EP3651171B1 - Gerät zur unterbrechung eines elektrischen stroms - Google Patents

Gerät zur unterbrechung eines elektrischen stroms Download PDF

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Publication number
EP3651171B1
EP3651171B1 EP19207678.4A EP19207678A EP3651171B1 EP 3651171 B1 EP3651171 B1 EP 3651171B1 EP 19207678 A EP19207678 A EP 19207678A EP 3651171 B1 EP3651171 B1 EP 3651171B1
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EP
European Patent Office
Prior art keywords
cage
movable
interrupting
movable portion
receiver
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
EP19207678.4A
Other languages
English (en)
French (fr)
Other versions
EP3651171A1 (de
Inventor
Patrick Comtois
Thomas MACHIZAUD
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP3651171A1 publication Critical patent/EP3651171A1/de
Application granted granted Critical
Publication of EP3651171B1 publication Critical patent/EP3651171B1/de
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • 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
    • H01H1/34—Contacts characterised by the manner in which co-operating contacts engage by abutting with provision for adjusting position of contact relative to its co-operating contact
    • 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
    • H01H1/2008—Facilitate mounting or replacing contact bridge and pressure spring on carrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/002—Details of electromagnetic relays particular to three-phase electromagnetic relays

Definitions

  • the present invention relates to an apparatus for cutting an electric current.
  • WO-2014/096582-A1 describes a multipolar switching device comprising several separable contact breaking elements, each associated with a phase of a polyphase current and coupled to an actuator which simultaneously moves the separable contacts between an open position and a closed position. In the closed position, movable contacts of the breaking elements are in contact with corresponding fixed contacts, which allows the passage of electric current.
  • the breaking device comprises three breaking elements. In this case, each breaking element is associated with a phase of the current.
  • WO-2014/096582-A1 describes in particular means for adjusting the position of each cut-off element around the closed position, so that the mechanical synchronization of the fixed and movable pads of each cut-off element is the best possible between all the cut-off elements of the device.
  • the closed position there may be a misalignment between the movable contacts with respect to their ideal theoretical position, generally because of dimensional tolerances due to variabilities inherent in the manufacturing process of the device.
  • This misalignment results in unequal crushing of the contacts from one breaking element to another in the closed position.
  • the movable contacts of a first breaking element may be in a more advanced position than the movable contacts of a second breaking element of the same device.
  • Such a misalignment can cause heterogeneous wear of the electrical contacts within the device.
  • the position adjustment is difficult to adjust precisely, especially since it can only be performed when the movable contacts are in the open position.
  • each cut-off element comprising on the one hand a fixed part being linked to fixed electrical contacts and on the other hand a movable part which carries movable electrical contacts, the movable part being movable in translation along an axis of movement between an open position and a closed position of the electrical contacts, as well as 'an actuator comprising a movable part movable in translation along the axis of movement to move the movable parts between the open and closed positions, each movable part comprising for this purpose a connecting member fixed to the movable part.
  • each movable part of the breaking device comprises a body which comprises a first housing
  • each breaking element comprises on the one hand a cage mounted in the first housing, the cage being linked to a support carrying the movable contact.
  • the cage being movable in translation along the axis of movement with respect to the movable part and on the other hand a movable stop which limits the movement of the cage with respect to the movable part, the movable stop being movable in translation along the axis of movement by means of an adjustment screw.
  • the adjustable movable stopper makes it possible to control the movement of the cage independently of the body of the movable part, which makes it possible to finely adjust the position of the movable contact in the closed position to compensate for a possible misalignment with the other movable contacts when the latter are in the closed position.
  • the adjustment thus makes it possible to lengthen or reduce the travel in translation of each movable contact in a controlled manner.
  • This adjustment can be carried out for each of the cut-off elements, independently of the other cut-off elements, even when these cut-off elements are all connected to the same moving part of the actuator.
  • Switching device 2 shown in figure 1 comprises several cut-off elements 4 juxtaposed in a direction perpendicular to the plane of the figure 1 , only one of which is visible in this figure, with the reference 4.
  • the switching device 2 comprises also an actuator 6 common to the various cut-off elements 4.
  • the cut-off elements 4 are sometimes called “cut-off unit” or “cut-off bulb”.
  • the switching device 2 makes it possible to interrupt, or, alternatively, to authorize the flow of electric current, for example in response to a control voltage.
  • a switching device is for example intended to be installed in an electrical installation, in particular in an electrical cabinet.
  • the switching device 2 is for example a multipolar device with separable contacts, suitable for interrupting a polyphase electric current.
  • each cut-off element 4 is associated with a phase of the electric current.
  • the device is suitable for interrupting a three-phase electric current and comprises three cut-off elements 4.
  • the three cut-off elements 4 are identical here, but only one of them is described in detail in what follows.
  • Each cut-off element 4 comprises fixed electrical contacts 8 connected to connection pads 10 upstream and downstream of the device 2, and also comprises a movable electrical contact 12 reversibly displaceable relative to the fixed contacts 14, here along a displacement axis. X, between an open position and a closed position.
  • the fixed contacts 8 each comprise a contact pad 14 and the movable contact 12 comprises contact pads 16.
  • the flow of electric current within a switching element 4 is interrupted when the fixed contacts 8 integral with the connection pad 10 are separated from the movable contacts 12. When these contacts are separated, the fixed contact pads 14 carried by the fixed contacts 8 do not touch the movable contact pads 16 carried by the movable contacts 12.
  • This first configuration corresponds to the open position of the movable contacts 12 in which the current does not flow.
  • the closed position of the movable contacts 12 corresponds to the case where the movable contact pads 16 bear against the fixed contact pads 14, thus allowing current to flow in this second configuration.
  • the cut-off elements 4 are each equipped with a movable part 20.
  • a connecting member 30 ensures the coupling of the movable part 20 of each cut-off element 4 to the actuator 6.
  • the simultaneous movement of the movable contacts 12 between the position opening and the closed position is induced by a moving part 32 of the actuator 6.
  • the actuator 6 here comprises an electromagnet, not referenced in the figures, as well as the movable part 32.
  • the movable part 32 comprises a magnetic material.
  • the electromagnet When the electromagnet is supplied following the reception of a control voltage, it exerts a magnetic force which drives the movable part 32 in translation along the X axis towards the closed position. Conversely, when the electromagnet ceases to be supplied, the moving part 32 is returned to the open position.
  • the actuator 6 is installed on a front part of the device 2.
  • front and rear parts of the device 2 are defined in the following with reference to the movement of the movable contacts 12. along the X axis.
  • the arrow F1 indicates the direction of movement of the movable part 32 and of the movable contacts 12 from the rear towards the front of the device 2.
  • the movable part 32 makes it possible to simultaneously move each movable part 20 of each cut-off element 4 along the axis of movement X.
  • the movement of the part 32 along an axis of movement X drives, via the connecting member 30 of each element switch 4, the displacement of each movable part 20 along the same axis of displacement X, thus generating the transition from the open position to the closed position (or vice versa).
  • This displacement of the movable part 20 of the cut-off element 4 therefore has the effect of bringing the contact pads 16 carried by the movable contact 12 into contact with the contact pads 14 carried by each of the fixed contacts 8.
  • the movable part 20 is shown in detail in figures 2 and 3 .
  • the movable part 20 comprises a body 22, integral with the connecting member 30, and a cage 24 to which is linked a movable support 26, which carries the movable contacts 12.
  • This movable support 26 is also called “movable bridge”. In the remainder of the text, the expression “movable bridge” is used.
  • the body 22 comprises a hollow part forming a first housing 34 delimited by side walls 36 and 38, a front wall 41 and a rear wall 40.
  • the cage 24 is housed in this first housing 34.
  • the cage 24 is preferably rectangular and comprises a front face 48, a rear face 46 and two lateral faces 50 and 52.
  • the rear face 46 is perpendicular to the axis of displacement X.
  • the faces 46, 48, 50 and 52 of the cage 24 define a second housing 44 intended to accommodate the movable bridge 26 and a member 28 for elastic return.
  • This resilient return member 28 is for example a helical compression spring.
  • the elastic return member 28 allows movement along the axis of movement X of the movable bridge 26 relative to the cage 24.
  • the elastic return member 28 brings back the movable bridge 26 in the direction of the fixed contacts 8 and makes it possible to absorb the shock undergone by the movable contact 12 when the movable contact pads 16 come into contact with the fixed contact pads 14 , when closing the cut-off element 4.
  • the movable bridge 26 is movable in translation with respect to the cage 24 along the axis of movement X.
  • the cage 24 is movable in translation with respect to the body 22 the same axis of movement X.
  • the translation of the cage 24 by relative to the body 22 is decoupled from the translation of the movable bridge 26 relative to the cage 24. In other words, the two translations are independent of one another.
  • the movable bridge 26 can be kept integral with the cage 24, the elastic return member 28 then being able to be omitted.
  • the cut-off element 4 further comprises a movable stop 60, here disposed between the rear face 46 of the cage 24 and the rear wall 40 of the body 22.
  • the movable stop 60 is disposed inside the first housing. 34, behind the rear face 46.
  • the movable stop 60 is movable in translation along the axis of movement X and limits a retreat of the cage 24 when the movable part 20 arrives in the open position.
  • the movable stop 60 is secured to an adjustment screw 62.
  • the adjustment screw 62 here comprises a head 64 and a rod 66.
  • Hole 42 and orifice 54 are each coaxial with the axis of movement X.
  • the rod 66 thus forms a preferentially helical connection with the hole 42.
  • This helical connection here allows the movement of the movable stop 60 along the axis of movement X.
  • the head 64 of the adjusting screw 62 is located on the outside of the body 22, opposite the link member 30 along the X axis. In other words, the head 64 protrudes from the body. rear wall 40 of body 22, so as to be accessible from the outside in order to be able to be actuated by a tool 80, such as a screwdriver.
  • the movable stop 60 is a flange attached to the rod 66 of the adjustment screw 62, so as to be integral in rotation with the rod 66 when the latter rotates around the X axis.
  • This collar may take the form of a disc centered on the X displacement axis.
  • the flange of the movable stopper 60 can be brought closer to the rear face 46 of the cage 24 in order to limit the movement of the cage 24 relative to the body 22.
  • the movable stop 60 remains stationary as long as the adjustment screw 62 is not turned by the tool 80, for example because a thread of the rod 66 is engaged with the tapping hole 42.
  • the movable stopper 60 When the adjustment screw 62 is in a loosened state, the movable stopper 60 is in a retracted position at the rear of the apparatus 2. The cage 24 is not constrained to remain in the advanced position by the movable stopper 60 and the cage 24 is then in a “floating” position.
  • the cage 24 is brought back from the front to the rear until it comes into abutment against the movable stop 60 and the cage 24 is then in the retracted position.
  • the exact position of the cage 24 can then be adjusted using the adjusting screw 62, for example by means of the tool 80, with a view to compensating for any misalignment with the movable contacts 12 of the other cut-off elements 4. .
  • the spacings e1 on the figure 4 and e2 on the figure 5 correspond to the distance between the inside face of the front wall 41 of the body 22 and the front face 48 of the cage 24, here when the cage 24 is in abutment against the movable stop 60.
  • the spacings e1 and e2 are here each between 0.1mm and 1mm.
  • the spacing e1 is greater than the spacing e2 of the figure 5 .
  • the cage 24 is translated from the rear part of the switching device 2 towards the front.
  • the translation of the cage 24 by means of the stop 60 and the adjustment screw 62 allows the movable bridge 26 to be brought closer to the actuator 6, which is equivalent to precisely adjusting the position of the movable contacts 12 integral with the movable bridge. 26 in relation to the fixed contacts 8.
  • the adjustment of the cut-off elements 4 preferably takes place in the closed position.
  • each movable contact 12 can be lengthened or reduced in a controlled manner.
  • the translation travel can be adjusted for each of the cut-off elements 4, independently of the other cut-off elements 4.
  • the invention makes it possible to carry out the adjustment even when the cut-off elements 4 are all connected to the same moving part 32 of the actuator 6, unlike the adjustment described in WO-2014/096582-A1 , in which the adjustment function was provided by a screw which simultaneously served as a connecting member. The adjustment could not then be done in the closed position and had to be done in the open position.
  • the adjustment function and the function of connection with the actuator are performed independently of one another.
  • the link function between the actuator 6 and the movable contact 12 is separate from the stroke adjustment function, which makes it possible to carry out the adjustment in the closed position even when the actuator 6 is mounted on the front face of the device 2.
  • each cut-off element 4 comprises a washer 68 threaded onto the rod 66 and interposed between the head 64 and the outer face of the rear wall 40 of the body 22.
  • This washer 68 makes it possible to occupy the space created between the head. 64 and the outer face of the rear wall 40 when varying the spacing between the inner face of the rear wall 40 of the body 22 and the rear face 46 of the cage 24.
  • the washer 68 is made of metal or made of elastomeric material.
  • the cage 24 is made of a plastic material, preferably in the form of a strip.
  • This strip of plastic material has a folded shape so as to form a rectangular frame.
  • the rear wall 46 is perpendicular to the axis of movement X.
  • the rear wall 46 is adjacent to the two side walls 50 and 52. These side walls 50 and 52 are mutually parallel and adjacent to the front wall 48. of the cage 24.
  • the front wall 48 and the rear wall 46 are mutually parallel.
  • the rear wall 46 is split when the folded strip forming the frame consisting of the wall rear 46, the side wall 50, the front wall 48 and the side wall 52 cover the rear wall 46.
  • the cage 24 can have another shape, for example square or cylindrical.
  • the shape of the housing 34 must in all circumstances be adapted to receive the cage 24.
  • At least one of the side faces 50 or 52 of the cage 24 comprises a first relief 70 which collaborates by complementarity of shapes with a second relief 72 present on one of the walls. side 36 or 38 of the body 22.
  • the connections thus formed by the first relief 70 and the second relief 72 maintain the cage 24 in the housing 34 and guide it in translation along the axis of displacement X.
  • first relief 70 collaborates with a third relief 74 present on the movable bridge 26 in order to maintain the bridge 26 inside the second housing 44 delimited by the cage 24, in particular during assembly operations of the 'cut-off element 4.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Transmission Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Claims (9)

  1. Vorrichtung (2) zum Unterbrechen eines elektrischen Stroms, enthaltend:
    - mindestens ein Trennelement (4), wobei jedes Trennelement aufweist:
    • ein feststehendes Teil, das feststehende elektrische Kontakte (8) trägt, und
    • ein bewegliches Teil (20), das einen beweglichen elektrischen Kontakt (12) trägt, wobei das bewegliche Teil entlang einer Bewegungsachse (X) zwischen einer offenen Position und einer geschlossenen Position der elektrischen Kontakte verschiebbar ist;
    - einen Aktuator (6), der ein bewegliches Element (32) aufweist, das entlang der Bewegungsachse (X) translatorisch verschiebbar ist, um das bewegliche Teil (20) zwischen seiner offenen und seiner geschlossenen Position zu verschieben, wobei jedes bewegliche Element (32) zu diesem Zweck ein an dem beweglichen Teil (20) befestigtes Verbindungselement (30) aufweist, wobei jedes bewegliche Teil (20) einen Körper (22) aufweist, der einen ersten Aufnahmeraum (34) einschließt;
    wobei die Unterbrechungsvorrichtung (2) dadurch gekennzeichnet ist, dass jedes Trennelement (4) außerdem aufweist:
    - einen Käfig (24), der in dem ersten Aufnahmeraum (34) montiert ist, wobei der Käfig (24) in Bezug auf den Körper (22) des beweglichen Teils (20) entlang der Bewegungsachse (X) verschiebbar ist, wobei der Käfig (24) mit einem Träger (26) verbunden ist, der den beweglichen Kontakt (12) trägt, und
    - einen beweglichen Anschlag (60), der die Bewegung des Käfigs (24) in Bezug auf den Körper (22) des beweglichen Teils (20) begrenzt, wobei der bewegliche Anschlag (60) in Bezug auf den Körper (22) des beweglichen Teils (20) und gemäß der Bewegungsachse (X) mittels einer Einstellschraube (62) translatorisch bewegbar ist.
  2. Unterbrechungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Kopf (64) der Einstellschraube (62) in dem beweglichen Teils (20) entlang der Bewegungsachse (X) entgegengesetzt zu dem Verbindungselement (30) angeordnet ist.
  3. Unterbrechungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der bewegliche Anschlag (60) ein mit einem Stab (66) der Einstellschraube (62) integrierter Kragen ist, wobei der Kragen drehfest mit dem Stab (66) verbunden ist.
  4. Unterbrechungsvorrichtung nach einem beliebigen der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Käfig (24) eine zur Bewegungsachse (X) senkrechte Rückseite (46) aufweist, wobei der bewegliche Anschlag (60) im Inneren des ersten Aufnahmeraums (34) hinter der Rückseite (46) angeordnet ist, um einen Rückstoß des Käfigs (24) zu verhindern, wenn das bewegliche Teil (20) in die offene Position gelangt.
  5. Unterbrechungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jedes Trennelement (4) eine Scheibe (68) aufweist, die zwischen dem Kopf (64) der Einstellschraube (62) und einer Rückwand (40) des Körpers (22) des beweglichen Teils (20) angeordnet ist.
  6. Unterbrechungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Käfig (24) einen zweiten Aufnahmeraum (44) begrenzt, dass der Träger (26) in dem zweiten Aufnahmeraum (44) gelagert ist, dass der Träger (26) in Bezug auf den Käfig (24) in dem zweiten Aufnahmeraum (44) entlang der Bewegungsachse (X) translatorisch verschiebbar ist und dass der Käfig (24) ein in dem zweiten Aufnahmeraum (44) angeordnetes elastisches Rückstellelement (28) aufweist, das den Träger (26) in Richtung der feststehenden Kontakte (8) zurückstellt.
  7. Unterbrechungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eine Seitenwand des Käfigs (24) ein erstes Relief (70) aufweist, das vorgesehen ist, durch Formschluss mit einem zweiten Relief (72) zusammenzuwirken, das auf einer Innenfläche des ersten Aufnahmeraums (34) vorhanden ist, um den Käfig (24) in Bezug auf den Körper (22) des beweglichen Teils (20) zu halten und translatorisch zu führen.
  8. Unterbrechungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Käfig (24) aus Kunststoff hergestellt ist.
  9. Unterbrechungsvorrichtung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Vorrichtung (2) eine mehrpolige Unterbrechungsvorrichtung ist, die einen mehrphasigen elektrischen Strom unterbrechen kann, wobei die Unterbrechungsvorrichtung eine Mehrzahl von Trennelementen (4) umfasst und jedes Trennelement (4) einer Phase des elektrischen Stroms zugeordnet ist.
EP19207678.4A 2018-11-08 2019-11-07 Gerät zur unterbrechung eines elektrischen stroms Active EP3651171B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1860291A FR3088477B1 (fr) 2018-11-08 2018-11-08 Appareil de coupure d'un courant electrique

Publications (2)

Publication Number Publication Date
EP3651171A1 EP3651171A1 (de) 2020-05-13
EP3651171B1 true EP3651171B1 (de) 2021-10-27

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ID=65685694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19207678.4A Active EP3651171B1 (de) 2018-11-08 2019-11-07 Gerät zur unterbrechung eines elektrischen stroms

Country Status (3)

Country Link
EP (1) EP3651171B1 (de)
CN (1) CN111161980A (de)
FR (1) FR3088477B1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1386460A (fr) * 1963-12-12 1965-01-22 Cem Comp Electro Mec Dispositif pour le réglage de contacts des contacteurs électriques
FR2559308B1 (fr) * 1984-02-03 1986-10-17 Telemecanique Electrique Contact equipe d'un compensateur magnetique avec seuil de liberation reglable et contacteur-disjoncteur utilisant un tel contact
FR2999778B1 (fr) 2012-12-18 2015-01-02 Schneider Electric Ind Sas Procede de reglage de la course d'ecrasement des contacts electriques d'un bloc de coupure, bloc pour la mise en oeuvre dudit procede et dispositif de commutation comportant un tel bloc.
JP6106528B2 (ja) * 2013-06-05 2017-04-05 株式会社日立産機システム コンタクタ用操作装置
US9373471B2 (en) * 2013-12-02 2016-06-21 Tesla Motors, Inc. Electromagnetic switch with damping interface
JP6334677B2 (ja) * 2014-02-25 2018-05-30 ウチヤ・サーモスタット株式会社 温度スイッチ

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Publication number Publication date
FR3088477B1 (fr) 2020-12-04
EP3651171A1 (de) 2020-05-13
CN111161980A (zh) 2020-05-15
FR3088477A1 (fr) 2020-05-15

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