EP2541574B1 - Disjoncteur électrique à double point de rupture - Google Patents

Disjoncteur électrique à double point de rupture Download PDF

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Publication number
EP2541574B1
EP2541574B1 EP12168863.4A EP12168863A EP2541574B1 EP 2541574 B1 EP2541574 B1 EP 2541574B1 EP 12168863 A EP12168863 A EP 12168863A EP 2541574 B1 EP2541574 B1 EP 2541574B1
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EP
European Patent Office
Prior art keywords
arc
contact
switch contact
switching
loop
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
EP12168863.4A
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German (de)
English (en)
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EP2541574A1 (fr
Inventor
Michael Neumeier
Gunther Eckert
Christoph Weber
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.)
Siemens AG
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Siemens AG
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Publication of EP2541574A1 publication Critical patent/EP2541574A1/fr
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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
    • H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • 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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7092—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by several arcing chambers in series

Definitions

  • the invention relates to a double-breaking protective switching device, in particular a circuit breaker or circuit breaker, for interrupting an electrical line in a low-voltage distribution network.
  • double interrupting circuit breakers or short double breaker, have a first switching contact and a second switching contact, which is electrically connected in series with the first switching contact on.
  • Each of the two switch contacts has a fixed contact and a relatively movable moving contact. Since the opening of the switch contacts in the energized state, an arc is formed, each of the two switching contacts associated with a so-called arc-quenching chamber to bring the arc as quickly as possible to extinguish.
  • the DE 198 10 981 A1 shows a switch with PTC element for improved current limitation and arc quenching.
  • An arc runner which directs a forming between a fixed contact and a moving contact arc to a splitter stack, is connected via a PTC conductor to the moving contact.
  • the arc run rail itself can be made of a PTC metal.
  • the PTC material experiences a temperature-induced increase in resistance when the arc is exceeded, which helps to extinguish the arc.
  • switches of the construction described above may be connected in series.
  • EP 1 548 772 A1 is a circuit breaker with double break is known, which has two spatially arranged side by side switching contacts with two associated, spatially juxtaposed extinguishing chambers.
  • the two moving contacts are combined to form a unit in the form of a contact bridge, so in that the current in the switched-on state flows from the input connection via the first fixed contact to the first moving contact, further via the contact bridge to the second moving contact and via the second fixed contact to the output connection.
  • the double-breaking protection switching device in particular a circuit breaker or circuit breaker, has a first switching contact and a second switching contact, which is arranged spatially next to the first switching contact and electrically connected in series with the first switching contact, wherein the first switching contact and the second switching contact in Operation of currents are flowed, which have the same direction.
  • the protective switching device has a first arc extinguishing chamber for extinguishing a first arc occurring when the first switching contact is opened, and a second arc extinguishing chamber for extinguishing a second arc occurring when the second switching contact is opened.
  • the protective switching device has a common blowing loop, which is arranged adjacent to the first switching contact and the second switching contact and electrically connected to them so that it is energized only when the first arc and / or the second arc is commutated to the Arcs in their associated arc-extinguishing chambers to drive.
  • the two juxtaposed switching contacts are traversed by currents which have the same direction.
  • the arcs resulting from the opening of the first and second switch contacts are rectified, ie they have the same direction of orientation.
  • the common Blasschleife which is assigned to the two switch contacts together, represents an additional active arc drive to drive the resulting in the case of opening the two switch contacts arcs in their respective associated arc-quenching chamber.
  • the blowing loop is electrically connected to the two switching contacts in such a way that it is energized only after commutation of the first, more rapid arc by its associated moving contact to a guide rail assigned to the relevant arc-extinguishing chamber.
  • This has the advantage that the Blasschleife is energized only then and thus only then an electromagnetic field is generated when it is needed to drive the arcs. Since the blown loop is not permanently energized, the power loss of the protective switching device can be significantly reduced.
  • the blowing loop required for this purpose can be made structurally simple, since the two arcs have the same orientation and should be driven in the same direction.
  • a deletion of the first arc (14) takes place independently of time of a deletion of the second arc (24).
  • the two arcs are independent of each other in the protective switching device according to the invention and can also commutate individually. The erase performance of the protection device is thereby significantly improved.
  • the blowing loop is electrically connected between a first guide rail of the first arc extinguishing chamber and a fixed contact of the second switching contact, so that the blown loop only at a Commutation of the first arc is energized on the first guide rail.
  • the blowing loop is thus electrically connected in series with the first guide rail and the fixed contact of the second switching contact. This represents an easy-to-implement possibility for electrical connection of the blown loop.
  • the blowing loop is arranged spatially between the first switching contact and the second switching contact. Due to the central placement of the blowing loop between the two switching contacts, a symmetrical arrangement is achieved which allows an approximate uniform distribution of the electromagnetic field generated by the energized blowing loop and acting on the two arcs.
  • the protective switching device has a further blowing loop for driving at least one of the two arcs.
  • a further blowing loop for driving at least one of the two arcs.
  • another blown loop can be used.
  • the central arrangement between the two switching contacts and other arrangements of the two blow loops are possible.
  • an improved switching performance thus an increased degree of freedom for the structural design of the protection device is achieved.
  • the further blower loop is permanently energized.
  • this Blasschleife already acts before the commutation of one of the two arcs on the respective associated guide rail, whereby the switching capacity of the protection device is further improved.
  • the first switching contact and the second switching contact are arranged spatially between the blowing loop and the further blowing loop. This can be done when using two blow loops as compact as possible arrangement of the individual components of the protection device can be achieved.
  • FIG. 1 is a circuit diagram of the double-breaking protective switching device 1 according to the invention shown schematically.
  • the double-breaking protective switching device 1 has a first switching contact 10 and a second switching contact 20, which are electrically connected in series with each other.
  • the protective switching device 1 has a short-circuit release 2, which is formed in the illustrated case as a short-circuit trip coil, and an overload trigger 3, which is shown here as a bimetallic strip, on.
  • the first switching contact 10 is assigned a first arc quenching chamber 13 for extinguishing a first arc 14.
  • the second switching contact 20 is associated with a second arc quenching chamber 23 for extinguishing a second arc 24.
  • the first switching contact 10 has a first fixed contact 11 and a movable relative to the first moving contact 12, which is mounted on a first moving contact carrier 16 on.
  • the second switching contact 20 has a second fixed contact 21 and a second movable contact 22 which is movable relative thereto and which is mounted on a second moving contact carrier 26.
  • the first fixed contact 11 is connected on the one hand via the short-circuit release 2 with an input terminal 4 of the protective switching device 1 electrically conductive. Via a first contact horn 18, the first fixed contact 11 is further electrically conductively connected to the first arc quenching chamber 13. Furthermore, the first moving contact 12 is electrically conductively connected via the first moving contact carrier 16 to the second fixed contact 21 of the second switching contact 20. The second fixed contact 21 is further electrically conductively connected via a second contact horn 28 to the second arc quenching chamber 23. The second moving contact 22 is via the second moving contact carrier 26 and the overload release 3 with an output terminal 5 of the protective switching device 1 electrically connected.
  • a switching mechanism (not shown) is unlatched, as a result of which the first switching contact 10 and the second switching contact 20 are opened via the mechanism.
  • a first arc 14-1 which initially burns between the first fixed contact 11 and the first moving contact 12
  • a second arc 24-1 which initially burns between the second fixed contact 21 and the second moving contact 22
  • the first moving contact 12 is moved away from the first fixed contact 11 by further pivotal movement of the first moving contact carrier 16
  • the first arc 14-1 commutates from the fixed contact 12 onto the first guide rail 15 which is electrically conductively connected to the first arc extinguishing chamber 13 is.
  • the first arc 14-2 now burns between the first fixed contact 11 and the first guide rail 15. Accordingly, the second arc 24 commutes in a further pivotal movement of the second Bewegutton carrier 26 from the second moving contact 22 on the second guide rail 25, which with the second arc Extinguishing chamber 23 is electrically connected.
  • the second arc 24-2 burns in the course between the second fixed contact 21 and the second guide rail 25th
  • a blowing loop 30 is electrically connected to the first switching contact 10 and the second switching contact 20 in such a way that it is energized only after the first arc 14 has been commutated onto the first guide rail 15.
  • the blowing loop 30 is electrically conductively connected with its first end to the first guide rail 15. With its second end, the blowing loop 30 is electrically conductively connected to the second fixed contact 21 of the second switching contact 20.
  • the Blasschleife 30 is executed in the simplest case as a simple conductor loop. However, if space permits inside the protective switching device 1, it is also possible to form the blowing loop 30 as a multi-turn coil.
  • FIGS. 2A and 2 B is the double-breaking protection device 1 shown schematically in two side views.
  • the first switching contact 10 and the second switching contact 20 are arranged lying one behind the other in this view and are separated by an insulating housing intermediate part 6 from each other.
  • the housing intermediate part 6 also has a cutout 7, in which in the fully assembled state, an actuating element (not shown) of the protective switching device 1 is added.
  • a first prechamber region of the protective switching device 1, in which the first switching contact 10 is arranged is shielded laterally outwardly by a first cover element 17.
  • a second cover member 27 is arranged such that it shields a second pre-chamber region of the protective switching device 1, in which the second switching contact 20 is arranged, to the other side to the outside.
  • FIG. 3 schematically shows a sectional view of the double interrupting protective switching device 1 along the section line CC in FIG. 2B ,
  • the protective switching device 1 is included shown at a time, since the two switching contacts 10 and 20 are opened, wherein the first arc 14 and the second arc 24 have already commutated.
  • the position of the blowing loop 30 between the two arcs 14 and 24 can be clearly seen.
  • the blowing loop 30 is energized.
  • the resulting electromagnetic field is in the field of Blasschleife 30, and the two arc-quenching chambers 13 and 23 by two in FIG. 3 from top to bottom extending field line arrows 31 shown.
  • the field lines 31 of the electromagnetic field are returned in arcuate paths around the Blasschleife 30 around. Since the first arc 14 and the second arc 24 have the same orientation direction, the electromagnetic field caused by the blowing loop 30 acts equally on both arcs: according to the "right-hand rule" for determining the direction of the Lorentz force on a current-carrying electrical conductor (here the arcs 14 and 24), the first arc 14 and the second arc 24 are urged toward their associated first and second arc quenching chambers 13 and 23. In this way, the blowing loop 30 contributes to the improvement of the erasing power and thus to the improvement of the switching capacity of the protective switching device 1.
  • FIGS. 4A and 4B the double-breaking protection device 1 is shown schematically in a perspective view.
  • the housing intermediate part 6 (see FIGS. 2A and 2 B ) was omitted for reasons of clarity.
  • the protective switching device 1 is shown at a time, since the first switching contact 10 and the second switching contact 20 are already open and the first arc 14-2 and the second arc 24-2 already from the respectively associated first fixed contact 12 and the second fixed contact 22nd are commutated to their respective associated first guide rail 15 and to the second guide rail 25.
  • the current flow in the interior of the protective switching device 1 is not interrupted, but is maintained by the first arc 14-2 and the second arc 24-2. Since the first switching contact 10 is already open and the first arc 14 has already commutated to the guide rail 15, the current flows, starting from the input terminal 4 of the protective switching device 1, via the short-circuit release 2 designed as a short-circuit release coil and a first fixed contact carrier 19. the current from the first fixed contact 11 does not flow to the first moving contact 12, but via the first contact horn 18 and the first arc 14-2 to the first guide rail 15.
  • the free end of the first guide rail 15 facing away from the first arc extinguishing chamber 13 is electrically conductive connected to a first end of the blowing loop 30.
  • a second end of the blowing loop 30 is electrically conductively connected to a carrier element 8 of the protective switching device. Accordingly, the electric current flows from the first guide rail 15 via the blowing loop 30 to the carrier element 8 connected to the second end of the blowing loop 30.
  • the carrier element 8 is integrally connected to a second fixed contact carrier 29. At a side facing away from the carrier element 8 end of the second fixed contact carrier 29 of the second fixed contact 21 and the second contact horn 28 are electrically connected to the second fixed contact carrier 29.
  • the second guide rail 25 is electrically conductively connected to the output terminal 5 of the protective switching device 1 at one of the second arc-quenching chamber 23 remote end.
  • the first switch contact 10 is electrically connected to the second switch contact 20 such that the first switch contact 10 and the second switch contact 20 are flowed through in a normal operating condition of streams having the same direction.
  • the first moving contact carrier 16 is electrically conductively connected to the carrier element 8 of the protective switching device 1 via a flexible strand 9-1. Since the first switching contact 10 and the second switching contact 20 are arranged symmetrically side by side, the electrically conductive connection of the first BewegWalletéess 16 with the second fixed contact carrier 29 causes a parallel orientation of the current flow through the first switching contact 10 and the second switching contact 20.
  • the second Bewegromelie 26 further connected via a further flexible wire 9-2 with the formed as a thermo-bimetal overload release 3 electrically conductive.
  • This current conduction makes it possible for the first switching contact 10 and the second switching contact 20 to flow in a normal operating state of currents which have the same direction, and nevertheless to arrange the two switching contacts 10 and 20 in an identical manner next to one another.
  • the two BewegCountways 16 and 26 are not directly electrically connected to each other, so it is still possible, the two BewegCountways 16 and 26 by means of a common Switching mechanism (not shown) to operate together.
  • the two moving contact carriers 16 and 26 have a common pivot axis and correspondingly arranged receiving openings for coupling the common switching mechanism.

Claims (7)

  1. Disjoncteur de protection à double coupure (1), en particulier disjoncteur de protection de ligne ou disjoncteur de puissance, comportant :
    - un premier contact de commutation (10) ;
    - un deuxième contact de commutation (20) qui est agencé à côté du premier contact de commutation (10) dans l'espace et qui est monté en série électrique avec le premier contact de commutation (10), le premier contact de commutation (10) et le deuxième contact de commutation (20) étant, en service, traversés par des courants de même sens ;
    - une première chambre d'extinction d'arc (13) pour éteindre un premier arc (14) qui apparaît à l'ouverture du premier contact de commutation (10) ;
    - une deuxième chambre d'extinction à arc (23) pour éteindre un deuxième arc (24) qui apparaît à l'ouverture du deuxième contact de commutation (20), la première chambre d'extinction d'arc (13) et la deuxième chambre d'extinction d'arc (23) étant agencées côte à côte dans l'espace, caractérisé par :
    - une boucle de soufflage commune (30) qui est agencée de manière à être voisine du premier contact de commutation (10) et du deuxième contact de commutation (20) et qui est câblée électriquement avec ceux-ci de manière telle qu'elle n'est sous courant que si le premier arc (14) et/ou le deuxième arc (24) sont commutés pour diriger les arcs (14, 24) vers les chambres d'extinction d'arcs (13, 23) qui leur sont associées.
  2. Disjoncteur de protection (1) selon la revendication 1, selon lequel une extinction du premier arc (14) se produit indépendamment dans le temps d'une extinction du deuxième arc (24).
  3. Disjoncteur de protection (1) selon l'une des revendications précédentes, selon lequel la boucle de soufflage (30) est montée électriquement entre un premier rail conducteur (15) de la première chambre d'extinction d'arc (13) et un contact fixe du deuxième contact de commutation (20) de manière telle que la boucle de soufflage n'est sous courant qu'à une commutation du premier arc (14) sur le premier rail conducteur (15).
  4. Disjoncteur de protection (1) selon l'une des revendications précédentes, selon lequel la boucle de soufflage (30) est agencée dans l'espace entre le premier contact de commutation (10) et le deuxième contact de commutation (20).
  5. Disjoncteur de protection (1) selon l'une des revendications précédentes, lequel comporte une autre boucle de soufflage pour entraîner au moins l'un des deux arcs (14, 24).
  6. Disjoncteur de protection (1) selon la revendication 4, l'autre boucle de soufflage étant durablement sous courant.
  7. Disjoncteur de protection (1) selon la revendication 4, le premier contact de commutation (10) et le deuxième contact de commutation (20) étant agencés dans l'espace entre la boucle de soufflage (30) et l'autre boucle de soufflage.
EP12168863.4A 2011-07-01 2012-05-22 Disjoncteur électrique à double point de rupture Active EP2541574B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011078524A DE102011078524A1 (de) 2011-07-01 2011-07-01 Doppeltunterbrechendes Schutzschaltgerät

Publications (2)

Publication Number Publication Date
EP2541574A1 EP2541574A1 (fr) 2013-01-02
EP2541574B1 true EP2541574B1 (fr) 2015-09-16

Family

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Application Number Title Priority Date Filing Date
EP12168863.4A Active EP2541574B1 (fr) 2011-07-01 2012-05-22 Disjoncteur électrique à double point de rupture

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Country Link
EP (1) EP2541574B1 (fr)
CN (1) CN102856135B (fr)
DE (1) DE102011078524A1 (fr)
IN (1) IN2012DE01716A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3948916A4 (fr) * 2019-04-05 2023-05-10 Blixt Tech Ab Disjoncteur pour coupure de circuit électrique
CN112382550A (zh) * 2020-11-30 2021-02-19 周义才 一种双灭弧室磁力吹弧断路器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1257933B (de) * 1964-03-20 1968-01-04 Bbc Brown Boveri & Cie Elektrischer Leistungsschalter
US4810841A (en) * 1986-07-31 1989-03-07 Siemens Aktiengesellschaft Current-limiting switching element
EP0649155B1 (fr) * 1993-10-15 1997-04-02 Hager Electro S.A. TÔle de conduction double pour chambre de conduction d'arc de disjoncteur
DE19810981A1 (de) * 1998-03-13 1999-09-16 Abb Research Ltd Schalter mit PTC-Element zur verbesserten Strombegrenzung und Lichtbogenlöschung
IT1325891B (it) * 2001-06-22 2004-12-30 Abb Service Srl Polo interruttore miniaturizzato
DE10352934B4 (de) * 2003-11-11 2005-12-22 Siemens Ag Lichtbogen-Löschvorrichtung
EP1548772A1 (fr) 2003-12-22 2005-06-29 ABB Schweiz Holding AG Chambre de soufflage pour un disjoncteur-protecteur possèdant une double coupure
EP1615246A1 (fr) * 2004-07-05 2006-01-11 ABB Schweiz AG Dispositif d'extinction d'arc pour un disjoncteur

Also Published As

Publication number Publication date
CN102856135B (zh) 2017-05-03
EP2541574A1 (fr) 2013-01-02
DE102011078524A1 (de) 2013-01-03
CN102856135A (zh) 2013-01-02
IN2012DE01716A (fr) 2015-09-25

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