EP2743950B1 - Polaritätsunabhängiges Schaltgerät zum führen und trennen von Gleichströmen - Google Patents

Polaritätsunabhängiges Schaltgerät zum führen und trennen von Gleichströmen Download PDF

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Publication number
EP2743950B1
EP2743950B1 EP13196977.6A EP13196977A EP2743950B1 EP 2743950 B1 EP2743950 B1 EP 2743950B1 EP 13196977 A EP13196977 A EP 13196977A EP 2743950 B1 EP2743950 B1 EP 2743950B1
Authority
EP
European Patent Office
Prior art keywords
arc
switching device
switching
contact
contacts
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
EP13196977.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2743950A1 (de
Inventor
Karsten Gerving
Volker Lang
Johannes Meissner
Ralf Thar
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.)
Eaton Electrical IP GmbH and Co KG
Original Assignee
Eaton Electrical IP GmbH and Co KG
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 Eaton Electrical IP GmbH and Co KG filed Critical Eaton Electrical IP GmbH and Co KG
Priority to PL13196977T priority Critical patent/PL2743950T3/pl
Publication of EP2743950A1 publication Critical patent/EP2743950A1/de
Application granted granted Critical
Publication of EP2743950B1 publication Critical patent/EP2743950B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
    • 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
    • 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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging 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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts

Definitions

  • the invention relates to a polarity-independent switching device for guiding and separating high DC currents.
  • the switching device comprises a gas-tight, electrically insulating housing, which can be filled with an insulating gas, at least one pair of contacts, which is arranged in the housing and having a fixed contact and a movable contact, wherein the two contacts in an on state of the switching device in Contact to each other and in an off state of the switching device are separated, an arc runner assembly which generates a magnetic field at least in the region of the contact pair, and a first arc guiding arrangement, by means of which an arc occurring between the contacts with a first current direction in the direction of a remote from the contacts arranged Deletion area is passed.
  • Such a switching device is for example from the US Pat. No. 5,680,084 known.
  • the housing described therein is filled with a gas mixture comprising hydrogen.
  • the switching chamber walls and the extinguishing chambers are also subjected to thermal stress, which results in a limitation of the electrical life of the switching device.
  • the load of the switching device during the switching process is particularly high in the case of high arc performance, especially in the absence or low mobility of the arc, resulting in a relatively high contact erosion and material changes of the switching chamber walls by locally high thermal loads result.
  • a high thermal load of the switching chambers occurs in particular at high direct currents, which in contrast to comparable alternating currents have no sinusoidal current profile with natural zero crossing and thus have after separation of the switching contacts a consistently high arc performance.
  • it is therefore essential to minimize the burning time of the switching arc by its rapid cooling and deionization of the switching path. In this case, a rapid increase in the burning voltage is achieved, which leads to the extinction of the arc when reaching the driving voltage.
  • a very efficient arc quenching can be achieved if, instead of normal air as a switching environment, hydrogen or a hydrogen-containing gas mixture in the form of a hermetically sealed housing of the switch is selected. It is known that hydrogen molecules cause a very efficient cooling and deionization of the switching path due to significantly higher particle velocity compared to air molecules. As a result, when switching in a hydrogen atmosphere on a free-burning arc, a multiple of the arc voltage achievable with the same switching arrangement in air can be achieved. In practice, this means that you can build a higher arc voltage over a targeted elongation of the switching arc, caused by a magnetic blower field, as by the division of the arc into several partial arcs in the form of a classic arc splitter.
  • Encapsulated hydrogen-filled switching devices can be found today in several products in the form of compact relays for currents up to several hundred amps realized. Above all, these products are designed to permanently carry currents of this magnitude in the form of very compact arrangements and typically to switch them several thousand times. With these compact switching chambers, however, the achievable switching numbers are limited at high switching capacities by a gradually decreasing insulation capacity of such arrangements.
  • document DE 691 11 334 T2 shows a hermetically sealed, bidirectional DC switching device with fork-shaped arcs, which extend in separate arc extinguishing chambers.
  • the switch comprises two switching chambers.
  • the switching chambers have a double breaker with two separate immovable contacts each having a first contact region and a movable electrically conductive contact piece with two second contact regions.
  • An arc is driven in the direction of one of the extinguishing devices, depending on the field direction of a magnetic field and the current direction in the arc.
  • the switching chambers arc arc bleaching, which extend in two opposite directions in each case from the first contact region and the corresponding second contact region to two arranged at the end of the arc guide plates extinguishing chambers.
  • the switching device which is suitable for DC operation, comprises a gas-tightly encapsulated, electrically insulating housing which can be filled with an insulating gas.
  • the housing is at least one pair of contacts with a fixed contact and a arranged movable contact, wherein the two contacts are separated in an on state of the switching device in contact with each other and in an off state of the switching device.
  • two such pairs of contacts are provided per pole to realize a double interruption.
  • an arc runner arrangement At least in the region of the contact pair or contact pairs, an arc runner arrangement generates a magnetic field, in particular a substantially homogeneous magnetic field, which is also called a blow field and is suitable for driving one or more arcs.
  • a first arc guide arrangement for conducting an arc occurring between the contacts with a first current direction in the direction of an extinguishing region of the housing arranged remotely from the contacts.
  • the extinguishing area is initially to be understood as an area within the housing which is sufficiently far away from the contacts in order to prevent damage to the latter due to the influence of the arcs.
  • suitable additional measures for extinguishing the arc can be provided, which are described as preferred embodiments.
  • a second arc guide arrangement is provided such that an arc occurring between the contacts is also conducted in the direction of the extinguishing area with a second current direction opposite to the first current direction.
  • the advantage here is that the two Lichtbogenleitanssenen are designed such that the arc is directed independently of its current direction in the same direction, without the need for special insulating partitions would be required. Irrespective of the polarity of the arc, it can thus advantageously be rapidly driven into a region of the housing remote from the contacts, so that the contacts are subjected to less thermal stress. Since each arc is driven in the same direction regardless of the polarity, a correspondingly compact housing with advantageously low space requirements can be used.
  • a permanent magnetic field is generated by means of permanent magnets in order to provide a magnetic field in a simple manner and current-independent.
  • the first arc guide arrangement is designed such that an arc with a first current direction is deflected in a first direction of rotation and directed in the direction of the extinguishing area.
  • the second arc guide arrangement is arranged such that an arc is deflected with a second current direction in a direction of rotation opposite to the first direction of rotation and directed in the direction of the extinguishing area. This means that the arc is deflected independently of its current direction and is driven in the direction of the extinguishing area.
  • the paths which the arc must cover until it reaches the extinguishing area are preferably the same size in order to ensure the same switching behavior of the switching device in both current directions.
  • the fixed contact or the fixed contacts is / are connected to a housing bottom.
  • a particularly robust switch can advantageously be realized, which is only made possible by the fact that arcs can be driven independently of polarity in such a way that they move away from the housing bottom with the fixed contacts.
  • the housing bottom is therefore preferably arranged approximately opposite the extinguishing area, or the extinguishing area extends adjacent to a housing wall opposite the housing floor. This refers to a substantially cuboidal housing, but is analogous to any other housing forms transferable.
  • the electrodes are guided through the housing bottom to the contacts.
  • a switching piece is guided through a flexible gas seal through the housing bottom, wherein the movable contact is arranged on the switching piece and movable from outside the housing.
  • the contact piece is designed as a bridge switching piece, which carries two movable contacts.
  • two movable contacts are arranged on the bridge switching piece, wherein the bridge switching piece has an actuator which is guided via a flexible gas seal through the housing bottom.
  • a multi-pole switching device In a multi-pole switching device is provided that two bridge switching pieces each have a movable gas seal through the housing bottom movable actuator, wherein a rigid connection axis between the actuators outside the housing is provided for synchronization.
  • two bridge switching pieces are connected via a non-conductive switching bridge and have a common, movable via a flexible gas seal through the housing bottom actuator.
  • the part of the flexible gas seal facing the bridge contact piece is surrounded by a protective screen.
  • the flexible gas seal is particularly preferably designed as a bellows, in particular of a stainless steel material.
  • the first arc guide arrangement has a first section for deflecting the arc by approximately 90 ° and a second section for guiding the arc substantially rectilinearly.
  • each arc is extended along the arc guide assembly by increasing the distance of the base points.
  • the second portion of the first arc guide assembly is designed such that the arc becomes longer toward the extinguishing region, whereby the alignment of the arc is maintained parallel to the housing bottom.
  • the first arc guide assembly comprises an outer baffle and an inner baffle, wherein the outer baffle extends from the fixed contact and the inner baffle extending from the movable contact.
  • the outer baffle preferably extends substantially parallel to the side walls of the housing.
  • the inner baffle extends in the second section particularly preferably such that the distance to the outer baffle increases in the direction of the extinguishing area.
  • the second arc guide is designed mirror-symmetrically to the first arc guide.
  • the outer baffles of the first and second arc guide together with a contact carrier form a U-shape, wherein the contact carrier forms a web of the U-shape and wherein the fixed contact inside, based on the U-shape , is located in the area of the bridge.
  • the web of the U-shape in particular has a thickening directed towards the interior of the U-shape, on which the fixed contact is arranged.
  • the inner baffles of the first and second arc guide assembly together form a shape that corresponds to the contour of an onion shape.
  • a stepless transition from the respective contact to the baffle is provided.
  • the edge regions of the contacts in particular have a chamfer. This allows a faster, harmonious transition of the arc root from the contact surfaces to the rails, as a result, advantageously a material erosion is minimized by the arcs.
  • a quenching device with a plurality of electrically insulating, mutually parallel extinguishing plates in the region of the extinguishing area is provided per arc guide.
  • the extinguishing devices are preferably shaped such that the arc is widened meandering.
  • the extinguishing plates protrude differently far on an inlet side of the extinguishing devices.
  • alternately shorter and longer extinguishing plates are preferably provided.
  • the extinguishing plates each have a notch on an inlet side of the extinguishing devices, which are formed asymmetrically and / or arranged eccentrically. In particular, this results from the fact that the notches of all extinguishing plates form a groove with an odd course.
  • the insulating gas is hydrogen or a hydrogen-containing gas mixture.
  • FIGS. 1 to 3 show the switching device according to the invention in various representations, wherein in FIG. 2 and in FIG. 3 a housing 3 of the switching device for the sake of clarity is not shown.
  • the FIGS. 1 to 3 will be described together below.
  • the switching device according to the invention suitable for DC operation, comprises a gas-tight, electrically insulating housing 3 which can be filled with an insulating gas (not shown).
  • the housing 3 at least one pair of contacts 15, 21 is arranged with a fixed contact 15 and a movable contact 21, wherein the two contacts 15, 21 are separated in an on state of the switching device in contact with each other and in an off state of the switching device.
  • two such contact pairs 15, 21, 15 ', 21' are provided per pole 14 in order to realize a double interruption.
  • An arc runner assembly 81, 82 generates at least in the region of Contact pair 15, 21 and the contact pairs 15, 21, 15 ', 21', a magnetic field, in particular a substantially homogeneous magnetic field, which is also referred to as blow field and is suitable for driving one or more arcs.
  • a first arc guide arrangement 41, 42 is provided to conduct an arc occurring between the contacts 15, 21 with a first current direction in the direction of an extinguishing region 31 of the housing 3 arranged away from the contacts.
  • the extinguishing area 31 is to be understood as an area within the housing 3 which is sufficiently far away from the contacts 15, 21 in order to prevent damage to the latter due to the influence of the arcs.
  • a second arc guide arrangement 41 ', 42' is provided such that an arc occurring between the contacts 15, 21 is likewise conducted in the direction of the extinguishing area 31 with a second current direction opposite to the first current direction.
  • the fixed contact 15 is connected to a housing bottom 30, which is arranged approximately opposite the extinguishing region 31.
  • the erase area 31 is adjacent to a housing wall 33, which is opposite to the housing bottom 30. Side walls 32 may be formed integrally with the housing wall 33.
  • the contact apparatus consists in the embodiment shown of a double breaker arrangement with two identical contacts 15, 15 ', and a movable contact piece 20 with two movable contacts 21, 21'.
  • the fixed contacts 15, 15 ' are designed in such a way that they consist of a contact carrier 11 and a contact plate, which are preferably connected via a flat solder connection. From the contact carrier 11 from each two metal strips extend as outer Lichtbogenleitbleche 41 made of copper or other, erosion-resistant metal, in opposite directions, in the way that, starting from the contact carrier 11 initially ramped in the direction of the base plate 30 to subsequently gradually parallel towards the in FIG. 3 leaked longitudinal axis L shown.
  • This arrangement which thereby has the shape of a centrally inwardly dented "U", at the web 17 is in the middle of the fixed contact 15, has the function of an arc rail 41 for the on the fixed contacts 15 when opening the contact bridge 20 under electrical load resulting arc base points.
  • the contact carriers 11 each pass into electrodes 18, preferably in the form of cylindrical connecting pins 18, wherein the connecting pins 18 are fixedly connected to the base plate 30 of the hermetically sealed switching chamber 3 preferably via a solder connection in such a way that they are electrically insulated from one another.
  • the electrical insulation is realized in that the base plate 30 made of an insulating material, preferably made of ceramic.
  • the cylindrical connecting pins 18 serve to connect the two power supply lines 14.
  • the lateral surfaces 16 of the contacts 15 are in the direction of the arc runners 41, 41 be chamfered or chamfered in such a way that a smooth transition from the contact 15, 21, 15 ', 21' to the rails 41, 42, 41 ', 42' takes place, resulting in a fast, low-Abbrandern the switching arc of the contacts 15, 21, 15 ', 21' favors.
  • the U-shaped arc runner assemblies 41, 41 'of the two fixed contacts 15, 15' are arranged parallel to each other.
  • the bridge switching piece 20 For actuating the bridge switching piece 20, this is firmly connected in its center with a cylindrical switching axis as an actuator 22, which consists at least partially of insulating material and in the direction of the double arrow P along the axis L is movable.
  • a protective shield 26 of preferably metallic material concentrically In this case, the protective screen 26 is preferably connected to the connection plate 23 of the bridge contact piece 20 by means of a solder connection.
  • the bridge-side rails 42, 42 ' are in this case arranged with the festAND sectionen rails 41, 41' each in a plane in such a way that each belonging to a contact pair 15, 21 rails 41, 42 extend in a plane, the two planes the contact pairs in turn are parallel to each other.
  • a steadily diverging track arrangement is formed, with the aid of which an arc which moves away from a contact pair 15, 21 under the influence of a magnetic blow field continuously widens, the arc voltage continuously increasing.
  • an atmosphere of hydrogen or a hydrogen-containing gas mixture is achieved by the expansion of the arc to a multiple times higher arc voltage, so that in this way a very efficient extinguishing of the arc is made possible.
  • 15 ' can be in the movable contacts 21, 21' by a bevel of the lateral surfaces 16 of the contacts 21, 21 'in the direction of the arc runners 42, 42' achieve a continuous transition, which a fast, low-combustion migration of the switching arc of the contacts 21, 21 'favors.
  • the in the FIGS. 1 to 3 described switching chamber has a mirror-symmetrical structure, in such a way that the opening of the two pairs of contacts 15, 21, 15 ', 21' resulting partial arcs on the there acting homogeneous magnetic field regardless of the current flow direction always away from the contacts, each along one of the both diametrically opposite track arrangements 41, 42, 41 ', 42' are moved away with continuous expansion until the arcs meet the meandering chamber 50 located at the end of the diverging track pair, where they are further elongated due to their geometry and extinguished at the latest there, which will be discussed in more detail.
  • a plate-shaped pair of permanent magnets 81, 82 which are arranged in correct magnetic polarity parallel to each other, in such a way that the field lines are substantially perpendicular to the planes of the arc runners 41, 42, 41 ', 42' spanned.
  • a ferromagnetic arrangement of parallel pole plates can be used to produce a homogeneous permanent magnetic field, which are connected to one or more permanent magnets of sufficient field strength in a suitable manner.
  • a permanent magnetic arrangement can be located both inside and outside the encapsulated switching chamber 3. To realize a compact and inexpensive as possible switching chamber, however, it is expedient to arrange the permanent magnet assembly outside of the switching chamber.
  • the meandering chamber 50 in this case consists of a stacking arrangement of plates 71, 72, 73, 74 made of an erosion-resistant insulating material, preferably ceramic, which are fixed in a manner analogous to the deion-quenching chambers frequently used in air at a defined distance from each other in a frame, which also consists of insulating material.
  • a meandering chamber 50 run, as in FIG.
  • the switching arc facing the leading edges of this stack assembly not along a straight line, but the end faces of each adjacent plates 71, 72, 73, 74 are offset from each other in the direction of the arc front.
  • the stack arrangement can also consist of plates of different lengths, in such a way that here also on a shorter plate in each case a longer plate follows and vice versa, so that the end faces of adjacent plates in the direction of the arc front are offset from each other.
  • the switching arc divides into a plurality of individual partial arcs whose arc length corresponds to the clear distance between adjacent quenching plates
  • the total arc voltage generated in the Deionhunt as the sum of the voltages of all Partial arcs
  • the arc is not divided when entering a meandering chamber, but selectively extended by nestling to the individual chamber plates 71, 72, 73, 74 and by the blasfeld whatsoever influencee bulge in the space between the plates.
  • a further reinforcement of the arc bulge can be, as in FIG.
  • each pole has its own movable switching axis 22, 22 ', which is in each case sealed with a bellows 24, 24' gas-tight against the switching chamber 3.
  • the synchronization of the two switching axes 22, 22 ' takes place from outside the Switching chamber 3 via a rigid, movable in the direction of the double arrow P connection axis 90 between the switching axes.
  • a multi-pole design can also be carried out in such a way that the switching arrangements for each pole are housed in separate, hermetically sealed chambers (not shown), wherein for the switching bridges of each pole a separate bellows-sealed linear feedthrough exists whose synchronization again in the just described Way done via a rigid connection axis.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
EP13196977.6A 2012-12-13 2013-12-12 Polaritätsunabhängiges Schaltgerät zum führen und trennen von Gleichströmen Active EP2743950B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13196977T PL2743950T3 (pl) 2012-12-13 2013-12-12 Niezależne od biegunowości urządzenie przełączające do doprowadzania i odcinania prądu stałego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012112202.4A DE102012112202A1 (de) 2012-12-13 2012-12-13 Polaritätsunabhängiges Schaltgerät zum Führen und Trennen von Gleichströmen

Publications (2)

Publication Number Publication Date
EP2743950A1 EP2743950A1 (de) 2014-06-18
EP2743950B1 true EP2743950B1 (de) 2017-04-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13196977.6A Active EP2743950B1 (de) 2012-12-13 2013-12-12 Polaritätsunabhängiges Schaltgerät zum führen und trennen von Gleichströmen

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Country Link
US (1) US9224558B2 (pl)
EP (1) EP2743950B1 (pl)
DE (1) DE102012112202A1 (pl)
PL (1) PL2743950T3 (pl)

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FR3027727B1 (fr) * 2014-10-22 2016-12-09 Socomec Sa Chambre de coupure d'arc electrique
DE102014223529A1 (de) 2014-11-18 2016-05-19 Volkswagen Aktiengesellschaft Gleichspannungsschalter für Hochvolt-Bordnetze
DE102015000796B4 (de) * 2015-01-22 2017-03-02 Schaltbau Gmbh Schaltgerät mit permanentmagnetischer Lichtbogenlöschung
WO2017141197A1 (en) * 2016-02-18 2017-08-24 Circuit Breaker Industries Ltd Electrical switch incorporating an arc splitter arrangement
US10211003B1 (en) * 2017-11-22 2019-02-19 Carling Technologies, Inc. Single pole DC circuit breaker with bi-directional arc chamber
DE102018104415A1 (de) * 2018-02-27 2019-08-29 Tdk Electronics Ag Schaltvorrichtung
CN109285704B (zh) * 2018-10-16 2024-08-06 浙江正泰电器股份有限公司 双断点触头的灭弧结构
JP7443842B2 (ja) * 2020-03-11 2024-03-06 オムロン株式会社 電磁継電器
FR3126168B1 (fr) * 2021-08-11 2023-10-20 Safran Electrical & Power Contacteur double coupure bi-directionnel
FR3129522A1 (fr) * 2021-11-22 2023-05-26 Safran Electrical & Power Chambre de coupure pour courant continu bidirectionnel
FR3134224B1 (fr) * 2022-03-29 2024-05-03 Safran Electrical & Power Contacteur bidirectionnel double pole à double coupure à champs magnétiques inversés

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EP2463877A1 (de) * 2010-12-07 2012-06-13 Eaton Industries GmbH Schalter mit Löschkammer
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DE69111334T2 (de) * 1990-08-29 1996-03-21 Eaton Corp Bidirektionale Gleichstromschalteinrichtung mit gabelförmigen Lichtbogenlaufstücken, die sich in getrennten Lichtbogenlöschkammern erstrecken.

Also Published As

Publication number Publication date
PL2743950T3 (pl) 2017-08-31
US20140166620A1 (en) 2014-06-19
EP2743950A1 (de) 2014-06-18
DE102012112202A1 (de) 2014-06-18
US9224558B2 (en) 2015-12-29

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