EP0270895A1 - Interrupteur à gaz comprimé - Google Patents

Interrupteur à gaz comprimé Download PDF

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Publication number
EP0270895A1
EP0270895A1 EP87117221A EP87117221A EP0270895A1 EP 0270895 A1 EP0270895 A1 EP 0270895A1 EP 87117221 A EP87117221 A EP 87117221A EP 87117221 A EP87117221 A EP 87117221A EP 0270895 A1 EP0270895 A1 EP 0270895A1
Authority
EP
European Patent Office
Prior art keywords
switching
contact
gas
extinguishing
arc
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.)
Withdrawn
Application number
EP87117221A
Other languages
German (de)
English (en)
Inventor
Lutz Dr. Niemeyer
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0270895A1 publication Critical patent/EP0270895A1/fr
Withdrawn legal-status Critical Current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
    • H01H33/7015—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
    • 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
    • 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
    • H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted
    • 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
    • H01H33/7076—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by the use of special materials

Definitions

  • the invention is based on a gas pressure switch with a housing containing extinguishing gas, two cylindrical switching elements which can be brought into or out of engagement with one another along an axis in the housing and each have a burnout contact, of which a first is fastened to the housing and a second is designed as an extinguishing nozzle and when switched off can be guided by a heating volume enclosed by the housing for storing compressed gas, which is formed by heating extinguishing gas by means of a switching arc drawn after the burnup contacts have been separated.
  • a switch of the aforementioned type is known from EP-A1-0 195 904.
  • the known switch has a heating volume which receives the switching arc and which can be connected to an expansion space via a movable switching piece designed as an extinguishing nozzle and a suitably dimensioned exhaust pipe.
  • this switch can be smaller when switching Currents the formation of heat-sensitive arc instabilities.
  • the extinguishing pressure build-up is created by constriction of the arc in the extinguishing nozzle and therefore increases quadratically with the current. Therefore, with this switch, the pressure built up when switching small currents through the arc in the heating volume may be too low and the pressure built up when switching large currents through the arc in the heating volume may be too high.
  • the invention is based on the object of specifying a switch of the type mentioned, in which a comparatively high pressure is built up in the heating volume when switching small currents by the switching arc, but a comparatively low one when switching large currents Print.
  • the pressure gas switch according to the invention is characterized in that the pressure of the extinguishing gas in the heating volume is raised compared to the pressure in comparable switches in the case of small currents and is lowered in the case of high currents. Therefore unnecessarily high pressure build-up in the heating volume and undesired nozzle burnout are avoided and both small and large flows can be switched safely.
  • the single figure shows a plan view of a section through a pressure gas switch designed according to the invention, in which the pressure gas switch is shown in the left part of the figure during switching off and in the right part in the switched-on state.
  • the pressure gas switch shown in the figure has a housing made of insulating material filled with an extinguishing gas, such as sulfur hexafluoride, in which two cylindrical switching elements 2 and 3 are arranged coaxially to one another. Both contact pieces 2 and 3 can be brought into or out of engagement with one another along their common axis.
  • an extinguishing gas such as sulfur hexafluoride
  • a first 2 of these two contact pieces is connected in an electrically conductive manner rigidly to a power connection 4 fastened to the housing 1 and is formed by a hollow cylindrical contact piece 5 and a pin contact 6 arranged coaxially thereto.
  • the contact piece 5 is divided by helically guided slots 7. It carries an annular nominal current contact 8 on its inner surface and an annular erosion contact 9 at its free end.
  • the pin contact 6 carries a cap 10 made of erosion-resistant material, such as graphite, at its free end.
  • a second 3 of the two contact pieces 2 and 3 can be moved up or down in the direction of the contact piece axis by a drive (not shown) and is in electrical contact with a fixedly arranged power connection (not shown) via a sliding contact (also not shown).
  • the contact piece 3 is formed at its free end as an extinguishing nozzle 11 and has an annular erosion contact 12 on its cylindrical outer surface and an insulating material cover 13, preferably made of polytetrafluoroethylene (PTFE), which extends over the outer surface of the contact piece 3 and on its end face Burn-off contact 12 separates from an extinguishing contact 14 forming the constriction of the extinguishing nozzle 11.
  • the cylindrical outer surface of the contact piece 3 is formed below the erosion contact 12 as an annular nominal current contact 15.
  • a heating volume 16 which is arranged coaxially with the switching elements 2 and 3 and is closed in the switch-on position of the compressed gas switch, and an expansion space 17 connected to the interior of the switching element 3 and the extinguishing nozzle 11.
  • the heating volume 16 has two insulating rings 18 and 19, which are arranged coaxially to the switching pieces 2 and 3 and are made of a material that strongly evaporates under the influence of an arc, such as PTFE with an addition of, for example, 7% of molybdenum sulfide.
  • a first 18 of these two insulating material rings is arranged at the free end of the switching element 2 such that, in the course of the switching-off movement of the second switching element 3, together with its insulating material cover 13, it forms an outflow channel 20 connecting the heating volume 16 with the interior of the extinguishing nozzle 11 (left part of the figure ).
  • a second 19 of these two insulating rings is arranged in the interior of the heating volume 16 on its wall facing away from the outflow channel 20.
  • the contact piece 5 of the switching piece 2 comprises the switching piece 3 in a frictional manner.
  • the current flows from the current connection 4 via the contact piece 5, the nominal current contacts 8 and 15 to the switching piece 3 and from there via the sliding contact, not shown, to the power connection, not shown.
  • the opening of the extinguishing nozzle 11 encloses the pin contact 6.
  • the heating volume 16 filled with extinguishing gas is closed and has no connection with the interior of the extinguishing nozzle 11 or the switching piece 3 and the expansion space 17.
  • the contact piece 3 When switching off, the contact piece 3 is moved downward and the two nominal current contacts 8 and 15 are first opened.
  • the current to be switched off now flows via the erosion contacts 9 and 12.
  • an arc burning between these contacts is drawn, which in the course of the further disconnection movement into the Heating volume 16 is guided (left part of the figure).
  • This arc can develop freely in the heating volume 16.
  • the base point of this arc on the contact piece 5 is under the action of a magnetic field because of the helical slots 7 and therefore rotates on the erosion contact 9 about the contact piece axis.
  • the erosion of the erosion contact 9 and the insulating cover 13 is reduced.
  • the arc denoted by the reference symbol 21 can develop instabilities and be greatly extended.
  • the arc provided with the reference symbol 22 has a comparatively stable shape and is therefore shortened. It then produces a comparatively low heating output.
  • the pressure of the extinguishing gas stored by the heating volume 16 is therefore raised in the case of small currents and reduced in the case of large currents.
  • the outflow channel 20 and thus also the gas passage through the extinguishing nozzle 11 into the expansion space 17 is released.
  • the quenching nozzle 11 is therefore not involved in the build-up of pressure and, moreover, does not have to conduct the arc during the entire short-circuit current duration. Only shortly before zero current does the extinguishing contact 14 forming the constriction of the extinguishing nozzle 11 take over the arc now provided with the reference number 23 in order to extinguish it.
  • the commutation of the arc 21 or 22 on the quenching contact 14 is here effected by the radial gas flow from the heating volume 16 to the expansion space 17 which begins after the discharge channel 20 is released.
  • the insulating ring 18 supports the arc commutation by releasing insulating steam. Due to the commutation of the arc foot point from the erosion contact 9 to the pin contact 6, the centering of the arc, now designated with 24, on the axis of the extinguishing zone is additionally facilitated.

Landscapes

  • Circuit Breakers (AREA)
EP87117221A 1986-12-08 1987-11-23 Interrupteur à gaz comprimé Withdrawn EP0270895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH488386 1986-12-08
CH4883/86 1986-12-08

Publications (1)

Publication Number Publication Date
EP0270895A1 true EP0270895A1 (fr) 1988-06-15

Family

ID=4284202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117221A Withdrawn EP0270895A1 (fr) 1986-12-08 1987-11-23 Interrupteur à gaz comprimé

Country Status (3)

Country Link
US (1) US4843199A (fr)
EP (1) EP0270895A1 (fr)
JP (1) JPS63152828A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524088A1 (fr) * 1991-07-19 1993-01-20 Gec Alsthom Sa Contact pour disjoncteur
DE19524217A1 (de) * 1995-07-03 1997-01-09 Abb Research Ltd Leistungsschalter

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19517615A1 (de) * 1995-05-13 1996-11-14 Abb Research Ltd Leistungsschalter
EP1207544B1 (fr) * 2000-11-17 2006-06-14 ABB Schweiz AG Régions de contact pour disjoncteur
US6926547B2 (en) * 2001-07-06 2005-08-09 Delphi Technologies, Inc. Electrical connector
EP1913621A1 (fr) * 2005-08-10 2008-04-23 ABB Research Ltd Disjoncteur a autosoufflage pourvu d'un corps de commande
JP5242461B2 (ja) * 2009-03-06 2013-07-24 株式会社東芝 ガス遮断器
FR3011976B1 (fr) * 2013-10-10 2015-12-18 Alstom Technology Ltd Sectionneur a pouvoir d'etablissement et de coupure ameliores
US11380501B2 (en) * 2019-12-31 2022-07-05 Southern States Llc High voltage electric power switch with carbon arcing electrodes and carbon dioxide dielectric gas

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1004807A (fr) * 1947-05-16 1952-04-03 Interrupteur à soufflage d'arc
FR2033063A5 (fr) * 1969-02-26 1970-11-27 English Electric Co Ltd
GB1321812A (en) * 1969-04-22 1973-07-04 Reyrolle Co Ltd A High-voltage gas circuit-breakers
DE2633093A1 (de) * 1976-07-20 1978-01-26 Siemens Ag Elektrischer schalter mit geschlossenem gasraum
FR2447091A1 (fr) * 1979-01-18 1980-08-14 Sprecher & Schuh Ag Disjoncteur a gaz comprime
DE3323865A1 (de) * 1983-06-29 1983-11-17 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Hochspannungsschaltkammer
DE3424966A1 (de) * 1984-07-06 1986-01-16 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer gasstroemungsschalter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO855379L (no) * 1985-02-27 1986-08-28 Bbc Brown Boveri & Cie Trykkgassbryter.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1004807A (fr) * 1947-05-16 1952-04-03 Interrupteur à soufflage d'arc
FR2033063A5 (fr) * 1969-02-26 1970-11-27 English Electric Co Ltd
GB1321812A (en) * 1969-04-22 1973-07-04 Reyrolle Co Ltd A High-voltage gas circuit-breakers
DE2633093A1 (de) * 1976-07-20 1978-01-26 Siemens Ag Elektrischer schalter mit geschlossenem gasraum
FR2447091A1 (fr) * 1979-01-18 1980-08-14 Sprecher & Schuh Ag Disjoncteur a gaz comprime
DE3323865A1 (de) * 1983-06-29 1983-11-17 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Hochspannungsschaltkammer
DE3424966A1 (de) * 1984-07-06 1986-01-16 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung fuer gasstroemungsschalter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524088A1 (fr) * 1991-07-19 1993-01-20 Gec Alsthom Sa Contact pour disjoncteur
FR2679375A1 (fr) * 1991-07-19 1993-01-22 Alsthom Gec Contact pour disjoncteur.
DE19524217A1 (de) * 1995-07-03 1997-01-09 Abb Research Ltd Leistungsschalter

Also Published As

Publication number Publication date
JPS63152828A (ja) 1988-06-25
US4843199A (en) 1989-06-27

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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18D Application deemed to be withdrawn

Effective date: 19911022

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Inventor name: NIEMEYER, LUTZ, DR.