EP2743957B1 - Gerät zur Stromunterbrechung, insbesondere Anschluss-Überlastschalter - Google Patents

Gerät zur Stromunterbrechung, insbesondere Anschluss-Überlastschalter Download PDF

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Publication number
EP2743957B1
EP2743957B1 EP20130187808 EP13187808A EP2743957B1 EP 2743957 B1 EP2743957 B1 EP 2743957B1 EP 20130187808 EP20130187808 EP 20130187808 EP 13187808 A EP13187808 A EP 13187808A EP 2743957 B1 EP2743957 B1 EP 2743957B1
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EP
European Patent Office
Prior art keywords
abovementioned
arc
intended
containment
extinguishing
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.)
Active
Application number
EP20130187808
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English (en)
French (fr)
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EP2743957A1 (de
Inventor
Samuel Faure
Jean-Marie Trico
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
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Schneider Electric Industries SAS
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Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2743957A1 publication Critical patent/EP2743957A1/de
Application granted granted Critical
Publication of EP2743957B1 publication Critical patent/EP2743957B1/de
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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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0235—Contacts and the arc extinguishing space inside individual separate cases, which are positioned inside the housing of the circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H2009/347—Stationary parts for restricting or subdividing the arc, e.g. barrier plate using lids for closing the arc chamber after assembly
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H2071/0242—Assembling parts of a circuit breaker by using snap mounting techniques

Definitions

  • the present invention relates to low-voltage electrical power cut-off devices in general, and in particular electrical power cut-off devices installed at home and commonly known as "branch circuit breakers".
  • the part of the housing intended to achieve the confinement of the cutoff comprises two bulb parts referencing the fixed contacts and the magnetothermal trip units. These two bulb parts are themselves referenced on the base which also serves as external face.
  • this base reference other mechanical functions, namely the so-called switch mechanism for the manual operation of the device and the mobile contact support.
  • switch mechanism for the manual operation of the device and the mobile contact support.
  • the seal is obtained during the meeting of two plastic bulb parts constituted by the housing and the lid of the containment room of the cut.
  • the containment piece is made in one piece, this embodiment of the seal is not feasible, for issues of realization of molding parts. Indeed, if the piece is in one piece, it must be drilled to dispose the parts bringing the potential, which prevents to obtain a sufficient seal.
  • the potential above the fin block is brought via a specific metal piece called arc horn, which is soldered to the splitter.
  • the object of the present invention is to propose a device for breaking the electric current of simplified design.
  • the subject of the present invention is an apparatus for breaking electric current, said apparatus being characterized in that the aforementioned conductive part comprises a portion capable of being brought to the aforementioned opening of the interrupting chamber provided in the part. confinement, so as to ensure the aforementioned sealing of the interrupting chamber.
  • this part also ensures the supply of the potential above the aforementioned arc extinguishing device.
  • each unipolar assembly comprises an electric circuit and a splitter adapted to bring the current to the input of said circuit, and the aforementioned conductive part forms a single piece with the splitter, and comprises a first so-called central part capable of providing the current distribution function and a second part able to ensure the aforementioned sealing of the breaking chamber and the supply of the potential above the arc extinguishing device.
  • the aforementioned electrical circuit comprising a magnetic protection device
  • the above-mentioned distributor is intended to ensure the distribution of the current between a calibration shunt of the value of the nominal current and the magnetic protection device.
  • this conductive part comprises a third part situated on the opposite side to the second, and forming an extension part intended to be electrically connected to the braid so as to reduce the length of this braid, between this conductive part and the mobile contact.
  • the aforementioned conductive member is fixed on the confinement piece at the aforementioned opening, by means of detent means provided in part on the conductive part and partly on the confinement part.
  • the aforementioned confinement piece also comprises snap-fastening means for the so-called central portion of the conductive splitter piece on the confinement piece.
  • the containment part of the cutoff also has on its lower face opposite to that receiving the conductive part, an opening for accommodating at least a portion of a support shaft of the movable contacts of the device.
  • the aforementioned confinement part also comprises means for referencing and / or fixing said part on a platinum, said platen being intended to support at least part of the elements of the device.
  • this plate comprises means for referencing a set of parts having a kinematic function, this assembly comprising the above-mentioned control mechanism, the fixed contact (s), the carrier (s) mobile contacts.
  • the only constraints imposed on the platen are therefore a certain mechanical strength and a certain dimensional accuracy while the confinement piece ensures only the confinement and the cut.
  • this apparatus comprises a thermal protection device against prolonged electric current overload and / or a magnetic protection device against instantaneous overcurrent of electric current, and / or a differential protection device in the case of a device.
  • the protection device or devices cooperating with the control mechanism so as to cause the opening of the contacts when the corresponding fault occurs comprises referencing means of at least one of the aforementioned protective devices.
  • the aforementioned confinement part comprises an end portion comprising three walls delimiting a recess of substantially parallelepiped shape intended to house an arc extinguishing device so as to form with the aforementioned plate, a breaking chamber arc, this part having at its upper part, an opening intended to be closed at least partially and in a sealed manner by the aforementioned conductive part, and on its underside, fastening means snap on the aforementioned plate.
  • the aforementioned confinement part comprises a central part comprising on its underside, an opening intended to house a movable contact-carrying shaft (8) of the apparatus, and on its upper face, means for fixing the the second part forming a distributor of the aforementioned conductive part.
  • this device is a branch circuit breaker intended to be located between a meter and an electrical distribution board, so as to connect a particular to the electrical network.
  • FIG. 1 On the figure 1 has been shown a plate P on which are mounted the various elements of an electrical protection device such as a branch circuit breaker allowing an individual to be connected to the electrical network, said circuit breaker being intended to be located between a meter and a table electric.
  • This assembly is intended to be mounted in an insulating housing (not shown), this housing having an opening for the passage of a lever M for the operation of the apparatus and having access openings to input terminals and to output terminals intended to be electrically connected respectively to the meter and to the electrical panel.
  • This device is of the multipole type and mainly comprises a control mechanism 1 and, according to this particular embodiment, four unipolar assemblies 2, 3, 4, 5 comprising three assemblies 2, 3, 4 intended to cut a phase and an assembly.
  • unipolar 5 for the neutral cut each of these sets being associated an input terminal and an output terminal.
  • Each unipolar assembly 2, 3, 4, 5 comprises a fixed contact 6 electrically connected by a conductor to one of the terminals, and a movable contact 7 electrically connected by a flexible conductor to the other of the terminals.
  • This movable contact 7 is supported by a movable contact holder shaft 8 common to all the unipolar assemblies, and adapted to be rotated by a control mechanism 1 between a position in which the fixed and movable contacts 6 and 7 are open. position in which the fixed and mobile contacts are closed.
  • the control of the opening of the contacts can be effected either manually by the operation of a lever M belonging to the control mechanism 1, or automatically by means of a protective device comprising a magnetic protection device 9 against instantaneous overloads of electric current, and a thermal protection device 10 against prolonged overloads of electric current.
  • This apparatus also comprises a differential protection device comprising a differential relay 45 capable of sending an opening command to the control mechanism 1 during an imbalance caused by a receiver having a fault current.
  • Each unipolar phase assembly 2,3,4 comprises an electric circuit comprising, connected in series with the fixed contacts 6, 7 and movable, a thermal protection device 10 and a magnetic protection device 9.
  • These two protection devices 9, 10 each comprise an actuator adapted to act on a so-called transfer bar 11, said bar extending substantially parallel to the alignment direction of the unipolar assemblies 2,3,4 and being intended to transmit the tripping order to the bar triggering circuit said first (12) not shown, which transmits the order of opening of the contacts to the control mechanism 1, through the differential trip bar 16, the control mechanism 1 driving through a rod (not visible in the figures) the shaft 8 movable contact carrier in an open position of the contacts 6,7 of all unipolar assemblies.
  • the control mechanism 1 is constituted by a first so-called switch mechanism 14 and a second so-called differential mechanism 15, this differential control mechanism being able to receive the trip commands from the differential protection device.
  • the magnetic protection devices 9 and thermal 10 also send their tripping commands, via the transfer bar 11, to the so-called differential control mechanism 15, which transmits this command to the mechanism said switch 14.
  • each unipolar sub-assembly of said phase 2,3,4 further includes a so-called containment piece of the cut-off 17, more commonly known as "capoule”, which is intended to be fixed on the plate P and comprises three walls 18, 19,20 made by molding so as to define a recess 21 substantially parallelepiped closed at its lower part by the plate P.
  • This recess 21 forms a breaking chamber housing a fin block 32, a fixed contact 6 and a movable contact 7 , said breaking chamber being intended to be partially closed at its upper face 23, as will be explained in the following, but leaving a so-called upper opening 24 for allowing the escape of gases.
  • This apparatus also comprises a part called a neutral arc horn 27, able to bring the potential above the opening zone of the neutral contact, this piece being well known to specialists, its function will not be described in more detail. , and is intended to be fixed on the plate P.
  • this arc horn 27 is also intended to support the so-called first trigger bar 12, which is mounted in rotation about a fixed axis of this arc horn 27.
  • the following parts of the apparatus namely the fixed contacts 6, the shaft 8 movable contact carriers, the magnetic triggers 9 and thermal 10, the mechanisms said switch 14 and differential 15, the bar of transfer 11, the trigger bars 12, 16, the neutral arc horn 27, and the containment piece 17, are intended to be referenced or even as the case, fixed on the plate P.
  • the piece 17 confinement of the aforementioned cut mainly consists of a support having a central portion 28 and two end portions 29,30.
  • This central portion 28 has on its underside an opening 31 intended to allow the movable contact holder shaft 8 to pass therethrough.
  • the first end portion 29 has three walls 18, 19, 20 forming a recess 21 of substantially parallelepipedal shape. recess being intended to house an arc extinguishing device 32 formed in this particular embodiment by a block of fins.
  • This part of the confinement part 17 delimiting the breaking chamber comprises on its upper face 23 a so-called upper opening having a first part 24 intended to allow the evacuation of the cutoff gases, and a second part 33 intended to be sealingly sealed by a portion 38 of a part called arc horn 34 as will be explained in the following.
  • a one-piece piece 35 is used to ensure both the function of the current distributor, the sealing of the interrupting chamber, and the conduction of the potential above the block of fins 32.
  • this piece 35 is constituted by a metal blade 36 intended to be mechanically and electrically connected by one 36a of its ends, to a shunt 44 (visible on the figures 1 , 5 and 6 ) for setting the nominal value of the current flowing through the apparatus, and its opposite end 36b, to the movable contact 7 via a braid 40, while the shunt 40 is intended to be connected by a part, to the coil, and secondly, to the metal blade 36.
  • This metal blade 36 comprises a central portion 37 constituting a current distributor between the shunt and the movable contact, a first end portion 38 intended to be brought over the opening 33 of the breaking chamber 22 so as to performing the aforementioned partial seal, as well as a second end portion 39 intended to be mechanically and electrically connected to the braid 40.
  • This first end portion 38 of the one-piece piece 35 is made by folding the corresponding end 36a of the blade 36 so as to form a portion whose shape matches the shape of the opening 33 of the interrupting chamber 22 so as to achieve a partial and sealed closure of said chamber.
  • the second end portion 39 of the one-piece piece 35 is folded so that it can be mechanically and electrically connected to the braid 40 in order to reduce its length.
  • This one-piece piece 35 is intended to be fixed on the containment piece 17 of the cut, on the one hand, at the central portion 28 forming a distributor, on the other hand, at its first end portion 29, by means of snap-fastening means 41, 42 provided on the central portion 28 of the confinement piece 17 and on the first end portion 29 of the confinement piece, these means cooperating with the corresponding parts of the one-piece piece 35.
  • This containment piece is intended to be fixed on the plate P by means of latching means 43 ( fig.3 ) provided on the lower face of the first end portion 29 of the containment piece 17 and cooperating with a corresponding shape provided on the plate P, these means being particularly visible on the figures 4,5 and 6 .

Landscapes

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

Claims (14)

  1. Elektrisches Schaltgerät, das in einem Isolierstoffgehäuse angeordnet ist und mindestens eine Phasenleiter-Poleinheit sowie einen Schaltmechanismus (1) umfasst, welche Phasenleiter-Poleinheit eine Lichtbogenlöschkammer (22) zur Begrenzung der Abschaltzone umfasst, wobei die genannte Löschkammer (22) durch eine, in eine Öffnung der genannten Lichtbogenlöschkammer (22) eingesetzte Abdeckung zumindest teilweise gasdicht verschlossen ist und in der genannten Löschkammer (22) ein feststehender Kontakt (6), ein auf einem beweglichen Kontaktträger (8) angeordneter beweglicher Kontakt (7) sowie eine Lichtbogenlöscheinrichtung (32) angeordnet sind, der genannte Schaltmechanismus (1) manuell oder automatisch in eine Ausschaltstellung der Kontakte (6, 7) verbracht werden kann und ein als Lichtbogenhorn bezeichnetes leitendes Teil (34) dazu dient, das elektrische Potential nach oben aus der Lichtbogenlöscheinrichtung (32) herauszuführen,
    dadurch gekennzeichnet, dass das genannte leitende Teil (34) einen Abschnitt (38) umfasst, der dazu dient, in die genannte, im Umschließungsteil (17) ausgebildete Öffnung (33) der Lichtbogenlöschkammer (22) eingesetzt zu werden und so die genannte Gasdichtigkeit der Lichtbogenlöschkammer (22) zu gewährleisten.
  2. Schaltgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Abschnitt (38) außerdem gewährleistet, das elektrische Potential nach oben aus der genannten Lichtbogenlöscheinrichtung (32) herauszuführen.
  3. Schaltgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass jede Poleinheit (3, 4, 5) einen elektrischen Stromkreis und einen Stromverteiler umfasst, der dazu dient, den Strom an den Eingang des genannten Stromkreises zu leiten, sowie dadurch, dass das genannte leitende Teil (34) einstückig (35) mit dem Stromverteiler ausgeführt ist und einen ersten, sogenannten Mittelabschnitt (37), der die Funktion der Stromverteilung gewährleistet, sowie einen zweiten Abschnitt (38) umfasst, der dazu dient, die genannte Gasdichtigkeit der Lichtbogenlöschkammer (22) sowie die Herausführung des elektrischen Potentials nach oben aus der Lichtbogenlöscheinrichtung (32) heraus zu gewährleisten.
  4. Schaltgerät nach Anspruch 3, dadurch gekennzeichnet, dass der genannte elektrische Stromkreis eine magnetische Schutzeinrichtung (9) umfasst, wobei der genannte Stromverteiler (37) dazu dient, die Aufteilung des Stroms auf einen Parallelwiderstand zur Einstellung des Nennstroms sowie die magnetische Schutzeinrichtung (9) zu gewährleisten.
  5. Schaltgerät nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass das genannte leitende Teil (34) einen gegenüber dem zweiten Abschnitt (38) angeordneten dritten Abschnitt (39) umfasst, welcher einen Verlängerungsabschnitt darstellt, der dazu dient, elektrisch mit dem Leitungsband (40) verbunden zu werden, derart, dass die Länge dieses Leitungsbands zwischen dem genannten leitenden Teil (34) und dem beweglichen Kontakt (7) verringert wird.
  6. Schaltgerät nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das genannte leitende Teil (34) im Bereich der genannten Öffnung (33) mithilfe von teilweise am leitenden Teil (34) und teilweise am Umschließungsteil (17) ausgebildeten Schnappmitteln (42) am Umschließungsteil (17) befestigt ist.
  7. Schaltgerät nach irgendeinem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass das genannte Umschließungsteil (17) außerdem Schnappmittel (41) umfasst, die dazu dienen, den als Stromverteiler ausgebildeten genannten Mittelabschnitt (37) des leitenden Teils am Umschließungsteil (17) zu befestigen.
  8. Schaltgerät nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Umschließungsteil (17) zur Begrenzung der Abschaltzone außerdem an seiner Unterseite, welche der das leitende Teil (34) aufnehmenden Seite gegenüber liegt, eine Öffnung (31) aufweist, die dazu dient, mindestens einen Teil einer die beweglichen Kontakte (7) des Schaltgeräts tragenden Kontaktträgerwelle (8) aufzunehmen.
  9. Schaltgerät nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das genannte Umschließungsteil (17) außerdem Mittel zu seiner Aufnahme und/oder seiner Befestigung (43) auf einer Grundplatte P umfasst, welche Grundplatte P dazu dient, mindestens einen Teil der Einzelteile des Schaltgeräts aufzunehmen.
  10. Schaltgerät nach Anspruch 9, dadurch gekennzeichnet, dass die genannte Grundplatte P Mittel zur Aufnahme einer Baugruppe mit kinematischen Funktionsteilen umfasst, welche Baugruppe den genannten Schaltmechanismus (1), den/die feststehenden Kontakt/e (6) und den/die Träger (8) der beweglichen Kontakte umfasst.
  11. Schaltgerät nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass es eine thermische Schutzeinrichtung (10) für den langzeitverzögerten Überstromschutz und/oder eine magnetische Schutzeinrichtung (9) für den unverzögerten Überstromschutz und/oder eine Differenzstrom-Schutzeinrichtung für den Schutz gegen erdschlussbedingte Summenstromfehler zwischen den Phasen der zu schützenden Installation umfasst, welche Schutzeinrichtungen mit dem Schaltmechanismus (1) derart zusammenwirken, dass sie bei Auftreten eines entsprechenden Fehlers die Abschaltung der Kontakte bewirken, und dadurch, dass die genannte Grundplatte P Mittel zur Aufnahme mindestens einer der genannten Schutzeinrichtungen umfasst.
  12. Schaltgerät nach irgendeinem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass das genannte Umschließungsteil (17) einen Endabschnitt (29) mit drei Wänden (18, 19, 20) umfasst, die einen annähernd quaderförmigen Hohlraum zur Aufnahme einer Lichtbogenlöscheinrichtung (32) begrenzen, derart, dass der Endabschnitt zusammen mit der genannten Grundplatte P eine Lichtbogenlöschkammer (22) bildet, wobei der genannte Endabschnitt an seiner Oberseite eine Öffnung (33), die dazu dient, zumindest teilweise gasdicht durch das genannte leitende Teil (34) verschlossen zu werden, und an seiner Unterseite Befestigungsmittel (43) zu seiner Schnappbefestigung auf der genannten Grundplatte P umfasst.
  13. Schaltgerät nach Anspruch 12, dadurch gekennzeichnet dass das genannte Umschließungsteil (17) einen Mittelabschnitt (28) umfasst, an dessen Unterseite eine Öffnung (31) zur Aufnahme einer die beweglichen Kontakte des Schaltgeräts tragenden Kontaktträgerwelle (8) und an dessen Oberseite Befestigungsmittel (41) zur Befestigung des als Stromverteiler dienenden zweiten Abschnitts (37) des genannten leitenden Teils (34) ausgebildet sind.
  14. Schaltgerät nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es als Eingangsleistungsschalter ausgebildet ist, der dazu dient, zwischen einem Elektrizitätszähler und einer Schaltanlage installiert zu werden, um so eine Verbraucherinstallation an das elektrische Leitungsnetz anzuschließen.
EP20130187808 2012-12-14 2013-10-09 Gerät zur Stromunterbrechung, insbesondere Anschluss-Überlastschalter Active EP2743957B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1262045A FR2999788B1 (fr) 2012-12-14 2012-12-14 Appareil de coupure de courant electrique, en particulier un disjoncteur de branchement.

Publications (2)

Publication Number Publication Date
EP2743957A1 EP2743957A1 (de) 2014-06-18
EP2743957B1 true EP2743957B1 (de) 2015-05-06

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Application Number Title Priority Date Filing Date
EP20130187808 Active EP2743957B1 (de) 2012-12-14 2013-10-09 Gerät zur Stromunterbrechung, insbesondere Anschluss-Überlastschalter

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EP (1) EP2743957B1 (de)
ES (1) ES2542837T3 (de)
FR (1) FR2999788B1 (de)
MA (1) MA35391B1 (de)
PT (1) PT2743957E (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2295553A1 (fr) * 1974-12-17 1976-07-16 Saparel Appareil de coupure de courant electrique
US7633365B2 (en) * 2007-06-28 2009-12-15 General Electric Company Circuit breaker apparatus
FR2950475B1 (fr) * 2009-09-18 2011-09-16 Schneider Electric Ind Sas Entretoise fonctionnelle de separation des ampoules dans un dispositif de coupure multipolaire, et disjoncteur

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EP2743957A1 (de) 2014-06-18
PT2743957E (pt) 2015-07-02
FR2999788A1 (fr) 2014-06-20
FR2999788B1 (fr) 2015-01-02
MA35391B1 (fr) 2014-09-01
ES2542837T3 (es) 2015-08-12

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