EP0035581B1 - Disjoncteur à gaz comprimé - Google Patents

Disjoncteur à gaz comprimé Download PDF

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Publication number
EP0035581B1
EP0035581B1 EP80101206A EP80101206A EP0035581B1 EP 0035581 B1 EP0035581 B1 EP 0035581B1 EP 80101206 A EP80101206 A EP 80101206A EP 80101206 A EP80101206 A EP 80101206A EP 0035581 B1 EP0035581 B1 EP 0035581B1
Authority
EP
European Patent Office
Prior art keywords
chamber
gas
pump cylinder
movable contact
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80101206A
Other languages
German (de)
English (en)
Other versions
EP0035581A1 (fr
Inventor
Adrian W. Dr. Roth
Hans-Rudolf Wüthrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh AG
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 Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Priority to AT80101206T priority Critical patent/ATE5358T1/de
Priority to DE8080101206T priority patent/DE3065575D1/de
Priority to EP80101206A priority patent/EP0035581B1/fr
Priority to US06/183,428 priority patent/US4368367A/en
Priority to CA000361795A priority patent/CA1148594A/fr
Publication of EP0035581A1 publication Critical patent/EP0035581A1/fr
Application granted granted Critical
Publication of EP0035581B1 publication Critical patent/EP0035581B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/906—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism with pressure limitation in the compression volume, e.g. by valves or bleeder openings
    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/908—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume

Definitions

  • the invention relates to a gas pressure switch with a fixed and with a movable contact piece, which can be brought into and out of engagement with one another in a switching chamber, the switching chamber being connected to an expansion space on the one hand via a blowing nozzle which is closed by the movable contact piece in the switched-on position and on the other hand via a non-return valve opening towards the switching chamber is connected to the pressure side of a pump cylinder arranged in a stationary manner in the expansion space, to which a movable pump piston is assigned, which during "a switch-off stroke pressurizes the pump cylinder with a time delay.
  • Such a pressure gas switch is known for example from DE-A-27 50 762 (Fig. 2).
  • the desired time delay of the actual pump stroke of the pump piston is achieved in that the movable contact piece or its switching rod is coupled to the pump piston via a spring-loaded drag connection, so that the pump piston only begins its pump stroke when the pump is switched off. when the movable contact piece or its switching rod has covered a part of the switch-off stroke determined by the type of towing connection.
  • the time delay of the pump stroke is desirable because quenching gas under pressure to blow the resulting switching arc is not necessary at the beginning of the switch-off stroke, so that the power to be carried out by the switch drive to carry out the pump stroke is initially fully to accelerate the moving parts of the switch from the switch-on position out is available.
  • the pump piston is therefore limitedly movable with respect to the movable contact piece or its switching rod and, moreover, the drive at the beginning of the switch-off stroke still has to overcome the force of the spring provided in the towing connection.
  • the mobility of the pump piston with respect to the movable contact piece is no longer fully guaranteed. is accomplished, i.e. If the towing connection no longer functions or only functions slowly, then the pump stroke begins at the known switch at the beginning of the switch-off stroke, that is, too early, for which the performance of the switch drive may not be sufficient.
  • the pressure gas switch 10 shown has a housing 11 made of an insulating material, which is filled with an extinguishing gas, for example SFg, and is sealed off from the outside, the interior of which is divided by a partition wall 12 into a switching chamber 13 and into an expansion space 14.
  • a fixed contact 15 is arranged in the switching chamber 13, which is led out through the upper end wall 16 of the housing and is anchored in this end wall.
  • the stationary contact 15 has a ring of resilient contact fingers 17, which - held by a conductive sleeve 18 surrounding the ring - has an erosion ring 19 upstream.
  • a movable, pin-shaped contact piece 20 extends - in the pulled-out switch-on position - through a hub-like passage formed in the partition wall 12 and acting as a blowing nozzle 21 and engages with its free end 22 in the ring of contact fingers 17.
  • the movable contact piece 20 extends coaxially through the expansion space 14 and is coupled at its lower end via an isolating switch rod 23 to a drive 24, only shown schematically, with which the movable contact piece 20 is axially displaceable.
  • the movable contact piece 20 is guided through a set of sliding contacts 25, which in turn are fastened to a ring 26 which forms the inner end of a connecting conductor 27. This is fastened tightly at 28 in the housing 11 and led out laterally from this.
  • a pump cylinder 30 is arranged in the expansion space 17, for example by means of radial struts 29 with respect to the housing 11.
  • a suction valve 32 which is only shown schematically, and a spring-loaded pressure valve 33 which opens outwards.
  • a through bore 34 provided with seals is provided in the bottom 31 for the movable contact piece 20. From the part of the side wall of the pump cylinder adjoining the base 31 30 goes out a pressure line 35, which leads through the partition 12 into the switching chamber 13, and which is provided at its end with a check valve 36 opening towards the switching chamber 13.
  • a pump piston 37 is firmly anchored to the movable contact piece 20 and is in the switched-on position outside the pump cylinder 30 provided with a countersink 38. Only when the momentary system of the movable contact piece 20 is dotted (corresponds approximately to the minimum extinguishing distance) does the pump piston 37 move into the pump cylinder 30 and then displace the extinguishing gas there until the switch position indicated by the dashed line is reached.
  • the stationary contact piece 15 and the blowing nozzle 21 are surrounded by a hollow cylinder 39. Its annular end walls 40, 41, which are set back somewhat from its base lines, are fastened to the outside of the sleeve 18 or the blowing nozzle 21.
  • This hollow cylinder 39 thus divides the switching chamber 13 with its end walls 40, 41 into an actual arc space 42 which directly contains the switching path and into a pressure storage space 43 with a larger volume.
  • Spring-loaded pressure relief valves 44 are installed in the end wall 40, which open towards the pressure accumulator space 43, while non-return valves 45 opening towards the arc chamber 42 are installed in the end wall 41.
  • the pressure increase in the arc space 42 is greater, so that a part of this higher compressed quenching gas escapes from the arc space 42 through the pressure relief valves 44 upwards into the pressure storage space 42.
  • the entire pressure storage space also experiences an increase in pressure, but there is still fresh, uncontaminated extinguishing gas in its lower region.
  • the pressure from the arc chamber 42 is immediately discharged through the blowing nozzle 21, and the check valves 45 open simultaneously, so to speak, so that practically fresh extinguishing gas flows in from the pressure storage chamber 43 and also blows the switching arc. Even before the extinguishing gas displaced from the pump cylinder 30 is added.
  • the switching arc is blown in a similar manner, the extinguishing gas displaced from the pump cylinder being used somewhat later, however, because the increased pressure in the pressure storage space 43 initially still keeps the check valve 36 closed.
  • the pressure relief valve 33 is provided, which opens as long as the pressure in the pressure storage space 43 is still higher than the pressure in the pump cylinder 30 (as a result the check valve 36 remains closed), which in turn is sufficiently high to overcome the spring force of the pressure relief valve 33.

Landscapes

  • Circuit Breakers (AREA)
  • Control Of Combustion (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Reciprocating Pumps (AREA)

Claims (9)

1. Disjoncteur à gaz comprimé comportant une pièce de contact fixe et une pièce de contact mobile (15 et 20), qui peuvent être appliquées l'une contre l'autre et écartées l'une de l'autre dans une chambre de commande (13), cette chambre de commande (13) étant reliée d'un côté, par l'intermédiaire d'une buse de soufflage (21) fermée dans la position d'enclenchement par la pièce de contact mobile (20), avec une chambre d'expansion (14), et de l'autre côté, par l'intermédiaire d'un clapet anti- retour (36) s'ouvrant vers la chambre de commande (13), au côté de refoulement d'un cylindre de pompage, (30) placé dans une position fixe dans la chambre d'expansion (14) et auquel est associé un piston de pompage mobile (37) qui, lors d'une course de coupure du cylindre de pompage (30), est soumis à une pression avec retardement, caractérisé en ce que le piston de pompage (37) est relié rigidement à la pièce de contact mobile (20) et en ce que la longueur du cylindre de pompage (30) est plus petite que la course de commande de la pièce de contact mobile de sorte que le piston de pompage (37) se trouve à l'extérieur du cylindre de pompage (30) dans la zone de la position d'enclenchement.
2. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce qu'il est prévu une soupape de sûreté (33) chargée par ressort, partant de la chambre de pression du cylindre de pompage (30) et s'ouvrant vers la chambre d'expansion (14).
3. Disjoncteur à gaz comprimé selon la revendication 2, caractérisé en ce que la soupape de sûreté (33) est montée sur le cylindre de pompage (30).
4. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que la longueur de la course à vide parcourue en retour par le piston de pompage (37) depuis la position d'enclenchement jusqu'à l'entrée dans le cylindre de pompage (30) au cours d'une course de coupure correspond à peu près à la distance minimale d'extinction.
5. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que la chambre de commande (13) est divisée au moyen d'une paroi (39, 40, 41) entourant la pièce de contact fixe (15) et la buse de soufflage (21), en une chambre à arc (42) et une chambre d'accumulation de pression (43), le côté de refoulement du cylindre de pompage (30) étant. relié à la chambre d'accumulation de pression (43) qui est elle-même reliée à la chambre à arc (42) par l'intermédiaire d'au moins une soupape de sûreté (44), chargée par ressort et s'ouvrant vers la chambre (43), et d'au moins un clapet anti-retour (45) chargé par ressort et s'ouvrant vers la chambre à arc (42).
6. Disjoncteur à gaz comprimé selon la revendication 5, caractérisé en ce que la sollicitation par ressort de la soupape de sûreté (44) s'ouvrant vers la chambre d'accumulation de pression (43) est différente de la sollicitation par ressort du clapet antiretour (45) s'ouvrant vers la chambre à arc.
7. Disjoncteur à gaz comprimé selon la revendication 6, caractérisé en ce que la solicitation par ressort du clapet anti-retour (45) s'ouvrant vers la chambre à arc est plus faible que la sollicitation par ressort de la soupape de sûreté (44) s'ouvrant vers la chambre d'accumulation de pression (43).
8. Disjoncteur à gaz comprimé selon la revendication 5, caractérisé en ce que le volume intérieur de la chambre à arc (42) est plus petit que celui de la chambre d'accumulation de pression (43).
9. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que l'espacement du cylindre de pompage (30) par rapport à la position de fermeture de la buse de soufflage (21) est plus petit que l'espacement du piston de pompage (37) par rapport à l'extrémité libre (22) de la pièce de contact mobile (20).
EP80101206A 1980-03-10 1980-03-10 Disjoncteur à gaz comprimé Expired EP0035581B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT80101206T ATE5358T1 (de) 1980-03-10 1980-03-10 Druckgasschalter.
DE8080101206T DE3065575D1 (en) 1980-03-10 1980-03-10 Gas-blast circuit breaker
EP80101206A EP0035581B1 (fr) 1980-03-10 1980-03-10 Disjoncteur à gaz comprimé
US06/183,428 US4368367A (en) 1980-03-10 1980-09-02 Gas-blast switch
CA000361795A CA1148594A (fr) 1980-03-10 1980-10-08 Interrupteur a gaz comprime

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80101206A EP0035581B1 (fr) 1980-03-10 1980-03-10 Disjoncteur à gaz comprimé

Publications (2)

Publication Number Publication Date
EP0035581A1 EP0035581A1 (fr) 1981-09-16
EP0035581B1 true EP0035581B1 (fr) 1983-11-16

Family

ID=8186624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101206A Expired EP0035581B1 (fr) 1980-03-10 1980-03-10 Disjoncteur à gaz comprimé

Country Status (5)

Country Link
US (1) US4368367A (fr)
EP (1) EP0035581B1 (fr)
AT (1) ATE5358T1 (fr)
CA (1) CA1148594A (fr)
DE (1) DE3065575D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405122A1 (de) * 1984-02-14 1985-09-05 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Last- oder leistungsschalter fuer mittelspannungsnetze

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519470A1 (fr) * 1982-01-05 1983-07-08 Alsthom Atlantique Disjoncteur a gaz comprime
FR2558299B1 (fr) * 1984-01-13 1987-03-20 Alsthom Atlantique Disjoncteur a haute tension a soufflage d'arc
DE3412824A1 (de) * 1984-04-05 1985-10-17 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Elektrischer lastschalter, insbesondere zur verwendung in mittelspannungsschaltgeraeten
DE3437707A1 (de) * 1984-09-20 1986-03-27 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Druckgasschalter
FR2750822A1 (fr) * 1996-07-03 1998-01-09 Philips Electronics Nv Procede pour afficher une image vga sur un televiseur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2055312A (en) * 1933-08-19 1936-09-22 Ruppel Sigwart Switch
GB516531A (en) * 1938-06-22 1940-01-04 Reyrolle A & Co Ltd Improvements in or relating to electric circuit-breakers of the air-blast or gas-blast type
US2459599A (en) * 1944-09-20 1949-01-18 Westinghouse Electric Corp Circuit interrupter
US2957063A (en) * 1958-03-07 1960-10-18 Westinghouse Electric Corp Pumped-gas circuit interrupter
DE2710051A1 (de) * 1976-06-24 1978-01-05 Sprecher & Schuh Ag Druckgasschalter
FR2373141A1 (fr) * 1976-12-06 1978-06-30 Cem Comp Electro Mec Appareil electrique de coupure a haute tension, notamment un disjoncteur a autosoufflage de l'arc de coupure par un gaz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405122A1 (de) * 1984-02-14 1985-09-05 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Last- oder leistungsschalter fuer mittelspannungsnetze

Also Published As

Publication number Publication date
DE3065575D1 (en) 1983-12-22
ATE5358T1 (de) 1983-12-15
US4368367A (en) 1983-01-11
CA1148594A (fr) 1983-06-21
EP0035581A1 (fr) 1981-09-16

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