EP0350823A2 - Interrupteur à basse tension - Google Patents

Interrupteur à basse tension Download PDF

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Publication number
EP0350823A2
EP0350823A2 EP89112547A EP89112547A EP0350823A2 EP 0350823 A2 EP0350823 A2 EP 0350823A2 EP 89112547 A EP89112547 A EP 89112547A EP 89112547 A EP89112547 A EP 89112547A EP 0350823 A2 EP0350823 A2 EP 0350823A2
Authority
EP
European Patent Office
Prior art keywords
low
switching device
voltage switching
prechamber
openings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89112547A
Other languages
German (de)
English (en)
Other versions
EP0350823A3 (fr
Inventor
Erhard Runtsch
Rolf Goehle
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 AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
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, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0350823A2 publication Critical patent/EP0350823A2/fr
Publication of EP0350823A3 publication Critical patent/EP0350823A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—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
    • 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
    • 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

Definitions

  • the invention relates to a low-voltage switching device, in particular a circuit breaker, with a contact point which is arranged in an arc chamber with prechamber plates which laterally delimit the arc chamber on both sides.
  • Low-voltage switchgear often have arcing chambers in which the contact point is arranged, in which an arc is ignited when the movable contact piece is lifted off the fixed contact piece, which at its base point leads to damage of the contact pieces by melting of the contact material. At the same time, if the arc is present, the current continues to flow until the arc extinguishes.
  • the arc chambers were delimited with so-called prechamber plates, at least on the chamber sides, in order to achieve a channel effect for the arc and thus its rapid entry into the adjacent quenching chamber.
  • DE-OS 27 04 160 From DE-OS 27 04 160 an electrical switching device has become known, in which the arc chamber is delimited on both sides by arc-proof limiting plates, in particular made of ceramic. This constructive measure proves to be advantageous in order to prevent the arc or the arc gases from migrating laterally out of the arc space and thereby causing damage to the housing.
  • DE-OS 27 04 160 provides that at least one of the surfaces of the boundary plates facing the arc chamber is provided with a material which promotes arc extinguishing. The gas has the task of cooling the arc, which burns at high temperature, and thus extinguishing it.
  • the solution to the object is characterized in that the prechamber plates each have a core made of ferromagnetic material, that the prechamber plates are provided with openings that penetrate through their plate thickness, which form a hole pattern and their size according to the relationship is provided and that the perforated cores of the prechamber plates are extrusion-coated with a gas-emitting insulating material and thus form the prechamber plate.
  • circumferential surface is understood to mean the surface which is delimited in a cylindrical manner by the edges of the opening and is determined by the circumference of the opening and by the wall thickness of the plate.
  • the particular advantage of the design of the prechamber plates according to the invention is that, on the one hand, the ferromagnetic effect of the plate material, which leads to a constriction of the switching arc, is used and, on the other hand, the surface of the prechamber plates, which is covered with gas-emitting insulating material, can be considerably enlarged by introducing a perforated grid is, so that with an externally constant overall volume of the low-voltage switching device or the arc chamber contained therein, a considerably stronger arc than in comparable known arc chambers can be controlled, since a significantly increased cooling capacity due to a larger amount of cooling gas emerging from the insulating material due to the increased surface area of the invention Antechamber plate results.
  • the relationship given with regard to the size of the holes is initially independent of the hole geometry, since it is only important that the area delimiting the respective hole, ie circumference ⁇ plate thickness, is larger than the cross section of the opening made in the prechamber plate.
  • the geometric shape of the opening is initially not defined in more detail, so that in principle any desired opening contour is possible. However, for electrical reasons, in particular in order to reliably rule out the formation of a base for arcing, it is preferable to design the opening in a circular shape.
  • the prechamber plates consist of pure iron.
  • nickel i.e. H. Pure nickel or a nickel alloy can be provided.
  • thermosets for. B. polyoxides or polyamides.
  • each opening is at a minimum distance from the neighboring openings according to their diameter.
  • the openings which are adjacent to the edge of the prechamber plate, have an edge distance of at least one opening diameter as well.
  • Another advantage of the perforated chamber plate according to the invention over the perforated chamber plates described in the prior art is that due to the all-round coating of the starting plate with insulating material, there is no fixed assignment to the installation location, i. that is, the prechamber plate can optionally be arranged on both sides of the arc chamber without disadvantage for the arc quenching behavior.
  • a prechamber plate 10 is shown in perspective, which has a rectangular contour adapted to the arcing chamber, i. H. with two mutually parallel long sides 12, 14 and two mutually parallel transverse sides 16, 18.
  • a bevel 15 is formed between the upper long side 14 and the front transverse side 16 in accordance with the contour of the light chamber.
  • the prechamber plate 10 has openings 20, which are arranged in a hole pattern 22 running to the mentioned outer sides 12, 14, 16, 18.
  • the openings 20 are arranged on the flat surface of the prechamber plate 10, which has a plate thickness s, delimited by the sides 12, 14, 15, 16, 18 and penetrate it completely.
  • the openings 20 are provided as circular bores, the size of which is dimensioned such that, taking into account the plate thickness, there is a larger area than with the flat surface.
  • Another influencing factor which is not expressed in this formulaic relationship, was derived from the wettability of the insulating material to be sprayed on. Taking this aspect into account, it is expedient to provide the openings 20 to be introduced with a sufficiently large diameter so that after the coating with the insulating material the openings still exist and are not clogged by the insulating material.
  • FIG. 2 shows the installation position of the prechamber plates 10 known from FIG. 1 in a circuit breaker 24, the outer housing contour of which is indicated by a dashed line.
  • the prechamber plates 10 are arranged on both sides of a contact point 26, which is formed by a fixed contact piece 25 and a movable contact piece 27.
  • the fixed contact piece 25 continues in an arc guide rail 28, which is guided to an arc extinguishing device 32 formed from quenching plates 30, which is arranged below a magnetic release 34.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
EP19890112547 1988-07-15 1989-07-10 Interrupteur à basse tension Withdrawn EP0350823A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883824025 DE3824025C2 (de) 1988-07-15 1988-07-15 Niederspannungsschaltgerät
DE3824025 1988-07-15

Publications (2)

Publication Number Publication Date
EP0350823A2 true EP0350823A2 (fr) 1990-01-17
EP0350823A3 EP0350823A3 (fr) 1991-03-20

Family

ID=6358747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890112547 Withdrawn EP0350823A3 (fr) 1988-07-15 1989-07-10 Interrupteur à basse tension

Country Status (2)

Country Link
EP (1) EP0350823A3 (fr)
DE (1) DE3824025C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000046828A1 (fr) * 1999-02-01 2000-08-10 Moeller Gmbh Dispositif limiteur de courant a retablissement automatique et a metal liquide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1264164B1 (it) * 1993-04-21 1996-09-17 Sace Spa Interruttore di bassa tensione in scatola isolante
DE102005022213A1 (de) * 2005-05-13 2006-11-16 Abb Patent Gmbh Elektrisches Installationsgerät mit Lichtbogen-Vorkammerraum, Vorkammerplatten und strombegrenzender Lichtbogenlöscheinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2704160A1 (de) * 1977-02-02 1978-08-03 Bbc Brown Boveri & Cie Elektrisches schaltgeraet
DE2716619B1 (de) * 1977-04-15 1978-09-07 Licentia Gmbh Strombegrenzender Leitungsschutzschalter mit Massnahmen zur Erhoehung der Laufgeschwindigkeit des Schaltlichtbogens
FR2475290A1 (fr) * 1980-01-31 1981-08-07 Merlin Gerin Chambre de coupure de disjoncteurs basse tension a joues composites de guidage de l'arc
EP0095090A2 (fr) * 1982-05-25 1983-11-30 CGE- COMPAGNIA GENERALE ELETTROMECCANICA S.p.A. Dispositif pour favoriser l'extinction d'arc dans des dispositifs de commutation tels que disjoncteurs électriques
EP0158124A2 (fr) * 1984-04-11 1985-10-16 Asea Brown Boveri Aktiengesellschaft Dispositif d'extinction d'arc pour interrupteurs électriques

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250909B (fr) * 1967-09-28
DE702052C (de) * 1935-03-07 1941-01-29 Frida Strauss Geb Ruppel Elektrischer Stromunterbrecher mit Lichtbogenloeschung durch Gase oder Daempfe
GB467496A (en) * 1935-11-13 1937-06-14 Sigwart Ruppel Improvements relating to devices for interrupting electric current
DE665327C (de) * 1936-06-21 1938-09-22 Aeg Elektrischer Gasschalter mit Lichtbogenloeschung durch Druckgas
DE1063248B (de) * 1958-10-16 1959-08-13 Calor Emag Elek Zitaets Ag Lasttrennschalter
DE1415944A1 (de) * 1961-03-24 1969-02-06 Licentia Gmbh Schaltgeraet mit einer ungleich breit ausgebildeten Lichtbogenkammer
DE1291009B (de) * 1963-06-01 1969-03-20 Stotz Kontakt Gmbh Installationsselbstschalter
DE2741868C2 (de) * 1977-09-15 1982-11-25 Siemens AG, 1000 Berlin und 8000 München Lichtbogenkammer mit Lichtbogenlaufschienen und perforierten Keramikplatten
DE2923234A1 (de) * 1979-06-08 1980-12-11 Bbc Brown Boveri & Cie Fuer niederspannungsschaltanlagen bestimmter leistungsschalter oder schutzschalter
DE3311052A1 (de) * 1983-03-25 1984-09-27 Siemens AG, 1000 Berlin und 8000 München Selbstschalter, insbesondere leitungsschutzschalter
DE3531040C1 (de) * 1985-08-30 1987-06-04 Licentia Gmbh Loescheinrichtung fuer einen Allstrom-Leitungsschutzschalter
DE8531616U1 (fr) * 1985-11-06 1987-03-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
DE3619241C2 (de) * 1986-06-07 1994-07-21 Kloeckner Moeller Gmbh Löscheinrichtung für einen Leitungsschutzschalter
FR2622736B1 (fr) * 1987-10-28 1995-04-14 Merlin Gerin Disjoncteur basse tension, a courant continu, et a joues de guidage de l'arc

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2704160A1 (de) * 1977-02-02 1978-08-03 Bbc Brown Boveri & Cie Elektrisches schaltgeraet
DE2716619B1 (de) * 1977-04-15 1978-09-07 Licentia Gmbh Strombegrenzender Leitungsschutzschalter mit Massnahmen zur Erhoehung der Laufgeschwindigkeit des Schaltlichtbogens
FR2475290A1 (fr) * 1980-01-31 1981-08-07 Merlin Gerin Chambre de coupure de disjoncteurs basse tension a joues composites de guidage de l'arc
EP0095090A2 (fr) * 1982-05-25 1983-11-30 CGE- COMPAGNIA GENERALE ELETTROMECCANICA S.p.A. Dispositif pour favoriser l'extinction d'arc dans des dispositifs de commutation tels que disjoncteurs électriques
EP0158124A2 (fr) * 1984-04-11 1985-10-16 Asea Brown Boveri Aktiengesellschaft Dispositif d'extinction d'arc pour interrupteurs électriques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000046828A1 (fr) * 1999-02-01 2000-08-10 Moeller Gmbh Dispositif limiteur de courant a retablissement automatique et a metal liquide

Also Published As

Publication number Publication date
EP0350823A3 (fr) 1991-03-20
DE3824025C2 (de) 1994-02-17
DE3824025A1 (de) 1990-01-18

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