EP0743665B1 - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
EP0743665B1
EP0743665B1 EP96810265A EP96810265A EP0743665B1 EP 0743665 B1 EP0743665 B1 EP 0743665B1 EP 96810265 A EP96810265 A EP 96810265A EP 96810265 A EP96810265 A EP 96810265A EP 0743665 B1 EP0743665 B1 EP 0743665B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
erosion
arc
contact
breaker according
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
EP96810265A
Other languages
German (de)
French (fr)
Other versions
EP0743665A3 (en
EP0743665A2 (en
Inventor
Lutz Dr. Niemeyer
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 Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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Publication date
Application filed by ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Publication of EP0743665A2 publication Critical patent/EP0743665A2/en
Publication of EP0743665A3 publication Critical patent/EP0743665A3/en
Application granted granted Critical
Publication of EP0743665B1 publication Critical patent/EP0743665B1/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
    • 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
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • 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
    • H01H33/18—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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field

Definitions

  • the invention relates to a circuit breaker according to the Preamble of claim 1.
  • a gaseous insulating and extinguishing medium preferably sulfur hexafluoride, filled circuit breakers known that an arcing chamber with a power current path and have a nominal current path.
  • the Power current path has at least one fixed and a moving contact.
  • the arcing chamber can be used as single blown or double blown Chamber be formed.
  • the quenching chamber as self-blown chamber be formed, in which the Arc energy required to extinguish it Blow pressure generated itself, which in a blow volume as long is saved until a promising inflation of the Arc is possible.
  • a particularly quick build-up of pressure in the Blowing volume is reached when the arc through one of the known measures is set in rotation. Both known circuit breakers occurs a comparatively large Contact erosion.
  • the advantages achieved by the invention are substantial to see that the arc is in an annular gap burns, so that stretching it out with great certainty is avoided, which has the consequence that the arc energy is limited to controllable values.
  • the volume and also the dimensions of the arcing chamber can thus advantageously be small are kept, so that an advantageous space-saving and inexpensive circuit breaker is created.
  • FIG. 1 shows a first, greatly simplified partial section through a first embodiment of a circuit breaker according to the invention.
  • This circuit breaker has a quenching chamber 1 filled with an insulating medium, for example sulfur hexafluoride (SF 6 gas).
  • the quenching chamber 1 has a longitudinal axis 2, around which the quenching chamber contacts are arranged centrally symmetrically.
  • a fixed contact arrangement 3 made of an electrically conductive metal is rigidly connected to a centrally arranged, cylindrical insulating part 4 made of an insulating material.
  • Polytetrafluoroethylene (PTFE) has proven to be particularly suitable for the production of the guide part 4.
  • the polytetrafluoroethylene (PTFE) can be adapted to the respective operating requirements of the circuit breaker using fillers.
  • the guide part 4 is made of particularly erosion-resistant PTFE. However, it is possible to produce the guide part 4 from other insulating materials, which can also be filled.
  • the guide part 4 extends to a contact arrangement 5 and is partially enclosed by the extinguishing chamber 1 when the latter is switched on.
  • the fixed contact arrangement 3 is provided with an annular erosion contact 6 which is arranged concentrically with the guide part 4.
  • the side of the erosion contact 6 facing the contact arrangement 5 is provided with a ring-shaped cover 7 made of an erosion-resistant, electrically conductive material, preferably graphite.
  • the contact arrangement 5 has an inner contact basket 8, which an outer erosion contact 9 surrounds concentrically.
  • the inner contact basket 8 is actuated in the axial direction by a drive, not shown.
  • the outer erosion contact 9 is arranged in a fixed manner.
  • the inner contact basket 8 and the erosion contact 9 are connected to one another in an electrically conductive manner; they always have the same electrical potential.
  • the side of the fixed erosion contact 9 facing the fixed contact arrangement 3 is provided with an annular cover 10 made of an erosion-resistant, electrically conductive material, preferably graphite.
  • the inner contact basket 8 consists of individual contact fingers that run parallel to one another.
  • the contact fingers each have a burn-off-resistant cap 11 made of electrically conductive material at the tip. Tungsten copper is preferably used for this cap 11.
  • the caps 11 rest with their contact surface 11a on a cylindrical contact surface 3a of the fixed contact arrangement 3 and make electrical contact with this contact surface 3a.
  • the contact surface 3a can be reinforced on the side facing the guide part 4 by means of an erosion ring 3b made of erosion-resistant, electrically conductive material.
  • the current path for the through the closed quenching chamber 1 flowing alternating current leads when comparatively small Nominal currents are to be carried by the fixed Contact arrangement 3 into the caps 11, through the contact basket 8 and further through the part of the Contact arrangement 5. If the arcing chamber 1 for comparative large rated currents is designed, is parallel to that described current path one, usually outside and concentrically arranged to this, separate nominal current path intended.
  • the current path described above is from one to one Insulated housing 12 enclosed.
  • the housing 12 As has particularly suitable for the manufacture of the housing 12 proved to be polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the Polytetrafluoroethylene (PTFE) can be made using fillers the respective operating requirements of the circuit breaker be adjusted.
  • the housing 12 can also be made of another electrically insulating plastic are made and then inside with an appropriate lining Polytetrafluoroethylene (PTFE) can be provided. If comparatively high alternating currents are to be interrupted, so the housing 12 is made of particularly erosion-resistant PTFE manufactured. However, it is possible to make the housing 12 different Insulating materials, which can also be filled, manufacture.
  • the housing 12 has one in the direction of Longitudinal axis 2 pointing paragraph 13, which is in the direction of Longitudinal axis 2 extends. It can also be beneficial to this Paragraph 13 made of a particularly fire-resistant insulating material produce, the paragraph 13 for example by a targeted doping during the manufacture of the housing is made. Paragraph 13 can also, for example, as separate ring made of particularly burn-resistant insulating material are manufactured, which is then poured into the housing 12 becomes. Paragraph 13 extends into the space between the two Burning contacts 6 and 9 into it. The inner surface 14 of the Paragraph 13 is sufficient when the fire chamber 1 is closed comparatively close to the outer surface 8a of the Contact basket 8, but it does not touch them.
  • the Paragraph 13 fills the space between the two erosion contacts 6 and 9 are not completely open between the one flank 13a the paragraph 13 and the cover 7 remains an annular trained space 15 which is formed into an annular Channel 16 merges.
  • the channel 16 opens into a concentric Longitudinal axis 2 arranged, not shown blowing volume on.
  • Between the other edge 13b of paragraph 13 and the Cover 10 remains a ring-shaped Room 17, which in an annular channel 18th transforms.
  • the channel 18 leads down here and opens into one exhaust volume, not shown.
  • the contact basket 8 encloses the guide part 4.
  • FIG 2 shows the arcing chamber 1 shown in FIG a first intermediate position shortly after the beginning of the Turn-off.
  • An arrow 20 indicates the direction of movement of the Contact basket 8 when switching off.
  • the one with the cover 10 provided erosion contact 9 does not move into this Direction.
  • the contact surface 11a of the cap 11 of the contact fingers of the contact basket 8 is already on from the contact surface 3a the erosion ring 3b and then flush on it adjoining surface of the guide part 4 Insulated material slipped with a small arc between the edge of the guide part 4 facing the Abbrandrings 3b and the cap 11 has arisen. This However, the arc burns only briefly on this edge of the Burning rings 3b.
  • the one arc base commutates from the Edge of the erosion ring 3b on the erosion-resistant cover 7 of the Burning contact 6.
  • Arc 21 heats the gas in its environment, i.e. in the room 15, and brings it to a higher pressure level.
  • the pressurized gas then flows like arrows 22 indicate through the channel 16 in the not shown Blow volume from where it is stored.
  • the arc 21 can in this area of the opening movement, the contact surface 11a the cap 11 do not attack, since this contact surface 11a the surface of the guide part 4 rests, whereby it is protected.
  • the current carrying capacity of the contact surface 11a the cap 11 is therefore fully preserved.
  • FIG Off position shows the extinguishing chamber 1 shown in FIG Off position.
  • the contact basket 8 has so far in Direction of arrow 20 moves that the covers 7 of the Contact fingers of the contact basket 8 now within the with the Cover 10 provided fixed erosion contact 9 lie so that the lower base point of the arc 21 from the Cap 11 commutates on the cover 10 of the erosion contact 9 is.
  • the arc 21 now burns between the surface 14 of paragraph 13 and the surface of the guide part 4th formed annular gap 23 between the cover 7 and the Cover 10, so that in this area of the process of Switch-off movement the contact surface 11a of the cap 11 safely against harmful direct effects of the arc 21 is protected.
  • the contact basket 8 is in this position the fixed erosion contact 9 is dielectrically shielded.
  • the annular space 17 is now by the arc 21 also heated up, and the resulting there pressurized gas flows as an arrow 24 indicates through the channel 18 into a not shown exhaust volume below.
  • a particularly favorable combustion behavior results if the Arc 21 rotates.
  • an axial magnetic field acting on the arc 21 necessary.
  • This magnetic field can pass through in a known manner expediently arranged magnetic coils or by appropriate Permanent magnets are generated.
  • 4 is for example, a permanent magnet 27 inside the Guide part 4 arranged concentrically to the annular gap 23, which this magnetic field acting on the arc 21 generated so that the arc 21 in the annular gap 23 around the Longitudinal axis 2 rotates.
  • the arc 21 is extinguished when the arc 21, as shown in Figure 3, between the covers 7 and 10 burns in the annular gap 23.
  • the arc 21 burns in the Usually not stationary, the arc base points change, due to the acting electrodynamic forces, their Position running so that the burn-off of the covers 7 and 10 distributed over their periphery. Now the arc 21 by a magnetic field for rapid rotation in the annular gap 23 brought, so the burn-off of the covers 7 and 10 again.
  • the arc 21 points, depending on the instantaneous value of the alternating current to be switched off, a different one Intensity so that the pressure in room 15 is different. If the arc current in the Area around a current zero crossing, so prevails in Room 15 has a lower gas pressure than in the blowing volume. This Pressure drop between the blowing volume and the room 15 causes a flow of the compressed gas from the Blow volume out through the channel 16 into the room 15 and from there further through the annular gap 23, the room 17 and the channel 18 in the exhaust volume. This gas flow is shown in FIG indicated by a dashed arrow 28. This gas flow cools the arc 21 and brings it in a current zero crossing to go out.

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  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Gas-Insulated Switchgears (AREA)

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung geht aus von einem Leistungsschalter gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a circuit breaker according to the Preamble of claim 1.

STAND DER TECHNIKSTATE OF THE ART

Es sind mit einem gasförmigen Isolier- und Löschmedium, vorzugsweise Schwefelhexafluorid, gefüllte Leistungsschalter bekannt, die eine Löschkammer mit einer Leistungsstrombahn und einer Nennstrombahn aufweisen. In der Regel ist eine mit einer Isolierdüse versehene Lichtbogenlöschzone vorgesehen. Die Leistungsstrombahn weist mindestens einen feststehenden und einen beweglichen Kontakt auf. Die Löschkammer kann als einfach beblasene oder mit einer Doppelblasung versehene Kammer ausgebildet sein. Ferner kann die Löschkammer als selbstbeblasene Kammer ausgebildet sein, bei welcher die Energie des Lichtbogens den für die Löschung desselben nötigen Blasdruck selbst erzeugt, welcher in einem Blasvolumen solange gespeichert wird, bis eine erfolgversprechende Beblasung des Lichtbogens möglich ist. Ein besonders rascher Druckaufbau im Blasvolumen wird erreicht, wenn der Lichtbogen durch eine der bekannten Massnahmen in Rotation versetzt wird. Bei den bekannten Leistungsschaltern tritt ein vergleichsweise grosser Kontaktabbrand auf. It is with a gaseous insulating and extinguishing medium, preferably sulfur hexafluoride, filled circuit breakers known that an arcing chamber with a power current path and have a nominal current path. Usually one with one Insulated nozzle provided arc extinguishing zone. The Power current path has at least one fixed and a moving contact. The arcing chamber can be used as single blown or double blown Chamber be formed. Furthermore, the quenching chamber as self-blown chamber be formed, in which the Arc energy required to extinguish it Blow pressure generated itself, which in a blow volume as long is saved until a promising inflation of the Arc is possible. A particularly quick build-up of pressure in the Blowing volume is reached when the arc through one of the known measures is set in rotation. Both known circuit breakers occurs a comparatively large Contact erosion.

Aus der Offenlegungsschrift DE 3 041 083 A1 ist eine Löschkammeranordnung mit Doppelbeblasung bekannt, welche zwei feststehende, voneinander beabstandete, rohrförmig ausgebildete Kontakte aufweist. Im eingeschalteten Zustand ist der Abstand zwischen den beiden Kontakten mittels eines beweglichen Kontaktkorbs elektrisch leitend überbrückt. Beim Ausschalten gleitet der Kontaktkorb von dem einen der Kontakte herunter und zieht dabei einen Lichtbogen. Dieser Lichtbogen kommutiert, wenn sich der Kontaktkorb weiterbewegt, vom Kontaktkorb auf den zweiten der feststehenden Kontakte, sodass der Lichtbogen nun zwischen den beiden feststehenden Kontakten brennt. Der Lichtbogen wird dort mit druckbeaufschlagtem Isoliergas beblasen, wobei der Druck beispielsweise durch eine Kolben-Zylinder-Anordnung oder durch die Lichtbogenenergie selbst erzeugt werden kann. Die Lichtbogenfusspunkte wandern bei dieser Löschkammeranordnung ins Innere der feststehenden Kontakte und der Lichtbogen verlängert sich danach, sodass die im Lichtbogen umgesetzte Energie ansteigt, was einen beträchtlichen Kontaktabbrand zur Folge hat.From the published patent application DE 3 041 083 A1 is a Extinguishing chamber arrangement with double inflation known, which two fixed, spaced, tubular has trained contacts. Is on the distance between the two contacts using a movable contact basket bridged electrically conductive. At the When switched off, the contact basket slides from one of the contacts down and draws an arc. That arc commutates from the Contact basket on the second of the fixed contacts so that the arc now between the two fixed contacts burning. The arc there is pressurized Blow insulating gas, the pressure, for example, by a Piston-cylinder arrangement or by the arc energy can be generated yourself. The arc base points wander with this quenching chamber arrangement inside the fixed Contacts and the arc then lengthens so that the energy converted in the arc increases what one leads to considerable contact erosion.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Die Erfindung, wie sie in den unabhängigen Ansprüchen gekennzeichnet ist, löst die Aufgabe, einen Leistungsschalter zu schaffen, bei welchem mit einfachen Mitteln der Kontaktabbrand reduziert wird.The invention as set out in the independent claims is marked, solves the task of a circuit breaker to create, in which with simple means the Contact erosion is reduced.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass der Lichtbogen in einem Ringspalt brennt, sodass ein Auslängen desselben mit grosser Sicherheit vermieden wird, was zur Folge hat, dass die Lichtbogenenergie auf kontrollierbare Werte begrenzt wird. Das Volumen und auch die Abmessungen der Löschkammer können damit vorteilhaft klein gehalten werden, sodass ein vorteilhaft raumsparender und preislich günstiger Leistungsschalter entsteht.The advantages achieved by the invention are substantial to see that the arc is in an annular gap burns, so that stretching it out with great certainty is avoided, which has the consequence that the arc energy is limited to controllable values. The volume and also the dimensions of the arcing chamber can thus advantageously be small are kept, so that an advantageous space-saving and inexpensive circuit breaker is created.

Die weiteren Ausgestaltungen der Erfindung sind Gegenstände der abhängigen Ansprüche.The further refinements of the invention are objects of the dependent claims.

Die Erfindung, ihre Weiterbildung und die damit erzielbaren Vorteile werden nachstehend anhand der Zeichnung, welche lediglich einen Ausführungsweg darstellt, näher erläutert.The invention, its further development and the achievable with it Advantages are shown below using the drawing, which represents only one way of execution, explained in more detail.

KURZE BESCHREIBUNG DER ZEICHNUNGBRIEF DESCRIPTION OF THE DRAWING

Es zeigen:

  • Fig.1 einen ersten, stark vereinfachten Teilschnitt durch eine erste Ausführungsform eines erfindungsgemässen Leistungsschalters mit eingeschalteter Löschkammer,
  • Fig.2 einen zweiten, stark vereinfachten Teilschnitt durch die erste Ausführungsform des erfindungsgemässen Leistungsschalters mit einer beim Abschalten in einer ersten Zwischenstellung dargestellten Löschkammer,
  • Fig.3 einen dritten, stark vereinfachten Teilschnitt durch die erste Ausführungsform des erfindungsgemässen Leistungsschalters mit einer beim Abschalten in einer zweiten Zwischenstellung dargestellten Löschkammer, und
  • Fig.4 einen stark vereinfachten Teilschnitt durch eine zweite Ausführungsform des erfindungsgemässen Leistungsschalters.
    • Show it:
  • 1 shows a first, greatly simplified partial section through a first embodiment of a circuit breaker according to the invention with the arcing chamber switched on,
  • 2 shows a second, greatly simplified partial section through the first embodiment of the circuit breaker according to the invention with an arcing chamber shown in a first intermediate position when it is switched off,
  • 3 shows a third, greatly simplified partial section through the first embodiment of the circuit breaker according to the invention with an arcing chamber shown in a second intermediate position when it is switched off, and
  • 4 shows a greatly simplified partial section through a second embodiment of the circuit breaker according to the invention.

    • Bei den Figuren sind gleich wirkende Elemente mit gleichen Bezugszeichen versehen. Alle für das unmittelbare Verständnis der Erfindung nicht erforderlichen Elemente sind nicht dargestellt. In the figures, elements having the same effect are the same Provide reference numerals. All for immediate understanding Elements not required by the invention are not shown.

    WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS OF CARRYING OUT THE INVENTION

    In der Fig.1 ist ein erster, stark vereinfachter Teilschnitt durch eine erste Ausführungsform eines erfindungsgemässen Leistungsschalters dargestellt. Dieser Leistungsschalter weist eine mit einem isolierenden Medium, beispielsweise Schwefelhexafluorid (SF6-Gas), gefüllte Löschkammer 1 auf. Die Löschkammer 1 weist eine Längsachse 2 auf, um welche die Löschkammerkontakte zentrisch symmetrisch angeordnet sind. Eine feststehende Kontaktanordnung 3 aus einem elektrisch leitenden Metall ist mit einem zentral angeordneten, aus einem Isoliermaterial bestehenden, zylindrisch ausgebildeten Führungsteil 4 starr verbunden. Als besonders geeignet für die Herstellung des Führungsteils 4 hat sich Polytetrafluoräthylen (PTFE) erwiesen. Das Polytetrafluoräthylen (PTFE) kann mit Hilfe von Füllstoffen den jeweiligen Betriebsanforderungen des Leistungsschalters angepasst werden. Wenn vergleichsweise hohe Wechselströme zu unterbrechen sind, so wird das Führungsteil 4 aus besonders abbrandfestem PTFE hergestellt. Es ist jedoch möglich, das Führungsteil 4 aus anderen Isolierstoffen, die ebenfalls gefüllt sein können, herzustellen. Das Führungsteil 4 erstreckt sich auf eine Kontaktanordnung 5 zu und wird bei eingeschalteter Löschkammer 1 vom dieser teilweise umschlossen. Die feststehende Kontaktanordnung 3 ist mit einem konzentrisch zum Führungsteil 4 angeordneten, ringförmig ausgebildeten Abbrandkontakt 6 versehen. Die der Kontaktanordnung 5 zugewandte Seite des Abbrandkontakts 6 ist mit einer ringförmig ausgebildeten Abdeckung 7 aus einem abbrandfesten, elektrisch leitenden Material, vorzugsweise Graphit, versehen. Die Kontaktanordnung 5 weist einen inneren Kontaktkorb 8 auf, den ein äusserer Abbrandkontakt 9 konzentrisch umgibt. Der innere Kontaktkorb 8 wird durch einen nicht dargestellten Antrieb in axialer Richtung betätigt. Der äussere Abbrandkontakt 9 ist feststehend angeordnet. Der innere Kontaktkorb 8 und der Abbrandkontakt 9 sind elektrisch leitend miteinander verbunden, sie weisen stets das gleiche elektrische Potential auf. Die der feststehenden Kontaktanordnung 3 zugewandte Seite des feststehenden Abbrandkontakts 9 ist mit einer ringförmig ausgebildeten Abdeckung 10 aus einem abbrandfesten, elektrisch leitenden Material, vorzugsweise Graphit, versehen. Der innere Kontaktkorb 8 besteht aus einzelnen Kontaktfingern, die parallel zueinander verlaufen. Die Kontaktfinger weisen an der Spitze jeweils eine abbrandfeste, aus elektrisch leitendem Material bestehende Kappe 11 auf. Für diese Kappe 11 wird vorzugsweise Wolframkupfer verwendet. Die Kappen 11 liegen im eingeschalteten Zustand der Löschkammer 1 mit ihrer Kontaktfläche 11a auf einer zylindrisch ausgebildeten Kontaktfläche 3a der feststehenden Kontaktanordnung 3 auf und kontaktieren diese Kontaktfläche 3a elektrisch leitend. Die Kontaktfläche 3a kann an der dem Führungsteil 4 zugewandten Seite mittels eines Abbrandrings 3b aus abbrandfestem elektrisch leitendem Material verstärkt werden.1 shows a first, greatly simplified partial section through a first embodiment of a circuit breaker according to the invention. This circuit breaker has a quenching chamber 1 filled with an insulating medium, for example sulfur hexafluoride (SF 6 gas). The quenching chamber 1 has a longitudinal axis 2, around which the quenching chamber contacts are arranged centrally symmetrically. A fixed contact arrangement 3 made of an electrically conductive metal is rigidly connected to a centrally arranged, cylindrical insulating part 4 made of an insulating material. Polytetrafluoroethylene (PTFE) has proven to be particularly suitable for the production of the guide part 4. The polytetrafluoroethylene (PTFE) can be adapted to the respective operating requirements of the circuit breaker using fillers. If comparatively high alternating currents are to be interrupted, the guide part 4 is made of particularly erosion-resistant PTFE. However, it is possible to produce the guide part 4 from other insulating materials, which can also be filled. The guide part 4 extends to a contact arrangement 5 and is partially enclosed by the extinguishing chamber 1 when the latter is switched on. The fixed contact arrangement 3 is provided with an annular erosion contact 6 which is arranged concentrically with the guide part 4. The side of the erosion contact 6 facing the contact arrangement 5 is provided with a ring-shaped cover 7 made of an erosion-resistant, electrically conductive material, preferably graphite. The contact arrangement 5 has an inner contact basket 8, which an outer erosion contact 9 surrounds concentrically. The inner contact basket 8 is actuated in the axial direction by a drive, not shown. The outer erosion contact 9 is arranged in a fixed manner. The inner contact basket 8 and the erosion contact 9 are connected to one another in an electrically conductive manner; they always have the same electrical potential. The side of the fixed erosion contact 9 facing the fixed contact arrangement 3 is provided with an annular cover 10 made of an erosion-resistant, electrically conductive material, preferably graphite. The inner contact basket 8 consists of individual contact fingers that run parallel to one another. The contact fingers each have a burn-off-resistant cap 11 made of electrically conductive material at the tip. Tungsten copper is preferably used for this cap 11. In the switched-on state of the extinguishing chamber 1, the caps 11 rest with their contact surface 11a on a cylindrical contact surface 3a of the fixed contact arrangement 3 and make electrical contact with this contact surface 3a. The contact surface 3a can be reinforced on the side facing the guide part 4 by means of an erosion ring 3b made of erosion-resistant, electrically conductive material.

    Die Strombahn für den durch die geschlossene Löschkammer 1 fliessenden Wechselstrom führt, wenn vergleichsweise kleine Nennströme zu führen sind, von der feststehenden Kontaktanordnung 3 in die Kappen 11, durch den Kontaktkorb 8 und weiter durch den nicht dargestellten Teil der Kontaktanordnung 5. Wenn die Löschkammer 1 für vergleichsweise grosse Nennströme ausgelegt ist, so ist parallel zu der beschriebenen Strombahn eine, in der Regel aussen und konzentrisch zu dieser angeordnete, separate Nennstrombahn vorgesehen.The current path for the through the closed quenching chamber 1 flowing alternating current leads when comparatively small Nominal currents are to be carried by the fixed Contact arrangement 3 into the caps 11, through the contact basket 8 and further through the part of the Contact arrangement 5. If the arcing chamber 1 for comparative large rated currents is designed, is parallel to that described current path one, usually outside and concentrically arranged to this, separate nominal current path intended.

    Die oben beschriebene Strombahn wird von einem aus einem Isoliermaterial gefertigten Gehäuse 12 eingeschlossen. Als besonders geeignet für die Herstellung des Gehäuses 12 hat sich Polytetrafluoräthylen (PTFE) erwiesen. Das Polytetrafluoräthylen (PTFE) kann mit Hilfe von Füllstoffen den jeweiligen Betriebsanforderungen des Leistungsschalters angepasst werden. Das Gehäuse 12 kann auch aus einem anderen elektrisch isolierenden Kunststoff hergestellt werden und dann innen mit einer entsprechenden Auskleidung aus Polytetrafluoräthylen (PTFE) versehen werden. Wenn vergleichsweise hohe Wechselströme zu unterbrechen sind, so wird das Gehäuse 12 aus besonders abbrandfestem PTFE hergestellt. Es ist jedoch möglich, das Gehäuse 12 aus anderen Isolierstoffen, die ebenfalls gefüllt sein können, herzustellen. Das Gehäuse 12 weist einen in Richtung der Längsachse 2 zeigenden Absatz 13 auf, der sich in Richtung der Längsachse 2 erstreckt. Es kann auch vorteilhaft sein, diesen Absatz 13 aus einem besonders abbrandfesten Isoliermaterial herzustellen, wobei der Absatz 13 beispielsweise durch ein gezieltes Dotieren bei der Gehäuseherstellung abbrandfest gemacht wird. Der Absatz 13 kann beispielsweise auch als separater Ring aus besonders abbrandfestem Isoliermaterial gefertigt werden, welcher dann in das Gehäuse 12 eingegossen wird. Der Absatz 13 ragt in den Raum zwischen den beiden Abbrandkontakten 6 und 9 hinein. Die innere Oberfläche 14 des Absatzes 13 reicht bei geschlossener Löschkammer 1 vergleichsweise nahe an die äussere Oberfläche 8a des Kontaktkorbs 8 heran, sie berührt diese jedoch nicht. Der Absatz 13 füllt den Raum zwischen den beiden Abbrandkontakten 6 und 9 nicht vollständig auf, zwischen der einen Flanke 13a des Absatzes 13 und der Abdeckung 7 verbleibt ein ringförmig ausgebildeter Raum 15, der in einen ringförmig ausgebildeten Kanal 16 übergeht. Der Kanal 16 mündet in ein konzentrisch zur Längsachse 2 angeordnetes, nicht dargestelltes Blasvolumen ein. Zwischen der anderen Flanke 13b des Absatzes 13 und der Abdeckung 10 verbleibt ein ebenfalls ringförmig ausgebildeter Raum 17, der in einen ringförmig ausgebildeten Kanal 18 übergeht. Der Kanal 18 führt hier nach unten und mündet in ein nicht dargestelltes Auspuffvolumen ein. Der Kontaktkorb 8 umschliesst das Führungsteil 4. The current path described above is from one to one Insulated housing 12 enclosed. As has particularly suitable for the manufacture of the housing 12 proved to be polytetrafluoroethylene (PTFE). The Polytetrafluoroethylene (PTFE) can be made using fillers the respective operating requirements of the circuit breaker be adjusted. The housing 12 can also be made of another electrically insulating plastic are made and then inside with an appropriate lining Polytetrafluoroethylene (PTFE) can be provided. If comparatively high alternating currents are to be interrupted, so the housing 12 is made of particularly erosion-resistant PTFE manufactured. However, it is possible to make the housing 12 different Insulating materials, which can also be filled, manufacture. The housing 12 has one in the direction of Longitudinal axis 2 pointing paragraph 13, which is in the direction of Longitudinal axis 2 extends. It can also be beneficial to this Paragraph 13 made of a particularly fire-resistant insulating material produce, the paragraph 13 for example by a targeted doping during the manufacture of the housing is made. Paragraph 13 can also, for example, as separate ring made of particularly burn-resistant insulating material are manufactured, which is then poured into the housing 12 becomes. Paragraph 13 extends into the space between the two Burning contacts 6 and 9 into it. The inner surface 14 of the Paragraph 13 is sufficient when the fire chamber 1 is closed comparatively close to the outer surface 8a of the Contact basket 8, but it does not touch them. The Paragraph 13 fills the space between the two erosion contacts 6 and 9 are not completely open between the one flank 13a the paragraph 13 and the cover 7 remains an annular trained space 15 which is formed into an annular Channel 16 merges. The channel 16 opens into a concentric Longitudinal axis 2 arranged, not shown blowing volume on. Between the other edge 13b of paragraph 13 and the Cover 10 remains a ring-shaped Room 17, which in an annular channel 18th transforms. The channel 18 leads down here and opens into one exhaust volume, not shown. The contact basket 8 encloses the guide part 4.

    Die Fig.2 zeigt die in Fig.1 dargestellte Löschkammer 1 in einer ersten Zwischenstellung kurz nach dem Beginn des Abschaltvorgangs. Ein Pfeil 20 gibt die Bewegungsrichtung des Kontaktkorbs 8 beim Ausschalten an. Der mit der Abdeckung 10 versehene Abbrandkontakt 9 bewegt sich nicht mit in diese Richtung. Die Kontaktfläche 11a der Kappe 11 der Kontaktfinger des Kontaktkorbs 8 ist bereits von der Kontaktfläche 3a auf den Abbrandring 3b und danach auf die bündig an ihn anschliessende Oberfläche des Führungsteils 4 aus Isoliermaterial geglitten, wobei ein kleiner Lichtbogen zwischen der dem Führungsteil 4 zugewandten Kante des Abbrandrings 3b und der Kappe 11 entstanden ist. Dieser Lichtbogen brennt jedoch nur kurzzeitig auf diese Kante des Abbrandrings 3b. Sowie die Ausschaltbewegung weiter fortschreitet, kommutiert der eine Lichtbogenfusspunkt von der Kante des Abbrandrings 3b auf die abbrandfeste Abdeckung 7 des Abbrandkontakts 6. Zwischen dieser Abdeckung 7 und der Vorderkante der Kappe 11 brennt nun ein Lichtbogen 21. Dieser Lichtbogen 21 heizt das Gas in seiner Umgebung, also im Raum 15, auf und bringt es auf ein höheres Druckniveau. Das druckbeaufschlagte Gas strömt dann, wie die Pfeile 22 andeuten, durch den Kanal 16 in das nicht dargestellte Blasvolumen ab, wo es gespeichert wird. Der Lichtbogen 21 kann in diesem Bereich der Ausschaltbewegung die Kontaktfläche 11a der Kappe 11 nicht angreifen, da diese Kontaktfläche 11a auf der Oberfläche des Führungsteils 4 aufliegt, wodurch sie geschützt wird. Das Stromtragvermögen der Kontaktfläche 11a der Kappe 11 bleibt demnach voll erhalten.2 shows the arcing chamber 1 shown in FIG a first intermediate position shortly after the beginning of the Turn-off. An arrow 20 indicates the direction of movement of the Contact basket 8 when switching off. The one with the cover 10 provided erosion contact 9 does not move into this Direction. The contact surface 11a of the cap 11 of the contact fingers of the contact basket 8 is already on from the contact surface 3a the erosion ring 3b and then flush on it adjoining surface of the guide part 4 Insulated material slipped with a small arc between the edge of the guide part 4 facing the Abbrandrings 3b and the cap 11 has arisen. This However, the arc burns only briefly on this edge of the Burning rings 3b. As well as the switch-off movement continues progresses, the one arc base commutates from the Edge of the erosion ring 3b on the erosion-resistant cover 7 of the Burning contact 6. Between this cover 7 and the An arc 21 now burns at the front edge of the cap 11 Arc 21 heats the gas in its environment, i.e. in the room 15, and brings it to a higher pressure level. The pressurized gas then flows like arrows 22 indicate through the channel 16 in the not shown Blow volume from where it is stored. The arc 21 can in this area of the opening movement, the contact surface 11a the cap 11 do not attack, since this contact surface 11a the surface of the guide part 4 rests, whereby it is protected. The current carrying capacity of the contact surface 11a the cap 11 is therefore fully preserved.

    Die Fig.3 zeigt die in Fig.1 dargestellte Löschkammer 1 in der Ausschaltstellung. Der Kontaktkorb 8 hat sich soweit in Richtung des Pfeils 20 bewegt, dass die Abdeckungen 7 der Kontaktfinger des Kontaktkorbs 8 nun innerhalb des mit der Abdeckung 10 versehenen feststehenden Abbrandkontakts 9 liegen, sodass der untere Fusspunkt des Lichtbogens 21 von der Kappe 11 auf die Abdeckung 10 des Abbrandkontakts 9 kommutiert ist. Der Lichtbogen 21 brennt nun im zwischen der Oberfläche 14 des Absatzes 13 und der Oberfläche des Führungsteils 4 gebildeten Ringspalt 23 zwischen der Abdeckung 7 und der Abdeckung 10, sodass auch in diesem Bereich des Ablaufs der Ausschaltbewegung die Kontaktfläche 11a der Kappe 11 sicher gegen schädliche Direkteinwirkungen des Lichtbogens 21 geschützt ist. Der Kontaktkorb 8 wird in dieser Position durch den feststehenden Abbrandkontakt 9 dielektrisch abgeschirmt. Der ringförmige Raum 17 wird durch den Lichtbogen 21 nun ebenfalls aufgeheizt, und das dort entstandene druckbeaufschlagte Gas strömt, wie ein Pfeil 24 andeutet, durch den Kanal 18 ab in ein nicht dargestelltes untenliegendes Auspuffvolumen.3 shows the extinguishing chamber 1 shown in FIG Off position. The contact basket 8 has so far in Direction of arrow 20 moves that the covers 7 of the Contact fingers of the contact basket 8 now within the with the Cover 10 provided fixed erosion contact 9 lie so that the lower base point of the arc 21 from the Cap 11 commutates on the cover 10 of the erosion contact 9 is. The arc 21 now burns between the surface 14 of paragraph 13 and the surface of the guide part 4th formed annular gap 23 between the cover 7 and the Cover 10, so that in this area of the process of Switch-off movement the contact surface 11a of the cap 11 safely against harmful direct effects of the arc 21 is protected. The contact basket 8 is in this position the fixed erosion contact 9 is dielectrically shielded. The annular space 17 is now by the arc 21 also heated up, and the resulting there pressurized gas flows as an arrow 24 indicates through the channel 18 into a not shown exhaust volume below.

    Ein besonders günstiges Abbrandverhalten ergibt sich, wenn der Lichtbogen 21 rotiert. Um dieses Rotieren zu erreichen, ist ein axiales, auf den Lichtbogen 21 einwirkendes Magnetfeld nötig. Dieses Magnetfeld kann auf bekannte Weise durch zweckmässig angeordnete Magnetspulen oder durch entsprechende Permanentmagnete erzeugt werden. In der Fig.4 ist beispielsweise ein Permanentmagnet 27 im Innern des Führungsteils 4 konzentrisch zum Ringspalt 23 angeordnet, welcher dieses auf den Lichtbogen 21 einwirkende Magnetfeld erzeugt, sodass der Lichtbogen 21 im Ringspalt 23 um die Längsachse 2 rotiert.A particularly favorable combustion behavior results if the Arc 21 rotates. To achieve this rotation is an axial magnetic field acting on the arc 21 necessary. This magnetic field can pass through in a known manner expediently arranged magnetic coils or by appropriate Permanent magnets are generated. 4 is for example, a permanent magnet 27 inside the Guide part 4 arranged concentrically to the annular gap 23, which this magnetic field acting on the arc 21 generated so that the arc 21 in the annular gap 23 around the Longitudinal axis 2 rotates.

    Zur Erläuterung der Wirkungsweise werden die Figuren nun näher betrachtet. In der Fig.2 ist der Raum 15 gegen unten durch den Absatz 13 und die Kappen 11 abgeschlossen. Der Lichtbogen 21 heizt das in dem Raum 15 befindliche Gas auf. Das aufgeheizte, sich nun auf einem höheren Druckniveau befindende Gas strömt, wie die Pfeile 22 andeuten, durch den Kanal 16 in das Blasvolumen ab, wo es gespeichert wird, bis es für die Löschung des Lichtbogens 21 benötigt wird. Der Raum 15 weist bei dieser Stellung des Kontaktkorbs 8 keine weiteren nennenswerten Abströmquerschnitte auf, sodass praktisch das gesamte druckbeaufschlagte Gas in das Blasvolumen strömt, dadurch ist sichergestellt, dass gleich nach der erfolgten Kontakttrennung eine wirkungsvolle Druckerzeugung stattfinden kann.To explain the mode of operation, the figures are now closer considered. In Figure 2, the room 15 is down through the Paragraph 13 and caps 11 completed. The arc 21 heats the gas in the room 15. The heated up gas is now at a higher pressure level, as arrows 22 indicate, through channel 16 into the Blow volume from where it is stored until it is for the Extinguishing of the arc 21 is required. The room 15 points with this position of the contact basket 8 no further noteworthy discharge cross-sections, so practically that all pressurized gas flows into the blowing volume, this ensures that immediately after the success Contact separation effective pressure generation take place can.

    Die Löschung des Lichtbogens 21 erfolgt, wenn der Lichtbogen 21, wie in Fig.3 dargestellt, zwischen den Abdeckungen 7 und 10 im Ringspalt 23 brennt. Der Lichtbogen 21 brennt in der Regel nicht stationär, die Lichtbogenfusspunkte wechseln, bedingt durch die einwirkenden elektrodynamischen Kräfte, ihre Position laufend, sodass sich der Abbrand der Abdeckungen 7 und 10 über deren Peripherie verteilt. Wird nun der Lichtbogen 21 durch ein Magnetfeld zum schnellen Rotieren im Ringspalt 23 gebracht, so reduziert sich der Abbrand der Abdeckungen 7 und 10 nochmals.The arc 21 is extinguished when the arc 21, as shown in Figure 3, between the covers 7 and 10 burns in the annular gap 23. The arc 21 burns in the Usually not stationary, the arc base points change, due to the acting electrodynamic forces, their Position running so that the burn-off of the covers 7 and 10 distributed over their periphery. Now the arc 21 by a magnetic field for rapid rotation in the annular gap 23 brought, so the burn-off of the covers 7 and 10 again.

    Der Lichtbogen 21 weist, abhängig vom Augenblickswert des abzuschaltenden Wechselstroms, eine unterschiedliche Intensität auf, sodass auch die Druckerzeugung im Raum 15 unterschiedlich stark ist. Wenn der Lichtbogenstrom in den Bereich um einen Stromnulldurchgang gelangt, so herrscht im Raum 15 ein kleinerer Gasdruck als im Blasvolumen. Dieses Druckgefälle zwischen dem Blasvolumen und dem Raum 15 verursacht eine Strömung des komprimierten Gases aus dem Blasvolumen heraus durch den Kanal 16 in den Raum 15 und von dort weiter durch den Ringspalt 23, den Raum 17 und den Kanal 18 in das Auspuffvolumen. In der Fig.3 ist diese Gasströmung durch einen gestrichelt ausgeführten Pfeil 28 angedeutet. Diese Gasströmung kühlt den Lichtbogen 21 und bringt ihn in einem Stromnulldurchgang zum Erlöschen.The arc 21 points, depending on the instantaneous value of the alternating current to be switched off, a different one Intensity so that the pressure in room 15 is different. If the arc current in the Area around a current zero crossing, so prevails in Room 15 has a lower gas pressure than in the blowing volume. This Pressure drop between the blowing volume and the room 15 causes a flow of the compressed gas from the Blow volume out through the channel 16 into the room 15 and from there further through the annular gap 23, the room 17 and the channel 18 in the exhaust volume. This gas flow is shown in FIG indicated by a dashed arrow 28. This gas flow cools the arc 21 and brings it in a current zero crossing to go out.

    Für höhere Betriebsspannungen kann der Abstand zwischen den Abdeckungen 7 und 10 vergrössert werden, wobei der Ringspalt 23 gleichzeitig entsprechend in axialer Richtung verlängert wird. For higher operating voltages, the distance between the Covers 7 and 10 are enlarged, the annular gap 23 simultaneously extended accordingly in the axial direction becomes.

    BEZEICHNUNGSLISTENAME LIST

    11
    Löschkammerextinguishing chamber
    22
    Längsachselongitudinal axis
    33
    feststehende Kontaktanordnungfixed contact arrangement
    3a3a
    Kontaktflächecontact area
    3b3b
    Abbrandringconsumable ring
    44
    Führungsteilguide part
    55
    bewegliche Kontaktanordnungmovable contact arrangement
    66
    Abbrandkontaktarcing
    77
    Abdeckungcover
    88th
    KontaktkorbContact basket
    8a8a
    Oberflächesurface
    99
    Abbrandkontaktarcing
    1010
    Abdeckungcover
    1111
    Kappecap
    11a11a
    Kontaktflächecontact area
    1212
    Gehäusecasing
    1313
    Absatzparagraph
    13a,b13a, b
    Flankeflank
    1414
    Oberflächesurface
    1515
    Raumroom
    1616
    Kanalchannel
    1717
    Raumroom
    1818
    Kanalchannel
    2020
    Pfeilarrow
    2121
    LichtbogenElectric arc
    2222
    Pfeilearrows
    2323
    Ringspaltannular gap
    2424
    Pfeilarrow
    2727
    Permanentmagnetpermanent magnet
    2828
    Pfeilarrow

    Claims (9)

    1. Circuit breaker having at least one cylindrically designed arcing chamber (1), filled with an insulating medium, which has a power current path, arranged in an insulating housing (12) and stretched along a longitudinal axis (2), with a fixed contact arrangement (3) arranged in the power current path, and with a contact arrangement (5) having a moving contact cage (8), both the fixed contact arrangement (3) and the contact arrangement (5) each being provided with a fixed erosion-resistant covering (7, 10), and with a blowing volume which accumulates the increased pressure of the insulating medium which occurs during a breaking process, characterized
      in that in the on position, the contact cage (8) surrounds a guide part (4) designed to be electrically insulating,
      in that the insulating housing (12) has a shoulder (13) which projects into the region between a first erosion-resistant covering (7) and a second erosion-resistant covering (10), and
      in that the two erosion-resistant coverings (7, 10) are arranged concentrically around the region of the moving contact cage (8).
    2. Circuit breaker according to Claim 1, characterized
      in that the guide part (4) and the housing (12) are made from polytetrafluoroethylene (PTFE).
    3. Circuit breaker according to Claim 1 or 2, characterized
      in that means are provided which displace the arc (21) in rotation about the longitudinal axis (2).
    4. Circuit breaker according to Claim 3, characterized
      in that the means which displace the arc (21) in rotation about the longitudinal axis (2) are arranged in the region of the shoulder (13).
    5. Circuit breaker according to one of Claims 1 to 4, characterized
      in that for higher operating voltages, the shoulder (13) is designed extended in the axial direction, and
      in that the erosion-resistant coverings (7, 10) are separated by a greater distance according to the extension of the shoulder (13).
    6. Circuit breaker according to one of the preceding claims, characterized
      in that one annularly designed space (15, 17) is provided on each side of the shoulder (13), of which a first space (15), exposed to the electric-arc energy after the contact separation is connected by a channel (16) to the blowing volume, while a second space (17) exposed to the electric-arc energy is connected via at least one connection to an exhaust volume.
    7. Circuit breaker according to Claim 6, characterized
      in that the channel (16) is designed as an annular channel and,
      in that the at least one connection to the exhaust volume is designed as an annular channel (18).
    8. Circuit breaker according to Claim 1, characterized
      in that the region between the surface of the guide part (4) and the surface (14) of the shoulder (13) is designed as an annular gap (23) when the moving contact cage (8) has left this region.
    9. Circuit breaker according to Claim 1, characterized
      in that at least one of the two erosion-resistant coverings (7, 10) is made from graphite.
    EP96810265A 1995-05-13 1996-04-25 Circuit breaker Expired - Lifetime EP0743665B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19517615 1995-05-13
    DE19517615A DE19517615A1 (en) 1995-05-13 1995-05-13 Circuit breaker

    Publications (3)

    Publication Number Publication Date
    EP0743665A2 EP0743665A2 (en) 1996-11-20
    EP0743665A3 EP0743665A3 (en) 1998-04-22
    EP0743665B1 true EP0743665B1 (en) 2002-09-18

    Family

    ID=7761842

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96810265A Expired - Lifetime EP0743665B1 (en) 1995-05-13 1996-04-25 Circuit breaker

    Country Status (8)

    Country Link
    US (1) US5844189A (en)
    EP (1) EP0743665B1 (en)
    JP (1) JPH08321233A (en)
    KR (1) KR100409412B1 (en)
    CN (1) CN1076515C (en)
    BR (1) BR9602218A (en)
    CA (1) CA2172352A1 (en)
    DE (2) DE19517615A1 (en)

    Families Citing this family (11)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE19830232A1 (en) * 1998-07-07 2000-01-13 Abb Research Ltd Current contact arrangements of a current switch
    EP2662877B1 (en) * 2011-01-07 2019-09-25 Mitsubishi Electric Corporation Switching apparatus
    JP6157824B2 (en) * 2012-09-28 2017-07-05 株式会社東芝 Gas circuit breaker
    JP6289856B2 (en) 2013-10-16 2018-03-07 株式会社東芝 Gas circuit breaker
    FR3028089B1 (en) * 2014-10-30 2016-12-30 Alstom Technology Ltd MEDIUM OR HIGH VOLTAGE SWITCH OR CIRCUIT BREAKER WITH ENHANCED FIXED CONTACTS AND METHOD OF USE
    EP3561840A4 (en) 2016-12-16 2020-08-19 Toshiba Energy Systems & Solutions Corporation Gas-insulation switch device
    CN111357074B (en) * 2017-11-10 2021-12-24 株式会社东芝 Gas circuit breaker
    JP6456581B1 (en) * 2018-06-25 2019-01-23 三菱電機株式会社 Gas circuit breaker
    CN110797217B (en) * 2018-08-02 2022-03-29 平高集团有限公司 Quick mechanical switch and switch fracture thereof
    CN110137810B (en) * 2019-05-26 2024-05-17 余姚市宏宇输变电工程有限公司舜能电气分公司 Switch cabinet
    CN112038967B (en) * 2020-08-25 2022-04-08 国核电力规划设计研究院有限公司 Electric equipment and switch equipment thereof

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    DE49131C (en) * D. J. Reisz, M. Berkovits und J. Bichler in Budapest, Waitzner Boulevard 73 Process for the production of a nickel-tin alloy
    DE758950C (en) * 1940-02-09 1952-04-17 Porzellanfabrik Kahla Pin-shaped and tubular break contact intended for high-voltage switches
    NL208615A (en) * 1940-04-15
    CH324323A (en) * 1953-10-15 1957-09-15 Sprecher & Schuh Ag Contact device, in particular for high-performance switches
    DE1803973U (en) * 1959-04-23 1960-01-14 Siemens Ag ELECTRIC SWITCH.
    DE1220927B (en) * 1963-08-23 1966-07-14 Siemens Ag Electric switch
    DE2208035C3 (en) * 1972-02-17 1979-07-26 Siemens Ag, 000 Berlin Und 8000 Muenchen Contact system for pressure gas switch
    CH594973A5 (en) * 1975-05-28 1978-01-31 Bbc Brown Boveri & Cie
    US4052577A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Magnetically driven ring arc runner for circuit interrupter
    FR2368792A1 (en) * 1976-10-20 1978-05-19 Cem Comp Electro Mec Gas blast circuit breaker - has two annular electrodes, one acting as intermediate on one for light arc extinguishing between first one and chamber partition
    CH612293A5 (en) * 1977-04-29 1979-07-13 Bbc Brown Boveri & Cie
    DE3041083A1 (en) * 1978-11-02 1982-06-03 Siemens AG, 1000 Berlin und 8000 München Contact assembly for switch filled with pressurised gas - has bore of stationary contacts coated with graphite to minimise erosion during arcing at switch=off
    DE8029069U1 (en) * 1980-10-30 1988-05-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
    FR2558299B1 (en) * 1984-01-13 1987-03-20 Alsthom Atlantique HIGH VOLTAGE CIRCUIT BREAKER WITH ARC BLOWING
    EP0270895A1 (en) * 1986-12-08 1988-06-15 BBC Brown Boveri AG Pressurized-gas switch
    DE4111932A1 (en) * 1991-04-12 1992-10-15 Asea Brown Boveri Nozzle in gas blast circuit breaker - has neck with alternating fluoro:polymer and boron nitride-filled fluoro:polymer layers in outer sleeve and at right angles to breaker axis
    DE4212740C2 (en) * 1992-04-16 1997-02-27 Asea Brown Boveri High voltage switch
    DE4221951A1 (en) * 1992-07-02 1994-01-13 Siemens Ag HV switch with arc extinguishing chamber - coupled to arcing region by radial channels inducing turbulence in gas to aid cooling

    Also Published As

    Publication number Publication date
    BR9602218A (en) 1998-04-07
    DE59609674D1 (en) 2002-10-24
    KR100409412B1 (en) 2004-04-09
    CN1076515C (en) 2001-12-19
    US5844189A (en) 1998-12-01
    CA2172352A1 (en) 1996-11-14
    KR960042804A (en) 1996-12-21
    EP0743665A3 (en) 1998-04-22
    DE19517615A1 (en) 1996-11-14
    JPH08321233A (en) 1996-12-03
    EP0743665A2 (en) 1996-11-20
    CN1137160A (en) 1996-12-04

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