième position et le premier bras a commencé à s'éloigner faiblement de la butée 24.In the example illustrated, the first arm strikes the stop 24 when it reaches the end of its travel. On the figure 3 , the control lever 18 has also started to leave the second position and the first arm has started to move away slightly from the stop 24.

Une fois que le levier anti-rebond 26 est déployé et en contact contre la butée 24, le levier de commande 18 ne peut plus continuer à s'éloigner de la deuxième position, ce qui empêche une réouverture accidentelle des contacts 6 et 8.Once the anti-rebound lever 26 is deployed and in contact with the stopper 24, the control lever 18 can no longer continue to move away from the second position, which prevents accidental reopening of the contacts 6 and 8.

Avantageusement, la position de la portion de guidage 34 sur le palier 30, qui détermine la position angulaire à partir de laquelle la portion de contact 28 commence à être poussée radialement à l'écart de l'axe de rotation X18 au fur et à mesure que le levier anti-rebond 26 tourne autour de l'axe de rotation 18, est choisie en fonction de la position angulaire de la butée 24, de manière à ce que le déplacement du levier anti-rebond 26 vers sa position déployée commence et se termine avant que le levier de commande 18 arrive en butée contre la butée 24.Advantageously, the position of the guide portion 34 on the bearing 30, which determines the angular position from which the contact portion 28 begins to be pushed radially away from the axis of rotation X18 as and when that the anti-rebound lever 26 rotates about the axis of rotation 18, is chosen according to the angular position of the stopper 24, so that the movement of the anti-rebound lever 26 to its deployed position begins and continues ends before the control lever 18 comes into abutment against the stop 24.

Une fois déployé, le levier anti-rebond 26 empêche le levier de commande 18 de quitter sa deuxième position, en coopérant avec la butée 24, même si le levier de commande 18 rebondit contre la butée et a commencé à s'en éloigner, comme c'est le cas ici. Le levier de commande 18 reste alors au voisinage de la deuxième position. Le contact 8 ne peut donc pas se refermer accidentellement.Once deployed, the anti-rebound lever 26 prevents the control lever 18 from leaving its second position, by cooperating with the stopper 24, even if the control lever 18 rebounds against the stopper and has started to move away from it, as this is the case here. The control lever 18 then remains in the vicinity of the second position. Contact 8 therefore cannot accidentally close.

Ainsi, le risque de fermeture accidentelle du contact mobile 8 est réduit. Le fonctionnement de l'appareil 2 est donc plus sûr.Thus, the risk of accidental closing of the movable contact 8 is reduced. The operation of the device 2 is therefore more secure.

En particulier, le déplacement du levier anti-rebond 26 n'est pas tributaire de la vitesse de rotation du levier de commande 18. En particulier, la portion de guidage 34 permet d'amorcer le déplacement du levier anti-rebond 26 vers sa position déployée même lorsque la force centrifuge résultant de la rotation du levier de commande 18 n'est pas suffisante pour initier ce mouvement.In particular, the movement of the anti-rebound lever 26 is not dependent on the speed of rotation of the control lever 18. In particular, the guide portion 34 makes it possible to initiate the movement of the anti-rebound lever 26 towards its position. deployed even when the centrifugal force resulting from the rotation of the control lever 18 is not sufficient to initiate this movement.

Le risque de réouverture accidentelle du contact 8 est donc réduit, indépendamment des circonstances dans lesquelles se produit le déclenchement, même lorsque le levier de commande 18 se déplace lentement.The risk of accidental reopening of the contact 8 is therefore reduced, regardless of the circumstances in which the triggering occurs, even when the control lever 18 moves slowly.

En outre, le levier anti-rebond 26 est facile à intégrer dans l'appareil 2 sans qu'il ne soit nécessaire de modifier complètement l'architecture du dispositif 4.In addition, the anti-rebound lever 26 is easy to integrate into the device 2 without having to completely modify the architecture of the device 4.

En pratique, le levier anti-rebond 26 peut ensuite être ramené vers sa position de repos, par exemple une fois que le levier de commande 18 s'est immobilisé dans la deuxième position. Le retour vers la position de repos peut être réalisé manuellement ou par gravité ou par un l'organe de rappel élastique.In practice, the anti-rebound lever 26 can then be returned to its rest position, for example once the control lever 18 is immobilized in the second position. The return to the rest position can be carried out manually or by gravity or by an elastic return member.

Les modes de réalisation et les variantes envisagés ci-dessus peuvent être combinés entre eux pour générer de nouveaux modes de réalisation.The embodiments and the variants considered above can be combined with one another to generate new embodiments.

Claims (10)

Appareil de commutation électrique (2) à contacts séparables, comprenant un dispositif de commutation (4) comportant : - un contact électrique fixe (6) et un contact électrique mobile (8) déplaçable entre une position de fermeture et une position d'ouverture ; - un levier de commande (18) couplé mécaniquement au contact électrique mobile (8), le levier de commande étant mobile en rotation, autour d'un premier axe de rotation (X18), entre une première position et une deuxième position, en étant configuré pour que le déplacement du levier de commande (18) depuis la première position vers la deuxième position entraînant un déplacement du contact mobile (8) depuis la position de fermeture vers la position d'ouverture ; - un levier anti-rebond (26), monté sur le levier de commande (18) par une liaison pivot et pouvant se déplacer, grâce à la liaison pivot, en rotation autour d'un deuxième axe de rotation (X26) parallèle au premier axe de rotation (X18), entre une position de repos et une position déployée ; le levier anti-rebond (26) étant configuré pour se déplacer depuis la position de repos vers la position déployée lorsque le levier de commande (18) atteint la deuxième position et pour coopérer avec une butée (24) du dispositif de commutation (4) lorsque le levier anti-rebond (26) est dans sa position déployée et que le levier de commande (18) est dans la deuxième position pour empêcher le levier de commande (18) de quitter la deuxième position ;
caractérisé en ce que le dispositif de commutation (4) comporte un palier fixe (30) monté autour du levier de commande (18), le levier anti-rebond (26) comportant une portion de contact (28) qui est en contact contre un bord du palier fixe (30) lorsque le levier anti-rebond (26) est dans sa position de repos et qui se déplace le long dudit bord lorsque le levier de commande (18) tourne autour du palier (30),
et en ce que le palier fixe (30) comporte, sur ledit bord, une portion de guidage (34) en forme de came configurée pour pousser le levier anti-rebond (26) vers sa position déployée. Electrical switching device (2) with separable contacts, comprising a switching device (4) comprising: - a fixed electrical contact (6) and a movable electrical contact (8) movable between a closed position and an open position; - a control lever (18) mechanically coupled to the movable electrical contact (8), the control lever being movable in rotation, about a first axis of rotation (X18), between a first position and a second position, being configured so that movement of the control lever (18) from the first position to the second position causing movement of the movable contact (8) from the closed position to the open position; - an anti-rebound lever (26), mounted on the control lever (18) by a pivot connection and able to move, thanks to the pivot connection, in rotation about a second axis of rotation (X26) parallel to the first axis of rotation (X18), between a rest position and a deployed position; the anti-rebound lever (26) being configured to move from the rest position to the deployed position when the control lever (18) reaches the second position and to cooperate with a stop (24) of the switching device (4) when the anti-rebound lever (26) is in its deployed position and the control lever (18) is in the second position to prevent the control lever (18) from leaving the second position;
characterized in that the switching device (4) comprises a fixed bearing (30) mounted around the control lever (18), the anti-rebound lever (26) having a contact portion (28) which is in contact against a edge of the fixed bearing (30) when the anti-rebound lever (26) is in its rest position and which moves along said edge when the control lever (18) rotates around the bearing (30),
and in that the fixed bearing (30) has, on said edge, a cam-shaped guide portion (34) configured to urge the anti-rebound lever (26) to its deployed position. Appareil selon la revendication 1, dans lequel la portion de contact (28) en forme d'excroissance dirigée perpendiculairement au plan du levier anti-rebond (26).Apparatus according to claim 1, wherein the protrusion-shaped contact portion (28) directed perpendicular to the plane of the anti-rebound lever (26). Appareil selon l'une quelconque des revendications précédentes, dans lequel le palier fixe (30) a une forme d'anneau.Apparatus according to any preceding claim, wherein the fixed bearing (30) is in the form of a ring. Appareil selon l'une quelconque des revendications précédentes, dans lequel le palier fixe (30) est solidaire d'une armature (20) de l'appareil (2)Apparatus according to any preceding claim, wherein the fixed bearing (30) is integral with a frame (20) of the apparatus (2) Appareil selon l'une quelconque des revendications précédentes, dans lequel le levier anti-rebond (26) s'étend essentiellement dans un plan géométrique perpendiculaire aux premier et deuxième axes de rotation (X18, X26).Apparatus according to any preceding claim, wherein the anti-rebound lever (26) extends substantially in a geometric plane perpendicular to the first and second axes of rotation (X18, X26). Appareil selon l'une quelconque des revendications précédentes, dans lequel le levier anti-rebond (26) comporte un premier lobe (40) et un deuxième lobe (42) reliés entre eux par une partie centrale, la liaison pivot entre le levier anti-rebond et le levier de commande étant formée dans un des lobes du levier anti-rebond.Apparatus according to any preceding claim, wherein the anti-rebound lever (26) has a first lobe (40) and a second lobe (42) interconnected by a central portion, the pivot connection between the anti-rebound lever. rebound and the control lever being formed in one of the lobes of the anti-rebound lever. Appareil selon l'une quelconque des revendications précédentes, dans lequel le levier de commande (18) comporte un premier bras sur lequel est formée la liaison pivot avec le levier anti-rebond (26) et un deuxième bras sur lequel est formée une autre liaison pivot avec une pièce de raccordement (22) connectée au contact mobile (8) pour assurer le couplage entre le levier de commande (18) et le contact mobile (8), le premier bras et le deuxième bras étant perpendiculaires au premier axe de rotation (X18) et étant solidaires d'un arbre de commande de l'appareil s'étendant le long du premier axe de rotation (X18) et dans lequel le palier fixe (30) est monté autour dudit arbre de commande.Apparatus according to any one of the preceding claims, wherein the control lever (18) comprises a first arm on which is formed the pivot connection with the anti-rebound lever (26) and a second arm on which is formed a further connection. pivot with a connecting piece (22) connected to the movable contact (8) to ensure the coupling between the control lever (18) and the movable contact (8), the first arm and the second arm being perpendicular to the first axis of rotation (X18) and being integral with a control shaft of the apparatus extending along the first axis of rotation (X18) and in which the fixed bearing (30) is mounted around said control shaft. Appareil selon l'une quelconque des revendications précédentes, dans lequel la butée (24) est agencée pour limiter le débattement du levier de commande (18) entre la première position et la deuxième position.Apparatus according to any preceding claim, wherein the stopper (24) is arranged to limit the travel of the control lever (18) between the first position and the second position. Appareil selon les revendications 7 et 8, dans lequel la butée (24) est en contact avec le deuxième bras lorsque le levier de commande (18) est dans la deuxième position et en contact avec le premier bras lorsque le levier de commande (18) est dans la première position.Apparatus according to claims 7 and 8, wherein the stopper (24) is in contact with the second arm when the control lever (18) is in the second position and in contact with the first arm when the control lever (18) is in the first position. Appareil selon l'une quelconque des revendications précédentes, dans lequel l'appareil (2) est un appareil multipolaire comportant un ou plusieurs dispositifs de commutation additionnels similaires au dispositif de commutation (4), l'appareil comportant également un arbre de commande (34) commun aux dispositifs de commutation pour commander simultanément le déplacement des leviers de commande (18) respectifs des dispositifs de commutation (4).Apparatus according to any one of the preceding claims, wherein the apparatus (2) is a multipolar apparatus comprising one or more additional switching devices similar to the switching device (4), the apparatus also comprising a drive shaft (34 ) common to the switching devices for simultaneously controlling the movement of the respective control levers (18) of the switching devices (4).
EP20195643.0A 2019-09-12 2020-09-11 Electrical switching apparatus with separable contacts Active EP3792949B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1910070A FR3100921B1 (en) 2019-09-12 2019-09-12 Electrical switching device with separable contacts

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EP3792949A1 true EP3792949A1 (en) 2021-03-17
EP3792949B1 EP3792949B1 (en) 2022-06-08

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US (1) US11062858B2 (en)
EP (1) EP3792949B1 (en)
KR (1) KR20210031612A (en)
CN (1) CN112490028A (en)
ES (1) ES2918515T3 (en)
FR (1) FR3100921B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089463A2 (en) * 1982-01-29 1983-09-28 Mitsubishi Denki Kabushiki Kaisha Air circuit breaker
EP2801099B1 (en) 2012-01-06 2016-03-23 Schneider Electric Industries SAS Electrical power circuit breaker having an energy storage and a device for the improved indication of the operational state
CN205920942U (en) * 2016-06-07 2017-02-01 上海电器股份有限公司人民电器厂 Circuit breaker prevent resilient mounting
CN107481901A (en) * 2016-06-07 2017-12-15 上海电器股份有限公司人民电器厂 A kind of breaker open operation bounce-proof device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652815A (en) * 1971-01-14 1972-03-28 Westinghouse Electric Corp Circuit interrupter with motor operated spring charging means including two ratchets and two pawls
US4144427A (en) * 1977-07-20 1979-03-13 Gould Inc. Anti-rebound and contact kicker means for circuit breaker
US4114005A (en) * 1977-09-01 1978-09-12 Westinghouse Electric Corp. Circuit breaker spring assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089463A2 (en) * 1982-01-29 1983-09-28 Mitsubishi Denki Kabushiki Kaisha Air circuit breaker
EP2801099B1 (en) 2012-01-06 2016-03-23 Schneider Electric Industries SAS Electrical power circuit breaker having an energy storage and a device for the improved indication of the operational state
CN205920942U (en) * 2016-06-07 2017-02-01 上海电器股份有限公司人民电器厂 Circuit breaker prevent resilient mounting
CN107481901A (en) * 2016-06-07 2017-12-15 上海电器股份有限公司人民电器厂 A kind of breaker open operation bounce-proof device

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FR3100921A1 (en) 2021-03-19
US20210082636A1 (en) 2021-03-18
US11062858B2 (en) 2021-07-13
ES2918515T3 (en) 2022-07-18
CN112490028A (en) 2021-03-12
EP3792949B1 (en) 2022-06-08
KR20210031612A (en) 2021-03-22
FR3100921B1 (en) 2021-09-24

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