EP1040496A1 - Elektrischer schalter - Google Patents

Elektrischer schalter

Info

Publication number
EP1040496A1
EP1040496A1 EP98962578A EP98962578A EP1040496A1 EP 1040496 A1 EP1040496 A1 EP 1040496A1 EP 98962578 A EP98962578 A EP 98962578A EP 98962578 A EP98962578 A EP 98962578A EP 1040496 A1 EP1040496 A1 EP 1040496A1
Authority
EP
European Patent Office
Prior art keywords
arc
circuit breaker
electrical circuit
contacts
gas
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.)
Granted
Application number
EP98962578A
Other languages
English (en)
French (fr)
Other versions
EP1040496B1 (de
Inventor
William Bewick Hall
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.)
VA Tech Elin Service BV
Original Assignee
VA Tech Elin Service BV
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 VA Tech Elin Service BV filed Critical VA Tech Elin Service BV
Publication of EP1040496A1 publication Critical patent/EP1040496A1/de
Application granted granted Critical
Publication of EP1040496B1 publication Critical patent/EP1040496B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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

Definitions

  • the present invention relates to an electrical circuit breaker and in particular to one in which an arc is rotated to assist in extinguishing the arc.
  • Electrical circuit breakers which have a pair of opposing contacts located in an enclosure filled with an insulating fluid, for example sulphur hexafloride (SFg) gas.
  • the contacts are capable of relative movement between a closed circuit position in which they engage with one another to pass a current therebetween and an open circuit position in which the contacts are separated.
  • SFg sulphur hexafloride
  • the arc is rotated.
  • the arc is rotated by a Lorentz force produced when the current flowing through the arc cuts a magnetic field generated by a coil adjacent the contacts.
  • the arc is rotated to remove it from areas were the gas has been ionised. If the arc is rotated faster than the gas can be ionised the arc will be extinguished.
  • a problem with electrical circuit breakers in which the arc is rotated is that degradation of the gas in the region between the contacts where the arc is generated occurs and the arc may also short circuit the coil.
  • the present invention seeks to provide an improved electrical circuit breaker in which the aforementioned problems are eliminated.
  • an electrical circuit breaker comprises an enclosure filled with an insulating fluid, at least one pair of opposing contacts housed m the enclosure which are capable of being separated to draw an arc, the insulating fluid being purged from the area where the arc is drawn to assist in the extinguishment of the arc.
  • a coil is located adjacent the contacts which generates a magnetic field to rotate the arc drawn between the contacts.
  • the contacts are separated by relative axial movement.
  • Relative axial movement between the contacts may be provided by at least one actuator.
  • the actuator may have a piston mounted thereon which acts to compress a purging fluid, means being provided to direct the compressed purging fluid to the region where the arc is drawn.
  • the purging fluid may be directed to the region where the arc is drawn via a passageway through at least one of the contacts or via at least one conduit.
  • the purging fluid is sulphur hexafloride.
  • a shield may be provided adjacent the coil which prevents the arc short circuiting the coil.
  • Figure 1 is a cross-sectional view of an electrical circuit breaker m accordance with the present invention in an open circuit position.
  • an electrical circuit breaker generally indicated at 10, comprises an enclosure 12 filled with an insulating fluid.
  • the insulating fluid is sulphur hexafloride, SFg gas, under pressure.
  • the contacts 14 & 16 extend through the enclosure 12 and are capable of relative movement between a closed circuit position and an open circuit position.
  • the contact 14 is fixed and the contact 16 moves axially relative thereto.
  • the tip of contact 16 is inside the fixed contact 14 to pass a current therebetween.
  • the contact 16 is withdrawn from the contact 14 by an actuator 22.
  • the actuator 22 has a piston 24 mounted thereon and extends through a compression cylinder 25.
  • a coil 18 is provided adjacent the fixed contact 14 and a shield 20 is fitted adjacent the coil 18.
  • the actuator 22 moves the contact 16 axially relative to the fixed contact 14.
  • the contacts 14 and 16 are separated and an arc is drawn between them.
  • the tip of the contact 16 passes through electrode 17 the arc transfers to between the contact 16 and the electrode 17.
  • the electrical current path is then through the electrode 17 into the coil 18 and to the connection point 19.
  • a magnetic field is generated.
  • the magnetic field is cut by the current flowing through the arc and a Lorentz force is produced which rotates the arc.
  • the arc is rotated to remove it from areas where the insulating gas, SFg, has been ionised. If the arc is rotated faster than the gas can be ionised the arc will extinguish.
  • the shield 20 provides an enclosure for the arc such that the arc is trapped and cannot short circuit the coil 18.
  • the shield 20 also traps iomsed gas and metal vapours in region A.
  • the purging flow of SFg gas is compressed in the cylinder 25 by the piston 24 mounted on the actuator 22 of the contact 16. As the contact 16 moves axially the piston 24 compresses the SFg gas. The pressure is relieved as the gas passes through a passageway 26 in the moving contact 16 and conduits 28 to region A.
  • the purging flow of gas flushes out region A effectively dissipating the iomsed gases and metallic vapours which cause electrical breakdown.
  • the purging flow of gas therefore assists in extinguishing the arc.
  • the arc is extinguished by the combination of being rotated by the Lorentz force and the removal of heat, metallic vapours and ionised gas from region A.
  • An electrical circuit breaker in accordance with the present invention has particular efficacy at high voltages in the region above 72KV.
  • a purging flow of fluid can be used in any electrical circuit breaker where removal of iomsed gas or contaminants is required from the region where an arc is drawn.
  • the purging flow of fluid may be any insulating medium and may be provided- from a separate supply controlled independently from the movement of the contacts.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Saccharide Compounds (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Glass Compositions (AREA)
  • Relay Circuits (AREA)
  • Electronic Switches (AREA)
EP98962578A 1997-12-19 1998-12-21 Elektrischer schalter Expired - Lifetime EP1040496B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9726707 1997-12-19
GB9726707A GB2332566B (en) 1997-12-19 1997-12-19 Electrical circuit breaker
PCT/GB1998/003851 WO1999033081A1 (en) 1997-12-19 1998-12-21 Electrical circuit breaker

Publications (2)

Publication Number Publication Date
EP1040496A1 true EP1040496A1 (de) 2000-10-04
EP1040496B1 EP1040496B1 (de) 2002-05-22

Family

ID=10823790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98962578A Expired - Lifetime EP1040496B1 (de) 1997-12-19 1998-12-21 Elektrischer schalter

Country Status (11)

Country Link
EP (1) EP1040496B1 (de)
JP (1) JP2001527270A (de)
CN (1) CN1149600C (de)
AT (1) ATE218008T1 (de)
AU (1) AU1771299A (de)
DE (1) DE69805547T2 (de)
ES (1) ES2177118T3 (de)
GB (1) GB2332566B (de)
HK (1) HK1034801A1 (de)
MY (1) MY129528A (de)
WO (1) WO1999033081A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1406873B1 (de) 2001-06-27 2007-09-26 Smithkline Beecham Corporation Fluorpyrrolidine als dipeptidylpeptidaseinhibitoren
FR2905515B1 (fr) * 2006-08-30 2008-12-05 Areva T & D Sa Appareillage electrique sous enveloppe metallique comportant un piege a particules.
US8878092B2 (en) 2009-06-25 2014-11-04 Mitsubishi Electric Corporation Gas-insulated switchgear
DE102012202408A1 (de) * 2012-02-16 2013-08-22 Siemens Aktiengesellschaft Schaltgeräteanordnung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB516532A (en) * 1938-06-22 1940-01-04 Reyrolle A & Co Ltd Improvements in or relating to electric circuit-breaking devices of the gas-blast type
GB1346984A (en) * 1969-12-30 1974-02-13 Reyrolle Parsons Ltd Gas circuit-breakers
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
DE2809509A1 (de) * 1978-03-06 1979-09-13 Licentia Gmbh Druckgas-leistungsschalter
FR2422246A1 (fr) * 1978-04-07 1979-11-02 Merlin Gerin Dispositif de coupure pour interrupteur a autosoufflage magnetique et pneumatique de l'arc electrique
DE2815519A1 (de) * 1978-04-11 1979-10-25 Licentia Gmbh Druckgas-leistungsschalter
DE2820021A1 (de) * 1978-05-08 1979-11-15 Licentia Gmbh Hochspannungs-leistungsschalter mit rotierendem lichtbogen
US4291208A (en) * 1978-11-24 1981-09-22 Westinghouse Electric Corp. Gas-insulated circuit-interrupter having improved insulating nozzle
DE2904109A1 (de) * 1979-02-03 1980-08-07 Licentia Gmbh Druckgas-hochspannungsleistungsschalter
EP0067460B2 (de) * 1981-06-12 1990-03-21 BBC Brown Boveri AG Hochspannungsleistungsschalter
FR2596574B1 (fr) * 1986-04-01 1988-05-20 Alsthom Disjoncteur a haute tension a gaz dielectrique sous pression

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9933081A1 *

Also Published As

Publication number Publication date
CN1284202A (zh) 2001-02-14
ATE218008T1 (de) 2002-06-15
HK1034801A1 (en) 2001-11-02
MY129528A (en) 2007-04-30
ES2177118T3 (es) 2002-12-01
GB2332566B (en) 2001-09-19
DE69805547D1 (de) 2002-06-27
GB9726707D0 (en) 1998-02-18
WO1999033081A8 (en) 2000-08-31
JP2001527270A (ja) 2001-12-25
WO1999033081A1 (en) 1999-07-01
EP1040496B1 (de) 2002-05-22
AU1771299A (en) 1999-07-12
DE69805547T2 (de) 2003-01-09
CN1149600C (zh) 2004-05-12
GB2332566A (en) 1999-06-23

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