WO1997000530A1 - Electrical compressed gas power switch - Google Patents

Electrical compressed gas power switch Download PDF

Info

Publication number
WO1997000530A1
WO1997000530A1 PCT/DE1996/001106 DE9601106W WO9700530A1 WO 1997000530 A1 WO1997000530 A1 WO 1997000530A1 DE 9601106 W DE9601106 W DE 9601106W WO 9700530 A1 WO9700530 A1 WO 9700530A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact piece
contact
compressed gas
contact element
insulating unit
Prior art date
Application number
PCT/DE1996/001106
Other languages
German (de)
French (fr)
Inventor
Edelhard Kynast
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1997000530A1 publication Critical patent/WO1997000530A1/en

Links

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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
    • H01H33/7053—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle having a bridging element around two hollow tubular contacts

Definitions

  • the invention relates to an electrical compressed gas circuit breaker for high voltage with two coaxial contact pieces, at least one of which can be driven and with an insulating part which is connected to a first one of the contact pieces and which gas-tightly seals the second contact piece when it is switched on engages, delimits a compressed gas space in which the extinguishing gas is pressurized when switching off and runs off the second contact piece during the switching-off movement.
  • Such an electrical compressed gas circuit breaker is known for example from E 0 221 838 B1.
  • the insulating part has a blow cylinder which allows the extinguishing gas compressed in a compression space to flow radially inward through openings into an arc space between the contact pieces.
  • Residual charges that lie on the surface of the insulating part flashovers occur towards the fixed contact piece and the dielectric strengthening of the isolating path can be hindered.
  • the present invention is therefore based on the object of designing a circuit breaker of the type mentioned at the outset in such a way that the reconsolidation of the isolating section is supported and that the switching arc drawn between the contact pieces is reliably extinguished.
  • the object is achieved according to the invention in that the second contact piece has a taper in the end region facing the insulating material part in the switch-off state, so that a gap is formed between the insulating contact part and the insulating material part before the axial covering of the second contact piece is removed.
  • the outlet point of the insulating material part from the second contact piece is thus arranged in the area of the second contact piece in which the latter tapers and optionally forms a shoulder.
  • This area is located at an axial distance from the end of the second contact piece facing the isolating section, in an area with a low electrical field strength that is not subjected to high dielectric stress.
  • Pressurized quenching gas flows out of the pressurized gas space through the gap occurring in the last phase of the switching-off process, as a result of which flashovers in this area between the insulating material part and the second contact piece are prevented and this area is dielectrically consolidated. Any arc that might arise here would be blown out by the extinguishing gas flowing out through the gap.
  • the quenching gas is blown from the compressed gas space into the arc space between the contact pieces in order to extinguish the switching arc.
  • An advantageous embodiment of the invention provides that the outer diameter of the second contact piece in the the first contact piece facing end region corresponds to the outer diameter of a third contact piece and that the second and the third contact piece are bridged in the switched-on state by a coaxially surrounding first contact piece (bridging contact piece).
  • a bridging contact piece can be used which has the same cross-section in its contact area with the third contact piece as in the contact area with the second contact piece.
  • the shoulder on which the outer diameter of the second contact piece increases can serve as a stop for the bridging contact piece during the switching-on process.
  • the taper of the second contact piece can also be designed conically. This can be used to increase the contact pressure between the first and second contact pieces in the switched-on state.
  • the second contact piece is also advantageously hollow for the discharge of extinguishing gas.
  • the figure shows schematically in a longitudinal section a part of a circuit breaker with the contact pieces and the insulating part.
  • the first contact piece 1 is designed as a bridging contact piece and is movable in the axial direction.
  • the bridging contact piece 1 consists, in a manner known per se, of individual, mutually axially extending and distributed on the circumference of the fixed contact piece 3, resiliently pressed radially inwardly.
  • the two contact pieces 2, 3 are coaxially opposite one another at a fixed distance.
  • the contact lamellae of the first contact piece 1 are contained in a tube 4, which is connected to a cylindrical blowing grille 5.
  • the blow grille 5 is formed by a cylindrical body which has passages for the extinguishing gas which is compressed in the compression space 6 by moving the compression cylinder 7 in the direction of the arrow 8 and flows radially inward into the arc space 9.
  • the inventive design of the second contact piece 2 with an end region 11, which has an outside diameter that is reduced beyond a shoulder 14, has the following effect: the stationary compression piston 15 and the compression chamber 6 formed in the direction of the arrow 8, the compression chamber 6 compresses the extinguishing gas located there, for example SF ⁇ , and after the contact piece 10 of the bridging contact piece has run off from the contact piece 2 through the passages of the blow grille 5 into the Arc chamber 9 blown.
  • annular gap 16 is cleared between the fixed contact piece 2 and the insulating material part 5, 7 13 through which quenching gas can flow out of the arc chamber. Due to the extinguishing gas flowing through this annular gap 16, the separating distance between the fixed contact piece 2 and the insulating material part 5, 7, 13 is dielectrically strengthened there. Flashovers between these components, which initiate further flashovers or can leave conductive traces on the insulating material part 5, 7, 13, are thus prevented.
  • the outlet point of the insulating material part 5, 7, 13 from the second contact piece 2 is thus arranged in the region of the second contact piece in which it tapers and optionally forms a shoulder 14. This area is located at an axial distance from the end of the second contact piece 2 facing the isolating section, in a region with little electric field strength and a low electric field strength.

Landscapes

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

Abstract

An electrical compressed gas power switch for high voltages has two coaxial contact elements (1, 2) at least one of which (the bridging contact element) can be driven, and an insulating unit (5, 7, 13) which is connected to the bridging contact element, grips around the second contact element (2) when in closed-circuit condition so as to form a gas-tight seal, and defines a compressed gas chamber (6). The second contact element (2) has a tapering section in its end region (11), ensuring that, before the axial grip around the second contact piece (2) by the insulating element (5, 7, 13) is broken, a gap (16) is created between the second contact element and insulating unit through which quenching gas from the compressed gas chamber (6) can flow in order dielectrically to stabilize the intermediate space between the insulating unit and second contact element (2) and dielectrically to unload the drain point of the insulating unit and the second contact element.

Description

Beschreibungdescription
Elektrischer Druckgas-LeistungsschalterElectric compressed gas circuit breaker
Die Erfindung bezieht sich auf einen elektrischen Druckgas- Leistungsschalter für Hochspannung mit zwei koaxialen Kon¬ taktstücken von denen wenigstens eines antreibbar ist und mit einem Isolierstoffteil, welches mit einem ersten der Kon¬ taktstücke verbunden ist, und welches das zweite Kontaktstück im Einschaltzustand gasdicht um¬ greift, einen Druckgasraum begrenzt, in dem Löschgas beim Ausschalten unter Druck gesetzt wird und während der Ausschaltbewegung von dem zweiten Kontaktstück abläuft.The invention relates to an electrical compressed gas circuit breaker for high voltage with two coaxial contact pieces, at least one of which can be driven and with an insulating part which is connected to a first one of the contact pieces and which gas-tightly seals the second contact piece when it is switched on engages, delimits a compressed gas space in which the extinguishing gas is pressurized when switching off and runs off the second contact piece during the switching-off movement.
Ein derartiger elektrischer Druckgas-Leistungsschalter ist beispielsweise aus der E 0 221 838 Bl bekannt. Bei dem be¬ kannten Leistungsschalter weist das Isolierstoffteil einen Blaszylinder auf, der das in einem Kompressionsraum kompri¬ mierte Löschgas durch Öffnungen radial nach innen in einen Lichtbogenraum zwischen den Kontaktstücken einströmen läßt.Such an electrical compressed gas circuit breaker is known for example from E 0 221 838 B1. In the known circuit breaker, the insulating part has a blow cylinder which allows the extinguishing gas compressed in a compression space to flow radially inward through openings into an arc space between the contact pieces.
Nachdem das Isolierstoffteil beim Ausschaltvorgang von dem feststehenden Kontaktstück abgelaufen ist, können durchAfter the insulating part has expired from the stationary contact piece during the switch-off process, you can by
Restladungen, die auf der Oberfläche des Isolierstoffteils liegen, Überschläge zum feststehenden Kontaktstück hin auf¬ treten und die dielektrische Verfestigung der Trennstrecke kann behindert werden.Residual charges that lie on the surface of the insulating part, flashovers occur towards the fixed contact piece and the dielectric strengthening of the isolating path can be hindered.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen Leistungsschalter der eingangs genannten Art so zu ge¬ stalten, daß die Wiederverfestigung der Trennstrecke unter¬ stützt wird und daß der zwischen den Kontaktstücken gezogene Schaltlichtbogen sicher gelöscht wird. Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das zweite Kontaktstück in dem dem Isolierstoffteil im Ausschalt¬ zustand zugewandten Endbereich eine Verjüngung aufweist, so daß vor Aufhebung der axialen Oberdeckung des zweiten Kon- taktstückes mit dem Isolierstoffteil zwischen diesen ein Spalt entsteht.The present invention is therefore based on the object of designing a circuit breaker of the type mentioned at the outset in such a way that the reconsolidation of the isolating section is supported and that the switching arc drawn between the contact pieces is reliably extinguished. The object is achieved according to the invention in that the second contact piece has a taper in the end region facing the insulating material part in the switch-off state, so that a gap is formed between the insulating contact part and the insulating material part before the axial covering of the second contact piece is removed.
Der Ablaufpunkt des Isolierstoffteils von dem zweiten Kon¬ taktstück wird somit in dem Bereich des zweiten Kontaktstücks angeordnet, in dem dieses sich verjüngt und gegebenenfalls eine Schulter bildet. Dieser Bereich befindet sich in einem axialen Abstand von dem der Trennstrecke zugewandten Ende des zweiten Kontaktstύcks, in einem dielektrisch wenig bean¬ spruchten Bereich mit geringer elektrischer Feldstärke.The outlet point of the insulating material part from the second contact piece is thus arranged in the area of the second contact piece in which the latter tapers and optionally forms a shoulder. This area is located at an axial distance from the end of the second contact piece facing the isolating section, in an area with a low electrical field strength that is not subjected to high dielectric stress.
Beim Ablaufen eines Isolierstoffkörpers von einem Kontakt¬ stück ergeben sich im Normalfall wegen des kurzzeitig auftretenden schmalen Spaltes punktuell erhöhte dielektrische Belastungen. Diese werden bei der vorliegenden Konstruktion in einen Bereich verlagert, wo sie keine kritischen Werte erreichen.When an insulating material body runs off from a contact piece, there are normally punctually increased dielectric loads due to the narrow gap which occurs for a short time. In the present design, these are moved to an area where they do not reach critical values.
Durch den in der letzten Phase des Ausschaltvorganges auftre¬ tenden Spalt strömt unter Druck gesetztes Löschgas aus dem Druckgasraum aus, wodurch Oberschläge in diesem Bereich zwi¬ schen dem Isolierstoffteil und dem zweiten Kontaktstück ver¬ hindert werden und dieser Bereich dielektrisch verfestigt wird. Ein eventuell hier entstehender Lichtbogen würde durch das durch den Spalt abströmende Löschgas ausgeblasen.Pressurized quenching gas flows out of the pressurized gas space through the gap occurring in the last phase of the switching-off process, as a result of which flashovers in this area between the insulating material part and the second contact piece are prevented and this area is dielectrically consolidated. Any arc that might arise here would be blown out by the extinguishing gas flowing out through the gap.
Gleichzeitig wird aus dem Druckgasraum das Löschgas in den Lichtbogenraum zwischen den Kontaktstücken geblasen, um dort den Schaltlichtbogen zu löschen.At the same time, the quenching gas is blown from the compressed gas space into the arc space between the contact pieces in order to extinguish the switching arc.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Außendurchmesser des zweiten Kontaktstückes in dessen dem ersten Kontaktstück zugewandten Endbereich dem Außendurchmes¬ ser eines dritten Kontaktstückes entspricht und daß das zwei¬ te und das dritte Kontaktstück im Einschaltzustand von einem beide koaxial umgebenden ersten Kontaktstück (Oberbrückungs- kontaktstück) überbrückt werden.An advantageous embodiment of the invention provides that the outer diameter of the second contact piece in the the first contact piece facing end region corresponds to the outer diameter of a third contact piece and that the second and the third contact piece are bridged in the switched-on state by a coaxially surrounding first contact piece (bridging contact piece).
Durch diese Konstruktion kann ein Überbrückungskontaktstück verwendet werden, das in seinem Kontaktbereich mit dem drit¬ ten Kontaktstück denselben Querschnitt aufweist, wie in dem Kontaktbereich mit dem zweiten Kontaktstück. Außerdem kann die Schulter, an der sich der Außendurchmesser des zweiten Kontaktstückes vergrößert, als Anschlag für das Über¬ brückungskontaktstück beim Einschaltvorgang dienen.With this construction, a bridging contact piece can be used which has the same cross-section in its contact area with the third contact piece as in the contact area with the second contact piece. In addition, the shoulder on which the outer diameter of the second contact piece increases can serve as a stop for the bridging contact piece during the switching-on process.
Die Verjüngung des zweiten KontaktStücks kann auch konisch gestaltet sein. Dies kann für eine Kontaktdruckerhöhung zwischen dem ersten und zweiten Kontaktstück im Einschalt- zustand benutzt werden.The taper of the second contact piece can also be designed conically. This can be used to increase the contact pressure between the first and second contact pieces in the switched-on state.
Das zweite Kontaktstück ist außerdem vorteilhaft zum Abströmen von Löschgas hohl ausgebildet.The second contact piece is also advantageously hollow for the discharge of extinguishing gas.
Im folgenden wird die Erfindung anhand eines Ausfuhrungsbei¬ spiels in einer Zeichnung gezeigt und anschließend beschrie- ben.In the following, the invention is shown in a drawing based on an exemplary embodiment and is subsequently described.
Dabei stellt die Figur schematisch in einem Längsschnitt einen Teil eines Leistungsschalters mit den Kontaktstücken und dem Isolierstoffteil dar.The figure shows schematically in a longitudinal section a part of a circuit breaker with the contact pieces and the insulating part.
Das erste Kontaktstück 1 ist als Überbrückungskontaktstück ausgebildet und in axialer Richtung beweglich. Das Über¬ brückungskontaktstück 1 besteht in an sich bekannter Art aus einzelnen, jeweils axial verlaufenden und am Umfang des fest- stehenden KontaktStückes 3 verteilten, federnd radial nach innen gedrückten Kontaktlamellen. Die beiden Kontaktstücke 2, 3 stehen einander in festem Ab¬ stand koaxial gegenüber.The first contact piece 1 is designed as a bridging contact piece and is movable in the axial direction. The bridging contact piece 1 consists, in a manner known per se, of individual, mutually axially extending and distributed on the circumference of the fixed contact piece 3, resiliently pressed radially inwardly. The two contact pieces 2, 3 are coaxially opposite one another at a fixed distance.
Die Kontaktlamellen des ersten Kontaktstückes 1 sind in einem Rohr 4 gefaßt, das mit einem zylindrischen Blasgitter 5 ver¬ bunden ist. Das Blasgitter 5 ist durch einen zylindrischen Körper gebildet, der Durchlässe für das Löschgas aufweist, welches in dem Kompressionsraum 6 durch Bewegung des Kom- pressionszylinders 7 in Richtung des Pfeiles 8 komprimiert wird und radial nach innen in den Lichtbogenraum 9 einströmt.The contact lamellae of the first contact piece 1 are contained in a tube 4, which is connected to a cylindrical blowing grille 5. The blow grille 5 is formed by a cylindrical body which has passages for the extinguishing gas which is compressed in the compression space 6 by moving the compression cylinder 7 in the direction of the arrow 8 and flows radially inward into the arc space 9.
Nach dem Ablaufen des Kontaktes 10 der Kontaktlamelle des er¬ sten Kontakstückes 1 von dem feststehenden Kontaktstück 2 wird ein Lichtbogen in dem Lichtbogenraum 9 gezogen, der durch Beblasung mit dem unter Druck gesetzten Löschgas nach dem nächsten Stromnulldurchgang gelöscht wird.After the contact 10 of the contact lamella of the first contact piece 1 has expired from the fixed contact piece 2, an arc is drawn in the arc space 9, which is extinguished by blowing with the pressurized quenching gas after the next zero current passage.
Die erfinderische Ausgestaltung des zweiten Kontaktstückes 2 mit einem Endbereich 11, der einen jenseits einer Schulter 14 verminderten Außendurchmesser aufweist, hat folgende Wirkung: Bis zum Ablaufen der Kontaktlippe 12 des Kompressionszylin¬ derbodens 13 von dem Kontaktstück 2 im Bereich der Schulter 14 wird in dem zwischen dem feststehenden Kompressionskolben 15 und dem in Richtung des Pfeiles 8 bewegten Kompressionszy¬ linder 7 gebildeten Kompressionsraum 6 das dort befindliche Löschgas, beispielsweise SFÖ komprimiert und nach dem Ablau¬ fen des Kontaktstückes 10 des Überbrückungskontaktstückes von dem Kontaktstück 2 durch die Durchlässe des Blasgitters 5 in den Lichtbogenraum 9 eingeblasen.The inventive design of the second contact piece 2 with an end region 11, which has an outside diameter that is reduced beyond a shoulder 14, has the following effect: the stationary compression piston 15 and the compression chamber 6 formed in the direction of the arrow 8, the compression chamber 6 compresses the extinguishing gas located there, for example SFÖ, and after the contact piece 10 of the bridging contact piece has run off from the contact piece 2 through the passages of the blow grille 5 into the Arc chamber 9 blown.
Von dem Zeitpunkt des Ablaufens der Dichtlippe 12 von der Schulter 14 an wird ein Ringspalt 16 zwischen dem festehenden Kontaktstück 2 und dem Isolierstoffteil 5, 7 13 frei, durch den Löschgas aus dem Lichtbogenraum abströmen kann. Durch das durch diesen Ringspalt 16 abströmende Löschgas wird dort die Trennstrecke zwischen dem feststehenden Kontaktstück 2 und dem Isolierstoffteil 5, 7, 13 dielektrisch verfestigt. Überschläge zwischen diesen Bauteilen, die weitere Über- schlage initiieren bzw. leitfähige Spuren auf dem Isolier¬ stoffteil 5, 7, 13 hinterlassen können, werden somit ver¬ hindert.From the time the sealing lip 12 runs off the shoulder 14, an annular gap 16 is cleared between the fixed contact piece 2 and the insulating material part 5, 7 13 through which quenching gas can flow out of the arc chamber. Due to the extinguishing gas flowing through this annular gap 16, the separating distance between the fixed contact piece 2 and the insulating material part 5, 7, 13 is dielectrically strengthened there. Flashovers between these components, which initiate further flashovers or can leave conductive traces on the insulating material part 5, 7, 13, are thus prevented.
Der Ablaufpunkt des Isolierstoffteils 5, 7, 13 von dem zweiten Kontaktstück 2 wird somit in dem Bereich des zweiten Kontaktstücks angeordnet, in dem dieses sich verjüngt und gegebenenfalls eine Schulter 14 bildet. Dieser Bereich befindet sich in einem axialen Abstand von dem der Trenn¬ strecke zugewandten Ende des zweiten Kontaktstücks 2, in einem dielektrisch wenig beanspruchten Bereich mit geringer elektrischer Feldstärke.The outlet point of the insulating material part 5, 7, 13 from the second contact piece 2 is thus arranged in the region of the second contact piece in which it tapers and optionally forms a shoulder 14. This area is located at an axial distance from the end of the second contact piece 2 facing the isolating section, in a region with little electric field strength and a low electric field strength.
Beim Ablaufen eines Isolierstoffkörpers 5, 7, 13 von einem Kontaktstück 2 ergeben sich im Normalfall wegen des kurz- zeitig auftretenden, schmalen Spaltes punktuell erhöhte dielektrische Belastungen. Diese werden bei der vorliegenden Konstruktion in einen Bereich verlagert, wo sie keine kriti¬ schen Werte erreichen. When an insulating material body 5, 7, 13 drains from a contact piece 2, there are normally punctually increased dielectric loads due to the narrow gap which occurs for a short time. In the present construction, these are shifted to an area where they do not reach critical values.

Claims

Patentansprüche claims
1. Elektrischer Druckgas-Leistungsschalter für Hochspannung mit zwei koaxialen Kontaktstücken (1, 2), von denen wenig- stens eines antreibbar ist und mit einem Isolierstoffteil (5, 7, 13), welches mit einem ersten (1) der Kontaktstücke ver¬ bunden ist, und welches das zweite Kontaktstück (2) im Einschaltzustand gasdicht um¬ greift, einen Druckgasraum (6) begrenzt, in dem Löschgas beim Ausschalten unter Druck gesetzt wird und während der Ausschaltbewegung von dem zweiten Kontaktstück (2) abläuft, d a d u r c h g e k e n n z e i c h n e t , daß das zweite Kontaktstύck (2) in dem Isolierstoffteil (5, 7,1. Electrical compressed gas circuit breaker for high voltage with two coaxial contact pieces (1, 2), at least one of which can be driven and with an insulating part (5, 7, 13) which is connected to a first (1) of the contact pieces , and which grips the second contact (2) in a gas-tight manner when it is switched on, delimits a compressed gas chamber (6) in which the extinguishing gas is pressurized when it is switched off and runs off the second contact (2) during the switching-off movement, characterized in that second contact piece (2) in the insulating part (5, 7,
13) im Ausschaltzustand zugewandten Endbereich (11) eine Ver¬ jüngung aufweist, so daß vor Aufhebung der axialen Über¬ deckung des zweiten KontaktStückes (2) mit dem Isolierstoff- teil (5, 7, 13) zwischen diesen ein Spalt (16) entsteht.13) has a taper when the end region (11) is switched off, so that a gap (16) is formed between the second contact piece (2) and the insulating part (5, 7, 13) before the axial overlap .
2. Elektrischer Druckgas-Leistungsschalter nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Außendurchmesser des zweiten Kontaktstückes (2) in dessen dem ersten Kontaktstück (1) zugewandten Endbereich (11) dem Außendurchmesser eines dritten Kontaktstückes (3) entspricht und daß das zweite (2) und das dritte (3) Kontaktstück im Einschaltzustand von einem beide koaxial umgebenden ersten Kontaktstück (1) (Überbrückungskontaktstück) überbrückt wer¬ den. 2. Electrical compressed gas circuit breaker according to claim 1, characterized in that the outer diameter of the second contact piece (2) in its end region (11) facing the first contact piece (1) corresponds to the outer diameter of a third contact piece (3) and that the second (2) and the third (3) contact piece in the switched-on state is bridged by a first contact piece (1) (bridging contact piece) surrounding both coaxially.
PCT/DE1996/001106 1995-06-16 1996-06-12 Electrical compressed gas power switch WO1997000530A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995122581 DE19522581C1 (en) 1995-06-16 1995-06-16 High voltage pressurised gas switch
DE19522581.3 1995-06-16

Publications (1)

Publication Number Publication Date
WO1997000530A1 true WO1997000530A1 (en) 1997-01-03

Family

ID=7764916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001106 WO1997000530A1 (en) 1995-06-16 1996-06-12 Electrical compressed gas power switch

Country Status (2)

Country Link
DE (1) DE19522581C1 (en)
WO (1) WO1997000530A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3140466A1 (en) * 1980-12-23 1982-07-29 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau High-voltage power circuit breaker
US4342890A (en) * 1979-04-24 1982-08-03 Sprecher & Schuh Ag Gas-blast switch
EP0306439A1 (en) * 1987-09-01 1989-03-08 Siemens Aktiengesellschaft Gas blast electical switch
US4939322A (en) * 1988-03-25 1990-07-03 Hitachi, Ltd. Puffer type circuit breaker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538955A1 (en) * 1985-10-29 1987-05-07 Siemens Ag EXHAUST GAS SWITCH

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342890A (en) * 1979-04-24 1982-08-03 Sprecher & Schuh Ag Gas-blast switch
DE3140466A1 (en) * 1980-12-23 1982-07-29 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau High-voltage power circuit breaker
EP0306439A1 (en) * 1987-09-01 1989-03-08 Siemens Aktiengesellschaft Gas blast electical switch
US4939322A (en) * 1988-03-25 1990-07-03 Hitachi, Ltd. Puffer type circuit breaker

Also Published As

Publication number Publication date
DE19522581C1 (en) 1996-09-19

Similar Documents

Publication Publication Date Title
DE19958645C2 (en) Hybrid circuit breakers
WO2006066428A1 (en) Contact system for an electrical switching device
EP1306868B1 (en) High voltage power circuit breaker with insulating nozzle
EP0016983A1 (en) Puffer-type gas circuit breaker
DE2600683A1 (en) VACUUM DISCONNECTOR
EP1226597B1 (en) Compressed gas-blast circuit breaker
CH662903A5 (en) GAS-INSULATED LOAD DISCONNECTOR.
EP0743665B1 (en) Circuit breaker
DE4405206A1 (en) Switching device
EP0744759B1 (en) H.T. circuit breaker with a fixed heating chamber
EP3948912B1 (en) Medium voltage load break switch
DE1122134B (en) Circuit breaker
WO1997000530A1 (en) Electrical compressed gas power switch
DE4200896A1 (en) HV power switch with compression cylinder - has screen which surrounds constant current contact on metal cylinder cover when switched on.
EP1913621A1 (en) Self-blast circuit breaker with control body
DE4402123C2 (en) High voltage circuit breaker with a boiler room
EP0734580A1 (en) High-voltage power switch with a field electrode
DE3113325C2 (en)
DE3323865C2 (en) High-voltage switching chamber
DE19724759C1 (en) High voltage power switch
EP0664551A2 (en) H.T. electrical circuit breaker with a heating chamber and a compression device
DE19715313C1 (en) HV circuit-breaker with gas-blast arc extinction
DE3140466A1 (en) High-voltage power circuit breaker
DE19715314C1 (en) HV circuit breaker with contact device
WO1995008836A1 (en) Gas pressure switch

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase