EP0441292A1 - Mittelspannungsschalter mit Selbstbeblasung - Google Patents

Mittelspannungsschalter mit Selbstbeblasung Download PDF

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Publication number
EP0441292A1
EP0441292A1 EP91101455A EP91101455A EP0441292A1 EP 0441292 A1 EP0441292 A1 EP 0441292A1 EP 91101455 A EP91101455 A EP 91101455A EP 91101455 A EP91101455 A EP 91101455A EP 0441292 A1 EP0441292 A1 EP 0441292A1
Authority
EP
European Patent Office
Prior art keywords
volume
circuit breaker
cylinder
semi
piston
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
EP91101455A
Other languages
English (en)
French (fr)
Other versions
EP0441292B1 (de
Inventor
Edmond Thuries
Denis Dufournet
Michel Perret
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0441292A1 publication Critical patent/EP0441292A1/de
Application granted granted Critical
Publication of EP0441292B1 publication Critical patent/EP0441292B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/98—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
    • H01H33/88—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

Definitions

  • the present invention relates to a medium or high voltage circuit breaker in which the insulation is provided by a gas with good dielectric properties, such as sulfur hexafluoride (SF6), this same gas ensuring by self-blowing the extinction of the 'arc which forms at the separation of the arcing contacts of the circuit breaker.
  • a gas with good dielectric properties such as sulfur hexafluoride (SF6)
  • thermal volume or blowing volume which contains the arcing contacts and which, when the contacts are separated, is heated by the arcing and therefore undergoes a pressure increase. At the first zero crossing of the current, the gas expands and blows the arc.
  • the displacement of the piston is more or less important and correlatively, the blowing volume is more or less large.
  • Such a device has a drawback.
  • a first object of the invention is to cut the high currents by self-blowing with thermal expansion in a thermal expansion volume dimensioned for this purpose, and the cutting of low currents by self-pneumatic boost blowing with piston in a part only thermal expansion volume.
  • a second object of the invention is to provide an apparatus in which the speed and the ascent stroke of the semi-fixed assembly are progressively limited.
  • a third object of the invention is to provide an apparatus into which fresh gas is injected into the area of the arcing contacts during an engagement maneuver, which notably improves the operation of the apparatus during the cycles of operation of the aforementioned type.
  • circuit breaker of the invention which is a medium or high voltage circuit breaker with self-blowing arc comprising an envelope sealed filled with a dielectric gas inside which are placed a first contact, semi-fixed, electrically connected to a first socket-outlet and a second contact, mobile, electrically connected to a second socket-outlet and mechanically connected to an operating member, said semi-fixed contact being integral with a piston moving in a cylinder, said piston delimiting in said cylinder a first volume on the side of the arc zone and a second volume, said semi-fixed contact being subjected to the action of a spring tending to move the semi-fixed contact in the same direction as the movable contact during a tripping operation, characterized in that the circuit breaker comprises means for limiting, during a tripping operation, on short-circuit current, the speed and amplitude of the movement of the piston in the opposite direction to that of the rebound of the spring, the same means allowing an injection of gas not in. Eluted to the arcing
  • said means comprise members for closing, during a triggering operation, said second volume, the same members allowing gas to pass from said second volume to said first volume during a reset operation.
  • said members comprise on the one hand first holes passing through said piston and closable by first unidirectional valves closed when the pressure in said first volume is greater than the pressure in said second volume, and on the other hand second through holes the bottom of said cylinder and closable by second unidirectional valves closed when the pressure in said second volume is greater than the pressure prevailing in the envelope outside said cylinder.
  • said first valves are formed together by a first washer.
  • said second valves are formed together by a second washer.
  • FIG 1 there is a casing 1, of insulating material, inside which there is a gas with good dielectric properties such as sulfur hexafluoride SF6, under a pressure of one to a few bars.
  • a first socket 2 passing through the envelope in a sealed manner, is electrically connected by a braid 3, to a first contact 4 called semi-fixed for reasons explained below.
  • the contact 4, produced in tubular form, is terminated by a wearing part 4A made of a material resistant to the effects of the electric arc, for example an alloy based on tungsten.
  • Rod 7 has an end 7A of material resistant to the effects of the electric arc.
  • the semi-fixed contact 4 carries a piston 8 sliding in a fixed cylinder 9; the stroke of the piston 8 is limited by a lower shoulder 11 and an upper ring 12; the semi-fixed contact 4 is pushed by a spring 13 which is compressed when the circuit breaker is in the engaged position, as is the case in FIG. 1.
  • the cylinder 9 is fixed by a bottom 14 to a cylinder 15 of larger dimensions; the cylinder 15 is fixed to the casing 1; it carries, at one end, an insulating nozzle 16, through which the rod 7 slides.
  • the piston 8 separates the interior of the cylinder into two volumes, V1 at the bottom of the figure and V2 at the top.
  • the volumes V1 and V2 can communicate through orifices 18 made through the piston 8; these orifices can be closed simultaneously by a one-way valve consisting of a washer 19 retained by a shoulder 21 of the piston 8.
  • the volume V2 can communicate with the volume V3 outside the cylinder 9 through orifices 22 made in the bottom of this cylinder; these orifices can be closed simultaneously by a one-way valve constituted by a washer 23 retained by the crown 12.
  • Ports 24 made in the cylinder 15 facilitate the circulation of gas inside the casing 1.
  • V4 denotes the volume between the cylinders 15 and 9; this volume V4, in permanent communication with the volume V1 by a passage between the nozzle 16 and the end of the cylinder 9, constitutes, with the volume V1, a volume V1 + V4 of thermal expansion of the circuit breaker.
  • the rod 7 is pulled by the operating mechanism towards the bottom of the figure.
  • the semi-fixed contact 4, pushed by the spring 13, accompanies the rod in its movement, until it is stopped by the shoulder 11.
  • the rod continues its movement alone, thus causing the separation of the contacts.
  • An arc 50 erupts between the contacts ( Figure 2) and heats the surrounding gas.
  • the overpressure, generated by the displacement of the piston 8 and the heating of the gas in the volumes V1 and V4 causes a blowing of the arc, through the nozzle 16 and the contact 4A, and its extinction at a zero crossing of the current.
  • the tripping process is identical to that just described, until the contacts are separated.
  • the arc 51 (FIG. 3) is very large and produces a release of heat which leads to a very strong increase in the pressure in the volumes V1 and V4.
  • the contact 4 is pushed up towards the top of the figure, due to the very strong pressure which is exerted on the piston 8 and which produces a force greater than that of the spring 13.
  • the volume V1 is thus enlarged, so that the the pressure which reigns there, while being significant, nevertheless retains an acceptable value.
  • the overpressure in the volume V1 causes the closure of the valve 19 which isolates the volume V2.
  • the latter decreases due to the displacement of the piston 8; he this results in an increase in the pressure in the volume V2 which, on the one hand, closes the valve 23 and on the other hand, limits the speed and the stroke of the piston 8, the gas of the volume V2 acting as a damper.
  • the arc 51 does not stretch too much, which makes it possible to limit the heating and pollution of the surrounding gas by the decomposition products of SF6.
  • the overpressure generated essentially by thermal expansion in volumes V1 and V4 causes a blowing of the arc through the nozzle 16 and the contact 4A, and its extinction at a zero crossing of the current.
  • the invention is not limited to the embodiment which has just been described by way of example, but applies to any circuit breaker in which the means of the invention are replaced by means fulfilling the same function in view of the same result.
  • the invention applies to medium and high voltage circuit breakers.

Landscapes

  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP91101455A 1990-02-07 1991-02-04 Mittelspannungsschalter mit Selbstbeblasung Expired - Lifetime EP0441292B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001406A FR2657998B1 (fr) 1990-02-07 1990-02-07 Disjoncteur a moyenne ou haute tension a autosoufflage.
FR9001406 1990-02-07

Publications (2)

Publication Number Publication Date
EP0441292A1 true EP0441292A1 (de) 1991-08-14
EP0441292B1 EP0441292B1 (de) 1995-05-10

Family

ID=9393462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101455A Expired - Lifetime EP0441292B1 (de) 1990-02-07 1991-02-04 Mittelspannungsschalter mit Selbstbeblasung

Country Status (11)

Country Link
US (1) US5126516A (de)
EP (1) EP0441292B1 (de)
JP (1) JPH0828158B2 (de)
CN (1) CN1023735C (de)
AT (1) ATE122498T1 (de)
BR (1) BR9100493A (de)
CA (1) CA2035688C (de)
DE (1) DE69109508T2 (de)
DK (1) DK0441292T3 (de)
ES (1) ES2072460T3 (de)
FR (1) FR2657998B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683382A1 (fr) * 1991-10-31 1993-05-07 Alsthom Gec Disjoncteur a moyenne ou haute tension a contacts d'arc en bout.
FR2692716A1 (fr) * 1992-06-18 1993-12-24 Alsthom Gec Disjoncteur à haute ou moyenne tension à expansion thermique et soufflage d'appoint.
WO2011018426A1 (fr) 2009-08-14 2011-02-17 Areva T&D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre reduite
EP2402970A1 (de) 2010-07-01 2012-01-04 Alstom Grid SAS Unterbrechungskammer eines Schutzschalters für Hoch- und Mittelspannung mit reduzierter Bedienungsenergie und kleineren Abmessungen
FR2978597A1 (fr) * 2011-07-26 2013-02-01 Alstom Grid Sas Commande d'un interrupteur ou d'un disjoncteur

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683383B1 (fr) * 1991-11-04 1993-12-31 Gec Alsthom Sa Disjoncteur a haute ou moyenne tension a triple mouvement.
US20050045595A1 (en) * 2003-09-03 2005-03-03 Christian Daehler Pressure-limiting valve for a puffer interrupter assembly
PL2200062T3 (pl) * 2008-12-18 2012-06-29 Abb Technology Ag Zwiernik dla łączników średniego napięcia i łączników wysokonapięciowych
KR101309317B1 (ko) * 2009-09-10 2013-09-30 엘에스산전 주식회사 가스 차단기용 밸브 및 그를 이용한 가스 차단기
EP2387057B1 (de) * 2010-05-12 2012-05-23 ABB Technology AG Gasisolierter Hochspannungsschalter
JP2012094455A (ja) * 2010-10-28 2012-05-17 Toshiba Corp ガス遮断器
CN103280375B (zh) * 2013-05-24 2015-07-01 沈阳华德海泰电器有限公司 一种用于真空断路器操作机构的油缓冲器
DK3465717T3 (da) * 2016-06-03 2020-10-26 Abb Schweiz Ag Gasisoleret lav- eller mellemspændingsbelastningsafbryder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041081A1 (de) * 1980-06-02 1981-12-09 BBC Aktiengesellschaft Brown, Boveri & Cie. Elektrischer Selbstblasschalter
EP0175954A2 (de) * 1984-09-26 1986-04-02 BBC Brown Boveri AG Druckgasschalter
EP0315505A1 (de) * 1987-11-04 1989-05-10 Merlin Gerin Elektrischer selbstgeblasener Lastschalter mit veränderlichem Löschkammervolumen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535432A (en) * 1978-09-04 1980-03-12 Mitsubishi Electric Corp Switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041081A1 (de) * 1980-06-02 1981-12-09 BBC Aktiengesellschaft Brown, Boveri & Cie. Elektrischer Selbstblasschalter
EP0175954A2 (de) * 1984-09-26 1986-04-02 BBC Brown Boveri AG Druckgasschalter
EP0315505A1 (de) * 1987-11-04 1989-05-10 Merlin Gerin Elektrischer selbstgeblasener Lastschalter mit veränderlichem Löschkammervolumen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683382A1 (fr) * 1991-10-31 1993-05-07 Alsthom Gec Disjoncteur a moyenne ou haute tension a contacts d'arc en bout.
FR2692716A1 (fr) * 1992-06-18 1993-12-24 Alsthom Gec Disjoncteur à haute ou moyenne tension à expansion thermique et soufflage d'appoint.
WO2011018426A1 (fr) 2009-08-14 2011-02-17 Areva T&D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre reduite
EP2402970A1 (de) 2010-07-01 2012-01-04 Alstom Grid SAS Unterbrechungskammer eines Schutzschalters für Hoch- und Mittelspannung mit reduzierter Bedienungsenergie und kleineren Abmessungen
FR2962253A1 (fr) * 2010-07-01 2012-01-06 Areva T & D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manœuvre et dimensions reduites
FR2978597A1 (fr) * 2011-07-26 2013-02-01 Alstom Grid Sas Commande d'un interrupteur ou d'un disjoncteur

Also Published As

Publication number Publication date
CN1023735C (zh) 1994-02-09
BR9100493A (pt) 1991-10-29
JPH0828158B2 (ja) 1996-03-21
CA2035688C (fr) 1994-07-26
JPH065167A (ja) 1994-01-14
CA2035688A1 (fr) 1991-08-08
CN1063966A (zh) 1992-08-26
ES2072460T3 (es) 1995-07-16
FR2657998B1 (fr) 1992-04-10
DK0441292T3 (da) 1995-08-14
FR2657998A1 (fr) 1991-08-09
DE69109508T2 (de) 1995-09-14
US5126516A (en) 1992-06-30
EP0441292B1 (de) 1995-05-10
ATE122498T1 (de) 1995-05-15
DE69109508D1 (de) 1995-06-14

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