EP0160853A2 - Compressed-gas circuit breaker - Google Patents

Compressed-gas circuit breaker Download PDF

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Publication number
EP0160853A2
EP0160853A2 EP85104380A EP85104380A EP0160853A2 EP 0160853 A2 EP0160853 A2 EP 0160853A2 EP 85104380 A EP85104380 A EP 85104380A EP 85104380 A EP85104380 A EP 85104380A EP 0160853 A2 EP0160853 A2 EP 0160853A2
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EP
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Prior art keywords
chamber
switch according
openings
switching
annular gap
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EP85104380A
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German (de)
French (fr)
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EP0160853B2 (en
EP0160853A3 (en
EP0160853B1 (en
Inventor
Friedrich Dr. Pinnekamp
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BBC Brown Boveri AG Switzerland
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BBC Brown Boveri AG Switzerland
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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 invention is based on a gas pressure switch according to the preamble of claim 1.
  • the invention relates to a prior art of gas pressure switches, as described in EP-AI 0 067 460.
  • the quenching gas heated by the switching arc is stored in a toroidal heating chamber which coaxially surrounds the switching pieces and flows into an annular space when the heating effect of the arc diminishes when the current zero crossing is approached.
  • this annular space it is mixed with fresh extinguishing gas from a piston-cylinder compression device, so that the mixed gas has a lower temperature than the heated extinguishing gas.
  • the extinguishing gas which has been mixed down to a comparatively low temperature, is then directed into the switching path located between the two contact pieces, where it is the switching light blown bow effectively.
  • such a switch is relatively complex and also requires additional drive energy to drive the compression device.
  • the invention achieves the object of specifying a compressed gas switch of the generic type in which the extinguishing gas used for the dielectric reconsolidation of the switching path is available at a gas temperature which saves a compression device at the end of the high current phase, which is very considerable is below the temperature of the heated extinguishing gas.
  • the compressed gas switch according to the invention is characterized in that the heated extinguishing gas and the cool extinguishing gas stored in the heating chamber before the switching process are mixed almost optimally, so that sufficiently cooled extinguishing gas is available for the dielectric re-solidification of the switching path after the zero current passage.
  • a heating chamber which is advantageous for cost considerations and design reasons and which extends predominantly in the axial direction.
  • the single figure shows a plan view of a compressed gas switch designed according to the invention and cut along its switching piece axis.
  • the pressure gas switch designed according to the invention is shown in the left-hand part in the switched-on position, but in the right-hand part during switching off.
  • a housing filled with an extinguishing gas such as sulfur hexafluoride at a pressure of a few bar.
  • this housing 1 there is a switching piece 2 designed as a fixed nozzle tube, into which a movable, fully cylindrical switching piece 3 is inserted in the switched-on position.
  • the switching piece 3 passes through an opening (not designated) of an insulating material body 4 which is designed as a nozzle and which is attached to the switching piece 2.
  • the heating chamber 5 In the insulating body 4 there is a heating chamber 5 surrounding the switching pieces 2 and 3 in a toroidal shape, which is delimited on the inside by the switching piece 2 and has an annular gap 6 between the insulating body 4 and the upper end of the switching piece 2, which in the switched-on position by the switching piece 3 is separated from the inside of the switching piece 2.
  • the heating chamber has an extension L in the axial direction which is several times greater than its depth D in the radial direction.
  • the chamber 8 is enclosed by the chamber 9 and is connected to it via openings 10 in the partition 8.
  • the chamber 8 has a comparatively small depth in the radial direction and opens into the annular gap 6.
  • the openings 10 are arranged on circles running azimuthally about the contact piece axis, the center distances of which from one another extend approximately in the radial direction in the axial direction th depth d of the outer chamber 9 correspond.
  • this switch When switching off (right part of the figure), the switching piece 3 is moved upwards. As soon as switching elements 2 and 3 separate, a switching arc 11 forms between them. In the high current phase, the switching arc heats up the extinguishing gas in the switching path between switching elements 2 and 3, causing its pressure to rise. The heated quenching gas of high pressure flows through the annular gap 6, which is comparatively large compared to the opening of the switching element 2, into the heating chamber 5 and is guided there in the chamber 8 along the partition wall 7 to the upper and lower ends of the chamber 6 delimited by the insulating body 4.
  • a particularly favorable course of the flow is achieved when the radial depth of the first chamber 8 at least partially decreases in the axial direction from the mouth of the annular gap 6.
  • the flow cross section of the chamber 8 can even be kept considerably smaller than the flow cross section of the annular gap 6, since in In this case, the extinguishing gas flow is divided into two approximately equal partial flows, which move along the partition 7 towards the upper and lower ends of the chamber 8.
  • the heated extinguishing gas guided along the partition 7 mixes only insignificantly with the cool extinguishing gas located in the chamber 8 and, while increasing the pressure, essentially pushes it through the openings 10 into the outer chamber 9.
  • the openings 10 are dimensioned such that the pressure equalization between the chambers 8 and 9 takes place very quickly even when the extinguishing gas is heated up strongly as a result of high currents to be interrupted. Accordingly, it is generally sufficient if the partition 7 is at most a few millimeters thick.
  • a favorable distribution of the inflowing heated extinguishing gas is achieved when the flow cross-section of the defections 10 arranged on an azimuthally extending circle around the cylinder axis is approximately equal to the flow cross-section of the chamber 8 at the axial position of the chamber 8 assigned to this circle.
  • the heated extinguishing gas flows through the openings 10 into the chamber 9, where it mixes with the extinguishing gas located there before the pressure equalization.
  • Mixing limits 12, 13 and 14 between cool and mixed extinguishing gas migrate into the chamber 9 from the openings 10.
  • the openings located on azimuthally running around the cylinder axis can be evenly spaced from each other, but can also be designed as a gap running azimuthally around the cylinder axis.
  • the partition 10 can then be fastened by means of webs which extend radially outwards to the wall of the insulating body 4 which limits the heating chamber 5 to the outside.
  • the cooled, quenching gas mixed in the chamber 9 flows through the openings 10 via the ring channel-like chamber 8 and the ring channel 6 back into the switching path and interrupts the arc 11.
  • the quality of the quenching gas acting on the switching path is thereby further improved that when it flows out of the openings 10 there is an additional mixing with the unmixed and therefore hot quenching gas located in the chamber 8.

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  • Circuit Breakers (AREA)

Abstract

1. Compressed gas circuit-breaker having two cylindrical switch parts (2, 3) movable in relation to one another along the cylinder axis, and having, for receiving extinction gas, a heating chamber (5) coaxially surrounding the switch parts (2, 3) and extending in the axial direction longer than in the radial direction, which extinction gas is heated during a switching operation by a switch arc (11) burning between the two switch parts (2, 3), is fed via an annular gap (6) into the heating chamber (5), and is there mixed with cool extinction gas, characterized in that the heating chamber (5) is divided by a partition wall (7) arranged coaxially with respect to the switch parts (2, 3) into two chambers (8, 9) of toroidal design, of which a first (8) of the two chambers (8, 9) is connected to the annular gap (6), and a second (9) of the two chambers (8, 9) is connected via openings (10) in the partition wall (7) to the first chamber (8).

Description

Bei der Erfindung wird ausgegangen von einem Druckgasschalter nach dem Oberbegriff von Patentanspruch 1.The invention is based on a gas pressure switch according to the preamble of claim 1.

Mit diesem Oberbegriff nimmt die Erfindung auf einen Stand der Technik von Druckgasschaltern Bezug, wie er in der EP-AI 0 067 460 beschrieben ist. Beim bekannten Schalter wird das vom Schaltlichtbogen erhitzte Löschgas in einer die Schaltstücke koaxial umgebenden, toroidal ausgebildeten Heizkammer gespeichert und strömt, wenn die Heizwirkung des Lichtbogens bei Annäherung an den Stromnulldurchgang nachlässt, in einen Ringraum. In diesem Ringraum wird es mit frischem Löschgas aus einer Kolben-Zylinder-Kompressionsvorrichtung gemischt, so dass das gemischte Gas eine niedrigere Temperatur als das erhitzte Löschgas aufweist. Das auf eine vergleichsweise niedrige Temperatur herabgemischte Löschgas wird anschliessend in die zwischen beiden Schaltstücken befindliche Schaltstrecke geleitet, wo es den Schaltlichtbogen wirkungsvoll bebläst. Ein solcher Schalter ist jedoch verhältnismässig aufwendig und benötigt zudem für den Antrieb der Kompressionsvorrichtung zusätzliche Antriebsenergie.With this preamble, the invention relates to a prior art of gas pressure switches, as described in EP-AI 0 067 460. In the known switch, the quenching gas heated by the switching arc is stored in a toroidal heating chamber which coaxially surrounds the switching pieces and flows into an annular space when the heating effect of the arc diminishes when the current zero crossing is approached. In this annular space it is mixed with fresh extinguishing gas from a piston-cylinder compression device, so that the mixed gas has a lower temperature than the heated extinguishing gas. The extinguishing gas, which has been mixed down to a comparatively low temperature, is then directed into the switching path located between the two contact pieces, where it is the switching light blown bow effectively. However, such a switch is relatively complex and also requires additional drive energy to drive the compression device.

Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, einen Druckgasschalter der gattungsgemässen Art anzugeben, bei dem das zur dielektrischen Wiederverfestigung der Schaltstrecke verwendete Löschgas unter Einsparung einer Kompressionsvorrichtung am Ende der Hochstromphase bei einer Gastemperatur zur Verfügung steht, welche ganz erheblich unter der Temperatur des aufgeheizten Löschgases liegt.The invention, as characterized in the claims, achieves the object of specifying a compressed gas switch of the generic type in which the extinguishing gas used for the dielectric reconsolidation of the switching path is available at a gas temperature which saves a compression device at the end of the high current phase, which is very considerable is below the temperature of the heated extinguishing gas.

Die Aufgabe wird in Verbindung mit den Merkmalen des Oberbegriffs gemäss dem kennzeichnenden Teil des Anspruchs 1 gelöst. Der erfindungsgemässe Druckgasschalter zeichnet sich dadurch aus, dass das erhitzte Löschgas und das in der Heizkammer vor dem Schaltvorgang gespeicherte kühle Löschgas nahezu optimal vermischt werden, wodurch für die dielektrische Wiederverfestigung der Schaltstrecke nach den Stromnulldurchgang ausreichend gekühltes Löschgas zur Verfügung steht. Gleichzeitig ist es möglich, eine aus Kostenerwägungen und Konstruktionsgründen vorteilhafte, vorwiegend in axialer Richtung erstreckte Heizkammer zu verwenden.The object is achieved in connection with the features of the preamble according to the characterizing part of claim 1. The compressed gas switch according to the invention is characterized in that the heated extinguishing gas and the cool extinguishing gas stored in the heating chamber before the switching process are mixed almost optimally, so that sufficiently cooled extinguishing gas is available for the dielectric re-solidification of the switching path after the zero current passage. At the same time, it is possible to use a heating chamber which is advantageous for cost considerations and design reasons and which extends predominantly in the axial direction.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels beschrieben.The invention is described below with reference to an embodiment shown in the drawing.

Hierbei zeigt die einzige Figur eine Aufsicht auf einen längs seiner Schaltstückachse geschnittenen, erfindungsgemäss ausgebildeten Druckgasschalter.Here, the single figure shows a plan view of a compressed gas switch designed according to the invention and cut along its switching piece axis.

In der Figur ist der erfindungsgemäss ausgebildete Druckgasschalter im linken Teil in der Einschaltstellung angegeben, hingegen im rechten Teil während des Ausschaltens. Hierbei ist ein mit einem Löschgas, wie etwa Schwefelhexafluorid von einigen bar Druck, gefülltes Gehäuse mit 1 bezeichnet. In diesem Gehäuse 1 befindet sich ein als feststehendes Düsenrohr ausgebildetes Schaltstück 2, in welches in der Einschaltstellung ein bewegliches, vollzylindrisches Schaltstück 3 eingefahren ist. Das Schaltstück 3 durchsetzt in der Einschaltstellung eine nicht bezeichnete Oeffnung eines als Düse ausgebildeten Isolierstoffkörpers 4, welcher am Schaltstück 2 angebracht ist. Im Isolierstoffkörper 4 ist eine die Schaltstücke 2 und 3 toroidförmig umgebende Heizkammer 5 ausgespart, welche an ihrer Innenseite vom Schaltstück 2 begrenzt wird und zwischen dem Isolierstoffkörper 4 und dem oberen Ende des Schaltstückes 2 ein Ringspalt 6 aufweist, welcher in der Einschaltstellung durch das Schaltstück 3 vom Inneren des Schaltstückes 2 abgetrennt ist. Die Heizkammer weist in axialer Richtung eine Erstreckung L auf, welche um ein Mehrfaches grösser ist als deren Tiefe D in radialer Richtung.In the figure, the pressure gas switch designed according to the invention is shown in the left-hand part in the switched-on position, but in the right-hand part during switching off. Here, a housing filled with an extinguishing gas, such as sulfur hexafluoride at a pressure of a few bar, is designated by 1. In this housing 1 there is a switching piece 2 designed as a fixed nozzle tube, into which a movable, fully cylindrical switching piece 3 is inserted in the switched-on position. In the switched-on position, the switching piece 3 passes through an opening (not designated) of an insulating material body 4 which is designed as a nozzle and which is attached to the switching piece 2. In the insulating body 4 there is a heating chamber 5 surrounding the switching pieces 2 and 3 in a toroidal shape, which is delimited on the inside by the switching piece 2 and has an annular gap 6 between the insulating body 4 and the upper end of the switching piece 2, which in the switched-on position by the switching piece 3 is separated from the inside of the switching piece 2. The heating chamber has an extension L in the axial direction which is several times greater than its depth D in the radial direction.

Im Inneren der Heizkammer 5 ist eine die Schaltstücke 2, 3 koaxial umgebende, zylindermantelförmige Trennwand 7 aus isolierendem Material, wie etwa Polytetrafluoräthylen, angebracht, welche die Heizkammer 5 in zwei Kammern 8 und 9 unterteilt. Beide Kammern sind torusförmig ausgebildet. Die Kammer 8 ist von der Kammer 9 umschlossen und ist mit dieser über Oeffnungen 10 in der Trennwand 8 verbunden. Die Kammer 8 weist gegenüber der Kammer 9 eine vergleichsweise geringe Tiefe in radialer Richtung auf und mündet in den Ringspalt 6. Die Oeffnungen 10 sind auf azimutal um die Schaltstückachse verlaufenden Kreisen angeordnet, deren Mittelpunktsabstände voneinander in axialer Richtung etwa der in radialer Richtung erstreckten Tiefe d der aussenliegenden Kammer 9 entsprechen.In the interior of the heating chamber 5, a switching jacket 2, 3 coaxially surrounding, cylindrical jacket-shaped partition 7 made of insulating material, such as polytetrafluoroethylene, is attached, which divides the heating chamber 5 into two chambers 8 and 9. Both chambers are toroidal. The chamber 8 is enclosed by the chamber 9 and is connected to it via openings 10 in the partition 8. Compared to the chamber 9, the chamber 8 has a comparatively small depth in the radial direction and opens into the annular gap 6. The openings 10 are arranged on circles running azimuthally about the contact piece axis, the center distances of which from one another extend approximately in the radial direction in the axial direction th depth d of the outer chamber 9 correspond.

Die Wirkungsweise dieses Schalters ist wie folgt: Beim Ausschalten (rechter Teil der Figur) wird das Schaltstück 3 nach oben bewegt. Sobald sich die Schaltstücke 2 und 3 trennen, bildet sich zwischen Ihnen ein Schaltlichtbogen 11. Der Schaltlichtbogen heizt in der Hochstromphase das in der Schaltstrecke zwischen den Schaltstücken 2 und 3 befindliche Löschgas stark auf, wodurch dessen Druck ansteigt. Das erhitzte Löschgas hohen Druckes strömt durch den gegenüber der Oeffnung des Schaltstückes 2 vergleichsweise grossen Ringspalt 6 in die Heizkammer 5 und wird dort in der Kammer 8 längs der Trennwand 7 zum vom Isolierstoffkörper 4 begrenzten oberen und unteren Ende der Kammer 6 geführt.The operation of this switch is as follows: When switching off (right part of the figure), the switching piece 3 is moved upwards. As soon as switching elements 2 and 3 separate, a switching arc 11 forms between them. In the high current phase, the switching arc heats up the extinguishing gas in the switching path between switching elements 2 and 3, causing its pressure to rise. The heated quenching gas of high pressure flows through the annular gap 6, which is comparatively large compared to the opening of the switching element 2, into the heating chamber 5 and is guided there in the chamber 8 along the partition wall 7 to the upper and lower ends of the chamber 6 delimited by the insulating body 4.

Der Strömungsquerschnitt der als Ringkanal ausgebildeten Kammer 8 braucht nicht grösser als der Strömungsquerschnitt des Ringspaltes 6 zu sein, da dann im allgemeinen gewährleistet ist, dass die durch Pfeile dargestellte Strömung des aufgeheizten Löschgases im wesentlichen widerstandsfrei erfolgt. Ein besonders günstiger Verlauf der Strömung wird dann erreicht, wenn die radiale Tiefe der ersten Kammer 8 von der Einmündung des Ringspaltes 6 in axialer Richtung zumindest teilweise abnimmt. Befindet sich der als Eintrittsöffnung der Heizkammer 5 wirkende Ringspalt 6 ungefähr gleich weit vom oberen und unteren Ende der Heizkammer 5 bzw. der Kammer 8 entfernt, so kann der Strömungsquerschnitt der Kammer 8 sogar erheblich kleiner als der Strömungsquerschnitt des Ringspaltes 6 gehalten sein, da in diesem Fall die löschgasströmung in zwei annähernd gleich grosse Teilströme aufgeteilt wird, welche sich längs der Trennwand 7 zum oberen und unteren Ende der Kammer 8 hin bewegen.The flow cross section of the chamber 8, which is designed as an annular channel, need not be greater than the flow cross section of the annular gap 6, since this generally ensures that the flow of the heated extinguishing gas represented by arrows takes place essentially without resistance. A particularly favorable course of the flow is achieved when the radial depth of the first chamber 8 at least partially decreases in the axial direction from the mouth of the annular gap 6. If the annular gap 6 acting as the inlet opening of the heating chamber 5 is approximately equidistant from the upper and lower ends of the heating chamber 5 or the chamber 8, the flow cross section of the chamber 8 can even be kept considerably smaller than the flow cross section of the annular gap 6, since in In this case, the extinguishing gas flow is divided into two approximately equal partial flows, which move along the partition 7 towards the upper and lower ends of the chamber 8.

Das längs der Trennwand 7 geführte erhitzte Löschgas mischt sich nur unwesentlich mit dem in der Kammer 8 befindlichen kühlen Löschgas und drängt dieses unter Druckerhöhung im wesentlichen durch die Oeffnungen 10 in die äussere Kammer 9. Die 0effnungen 10 sind hierbei so bemessen, dass der Druckausgleich zwischen den Kammern 8 und 9 auch bei starker Aufheizung des Löschgases infolge hoher zu unterbrechender Ströme sehr rasch erfolgt. Demzufolge reicht es im allgemeinen aus, wenn die Trennwand 7 höchstens einige Millimeter dick ist. Eine günstige Aufteilung des einströmenden aufgeheizten Löschgases wird dann erzielt, wenn der Strömungsquerschnitt der auf einem azimutal um die Zylinderachse verlaufenden Kreis angeordneten Deffnungen 10 ungefähr gleich ist dem Strömungsquerschnitt der Kammer 8 an der diesem Kreis zugeordneten axialen Position der Kammer 8.The heated extinguishing gas guided along the partition 7 mixes only insignificantly with the cool extinguishing gas located in the chamber 8 and, while increasing the pressure, essentially pushes it through the openings 10 into the outer chamber 9. The openings 10 are dimensioned such that the pressure equalization between the chambers 8 and 9 takes place very quickly even when the extinguishing gas is heated up strongly as a result of high currents to be interrupted. Accordingly, it is generally sufficient if the partition 7 is at most a few millimeters thick. A favorable distribution of the inflowing heated extinguishing gas is achieved when the flow cross-section of the defections 10 arranged on an azimuthally extending circle around the cylinder axis is approximately equal to the flow cross-section of the chamber 8 at the axial position of the chamber 8 assigned to this circle.

Bei weiterem Druckanstieg infolge Lichtbogenaufheizung strömt das erhitzte Löschgas über die Oeffnungen 10 in die Kammer 9 ein, wo es sich mit dem dort befindlichen Löschgas vor dem Druckausgleich mischt. Hierbei wandern von den Oeffnungen 10 Mischungsgrenzen 12, 13 und 14 zwischen kühlem und gemischtem Löschgas in die Kammer 9 hinein. Durch geeignete Verteilung der Oeffnungen 10 auf der Trennwand 7 wird erreicht, dass bei einer Heizkammer 5 von geringer radialer Tiefe D aber vergleichsweise grosser axialer Erstreckung L die Mischungsgrenzen beim Druckausgleich nahezu das gesamte Volumen der Kammer 9 überdecken.If the pressure rises further as a result of the heating of the arc, the heated extinguishing gas flows through the openings 10 into the chamber 9, where it mixes with the extinguishing gas located there before the pressure equalization. Mixing limits 12, 13 and 14 between cool and mixed extinguishing gas migrate into the chamber 9 from the openings 10. By a suitable distribution of the openings 10 on the partition 7, it is achieved that, in the case of a heating chamber 5 of a small radial depth D but a comparatively large axial extension L, the mixing limits during pressure equalization cover almost the entire volume of the chamber 9.

Hierbei haben Mischungsversuche ergeben, dass bei einer Heizkammer 5 mit einem Tiefen-Längen-Verhältnis D/L von ca. 0,1 das bei einem Schaltvorgang aufgeheizte Löschgas nahezu vollkommen mit dem in der Heizkammer 5 vorhandenen kühlen Löschgas vermischt wird, wenn die Abstände benachbarter Oeffnungen 10 etwa der Tiefe d der Kammer 9 entsprechen. Gegenüber einer Heizkammer mit vergleichbarer Abmessung D und L, jedoch ohne Trennwand, wird hierdurch die Vermischung nahezu verdoppelt. Bei Heizkammern mit einem D/L-Verhältnis von 0,5 ist bei entsprechend beabstandeter Anordnung der Oeffnungen 10 die Vermischung gegenüber einer entsprechend bemessenen Heizkammer immer noch erheblich verbessert. Die .auf azimutal um die Zylinderachse verlaufenden Kreisen befindlichen Oeffnungen können gleichmässig voneinander beabstandet sein, können aber auch als azimutal um die Zylinderachse verlaufender Spalt ausgebildet sein. Die Trennwand 10 kann dann mittels radial nach aussen erstreckter Stege an der die Heizkammer 5 nach aussen begrenzenden Wand des Isolierkörpers 4 befestigt sein.Mixing tests have shown that in a heating chamber 5 with a depth-to-length ratio D / L of approx. 0.1, the extinguishing gas heated up during a switching process is almost completely mixed with the cool extinguishing gas present in the heating chamber 5 if the distances are adjacent Openings 10 approximately the depth d correspond to the chamber 9. Compared to a heating chamber with comparable dimensions D and L, but without a partition, the mixing is almost doubled. In the case of heating chambers with a D / L ratio of 0.5, the mixing is still considerably improved compared to a correspondingly dimensioned heating chamber if the openings 10 are arranged at a corresponding distance. The openings located on azimuthally running around the cylinder axis can be evenly spaced from each other, but can also be designed as a gap running azimuthally around the cylinder axis. The partition 10 can then be fastened by means of webs which extend radially outwards to the wall of the insulating body 4 which limits the heating chamber 5 to the outside.

Nach der Hochstrdmphase strömt das in der Kammer 9 gemischte, gekühlte Löschgas durch die Oeffnungen 10 über die ringkanalartig ausgebildete Kammer 8 und den Ringkanal 6 zurück in die Schaltstrecke und unterbricht den Lichtbogen 11. Die Qualität des auf die Schaltstrecke einwirkenden Löschgases wird hierbei noch dadurch verbessert, dass bei dessen Ausströmen aus den Oeffnungen 10 eine zusätzliche Durchmischung mit dem in der Kammer 8 befindlichen unvermischten und daher heissen Löschgas stattfindet.After the high-current phase, the cooled, quenching gas mixed in the chamber 9 flows through the openings 10 via the ring channel-like chamber 8 and the ring channel 6 back into the switching path and interrupts the arc 11. The quality of the quenching gas acting on the switching path is thereby further improved that when it flows out of the openings 10 there is an additional mixing with the unmixed and therefore hot quenching gas located in the chamber 8.

Claims (10)

1. Druckgasschalter mit zwei zylinderförmigen, längs der Zylinderachse relativ zueinander beweglichen Schaltstücken (2, 3) und mit einer die Schaltstücke (2, 3) koaxial umgebenden, in axialer länger als in radialer Richtung erstreckten Heizkammer (5) zur Aufnahme von Löschgas, welches bei einem Schaltvorgang durch einen zwischen beiden Schaltstücken (2, 3) brennenden Schaltlichtbogen (11) aufgeheizt, über einen Ringspalt (6) in die Heizkammer (5) geführt und dort mit kühlem Löschgas gemischt wird, dadurch gekennzeichnet, dass die Heizkammer (5) durch eine koaxial zu den Schaltstücken (2, 3) angeordnete Trennwand (7) in zwei torusförmig ausgebildete Kammern (8, 9) unterteilt ist, von denen eine erste (8) beider Kammern (8, 9) mit dem Ringspalt (6) und eine zweite (9) beider Kammern (8, 9) über Oeffnungen (10) in der Trennwand (7) mit der ersten Kammer (8) verbunden ist.1.Gas switch with two cylindrical, along the cylinder axis relatively movable switching pieces (2, 3) and with one of the switching pieces (2, 3) surrounding coaxially, in the axially longer than in the radial direction, heating chamber (5) for receiving extinguishing gas, which during a switching process, heated by a switching arc (11) burning between the two switching elements (2, 3), led into the heating chamber (5) via an annular gap (6) and mixed there with cool extinguishing gas, characterized in that the heating chamber (5) is divided by a coaxial to the switching pieces (2, 3) partition (7) into two toroidal chambers (8, 9), of which a first (8) of both chambers (8, 9) with the annular gap (6) and a second (9) of both chambers (8, 9) is connected to the first chamber (8) via openings (10) in the partition (7). 2. Druckgasschalter nach Anspruch 1, dadurch gekennzeichnet, dass die erste Kammer (8) als axial erstreckter Ringkanal mit einer verglichen mit der zweiten Kammer (9) geringen radialen Tiefe ausgebildet ist.2. Gas pressure switch according to claim 1, characterized in that the first chamber (8) is designed as an axially extending annular channel with a small radial depth compared to the second chamber (9). 3. Druckgasschalter nach Anspruch 2, dadurch gekennzeichnet, dass der Ringspalt (6) ungefähr gleich weit von beiden Enden des Ringkanals entfernt in den Ringkanal mündet.3. Pressure gas switch according to claim 2, characterized in that the annular gap (6) opens approximately the same distance from both ends of the annular channel into the annular channel. 4. Druckgasschalter nach Anspruch 2, dadurch gekennzeichnet, dass der Ringspalt (6) an einem Ende des Ringkanals in den Ringkanal mündet.4. Gas switch according to claim 2, characterized in that the annular gap (6) opens into the annular channel at one end of the annular channel. 5. Druckgasschalter nach Anspruch 2, dadurch gekennzeichnet, dass die radiale Tiefe der ersten Kammer (8) von der Einmündung des Ringspaltes (6) in axialer Richtung gesehen zumindest teilweise abnimmt.5. Pressure gas switch according to claim 2, characterized in that the radial depth of the first chamber (8) at least partially decreases from the mouth of the annular gap (6) seen in the axial direction. 6. Druckgasschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Abstand benachbarter Oeffnungen (10) höchstens dem Doppelten der in radialer Richtung erstreckten Tiefe der zweiten Kammer (9) entspricht.6. Pressure gas switch according to one of claims 1 to 5, characterized in that the distance between adjacent openings (10) corresponds at most to twice the depth of the second chamber (9) extending in the radial direction. 7. Druckgasschalter nach Anspruch 6, dadurch gekennzeichnet, dass die Oeffnungen (10) auf azimutal um die Zylinderachse verlaufenden Kreisen angeordnet sind, deren Mittelpundtsabstände voneinander höchstens den Doppelten der in radialer Richtung erstreckten Tiefe (d) der zweiten Kammer (9) entspricht.7. Gas-blast switch according to claim 6, characterized in that the openings (10) are arranged on circles running azimuthally around the cylinder axis, the center point spacings of which correspond to at most twice the depth (d) of the second chamber (9) extending in the radial direction. 8. Druckgasschalter nach Anspruch 7, dadurch gekennzeichnet, dass die Oeffnungen (10) als azimutal um die Zylinderachse erstreckte Spalte ausgebildet sind.8. Pressure gas switch according to claim 7, characterized in that the openings (10) are designed as azimuthally extending around the cylinder axis column. 9. Druckgasschalter nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass der Strömungsquerschnitt aller auf einem azimutal um die Zylinderachse verlaufenden Kreis angeordneten Oeffnungen (10) ungefähr gleich ist dem Strömungsquerschnitt des Ringkanals (Kammer 8) an der diesem Kreis entsprechenden axialen Position des Ringkanals.9. Pressure gas switch according to one of claims 7 or 8, characterized in that the flow cross-section of all openings arranged on an azimuthally extending around the cylinder axis circle (10) is approximately the same as the flow cross-section of the ring channel (chamber 8) at the axial position corresponding to this circle Ring channel. 10. Druckgasschalter nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass der Abstand der Oeffnungen (10) in axialer Richtung etwa der in radialer Richtung erstreckten Tiefe (d) der zweiten Kammer (9) entspricht.10. Pressure gas switch according to one of claims 6 to 9, characterized in that the distance of the openings (10) in the axial direction corresponds approximately to the depth (d) of the second chamber (9) extending in the radial direction.
EP19850104380 1984-05-08 1985-04-11 Compressed-gas circuit breaker Expired - Lifetime EP0160853B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH224384 1984-05-08
CH2243/84 1984-05-08

Publications (4)

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EP0160853A2 true EP0160853A2 (en) 1985-11-13
EP0160853A3 EP0160853A3 (en) 1987-07-22
EP0160853B1 EP0160853B1 (en) 1989-11-29
EP0160853B2 EP0160853B2 (en) 1995-05-17

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EP19850104380 Expired - Lifetime EP0160853B2 (en) 1984-05-08 1985-04-11 Compressed-gas circuit breaker

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EP (1) EP0160853B2 (en)
JP (1) JPH0664976B2 (en)
DE (2) DE3421356A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015429A1 (en) * 1989-06-07 1990-12-13 Siemens Aktiengesellschaft Compressed gas switch
FR2715497A1 (en) * 1994-01-25 1995-07-28 Gec Alsthom T & D Sa Arc-extinguishing nozzle for circuit breaker chamber
DE102011007103A1 (en) * 2011-04-11 2012-10-11 Siemens Aktiengesellschaft Electrical switching device
CN112017904A (en) * 2019-05-28 2020-12-01 河南平芝高压开关有限公司 Circuit breaker and quiet side afterbody air current channel structure thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915700C3 (en) * 1989-05-13 1997-06-19 Aeg Energietechnik Gmbh Compressed gas switch with evaporative cooling
DE19512652C1 (en) * 1995-04-05 1996-10-31 Aeg Energietechnik Gmbh Pressurised-gas power switch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076494A5 (en) * 1970-01-16 1971-10-15 Alsthom Cgee
DE2633093A1 (en) * 1976-07-20 1978-01-26 Siemens Ag Switch containing closed volume of gas - has tubular movable contact and insulating head at its end aiding quenching of arc
FR2385214A1 (en) * 1977-03-24 1978-10-20 Mitsubishi Electric Corp CIRCUIT BREAKER
US4259555A (en) * 1977-03-24 1981-03-31 Mitsubishi Denki Kabushiki Kaisha Self-extinguishing gas circuit interrupter
US4264795A (en) * 1978-03-17 1981-04-28 Mitsubishi Denki Kabushiki Kaisha Switching device
FR2520928A1 (en) * 1982-02-04 1983-08-05 Alsthom Atlantique PNEUMATIC SELF-BLOWING CIRCUIT BREAKER

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH632609A5 (en) * 1977-03-24 1982-10-15 Mitsubishi Electric Corp Circuit breaker with lichtbogenloeschendem gas.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076494A5 (en) * 1970-01-16 1971-10-15 Alsthom Cgee
DE2633093A1 (en) * 1976-07-20 1978-01-26 Siemens Ag Switch containing closed volume of gas - has tubular movable contact and insulating head at its end aiding quenching of arc
FR2385214A1 (en) * 1977-03-24 1978-10-20 Mitsubishi Electric Corp CIRCUIT BREAKER
US4259555A (en) * 1977-03-24 1981-03-31 Mitsubishi Denki Kabushiki Kaisha Self-extinguishing gas circuit interrupter
US4264795A (en) * 1978-03-17 1981-04-28 Mitsubishi Denki Kabushiki Kaisha Switching device
FR2520928A1 (en) * 1982-02-04 1983-08-05 Alsthom Atlantique PNEUMATIC SELF-BLOWING CIRCUIT BREAKER

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015429A1 (en) * 1989-06-07 1990-12-13 Siemens Aktiengesellschaft Compressed gas switch
FR2715497A1 (en) * 1994-01-25 1995-07-28 Gec Alsthom T & D Sa Arc-extinguishing nozzle for circuit breaker chamber
DE102011007103A1 (en) * 2011-04-11 2012-10-11 Siemens Aktiengesellschaft Electrical switching device
CN112017904A (en) * 2019-05-28 2020-12-01 河南平芝高压开关有限公司 Circuit breaker and quiet side afterbody air current channel structure thereof
CN112017904B (en) * 2019-05-28 2022-08-12 河南平芝高压开关有限公司 Circuit breaker and quiet side afterbody air current channel structure thereof

Also Published As

Publication number Publication date
EP0160853B2 (en) 1995-05-17
JPS60243920A (en) 1985-12-03
DE3574520D1 (en) 1990-01-04
DE3421356A1 (en) 1985-11-14
EP0160853A3 (en) 1987-07-22
JPH0664976B2 (en) 1994-08-22
EP0160853B1 (en) 1989-11-29

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