EP0002684B1 - Druckgasschalter - Google Patents

Druckgasschalter Download PDF

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Publication number
EP0002684B1
EP0002684B1 EP78101558A EP78101558A EP0002684B1 EP 0002684 B1 EP0002684 B1 EP 0002684B1 EP 78101558 A EP78101558 A EP 78101558A EP 78101558 A EP78101558 A EP 78101558A EP 0002684 B1 EP0002684 B1 EP 0002684B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
gas
insulating material
circuit breaker
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
Application number
EP78101558A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0002684A1 (de
Inventor
Karl Zückler
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0002684A1 publication Critical patent/EP0002684A1/de
Application granted granted Critical
Publication of EP0002684B1 publication Critical patent/EP0002684B1/de
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
    • H01H33/91—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 the arc-extinguishing fluid being air or gas
    • 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 a gas pressure switch with two fixed nozzle-shaped contact pieces which are bridged in the switched-on position by a hollow cylindrical movable contact piece, and with a blowing device consisting of a piston and a movable cylinder, the cylinder being coupled to the movable contact piece and in the course of the switch-off process runs from one of the fixed switching elements and is provided with an annular insulating body which reduces the flow cross-section between the fixed switching elements in the course of the switching-off process.
  • Such a pressure gas switch is known from DE-AS 2438017, in which the annular insulating body is designed as an insulating tube perforated on the casing side, which directly surrounds the arc combustion chamber during the extinguishing phase and is coupled to the moving part of the blowing device, the blowing cylinder.
  • the tube is connected on the one hand to the blow cylinder base enclosing a fixed contact and on the other hand to the free end of the bridging contact.
  • an arc column is formed between the arc electrodes, which has a thickness that is current-proportional in a first approximation.
  • the hollow nozzle-shaped contact pieces intended for the entry of the arc must be dimensioned in their inner diameter. The diameter of the nozzle-shaped contact pieces is thus largely defined for reliable arc quenching.
  • the isolating gap between the open contact pieces after the arc quenching must also have such a high dielectric strength that re-ignition of the arc is impossible.
  • This requires such a large distance between the fixed nozzle-shaped switching elements or such a large length of the separating section that, at higher voltages, the radial gas flow speed in the separating section becomes significantly lower than in the nozzles of the fixed switching elements. This can lead to an undesired radially outward migration of the arc.
  • an insulating material body which reduces the flow cross-section between the fixed contact pieces is advantageous in the case of blown piston switches for higher voltages and high currents.
  • the invention has for its object to provide a gas pressure switch of the type mentioned, in which the ring-shaped insulating body does not impair the dielectric strength of the isolating section and contributes to an improvement in the switching behavior with capacitive currents.
  • the insulating material body has an axial extent which is less than the length of the separation distance between the fixed contact pieces and is arranged approximately in the middle between the cylinder bottom and the free end of the movable contact piece.
  • From DE-A-23 26 650 is a gas pressure switch with two axially movable against each other Lichen cylindrical, arranged on a common axis at a distance from each other and on the facing end faces nozzle-shaped switching pieces an insulating body, the axial extent is less than the length of the Separation distance between the two contacts, but the insulating body is not in the middle between the cylinder bottom and the free end of the movable contact.
  • the effects of the known insulating body are also different.
  • the gas throughput in the inflow region of the separating section is controlled such that the radial flow rate of the extinguishing gas in the separating section and the axial flow rate in the nozzle-shaped switching elements are approximately the same, taking into account the change in density.
  • the gas throughput is thus optimized in an advantageous manner.
  • the ring-shaped body can at least partially consist of a material which emits additional quenching gas under an arc load.
  • the axial extent of the annular body can be about half the separation distance.
  • the ring-shaped body is carried by a screen-like wall which is designed as an intermediate floor and extends transversely to the axis of the cylinder. The through openings of the screen-like wall must be at least as large as the cross-section of the outflow through the nozzles.
  • the pressure gas switch shown schematically in FIG. 1 contains only the parts necessary for understanding the invention, e.g. B. without the drive and the supporting insulators supporting the switching chamber.
  • a switching chamber 1 which consists of insulating material, there is sulfur hexafluoride as a gaseous extinguishing and insulating agent under a pressure of, for example, 6 bar.
  • the switching chamber 1 encloses two fixed nozzle-shaped switching pieces 2, 3, which are bridged by a hollow cylindrical moving switching piece 5 in the switch-on position shown to the right of the center line 4. In the switch-off position shown to the left of the center line 4, the separating distance a between the switching pieces 2 and 3 is free.
  • the gas pressure switch has a blowing device consisting of a fixed piston 6 and a movable cylinder 7, which compresses extinguishing gas in the course of the switching-off movement and discharges it into the interior of the switching elements 2, 3 through the annular gap formed by the switching elements 2 and 3 in the region of the separating distance. From the moment the movable contact piece 5 is separated from the fixed contact piece 2, the separation distance and thus the cross section effective for the gas throughput is increased until an annular body 8 reduces the flow cross section between the fixed contact pieces 2 and 3.
  • the annular body 8 has an axial extent that is less than the length a of the separation distance between the switching pieces 2 and 3.
  • the annular body preferably has an axial extent which is approximately half of the separation distance a. It is supported by a wall 11 designed as an intermediate floor, which extends transversely to the axis 4 of the cylinder 7.
  • the wall 11 is sieve-shaped and is suitable for the passage of piston parts 12 in order to limit an increase in the space which is harmful to the compression.
  • the curve shown in FIG. 2 results for the effective free gap width in the region of the separating distance.

Landscapes

  • Circuit Breakers (AREA)
EP78101558A 1977-12-30 1978-12-04 Druckgasschalter Expired EP0002684B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2759268 1977-12-30
DE2759268A DE2759268C3 (de) 1977-12-30 1977-12-30 Druckgasschalter

Publications (2)

Publication Number Publication Date
EP0002684A1 EP0002684A1 (de) 1979-07-11
EP0002684B1 true EP0002684B1 (de) 1982-04-28

Family

ID=6027944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101558A Expired EP0002684B1 (de) 1977-12-30 1978-12-04 Druckgasschalter

Country Status (4)

Country Link
US (1) US4223192A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0002684B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5494673A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2759268C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3070004D1 (en) * 1980-06-23 1985-03-07 Bbc Brown Boveri & Cie High voltage power circuit breaker
DE8119801U1 (de) * 1981-07-02 1984-11-29 Siemens AG, 1000 Berlin und 8000 München Kontaktsystem für Druckgas-Leistungsschalter
DE3134644A1 (de) * 1981-08-28 1983-03-17 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
DE3145391C2 (de) * 1981-11-12 1984-10-11 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
DE3323865C2 (de) * 1983-06-29 1991-01-03 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Hochspannungsschaltkammer
DE3915700C3 (de) * 1989-05-13 1997-06-19 Aeg Energietechnik Gmbh Druckgasschalter mit Verdampfungskühlung
WO2016146474A1 (de) 2015-03-17 2016-09-22 Covestro Deutschland Ag Silangruppen enthaltende polyisocyanate auf basis von 1,5-diisocyanatopentan

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE607466C (de) * 1929-08-13 1935-01-03 Calor Elek Zitaets Akt Ges Schalter mit Lichtbogenloeschung durch Pressluft
CH413960A (de) * 1964-12-23 1966-05-31 Bbc Brown Boveri & Cie Kontaktanordnung für Druckgasschalter
DE2209287C3 (de) * 1972-02-22 1974-12-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektrischer Druckgasschalter
CH556602A (de) * 1973-01-12 1974-11-29 Sprecher & Schuh Ag Druckgasschalter.
CH558079A (de) * 1973-05-10 1975-01-15 Bbc Brown Boveri & Cie Druckgasschalter.
DE2336684A1 (de) * 1973-07-19 1975-01-30 Bbc Brown Boveri & Cie Druckgasschalter
DE2438017C3 (de) * 1974-08-05 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
DE2531568C2 (de) * 1975-07-11 1982-05-06 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter

Also Published As

Publication number Publication date
JPS6352729B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-10-20
DE2759268A1 (de) 1979-07-05
US4223192A (en) 1980-09-16
JPS5494673A (en) 1979-07-26
EP0002684A1 (de) 1979-07-11
DE2759268C3 (de) 1984-08-02
DE2759268B2 (de) 1979-10-31

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