EP2597666A1 - Commutateur pour courant continu doté d'au moins une chambre de commutation - Google Patents

Commutateur pour courant continu doté d'au moins une chambre de commutation Download PDF

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Publication number
EP2597666A1
EP2597666A1 EP11190519.6A EP11190519A EP2597666A1 EP 2597666 A1 EP2597666 A1 EP 2597666A1 EP 11190519 A EP11190519 A EP 11190519A EP 2597666 A1 EP2597666 A1 EP 2597666A1
Authority
EP
European Patent Office
Prior art keywords
switching
switch according
contact
bridge
switch
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.)
Withdrawn
Application number
EP11190519.6A
Other languages
German (de)
English (en)
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 Industries GmbH
Original Assignee
Eaton Industries GmbH
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 Industries GmbH filed Critical Eaton Industries GmbH
Priority to EP11190519.6A priority Critical patent/EP2597666A1/fr
Priority to PCT/EP2012/073603 priority patent/WO2013076303A1/fr
Publication of EP2597666A1 publication Critical patent/EP2597666A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a switch for a polarity-independent DC operation with at least one switching chamber, each switching chamber having two switching pieces each having a first contact region, wherein the switching pieces are arranged substantially parallel to each other and wherein each switching chamber a movable and electrically conductive bridge switching piece with two second contact areas for Producing an electrically conductive connection between the first and second contact regions and for separating at least one of the second contact regions from the respective first contact region.
  • Electrical switches are components in a circuit that establish or disconnect an electrically conductive connection by means of internal, electrically conductive contacts. With a live connection to be cut, current flows through the contacts until they are separated. When an inductive circuit is disconnected by a switch, the current flow does not reduce immediately to zero, so that an arc can form between the contacts.
  • the arc is a gas discharge by a per se non-conductive medium, such as air.
  • AC alternating current
  • arcs usually erase at the zero crossing of the alternating current. Since such a zero crossing of the current in switches with DC operation (DC) is missing, stable arcing can occur when disconnecting the contacts.
  • An object of the invention is to provide a switch with a faster and / or more reliable erasure behavior of resulting turn-off arcs than the prior art.
  • each switching chamber has two contact pieces, each with a first contact region, and an electrically conductive bridge contact piece which can be moved with a switching bridge.
  • An electrically conductive connection between the first and second contact regions can be produced via the bridge contact element, wherein a breaker switch can only be disconnected via one of the contact pairs of the first and second contact regions, while the other contact pair remains permanently connected, for example via a stranded conductor.
  • a double break switch is disconnected both second contact areas of the respective first contact area.
  • the switching pieces are arranged substantially parallel to one another and preferably extend in a longitudinal direction through the switching chamber.
  • each chamber preferably has at least two magnets, in particular permanent magnets.
  • the bridge contact piece is arranged substantially transversely to the contact pieces and has at least two movable, bow-shaped angled arc conductors.
  • the arc conductors are to be understood as movable with respect to the switching chamber. The movement thus takes place together with the bridge switching piece, not relative to this.
  • the bridge switch piece is arranged transversely to the switching pieces, which is to be understood in that the bridge switching piece with the substantially parallel switching pieces forms an angle of more than zero degrees.
  • the bridge switching piece is preferably aligned substantially perpendicular to the switching pieces, since the arc is moved by the magnetic field along the switching pieces and thus the angled bridge switching piece is thus advantageously affected slightly by the influence of the arc.
  • the angled movable arc conductors run in the same plane as the contact pieces, but removed by the skid-shaped bend of these. As a result, the arc is advantageously widened.
  • the switching pieces are angled in sections adjacent to the contact areas to fixed arc conductors.
  • at least two extinguishing devices are provided per switching chamber or contact pair for extinguishing arcing, which can occur during separation of the first and second contact regions.
  • Particularly preferably four erasing devices are provided for polarity-independent erasing of the arcs.
  • the movable arc conductors preferably extend from the second contact areas toward the extinguishing devices.
  • the Fixed arc conductors also preferably extend from the first contact areas toward the extinguishing devices. It is particularly preferred that a distance of the fixed arc conductor from the movable arc conductors increases in the direction of the extinguishing devices.
  • the bridge switching piece between the second contact areas on a crank there is provided that at least two magnets are provided for generating a magnetic field, wherein an additional magnet for influencing the magnetic field is arranged on a movable switching bridge, wherein the switching bridge also carries the bridge or the bridge pieces.
  • the additional magnet is in particular movable to amplify the magnetic field strength with the switching bridge in a region of the separable first and second contact areas, which is made possible by the cranking of the bridge switching piece.
  • the field strength of the magnetic field is significantly increased in this area by the additional magnet, which allows an advantageously accelerated erasing of arcs.
  • the additional magnet is preferably arranged in a recess in the movable switching bridge in height of the contact areas.
  • the magnetic field is used to exert a magnetic force on the arc or arcs, so that at least one of the arcs, preferably independently of the current direction in the arc, is driven in the direction of one of the extinguishing devices, wherein the contact pieces of the switching chambers are arranged so that the second contact areas are located in a line substantially perpendicular to the direction of movement of the arcs.
  • the additional magnet is movable to amplify the magnetic field strength with the switching bridge in a region of the separable first and second contact areas.
  • the auxiliary magnet is movable in close proximity to the region of the first and second contact regions, not between the first and second contact regions.
  • the at least two magnets are, for example, at least twice as far away from the first and second contact regions as the additional magnet.
  • the at least two magnets can in particular be arranged outside the switching chamber or in the region of the switching chamber wall, also on the inside of the switching chamber wall, preferably in an insulating pocket.
  • the magnets are preferably designed as at least two plate-shaped magnets whose surfaces are arranged parallel to each other.
  • the two switching chambers are provided for a multi-pole operation.
  • the two switching chambers in particular have a common switching bridge for moving the bridge contact pieces and for electrical insulation of the switching chambers against each other.
  • an additional magnet is arranged on the common switching bridge for each switching chamber.
  • the two switching chambers are arranged one above the other, seen in a direction of movement of the switching bridge.
  • the switch has a modular construction, wherein the switch is provided with only one switching chamber for a single-pole operation and can be extended by adding at least one second switching chamber for a multi-pole operation.
  • Further preferred switching pieces are designed for multi-pole operation such that the terminals of the switch with respect to their position and / or installation position correspond to a multi-pole AC switch.
  • a faulty wiring due to an unfamiliar position of the terminals in DC switches over the AC switches used much more often over a long time is thereby advantageously avoided.
  • FIG. 1 shows a switch according to the invention, in particular a multi-pole, independent of the current direction compact switch according to the invention in an operation to show an efficient quenching behavior by the shortest possible arc time.
  • the connections of the main current paths or contact pieces 10a, 20a are arranged opposite to each other at the same level, relative to the installation depth of the switch, as in the case of a commercially available AC contactor.
  • the opposing contact pieces 10b, 20b are in the FIG. 1 arranged behind the switch and therefore only in the rest Figures 2 and 3a or 3b recognizable.
  • the switch in the form of two superimposed switching chambers 41 a, 41 b of preferably identical construction ,
  • the switching arrangements for each pole are housed in two separate, identical switching chambers 41 a, 41 b, which are arranged one above the other.
  • the switching chambers 41 a, 41 b are mounted with their opening sides facing each other.
  • the two switching chambers 41 a, 41 b are sealed against each other by a partition 43 made of insulating material. In this way, a cost-effective solution is realized with compact installation conditions.
  • the partition wall 43 is designed as a lid, the switch according to the invention can also be constructed modular, either single-pole with only one switching chamber 41 b or two-pole with two switching chambers 41 a, 41 b.
  • the first pole or the first switching chamber 41a has two contact pieces 10a, 10b, each having a first contact region 11 and a bridge bridge 30 movable and electrically conductive Brückenschalt Georgia 30 with two second contact areas 31 for producing an electrically conductive connection between the first and second contact areas 11, 31 and for separating the second contact areas 31 from the respective first contact area 11.
  • the second switching chamber 41b has two switching pieces 20a, 20b each having a first contact region 21.
  • the bridge contactor 30 with second contact regions 31 is identical to the first switching chamber 41a and therefore also designated.
  • the movable bridge switching pieces 30 of both poles are in this case arranged one above the other at the common switching bridge 35, whereby a synchronized switching process is realized for both poles.
  • the first and second contact areas 11, 31 and 21, 31 become hereinafter also referred to as fixed contact areas 11, 21 and movable contact areas 31 which form contact pairs.
  • the pairs of contacts each have two opposite, preferably identical extinguishing devices 61, 62.
  • the extinguishing devices are preferably designed as so-called Deion chambers, which consist of a stack arrangement of mutually electrically insulated sheets 66 each having an air gap between two adjacent sheets.
  • the extinguishing devices from a simple niche arrangement without splitter stacks, with walls of insulating material, preferably made of thermosetting plastic or ceramic, consist, the individual niches are spatially sufficiently sealed against each other and each an outer wall with suitably dimensioned exhaust openings is broken, which for pressure relief against the switching operation caused by the switching arcs caused by the pressure increase.
  • the movable contact areas 31 are located respectively at the intersection between the bridge contact piece 30, which are rotated by about 90 degrees against the connecting axis of two opposing extinguishing devices 61, 62, and from there right angle outgoing arc runners 32. Between the contact areas 31, each bridge contact piece on a crank whereby the auxiliary magnet 51c can be positioned in the immediate vicinity of the contact regions 31.
  • FIGS. 3a and 3b are two perspective views of the switch according to FIG. 1 , but without chamber walls of the switching chambers 41 a, 41 b, shown.
  • the perspective in FIG. 3a corresponds to the FIG. 1
  • the FIG. 3b a 90 degree rotated perspective shows.
  • the switching pieces 10a, 10b, 20a, 20b are designed differently with the fixed contact areas 11, 21 for the two poles of the switch, which are additionally described below with reference to FIGS FIGS. 3a and 3b to be discribed.
  • a parallel offset of the two contact pieces 10a, 10b is achieved, in such a way that both are aligned in parallel to each other current paths in the direction of the longer chamber side.
  • the switching pieces 20 a, 20 b executed in a similar manner, but with the difference that both switching pieces 20 a, 20 b immediately after entry into the switching chamber 41 b initially at right angles in a direction parallel to the short side of Switching chamber 41 b are angled so that they extend in the direction of the chamber bottom.
  • the one switching piece 20a is subsequently again angled 90 degrees in the direction parallel to the short chamber wall to be angled in front of the chamber wall again at right angles in the direction parallel to the chamber bottom. In this way, the switching piece 20a is guided parallel to the longitudinal-side chamber wall analogously to the switching chamber 41a of the first pole along the chamber bottom.
  • the second switching piece 20b is again bent at right angles in the region of the chamber bottom in such a way that it is parallel to the first contact piece along the chamber bottom.
  • the two switching pieces 20a, 20b extend from the switching chamber wall initially below the extinguishing devices 61, 62. Outside the same, they are angled obliquely upward again, so that the two fixed contact areas 21 equal to the center of the extinguishing devices 61, 62 are arranged.
  • a switch is realized with an optimized arc running behavior, in such a way that the resulting switching arcs are directed under the action of magnetic Blasfelder within very short times targeted in the direction of one of the extinguishing device 61, 62. Due to the special design of the contact pieces 10a, 10b, 20a, 20b is further achieved that the connections of the main current paths are arranged with respect to position and depth as in a multi-pole AC switch.
  • each of the two switching chambers 41 a, 41 b an arrangement of at least two permanent magnets 51 a, 51 b and an additional magnet 51 c arranged.
  • the two magnets 51a, 51b may, for example, be arranged outside the switching chambers 41a, 41b, while the additional magnet 51c for influencing the magnetic field is arranged on the movable switching bridge 35, preferably in each case at the level of the movable contact areas 31.
  • the bridge switching pieces 30 between the contact areas 31 double cranked.
  • a low-cost magnet arrangement is obtained in this way realized a comparatively high magnetic field strength in the region of the switching contacts.
  • the permanent magnetic arrangement Due to the effective Lorentz force, the permanent magnetic arrangement always causes the partial arcs resulting from the opening of the contacts to be moved in the direction of two of the four extinguishing devices 61, 62 and extinguished there, irrespective of the current direction.
  • the arrangement of the additional magnet 51 c directly in the region of the switching contacts allows the generation of a homogeneous magnetic field of high magnetic field strength, which allows due to its blowing rapid propagation of the arc in the direction of the respective extinguishing device 61, 62 and thus a comparatively short residence time of the arc between the Contact areas 11, 31 and 21, 31 result, which advantageously reduces the erosion of the contacts and the life of the switch is increased.
  • the permanent magnets 51a, 51b and 51c are preferably made of ferritic material and / or of rare earth materials such as Nd-Fe-B or Sa-Co and / or of materials which allow the formation of plastic-bonded moldings.
  • the switching chamber housing are preferably made of ceramic or thermosetting plastic and divided into four bays separated by bulkheads, each carrying on one outer exhaust openings.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
EP11190519.6A 2011-11-24 2011-11-24 Commutateur pour courant continu doté d'au moins une chambre de commutation Withdrawn EP2597666A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11190519.6A EP2597666A1 (fr) 2011-11-24 2011-11-24 Commutateur pour courant continu doté d'au moins une chambre de commutation
PCT/EP2012/073603 WO2013076303A1 (fr) 2011-11-24 2012-11-26 Commutateur pour fonctionnement en courant continu comportant au moins une chambre de commutation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11190519.6A EP2597666A1 (fr) 2011-11-24 2011-11-24 Commutateur pour courant continu doté d'au moins une chambre de commutation

Publications (1)

Publication Number Publication Date
EP2597666A1 true EP2597666A1 (fr) 2013-05-29

Family

ID=47222120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11190519.6A Withdrawn EP2597666A1 (fr) 2011-11-24 2011-11-24 Commutateur pour courant continu doté d'au moins une chambre de commutation

Country Status (2)

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EP (1) EP2597666A1 (fr)
WO (1) WO2013076303A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236628B (de) * 1961-05-17 1967-03-16 Bbc Brown Boveri & Cie Elektrischer Schalter, insbesondere Schuetz
DE1640804A1 (de) * 1966-04-09 1970-12-17 Licentia Gmbh Elektrisches Schaltgeraet
US20020060619A1 (en) * 2000-11-20 2002-05-23 Natarajan Mani Electronic actuation for mechanically held contactors
EP2061053A2 (fr) 2007-11-17 2009-05-20 Moeller GmbH Commutateur destiné à des applications à courant continu

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2463877A1 (fr) * 2010-12-07 2012-06-13 Eaton Industries GmbH Commutateur doté d'une chambre d'extinction
EP2463878A1 (fr) * 2010-12-07 2012-06-13 Eaton Industries GmbH Commutateur doté d'une chambre d'extinction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236628B (de) * 1961-05-17 1967-03-16 Bbc Brown Boveri & Cie Elektrischer Schalter, insbesondere Schuetz
DE1640804A1 (de) * 1966-04-09 1970-12-17 Licentia Gmbh Elektrisches Schaltgeraet
US20020060619A1 (en) * 2000-11-20 2002-05-23 Natarajan Mani Electronic actuation for mechanically held contactors
EP2061053A2 (fr) 2007-11-17 2009-05-20 Moeller GmbH Commutateur destiné à des applications à courant continu

Also Published As

Publication number Publication date
WO2013076303A1 (fr) 2013-05-30

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