EP2737506B1 - Protection pour courant continu - Google Patents

Protection pour courant continu Download PDF

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Publication number
EP2737506B1
EP2737506B1 EP12743713.5A EP12743713A EP2737506B1 EP 2737506 B1 EP2737506 B1 EP 2737506B1 EP 12743713 A EP12743713 A EP 12743713A EP 2737506 B1 EP2737506 B1 EP 2737506B1
Authority
EP
European Patent Office
Prior art keywords
contact
contact bridge
contactor according
bridge
recess
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
EP12743713.5A
Other languages
German (de)
English (en)
Other versions
EP2737506A1 (fr
Inventor
Karsten Gerving
Ralf Thar
Johannes Meissner
Volker Lang
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 EP12743713.5A priority Critical patent/EP2737506B1/fr
Publication of EP2737506A1 publication Critical patent/EP2737506A1/fr
Application granted granted Critical
Publication of EP2737506B1 publication Critical patent/EP2737506B1/fr
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
    • H01H33/182—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
    • 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
    • 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
    • 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
    • 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
    • H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts

Definitions

  • the invention relates to a contactor for DC operation, comprising a first and a second contact, which are formed as fixed contacts, and a third and a fourth contact, which are arranged on a contact bridge. Furthermore, the contactor comprises a guide, by means of which the contact bridge is movably mounted along a direction of movement, and a magnet arrangement for generating electromagnetic force on electric arcs.
  • the first and third contact and the second and fourth Kantakt respectively form pairs of contacts between which contact contact is made when the contact bridge is in a closed position.
  • DC motors and arc quenching apparatuses are usually used for DC applications.
  • the permanent magnets are arranged in the vicinity of the contact pairs. They each generate a magnetic field, which generates a force on the respective arc at a suitable polarity, which is usually referred to as "magnetic blast".
  • the arcs are driven by this force in the direction of arranged next to the contact pairs arc extinguishing devices such as extinguishing chambers.
  • the permanent magnets may have the same polarity.
  • both arcs are driven with proper use each in one of the extinguishing chambers.
  • both arcs will not be moved into the quenching chambers due to the effect of the blast fields, but in the opposite direction, which may cause them to remain in one place for too long, thus causing the negative effects described above.
  • the permanent magnets usually have a mutually opposing polarity.
  • the two arcs are thus moved in the same direction due to the oppositely directed current flow.
  • one arc is always driven in the direction of the quenching chamber and the other is driven away from the quenching chamber. Therefore, appropriate measures must be taken to prevent the negative effects caused by one of the arcs.
  • the present invention is therefore based on the object to provide an improved contactor for bidirectional DC operation.
  • the contactor according to the invention is characterized in that the movable contact bridge has at least one recess which is arranged between the guide and the third contact, wherein the at least one recess is formed such that an opening is provided on the contact bridge; through which an arc produced at the third contact can occur in the direction of the direction of movement of the contact bridge. Through this opening arcs can escape, which are blown by the magnetic field for guidance.
  • a corresponding recess may be arranged between the guide and the fourth contact.
  • This further recess can be identical in terms of their design and their spatial arrangement to the recess between the guide and third contact. The following comments on the last-mentioned recess therefore also refer to the recess between the guide and the fourth contact.
  • the contactor according to the invention further comprises in a preferred embodiment in each case a contact pair associated permanent magnets and arc quenching devices.
  • the two magnets are preferably oppositely poled. Arcing when opening the contacts arcs, so regardless of the current direction in the contactor always one of the arcs is driven by the magnetic field of one of the magnets in the direction of the associated extinguishing device. The other arc, however, moves towards the leadership of the contact bridge.
  • the recess prevents the arc from damaging the guide wreaks. Rather, the arc is guided by suitable Umleitbleche through the recess and away from the contacts. In this way, damage to the materials in the region of the contacts and the leadership of the contact bridge can be prevented.
  • At least one of the permanent magnets is provided with a pair of pole plates, which at least partially surround the contact pair, which is associated with the permanent magnet, laterally.
  • the pole plates provide a relatively homogeneous magnetic field in the area of the contacts, which further strengthens the force on the arcs.
  • the other permanent magnet can be equipped with pole plates accordingly.
  • the contact bridge comprises a substantially strip-shaped basic body with an upper side, a lower side, two longitudinal sides and two narrow sides.
  • the contact bridge can be made of a metal strip.
  • the at least one recess in the contact bridge is formed in the form of an indentation, which is open to one of the longitudinal sides of the contact bridge.
  • the indentation is understood as a spatial area that is accessible both from the top side, the underside, as well as from one of the longitudinal sides of the contact bridge.
  • the contact bridge has said two recesses each in the form of indentations, wherein the recesses may be open to the same longitudinal side of the contact bridge or opposite longitudinal sides of the contact bridge.
  • the at least one recess in the contact bridge may be L-shaped.
  • the contact bridge preferably has an extension on at least one of its narrow sides, which has an angle to the main body of the contact bridge.
  • another extension can also be formed on the other narrow side, which can be identical or approximately identical to the first-mentioned extension in terms of shape and arrangement.
  • the extension extends substantially away from the fixed contacts and can serve to guide the arcs in the direction of suitable extinguishing devices.
  • the extension preferably extends substantially perpendicular to the main body of the contact bridge.
  • the extension and the base are at an angle of 90 °.
  • the extension can also be designed such that it extends substantially parallel to the main body. Extension and body form two mutually spaced U-legs.
  • the angle at U-shaped arrangement of the extension is then 180 °.
  • the angle can also assume values of 90 ° to 180 °, for example 120 or 150 °.
  • the contact bridge In the region of the recess, the cross-section of the contact bridge is reduced.
  • the contact bridge there preferably has a widening or a widening section.
  • the widenings may be formed for example as additional bends, which are integrally formed on one of the longitudinal sides of the base body.
  • a first deflecting plate may be arranged, which at least partially engages in the at least one recess of the contact bridge.
  • the contactor may have a further, second deflecting plate, which engages in the other recess of the contact bridge.
  • the first deflecting plate is arranged between the guide of the contact bridge and the third contact, while the second deflecting plate is arranged between the guide of the contact bridge and the fourth contact.
  • the first deflecting plate comprises an angled section.
  • the angled section preferably forms a substantially right angle with the remaining part of the deflecting plate.
  • the contactor according to the invention comprises a first partition, which is arranged between the guide of the contact bridge and the third contact, preferably between the guide of the contact bridge and the first baffle.
  • the first partition at least partially engages in the at least one recess of the contact bridge. It is made of an insulating material such as ceramic or plastic and serves as an additional protection against the damage caused by an arc.
  • the contactor may have a further, second partition which is arranged between the guide of the contact bridge and the fourth contact and engages in the other recess of the contact bridge.
  • a further preferred embodiment of the invention provides that a respective quenching chamber is arranged adjacent to the contact pairs. At least one of the arcs can be directed by the magnetic field of one of the permanent magnets in a suitable polarity in one of the extinguishing chambers.
  • arc guide plates are arranged between each of the pairs of contacts and the extinguishing chamber arranged adjacent thereto. The arc guide plates are designed such that the distance between baffles leading to the same quenching chamber, increases in the direction of this quenching chamber.
  • FIG. 1 is a partial perspective view of a contactor 1 according to the invention shown.
  • the contactor 1 comprises a first contact 21 and a second contact 22, a third contact 31 and a fourth contact 32.
  • the first contact 21 and the second contact 22 are formed as fixed contacts.
  • the third contact 31 and the fourth contact 32 are arranged on a contact bridge 4.
  • the contact bridge 4 is movably mounted on a guide 9.
  • the contact bridge 4 can by the movable mounting between a closed position in which a contact contact between a first contact pair, consisting of the first contact 21 and the third contact 31, and a second contact pair consisting of the second contact 22 and the fourth contact 32nd , is given and moved to an open position. In the open position, no contact is made between the first contact 21 and the third contact 31 and the second contact 22 and the fourth contact 32.
  • the contact bridge 4 is located in FIG. 1 in the open position.
  • the contactor 1 comprises a magnet arrangement, which consists of two permanent magnets 51, which are oppositely poled. The direction of the magnetic fields is indicated by the arrows 52.
  • the contact bridge 4 comprises two recesses 42, which are each arranged between one of the contacts 31, 32 and the guide 9 of the contact bridge (a detailed description of the contact bridge is later in the context of the description of the Figures 3 and 4 ). Furthermore, the contactor 1 comprises two deflecting plates 7, which are each arranged between one of the contacts 31, 32 and the guide 9 of the contact bridge. Each of the two baffles 7 engages in one of the recesses 42. Adjacent to the baffles 7 insulating on their side facing the guide 9 of the contact bridge 4 side partitions 71 are arranged, each of which partially engage in one of the recesses 42.
  • the contactor 1 further comprises two arc extinguishing chambers 81 and arc guide plates 82.
  • the arc guide plates 82 are designed such that the distance between baffles 82, which lead to the same quenching chamber 81, increases in the direction of this quenching chamber.
  • the magnetic fields of the permanent magnets 51 generate a force on each of the arcs formed when the contacts are opened. Due to the opposite polarity of the permanent magnets, one of the arcs is always directed away from the contacts, via the arc guide plates 82 into an arc extinguishing chamber 81, where it can be extinguished.
  • FIG. 2a is a side view of the contactor 1 shown in longitudinal section. Regarding the individual components and peculiarities is therefore on the description too FIG. 1 pointed.
  • the magnetic fields of the permanent magnets 51 generates a force on each of the arcs 8 formed when the contacts are opened.
  • the arcs 8 are in FIG. 2a only shown in a schematic representation.
  • the direction of force is in FIG. 2a sketched by a vector arrow based on the arc. Due to the opposite polarity of the permanent magnets, one of the arcs 8 is always directed away from the contacts, via the arc guide plates 82 into an arc extinguishing chamber 81, where it can be extinguished.
  • the respective other arc 8, however, is driven in the direction of the guide 9 of the contact bridge 4.
  • FIG. 2b shows the contactor 1 according to FIG. 2a but at a later date. Due to the design of the arc guide plates 82, which widen in the direction of the quenching chamber 81, the arc 8 now in the vicinity of the quenching chamber 82 is also widened, which additionally contributes to its cooling. The other arc 8, however, is guided away from the third contact 31 through the recess 42 and via the deflecting plate 7. Optionally, 4 arc quenching plates can be arranged over the contact bridge, so that the deflected arc 8 can finally be driven between the quenching plates and deleted there.
  • FIG. 3 shows a perspective view of the contact bridge.
  • FIG. 4 shows the contact bridge in plan view.
  • the contact bridge 4 has a substantially strip-shaped basic shape with a top 401, a bottom 402, two longitudinal sides 403 and two narrow sides 404. At the bottom of the contact bridge 4 are the third contact 31 and the fourth contact 32nd
  • the contact bridge 4 comprises the two recesses 42, in the form of Indentations are formed.
  • the two recesses 42 are open to a longitudinal side 403 of the contact bridge 4.
  • the two recesses 42 are viewed from above ( FIG. 4 ) L-shaped.
  • the recesses 42 are configured such that movement of an arc 8 (FIG. FIG. 2a . 2 B ) is interrupted along the contact bridge 4 on a direct path between one of the contacts 31, 32 and the elevation 47. If, for example, an arc 8 arises at the third contact 31, then it will first be activated by the action of the permanent magnets 51 (FIG. FIG. 1 ) are driven along the contact bridge 4 in the direction of the elevation 47. However, its movement in the direction of the elevation 47 is stopped at the recess 42 and the arc 8 can be deflected in the direction of movement of the contact bridge 4. In this way, the arc 8, the guide 9 ( FIG. 1 ) do not reach.
  • the contact bridge on its narrow sides 404 extensions 43.
  • the extensions 43 extend substantially away from the third contact 31 and the fourth contact 32 and form a substantially right angle with the main body of the contact bridge 4.
  • the contact bridge 4 along one of the longitudinal sides 403 widening portions 44, which serve to increase the cross section of the contact bridge 4.
  • the contact bridge has sufficient cross-section to conduct current without much resistance between the contacts 31, 32 can.
  • FIG. 5 shows a schematic representation of a magnet arrangement of the contactor 1 according to the invention FIG. 1 and 2a-b with a permanent magnet 51 and two pole plates 53.
  • the permanent magnet 51 and the pole plates 53 generate a magnetic field whose direction is indicated by the arrows 52.
  • a contact pair consisting of the first and the third contact or of the second and the fourth contact (not shown), is preferably arranged between the two pole plates 53.

Landscapes

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

Claims (16)

  1. Protection pour exploitation à courant continu, comprenant :
    - un premier contact (21) et un deuxième contact (22), qui se présentent sous la forme de contacts fixes, ainsi qu'un troisième contact (31) et un quatrième contact (32),
    - un pont de contacts (4), qui porte les troisième et quatrième contacts (31, 32),
    - une coulisse (9) par laquelle le pont de contacts (4) est monté mobile le long d'une direction de déplacement,
    - un aménagement d'aimants (5) pour produire une force électromagnétique sur des arcs électriques (8), qui apparaissent lors de l'ouverture des contacts (21, 22, 31, 32), dans laquelle, en position fermée du pont de contacts (4), il se produit un contact fermé entre une première paire de contacts, qui comprend le premier et le troisième contact (21, 31), et entre une seconde paire de contacts, qui comprend le deuxième et le quatrième contact (22, 32), caractérisée en ce que le pont de contacts mobiles (4) présente au moins un évidement (42), qui est aménagé entre la coulisse (9) et le troisième contact (31), dans laquelle le au moins un évidement (42) est conçu de sorte que soit ménagée sur le pont de contacts (4) une ouverture à travers laquelle un arc électrique (8) formé sur le troisième contact (31) peut prendre la direction de déplacement du pont de contacts (4).
  2. Protection selon la revendication 1, caractérisée en ce que l'aménagement d'aimants (5) comprend un premier et un deuxième aimant permanent (51), dans laquelle le premier aimant permanent (51) est affecté à la première paire de contacts et le deuxième aimant permanent (51) à la seconde paire de contacts, dans laquelle chaque aimant permanent (51) est aménagé au voisinage de la paire de contacts qui lui est affectée et dans laquelle les deux aimants permanents (51) présentent une polarité mutuellement opposée.
  3. Protection selon la revendication 2, caractérisée en ce qu'au moins l'un des aimants permanents (51) est pourvu d'une paire de tôles polaires (53) qui enserrent au moins en partie latéralement la paire de contacts à laquelle l'aimant permanent (51) est affecté.
  4. Protection selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le pont de contacts (4) présente un corps de base sensiblement en forme de bande avec une face supérieure (401), une face inférieure (402), deux côtés longs (403) ainsi que deux côtés courts (404).
  5. Protection selon la revendication 4, caractérisée en ce que le au moins un évidement (42) se présente sous la forme d'une rainure qui est ouverte sur l'un des côtés longs (403) du corps de base du pont de contacts (4).
  6. Protection selon la revendication 5, caractérisée en ce que le pont de contacts mobile (4) présente deux évidements (42) sous la forme de rainures, dans laquelle les rainures sont ouvertes sur le même côté long (403) ou sur les côtés longs opposés (403) du pont de contacts (4).
  7. Protection selon l'une quelconque des revendications 4 à 6, caractérisée en ce que le pont de contacts mobile (4) comprend sur au moins l'un de ses petits côtés (404) un prolongement (43) qui fait un angle avec le corps de base.
  8. Protection selon la revendication 7, caractérisée en ce que l'angle entre le prolongement (43) et le corps de base atteint sensiblement 90°.
  9. Protection selon la revendication 7, caractérisée en ce que l'angle entre le prolongement (43) et le corps de base atteint sensiblement 180°.
  10. Protection selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le pont de contacts (4) dispose, dans la zone d'au moins un évidement (42), d'au moins une section d'extension (44) pour renforcer la section transversale du pont de contacts (4).
  11. Protection selon l'une quelconque des revendications 1 à 10, caractérisée en ce que le au moins un évidement (42) est en forme de L dans le pont de contacts (4).
  12. Protection selon l'une quelconque des revendications 1 à 11, caractérisée en ce qu'il est agencé entre la coulisse (9) du pont de contacts (4) et le troisième contact (31) une tôle de dérivation (7) qui s'engage au moins en partie dans le au moins un évidement (42) du pont de contacts (4).
  13. Protection selon la revendication 12, caractérisée en ce que la tôle de dérivation (7) présente une section repliée sensiblement à angle droit.
  14. Protection selon l'une quelconque des revendications 1 à 13, caractérisée en ce qu'il est agencé entre la coulisse (9) du pont de contacts (4) et le troisième contact (31) une paroi séparatrice isolante (71) qui s'engage au moins en partie dans le au moins un évidement (42) du pont de contacts (4).
  15. Protection selon l'une quelconque des revendications 1 à 14, caractérisée en ce qu'il est agencé respectivement une chambre d'extinction d'arcs électriques (81) au voisinage des deux paires de contacts.
  16. Protection selon la revendication 15, caractérisée en ce que sont agencées entre la première paire de contacts et la chambre d'extinction (81) qui lui est voisine des premières tôles d'arcs électriques (82) et entre la deuxième paire de contacts et la chambre d'extinction (81) qui lui est voisine des deuxièmes tôles d'arcs électriques (82), qui sont respectivement affectées à l'une des chambres d'extinction d'arcs électriques (82) et qui, lors d'un aménagement d'aimants (5) polarisés de manière appropriée, acheminent l'un des deux arcs électriques (8) dans la direction de la chambre d'extinction d'arcs électriques (81) qui leur est affectée, et en ce que les tôles conductrices d'arcs électriques (82) sont conçues de sorte que la distance entre les premières tôles conductrices d'arcs électriques et la distance entre les deuxièmes tôles conductrices d'arcs électriques (82) augmentent dans la direction des chambres d'extinction (81) d'arcs électriques qui leur sont affectées.
EP12743713.5A 2011-07-28 2012-07-27 Protection pour courant continu Active EP2737506B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12743713.5A EP2737506B1 (fr) 2011-07-28 2012-07-27 Protection pour courant continu

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11175847A EP2551867A1 (fr) 2011-07-28 2011-07-28 Protection pour courant continu
PCT/EP2012/064809 WO2013014281A1 (fr) 2011-07-28 2012-07-27 Protection pour fonctionnement en courant continu
EP12743713.5A EP2737506B1 (fr) 2011-07-28 2012-07-27 Protection pour courant continu

Publications (2)

Publication Number Publication Date
EP2737506A1 EP2737506A1 (fr) 2014-06-04
EP2737506B1 true EP2737506B1 (fr) 2015-03-25

Family

ID=46634128

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11175847A Withdrawn EP2551867A1 (fr) 2011-07-28 2011-07-28 Protection pour courant continu
EP12743713.5A Active EP2737506B1 (fr) 2011-07-28 2012-07-27 Protection pour courant continu

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11175847A Withdrawn EP2551867A1 (fr) 2011-07-28 2011-07-28 Protection pour courant continu

Country Status (3)

Country Link
US (1) US8937519B2 (fr)
EP (2) EP2551867A1 (fr)
WO (1) WO2013014281A1 (fr)

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DE102007054958A1 (de) * 2007-11-17 2009-06-04 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
US8395463B2 (en) * 2008-03-19 2013-03-12 Panasonic Corporation Contact device
KR101681591B1 (ko) * 2010-01-25 2016-12-01 엘에스산전 주식회사 전자 개폐기

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US20140151338A1 (en) 2014-06-05
EP2551867A1 (fr) 2013-01-30
US8937519B2 (en) 2015-01-20
EP2737506A1 (fr) 2014-06-04
WO2013014281A1 (fr) 2013-01-31

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