EP2786389B1 - Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation - Google Patents

Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation Download PDF

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Publication number
EP2786389B1
EP2786389B1 EP12794315.7A EP12794315A EP2786389B1 EP 2786389 B1 EP2786389 B1 EP 2786389B1 EP 12794315 A EP12794315 A EP 12794315A EP 2786389 B1 EP2786389 B1 EP 2786389B1
Authority
EP
European Patent Office
Prior art keywords
switching
permanent magnet
arrangement
contact
arc
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
EP12794315.7A
Other languages
German (de)
English (en)
Other versions
EP2786389A1 (fr
Inventor
Klaus Dauer
Anke Juelich
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 PL12794315T priority Critical patent/PL2786389T3/pl
Priority to EP12794315.7A priority patent/EP2786389B1/fr
Publication of EP2786389A1 publication Critical patent/EP2786389A1/fr
Application granted granted Critical
Publication of EP2786389B1 publication Critical patent/EP2786389B1/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
    • 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
    • H01H9/32—Insulating body insertable between contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for 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
    • H01H9/44—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

Definitions

  • the invention relates to a permanent magnet arrangement for an arc runner arrangement of an electrical switching device with a permanent magnet and a cover made of electrically insulating material.
  • the invention further relates to a switching device for DC application with at least one current path, at least one switching contact arrangement for interrupting the current path, wherein the switching contact arrangement is arranged in a switching chamber of a housing of the switching device, and with an arc runner arrangement, which is arranged in the switching chamber and at least in the region Switching contact arrangement of the respective current path generates a magnetic field.
  • Permanent magnet arrangements and switching devices of the type mentioned are from the EP 2 061 053 A2 known.
  • To provide a switching device for DC applications there is proposed to use the housing of a switching device for AC applications, in addition permanent magnets are provided which have a magnetic field with substantially transverse to a separation path of the current paths field lines.
  • In the housing three receiving areas are provided for each one flow path, wherein each current path is associated with a movable switching contact element and two opposing fixed switching contact elements.
  • the three movable switching contact elements are in this case jointly movable between a closed position, which corresponds to the switched-on state of the switching device, and an open position, which corresponds to the switched-off state switching device.
  • each current path has two separating sections which, when the movable switching contact elements are open, extend between the two Form ends and the first and second fixed switching contact elements associated with these ends. When the switching contact elements are opened, an arc forms along the separating sections, which arc can be extinguished with the aid of one of the arc-extinguishing devices.
  • DC applications since erasure of an arc can not be achieved due to current zero crossing, as in AC applications, DC applications require the provision of a magnetic field which drives the arc into one of the arc quenching devices.
  • This magnetic field is formed per current path by two permanent magnet arrangements, whereby a magnetic field is established with field lines in an orientation which run transversely to the separation paths and generate a Lorenz force on arcs along these separation paths which drives the arcs in the direction of the arc extinguishing devices.
  • the arc quenching devices each comprise two permanent magnet arrangements. These each include a permanent magnet and a receiving space in the housing of the switching device. The receiving spaces are assigned to the separating sections and arranged on both sides of these separating sections so that they receive them between them. In the receiving spaces, the permanent magnets are inserted and recorded. Here, the permanent magnets are almost completely enclosed by the walls of the receiving spaces and received by this electrically isolated.
  • FIG DE-A-10132858 Another example of a switch apparatus with a permanent magnet arc runner assembly is shown in FIG DE-A-10132858 disclosed.
  • Object of the present invention is to provide a permanent magnet arrangement, in which a rollover of an arc on the permanent magnet and thus a burn of the permanent magnet is prevented as possible.
  • a switching device according to claim 1.
  • the permanent magnet can be provided with the cover before insertion into the receiving chamber and can be provided as a prefabricated unit. In this case, the cover detachable or insoluble, z. B. cohesively, be connected to the permanent magnet.
  • the arc driver assembly may be designed differently. For example, it can be provided that two permanent magnet arrangements are provided, as explained above, between which the switch contact arrangement is arranged. However, it is also conceivable that only one permanent magnet arrangement is provided, which is connected to two parallel pole plates, wherein the permanent magnet is arranged above the switching contact arrangement and the pole plates receive the switching contact arrangement between them.
  • the permanent magnet arrangement can be accommodated in a receiving chamber of the housing of the switching device and protrude exclusively with the cover from the receiving chamber.
  • the housing forms part of the electrical insulation.
  • the protruding from the receiving chamber part of the permanent magnet is electrically insulated by the cover, so that an arc of an arc on the permanent magnet is prevented.
  • the receiving chamber may in this case be introduced into a wall of the housing.
  • the wall is made of an electrically insulating and magnetically permeable material, for example of a thermoset or temperature-resistant thermoplastic or ceramic. From the same material and the cover can be made.
  • the permanent magnet arrangement can have a coding projection, which is provided, for example, on the permanent magnet, with which the permanent magnet arrangement dips into a coding recess of the receiving chamber.
  • the permanent magnet is basically inserted in the correct magnetic orientation into the receiving chamber to ensure that an arc in the right direction, i. H. into a fire extinguishing device.
  • the receiving chamber is designed such that the Kodiervorsprung can not dip into the KodierausNeillung and the permanent magnet assembly further protrudes from the receiving chamber, as is the case, when the permanent magnet assembly is correctly inserted.
  • z. B. a cover or other components of the switching device can not be mounted when the permanent magnet assembly is inserted incorrectly by the other components abut against the permanent magnet assembly and prevents mounting of the other components.
  • FIG. 1 shows the switching device 1 according to the invention in a partial longitudinal section with a housing 2, which comprises a lower part 3 and an upper part 4.
  • FIG. 2 shows a view into the switching device 1, wherein the upper part 4 is omitted so that you can look into the lower part 3.
  • the two Figures 1 and 2 will be described together below.
  • the switching device 1 has three poles, d. H. three switching paths, namely a first switching path 5, a second switching path 6 and a third switching path 7.
  • Each switching path 5, 6, 7 is arranged in a separate switching chamber, namely a first switching chamber 8, a second switching chamber 9 and a third switching chamber 10.
  • the switching chambers 8, 9, 10 are electrically separated from each other by partitions 11, 12 of the housing 2, wherein the intermediate walls 11, 12 are preferably magnetically permeable.
  • the three current paths 5, 6, 7 are identical in terms of their structure, wherein the structure of the current paths 5, 6, 7 is explained in more detail by way of example with reference to the middle second current path 6 in the following.
  • the second flow path 6 within the second switching chamber 9 is in FIG. 1 shown in longitudinal section.
  • the second switching path 6 is formed twice interrupting and has a first switching contact arrangement 13 and a second switching contact arrangement 16.
  • the two switch contact arrangements 13, 16 are identical and mirror images of each other.
  • the first switching contact arrangement 13, which in FIG. 1 is shown on the left side, comprises a contact pair with a first contact 14 and a second contact 15. Accordingly, the second switching contact arrangement 16 with a second contact pair comprising a first contact 17 and a second contact 18 is formed.
  • the first contact 14 of the first switching contact arrangement 13 is arranged on a first fixed contact carrier 19.
  • the first fixed contact carrier 19 is fixed and thus arranged immovably in the housing 2 of the switching device 1.
  • the first contact 14 is arranged at a first free end of the first fixed contact carrier 19. At a this end facing away from the end of the first fixed contact carrier 19, a first terminal 23 is provided for the connection of the first current path 5 in a DC circuit.
  • the second contact 15 of the first switch contact arrangement 13 is located on a bridge contact piece 20 of a bridge arrangement 21 and is movably arranged in the housing 2.
  • the bridge contact piece 20 is in the in FIG. 1 Oriented orientation vertically adjustable between a raised and a lowered position. In the raised position, the second contact 15 of the first switch contact arrangement 13 is in contact with the first contact 14. In a lowered position, the two contacts 14, 15 are out of contact. In this position, an isolating distance is formed between the first contact 14 and the second contact 15, along which an arc can form.
  • the second switching contact arrangement 16 is identical to the first switching contact arrangement 13.
  • the first contact 17 of the second switching contact arrangement 16 is located on a second fixed contact carrier 22 and is arranged at a first end of the second fixed contact carrier 22. At a this end remote from the end of the second fixed contact carrier 22, a second terminal 24 is provided.
  • the second contact 18 of the second switching contact arrangement 16 is likewise arranged on the bridge contact piece 20, specifically on an end remote from the second contact 15 of the first switching contact arrangement 13.
  • the bridge switching piece 20 is electrically conductive and connects the two second contacts 15, 18 electrically to each other.
  • the second contact 18 of the second switching arrangement 16 is in contact with the first contact 17, wherein in the lowered position of the bridge switching piece 20, the two contacts 17, 18 are kept out of contact and forms an insulating gap between them, along which can also form an arc.
  • a current can thus flow from the first terminal 23 via the first fixed contact carrier 19 to the first contact of the first switching contact arrangement 13, then on to the second contact 15 of the first switching contact arrangement 13 via the bridge contact piece 20 to the second contact 18 of the second switching contact arrangement 16 , From there, the current continues to flow to the first contact 17 of the second switching contact arrangement 16 via the second fixed contact carrier 22 to the second connection 24.
  • a switching bridge 30 is provided, which is arranged vertically displaceable in the housing 2 and the bridge switching piece 20 adjusted.
  • the bridge switching piece 20 is pressed with its second contacts 15, 18 via a spring 31 against the first contacts 14, 17, wherein the spring 31 between the bridge contact piece 20 and the switching bridge 30 is supported.
  • two erasing devices namely a first erasing device 27 and a second erasing device 28 are provided.
  • the first erasing device 27 is assigned to the first switching contact arrangement 13 and the second erasing device 28 to the second switching contact arrangement 16.
  • the two erasing devices 27, 28 are each arranged on a side of the respective switching contact arrangement 13, 16 facing away from the switching bridge arrangement 21.
  • the first arc runner arrangement 32 comprises two first permanent magnet arrangements 25, which are arranged in the second switching chamber 9 and receive the first switching contact arrangement 13 between them.
  • the first permanent magnet arrangements 25 are arranged parallel to the intermediate walls 11, 12.
  • the two first permanent magnets 25 are arranged rectified with respect to their magnetization, so that forms an approximately homogeneous magnetic field with field lines transverse to the separation direction between them.
  • the field lines of the magnetic field also extend transversely to an arc, which forms between the first contact 14 and the second contact 15 of the first switching contact arrangement 13.
  • a Lorenz force is generated by the magnetic field, which acts on the arc and drives it in the direction of the first extinguishing device 27.
  • the second arc driver assembly 33 is constructed similar to the first arc driver assembly 32 and includes two second permanent magnet assemblies 26 sandwiching the second switch contact assembly 16.
  • the magnetic field may be aligned in the same direction as that of the first permanent magnet arrangements 25.
  • An arc, which is formed between the first contact 17 and the second contact 18 of the second switching contact arrangement 16, has a current direction, which is spatially opposite to the current direction of an arc between the contacts 14, 15 of the first switching contact arrangement 13. If an arc as shown in FIG. 1 between the contacts 17, 18 of the second switching contact arrangement 16 has a current direction vertically downward, an arc between the contacts 14, 15 of the first switching contact arrangement, a current direction vertically upwards.
  • the magnetic fields of the two arc drive assemblies 32, 33 may be oppositely oriented, so that in one direction of the first arc, the arc at the first switching contact arrangement 13 and in a second direction opposite to the first current direction, the arc at the second Switching contact arrangement 16 is deleted.
  • the first flow path 5 and the third flow path 7 as well as the first switching chamber 8 and the third switching chamber 10 are identical to the second flow path 6 and the second switching chamber 9, but with the difference that in the first switching chamber 8 and the third switching chamber 10 no arc drive arrangements are arranged. In the first switching chamber 8 and in the third switching chamber 10 thus no permanent magnet arrays are arranged.
  • the arc runner arrangements 32, 33 of the first current path 6 radiate to the adjacent switching chambers, namely the first switching chamber 8 and the third switching chamber 10, in order to be able to exert a Lorentz force on a developing arc there as well.
  • the first switching chamber 8 and / or the third switching chamber 10 may be provided with arc bus driver arrangements.
  • the first permanent magnet arrangement 25 is shown in detail.
  • the remaining permanent magnet arrangements are constructed identically.
  • the first permanent magnet arrangement 25 comprises a permanent magnet 34, which is designed plate-shaped.
  • a cover 35 made of an electrically insulating material is attached directly to the permanent magnet 34.
  • the permanent magnet 34 fastening projections 36, which dip into a mounting recess 37 of the cover 35.
  • the cover 35 may be releasably connected to the permanent magnet 34 via adhesion or firmly via material bond, for example via a bond.
  • FIG. 2 shows that in the switching chambers 8, 9, 10 receiving chambers 38 are provided.
  • a receiving chamber 38 in the second switching chamber 9 is explained in more detail below.
  • the receiving chamber 38 is disposed on one of the intermediate walls 11, wherein the intermediate wall 11 also simultaneously represents a wall of the receiving chamber 38.
  • the receiving chamber 38 comprises a parallel to the intermediate wall 11 extending inner wall 39 and the intermediate wall 11 and the inner wall 39 connecting side walls 40, 41, so that in FIG. 1 upwardly open receiving chamber 38 is formed. This is also closed at the bottom by a bottom wall 42 of the housing 2.
  • the permanent magnet 34 with attached cover 35 is inserted into the receiving chamber 38 from above, with only the cover 35 from the receiving chamber 38 projects upwards. Since all walls 12, 39, 40, 41 of the receiving chamber 38 are made of an electrically insulating material, skipping an arc on the permanent magnet 34 is effectively prevented.
  • the permanent magnet 34 On a side facing away from the cover 35, the permanent magnet 34 has a coding projection 44, with which this dips into a KodierausEnglishung 43 of the receiving chamber 38. Since the coding projection 44 and the coding recess 43 are arranged laterally offset from an axis of symmetry, the permanent magnet 34 can be used only in one of its magnetic orientations. This avoids that a wrong magnetic field is built up.
  • the cover 35 has upwardly facing stop projections 45.
  • the coding projection 44 can not be immersed in the coding recess 43, so that the permanent magnet 34 protrudes farther from the receiving chamber 38 than when properly inserted.
  • the fixed contact carrier 19 can not be mounted, since this abuts against the stop projections 45. A wrong assembly is thus safely avoided.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (6)

  1. Appareil de commutation pour applications en courant continu, comprenant :
    - au moins une piste de courant (5, 6, 7),
    - au moins un dispositif de contact de commutation (13, 16) pour interrompre l'au moins une piste de courant (5, 6, 7), le dispositif de contact de commutation (13, 16) étant agencé dans une chambre de commutation (8, 9, 10) d'un boîtier (2) de l'appareil de commutation (1), ainsi que
    - un dispositif d'attaque à arc électrique (32, 33), qui est agencé dans la chambre de commutation (8, 9, 10) et qui produit un champ magnétique au moins dans la zone du dispositif de contact de commutation (13, 16) de la piste de courant respective (5, 6, 7),
    dans lequel le dispositif d'attaque à arc électrique (32, 33) comporte au moins un dispositif à aimant permanent (25, 26) avec un aimant permanent (34) et avec un couvercle (35) en un matériau électriquement isolant,
    caractérisé en ce que le couvercle (35) est fixé directement à une extrémité de l'aimant permanent (34), le dispositif à aimant permanent (25, 26) étant logé dans une chambre de logement (38) du boîtier (2) et dépassant hors de celui-ci seulement avec le couvercle (35).
  2. Appareil de commutation selon la revendication 1, caractérisé en ce que le dispositif d'attaque à arc électrique (32, 33) comprend deux dispositifs à aimant permanent (25, 26) entre lesquels est agencé le dispositif de contact de commutation (13, 16).
  3. Appareil de commutation selon l'une des revendications précédentes, caractérisé en ce que la chambre de logement (38) est placée dans une paroi (11, 12) du boîtier (1).
  4. Appareil de commutation selon la revendication 3, caractérisé en ce que la paroi (11, 12) est fabriquée en un matériau isolant du point de vue électrique et perméable du point de vue magnétique.
  5. Appareil de commutation selon l'une des revendications précédentes, caractérisé en ce que le dispositif à aimant permanent (25, 26) comporte une saillie de codage (44) avec laquelle le dispositif à aimant permanent (25, 26) plonge dans un évidement de codage (43) de la chambre de logement (38).
  6. Appareil de commutation selon l'une des revendications précédentes, caractérisé en ce que le couvercle (35) est fabriqué en un matériau isolant du point de vue électrique et perméable du point de vue magnétique.
EP12794315.7A 2011-11-29 2012-11-28 Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation Active EP2786389B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL12794315T PL2786389T3 (pl) 2011-11-29 2012-11-28 Układ magnesu trwałego do układu prowadzenia łuku elektrycznego i łącznik
EP12794315.7A EP2786389B1 (fr) 2011-11-29 2012-11-28 Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11191220.0A EP2631928A1 (fr) 2011-11-29 2011-11-29 Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation
PCT/EP2012/073797 WO2013079511A1 (fr) 2011-11-29 2012-11-28 Système d'aimant permanent pour un système de commande d'arc électrique et appareil de commutation
EP12794315.7A EP2786389B1 (fr) 2011-11-29 2012-11-28 Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation

Publications (2)

Publication Number Publication Date
EP2786389A1 EP2786389A1 (fr) 2014-10-08
EP2786389B1 true EP2786389B1 (fr) 2017-08-30

Family

ID=47263355

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11191220.0A Withdrawn EP2631928A1 (fr) 2011-11-29 2011-11-29 Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation
EP12794315.7A Active EP2786389B1 (fr) 2011-11-29 2012-11-28 Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11191220.0A Withdrawn EP2631928A1 (fr) 2011-11-29 2011-11-29 Système d'aimant permanent pour un circuit d'attaque à arc lumineux et appareil de commutation

Country Status (4)

Country Link
US (1) US10290439B2 (fr)
EP (2) EP2631928A1 (fr)
PL (1) PL2786389T3 (fr)
WO (1) WO2013079511A1 (fr)

Families Citing this family (3)

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US9690119B2 (en) 2015-05-15 2017-06-27 Vertical Optics, LLC Wearable vision redirecting devices
IL244255A (en) 2016-02-23 2017-04-30 Vertical Optics Llc Wearable devices for deflecting vision
DE102020104258B4 (de) * 2020-02-18 2022-09-29 Schaltbau Gmbh Schaltgerät mit zumindest zwei miteinander kommunizierenden Löschbereichen

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Also Published As

Publication number Publication date
WO2013079511A1 (fr) 2013-06-06
EP2631928A1 (fr) 2013-08-28
EP2786389A1 (fr) 2014-10-08
US10290439B2 (en) 2019-05-14
US20150048911A1 (en) 2015-02-19
PL2786389T3 (pl) 2018-01-31

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