EP2894647B1 - Unipolarer Abschaltblock, und mit einem solchen Block ausgestattete Abschaltvorrichtung - Google Patents

Unipolarer Abschaltblock, und mit einem solchen Block ausgestattete Abschaltvorrichtung Download PDF

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Publication number
EP2894647B1
EP2894647B1 EP15150726.6A EP15150726A EP2894647B1 EP 2894647 B1 EP2894647 B1 EP 2894647B1 EP 15150726 A EP15150726 A EP 15150726A EP 2894647 B1 EP2894647 B1 EP 2894647B1
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EP
European Patent Office
Prior art keywords
rotation
rotating gate
threshold value
switching unit
angle threshold
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
EP15150726.6A
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English (en)
French (fr)
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EP2894647A1 (de
Inventor
Philippe Legendre
Jean-Paul Gonnet
Denis Giraud
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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Filing date
Publication date
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Publication of EP2894647A1 publication Critical patent/EP2894647A1/de
Application granted granted Critical
Publication of EP2894647B1 publication Critical patent/EP2894647B1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/86—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve
    • 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
    • H01H9/342—Venting arrangements for arc chutes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/73—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in air at atmospheric pressure, e.g. in open air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • 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
    • H01H9/342—Venting arrangements for arc chutes
    • H01H2009/343—Venting arrangements for arc chutes with variable venting aperture function of arc chute internal pressure, e.g. resilient flap-valve or check-valve
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure

Definitions

  • the present invention relates to a unipolar breaking block. It also relates to a cut-off device comprising at least one unipolar breaking block.
  • the patent application FR2986659 discloses a modular switching device, comprising improved pneumatic tripping means.
  • This document describes a breaking device comprising at least one unipolar breaking block, and preferably three unipolar breaking blocks, each unipolar breaking block being connected to a trigger block at a downstream contact pad.
  • Each unipolar cutoff block also includes an upstream contact range for connection to a power line.
  • Such a unipolar break block comprises a housing comprising a bridge of movable contacts and connected to the contact pads, as well as two arc-breaking chambers opening on an opening volume of the contact bridge, each breaking chamber. being connected to at least one cutoff gas exhaust channel. In case of occurrence of arcing, cutoff gases pass through the exhaust channels and cause triggering of the opening of the contacts to achieve the power failure.
  • This unipolar breaking block comprises, for at least one exhaust channel, a rotary valve intended to be rotated by the passage of the cutoff gases around an axis of rotation substantially perpendicular to the exhaust channel, the rotation of the valve of a first obstruction position to a second trigger position being intended to actuate trigger means to cause the opening of the contacts.
  • the axis of rotation of the rotary valve is fixed to the side walls of the discharge channel so as to divide the valve into two non-symmetrical rotating surfaces, a first and a second surface which, moving from the first obstruction position towards the second trigger position clear two sections of gas passage in the exhaust gas channel.
  • the object of the present invention is to remedy this drawback, proposing a unipolar cut-off block with a rotary valve enabling both rapid triggering and avoiding obstruction of the channel after evacuation of the gases.
  • the rotary valve according to the invention comprises an edge positioned vis-a-vis with an internal wall of the exhaust channel, in the first position of obstruction, said edge being positioned at a first distance from said inner wall of the channel of the exhaust in the first position of obstruction, said edge being adapted to move away from the wall of the exhaust channel during rotation of the rotary valve, the position of the rotary valve defining at least a gas passage section.
  • the arrangement of the rotary valve and the inner wall is such that the distance between said edge and said inner wall remains constant and equal to said first distance to a first rotary angle threshold value of the rotary valve, and then increases linearly to a second angle of rotation threshold value corresponding to a complete opening of the discharge channel.
  • the rotary valve reaches in the release position an open position of the exhaust channel, which allows better evacuation of the cutoff gases and avoids obstruction of the channel.
  • the unipolar breaking block provided with this rotary valve can ensure several times the tripping after a short circuit.
  • the invention relates to an electrical cut-off device comprising at least one unipolar breaking block as briefly described above.
  • the cutoff device comprises three unipolar cutoff blocks coupled by means of at least one rod.
  • the figure 1 represents an example of an electrical cutoff device 2 according to an exploded perspective representation, comprising three unipolar cutoff blocks 4.
  • the switching device may comprise one, two, three or four unipolar breaking blocks.
  • Each unipolar break block 4 allows the cutting of a single pole.
  • Each cutoff block is in the form of a flat housing 6, for example made of molded plastic, formed of two large parallel faces 8, spaced apart by a thickness of about 23 millimeters (mm) for a 160 Ampere gauge ( AT).
  • the housing is preferably formed of two mirror symmetrical parts, secured by any suitable means.
  • Each unipolar block is connected to a trip unit 10, which may comprise magnetothermic means or electronic means, at a downstream contact pad 12 (see FIG. figure 2 ) and on the other hand to a current line connected to an upstream contact pad 14.
  • a trip unit 10 which may comprise magnetothermic means or electronic means, at a downstream contact pad 12 (see FIG. figure 2 ) and on the other hand to a current line connected to an upstream contact pad 14.
  • the unipolar cutoff blocks are assembled via spacers 16, which are for example made of molded plastic, and comprise a central partition 18 intended to be parallel to the large faces 8 of the unipolar cutoff blocks 4.
  • the clamping of the spacers 16 on top of each other is improved by bottom edges 20.
  • the unipolar cutoff blocks are intended to be driven simultaneously and coupled for this purpose by at least one rod 22.
  • One of the unipolar cutoff blocks includes a handle 24, adapted to be housed in the nose 26 of the device, and to control a mechanism 28 for actuating the electrical contacts.
  • the figure 2 illustrates in more detail the cut-off device 30 housed in the housing 6, according to an embodiment in which it is a rotary double-cut mechanism, suitable for applications up to 800 A.
  • the cutoff device 30 comprises a movable contact bridge 32 having at each end a contact pad. It comprises a pair of fixed contacts 34, 36, each fixed contact being intended to cooperate with a range of contacts of the movable contact bridge 32.
  • a first fixed contact 34 is intended to be connected to the current line by the contact pad upstream 14.
  • a second fixed contact 36 is intended to be connected to the trip unit 10 by the downstream contact pad 12.
  • the movable contact bridge 32 is mounted between an open position in which the contact pads are spaced apart from the fixed contacts 34, 36 and a closed position, which is a pass position for the electric current, in which the contact pads are in contact with each of the fixed contacts 34, 36.
  • the unipolar break block 4 comprises two arc cutting chambers 38 for extinguishing the electric arcs.
  • Each arc cutting chamber 38 comprises at least one stack of at least two deionization fins 40 separated from each other by a cutoff gas exchange space.
  • Each arc-breaking chamber 38 comprises at least one outlet connected to at least one exhaust channel 42 of the cut-off gases, intended to evacuate the gases through at least one opening opening 44.
  • the movable contact bridge 32 is rotatable about an axis of rotation Y.
  • the movable contact bridge 32 is mounted floating in a rotary bar 46 interposed between the two lateral faces 8 of the housing 6.
  • At least one exhaust channel 42 comprises a rotary valve 48 intended to be rotated by the passage of the cutoff gases.
  • the rotary valve 48 is rotated about an axis Z, substantially perpendicular to the exhaust channel 42.
  • the rotation of a first obstruction position to a second release position is intended to release the actuating mechanism 28 to cause the opening of the contacts 34, 36.
  • the unipolar cutoff blocks 4 are intended to be driven simultaneously, and are coupled for this purpose to at least one rod 22, in particular at the bar 46, for example through orifices 50.
  • the rotary valve 48 is in the first position of obstruction, illustrated in more detail in the Figures 3 and 4 described below.
  • FIGS. 3 to 4 illustrate in greater detail the first position of obstruction of the rotary valve 48, in which the edge 54 of the rotary valve cooperates with an internal wall 56 of the evacuation channel 42.
  • the edge 54 of the rotary valve is formed at the junction of a first face 58 and a second face 60 of the rotary valve, substantially parallel to the first face, the first face 58 extending into the discharge channel so as to restrict the passage of exhaust gas.
  • the edge 54 is positioned vis-à-vis the inner wall 56, at a first predetermined distance d1, which is preferably less than 0.2 millimeters.
  • a first cutoff gas passage section 62 is formed between the edge 54 of the rotary valve 48 and the inner wall 56 of the evacuation channel 42.
  • the rotary valve 48 is mounted near the arc-breaking chamber 38 and the movable contact bridge 32, at a second predetermined distance d2 and releases a second section 64 for passage of the gases.
  • the distance d2 is chosen very small, preferably of the order of 0.15 millimeters, and provides a clearance necessary for the movement of the rotary valve.
  • the total area of the first gas passage section 62 and the second gas passage section 64 is 7mm 2 (square millimeters) in the first obstructed position.
  • the rotary valve 48 When the rotary valve 48 is in the first position of obstruction, the rotary valve has an initial angular position in the first position of obstruction.
  • the rotary valve is rotated in the direction of rotation S to a full open position in which it is positioned in a final angular position.
  • the rotary valve stroke corresponds to an evolution of a rotation angle ⁇ between an initial angular value and a final angular value.
  • the stroke corresponds to the necessary rotation of a lever (not shown) to release the actuating mechanism 28.
  • the angular displacement between the initial angular value and the final angular value is between 39 ° and 41 °, preferably equal to 40 °.
  • the distance d between the edge 54 and the inner wall 56 changes with the angle of rotation ⁇ in the following manner: it remains constant and equal to the first distance d1 as long as the angle of rotation is less than a first value angle threshold, and increases linearly to a second rotation angle threshold value preferably equal to the final angular value corresponding to a complete opening of the discharge channel.
  • the first angle threshold value is equal to 12 °, and more generally between 11 ° and 13 °.
  • the figure 5 illustrates the positioning of the rotary valve 48 when it leaves the first obstruction position, and remains, during this first part of its travel, at a constant distance and equal to the inner wall 56 of the discharge channel 42, the angle of rotation ⁇ being smaller than the first threshold value.
  • FIGS. 6 and 7 illustrate the second triggering position of the rotary valve 48, in a full opening configuration following the release of cutoff gas in the breaking chambers 38.
  • the evacuation channel 42 has a bend 66, the inner wall 56 of the evacuation channel forming a convex zone 68.
  • the axis of rotation of the rotary valve 48 is positioned close to the convex zone. 68, so that the edge 54 is positioned vis-a-vis with a portion of the convex zone 68, on one side of the point of curvature of this convex zone 66.
  • the axis of rotation Z is positioned by relative to the flow of gas flow in a zone of the discharge channel where their flow is low and therefore not conducive to creating a pressure difference generating a torque.
  • the figure 8 illustrates a profile of the evolution of the total area of the first section 62 and second section 64 of passage of the gases as a function of the rotation angle ⁇ of the rotary valve 48 according to one embodiment of the invention.
  • the graph 70 comprises, on the abscissa 72, the value of the rotation angle ⁇ of the rotary valve which changes between the initial angle value 0 ° and the final angle value of 40 °.
  • On the ordinate 74 is shown the area of gas passage section in mm 2 (square millimeters).
  • the rotary valve is arranged vis-à-vis the discharge channel so that the cross sectional area remains constant and equal to 7mm 2 on a first portion 76, for a rotation angle ⁇ of the rotary valve between 0 ° and 12 °, then increases in a linear portion 78 between 7 mm 2 and 35 mm 2 for a rotation angle of 40 °.
  • the value of 35 mm 2 is substantially equal to the area of the section of the evacuation channel 42.
  • the figure 9 illustrates a rotary valve according to one embodiment of the invention, seen in perspective.
  • the axis of rotation Z of the valve 48 has shoulders 80 bearing against the internal lateral surfaces of the cutoff block.
  • the ends 82, 84 of the axis of rotation Z of the rotary valve are useful for connecting the respective rotary valves of the unipolar cut-off units in a modular electrical breaking device such as the device 2 illustrated in FIG. figure 1 .
  • the mechanical coupling between all the rotary valves of the cutoff blocks makes it possible to ensure the transmission of the rotational movement of one valve towards the others, in a cutoff device with several unipolar cutoff blocks.

Landscapes

  • Multiple-Way Valves (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Circuit Breakers (AREA)

Claims (8)

  1. Einpoliger Abschaltblock (4), der ein Gehäuse aufweist, umfassend:
    - eine bewegliche Kontaktbrücke (32),
    - ein feststehendes Kontaktpaar (34, 36), das mit der beweglichen Kontaktbrücke (32) zusammenarbeitet und jeweils mit einem Stromzuführungsleiter verbunden ist,
    - zwei Lichtbogenabschaltkammern (38), die sich jeweils zu einem Öffnungsvolumen der beweglichen Kontaktbrücke (32) öffnen, wobei jede Abschaltkammer (38) mit mindestens einem Auslasskanal (42) verbunden ist,
    - mindestens ein Auslasskanal (42), der ein Drehventil (48) aufweist, das vorgesehen ist, um eine im Wesentlichen senkrecht zum Auslasskanal (42) liegende Achse zur Drehung durch das Hindurchströmen von Abschaltgas angetrieben zu werden, wobei die Drehung des Drehventils (48) von einer ersten Verschlussposition in eine zweite Auslöseposition dazu dient, Auslösemittel (28) zu betätigen, um die Öffnung der Kontakte hervorzurufen, wobei die Drehung des Drehventils (48) durch einen Drehwinkel zwischen einem Anfangswinkelwert in der Verschlussposition und einem Endwinkelwert definiert ist,
    dadurch gekennzeichnet, dass das Drehventil (48) einen Rand (54) aufweist, der gegenüberliegend zu einer Innenwand (56) des Auslasskanals in der ersten Verschlussposition positioniert ist, wobei der Rand (54) in der ersten Verschlussposition in einer ersten Entfernung zu der Innenwand (56) des Auslasskanals (42) angeordnet ist und geeignet ist, sich bei der Drehung des Drehventils (48) von der Wand des Auslasskanals (42) zu entfernen, wobei die Position des Drehventils (48) mindestens einen Abschnitt (62, 64) für den Durchlass von Gas definiert, wobei die Anordnung des Drehventils (48) und der Innenwand (56) derart ist, dass die Entfernung zwischen dem Rand (54) und der Innenwand (56) bis zu einem ersten Schwellenwert des Drehwinkels des Drehventils (48) konstant und gleich der ersten Entfernung bleibt, dann bis zu einem zweiten Schwellenwert des Drehwinkels, der einer vollständigen Öffnung des Auslasskanals entspricht, sich linear erhöht.
  2. Einpoliger Abschaltblock nach Anspruch 1, dadurch gekennzeichnet, dass die erste Entfernung kleiner oder gleich 0,2 Millimeter ist.
  3. Einpoliger Abschaltblock nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Position des Drehventils (48) zwei Durchlassabschnitte (62, 64) definiert und dass die Gesamtfläche der Abschnitte bis zum ersten Schwellenwert des Drehwinkels des Drehventils (48) konstant ist, dann sich linear bis zum zweiten Schwellenwert des Drehwinkels erhöht, der einer vollständigen Öffnung des Auslasskanals entspricht.
  4. Einpoliger Abschaltblock nach Anspruch 3, dadurch gekennzeichnet, dass die Gesamtfläche bis zum ersten Winkelschwellenwert kleiner oder gleich 7 Quadratmillimeter ist.
  5. Einpoliger Abschaltblock nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste Winkelschwellenwert zwischen 11 und 13 Grad liegt, und der zweite Winkelschwellenwert zwischen 39 und 41 Grad liegt.
  6. Einpoliger Abschaltblock nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Auslasskanal einen Bogen (66) aufweist, der eine konvexe Innenzone (68) bildet, und dass das Drehventil (48) derart positioniert ist, dass für die Drehung des Drehventils (48) zwischen dem anfänglichen Winkelwert und dem ersten Winkelschwellenwert der Rand (54) des Ventils im Wesentlichen parallel zu der Wand des Auslasskanals (42) in der konvexen Innenzone (68) liegt.
  7. Abschaltvorrichtung, dadurch gekennzeichnet, dass sie mindestens einen einpoligen Abschaltblock nach einem der Ansprüche 1 bis 6 aufweist.
  8. Abschaltvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass sie drei einpolige Abschaltblöcke aufweist, die mittels mindestens einer Stange (22) verbunden sind.
EP15150726.6A 2014-01-13 2015-01-12 Unipolarer Abschaltblock, und mit einem solchen Block ausgestattete Abschaltvorrichtung Active EP2894647B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1450227A FR3016473B1 (fr) 2014-01-13 2014-01-13 Bloc de coupure unipolaire et dispositif de coupure comportant un tel bloc

Publications (2)

Publication Number Publication Date
EP2894647A1 EP2894647A1 (de) 2015-07-15
EP2894647B1 true EP2894647B1 (de) 2016-09-14

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ID=50976758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15150726.6A Active EP2894647B1 (de) 2014-01-13 2015-01-12 Unipolarer Abschaltblock, und mit einem solchen Block ausgestattete Abschaltvorrichtung

Country Status (6)

Country Link
US (1) US9508511B2 (de)
EP (1) EP2894647B1 (de)
CN (1) CN104779103B (de)
ES (1) ES2606196T3 (de)
FR (1) FR3016473B1 (de)
PL (1) PL2894647T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3439004A1 (de) * 2017-08-01 2019-02-06 Siemens Aktiengesellschaft Auslöseelement eines druckauslösers, druckauslöser mit solch einem auslöseelement und elektrischer schalter
DE102017131442B4 (de) 2017-12-29 2023-11-23 Eaton Electrical Ip Gmbh & Co. Kg Ein- oder mehrpoliger Leistungsschalter und modulares System umfassend einen solchen Leistungsschalter
EP3916745B1 (de) * 2020-05-28 2024-03-13 ABB Schweiz AG Elektrischer schalter

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238664B (en) * 1989-12-02 1994-06-22 Powered Showers Plc Flow switch assembly
FR2807565B1 (fr) * 2000-04-10 2003-03-14 Schneider Electric Ind Sa Pole pour un disjoncteur electrique limiteur de basse tension de puissance et disjoncteur muni d'un tel pole
US6373357B1 (en) * 2000-05-16 2002-04-16 General Electric Company Pressure sensitive trip mechanism for a rotary breaker
US6750743B1 (en) * 2003-05-13 2004-06-15 General Electric Company Integrated thermal and magnetic trip unit
US6930573B2 (en) * 2003-08-29 2005-08-16 General Electric Company Interlocking cassettes for dimensional stability
WO2009035638A1 (en) * 2007-09-11 2009-03-19 Siemens Energy & Automation, Inc. Double-break disconnect / contact system
ITMI20072204A1 (it) * 2007-11-21 2009-05-22 Abb Spa Dispositivo di interruzione uni-polare o multi-polare a doppia interruzione
DE102009015126A1 (de) * 2009-03-31 2010-10-14 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
MX2012003123A (es) * 2009-09-18 2012-04-10 Schneider Electric Ind Sas Unidad de corte de un solo polo que comprende un puente de contacto giratorio, dispositivo de conmutacion que comprende tal undiad y cortacircuitos que comprende tal dispositivo.
CN102891025B (zh) * 2011-07-22 2016-02-10 西门子公司 一种开关装置
FR2986659B1 (fr) * 2012-02-02 2014-02-14 Schneider Electric Ind Sas Bloc de coupure unipolaire et dispositif de coupure comportant un tel bloc

Also Published As

Publication number Publication date
FR3016473A1 (fr) 2015-07-17
CN104779103B (zh) 2019-07-09
FR3016473B1 (fr) 2017-10-13
EP2894647A1 (de) 2015-07-15
CN104779103A (zh) 2015-07-15
US20150200066A1 (en) 2015-07-16
PL2894647T3 (pl) 2017-03-31
US9508511B2 (en) 2016-11-29
ES2606196T3 (es) 2017-03-23

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