EP1548773B1 - Chambre de soufflage pour un disjoncteur-protecteur possédant une double coupure - Google Patents

Chambre de soufflage pour un disjoncteur-protecteur possédant une double coupure Download PDF

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Publication number
EP1548773B1
EP1548773B1 EP03405921A EP03405921A EP1548773B1 EP 1548773 B1 EP1548773 B1 EP 1548773B1 EP 03405921 A EP03405921 A EP 03405921A EP 03405921 A EP03405921 A EP 03405921A EP 1548773 B1 EP1548773 B1 EP 1548773B1
Authority
EP
European Patent Office
Prior art keywords
arc
link
quenching device
contact
quenching
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.)
Expired - Lifetime
Application number
EP03405921A
Other languages
German (de)
English (en)
Other versions
EP1548773A1 (fr
Inventor
Gerhard Schneider
Siegfried Mayer
Norbert Papok
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to DE50309487T priority Critical patent/DE50309487D1/de
Priority to AT03405921T priority patent/ATE390700T1/de
Priority to EP03405921A priority patent/EP1548773B1/fr
Priority to ES03405921T priority patent/ES2302908T3/es
Priority to US11/007,213 priority patent/US7081596B2/en
Publication of EP1548773A1 publication Critical patent/EP1548773A1/fr
Application granted granted Critical
Publication of EP1548773B1 publication Critical patent/EP1548773B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing 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

Definitions

  • the present invention relates to the field of power switches for low voltage distribution networks. It relates to an arc quenching device for circuit breaker with double break according to the preamble of claim 1.
  • installation circuit-breakers are used to rapidly and reliably protect low-voltage lines, motors, equipment, and equipment from the effects of overload and short-circuit currents. They generally have a thermal release with a bimetal and an electromagnetic release with a coil and a percussion anchor and preferably a contact arrangement with double interruption.
  • a normal circuit breaker has a contact point, which is formed of a fixed and a movable contact piece.
  • the contact point is located in a so-called prechamber, to which a quenching chamber with an arc splitter stack connects.
  • the foot points of the arc are passed from the fixed contact piece and the movable contact piece via arc guide rails to the arc splitter stack.
  • the arc widens immediately after the contact opening, and the inlet velocity of the arc in the Arc splitter stack is dependent on the so-called own blowing, ie the generated by the arc itself magnetic blowing field, the pressure conditions in the arc, the shape of the guide rails and the choice of contact material.
  • Object of the present invention is to optimize the acceleration of the two generated by a shutdown movement of a switching contact targeted at a circuit breaker with double break. This object is achieved by an arc quenching device having the features of patent claim 1 and a circuit breaker having the features of claim 10. Advantageous embodiments will become apparent from the dependent claims.
  • the core of the invention is to reinforce by a suitable magnetic jacket, the magnetic fields in the arc and thus acting on the arc and this driving in the direction of the arc splitter Lorentz force.
  • the arc moves faster, the contact erosion is reduced and the turn-off increased horreptively.
  • the inventive separate magnetic jacket need the arc guide itself have no magnetic properties and thus can be made of non-magnetic, the arc movement favoring copper.
  • the magnetic jacket for example, made of steel is realized by a one-piece, one-sided open U-profile mold is slipped over a bridge-side arc run rail that the arc chamber or the antechamber is completed on three sides by the molding.
  • the magnetic field acting on the arc of the current flowing in the arc run-off current, i. the so-called own blowing, is thereby reinforced.
  • such a molded part can be easily manufactured and attached to the arc running rail during the assembly process.
  • a blown loop is inserted into a current flow only during the shutdown of the circuit breaker and the two arc arc extinguishing circuit.
  • the latter is arranged in sections parallel to an arc track and is traversed by a current which points in the same direction as the turn-off in the adjacent arc guide.
  • the U-shaped magnetic jacket preferably also surrounds or surrounds this running-rail-parallel blow-loop section.
  • the blower loop is geometrically or materially equipped with current-limiting properties. Since the blown loop in nominal operation, i. When the switch contact is closed, no current is supplied, this does not affect the intrinsic impedance of the switch and, due to its low initial or cold resistance of a few m ⁇ , does not hinder the commutation of the arc to the corresponding arc runners. After the commutation of both arcs, the blown loop is also current-flowed, as a result of which its impedance increases and limits the cut-off current.
  • the blower loop is formed so that both arcs are favored to a similar extent, for example, by a respect to the extinguishing chamber partition symmetrical design of the blower loop or by two electrically connected in parallel, each associated with an arc blowing loops.
  • each arc or two atria associated with a separate magnetic sheath which also serves as a magnetic shield of the arc chamber with respect to the prevailing in the other arcing space magnetic fields.
  • the U-shaped magnetic jacket is separated from the actual arc chamber by a prechamber insulation of, for example Plexiglas. This prevents a flashover of the arc on the possibly metallic jacket.
  • the insulation may have outgassing properties, i. Remove arc-extinguishing gases.
  • the pre-chamber insulation preferably has a bulge projecting into the arc region for reducing the prechamber volume.
  • the reduced volume counteracts a pressure loss of the gases in the arc region and prevents the arc from broadening.
  • the foot points of the arc remain compact and thereby heat the arc guide rails, which is conducive to movement of the arc.
  • the bulge preferably has a V-shaped profile, which opens in the direction of the quenching chamber and approximately follows the contour of the guide rails. This ensures that the two arc-root points move at the same speed and that the arc expands before its entry into the quenching chamber over its maximum length determined by the distance between the arc guide rails. Thus, all quenching plates are equally involved in the division and extinction of the arc.
  • Fig.1 shows in oblique view a section of a single or multi-pole circuit breaker with two series-connected switching contacts per pole.
  • a first terminal 10 leads via the coil of a short-circuit current release 100 and a first connection conductor 11 to a first fixed contact 21. This is in the closed switch position (not shown) in electrical contact with a first bridge contact 31 of a movable fork-shaped contact bridge 3.
  • a second bridge contact 32 of Contact bridge 3 is in the closed switch position in contact with a second fixed contact 22, which leads via a second connecting conductor 12 on to an overcurrent release, not shown, and to a second terminal.
  • Both switching points formed by a fixed and bridge contact each have a first or second prechamber 41, 42 assigned to it.
  • FIG.2 In another perspective, a detail of the first pre-chamber 41 is shown, wherein the splitter stack has been omitted between the widened ends of the two first arc guide rails 51,61.
  • the inventive magnetic jacket 91 with U-shaped cross-section which consists of a magnetically active Material such as iron or steel is preferably prepared as a one-piece shielding plate, is arranged so that it closes the arc space, which is defined between the first arc guide rails 51,61, laterally.
  • a back 911 of the shell is located along the first bridge-side arc guide rail 61, while the side surfaces 912 of the shell extend toward the first connection-side arc guide rail 51.
  • the magnetic jacket 91 bundles the arc magnetic field and drives the arc in the direction of the extinguishing chambers.
  • each of the two prechambers 41, 42 is assigned a separate magnetic jacket 91, 92.
  • the arc region between the two arc guide rails 51, 61; 52.61 magnetic with respect to the outside space and in particular with respect to the other prechamber 42; 41 shielded.
  • a first blower loop 81 is provided between the first bridge-side running rail 61 and the second bridge-side running rail 62. In the event of tripping, the cut-off current flows from the first to the second arc through this first blower loop 81.
  • It comprises at least one Lorentz section located inside the jacket 91, which is arranged geometrically parallel to the first bridge-side arc runner 61 and in which the current flow direction is the same as in the adjacent arc runner 61 As a result, the electromagnetic Lorentz force on the first arc, which moves it in the direction of the first splitter stack 71, amplified.
  • the blower loop 81 is preferably equipped with turn-off current limiting properties.
  • a current-limiting behavior can be achieved, for example, by the selection of materials, all conductors with an electrical resistance in question, which increases with increasing current, and including in particular the known as PTC resistor or positive temperature coefficient (PTC) resistance metallic alloys based on Ni, Co, Fe, such as NiCr, NiMn, NiFe, NiCrMn, NiCo, NiCoFe, CoFe, CrAlFe, or ceramic materials.
  • PTC resistor or positive temperature coefficient (PTC) resistance metallic alloys based on Ni, Co, Fe, such as NiCr, NiMn, NiFe, NiCrMn, NiCo, NiCoFe, CoFe, CrAlFe, or ceramic materials.
  • PTC thermistor is based on a polymer composite whose polymer matrix is filled with a mixture of carbon, a metal such as Ni, and a boride, silicide, oxide or carbide such as TiC 2 , TiB 2 , MoSi 2 , V 2 O 3 . It is important that the initial or cold resistance is not too high and the commutation of the Arcs on the bridge-side rails 61,62 and the concomitant training of the arc extinguishing circuit is not hindered.
  • FIG 3 a section through the first pre-chamber 41 is shown, whereby from the first magnetic shell 91 only the sectional area of its back 911 is visible.
  • the arc running properties are highly dependent on the contour of the arc guide rails 51,61. Due to the apparent narrowing between the upper and lower guide rail over a large part of the antechamber, the arc is optimally accelerated. Since the magnetic suction effect by the quenching plates 71 of magnetic material is already effective in the widening of the guide rails 51,61, a persistence of the arc is prevented on the arc guide rails and allows instantaneous shrinkage of the same.
  • a pre-chamber insulation 411 which has substantially the same cross section as the jacket 91 and this isolated from the arc region.
  • a pre-chamber insulation as an injection molded part is suitably introduced into the jacket or placed over the guide rails prior to assembly of the jacket.
  • An indentation 412 within the prechamber insulation directs the ionized gases onto the guardrails, which are heated by the gases and thus allow the arc root to run.
  • the bulge 412 reduces the distance perpendicular to the cutting plane of the Figure 3 between the side surfaces of the insulation, ie the clear width of the arc chamber, by 30 to 50%.
  • the bulge according to Figure 3 has the shape of an elongated elevation, which opens in a V-like direction towards the splitter stack 71 out.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (10)

  1. Dispositif d'extinction d'arc pour disjoncteurs de protection à double coupure, comprenant
    - deux contacts fixes (21, 22), susceptibles d'être raccordés sur des bornes d'alimentation du disjoncteur de protection et d'être mis en contact par deux contacts à pont (31, 32) d'un pont de contact mobile (3),
    - deux préchambres (41,42) séparées par une paroi de séparation, avec chacune deux coulisses de guidage d'arc (51, 61 ; 52, 62), parmi lesquelles une coulisse de guidage d'arc côté raccordement (51,52) est reliée à un contact fixe (21, 22) et une coulisse de guidage d'arc côté pont (61, 62) est conçue pour reprendre un arc électrique à partir du pont de contact (3), et
    - deux chambres d'extinction d'arc se raccordant sur les préchambres, avec chacune un pack de tôles d'extinction d'arc (71,72), qui est relié avec les coulisses de guidage d'arc (51, 61 ; 52, 62),
    caractérisé en ce qu'une enveloppe magnétique (91) est prévue pour amplifier les forces magnétiques agissant sur un arc électrique formé entre la première coulisse de guidage d'arc côté raccordement et la première coulisse de guidage d'arc côté pont (51, 61) et en ce que ladite enveloppe magnétique (91) est une pièce moulée avec un dos (911) et deux surfaces latérales parallèles (912), formant un profil en forme de U, le dos (911) venant se situer entre la première coulisse de guidage d'arc côté pont (61) et les surfaces latérales (912) montrant en direction de la coulisse de guidage d'arc côté raccordement (51).
  2. Dispositif d'extinction d'arc selon la revendication 1, caractérisé en ce que la pièce moulée est monobloc.
  3. Dispositif d'extinction d'arc selon la revendication 1 ou 2, caractérisé en ce qu'une première boucle de soufflage (81) reliée avec les deux coulisses de guidage d'arc côté pont (61, 62) est prévue pour générer une force de Lorentz orientée en direction du premier pack de tôles d'extinction d'arc (71) sur le premier arc électrique.
  4. Dispositif d'extinction d'arc selon la revendication 3, caractérisé en ce que l'enveloppe magnétique (91) comprend la première coulisse de guidage d'arc côté pont (61) et une section de Lorentz disposée à la parallèle de cette dernière de la boucle de soufflage (81).
  5. Dispositif d'extinction d'arc selon la revendication 3 ou 4, caractérisé en ce que la première boucle de soufflage (81) a des propriétés limitatrices de courant.
  6. Dispositif d'extinction d'arc selon la revendication 3 ou 4, caractérisé en ce que les deux préchambres (41, 42) sont blindées l'une par rapport à l'autre par chacune une enveloppe magnétique associée (91, 92).
  7. Dispositif d'extinction d'arc selon la revendication 2, caractérisé en ce qu'une isolation de préchambre (411) en une matière non conductrice d'électricité entoure la zone d'arc et isole l'arc électrique par rapport à l'enveloppe magnétique (91).
  8. Dispositif d'extinction d'arc selon la revendication 7, caractérisé en ce que sur au moins l'une des parois intérieures de l'isolation de préchambre (411) faisant face à la zone d'arc, il est prévu une courbure (412) .
  9. Dispositif d'extinction d'arc selon la revendication 8, caractérisé en ce que la courbure (412) de l'isolation de préchambre a une structure en forme de V s'ouvrant vers les chambres d'extinction.
  10. Disjoncteur de protection à double coupure, comprenant deux bornes d'alimentation (11), un déclencheur de courant de court-circuit (100) agissant sur un pont de contact (3) et un dispositif d'extinction d'arc selon l'une quelconques des revendications précédentes.
EP03405921A 2003-12-22 2003-12-22 Chambre de soufflage pour un disjoncteur-protecteur possédant une double coupure Expired - Lifetime EP1548773B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50309487T DE50309487D1 (de) 2003-12-22 2003-12-22 Lichtbogenlöscheinrichtung für Schutzschalter mit Doppelunterbrechung
AT03405921T ATE390700T1 (de) 2003-12-22 2003-12-22 Lichtbogenlöscheinrichtung für schutzschalter mit doppelunterbrechung
EP03405921A EP1548773B1 (fr) 2003-12-22 2003-12-22 Chambre de soufflage pour un disjoncteur-protecteur possédant une double coupure
ES03405921T ES2302908T3 (es) 2003-12-22 2003-12-22 Dispositivo de extincion de arco electrico para interruptores de proteccion con interrupcion doble.
US11/007,213 US7081596B2 (en) 2003-12-22 2004-12-09 Arc-quenching device for circuit breakers having double-break contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03405921A EP1548773B1 (fr) 2003-12-22 2003-12-22 Chambre de soufflage pour un disjoncteur-protecteur possédant une double coupure

Publications (2)

Publication Number Publication Date
EP1548773A1 EP1548773A1 (fr) 2005-06-29
EP1548773B1 true EP1548773B1 (fr) 2008-03-26

Family

ID=34530863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03405921A Expired - Lifetime EP1548773B1 (fr) 2003-12-22 2003-12-22 Chambre de soufflage pour un disjoncteur-protecteur possédant une double coupure

Country Status (5)

Country Link
US (1) US7081596B2 (fr)
EP (1) EP1548773B1 (fr)
AT (1) ATE390700T1 (fr)
DE (1) DE50309487D1 (fr)
ES (1) ES2302908T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2590193A1 (fr) 2011-11-04 2013-05-08 ABB Schweiz AG Agencement d'aimant pour un commutateur basse tension

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
DE102005007303B4 (de) * 2005-02-17 2013-03-21 Abb Ag Elektrisches Installationsgerät mit Lichtbogen-Vorkammerraum, Lichtbogenleitschienen und strombegrenzender Lichtbogenlöscheinrichtung
DE102006026064B4 (de) * 2006-06-03 2008-06-05 Moeller Gmbh Elektrische Schaltanordnung und Montageverfahren
US7716816B2 (en) 2006-09-22 2010-05-18 Rockwell Automation Technologies, Inc. Method of manufacturing a switch assembly
US7551050B2 (en) * 2006-09-22 2009-06-23 Rockwell Automation Technologies, Inc. Contactor assembly with arc steering system
DE102009023556B4 (de) * 2009-05-30 2012-01-19 Abb Ag Elektrisches Schaltgerät mit einem thermischen Auslöser
EP2561534B1 (fr) * 2010-04-19 2018-07-11 CARLING TECHNOLOGIES, Inc. Interrupteur de circuit à capacités améliorées d'extinction d'arc
WO2013070465A1 (fr) * 2011-11-09 2013-05-16 Eaton Corporation Appareil de commutation électrique comprenant un ensemble aimant et des première et seconde chambres d'arc
DE102012212236A1 (de) * 2012-07-12 2014-01-16 Siemens Aktiengesellschaft Schutzschaltgerät und Magnetjoch
US8809722B2 (en) * 2012-10-11 2014-08-19 Siemens Industry, Inc. Circuit breaker with translating electrical contact, circuit breaker electrical contact assemblies, and operational methods
US9343251B2 (en) 2013-10-30 2016-05-17 Eaton Corporation Bi-directional direct current electrical switching apparatus including small permanent magnets on ferromagnetic side members and one set of arc splitter plates
FR3023057B1 (fr) * 2014-06-30 2016-07-22 Hager-Electro Sas Declencheur magnetothermique.
US10650993B1 (en) * 2019-03-19 2020-05-12 Siemens Industry, Inc. Circuit breaker with enhanced arc extinguishing chamber
CN111755299B (zh) * 2019-03-29 2022-07-05 Ls产电株式会社 配线用断路器的灭弧装置

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US4743720A (en) * 1985-11-25 1988-05-10 Matsushita Electric Works, Ltd. Current limiting circuit interrupter
US4656446A (en) * 1985-12-17 1987-04-07 Westinghouse Electric Corp. Current limiting circuit breaker with series double break contact system per pole
US4810841A (en) * 1986-07-31 1989-03-07 Siemens Aktiengesellschaft Current-limiting switching element
JPH071657B2 (ja) * 1989-09-18 1995-01-11 三菱電機株式会社 回路遮断器
EP0649155B1 (fr) * 1993-10-15 1997-04-02 Hager Electro S.A. TÔle de conduction double pour chambre de conduction d'arc de disjoncteur
US5694098A (en) * 1996-05-20 1997-12-02 Eaton Corporation Rate of current rise sensitive slot motor and switching apparatus having current limiting contact arrangement incorporating said slot motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2590193A1 (fr) 2011-11-04 2013-05-08 ABB Schweiz AG Agencement d'aimant pour un commutateur basse tension

Also Published As

Publication number Publication date
DE50309487D1 (de) 2008-05-08
US20050150870A1 (en) 2005-07-14
ATE390700T1 (de) 2008-04-15
ES2302908T3 (es) 2008-08-01
US7081596B2 (en) 2006-07-25
EP1548773A1 (fr) 2005-06-29

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