EP0033355B1 - Gas-blast circuit-breaker - Google Patents

Gas-blast circuit-breaker Download PDF

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Publication number
EP0033355B1
EP0033355B1 EP80103499A EP80103499A EP0033355B1 EP 0033355 B1 EP0033355 B1 EP 0033355B1 EP 80103499 A EP80103499 A EP 80103499A EP 80103499 A EP80103499 A EP 80103499A EP 0033355 B1 EP0033355 B1 EP 0033355B1
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EP
European Patent Office
Prior art keywords
pressure
pressure accumulator
chamber
gas
blast circuit
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
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EP80103499A
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German (de)
French (fr)
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EP0033355A1 (en
Inventor
Adrian W. Dr. Dipl.-Ing. Roth
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Rockwell Automation Switzerland GmbH
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Sprecher und Schuh AG
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Publication date
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Priority to AT80103499T priority Critical patent/ATE4354T1/en
Publication of EP0033355A1 publication Critical patent/EP0033355A1/en
Application granted granted Critical
Publication of EP0033355B1 publication Critical patent/EP0033355B1/en
Expired legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a gas pressure switch with a fixed and a movable contact piece which can be brought into and out of engagement with one another, with a blowing nozzle which can be released by the movable contact piece in the course of the switch-off movement and which adjoins an arc chamber on the inlet side, the arc chamber having at least one Inlet pressure relief valve is connected to a pressure storage chamber (see, for example, DE-A-2 741 022).
  • a pressure gas switch of the type mentioned at the outset is also known from CH-AS 596 662.
  • the pressure accumulator chamber equipped with a spring-loaded free piston opens into a gap formed between the arc chamber and the blow nozzle.
  • This gas pressure switch is assembled from a relatively large number of parts and is economically disadvantageous.
  • the object of the invention is to provide a gas pressure switch which is economically advantageous and is suitable for the interruption of both small and large currents occurring in practice.
  • the pressure accumulator space connected to the arc space via at least one inlet pressure relief valve has at least one outlet check valve connecting the pressure accumulator space to the arc space and that at least one such pressure accumulator space is present.
  • the pressure storage spaces can be connected pneumatically in parallel or in series, the pressure storage space provided for a smaller pressure value in relation to the adjacent pressure storage space being closer to the arc space in a series connection.
  • the pressure storage spaces can also be connected both in series and in parallel.
  • the outlet check valves adjacent to the arc space are preferably tangential flap valves which cause the gas to flow in tangentially from the pressure storage space into the arc space.
  • the pressure storage spaces and the arc space can be equipped with reinforcement and cooling walls made of metal.
  • the pressure gas switch shown in Fig. 1 has a with an electronegative gas, for. B. with sulfur hexafluoride, filled, consisting of insulating material 1, which carries the fixed contact piece 2 connected to the one terminal of the switch.
  • a burning ring 3 made of graphite is placed in front of the fixed contact piece.
  • the movable contact piece 4 is pulled down during a switch-off movement by a drive, not shown, in the sliding contact 5 connected to the other connection of the switch.
  • the blowing nozzle 6 made of insulating material is fastened in the housing 1.
  • the blowing nozzle 6 is connected to the arc chamber 7 on the inlet side.
  • the pressure storage spaces 8 and 9 can be divided by radial partition walls, not shown in FIG. 1.
  • the segment-shaped partial spaces can be provided for different pressure values.
  • the inlet pressure relief valves of the individual segment-shaped subspaces have different response pressure values.
  • the pressure storage spaces for. B. existing cooling fins made of copper sheets.
  • the mode of operation of the compressed gas switch described with reference to the two figures is as follows: During a switch-off movement, the movable contact piece 4 is pulled downward in the arrangement shown in FIG. 1. Between the fixed contact piece 2, respectively. the erosion ring 3 and the movable contact piece 4, an arc arises after the contact separation. The resulting hot and strongly ionized gases flow into the arc chamber and cause a pressure increase there depending on the current to be interrupted.
  • the inlet pressure relief valves 10 have a lower response pressure than the opposite inlet pressure relief valves 11. Accordingly, up to a first current limit, no inlet pressure relief valve will respond. This current range is intended for the small currents.
  • a pressure can build up in the arc chamber 7, which is kept relatively small, which, after the blowing nozzle 6 has been released by the movable contact piece 4, causes a flow into the blow-out chamber 21 which is sufficient to extinguish the arc. If, in the event of an interruption, the current carried in the arc exceeds this first limit, the pressure in the arc space 7 also rises above the response value of the inlet pressure relief valves 10. In this case, the pressure which is decisive for blowing the arc becomes in the two spaces, in the arc space 7 and built up in the pressure storage chamber 9. The discharge of the pressure storage space 9 takes place practically without pressure drop via the outlet check valve 12 as soon as the opening of the blowing nozzle 6 is free.
  • the response pressure of the inlet pressure relief valves can be adapted to the preselected current values and thus an optimal extinguishing of the switching arc can be achieved in the entire current range.
  • the mode of operation of the compressed gas switch shown in FIG. 2 is similar to that described above.
  • the two pressure storage spaces 14 and 15 are pneumatically connected in series.
  • the inlet pressure relief valve 16 responds via a first current limit and also the inlet pressure relief valve 17 of the second pressure storage space 15 via a second current limit.
  • the discharge of the pressure storage spaces takes place via the outlet check valves 18 and 19 with practically no pressure drop with a free blowing nozzle opening.
  • the latter, adjacent to the arc chamber 7 outlet check valve 18 consists of several tangential flap valves arranged on the circumference, which cause an advantageous for the arc quenching tangential A flow of the gas.
  • the cooling of the hot gas flowing into the pressure storage spaces 14 and 15 is favored by the cast aluminum wall 22.
  • This Aluminiumgußwandung also allows the admission of higher pressure values in the pressure accumulator chambers 14, 15, and Lichtbo g enraum 7, which means leads to smaller switch sizes, and thus economic benefits.

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

Abstract

1. Gas-blast circuit-breaker having a fixed (2) and a movable (4) contact member which can be made to engage and disengage with one another, with a blow nozzle (6) which is releasable by the movable contact member (4) in the course of the circuit breaking movement, the blow nozzle (6) on the inlet side being connected to an arcing chamber (7) which is connected to a pressure accumulator chamber (8, 9 ; 14, 15) via at least one inlet-pressure relief valve (10, 11 ; 16, 17), characterized in that the pressure accumulator chamber (8, 9 ; 14, 15) connected to the arcing chamber (7) via at least one inlet pressure relief valve (10, 11 ; 16, 17), has at least one outlet non-return valve (12, 13 ; 18, 19) connecting the pressure accumulator chamber (8, 9 ; 14, 15) with the arcing chamber (7) and that at least one such pressure accumulator chamber (8, 9 ; 14, 15) is provided.

Description

Die vorliegende Erfindung betrifft einen Druckgasschalter mit einem festen und einem beweglichen Kontaktstück, die in und außer Eingriff miteinander bringbar sind, mit einer durch das bewegliche Kontaktstück im Zuge der Ausschaltbewegung freigebbaren Blasdüse, die sich einlaßseitig an einem Lichtbogenraum anschließt, wobei der Lichtbogenraum über mindestens ein Einlaß-Überdruckventil mit einem Druckspeicherraum in Verbindung steht (siehe z. B. DE-A-2 741 022).The present invention relates to a gas pressure switch with a fixed and a movable contact piece which can be brought into and out of engagement with one another, with a blowing nozzle which can be released by the movable contact piece in the course of the switch-off movement and which adjoins an arc chamber on the inlet side, the arc chamber having at least one Inlet pressure relief valve is connected to a pressure storage chamber (see, for example, DE-A-2 741 022).

Auch aus der CH-AS 596 662 ist ein Druckgasschalter der eingangs erwähnten Art bekannt. Bei dieser Anordnung mündet der mit einem federbelasteten Freikolben ausgerüstete Druckspeicherraum in einen zwischen dem Lichtbogenraum und der Blasdüse gebildeten Spalt. Dieser Druckgasschalter ist aus relativ vielen Teilen zusammengebaut und ist wirtschaftlich nachteilig.A pressure gas switch of the type mentioned at the outset is also known from CH-AS 596 662. In this arrangement, the pressure accumulator chamber equipped with a spring-loaded free piston opens into a gap formed between the arc chamber and the blow nozzle. This gas pressure switch is assembled from a relatively large number of parts and is economically disadvantageous.

Aus der CH-AS 306479 ist ein weiterer Druckgasschalter mit einem festen und einem beweglichen Kontaktstück, die in und außer Eingriff miteinander bringbar sind, bekannt. Bei diesem Druckgasschalter ist auch eine durch das bewegliche Kontaktstück im Zuge der Ausschaltbewegung freigebbare Blasdüse vorgesehen, die einlaßseitig mit einem nur das feste Kontaktstück und Kühlbleche enthaltenden Lichtbogenraum in Verbindung steht. Um im Lichtbogenraum nicht zu hohe, den Schalter gefährdende Druckwerte zu erhalten, muß die Größe des Lichtbogenraumes auf den größten zu löschenden Strom ausgerichtet sein. Für die Unterbrechung hoher Ströme muß daher ein relativ großer Lichtbogenraum vorhanden sein. Bei der Unterbrechung relativ kleiner, insbesondere kapazitiver oder induktiver Ströme mit dem gleichen Schalter kann sich dabei im relativ großen Lichtbogenraum nur ein relativ kleiner Druck aufbauen. Dieser relativ kleine Druck reicht für die Unterhaltung einer für die Lichtbogenlöschung erforderliche Löschmittelströmung durch die Blasdüse nicht aus. Dieser Schalter ist daher nur für einen relativ kleinen Strombereich geeignet.From CH-AS 306479 a further pressure gas switch with a fixed and a movable contact piece, which can be brought into and out of engagement with each other, is known. In this gas pressure switch there is also a blowing nozzle which can be released by the movable contact piece in the course of the switching-off movement and which is connected on the inlet side to an arc chamber containing only the fixed contact piece and cooling plates. In order not to get too high pressure values in the arcing space that endanger the switch, the size of the arcing space must be aligned with the largest current to be extinguished. A relatively large arc space must therefore be available for the interruption of high currents. When relatively small, in particular capacitive or inductive currents are interrupted with the same switch, only a relatively small pressure can build up in the relatively large arcing space. This relatively low pressure is not sufficient to maintain an extinguishing agent flow through the blowing nozzle that is required for arc extinguishing. This switch is therefore only suitable for a relatively small current range.

Aufgabe der Erfindung ist es, einen Druckgasschalter anzugeben, der wirtschaftlich vorteilhaft ist und sowohl für die Unterbrechung von kleinen als auch von in der Praxis vorkommenden größten Strömen geeignet ist.The object of the invention is to provide a gas pressure switch which is economically advantageous and is suitable for the interruption of both small and large currents occurring in practice.

Die gestellte Aufgabe ist dadurch gelöst, daß der mit dem Lichtbogenraum über mindestens ein Einlaß-Überdruckventil in Verbindung stehende Druckspeicherraum mindestens ein den Druckspeicherraum mit dem Lichtbogenraum verbindendes Auslaß-Rückschlagventil aufweist und daß mindestens ein solcher Druckspeicherraum vorhanden ist.The object is achieved in that the pressure accumulator space connected to the arc space via at least one inlet pressure relief valve has at least one outlet check valve connecting the pressure accumulator space to the arc space and that at least one such pressure accumulator space is present.

Vorteilhafterweise sind mehrere für mindestens zwei unterschiedliche, durch die Einlaß-Überdruckventile gegebene Druckwerte bestimmte Druckspeicherräume vorgesehen.Advantageously, several pressure storage spaces are provided for at least two different pressure values given by the inlet pressure relief valves.

Die Druckspeicherräume können pneumatisch parallel oder in Reihe geschaltet sein, wobei bei einer Reihenschaltung der in bezug auf den benachbarten Druckspeicherraum für einen kleineren Druckwert vorgesehene Druckspeicherraum dem Lichtbogenraum näher liegt.The pressure storage spaces can be connected pneumatically in parallel or in series, the pressure storage space provided for a smaller pressure value in relation to the adjacent pressure storage space being closer to the arc space in a series connection.

Die Druckspeicherräume können aber auch sowohl in Reihe als auch parallel geschaltet sein.The pressure storage spaces can also be connected both in series and in parallel.

Vorzugsweise sind die mit dem Lichtbogenraum benachbarten Auslaß-Rückschlagventile tangentiale Flatterventile, die eine tangentiale Einströmung des Gases aus dem Druckspeicherraum in den Lichtbogenraum bewirken.The outlet check valves adjacent to the arc space are preferably tangential flap valves which cause the gas to flow in tangentially from the pressure storage space into the arc space.

Die Druckspeicherräume und der Lichtbogenraum können mit aus Metall bestehenden Verstärkungs- und Kühlwänden ausgerüstet sein.The pressure storage spaces and the arc space can be equipped with reinforcement and cooling walls made of metal.

Ausführungsbeispiele des vorgeschlagenen Druckgasschalters sind nachstehend anhand der Zeichnungen näher erläutert. Es zeigt

  • Fig. 1 einen schematischen Axialschnitt eines Druckgasschalters mit mehreren pneumatisch parallel und
  • Fig.2 mit mehreren pneumatisch in Reihe geschalteten Druckspeicherräumen.
Exemplary embodiments of the proposed gas pressure switch are explained in more detail below with reference to the drawings. It shows
  • Fig. 1 shows a schematic axial section of a gas pressure switch with several pneumatically parallel and
  • Fig.2 with several pneumatically connected pressure storage rooms.

Der in Fig. 1 dargestellte Druckgasschalter weist ein mit einem elektronegativen Gas, z. B. mit Schwefelhexafluorid, gefülltes, aus Isolierstoff bestehendes Gehäuse 1 auf, das das mit dem einen Anschluß des Schalters verbundene, feste Kontaktstück 2 trägt. Dem festen Kontaktstück ist ein Abbrandring 3 aus Graphit vorgelagert. Das bewegliche Kontaktstück 4 wird bei einer Ausschaltbewegung durch einen nicht dargestellten Antrieb im mit dem anderen Anschluß des Schalters verbundenen Gleitkontakt 5 nach unten gezogen. Die aus Isolierstoff bestehende Blasdüse 6 ist im Gehäuse 1 befestigt. Die Blasdüse 6 steht einlaßseitig mit dem Lichtbogenraum 7 in Verbindung. Es sind zwei Druckspeicherräume 8 und 9 vorgesehen, die mit den Einlaß-Überdruckventilen 10 und 11 und mit den Auslaß-Rückschlagventilen 12 und 13 abgeschlossen sind. Die Druckspeicherräume 8 und 9 können durch radiale, in der Fig. 1 nicht dargestellte Zwischenwände unterteilt sein. Bei unterteilten Druckspeicherräumen können die segmentförmigen Teilräume für unterschiedliche Druckwerte vorgesehen sein. In diesem Fall weisen die Einlaß-Überdruckventile der einzelnen segmentförmigen Teilräume verschiedene Ansprechdruckwerte auf. In den Druckspeicherräumen können auch z. B. aus Kupferblechen bestehende Kühlrippen eingebaut sein.The pressure gas switch shown in Fig. 1 has a with an electronegative gas, for. B. with sulfur hexafluoride, filled, consisting of insulating material 1, which carries the fixed contact piece 2 connected to the one terminal of the switch. A burning ring 3 made of graphite is placed in front of the fixed contact piece. The movable contact piece 4 is pulled down during a switch-off movement by a drive, not shown, in the sliding contact 5 connected to the other connection of the switch. The blowing nozzle 6 made of insulating material is fastened in the housing 1. The blowing nozzle 6 is connected to the arc chamber 7 on the inlet side. There are two pressure storage spaces 8 and 9, which are closed with the inlet pressure relief valves 10 and 11 and with the outlet check valves 12 and 13. The pressure storage spaces 8 and 9 can be divided by radial partition walls, not shown in FIG. 1. In the case of subdivided pressure storage spaces, the segment-shaped partial spaces can be provided for different pressure values. In this case, the inlet pressure relief valves of the individual segment-shaped subspaces have different response pressure values. In the pressure storage spaces, for. B. existing cooling fins made of copper sheets.

Bei dem in Fig. aufgezeichneten Druckgasschalter sind funktionell sich entsprechende Bestandteile mit den gleichen Bezugsziffern bezeichnet, wie in Fig. 1, auch wenn sie nicht exakt dieselbe Formgebung aufweisen sollten. Es sind zwei pneumatisch in Reihe geschaltete Druckspeicherräume 14 und 15 vorhanden, die mit den Einlaß-Überdruckventilen 16 und 17 und mit den Auslaß-Rückschlagventilen 18 und 19 abgeschlossen sind. Das Auslaß-Rückschlagventil 18 ist ein tangentiales Flatterventil, wie auch aus der kleinen Skizze 20 in der Draufsicht ersichtlich ist. Die Druckspeicherräume 14 und 15 weisen aus Metall bestehende Verstärkungs-und Kühlwände 22 auf. Bei dieser Anordnung können die ringförmigen Druckspeicherräume 14, 15 auch durch radiale oder andere Wände in einzelne Teilräume unterteilt werden. Bei einer solchen Anordnung entstehen mehrere pneumatisch parallel und in Reihe geschaltete Druckspeicherräume. Durch Abstufung der Ansprechdruckwerte der zu den einzelnen Teilräumen gehörenden Einlaß-Überdruckventile ist eine gute Anpassung der erforderlichen Druckspeicherräume an den zu unterbrechenden Strom möglich.In the compressed gas switch recorded in FIG. 1, correspondingly functionally corresponding components are designated with the same reference numbers as in FIG. 1, even if they should not have exactly the same shape. There are two pneumatically connected pressure storage spaces 14 and 15, the are completed with the inlet pressure relief valves 16 and 17 and with the outlet check valves 18 and 19. The outlet check valve 18 is a tangential flap valve, as can also be seen from the small sketch 20 in the top view. The pressure storage spaces 14 and 15 have reinforcement and cooling walls 22 made of metal. In this arrangement, the annular pressure storage spaces 14, 15 can also be divided into individual subspaces by radial or other walls. With such an arrangement, several pressure storage spaces connected in parallel and in series are created. By grading the response pressure values of the inlet pressure relief valves belonging to the individual subspaces, a good adaptation of the required pressure storage spaces to the flow to be interrupted is possible.

Die Wirkungsweise der anhand der beiden Figuren beschriebenen Druckgasschalter ist folgende: Bei einer Ausschaltbewegung wird das bewegliche Schaltstück 4 in der in Fig. 1 dargestellten Anordnung nach unten gezogen. Zwischen dem festen Kontaktstück 2, resp. dem Abbrandring 3 und dem beweglichen Schaltstück 4 entsteht nach der Kontakttrennung ein Lichtbogen. Die dabei entstehenden heißen und stark ionisierten Gase strömen in den Lichtbogenraum und verursachen dort in Abhängigkeit des zu unterbrechenden Stromes eine Druckerhöhung. Die Einlaß-Überdruckventile 10 haben einen geringeren Ansprechdruck als die gegenüberliegenden Einlaß-Überdruckventile 11. Demnach wird bis zu einer ersten Stromgrenze kein Einlaß-Überdruckventil ansprechen. Dieser Strombereich ist für die kleinen Ströme vorgesehen. Im relativ klein gehaltenen Lichtbogenraum 7 kann sich ein Druck aufbauen, der nach Freigeben der Blasdüse 6 durch das bewegliche Kontaktstück 4 eine für die Löschung des Lichtbogens ausreichende Strömung in den Ausblasraum 21 verursacht. Wenn der im Lichtbogen geführte Strom bei einer Unterbrechung diese erste Grenze übersteigt, steigt auch der Druck im Lichtbogenraum 7 über den Ansprechswert der Einlaß-Überdruckventile 10. In diesem Fall wird der für die Blasung des Lichtbogens maßgebende Druck in den beiden Räumen, im Lichtbogenraum 7 und im Druckspeicherraum 9, aufgebaut. Die Entladung des Druckspeicherraumes 9 erfolgt praktisch ohne Druckabfall über das Auslaß-Rückschlagventil 12, sobald die Öffnung der Blasdüse 6 frei ist. Bei noch größeren Stromwerten stehen alle drei Räume 7, 8 und 9 für die Druckspeicherung zur Verfügung. Bei mehreren Druckspeicherräumen kann man den Ansprechdruck der Einlaß-Überdruckventile den vorgewählten Stromwerten anpassen und so im ganzen Strombereich eine optimale Löschung des Schaltlichtbogens erreichen.The mode of operation of the compressed gas switch described with reference to the two figures is as follows: During a switch-off movement, the movable contact piece 4 is pulled downward in the arrangement shown in FIG. 1. Between the fixed contact piece 2, respectively. the erosion ring 3 and the movable contact piece 4, an arc arises after the contact separation. The resulting hot and strongly ionized gases flow into the arc chamber and cause a pressure increase there depending on the current to be interrupted. The inlet pressure relief valves 10 have a lower response pressure than the opposite inlet pressure relief valves 11. Accordingly, up to a first current limit, no inlet pressure relief valve will respond. This current range is intended for the small currents. A pressure can build up in the arc chamber 7, which is kept relatively small, which, after the blowing nozzle 6 has been released by the movable contact piece 4, causes a flow into the blow-out chamber 21 which is sufficient to extinguish the arc. If, in the event of an interruption, the current carried in the arc exceeds this first limit, the pressure in the arc space 7 also rises above the response value of the inlet pressure relief valves 10. In this case, the pressure which is decisive for blowing the arc becomes in the two spaces, in the arc space 7 and built up in the pressure storage chamber 9. The discharge of the pressure storage space 9 takes place practically without pressure drop via the outlet check valve 12 as soon as the opening of the blowing nozzle 6 is free. If the current values are even higher, all three rooms 7, 8 and 9 are available for pressure storage. In the case of several pressure accumulator rooms, the response pressure of the inlet pressure relief valves can be adapted to the preselected current values and thus an optimal extinguishing of the switching arc can be achieved in the entire current range.

Die Wirkungsweise des in Fig. 2 dargestellten Druckgasschalters ist ähnlich wie vorhergehend beschrieben. Hier sind jedoch die beiden Druckspeicherräume 14 und 15 pneumatisch in Reihe geschaltet. Über eine erste Stromgrenze spricht das Einlaß-Überdruckventil 16 und über eine zweite Stromgrenze auch das Einlaß-Überdruckventil 17 des zweiten Druckspeicherraumes 15 an. Die Entladung der Druckspeicherräume erfolgt über die Auslaß-Rückschlagventile 18 und 19 praktisch ohne Druckabfall bei freier Blasdüsenöffnung. Das letztere, an den Lichtbogenraum 7 grenzende Auslaß-Rückschlagventil 18 besteht aus mehreren am Umfang angeordneten tangentialen Flatterventilen, die eine für die Lichtbogenlöschung vorteilhafte tangentiale Ein strömung des Gases bewirken. Die Kühlung des in die Druckspeicherräume 14 und 15 einströmenden, heißen Gases wird durch die Aluminiumgußwandung 22 begünstigt. Diese Aluminiumgußwandung erlaubt außerdem die Zulassung höherer Druckwerte in den Druckspeicherräumen 14, 15, und im Lichtbogenraum 7, was zu kleineren Schalterabmessungen führt und somit wirtschaftliche Vorteile bedeutet.The mode of operation of the compressed gas switch shown in FIG. 2 is similar to that described above. Here, however, the two pressure storage spaces 14 and 15 are pneumatically connected in series. The inlet pressure relief valve 16 responds via a first current limit and also the inlet pressure relief valve 17 of the second pressure storage space 15 via a second current limit. The discharge of the pressure storage spaces takes place via the outlet check valves 18 and 19 with practically no pressure drop with a free blowing nozzle opening. The latter, adjacent to the arc chamber 7 outlet check valve 18 consists of several tangential flap valves arranged on the circumference, which cause an advantageous for the arc quenching tangential A flow of the gas. The cooling of the hot gas flowing into the pressure storage spaces 14 and 15 is favored by the cast aluminum wall 22. This Aluminiumgußwandung also allows the admission of higher pressure values in the pressure accumulator chambers 14, 15, and Lichtbo g enraum 7, which means leads to smaller switch sizes, and thus economic benefits.

Claims (7)

1. Gas-blast circuit-breaker having a fixed (2) and a movable (4) contact member which can be made to engage and disengage with one another, with a blow nozzle (6) which is releasable by the movable contact member (4) in the course of the circuit breaking movement, the blow nozzle (6) on the inlet side being connected to an arcing chamber (7) which is connected to a pressure accumulator chamber (8, 9; 14, 15) via at least one inlet-pressure relief valve (10, 11; 16, 17), characterised in that the pressure accumulator chamber (8, 9; 14, 15) connected to the arcing chamber (7) via at least one inlet pressure relief valve (10, 11; 16, 17) has at least one outlet non-return valve (12, 13; 18, 19) connecting the pressure accumulator chamber (8, 9; 14, 15) with the arcing chamber (7) and that at least one such pressure accumulator chamber (8, 9; 14, 15) is provided.
2. Gas-blast circuit-breaker according to Claim 1, characterised in that several pressure accumulator chambers (8, 9; 14, 15) for at least two different pressure values determined by the inlet pressure relief valves (10, 11; 16, 17) are provided.
3. Gas-blast circuit-breaker according to Claim 2, characterised in that the pressure accumulator chambers (8, 9) are pneumatically connected in parallel.
4. Gas-blast circuit-breaker according to Claim 2, characterised in that the pressure accumulator chambers (14, 15) are pneumatically connected in series, and the pressure accumulator chamber (14) intended for a lower pressure value than that of the adjacent pressure accumulator chamber (15) is situated closer to the arcing chamber (7).
5. Gas-blast circuit-breaker according to Claims 3 and 4, characterised in that the pressure accumulator chambers are pneumatically connected in series as well as in parallel.
6. Gas-blast circuit-breaker according to one of the preceding claims, characterised in that the outlet non-return valves (18) adjacent to the arcing chamber (7) are tangential float valves which cause the gas to flow tangentially out of the pressure accumulator chamber (14) into the arcing chamber (7).
7. Gas-blast circuit-breaker according to one of the preceding claims, characterised in that the pressure accumulator chambers (14, 15) and the arcing chamber (7) are fitted with metal reinforcing and cooling walls (22).
EP80103499A 1980-01-25 1980-06-23 Gas-blast circuit-breaker Expired EP0033355B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103499T ATE4354T1 (en) 1980-01-25 1980-06-23 GAS SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH597/80 1980-01-25
CH597/80A CH649416A5 (en) 1980-01-25 1980-01-25 EXHAUST GAS SWITCH.

Publications (2)

Publication Number Publication Date
EP0033355A1 EP0033355A1 (en) 1981-08-12
EP0033355B1 true EP0033355B1 (en) 1983-07-27

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EP80103499A Expired EP0033355B1 (en) 1980-01-25 1980-06-23 Gas-blast circuit-breaker

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EP (1) EP0033355B1 (en)
AT (1) ATE4354T1 (en)
CH (1) CH649416A5 (en)
DE (1) DE3064395D1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3425633A1 (en) * 1984-06-07 1985-12-12 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau EXHAUST GAS SWITCH
DE3440212A1 (en) * 1984-10-10 1986-04-17 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau EXHAUST GAS SWITCH
NO855379L (en) * 1985-02-27 1986-08-28 Bbc Brown Boveri & Cie PRESSURE GAS SWITCH.
FR2651065B1 (en) * 1989-08-18 1996-07-05 Alsthom Gec SELF-BLOWING MEDIUM VOLTAGE CIRCUIT BREAKER
DE4412249A1 (en) * 1994-04-06 1995-10-12 Siemens Ag Electrical high-voltage circuit breaker with a boiler room and a compression room
DE19816509B4 (en) * 1998-04-14 2006-08-10 Abb Schweiz Ag consumable
US8150543B2 (en) 2007-09-28 2012-04-03 Siemens Aktiengesellschaft Methods, apparatus and articles for an air jet loom

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DE689851C (en) * 1934-07-31 1940-04-05 Frida Strauss Geb Ruppel Liquid-free switch with arc extinguishing by flowing pressurized gas
DE2507163A1 (en) * 1974-03-27 1975-10-09 Bbc Brown Boveri & Cie SWITCH WITH INSULATING GAS
CH571763A5 (en) * 1974-07-24 1976-01-15 Sprecher & Schuh Ag Temperature-compensated piston-operated pressure gas switch - uses heat sink for switching cylinders to equalize temperature conditions
CH596662A5 (en) * 1976-06-24 1978-03-15 Sprecher & Schuh Ag Compressed gas circuit breaker
DE2741022A1 (en) * 1976-10-20 1978-05-03 Bbc Brown Boveri & Cie GAS SWITCH WITH SELF-EXHAUST
DE2801401A1 (en) * 1977-07-26 1979-02-08 Sprecher & Schuh Ag PRESSURE GAS SWITCH

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US3588407A (en) * 1967-07-31 1971-06-28 Westinghouse Electric Corp Puffer piston gas blast circuit interrupter with insulating nozzle member and valve acting hollow contacts

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689851C (en) * 1934-07-31 1940-04-05 Frida Strauss Geb Ruppel Liquid-free switch with arc extinguishing by flowing pressurized gas
DE2507163A1 (en) * 1974-03-27 1975-10-09 Bbc Brown Boveri & Cie SWITCH WITH INSULATING GAS
CH571763A5 (en) * 1974-07-24 1976-01-15 Sprecher & Schuh Ag Temperature-compensated piston-operated pressure gas switch - uses heat sink for switching cylinders to equalize temperature conditions
CH596662A5 (en) * 1976-06-24 1978-03-15 Sprecher & Schuh Ag Compressed gas circuit breaker
DE2741022A1 (en) * 1976-10-20 1978-05-03 Bbc Brown Boveri & Cie GAS SWITCH WITH SELF-EXHAUST
DE2801401A1 (en) * 1977-07-26 1979-02-08 Sprecher & Schuh Ag PRESSURE GAS SWITCH

Also Published As

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DE3064395D1 (en) 1983-09-01
ATE4354T1 (en) 1983-08-15
CH649416A5 (en) 1985-05-15
EP0033355A1 (en) 1981-08-12

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