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EP0075341B1 - Electric power circuit breaker - Google Patents

Electric power circuit breaker Download PDF

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Publication number
EP0075341B1
EP0075341B1 EP82201030A EP82201030A EP0075341B1 EP 0075341 B1 EP0075341 B1 EP 0075341B1 EP 82201030 A EP82201030 A EP 82201030A EP 82201030 A EP82201030 A EP 82201030A EP 0075341 B1 EP0075341 B1 EP 0075341B1
Authority
EP
European Patent Office
Prior art keywords
contact
circuit breaker
coil
arcing
current
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
Application number
EP82201030A
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German (de)
French (fr)
Other versions
EP0075341A1 (en
Inventor
Blaise Perrenoud
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.)
BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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Filing date
Publication date
Application filed by BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0075341A1 publication Critical patent/EP0075341A1/en
Application granted granted Critical
Publication of EP0075341B1 publication Critical patent/EP0075341B1/en
Expired 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
    • H01H33/70—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
    • 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

Definitions

  • the invention relates to an electrical circuit breaker according to the preamble of patent claim 1.
  • Such a switch has been proposed, for example, in the older, non-prepublished Swiss patent application 3 815/80.
  • the current to be switched off commutates into a current path after opening the rated current contacts, in which it sequentially connects the coil, the arcing contact ring, which is designed as an arcing ring and is electrically conductively connected to the coil, and the second contact contact which is movably arranged with respect to the rated current contact Contact piece flows through.
  • the coil through which the current to be switched off is provided with a ferromagnetic core, a strong magnetic field acts on the arc drawn between the erosion contacts, causing the arc to rotate rapidly around the erosion contact of the first contact piece, which is designed as an arc running ring.
  • this strong magnetic field also makes it difficult to commutate large currents to be switched off from the nominal current path to the coil path.
  • the switch according to the invention is characterized in that the switch-off arc can be blown particularly effectively because of the flow-wise advantageous arrangement of the erosion contacts.
  • an effective additional load on the shutdown arc can also be achieved without the aid of external energy.
  • a fixed contact 1 and a movable contact 2 are shown.
  • the fixed contact 1 has a nominal current contact 3 and an erosion contact 4
  • the movable contact 2 has a nominal current contact 5 and an erosion contact 6.
  • the current is fed to the nominal current contacts 3 and 5 via current connections 7 and 8, respectively.
  • Nominal current contact 3 and current connection 7 are connected via a current conductor 9 to the input of a cylindrical coil 10 surrounding the erosion contact 4.
  • the coil 10 is connected on the output side via an electrical conductor 11 to a conductor 12 made of ferromagnetic material or to an arc running ring 13 which is attached to the end of the coil 10 and faces the movable contact piece 2 and is made of non-magnetizable material.
  • the ferromagnetic conductor 12 is connected to the erosion contact 4 of the fixed contact 1 via a sliding contact 14.
  • the erosion contact 4 has a ferromagnetic part 15 which, together with the ferromagnetic conductor 12 and a further ferromagnetic part 16, form a magnetic circuit in which an opening is provided at least at the location of the arcing ring 13 through which the magnetic field is generated by the shutdown current excited coil can escape.
  • the erosion contact 4 is designed as a nozzle and, together with the ferromagnetic part 15, is arranged to be displaceable along the axis of the coil 10.
  • the erosion contact 4 and thus the ferromagneti penetrate rule's part 15 the coil interior, while in the off position (see right half of Fig. 1) the erosion contact 4 and thus also the ferromagnetic part 15 passes through the coil interior, and the contact surface of the erosion contact 4 is flush with the arc race 13.
  • the erosion contact 4 is held by a spring (not shown), which in the switch-on position causes the contact force at low currents.
  • the contact force is generated far below the nominal current of the switch essentially by the magnetic force acting on the part 15, because enough current flows in parallel with the nominal current contacts via the coil 10.
  • the movement of part 15 is limited in the off position by a stop 17.
  • an insulating gas such as sulfur hexafluoride.
  • the embodiment of the circuit breaker according to the invention shown in FIG. 2 differs from the embodiment of FIG. 1 essentially in that the erosion contact 4 is rigidly attached to the fixed contact 1 and is penetrated in the switch-on position by the erosion contact 6 of the movable contact 1, and that Ferromagnetic part 15 is designed as an insulating trailing nozzle and only partially contains ferromagnetic material.
  • Part 15 may include a ferromagnetic material, the surface of which is coated with an insulating material, such as polytetrafluoroethylene.
  • the switch-off current is commutated from the nominal current to the coil path with a low magnetic burden in accordance with the exemplary embodiment according to FIG. 1, so that when the arcing contacts 4, 6 are separated and the arc is drawn between these contacts, a strong magnetic field is located at the location of the arcing ring 13 is available, by means of which a rapid rotation of the arc 18 and consequently a strong heating of the extinguishing gases in the heating volume 21 is brought about.
  • the insulating, ferromagnetic part 15 achieves a favorable extinguishing geometry and additionally forms a burn protection for the contact 4.
  • the erosion contact 4 of the first contact piece 1 or the insulating ferromagnetic part 15 is a trailing nozzle, it is conceivable to close the nozzle openings of these parts by means of an insulating pin sliding in these openings. This results in a particularly effective pressure increase in the heating volume 21, so that there is a strong blowing of the arc 18, in particular when switching off low currents.
  • An increase in the pressure of the extinguishing gas can also be achieved in that the magnetizable part 15 is piston-shaped at its end facing away from the second switching element 2, and this piston-shaped end in a cylinder filled with extinguishing gas, which is connected to the heating volume 21 via a channel. slides.

Landscapes

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

Description

Die Erfindung betrifft einen elektrischen Leistungsschalter gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an electrical circuit breaker according to the preamble of patent claim 1.

Ein derartiger Schalter ist etwa in der älteren, nicht vorveröffentlichten schweizerischen Patentanmeldung 3 815/80 vorgeschlagen worden. Bei diesem Schalter kommutiert der abzuschaltende Strom nach dem Öffnen der Nennstromkontakte in einen Strompfad, in den er der Reihe nach die Spule, den als Lichtbogenlaufring ausgebildeten und mit der Spule elektrisch leitend verbundenen Abbrandkontakt des ersten Schaltstückes und den gegenüber dem Nennstromkontakt beweglich angeordneten Abbrandkontakt des zweiten Schaltstückes durchfließt. Da die vom abzuschaltenden Strom durchflossene Spule mit einem ferromagnetischen Kern versehen ist, wirkt auf den zwischen den Abbrandkontakten gezogenen Lichtbogen ein starkes magnetisches Feld, durch welches der Lichtbogen in schnelle Rotation um den als Lichtbogenlaufring ausgebildeten Abbrandkontakt des ersten Schaltstückes versetzt wird. Dieses starke magnetische Feld erschwert andererseits aber auch die Kommutation von großen abzuschaltenden Strömen vom Nennstrompfad auf den Spulenpfad.Such a switch has been proposed, for example, in the older, non-prepublished Swiss patent application 3 815/80. With this switch, the current to be switched off commutates into a current path after opening the rated current contacts, in which it sequentially connects the coil, the arcing contact ring, which is designed as an arcing ring and is electrically conductively connected to the coil, and the second contact contact which is movably arranged with respect to the rated current contact Contact piece flows through. Since the coil through which the current to be switched off is provided with a ferromagnetic core, a strong magnetic field acts on the arc drawn between the erosion contacts, causing the arc to rotate rapidly around the erosion contact of the first contact piece, which is designed as an arc running ring. On the other hand, this strong magnetic field also makes it difficult to commutate large currents to be switched off from the nominal current path to the coil path.

Es ist daher Aufgabe der Erfindung, einen Schalter der gattungsgemäßen Art zu schaffen, bei dem die Kommutation großer abzuschaltender Ströme vom Nennstrom- auf den Spulenpfad in einfacher Weise stets mit Sicherheit erfolgt und bei dem gleichzeitig bei Trennung der Abbrandkontakte auf den Ausschaltlichtbogen ein starkes magnetisches Feld wirkt.It is therefore an object of the invention to provide a switch of the generic type in which the commutation of large currents to be switched off from the nominal current to the coil path is always carried out with certainty in a simple manner and at the same time a strong magnetic field when the burn-off contacts are separated on the switch-off arc works.

Diese Aufgabe wird durch die kennzeichnenden Merkmale von Patentanspruch 1 gelöst. Durch diese Maßnahmen ist es möglich, den abzuschaltenden Strom bei kleiner magnetischer Bürde und folglich mit großer Sicherheit vom Nennstrom- auf den Spulenpfad zu kommutieren, bei Trennung der Abbrandkontakte aber die vollständige magnetische Bürde zur Verfügung stehen zu haben.This object is achieved by the characterizing features of claim 1. These measures make it possible to commutate the current to be switched off with a small magnetic burden and consequently with great certainty from the nominal current path to the coil path, but to have the complete magnetic burden available when the erosion contacts are separated.

In der Ausführungsform des erfindungsgemäßen Schalters gemäß Patentanspruch 2 ergibt sich darüber hinaus noch der Vorteil, daß die Antriebsenergie für das zweite Schaltstück verhältnismäßig gering sein kann, da dieses wegen seiner einfachen Konstruktion lediglich eine kleine Masse aufweist.In the embodiment of the switch according to the invention according to claim 2, there is also the advantage that the drive energy for the second contact piece can be relatively low, since this has only a small mass because of its simple construction.

Bei der Ausführungsform des erfindungsgemäßen Schalters gemäß Patentanspruch 3 ergibt sich ein besonders wirkungsvoller Schutz der an der Spule befindlichen Abbrandkontakte vor zu starken Verbrennungen und wird gleichzeitig der Ausschaltlichtbogen auch bei schwachen Strömen auf den Lichtbogenlaufring gedrängt.In the embodiment of the switch according to the invention, there is a particularly effective protection of the erosion contacts located on the coil against excessive burns and, at the same time, the switch-off arc is forced onto the arc running ring even with low currents.

Der erfindungsgemäße Schalter gemäß Patentanspruch 4 zeichnet sich dadurch aus, daß der Ausschaltlichtbogen wegen der strömungsmäßig vorteilhaften Anordnung der Abbrandkontakte besonders wirkungsvoll beblasen werden kann.The switch according to the invention is characterized in that the switch-off arc can be blown particularly effectively because of the flow-wise advantageous arrangement of the erosion contacts.

Hingegen ist es bei der Ausführungsform gemäß Patentanspruch 5 von Vorteil, daß wegen des verhältnismäßig geringen aufzuheizenden Volumens auch bei kleinen Strömen eine kräftige Löschgasströmung und damit eine gute Löschwirkung erreicht werden kann.On the other hand, it is advantageous in the embodiment according to claim 5 that, because of the relatively small volume to be heated, a strong flow of extinguishing gas and thus a good extinguishing effect can be achieved even with small flows.

Mit der Ausführungsform gemäß Patentanspruch 6 läßt sich darüber hinaus ohne Zuhilfenahme einer Fremdenergie eine wirkungsvolle Zusatzbelastung des Abschaltlichtbogens erreichen.With the embodiment according to claim 6, an effective additional load on the shutdown arc can also be achieved without the aid of external energy.

Nachfolgend sind Ausführungsbeispiele der Erfindung anhand der Zeichnung in vereinfachter Form dargestellt. Es zeigt

  • Fig. 1 eine Aufsicht auf einen Schnitt durch eine erste Ausführungsform des erfindungsgemäßen Schalters und
  • Fig. eine Aufsicht auf einen Schnitt durch eine zweite Ausführungsform des erfindungsgemäßen Schalters.
Exemplary embodiments of the invention are shown in simplified form below with reference to the drawing. It shows
  • Fig. 1 is a plan view of a section through a first embodiment of the switch according to the invention and
  • Fig. A plan view of a section through a second embodiment of the switch according to the invention.

In beiden Figuren sind gleiche Teile mit gleichen Bezugszeichen bezeichnet, und ist auf der linken Hälfte die Einschaltstellung und auf der rechten Hälfte eine Ausschaltphase des dargestellten Schalters gezeichnet.In both figures, the same parts are identified by the same reference numerals, and the switch-on position is drawn on the left half and a switch-off phase of the switch shown is drawn on the right half.

In Fig. 1 sind ein feststehendes Schaltstück 1 und ein bewegliches Schaltstück 2 dargestellt. Das feststehende Schaltstück 1 weist einen Nennstromkontakt 3 und einen Abbrandkontakt 4, das bewegliche Schaltstück 2 einen Nennstromkontakt 5 und einen Abbrandkontakt 6 auf. Über Stromanschlüsse 7 bzw. 8 wird der Strom an die Nennstromkontakte 3 bzw. 5 geführt. Nennstromkontakt 3 und Stromanschluß 7 sind über einen Stromleiter 9 mit dem Eingang einer zylinderförmigen, den Abbrandkontakt 4 umgebenden Spule 10 verbunden.In Fig. 1, a fixed contact 1 and a movable contact 2 are shown. The fixed contact 1 has a nominal current contact 3 and an erosion contact 4, the movable contact 2 has a nominal current contact 5 and an erosion contact 6. The current is fed to the nominal current contacts 3 and 5 via current connections 7 and 8, respectively. Nominal current contact 3 and current connection 7 are connected via a current conductor 9 to the input of a cylindrical coil 10 surrounding the erosion contact 4.

Die Spule 10 ist ausgangsseitig über einen elektrischen Leiter 11 mit einem aus ferromagnetischem Material bestehenden Leiter 12 bzw. mit einem an dem den beweglichen Schaltstück 2 zugewandten Ende der Spule 10 angebrachten und aus nichtmagnetisierbarem Material bestehenden Lichtbogenlaufring 13 verbunden. Der ferromagnetische Leiter 12 ist über einen Gleitkontakt 14 mit dem Abbrandkontakt 4 des feststehenden Schaltstückes 1 verbunden. Der Abbrandkontakt 4 weist ein ferromagnetisches Teil 15 auf, welches zusammen mit dem ferromagnetischen Leiter 12 und einem weiteren ferromagnetischen Teil 16 einen magnetischen Kreis bilden, bei dem zumindest am Orte des Lichtbogenlaufringes 13 eine Öffnung vorgesehen ist, durch die das magnetische Feld der durch den Abschaltstrom erregten Spule austreten kann. Der Abbrandkontakt 4 ist als Düse ausgebildet und ist gemeinsam mit dem ferromagnetischen Teil 15 längs der Achse der Spule 10 verschieblich angeordnet. In der Einschaltstellung des Schalters durchsetzt höchstens ein Teil des Abbrandkontaktes 4 und somit des ferromagnetischen Teils 15 das Spuleninnere, während in der Ausschaltstellung (vgl. rechte Hälfte von Fig. 1) der Abbrandkontakt 4 und damit auch das ferromagnetische Teil 15 das Spuleninnere durchsetzt, und die Kontaktfläche des Abbrandkontaktes 4 bündig mit dem Lichtbogenlaufring 13 abschließt. Hierbei wie auch bei der Einschaltstellung wird der Abbrandkontakt 4 durch eine nicht dargestellte Feder gehalten, welche in der Einschaltstellung die Kontaktkraft bei kleinen Strömen bewirkt. Die Kontaktkraft wird bereits weit unterhalb des Nennstromes des Schalters im wesentlichen durch die auf das Teil 15 einwirkende magnetische Kraft erzeugt, weil parallel zu den Nennstromkontakten genügend Strom über die Spule 10 fließt. Die Bewegung des Teils 15 ist in der Ausschaltstellung durch einen Anschlag 17 begrenzt.The coil 10 is connected on the output side via an electrical conductor 11 to a conductor 12 made of ferromagnetic material or to an arc running ring 13 which is attached to the end of the coil 10 and faces the movable contact piece 2 and is made of non-magnetizable material. The ferromagnetic conductor 12 is connected to the erosion contact 4 of the fixed contact 1 via a sliding contact 14. The erosion contact 4 has a ferromagnetic part 15 which, together with the ferromagnetic conductor 12 and a further ferromagnetic part 16, form a magnetic circuit in which an opening is provided at least at the location of the arcing ring 13 through which the magnetic field is generated by the shutdown current excited coil can escape. The erosion contact 4 is designed as a nozzle and, together with the ferromagnetic part 15, is arranged to be displaceable along the axis of the coil 10. In the switched-on position of the switch, at most part of the erosion contact 4 and thus the ferromagneti penetrate rule's part 15 the coil interior, while in the off position (see right half of Fig. 1) the erosion contact 4 and thus also the ferromagnetic part 15 passes through the coil interior, and the contact surface of the erosion contact 4 is flush with the arc race 13. Here, as in the switch-on position, the erosion contact 4 is held by a spring (not shown), which in the switch-on position causes the contact force at low currents. The contact force is generated far below the nominal current of the switch essentially by the magnetic force acting on the part 15, because enough current flows in parallel with the nominal current contacts via the coil 10. The movement of part 15 is limited in the off position by a stop 17.

Der beim Abschalten gezogene Lichtbogen 18 brennt in einem von einer isolierenden Wand 19 und einer leitenden Trennwand 20 begrenzten Aufheizvolumen 21, welches mit einem isolierenden Gas, wie etwa Schwefelhexafluorid, gefüllt ist. Durch den Lichtbogen 18 aufgeheizte Gase gelangen über die als Düsen ausgebildeten Abbrandkontakte 4 und 6 in ein Auspuffvolumen 22.The arc 18 drawn when switching off burns in a heating volume 21 which is delimited by an insulating wall 19 and a conductive partition 20 and which is filled with an insulating gas, such as sulfur hexafluoride. Gases heated by the arc 18 reach an exhaust volume 22 via the erosion contacts 4 and 6 designed as nozzles.

Die Wirkungsweise des erfindungsgemäßen Leistungsschalters ist dann wie folgt:

  • In der auf der linken Hälfte der Fig. 1 dargestellten Einschaltstellung des Schalters sind die beiden Nennstromkontakte 3 und 5 miteinander in elektrisch leitender Berührung und die beiden Abbrandkontakte 4 und 6 kontaktieren sich stirnseitig. Beim Ausschalten wird das bewegliche Schaltstück 2 nach oben bewegt, und es werden daher zunächst die beiden Nennstromkontakte 3 und 5 voneinander getrennt. Hierbei wird der abzuschaltende Strom vom Nennstrompfad auf den Spulenpfad kommutiert. Der Strom fließt nun vom Stromanschluß 7 über den Stromleiter 9 und die Spule 10, den Leiter 11, das ferromagnetische Teil 12, den Gleitkontakt 14, die Abbrandkontakte 4 und 6 und die Trennwand 20 zum Stromanschluß 8. Das magnetische Feld der eingeschalteten Spule 10 beeinflußt den Kommutierungsvorgang nur in geringem Maße, da die magnetische Bürde der Spule wegen des in der Einschalt- bzw. Kommutierungsposition geringen Durchsatzes des ferromagnetischen Teiles 15 durch das Spuleninnere verhältnismäßig klein ist. Volle Bürde ist dann erreicht, wenn der unter dem Einfluß des magnetischen Feldes der Spule 10 dem Abbrandkontakt 6 nachlaufende Abbrandkontakt 4 an den Gleitkontakt 14 anschlägt und dann das Spuleninnere bündig mit dem Lichtbogenlaufring 13 abschließt. Der durch die sich nun trennenden Abbrandkontakte 4 und 6 gezogene Lichtbogen 18 steht unter dem Einfluß des an der Stelle des Lichtbogenlaufringes 13 aus dem nun weitgehend geschlossenen magnetischen Kreis austretenden magnetischen Feldes. Der Lichtbogen 18 rotiert nun zwischen den Abbrandkontakten 4 und 6 bzw. zwischen dem auf gleichem Potential wie der Abbrandkontakt 4 befindlichen Lichtbogenlaufring 13 und dem Abbrandkontakt 6. Hierbei wird der Druck des im Aufheizvolumen 21 befindlichen Löschgases erhöht und der Lichtbogen 18 durch eine durch die Düsenöffnungen der Abbrandkontakte 4 und 6 in das Auspuffvolumen 22 gerichteten Löschgasströmung intensiv beblasen.
The mode of operation of the circuit breaker according to the invention is then as follows:
  • In the switch-on position of the switch shown on the left half of FIG. 1, the two rated current contacts 3 and 5 are in electrically conductive contact with one another and the two erosion contacts 4 and 6 make contact at the end. When switching off, the movable contact piece 2 is moved upward, and therefore the two nominal current contacts 3 and 5 are first separated from one another. The current to be switched off is commutated from the nominal current path to the coil path. The current now flows from the current connection 7 via the current conductor 9 and the coil 10, the conductor 11, the ferromagnetic part 12, the sliding contact 14, the erosion contacts 4 and 6 and the partition 20 to the current connection 8. The magnetic field of the switched-on coil 10 influences the commutation process only to a small extent, since the magnetic burden of the coil is relatively small because of the low throughput of the ferromagnetic part 15 through the coil interior in the switch-on or commutation position. A full burden is reached when the erosion contact 4 following the erosion contact 6 strikes the sliding contact 14 under the influence of the magnetic field of the coil 10 and then the coil interior is flush with the arc race 13. The arcing 18 drawn by the now eroding contacts 4 and 6 is under the influence of the magnetic field emerging from the now largely closed magnetic circuit at the location of the arcing ring 13. The arc 18 now rotates between the erosion contacts 4 and 6 or between the arcing ring 13 located at the same potential as the erosion contact 4 and the erosion contact 6. In this case, the pressure of the quenching gas in the heating volume 21 is increased and the arc 18 through a through the nozzle openings of the erosion contacts 4 and 6 in the exhaust volume 22 directed extinguishing gas flow intensively.

Das in Fig. 2 dargestelle Ausführungsbeispiel des erfindungsgemäßen Leistungsschalters unterscheidet sich von dem Ausführungsbeispiel gemäß Fig. 1 im wesentlichen dadurch, daß der Abbrandkontakt 4 starr am feststehenden Schaltstück 1 angebracht und in der Einschaltstellung vom Abbrandkontakt 6 des beweglichen Schaltstückes 1 durchdrungen ist, und daß das ferromagnetische Teil 15 als isolierende Nachlaufdüse ausgebildet ist und lediglich teilweise ferromagnetisches Material enthält. Das Teil 15 kann etwa ein Ferromagnetikum enthalten, dessen Oberfläche mit einem isolierenden Material, wie etwa Polytetrafluoräthylen, beschichtet ist.The embodiment of the circuit breaker according to the invention shown in FIG. 2 differs from the embodiment of FIG. 1 essentially in that the erosion contact 4 is rigidly attached to the fixed contact 1 and is penetrated in the switch-on position by the erosion contact 6 of the movable contact 1, and that Ferromagnetic part 15 is designed as an insulating trailing nozzle and only partially contains ferromagnetic material. Part 15 may include a ferromagnetic material, the surface of which is coated with an insulating material, such as polytetrafluoroethylene.

Bei dieser Ausführungsform wird entsprechend dem Ausführungsbeispiel gemäß Fig. 1 der Abschaltstrom vom Nennstrom- auf den Spulenpfad bei geringer magnetischer Bürde kommutiert, so daß bei Trennung der Abbrandkontakte 4, 6 und Ziehen des Lichtbogens zwischen diesen Kontakten am Orte des Lichtbogenlaufringes 13 ein starkes magnetisches Feld zur Verfügung steht, durch welches eine rasche Rotation des Lichtbogens 18 und demzufolge ein starkes Aufheizen der Löschgase im Aufheizvolumen 21 bewirkt wird. Durch das isolierend ausgebildete, ferromagnetische Teil 15 wird eine günstige Löschgeometrie erreicht und zusätzlich ein Abbrandschutz für den Kontakt 4 gebildet.In this embodiment, the switch-off current is commutated from the nominal current to the coil path with a low magnetic burden in accordance with the exemplary embodiment according to FIG. 1, so that when the arcing contacts 4, 6 are separated and the arc is drawn between these contacts, a strong magnetic field is located at the location of the arcing ring 13 is available, by means of which a rapid rotation of the arc 18 and consequently a strong heating of the extinguishing gases in the heating volume 21 is brought about. The insulating, ferromagnetic part 15 achieves a favorable extinguishing geometry and additionally forms a burn protection for the contact 4.

Anstatt den Abbrandkontakt 4 des ersten Schaltstückes 1 bzw. das isolierend ausgebildete, ferromagnetische Teil 15 als Nachlaufdüse auszubilden, ist es denkbar, die Düsenöffnungen dieser Teile mittels eines in diesen Öffnungen gleitenden, isolierenden Zapfens zu verschließen. Hierdurch wird eine besonders wirkungsvolle Druckerhöhung im Aufheizvolumen 21 erzielt, so daß sich inbesondere bei der Abschaltung schwacher Ströme eine kräftige Beblasung des Lichtbogens 18 ergibt. Eine Erhöhung des Druckes des Löschgases kann auch dadurch erreicht werden, daß das magnetisierbare Teil 15 an seinem vom zweiten Schaltstück 2 abgewandten Ende kolbenförmig ausgebildet ist, und dieses kolbenförmig ausgebildete Ende in einem löschgasgefüllten Zylinder, welcher über einen Kanal mit dem Aufheizvolumen 21 verbunden ist, gleitet.Instead of forming the erosion contact 4 of the first contact piece 1 or the insulating ferromagnetic part 15 as a trailing nozzle, it is conceivable to close the nozzle openings of these parts by means of an insulating pin sliding in these openings. This results in a particularly effective pressure increase in the heating volume 21, so that there is a strong blowing of the arc 18, in particular when switching off low currents. An increase in the pressure of the extinguishing gas can also be achieved in that the magnetizable part 15 is piston-shaped at its end facing away from the second switching element 2, and this piston-shaped end in a cylinder filled with extinguishing gas, which is connected to the heating volume 21 via a channel. slides.

Claims (6)

1. Electric power circuit breaker having two contact members (1, 2) which are movable with respect to one another in a quenching gas and contain in each case at least one rated-current contact (3, 5) and one arcing contact (4, 6), and a cylindrical coil (10) which is provided with a magnetisable core and is connected between the arcing contact (4) and the rated-current contact (3) of a first one (1) of the two contact members (1, 2), at the end facing the arcing contact (6) of a second one (2) of the two contact members (1, 2) of which coil an arcing ring (13) is provided which is electrically conductively connected to the arcing contact (4) of the first contact member (1), characterised in that the core has a part (15) which is arranged to be displaceable along the coil axis and consists at least partially of ferromagnetic material and, in the on-position of the circuit breaker, penetrates at the most a part of the interior of the coil and, in the off-position of the circuit breaker, closes the interior of the coil flush with the arcing ring (13).
2. Circuit breaker according to claim 1, characterised in that the part (15) has at its end facing the second contact member (2) an annular contact surface which is electrically conductively connected to the coil (10).
3. Circuit breaker according to claim 1, characterised in that the part (15) is provided with an insulating surface.
4. Circuit breaker according to one of claims 2 or 3, characterised in that the part (15) is a part of the arcing contact (4), constructed as a nozzle, of the first contact member (1).
5. Circuit breaker according to one of claims 2 or 3, characterised in that the part (15) at its end facing the second contact member (2) is closed by means of an insulating pin.
6. Circuit breaker according to one of claims 1-5, characterised in that the part (15) is constructed in the form of a piston at its end facing away from the second contact member (2).
EP82201030A 1981-09-16 1982-08-16 Electric power circuit breaker Expired EP0075341B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5970/81 1981-09-16
CH597081 1981-09-16

Publications (2)

Publication Number Publication Date
EP0075341A1 EP0075341A1 (en) 1983-03-30
EP0075341B1 true EP0075341B1 (en) 1985-01-23

Family

ID=4302300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82201030A Expired EP0075341B1 (en) 1981-09-16 1982-08-16 Electric power circuit breaker

Country Status (5)

Country Link
US (1) US4463230A (en)
EP (1) EP0075341B1 (en)
JP (1) JPS5887719A (en)
DE (1) DE3262053D1 (en)
YU (1) YU173582A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH661144A5 (en) * 1983-10-28 1987-06-30 Bbc Brown Boveri & Cie HIGH VOLTAGE CIRCUIT BREAKERS.
CH662443A5 (en) * 1983-10-28 1987-09-30 Bbc Brown Boveri & Cie EXHAUST GAS SWITCH.
GB8607398D0 (en) * 1986-03-25 1986-04-30 Northern Eng Ind Arc interrupter
GB8607399D0 (en) * 1986-03-25 1986-04-30 Northern Eng Ind Arc interrupter
FR2596578B1 (en) * 1986-03-28 1994-05-06 Merlin Et Gerin ELECTRIC CIRCUIT BREAKER WITH SELF-EXPANSION AND ROTATING ARC
FR2617633B1 (en) * 1987-07-02 1989-11-17 Merlin Gerin CIRCUIT BREAKER WITH ROTATING ARC AND EXPANSION
JPH02101442U (en) * 1989-01-30 1990-08-13
US4980527A (en) * 1989-02-08 1990-12-25 A. B. Chance Company Arc spinner interrupter
US5015810A (en) * 1989-02-08 1991-05-14 A. B. Chance Company Arc spinner interrupter
AU5267790A (en) * 1989-12-05 1991-06-26 A.B. Chance Company Arc spinner interrupter
FR3019934B1 (en) * 2014-04-14 2017-12-08 Alstom Technology Ltd ROTATING ARC CIRCUIT BREAKER HAVING AN INDUCTIVE COIL HAVING A HIGH STRENGTH
EP3504726B1 (en) * 2016-08-26 2020-12-02 ABB Power Grids Switzerland AG Switch and method for disconnecting a switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE532552C (en) * 1928-01-15 1931-09-01 Sigwart Ruppel Dipl Ing Arrangement for switches with arc extinguishing by compressed gas and by an electromagnetic field
BE389067A (en) * 1932-06-08
US2439952A (en) * 1944-08-31 1948-04-20 Westinghouse Electric Corp Circuit interrupter
US4249051A (en) * 1978-03-27 1981-02-03 Electric Power Research Institute Arc spinner interrupter with contact follower
FR2422243A1 (en) * 1978-04-07 1979-11-02 Alsthom Cgee Gas dielectric HV circuit breaker - has annular secondary electrodes and arc extinction windings
FR2464550A1 (en) * 1979-09-03 1981-03-06 Merlin Gerin MAGNETIC BLOW SWITCH IN ARC ROTATION

Also Published As

Publication number Publication date
JPH0354412B2 (en) 1991-08-20
JPS5887719A (en) 1983-05-25
EP0075341A1 (en) 1983-03-30
US4463230A (en) 1984-07-31
DE3262053D1 (en) 1985-03-07
YU173582A (en) 1985-03-20

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