EP0157242A2 - Arc extinguishing means for electrical-load switches - Google Patents

Arc extinguishing means for electrical-load switches Download PDF

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Publication number
EP0157242A2
EP0157242A2 EP85102869A EP85102869A EP0157242A2 EP 0157242 A2 EP0157242 A2 EP 0157242A2 EP 85102869 A EP85102869 A EP 85102869A EP 85102869 A EP85102869 A EP 85102869A EP 0157242 A2 EP0157242 A2 EP 0157242A2
Authority
EP
European Patent Office
Prior art keywords
quenching
arc
plates
contact piece
movable contact
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
EP85102869A
Other languages
German (de)
French (fr)
Other versions
EP0157242A3 (en
EP0157242B1 (en
Inventor
Rolf Dirks
Wolfgang Pehlken
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.)
Felten and Guilleaume Energietechnik AG
Original Assignee
Felten and Guilleaume Energietechnik 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 Felten and Guilleaume Energietechnik AG filed Critical Felten and Guilleaume Energietechnik AG
Priority to AT85102869T priority Critical patent/ATE56562T1/en
Publication of EP0157242A2 publication Critical patent/EP0157242A2/en
Publication of EP0157242A3 publication Critical patent/EP0157242A3/en
Application granted granted Critical
Publication of EP0157242B1 publication Critical patent/EP0157242B1/en
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H33/10—Metal parts

Definitions

  • the invention relates to an arc extinguishing device for switching devices in electrical power engineering according to the preamble of claim 1.
  • Arc extinguishing devices have the task of extinguishing the arc that occurs in switches when switched off. Such an arc occurs when the contacts are opened due to the evaporation of the last metal bridge due to the current heat. With switch disconnectors and circuit breakers, it is important to make this arc disappear as quickly as possible and to create sufficient insulation between the contacts. While with direct current it is important to achieve a high arc voltage in the switching chambers, alternating current is the effective reduction of the charge carriers in the short time between a zero current crossing and the oscillation of the recurring voltage. It depends very much on the type of switch whether the final power interruption occurs after one or more zero crossings. It is important that the arc gap is sufficiently cooled.
  • Circuit breakers for medium voltage that work according to this method require relatively large quenching chambers, which are very expensive due to their complexity.
  • the invention is therefore based on the object of developing an arc extinguishing device for switching devices, particularly in the medium and high voltage range, which, with the same performance, requires less effort than the previously known devices.
  • the advantages achieved by the invention are that the use of quenching plates reduces the size of the quenching device.
  • this extinguishing device can be easily manufactured and easily installed in existing systems.
  • a movable contact piece 1 designed as a double separating knife is shown, the pivot point of which rests on a bushing 2.
  • the convenient contact piece is connected to a coupling rod 3 belonging to a drive.
  • the counterpart to the movable contact piece forms a fixed contact piece 4, which is fastened on a busbar 5.
  • Supports 6 are used to hold the busbar.
  • the quenching chamber device consists of a quenching chamber 7 which is equipped with a plurality of quenching plates 8.
  • the quenching plates are arranged parallel and overlapping, the arc inlet openings 9 pointing towards the movable contact piece.
  • the arc entry openings are further arranged such that the distance between the end of the movable contact piece and the individual arc entry openings increases as the opening of the movable contact piece increases.
  • the individual quenching plates are surrounded by quench chamber walls 10.
  • Plastic holders 11 and 12 establish the connection between the two arcing chamber walls. In addition, the plastic holder 12 still serves to secure the arcing chamber on the busbar.

Abstract

In an arc quenching device a quenching chamber filled with sulfur hexafluoride is provided with a plurality of superimposed overlapping ascending quenching plates having openings defining arc inlets. A movable contact cooperating with a stationary contact is insertable via the arc inlets into the quenching chamber.

Description

Die Erfindung betrifft eine Lichtbogenlöscheinrichtung für Schaltgeräte der elektrischen Energietechnik gemäß dem Oberbegriff des Anspruchs 1.The invention relates to an arc extinguishing device for switching devices in electrical power engineering according to the preamble of claim 1.

Lichtbogenlöscheinrichtungen haben die Aufgabe, den beim Ausschalten in Schaltern auftretenden Lichtbogen zu löschen. Ein derartiger Lichtbogen entsteht beim Öffnen der Kontakte durch das Verdampfen der letzten Metallbrücke durch die Stromwärme. bei Lasttrenn- und Leistungsschaltern kommt es darauf an, diesen Lichtbogen möglichst rasch zum Verschwinden zu bringen und eine genügende Isolation zwischen den Kontakten herzustellen. Während es bei Gleichstrom darauf ankommt, in den Schaltkammern eine große Lichtbogenspannung zu erreichen, handelt es sich bei Wechselstrom um die wirksame Verringerung der Ladungsträger in der kurzen Zeit zwischen einem Stromnulldurchgang und dem Aufschwingen der wiederkehrenden Spannung. Es hängt ganz wesentlich von der Art des Schalters ab, ob die endgültige Stromunterbrechung nach einem oder mehreren Nulldurchgängen erfolgt. Wichtig ist hierbei, daß die Lichtbogenstrecke ausreichend gekühlt wird.Arc extinguishing devices have the task of extinguishing the arc that occurs in switches when switched off. Such an arc occurs when the contacts are opened due to the evaporation of the last metal bridge due to the current heat. With switch disconnectors and circuit breakers, it is important to make this arc disappear as quickly as possible and to create sufficient insulation between the contacts. While with direct current it is important to achieve a high arc voltage in the switching chambers, alternating current is the effective reduction of the charge carriers in the short time between a zero current crossing and the oscillation of the recurring voltage. It depends very much on the type of switch whether the final power interruption occurs after one or more zero crossings. It is important that the arc gap is sufficiently cooled.

Es gibt nun verschiedene Mittel, um einen Lichtbogen zwischen zwei sich öffnenden Kontaktstücken zu löschen. Bekannt ist, den Schaltlichtbogen durch magnetische Felder in eine Schaltkammer zu blasen, wo eine Abkühlung an entsprechend ausgebildeten und lichtbogenfesten Kammerwänden erfolgt.There are various ways of extinguishing an arc between two contact pieces that open. It is known to blow the switching arc through magnetic fields into a switching chamber, where cooling takes place on suitably designed and arc-resistant chamber walls.

Leistungsschalter für Mittelspannung, die nach diesem Verfahren arbeiten, benötigen jedoch verhältnismäßig große Löschkammern, die aufgrund ihres Aufwandes sehr teuer sind.Circuit breakers for medium voltage that work according to this method, however, require relatively large quenching chambers, which are very expensive due to their complexity.

Im Bereich der Mittel- und Hochspannung kommen auch Einrichtungen zum Zuge, in welchen eine kräftige Gasströmung qegen die zu kühlende Lichtbogenzone erzeugt wird. Dies kann einmal dadurch geschehen, daß die Löschgasströmung vom Schalter selbst erzeugt wird. - Ein Schalter, der nach diesem Prinzip arbeitet, ist aus der EP-OS O 068 951 bekannt. Zum andern wird das Löschgas mit Hilfe von Kompressoren auf den erforderlichen Druck gebracht und in Behältern gespeichert. Beide Mittel zur Lichtbogenlöschung sind jedoch mit einem großen Aufwand verbunden.In the area of medium and high voltage, facilities are also used in which a strong gas flow is generated opposite the arc zone to be cooled. This can happen in that the extinguishing gas flow is generated by the switch itself. - A switch that works according to this principle is known from EP-OS O 068 951. On the other hand, the extinguishing gas is brought to the required pressure with the help of compressors and stored in containers. Both means of arc extinguishing are associated with a great deal of effort.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Lichtbogenlöscheinrichtung für Schaltgeräte besonders im Mittel-und Hochspannungsbereich zu entwickeln, die bei gleicher Leistungsfähigkeit gegenüber den bisherigen bekannten Einrichtungen einen geringeren Aufwand erfordert.The invention is therefore based on the object of developing an arc extinguishing device for switching devices, particularly in the medium and high voltage range, which, with the same performance, requires less effort than the previously known devices.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.

Die mit der Erfindung erzielten Vorteile bestehen darin, daß durch die Verwendung von Löschblechen eine Verkleinerung der Löscheinrichtung erreicht wird. Zudem läßt sich diese Löscheinrichtung auf einfache Weise herstellen und mühelos in vorhandene Systeme einbauen.The advantages achieved by the invention are that the use of quenching plates reduces the size of the quenching device. In addition, this extinguishing device can be easily manufactured and easily installed in existing systems.

Vorteilhafte Aus- und Weiterbildungen des Gegenstandes nach Anspruch 1 sind den Unteransprüchen zu entnehmen.Advantageous developments and further developments of the subject matter according to claim 1 can be found in the dependent claims.

Ein Ausführungsbeispiel der Erfindung ist in Zeichnungen dargestellt und wird im folgenden näher erläutert.An embodiment of the invention is shown in drawings and is explained in more detail below.

Es zeigen

  • Fig. 1 eine zu einem Schaltgerät gehörende Lichtbogenlöscheinrichtung, in perspektivischer Darstellung
  • Fig. 2 die Löscheinrichtung in Seitenansicht und
  • Fig. 3 in Draufsicht
Show it
  • Fig. 1 an arc extinguishing device belonging to a switching device, in a perspective view
  • Fig. 2 shows the extinguishing device in side view
  • Fig. 3 in plan view

Nach Fig. 1 ist von einem Schaltgerät ein als Doppeltrennmesser ausgebildetes bewegliches Kontaktstück 1 dargestellt, dessen Drehpunkt auf einer Durchführung 2 ruht. Das beweqliche Kontakstück ist mit einer zu einem Antrieb gehörenden Koppelstange 3 verbunden. Das Gegenstück zu dem beweglichen Kontaktstück bildet ein festes Kontaktstück 4, das auf einer Sammelschiene 5 befestigt ist. Zur Aufnahme der Sammelschiene dienen Stützer 6.1 of a switching device, a movable contact piece 1 designed as a double separating knife is shown, the pivot point of which rests on a bushing 2. The convenient contact piece is connected to a coupling rod 3 belonging to a drive. The counterpart to the movable contact piece forms a fixed contact piece 4, which is fastened on a busbar 5. Supports 6 are used to hold the busbar.

Nach den Fig. 1 bis 3 besteht die Löschkammereinrichtung aus einer Löschkammer 7, die mit mehreren Löschblechen 8 bestückt ist. Die Löschbleche sind hierbei parallel und überlappend angeordnet, wobei die Lichtbogeneintrittsöffnungen 9 zum beweglichen Kontaktstück hinweisen. Die Lichtbogeneintrittsöffnungen sind ferner so angeordnet, daß der Abstand des Endes des beweglichen Kontaktstücks zu den einzelnen Lichtbogeneintrittsöffnungen mit zunehmender Öffnung des beweglichen Kotaktstücks größer wird. Die einzelnen Löschbleche sind von Löschkammerwänden 10 eingefaßt. Kunststoffhalter 11 und 12 stellen die Verbindung zwischen den beiden Löschkammerwänden her. Darüber hinaus dient der Kunststoffhalter 12 noch der Befestigung der Löschkammer auf der Sammelschiene.According to FIGS. 1 to 3, the quenching chamber device consists of a quenching chamber 7 which is equipped with a plurality of quenching plates 8. The quenching plates are arranged parallel and overlapping, the arc inlet openings 9 pointing towards the movable contact piece. The arc entry openings are further arranged such that the distance between the end of the movable contact piece and the individual arc entry openings increases as the opening of the movable contact piece increases. The individual quenching plates are surrounded by quench chamber walls 10. Plastic holders 11 and 12 establish the connection between the two arcing chamber walls. In addition, the plastic holder 12 still serves to secure the arcing chamber on the busbar.

Claims (10)

1. Lichtbogenlöscheinrichtung für Schaltgeräte der elektrischen Energietechnik, mit einem mit Schwefelhexafluorid oder Mischungen mit Schwefelhexafluorid gefüllten Löschraum, in welchem je Phase mindestens ein festes und ein bewegliches Kontaktstück eingesetzt sind, dadurch gekennzeichnet , daß die Lichtbogenlöscheinrichtung aus Löschblechen (8) besteht, die den Kontaktstücken (1,4) zugeordnet sind.1. Arc extinguishing device for switching devices in electrical power engineering, with a quenching chamber filled with sulfur hexafluoride or mixtures with sulfur hexafluoride, in which at least one fixed and one movable contact piece are used for each phase, characterized in that the arc quenching device consists of quenching plates (8) which form the contact pieces (1,4) are assigned. 2. Lichtbogenlöscheinrichtung nach Anspruch 1, dadurch gekennzeichnet , daß die Löschbleche (8) parallel zur Bewegungsrichtung des beweglichen Kontaktstückes (1) angeordnet sind, die wenigstens teilweise mit der magnetischen Treibrichtung des Lichtbogens übereinstimmt.2. Arc quenching device according to claim 1, characterized in that the quenching plates (8) are arranged parallel to the direction of movement of the movable contact piece (1), which at least partially coincides with the magnetic driving direction of the arc. 3. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet , daß die Löschbleche (8) aus Stahlblech bestehen, die von Löschkammerwänden (10) aus Isolierstoff eingefaßt sind.3. Arc quenching device according to one of claims 1 and 2, characterized in that the quenching plates (8) consist of sheet steel, which are enclosed by quenching chamber walls (10) made of insulating material. 4. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Löschbleche (8) gegeneinander und gegenüber den Kontaktstücken (1,4) und einer Sammelschiene (5) isoliert sind.4. Arc quenching device according to one of claims 1 to 3, characterized in that the quenching plates (8) are insulated from one another and from the contact pieces (1, 4) and a busbar (5). 5. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , daß die Löschbleche (8) überlappend derart geschichtet sind, daß der magnetisch aufgeteilte Lichtbogen durch eine ununterbrochene Kühlfläche begrenzt wird.5. Arc quenching device according to one of claims 1 to 4, characterized in that the quenching plates (8) are layered overlapping such that the magnetically divided arc is limited by an uninterrupted cooling surface. 6. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet , daß die Löschbleche (8) parallel geschichtet sind.6. Arc quenching device according to one of claims 1 to 5, characterized in that the quenching plates (8) are layered in parallel. 7. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet , daß die Löschbleche (8) derart überlappend in den Löschkammerwänden (10) angeordnet sind, daß die Abstände vom Ende des beweglichen Kontaktstücks (1) zu den Lichtbogeneintrittsöffnungen (9) der Löschbleche mit zunehmender Öffnung des beweglichen Kontaktstücks größer werden.7. Arc quenching device according to one of claims 1 to 6, characterized in that the quenching plates (8) are arranged so as to overlap in the quenching chamber walls (10) that the distances from the end of the movable contact piece (1) to the arc inlet openings (9) of the quenching plates become larger with increasing opening of the movable contact piece. 8. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet , daß die Löschkammerwände (10) durch zwei Halter (11, 12) zu einer Löschkammer (7) verbunden sind, die als einstückiges Teil hergestellt und in der Nähe des festen Kontaktstücks (4) befestigt ist.8. L maybe arc extinguishing device according to one of claims 1 to 7, characterized in that the quenching chamber walls (10) by two holders (11, 12) connected to a quenching chamber (7) are manufactured as a single piece and in the vicinity of the fixed contact piece (4) is attached. 9. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet , daß die Löschbleche (8) aus einem Metall hergestellt sind, das mit einer von diesem Metall abweichenden Metallschicht versehen ist.9. Arc quenching device according to one of claims 1 to 8, characterized in that the quenching plates (8) are made of a metal which is provided with a different metal layer from this metal. 10. Lichtbogenlöscheinrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet , daß die Löschkammer (8) zusätzlich zu einer Lichtbogenblaseinrichtung einsetzbar ist.10. Arc extinguishing device according to one of claims 1 to 9, characterized in that the quenching chamber (8) can be used in addition to an arc blowing device.
EP85102869A 1984-04-04 1985-03-13 Arc extinguishing means for electrical-load switches Expired - Lifetime EP0157242B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85102869T ATE56562T1 (en) 1984-04-04 1985-03-13 ARC EXTINGUISHING DEVICE FOR SWITCHING DEVICES IN ELECTRICAL POWER TECHNOLOGY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843412566 DE3412566A1 (en) 1984-04-04 1984-04-04 ARC EXTINGUISHING DEVICE FOR SWITCHGEAR OF ELECTRICAL ENERGY TECHNOLOGY
DE3412566 1984-04-04

Publications (3)

Publication Number Publication Date
EP0157242A2 true EP0157242A2 (en) 1985-10-09
EP0157242A3 EP0157242A3 (en) 1987-12-16
EP0157242B1 EP0157242B1 (en) 1990-09-12

Family

ID=6232594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102869A Expired - Lifetime EP0157242B1 (en) 1984-04-04 1985-03-13 Arc extinguishing means for electrical-load switches

Country Status (5)

Country Link
US (1) US4629840A (en)
EP (1) EP0157242B1 (en)
JP (1) JPH0650607B2 (en)
AT (1) ATE56562T1 (en)
DE (3) DE3412566A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676317A1 (en) * 1991-05-06 1992-11-13 Abb Stroemberg Sahkonjakelu Oy ARC EXTINGUISHING APPARATUS FOR CIRCUIT BREAKERS.
EP0626708A1 (en) * 1993-05-25 1994-11-30 AEG Sachsenwerk GmbH Load break switch
EP0673048A1 (en) * 1994-03-19 1995-09-20 AEG Sachsenwerk GmbH Arc quenching device with arc quenching blades

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933535A1 (en) * 1989-10-07 1991-04-11 Felten & Guilleaume Energie Gas-insulated metal-clad switchgear installation - has plug connection to feedthrough leading to pivot of lever which moves contact reversibly between bus-bar and earthing point
US9129761B2 (en) 2012-12-20 2015-09-08 Eaton Electrical Ip Gmbh & Co. Kg Switching device suitable for direct current operation

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US840743A (en) * 1906-06-07 1907-01-08 George Beres Adjustable shade or curtain fixture.
US1107976A (en) * 1912-04-02 1914-08-18 John Francis Mccoy Tamp.
DE1219578B (en) * 1960-12-07 1966-06-23 Licentia Gmbh Self-switch in narrow design with single break
FR1445425A (en) * 1964-09-03 1966-07-08 Siemens Ag Advanced compressed gas electric switch
DE1232644B (en) * 1961-03-10 1967-01-19 Licentia Gmbh Switching device with an arc chamber containing a soldering plate assembly
US3821507A (en) * 1970-01-30 1974-06-28 Westinghouse Electric Corp Circuit interrupters utilizing supersonic flow
DE2323350A1 (en) * 1973-04-13 1974-10-31 Bbc Brown Boveri & Cie PRESSURE GAS SWITCH WITH A CLOSED EXHAUST CHAMBER SYSTEM

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US840743A (en) * 1906-06-07 1907-01-08 George Beres Adjustable shade or curtain fixture.
US1107976A (en) * 1912-04-02 1914-08-18 John Francis Mccoy Tamp.
DE1219578B (en) * 1960-12-07 1966-06-23 Licentia Gmbh Self-switch in narrow design with single break
DE1232644B (en) * 1961-03-10 1967-01-19 Licentia Gmbh Switching device with an arc chamber containing a soldering plate assembly
FR1445425A (en) * 1964-09-03 1966-07-08 Siemens Ag Advanced compressed gas electric switch
US3821507A (en) * 1970-01-30 1974-06-28 Westinghouse Electric Corp Circuit interrupters utilizing supersonic flow
DE2323350A1 (en) * 1973-04-13 1974-10-31 Bbc Brown Boveri & Cie PRESSURE GAS SWITCH WITH A CLOSED EXHAUST CHAMBER SYSTEM

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676317A1 (en) * 1991-05-06 1992-11-13 Abb Stroemberg Sahkonjakelu Oy ARC EXTINGUISHING APPARATUS FOR CIRCUIT BREAKERS.
US5403983A (en) * 1991-05-06 1995-04-04 Abb Stromberg Sahkonjakelu Oy Arc quenching apparatus for circuit breakers
EP0626708A1 (en) * 1993-05-25 1994-11-30 AEG Sachsenwerk GmbH Load break switch
EP0673048A1 (en) * 1994-03-19 1995-09-20 AEG Sachsenwerk GmbH Arc quenching device with arc quenching blades

Also Published As

Publication number Publication date
EP0157242A3 (en) 1987-12-16
DE3412566C2 (en) 1988-01-07
DE3412566A1 (en) 1985-10-17
JPS60227323A (en) 1985-11-12
DE8410454U1 (en) 1985-05-15
US4629840A (en) 1986-12-16
EP0157242B1 (en) 1990-09-12
JPH0650607B2 (en) 1994-06-29
DE3579607D1 (en) 1990-10-18
ATE56562T1 (en) 1990-09-15

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