EP0158124B1 - Dispositif d'extinction d'arc pour interrupteurs électriques - Google Patents

Dispositif d'extinction d'arc pour interrupteurs électriques Download PDF

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Publication number
EP0158124B1
EP0158124B1 EP85102610A EP85102610A EP0158124B1 EP 0158124 B1 EP0158124 B1 EP 0158124B1 EP 85102610 A EP85102610 A EP 85102610A EP 85102610 A EP85102610 A EP 85102610A EP 0158124 B1 EP0158124 B1 EP 0158124B1
Authority
EP
European Patent Office
Prior art keywords
arc
antechamber
block
prechamber
quenching device
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
EP85102610A
Other languages
German (de)
English (en)
Other versions
EP0158124A2 (fr
EP0158124A3 (en
Inventor
Werner Bruckner
Klaus Dipl.-Ing. Greefe
Erhard Ing. Runtsch (Grad).
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.)
ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Asea Brown Boveri AG Germany
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 Asea Brown Boveri AG Germany filed Critical Asea Brown Boveri AG Germany
Priority to AT85102610T priority Critical patent/ATE63655T1/de
Publication of EP0158124A2 publication Critical patent/EP0158124A2/fr
Publication of EP0158124A3 publication Critical patent/EP0158124A3/de
Application granted granted Critical
Publication of EP0158124B1 publication Critical patent/EP0158124B1/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
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber
    • 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
    • H01H9/302—Means for extinguishing or preventing arc between current-carrying parts wherein arc-extinguishing gas is evolved from stationary parts

Definitions

  • the invention relates to an arc extinguishing device according to the preamble of claim 1.
  • a high-performance switching path with an arc stack in an arc chamber in which a pivotable contact piece with one end is rotatably mounted on one of the two arc guide plates of the package and on its free end carries an electrical connection directly opposite the end of the other arc guide plate designed as a fixed contact piece and an electrical connection point.
  • the switching arc that forms when the switching path is opened moves with its base along the movable contact piece until it is pivoted on the one arc baffle, in order to then turn it from the front into the quenching plate packet from both arc baffles.
  • the ignited switching arc Due to the magnetic field that forms during the separation of the contact pieces, the ignited switching arc is driven with its one foot point along the swivel contact piece in the direction of its bearing point on the one arc guide plate of the quenching plate package, while the other foot point of the arc remains in the area of the fixed contact point of the other arc guide plate. As soon as the arc extends over the full height of the quenching plate package, it can run into the corresponding number of partial arcs in the quenching plate package and cool down and deionize itself sufficiently there.
  • an arc quenching chamber for an electrical installation device with an arc extinguishing plate assigned to each contact point in which iron sheet parts are arranged on both sides of each contact point and are surrounded by insulating material.
  • This configuration has the advantage that, on the one hand, the magnetic blowing of the arc is improved, as a result of which the arc runs in faster away from the contact point and into the arc-quenching plates and thus brings about an improvement in the switch-off process, and, on the other hand, through the gas emission of the U-shaped insulating material stirrup or the insulating material has an additional arc-quenching effect.
  • Another advantage results from the protection of the contact pieces from erosion as a result of the better blowing of the arc, as a result of which the precious metal layer on the contact pieces themselves can be reduced.
  • the described quenching devices which operate on the principle of forced quenching, preferably consist of a prechamber which constricts the arc and brings it to a favorable length, and of a stack of quenching plates connected to it, which divides the arc into partial arcs.
  • a prechamber which constricts the arc and brings it to a favorable length
  • a stack of quenching plates connected to it which divides the arc into partial arcs.
  • Such parts are preferred supported by appropriate shapes of the housing walls from the outside.
  • An internal limitation of the prechamber space is usually achieved by arranging the arc guide rails accordingly.
  • the object of the invention is therefore to design the prechamber so that, in addition to simplifying the assembly, the function and the mode of operation of the arc quenching device are also improved.
  • the crosspieces which connect the two prechamber plates to one another are to be arranged such that a first crosspiece in the region in which the movable contact piece is switched off, i.e. above or behind the arc commutation point, that is the place at which the arc base point changes from the contact nose to the guardrail or commutated, and at least one crossbar in front of the quenching plate package.
  • the crosspiece or crosspieces in front of the quenching plate package prevent backfire in the prechamber space in the case of an arc located in the quenching plate package and divided into individual arcs, since this is deionized more quickly by the or the crosspieces.
  • the gas-emitting effect of the prechamber plates also acts - supported essentially by the webs - right into the sheet cutout of the stack of fire-fighting sheets. In this way, the partial arcs are held more stable between the quenching plates.
  • the partial arcs are re-ignited in the sheet cut-out, the gas-releasing effect of the webs starts immediately, and the arc is accelerated to be split again into the stack of quenching sheets. At the same time, the webs prevent the re-ignited arc from running back into the antechamber.
  • the number of crossbars depends on the switching capacity and the associated arc energy.
  • the prechamber plates which form the lateral boundary of the prechamber, are produced from an injection-moldable or pourable material, both plates being connected to one another by at least two transverse webs and being used as an integral prechamber block in the prechamber.
  • cams are formed on the prechamber block, which are used for positioning in the switch housing, so that additional support points in the switch housing can be omitted. This results in a special cost advantage for the manufacture of the switch housings or their pressing tools. A further improvement is achieved if recesses are provided in the switch housing, into which the cams formed on the prechamber block engage to fix it.
  • the switch housing can also have recesses which accommodate the cams of the prechamber block which are designed as resilient snap elements.
  • the cams can also be riveted from the outside.
  • the one-piece prechamber block it is made of a thermoplastic, with the molded-on cams reaching through the housing wall for its rigid fixation in the prechamber and being deformed rivet-shaped from the outside by means of a hot stamp. In this embodiment, only a single part is required, which is also inexpensive to manufacture and considerably simplifies handling during switch assembly.
  • the contact arrangement shown in Fig. 1 consists of a movable contact piece 10 which is rotatably mounted in a pivot point 11 in the housing, not shown. Its contact horn 12 abuts a fixed contact piece 14 which is connected to a guide rail 16.
  • the guardrail 16 is the upper limit of the quenching chamber 18, which receives a stack of quenching sheets 20.
  • the quench chamber 18 is delimited at the bottom by a guide rail 22, which also delimits the prechamber 24 directly adjoining the quench chamber laterally and downwards.
  • a prechamber block 26 designed according to the invention is inserted into the prechamber 24 delimited by the stack of extinguishing plates 20 and the guide rail 22.
  • FIG. 2 shows an arrangement similar to that in FIG. 1.
  • the contact point is between the contact horn 12 of the movable contact piece 10, which is also rotatably attached to a bearing 11 in the housing, not shown, and a fixed contact piece 23 on the opposite side of the stack 20 of extinguishing plates. Accordingly, the rest of the arrangement changes slightly.
  • the guide rail 22 connects, which laterally and below the prechamber 24 the pre-chamber block 27 used and the arcing chamber 18 limited.
  • the delimitation chamber is delimited at the top by the guide rail 17.
  • the prechamber block 27 has a transverse web 28 at the level of the contact point between the contact horn 12 and the fixed contact piece 23.
  • Three cross webs 31 are provided underneath the cross web 28 and are arranged directly in front of the stack of extinguishing sheets 20.
  • FIG. 3 shows the side view of a prechamber block, the transverse web 28 of which is located opposite the contact point, the commutation point, has a rectangular cross section, and the transverse webs 30 located in front of the stack of quenching plates have a round cross section.
  • the prechamber block 26 is aligned with the housing contour.
  • the area of the side surfaces 25 of the prechamber block 26, which includes the commutation point, has a rectangular recess 32, and on the diagonally opposite side a bevel 34 is provided which bears against the guide rail 22 adapted to the housing contour.
  • the shape of the recess is chosen so that an assembly of the prechamber block 26 is also possible with a movable contact piece 10 and fixed contact piece 14 and the guide rail 22 (according to FIG. 1) already installed.
  • FIG 4 shows a front view of the prechamber block 26 with two prechamber plates 25 which are connected to one another by a crosspiece 28 and by three crosspieces 30.
  • FIG. 5 shows the side view of a prechamber block 26 with a rectangular recess 32 and a bevel 34 corresponding to FIG. 3.
  • the transverse web 29 located laterally next to the commutation point has a triangular cross section.
  • a cross bar 30 is arranged with a round cross section.
  • FIG. 6 shows the front view of such a prechamber block, which consists of two prechamber plates 25 which are connected to one another by a crosspiece 29 and a crosspiece 30.
  • the prechamber block 26 is shown in plan view in FIG. 7.
  • Four cams 36 are formed on the prechamber plates 25, which are connected to one another by a crossbar 28 and by a crossbar 30, which are guided in correspondingly arranged recesses 42 in the housing side walls 40 for fixing the prechamber block 26.
  • FIG. 8 also shows a prechamber block 26 in plan view, four cams 36 being formed on its prechamber plates 25, which are connected to one another by a crosspiece 28 and 30, which pass through the housing wall 40 in recesses 44. To fix the prechamber block, the cams 36 are fastened from the outside to the housing wall 40 by means of rivets 38.
  • FIG. 9 A longitudinally from a front face of slotted pin 46, which is fixedly connected to the prechamber plates 25, has a bead-like thickening 48 directly at its free end, which engages in a form-fitting manner in correspondingly shaped recesses 50 when the prechamber block 26 is inserted into the switch housing, whereby due to the slot 52 in the pin 46 whose ends can be compressed radially to resume the original position after relief.
  • the function of the one-piece prechamber block 26, 27 is that when the movable contact piece 10 is lifted off from the fixed contact piece 14, 23, an arc is ignited, which is limited laterally by the prechamber plates 25 from the fixed contact piece 14, 23 to the quenching plate stack 20, which shifts between the Guardrails 16, 17 and 22 is arranged.
  • the crossbars 28, 29 contribute with their gas-releasing effect to accelerate the arc in the quenching plate stack, where it goes out.
  • the design is provided such that the crossbar 28 behind the commutation point has a much larger gas-emitting area than the crossbars 30 in front of the stack of quenching sheets 20.
  • the crossbars 30 in front of stack of quenching sheets 20, since the gas-emitting area on the back of the arc is many times larger. If there is an arc in the stack of quenching sheets 20 and it is divided into individual arcs, then the crosspieces or crosspieces 30 prevent re-ignition into the pre-chamber 24 due to their gas-releasing effect, since the drive from the quenching chamber 18 back into the pre-chamber 24 is weaker.
  • the crossbar 28, 29, in particular with reference to FIG. 1, has the primary task of keeping the prechamber plates 25 at a distance.
  • the gas-emitting surfaces are the surfaces of the prechamber plates 25; ie, the arc energy is largely converted into decomposition energy in the prechamber area.
  • the webs 28, 29 are also advantageously designed so that after commutation of the arc base from the movable contact piece 10 to the guide rail 16 or 22, the arc running speed is increased by the web 28 or 29 as close as possible above the commutation point becomes; that is, the gas-emitting area is increased in this base region.
  • the drive is on the arc much larger than the jamming effect of the webs 30, so that the arc speed is practically not adversely affected.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Relay Circuits (AREA)
  • Keying Circuit Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (8)

  1. Dispositif d'extinction d'arc électrique pour l'extinction d'un arc électrique apparaissant lors de l'ouverture d'un circuit électrique entre un contact fixe et un contact mobile d'un contacteur électrique, en particulier d'un disjoncteur de puissance ou d'un disjoncteur de protection de ligne comprenant une préchambre (24) disposée à l'intérieur du boîtier de disjoncteur, et à l'intérieur de laquelle se produit l'arc électrique lors de l'ouverture des contacts, et un empilage de tôles d'extinction (20) faisant suite à ladite préchambre et à l'intérieur duquel l'arc électrique est éteint, la préchambre (24) comportant des plaques de préchambre (25) latérales servant au guidage et à la limitation de l'arc électrique, qui sont reliées entre elles pour former un ensemble monobloc par des traverses (28, 29, 30) et sont montées dans la préchambre (24) sous forme d'élément de préchambre (26), parmi les traverses (28, 29, 30) reliant les plaques de préchambre (25), une première traverse (28, 29) étant disposée dans la zone de la position de coupure du contact mobile, où l'une des racines de l'arc électrique est commutée du contact mobile vers une barre conductrice d'arc amenant la racine d'arc dans l'empilage de tôles d'extinction, caractérisé en ce qu'au moins une deuxième traverse (30) est placée directement devant l'empilage de tôles d'extinction (20), et en ce qu'au moins les traverses (28, 29, 30) sont réalisées de manière telle, qu'elles libèrent un gaz lors de l'apparition d'un arc électrique.
  2. Dispositif d'extinction selon la revendication 1, caractérisé en ce que les surfaces extérieures des plaques de préchambre (25) comportent des tétons (36) servant au positionnement à l'intérieur du boîtier de disjoncteur.
  3. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que les tétons (36) sont ajustés dans des cavités correspondantes (42, 44) du boîtier de disjoncteur.
  4. Dispositif d'extinction selon la revendication 3, caractérisé en ce que les cavités (44) sont traverséez par les tétons (36) de l'élément de préchambre (26).
  5. Dispositif d'extinction selon l'une des revendications 3 et 4, caractérisé en ce que les tétons (36) réalisés sur l'élément de préchambre se présentent sous la forme d'éléments encliquetables montés sur ressorts, qui s'encliquètent dans les cavités (44) de la paroi du boîtier de disjoncteur.
  6. Dispositif d'extinction selon la revendication 1, caractérisé en ce que l'élément de préchambre (26) peut être fixé à l'intérieur du boîtier de disjoncteur au moyen de rivets, de vis ou de chevilles.
  7. Dispositif d'extinction selon la revendication 6, caractérisé en ce que les points de fixation prévus pour la fixation sont accessibles de l'extérieur.
  8. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que l'élément de préchambre (26) est réalisé en matière moulable ou en matière moulable par injection.
EP85102610A 1984-04-11 1985-03-07 Dispositif d'extinction d'arc pour interrupteurs électriques Expired - Lifetime EP0158124B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102610T ATE63655T1 (de) 1984-04-11 1985-03-07 Lichtbogenloescheinrichtung fuer elektrische schalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3413555 1984-04-11
DE19843413555 DE3413555A1 (de) 1984-04-11 1984-04-11 Loescheinrichtung fuer elektrische schalter

Publications (3)

Publication Number Publication Date
EP0158124A2 EP0158124A2 (fr) 1985-10-16
EP0158124A3 EP0158124A3 (en) 1988-03-09
EP0158124B1 true EP0158124B1 (fr) 1991-05-15

Family

ID=6233217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102610A Expired - Lifetime EP0158124B1 (fr) 1984-04-11 1985-03-07 Dispositif d'extinction d'arc pour interrupteurs électriques

Country Status (4)

Country Link
EP (1) EP0158124B1 (fr)
JP (1) JPS60230321A (fr)
AT (1) ATE63655T1 (fr)
DE (2) DE3413555A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011066888A1 (fr) 2009-12-04 2011-06-09 Abb Ag Appareil de commutation d'installation avec un dispositif d'extinction d'arc électrique

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62276724A (ja) * 1986-05-26 1987-12-01 松下電工株式会社 消弧装置
JPH0773023B2 (ja) * 1986-06-25 1995-08-02 松下電工株式会社 接点装置
DE3621690A1 (de) * 1986-06-27 1988-01-14 Bbc Brown Boveri & Cie Loescheinrichtung fuer elektrische schalter
JPS63126137A (ja) * 1986-11-14 1988-05-30 松下電工株式会社 消弧装置
JPS63126135A (ja) * 1986-11-14 1988-05-30 松下電工株式会社 消弧装置
JPS63126138A (ja) * 1986-11-14 1988-05-30 松下電工株式会社 消弧装置
DE3824025C2 (de) * 1988-07-15 1994-02-17 Asea Brown Boveri Niederspannungsschaltgerät
DE4007606A1 (de) * 1990-03-09 1991-09-12 Licentia Gmbh Selbstschalter, insbesondere leitungsschutzschalter
DE3908102A1 (de) * 1989-03-13 1990-09-20 Licentia Gmbh Selbstschalter, insbesondere leitungsschutzschalter
EP0387761B1 (fr) * 1989-03-13 1994-12-14 Licentia Patent-Verwaltungs-GmbH Interrupteur automatique, en particulier disjonctueur de protection de ligne
DE102006015305A1 (de) * 2006-03-29 2007-10-04 Siemens Ag Lichtbogen-Löscheinrichtung für einen elektrischen Schalter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1780684A (en) * 1928-02-04 1930-11-04 Gen Electric Circuit-interrupting device
DE1640778B2 (de) * 1966-01-14 1973-10-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Gegen Lichtbogen beanspruchbare Isolierteile von elektrischen Geraten
DE2234423A1 (de) * 1972-07-13 1974-01-24 Bbc Brown Boveri & Cie Installationsselbstschalter in schalenbauweise
GB1476241A (en) * 1973-05-29 1977-06-10 Square D Co Arc-extinguishing materials
DE2704160A1 (de) * 1977-02-02 1978-08-03 Bbc Brown Boveri & Cie Elektrisches schaltgeraet
DE2716619C2 (de) * 1977-04-15 1979-05-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Strombegrenzender Leitungsschutzschalter mit Maßnahmen zur Erhöhung der Laufgeschwindigkeit des Schaltlichtbogeits
DE3030429A1 (de) * 1980-08-12 1982-09-30 Brown, Boveri & Cie Ag, 6800 Mannheim Lichtbogenloeschkammer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011066888A1 (fr) 2009-12-04 2011-06-09 Abb Ag Appareil de commutation d'installation avec un dispositif d'extinction d'arc électrique
DE102009057093A1 (de) 2009-12-04 2011-06-09 Abb Ag Installationsschaltgerät mit einer Lichtbogenlöscheinrichtung

Also Published As

Publication number Publication date
EP0158124A2 (fr) 1985-10-16
DE3582815D1 (de) 1991-06-20
DE3413555A1 (de) 1985-10-24
JPS60230321A (ja) 1985-11-15
EP0158124A3 (en) 1988-03-09
ATE63655T1 (de) 1991-06-15
DE3413555C2 (fr) 1993-05-06

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