EP2779190B1 - Einheitsschaltblock und Schaltvorrichtung, die mindestens einen solchen Block umfasst - Google Patents

Einheitsschaltblock und Schaltvorrichtung, die mindestens einen solchen Block umfasst Download PDF

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Publication number
EP2779190B1
EP2779190B1 EP14160081.7A EP14160081A EP2779190B1 EP 2779190 B1 EP2779190 B1 EP 2779190B1 EP 14160081 A EP14160081 A EP 14160081A EP 2779190 B1 EP2779190 B1 EP 2779190B1
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EP
European Patent Office
Prior art keywords
contact
branch
contacts
stationary
branches
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EP14160081.7A
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English (en)
French (fr)
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EP2779190A1 (de
Inventor
Michel Lauraire
Didier Vigouroux
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2016—Bridging contacts in which the two contact pairs commutate at substantially different moments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2025—Bridging contacts comprising two-parallel bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • 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
    • H01H9/302—Means for extinguishing or preventing arc between current-carrying parts wherein arc-extinguishing gas is evolved from stationary parts
    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • the unit switching unit further comprises a device for actuating the movable contact comprising a movable contact carrier.
  • the invention also relates to an electrical switching device comprising at least one unitary block of current switching.
  • the contactors are generally sized to perform a large number of operations of establishment and interruption of the current in a load. However some of them are not used for this type of application, but rather as a current feeder with a low number of operations of establishment and interruption of the current. This is the case for example of contactors used in combination with a variable speed drive as a short-circuiting element of the drive or also to ensure galvanic isolation.
  • the sizing of the contactor is not optimized for the moment. Indeed, a contactor used for this type of application is generally oversized at its electrical contact pads whose volume is expected to perform a large number of maneuvers. This oversizing can lead to additional costs of the installation.
  • the "current line of passage” of the contactor is also not optimized to ensure a passage of a maximum permanent current in a minimum volume.
  • the term "current passage line” means the assembly formed by the fixed contacts associated with the moving contact.
  • Such switches are, for example, described in the document US 4,421,959 .
  • the invention therefore aims to overcome the disadvantages of the state of the art, so as to provide a switching block with efficient switching means and compact.
  • the first passage branch is mounted in translation on the movable contact holder between two so-called contact pressure positions, a first contact pressure spring applying a first contact pressure force.
  • the second switching branch is mounted in translation on the movable contact holder between two so-called contact pressure positions, a second contact pressure spring applying a second contact pressure force.
  • the first and second branches comprise longitudinal axes that are substantially parallel and offset relative to one another in a direction of movement of the moving contact, displacement in translation in a direction perpendicular to the longitudinal axis.
  • the two fixed contacts have a J-shape at the contact zones with the second branch so that, in the closed position of the contacts, the direction of the electric current flowing in a fixed contact is opposite. in the sense of the electric current flowing in the second branch.
  • the two fixed contacts have a straight shape at the contact areas with the first branch so that the direction of the electric current flowing in a fixed contact is identical to the direction of the electric current flowing in the first branch.
  • the unitary switching unit comprises two first common passage branches driven so as to pass simultaneously from their open position to their closed position and vice versa, said first branches being arranged in parallel with one another. to the other.
  • each first branch is mounted in translation on the movable contact holder between two so-called contact pressure positions, a first contact pressure spring applying a first contact pressure force on each first branch.
  • the first and second branches respectively comprise two ends comprising a contact zone that can collaborate with a contact zone of a fixed contact (320).
  • the contact areas of the second branch comprise a contact pad and the contact areas of the fixed contact intended to be in contact with each other. contact with the contact areas of the second branch comprise a contact pad.
  • the contact areas of the first branch and the contact areas of the fixed contact intended to be in contact with the contact areas of the first branch are respectively covered with a layer of silver or carbon silver.
  • the mobile contact carrier comprises a magnetic U having two branches arranged so that they extend in the direction of movement to envelop at least a portion of the first branches.
  • the switching device comprises a breaking block comprising at least one unit switching unit according to the invention controlled by an actuating block acting on devices for actuating the unitary breaking units for synchronized control of the unit. opening of contacts.
  • the switching unit block 80 comprises a molded plastic housing in which electrical contacts are arranged.
  • the housing is formed of two half-shells 80A assembled to form an assembly of substantially parallelepipedal shape developing along a longitudinal plane XZ.
  • the box then has two main faces arranged parallel to the median longitudinal plane XZ.
  • Said housing further comprises two lateral faces, an upper face and a lower face.
  • an electromagnet acts on the actuating mechanism 34 to control the closing and opening of the electrical contacts.
  • the switching unit block 80 comprises electrical switching means comprising two fixed contacts 320 respectively comprising electrical contact zones 37, 39.
  • the switching means further comprise a movable contact 330 comprising a bridge having an elongated body along an axis longitudinal X and two ends respectively comprising contact areas 36, 40 can collaborate with the contact areas 37, 39 of a fixed contact 320 in a closed position of the contacts 320, 330 of said block.
  • resilient means 41, 42 such as in particular helical springs, ensure between the contact zones 36, 40 and 37, 39 a contact pressure sufficient to ensure the passage of the current in good conditions.
  • Connection pads 45 respectively connect said fixed contacts 320 to an electrical terminal (not shown).
  • the movable contact bridge 330 can move in translation under the action of the actuating device 34. Indeed, the actuating mechanism 34 controls the opening of the electrical contacts by moving in translation the movable contact bridge 330 according to a direction perpendicular to the longitudinal axis X. The movable contact bridge 330 moves between an open position and a closed position of the electrical contacts.
  • the actuating device 34 of the movable contact 330 comprising a movable contact holder 38.
  • Two opening volumes 35 corresponding to the space in which the contact zones 37, 39 of a fixed contact 320 and the contact zones 36, 40 associated with the movable contact 330 are thus defined are defined.
  • each opening volume 35 may be associated with an arc extinction chamber 24.
  • Each arc extinction chamber 24 opening on the opening volume 35 is delimited by two parallel lateral flanges and placed on either side of a median longitudinal plane XZ.
  • the two side flanges are arranged to frame a portion of the movable bridge 330 over its entire displacement between the open position and the closed position. In other words, the two lateral flanges are spaced apart from one another to allow the movement of the movable bridge of contact 330.
  • the parallel side flanges of an arc extinguishing chamber 24 may have inner surfaces covered with a gas generating material.
  • the movable contact 330 comprises at least one first branch 331 said passage of the current and a second branch 332 said switching of the electric current.
  • the first and second branches 331, 332 are intended to connect respectively the two fixed contacts 320 in the closed position of the contacts 330, 320.
  • Said at least one first passage branch 331 comprises two ends respectively comprising a contact zone 40 that can collaborate with a contact zone 39 of a fixed contact 320.
  • the second switching branch 332 comprises two ends respectively comprising a contact zone 36 which can collaborate with a contact zone 37 of a fixed contact 320.
  • the movable contact 330 comprises two first passage branches 331 driven so as to pass simultaneously from their open position to their closed position and vice versa. As shown on Figures 3B and 5A said first legs 331 are arranged parallel to one another. This paralleling two first branches 331 (instead of a single first branch) allows to pass a higher current in a given volume.
  • the first and second branches 331, 332 are movable relative to each other.
  • the first and second branches 331, 332 are integral with the contact holder 38.
  • the fact of using in a given volume two first branches 331 of passage and a second branch 332 of parallel switching provides a gain of 40% on the permissible current. This gain is estimated in comparison with a known contactor using a movable bridge having a single movable branch.
  • the object of the invention is to prevent the contact zones 40 from the first branches 331 are in contact with a switching arc at the time of closing and / or opening of the electrical contacts 320, 330.
  • first and second branches 331, 332 are movable relative to each other allows the first branches 331 passage are removed from the two fixed contacts 320 while the second branch 332 switching is still in effect. contact with said fixed contacts 320 at the time of opening of the contacts 330, 320 of said block. Furthermore, the fact that the two branches 331, 332 are movable relative to each other allows the second branch 332 to be in contact with the two fixed contacts 320 while the first branch 331 are still distant from the fixed contacts 320 at the time of closure of the contacts 330, 320 of said block.
  • first movable branches 331 for passage and the second branches 332 for switching thanks to the action of the movable contact holder 38, move in an offset manner in the closing sequence of the contactor so as to close first the second branch 332 switching.
  • Said first and second branches 331, 332 move in an offset manner in the opening sequence of the contactor so as to open lastly the second switching branch 332.
  • the time shift in the movement of the first and second legs 331, 332 is achieved by the relative positioning of said movable legs in the movable contact holder 38.
  • a first operating clearance J1 separates the first passage branches 331 of the movable contact holder 38 and a second operating set J2 separates the second switching branch 332 from the movable contact holder 38.
  • the relative dimensioning of the first and second sets J1, J2 makes it possible to obtain the time shift in the movement during the opening and closing of the electrical contacts 320, 330.
  • the first operating clearance J1 is smaller than the second operating clearance J2 so that the first passageways 331 s open first and close in latest.
  • the first branch 331 is mounted in translation on the movable contact holder 38 between two so-called contact pressure positions.
  • a first contact pressure spring 41 applies a first contact pressure force F1.
  • each first branch 331 is mounted in translation on the movable contact holder 38 between two so-called contact pressure positions.
  • a first contact pressure spring 41 applies a first contact pressure force F1 to each first branch 331.
  • the second branch 332 is mounted in translation on the movable contact holder 38 between two so-called contact pressure positions, a second contact pressure spring 42 applying a second contact pressure force F2.
  • the first branch 331 is intended for the passage of the nominal current (so-called normal operation) and the second branch 332 is intended for the establishment and interruption of electric currents.
  • This architecture then makes it possible to optimize the dimensioning of each of the branches 331, 332 for the function to which it is dedicated.
  • the fixed contacts 320 intended to collaborate with the second branch 332 for switching the movable contact 330 have a J-shaped at the contact areas 37 with the second branch 332.
  • the direction of the electric current flowing in a fixed contact 320 is opposite to the direction of the electric current flowing in the second branch 332. This is why this form of J is intended to promote the switching of currents.
  • the contact areas 37 of the fixed contact 320 intended to be in contact with the contact zones 36 of the second branch 332 comprise a contact pad.
  • the contact areas 36 of the second branch 332 also include a contact pad.
  • the fixed contacts 320 intended to collaborate with the first branches 331 of the movable contact have a straight shape at the contact zones 39 with the first branch 331.
  • the direction of the electric current circulating in a fixed contact 320 is identical to the direction of the electric current flowing in the first branch 331. Therefore, this straight form is intended to greatly reduce the risk of electrodynamic repulsion.
  • Said zones 39, 40 consist of copper coated with a thin layer of silver Ag or silver-carbon alloy AgC.
  • thin layer is meant a layer of material having a thickness of between, for example, 10 ⁇ m and a few tens of microns. This in particular makes it possible to strongly reduce the silver volumes of the contact pads present in the contactors. In this way, the consumption of a raw material whose reserves are exhausted and the cost of the apparatus is reduced simultaneously.
  • the first and the second branches 331, 332 comprise longitudinal axes that are substantially parallel and offset relative to one another in a direction of displacement Z of the movable contact 330.
  • the displacement in translation of the mobile contact holder 38 supporting the first and second the second limbs 331, 332 are made in a direction perpendicular to the longitudinal axis X.
  • the movable contact holder 38 comprises a magnetic U 55 having two branches arranged so that they extend in the direction of displacement Z to envelop at least a portion of the first branches 331.
  • the invention also relates to switching device 1 such as in particular a contactor.
  • the electrical switching device 1 according to the invention as represented on the figure 9 comprises a breaking block 100 associated with an actuating block 200.
  • the breaking block 100 of the switching device 1 according to the invention comprises one or more electric poles.
  • the contactor has three electrical poles, it is called tripolar contactor.
  • a unitary block of cutoff 80 is then associated with each electrical pole.
  • the three unitary breaking units 80 are then synchronously controlled by the actuating block 200 acting on actuating devices 34 of the unitary breaking units 80.
  • the switching device 1 comprises connection terminal blocks 500 intended to be connected. at connection terminals 45 of the unitary breaking units 80.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (8)

  1. Einheitlicher Schaltblock (80) für eine elektrische Schaltvorrichtung, umfassend:
    - elektrische Schaltmittel, umfassend:
    - zwei feststehende Kontakte (320), die jeweils an einen elektrischen Anschlussbereich (45) des einheitlichen Blocks angeschlossen sind;
    - einen beweglichen Kontakt (330), der eine Brücke mit einem gemäß einer Längsachse (X) verlängerten Körper und mit zwei Enden, die jeweils mit einem feststehenden Kontakt (320) in einer Schließstellung der Kontakte (320, 330) des Blocks zusammenarbeiten können, aufweist;
    - eine Betätigungsvorrichtung (34) für den beweglichen Kontakt (330), die einen beweglichen Kontaktträger (38) aufweist;
    wobei der bewegliche Kontakt (330) einen ersten Arm (331) und einen zweiten Arm (332) aufweist, die vorgesehen sind, jeweils die zwei feststehenden Kontakte (320) in der Schließstellung der Kontakte (330, 320) zu verbinden, wobei der erste und zweite Arm (331, 332) zueinander derart beweglich sind, dass:
    - der erste Arm (331) für den Durchgang des Stroms entfernt von den zwei feststehenden Kontakten (320) ist, während der zweite Arm (332) noch in Kontakt mit den feststehenden Kontakten (320) zum Zeitpunkt des Öffnens der Kontakte (330, 320) des Blocks ist;
    - der zweite Arm (332) für das Schalten des Stroms in Kontakt mit den zwei feststehenden Kontakten (320) ist, während der erste Arm (331) von den feststehenden Kontakten (320) zum Zeitpunkt des Schließens der Kontakte (330, 320) des Blocks entfernt ist;
    wobei die zwei feststehenden Kontakte (320) an den Kontaktzonen (37) mit dem zweiten Arm (332) eine J-Form aufweisen, derart, dass in der Schließstellung der Kontakte (320, 330) die Richtung des in einem feststehenden Kontakt (320) fließenden elektrischen Stroms entgegengesetzt zur Richtung des elektrischen Stroms ist, der in dem zweiten Arm (332) fließt, und dass die zwei feststehenden Kontakte (320) an den Kontaktzonen (39) mit dem ersten Arm (331) eine gerade Form aufweisen, derart, dass die Richtung des in einem feststehenden Kontakt (320) fließenden elektrischen Stroms identisch mit der Richtung des in dem ersten Arm (331) fließenden elektrischen Stroms ist, dadurch gekennzeichnet, dass der bewegliche Kontakt zwei erste Arme (331) für den Durchgang des Stroms aufweist, die so angesteuert werden, dass sie gleichzeitig von ihrer Offenstellung in ihre Schließstellung übergehen und umgekehrt, wobei die ersten Arme (331) parallel zueinander angeordnet sind, und dass jeder erste Arm (331) in geradliniger Bewegung an dem beweglichen Kontaktträger (38) zwischen zwei Positionen, genannt Kontaktdruckpositionen, montiert ist, wobei eine erste jeweilige Kontaktdruckfeder (41) eine erste Kontaktdruckkraft (F1) auf jeden ersten Arm (331) aufbringt.
  2. Einheitlicher Schaltblock nach Anspruch 1, dadurch gekennzeichnet, dass:
    - der zweite Schaltarm (332) an dem beweglichen Kontaktträger (38) zwischen zwei Positionen, genannt Kontaktdruckpositionen, in Geradeausbewegung montiert ist, wobei eine zweite Kontaktdruckfeder (42) eine zweite Kontaktdruckkraft (F2) aufbringt.
  3. Einheitlicher Schaltblock nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass jeder erste Arm und der zweite Arm (331, 332) im Wesentlichen parallele und zueinander gemäß einer Verschiebungsrichtung (Z) des beweglichen Kontakts (330) versetzte Längsachsen aufweisen, wobei die Verschiebung translatorisch gemäß einer Richtung senkrecht zur Längsachse (X) gegeben ist.
  4. Einheitlicher Schaltblock nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ersten und der zweite Arm (330, 332) jeweils zwei Enden umfassen, die eine Kontaktzone (36, 40) aufweisen, um mit einer Kontaktzone (37, 39) eines feststehenden Kontakts (320) zusammenarbeiten zu können.
  5. Einheitlicher Schaltblock nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass:
    - die Kontaktzonen (36) des zweiten Arms (332) eine Kontaktfläche aufweisend, und
    - die Kontaktzonen (37) des feststehenden Kontakts (320), die vorgesehen sind, in Kontakt mit den Kontaktzonen (36) des zweiten Arms (332) zu kommen, eine Kontaktfläche aufweisen.
  6. Einheitlicher Schaltblock nach den Ansprüchen 4 oder 5, dadurch gekennzeichnet, dass die Kontaktzonen (40) jedes ersten Armes (331) und die Kontaktzonen (39) des feststehenden Kontakts (320), die vorgesehen sind, in Kontakt mit den Kontaktzonen (40) jedes ersten Armes (331) zu kommen, jeweils mit einer Silberschicht (Ag) oder Silbercarbid (AgC) bedeckt sind.
  7. Einheitlicher Schaltblock nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der mobile Kontaktträger (38) ein magnetisches U (55) aufweist, das zwei Schenkel hat, die derart angeordnet sind, dass sie sich gemäß einer Verschiebungsrichtung (Z) erstrecken, um mindestens einen Teil der ersten Arme (331) zu umhüllen.
  8. Schaltvorrichtung (1),
    dadurch gekennzeichnet,
    dass sie einen Abschaltblock (100) aufweist, der mindestens einen einheitlichen Schaltblock (80) nach einem der vorherigen Ansprüche umfasst,
    gesteuert durch einen Betätigungsblock (200), der auf die Betätigungsvorrichtungen (34) der einheitlichen Schaltblöcke (80) für eine synchronisierte Steuerung der Öffnung der Kontakte (320, 330) wirkt.
EP14160081.7A 2013-03-15 2014-03-14 Einheitsschaltblock und Schaltvorrichtung, die mindestens einen solchen Block umfasst Active EP2779190B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1352343A FR3003392B1 (fr) 2013-03-15 2013-03-15 Bloc unitaire de commutation et dispositif de commutation comportant au moins un tel bloc

Publications (2)

Publication Number Publication Date
EP2779190A1 EP2779190A1 (de) 2014-09-17
EP2779190B1 true EP2779190B1 (de) 2017-10-18

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EP14160081.7A Active EP2779190B1 (de) 2013-03-15 2014-03-14 Einheitsschaltblock und Schaltvorrichtung, die mindestens einen solchen Block umfasst

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US (1) US9218918B2 (de)
EP (1) EP2779190B1 (de)
CN (1) CN104051166B (de)
ES (1) ES2654625T3 (de)
FR (1) FR3003392B1 (de)

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FR2999791B1 (fr) * 2012-12-18 2015-01-02 Schneider Electric Ind Sas Dispositif modulaire de commutation electrique comportant au moins un bloc de coupure unipolaire et ensemble de commutation comportant de tels dispositifs
US10020555B2 (en) * 2015-08-14 2018-07-10 Avago Technologies General Ip (Singapore) Pte. Ltd. Reconfigurable 1:N wilkinson combiner and switch
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CN105336526A (zh) * 2015-12-10 2016-02-17 二一三电器(上海)有限公司 双断点触头的灭弧装置
KR102136944B1 (ko) * 2017-01-16 2020-07-23 성 젠 우 릴레이에 물체를 연결 또는 연결해제할 때 전기 아크를 방지하기 위한 방법
EP3624157A1 (de) 2018-09-17 2020-03-18 Microelettrica Scientifica S.p.A. Verbesserte umschaltvorrichtung oder schütz mit hohen lichtbogenlöschfähigkeiten
FR3087576B1 (fr) * 2018-10-22 2020-11-13 Schneider Electric Ind Sas Appareil de coupure d'un courant electrique
CN210897140U (zh) * 2019-12-24 2020-06-30 施耐德电器工业公司 分断器和接触器
CN210956485U (zh) * 2019-12-24 2020-07-07 施耐德电器工业公司 分断器、分断器组件和接触器
FR3115924B1 (fr) * 2020-11-03 2023-05-12 Schneider Electric Ind Sas Porte-contact mobile pour coupe-circuit et coupe-circuit comprenant un tel porte-contact mobile

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EP2779190A1 (de) 2014-09-17
US20140262708A1 (en) 2014-09-18
FR3003392B1 (fr) 2016-07-22
FR3003392A1 (fr) 2014-09-19
ES2654625T3 (es) 2018-02-14
CN104051166A (zh) 2014-09-17
US9218918B2 (en) 2015-12-22
CN104051166B (zh) 2019-09-17

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