EP1042772A1 - Arc extinguisher for switchgear - Google Patents

Arc extinguisher for switchgear

Info

Publication number
EP1042772A1
EP1042772A1 EP98966208A EP98966208A EP1042772A1 EP 1042772 A1 EP1042772 A1 EP 1042772A1 EP 98966208 A EP98966208 A EP 98966208A EP 98966208 A EP98966208 A EP 98966208A EP 1042772 A1 EP1042772 A1 EP 1042772A1
Authority
EP
European Patent Office
Prior art keywords
arc
plates
quenching
quenching plates
legs
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.)
Granted
Application number
EP98966208A
Other languages
German (de)
French (fr)
Other versions
EP1042772B1 (en
Inventor
Christian Schreckinger
Ludwig Niebler
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
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1042772A1 publication Critical patent/EP1042772A1/en
Application granted granted Critical
Publication of EP1042772B1 publication Critical patent/EP1042772B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in arc chamber

Definitions

  • the invention relates to an arc extinguishing device for a switching device with a fixed and a movable contact point and with an arc chamber surrounding it, which is designed as a package of U-shaped stamped quenching plates, the quenching plates being kept at a distance at their ends facing away from the contact points and are held together to form an assembly.
  • a generic arc extinguishing device is disclosed in EP 0 556 109 B1.
  • This switching or protective device an arc arises at the opening contact points when the electrical current is switched off.
  • This arc causes wear at the contact points, i.e. a contact erosion, and delays the activation of the circuit, since the current continues to flow until the arc extinguishes.
  • the electrical switching device is equipped with the arc extinguishing device. This consists of an arc chamber, baffles and various components, which also perform fluidic tasks.
  • the arc chamber is here a package of U-shaped die-cut quenching plates, which are arranged in parallel and kept at a distance. Baffles are arranged at the upper and lower ends of the arc chamber, the fixed contact point being connected to the upper baffle.
  • the arc extinguishing device described above functions in such a way that an arc arises between the contact parts which are moving away from one another when the contact point is opened. This is due to electromagnetic Forces moved outward in the direction of the arc chamber.
  • the arc base points migrate away from the contact points along the baffles electrically connected to the circuit.
  • the arc When the arc has reached the quenching plates, it is divided into partial arcs and cooled by the quenching plates, which leads to the extinction of the partial arcs and to the stopping of the current flow.
  • the invention is therefore based on the object of improving an arc extinguishing device of the type mentioned above in such a way that even delicate designs of the extinguishing plates can be installed and fixed in a functionally reliable manner without additional expenditure.
  • spacing means are provided which keep the legs or feet of the extinguishing plates in the region of the contact points at a distance.
  • FIG. 1 shows an arc extinguishing device according to the invention with a cut-out switching chamber insert
  • FIG. 2 shows the arc extinguishing device according to FIG. 1 with fastening of the extinguishing plates on the switching chamber insert.
  • FIG. 1 shows an arc extinguishing device of a switching device, which here essentially consists of an arc chamber 1 made up of a plurality of U-shaped die-cut extinguishing plates 2 which are assembled into a package.
  • the legs or feet 3 of the quenching plates 2 surround a fixed 4 and a movable contact point 5 of the switching device.
  • the two contact points 4 and 5 lie in an interior formed and shielded by the switching chamber insert 6.
  • the feet or legs 3 are separated from the contact points 4 and 5 by walls 8 of the switching chamber insert.
  • an insulating strip 7 is folded, which keeps the quenching plates 2 at a distance and at the same time holds them together to form an assembly.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The arc splitting plates (2) having a filigree design of an arc extinguishing chamber (1) must be mounted and fixed in an operationally reliable manner. For that purpose, the branches or bases (3) of the arc splitting plates (2) are kept apart by spacers (9), in particular by grooves (9), shaped on the outer side of the arcing chamber insert (6).

Description

Beschreibungdescription
Lichtbogenlöscheinrichtung für ein SchaltgerätArc quenching device for a switching device
Die Erfindung bezieht sich auf eine Lichtbogenlöscheinrichtung für ein Schaltgerät mit einer festen und einer beweglichen Kontaktstelle und mit einer dieser umgebenden Lichtbogenkammer, die als Paket aus U-förmig gestanzten Löschblechen ausgeführt ist, wobei die Löschbleche an ihren den Kontakt- stellen abgewandten Enden auf Abstand gehalten und zu einer Baugruppe zusammengehalten sind.The invention relates to an arc extinguishing device for a switching device with a fixed and a movable contact point and with an arc chamber surrounding it, which is designed as a package of U-shaped stamped quenching plates, the quenching plates being kept at a distance at their ends facing away from the contact points and are held together to form an assembly.
Eine gattungsgemäße Lichtbogenlöscheinrichtung ist in der EP 0 556 109 Bl offenbart. Bei diesem Schalt- bzw. Schutzge- rät entsteht beim Abschalten des elektrischen Stroms an den sich öffnenden Kontaktstellen ein Lichtbogen. Dieser Lichtbogen verursacht an den Kontaktstellen Verschleiß, d.h. einen Kontaktabbrand, und verzögert das Freischalten des Stromkreises, da der Strom solange weiterfließt, bis der Lichtbogen erlischt. Um den Schaden durch den Lichtbogen einzuschränken, ist das elektrische Schaltgerät mit der Lichtbogenlöscheinrichtung ausgerüstet. Diese besteht aus einer Lichtbogenkammer, aus Leitblechen und diversen Komponenten, welche unter anderem auch strömungstechnische Aufgaben erfüllen.A generic arc extinguishing device is disclosed in EP 0 556 109 B1. With this switching or protective device, an arc arises at the opening contact points when the electrical current is switched off. This arc causes wear at the contact points, i.e. a contact erosion, and delays the activation of the circuit, since the current continues to flow until the arc extinguishes. In order to limit the damage caused by the arc, the electrical switching device is equipped with the arc extinguishing device. This consists of an arc chamber, baffles and various components, which also perform fluidic tasks.
Die Lichtbogenkammer ist hier ein Paket aus U-förmig gestanzten Löschblechen, die parallel angeordnet und auf Abstand gehalten sind. Am oberen und unteren Ende der Lichtbogenkammer sind Leitbleche angeordnet, wobei die feste Kontaktstelle mit dem oberen Leitblech verbunden ist.The arc chamber is here a package of U-shaped die-cut quenching plates, which are arranged in parallel and kept at a distance. Baffles are arranged at the upper and lower ends of the arc chamber, the fixed contact point being connected to the upper baffle.
Die zuvor beschriebene Lichtbogenlöscheinrichtung funktioniert in der Weise, daß beim Öffnen der Kontaktstelle ein Lichtbogen zwischen den sich voneinander entfernenden Kon- taktsteilen entsteht. Diese wird durch elektromagnetische Kräfte in Richtung der Lichtbogenkammer nach außen bewegt. Die Lichtbogenfußpunkte wandern dabei von den Kontaktstellen weg entlang der mit der Stromkreis elektrisch verbundenen Leitbleche. Ist der Lichtbogen an den Löschblechen angelangt wird er in Teillichtbögen unterteilt und von den Löschblechen abgekühlt, was zum Erlöschen der Teillichtbögen und zum Stoppen des Stromflusses führt.The arc extinguishing device described above functions in such a way that an arc arises between the contact parts which are moving away from one another when the contact point is opened. This is due to electromagnetic Forces moved outward in the direction of the arc chamber. The arc base points migrate away from the contact points along the baffles electrically connected to the circuit. When the arc has reached the quenching plates, it is divided into partial arcs and cooled by the quenching plates, which leads to the extinction of the partial arcs and to the stopping of the current flow.
Die elektromagnetischen Kräfte, welche den Lichtbogen von den Kontaktstellen weg zur Lichtbogenkammer bewegen, sind um so größer, je länger die Schenkel bzw. Füße der Löschbleche sind, d.h. je stärker die U-Form der Löschbleche ausgeprägt sind. Lange Füße, insbesondere bei filigranen Bauformen von Löschblechen, bringen Probleme der Löschblechbefestigung mit sich. Dabei ist nicht auszuschließen, daß die Schenkel bzw. Füße oder Fußspitzen der Löschbleche aneinandergelangen und verschweißen .The longer the legs or feet of the quenching plate are, the greater the electromagnetic forces that move the arc away from the contact points to the arc chamber, i.e. the more pronounced the U-shape of the quenching plates is. Long feet, particularly in the case of delicate designs of fire-extinguishing sheets, pose problems with the fire-sheet attachment. It cannot be ruled out that the legs or feet or toes of the extinguishing plates will come together and weld.
Daher liegt der Erfindung die Aufgabe zugrunde, eine Lichtbo- genlöscheinrichtung der obengenannten Art dahingehend zu verbessern, daß auch filigrane Bauformen der Löschbleche ohne Zusatzaufwand funktionssicher montiert und fixiert werden können.The invention is therefore based on the object of improving an arc extinguishing device of the type mentioned above in such a way that even delicate designs of the extinguishing plates can be installed and fixed in a functionally reliable manner without additional expenditure.
Die Aufgabe wird dadurch gelöst, daß Abstandsmittel vorgesehen sind, welche die im Bereich der Kontaktstellen liegenden Schenkel bzw. Füße der Löschbleche auf Abstand halten.The object is achieved in that spacing means are provided which keep the legs or feet of the extinguishing plates in the region of the contact points at a distance.
Weitere vorteilhafte Ausgestaltung der Erfindung sind den Un- teransprüchen 2 bis 4 zu entnehmen.Further advantageous embodiments of the invention can be found in subclaims 2 to 4.
Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung näher erläutert. Es zeigen: FIG 1 eine erfindungsgemäße Lichtbogenlöscheinrichtung mit aufgeschnittenem Schaltkammereinsatz und FIG 2 die Lichtbogenlöscheinrichtung gemäß FIG 1 mit Befestigung der Löschbleche am Schaltkammereinsatz.An embodiment of the invention is explained below with reference to a drawing. Show it: 1 shows an arc extinguishing device according to the invention with a cut-out switching chamber insert, and FIG. 2 shows the arc extinguishing device according to FIG. 1 with fastening of the extinguishing plates on the switching chamber insert.
FIG 1 zeigt eine Lichtbogenlöscheinrichtung eines Schaltgeräts, die hier im wesentlichen aus einer Lichtbogenkammer 1 aus mehreren zu einem Paket zusammengesetzten U-förmig gestanzten Löschblechen 2 besteht. Die Schenkel bzw. Füße 3 der Löschbleche 2 umgeben eine feste 4 und eine bewegliche Kontaktstelle 5 des Schaltgeräts. Die beiden Kontaktstellen 4 und 5 liegen in einem durch den Schaltkammereinsatz 6 gebildeten und abgeschirmten Innenraum. Die Füße bzw. Schenkel 3 sind durch Wände 8 des Schaltkammereinsatzes von den Kontakt- stellen 4 und 5 getrennt. Um die Enden der Löschbleche 2, die von den Kontaktstellen 4, 5 abgewandt sind, ist ein Isolierstreifen 7 gefaltet, der die Löschbleche 2 auf Abstand hält und zugleich zu einer Baugruppe zusammenhält.1 shows an arc extinguishing device of a switching device, which here essentially consists of an arc chamber 1 made up of a plurality of U-shaped die-cut extinguishing plates 2 which are assembled into a package. The legs or feet 3 of the quenching plates 2 surround a fixed 4 and a movable contact point 5 of the switching device. The two contact points 4 and 5 lie in an interior formed and shielded by the switching chamber insert 6. The feet or legs 3 are separated from the contact points 4 and 5 by walls 8 of the switching chamber insert. Around the ends of the quenching plates 2, which face away from the contact points 4, 5, an insulating strip 7 is folded, which keeps the quenching plates 2 at a distance and at the same time holds them together to form an assembly.
FIG 2 zeigt die Lichtbogenlöscheinrichtung, wobei an den Wänden 8 des Schaltkammereinsatzes 6 außenseitig Nuten 9 vorgesehen sind, in die die Schenkel bzw. Füße 3 der Löschbleche 2 eingeschoben sind.2 shows the arc extinguishing device, grooves 9 being provided on the outside on the walls 8 of the switching chamber insert 6, into which the legs or feet 3 of the extinguishing plates 2 are inserted.
Alternativ zu der Lösung ist es auch denkbar, andere Ab- standsmittel für die Schenkel bzw. Füße 3 vorzusehen, z.B. am Kunststoffgehäuse des Schaltgeräts selbst. As an alternative to the solution, it is also conceivable to provide other spacing means for the legs or feet 3, e.g. on the plastic housing of the switching device itself.

Claims

Patentansprüche claims
1. Lichtbogenlöscheinrichtung für ein Schaltgerät mit einer festen (4) und einer beweglichen Kontaktstelle (5) und mit einer diese umgebenden Lichtbogenkammer (1) , die als Paket aus U-förmig gestanzten Löschblechen (2) ausgeführt ist, wobei die Löschbleche (2) an ihren den Kontaktstellen (4,5) abgewandten Enden auf Abstand gehalten und zu einer Baugruppe zusammengehalten sind, dadurch gekennzeichnet, daß Abstandsmittel (9) vorgesehen sind, welche die im Bereich der Kontaktstellen (4,5) liegenden Schenkel bzw. Füße (3) der Löschbleche (2) auf Abstand halten.1. Arc extinguishing device for a switching device with a fixed (4) and a movable contact point (5) and with an arc chamber surrounding this (1), which is designed as a package of U-shaped die-cut quenching plates (2), the quenching plates (2) are held at a distance at their ends facing away from the contact points (4, 5) and are held together to form an assembly, characterized in that spacing means (9) are provided which cover the legs or feet (3 ) keep the extinguishing plates (2) at a distance.
2. Lichtbogenlöscheinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Abstandsmittel (9) an einem Schaltkammereinsatz (6) angeformt sind, der die bewegliche (4) und feste Kontaktstelle (5) von den Schenkeln (3) der Löschbleche (2) trennt.2. Arc quenching device according to claim 1, characterized in that the spacing means (9) are formed on a switching chamber insert (6) which separates the movable (4) and fixed contact point (5) from the legs (3) of the quenching plates (2).
3. Lichtbogenlöscheinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Abstandsmittel (9) als am Schaltkammereinsatz (6) außenseitig angeformte Nuten (9) ausgeführt sind, in die die Schenkel (3) der Löschbleche (2) formschlüssig einschiebbar sind.3. Arc extinguishing device according to claim 2, characterized in that the spacing means (9) as on the switching chamber insert (6) are formed on the outside grooves (9) into which the legs (3) of the quenching plates (2) can be inserted in a form-fitting manner.
4. Lichtbogenlöscheinrichtung nach einem der vorangehenden Ansprüche , dadurch gekennzeichnet, daß die Löschbleche (2) an ihren den Kontaktstellen (4,5) abgewandten Enden von einem Isolierstreifen (7) umgeben sind, der die Löschbleche (2) auf Abstand hält und zu einer Baugruppe zusammenhält . 4. Arc extinguishing device according to one of the preceding claims, characterized in that the quenching plates (2) at their contact points (4,5) facing ends are surrounded by an insulating strip (7) which keeps the quenching plates (2) at a distance and to one Holds assembly together.
EP98966208A 1997-12-22 1998-12-11 Arc extinguisher for switchgear Expired - Lifetime EP1042772B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19757332 1997-12-22
DE19757332A DE19757332C1 (en) 1997-12-22 1997-12-22 Arc quenching device for a switching device
PCT/DE1998/003650 WO1999033080A1 (en) 1997-12-22 1998-12-11 Arc extinguisher for switchgear

Publications (2)

Publication Number Publication Date
EP1042772A1 true EP1042772A1 (en) 2000-10-11
EP1042772B1 EP1042772B1 (en) 2002-03-13

Family

ID=7853060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966208A Expired - Lifetime EP1042772B1 (en) 1997-12-22 1998-12-11 Arc extinguisher for switchgear

Country Status (5)

Country Link
US (1) US6288354B1 (en)
EP (1) EP1042772B1 (en)
CN (1) CN1133187C (en)
DE (2) DE19757332C1 (en)
WO (1) WO1999033080A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19935661A1 (en) * 1999-07-29 2001-02-01 Abb Patent Gmbh Switch contact arrangement for a circuit breaker
FR2801722B1 (en) * 1999-11-25 2001-12-28 Schneider Electric Ind Sa CUTTING DEVICE FOR SWITCHING APPARATUS
FR2802701B1 (en) * 1999-12-20 2002-01-18 Schneider Electric Ind Sa SWITCHING DEVICE FOR A SWITCHING APPARATUS
DE10356271B4 (en) 2003-11-28 2008-02-14 Siemens Ag switchgear
US10224162B2 (en) * 2014-09-24 2019-03-05 Siemens Aktiengesellschaft Switching device with arc extinguishing device
US10056210B2 (en) 2016-01-14 2018-08-21 Rockwell Automation Switzerland Gmbh Arc chamber assembly and method
US10840035B1 (en) * 2019-08-29 2020-11-17 Rockwell Automation Switzerland Gmbh Arc chamber venting

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Also Published As

Publication number Publication date
EP1042772B1 (en) 2002-03-13
CN1133187C (en) 2003-12-31
DE19757332C1 (en) 1999-07-22
WO1999033080A1 (en) 1999-07-01
CN1273680A (en) 2000-11-15
US6288354B1 (en) 2001-09-11
DE59803389D1 (en) 2002-04-18

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