EP1806760A1 - Gasaustritt für Schalter - Google Patents

Gasaustritt für Schalter Download PDF

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Publication number
EP1806760A1
EP1806760A1 EP07100002A EP07100002A EP1806760A1 EP 1806760 A1 EP1806760 A1 EP 1806760A1 EP 07100002 A EP07100002 A EP 07100002A EP 07100002 A EP07100002 A EP 07100002A EP 1806760 A1 EP1806760 A1 EP 1806760A1
Authority
EP
European Patent Office
Prior art keywords
gas
openings
passage
exhaust
sleeve
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
EP07100002A
Other languages
English (en)
French (fr)
Other versions
EP1806760B1 (de
Inventor
Wolfgang Grieshaber
Victor Hermosillo
Charles R. Hilland
Daniel Schiffbauer
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.)
General Electric Technology GmbH
Original Assignee
Areva T&D SAS
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36956169&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1806760(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Areva T&D SAS filed Critical Areva T&D SAS
Publication of EP1806760A1 publication Critical patent/EP1806760A1/de
Application granted granted Critical
Publication of EP1806760B1 publication Critical patent/EP1806760B1/de
Active 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
    • H01H2033/888—Deflection of hot gasses and arcing products
    • 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

Definitions

  • the invention relates to a gas escape for a circuit breaker, comprising a casing of generally cylindrical shape closed by a bottom at one end and having openings for the escape of the gas, a sheath disposed in the casing for delimiting, internally, a passage central and outer, with the casing, an annular passage surrounding the central passage, a communication being provided in the sleeve near the bottom to achieve a communication of the central passage of the sleeve to the annular passage.
  • the electrical apparatus has a cutoff zone in which a gas is generated by an arc in a nozzle. This gas flows through a channel in a cooling device which is in the form of a cooling tube. This tube has a thick wall in which many through holes are provided for the passage of gas.
  • a device of this type leads to a misuse of the volume enclosed in the exhaust that the hot gases generated by the cut must chase before reaching the exhaust outlet which has sharp edges that lead to field increases such as that an arc may start from these edges to the tank in which the electrical apparatus is housed.
  • the portion of the cooling tube pierced with orifices which can be traversed by hot gases is axially long.
  • the invention relates to an escapement that overcomes these disadvantages. These objects are achieved, according to the invention, in that the envelope comprises two diametrically opposed openings located in a horizontal plane.
  • the escapement does not comprise, as in the prior art, a large number of small orifices having resistance to the flow of gases, but unlike large diameter openings whose radii of curvature can be rendered large enough to prevent the occurrence of an electric field increase.
  • the radii of curvature are compatible with both the easy escape of the gases and an electrical resistance vis-à-vis the tank that is close.
  • the openings are in a horizontal plane the particles of heavy dust and Derivatives caused by current interruptions are not blown into an area of the tank where other particles have already accumulated.
  • the particles are not expelled outside the exhaust because the gas changes direction several times before reaching the outlet of the exhaust. In each turn the centrifugal forces act on the heavy particles to separate them from the main stream, as in a cyclone.
  • the passage section offered to gas is monotonous and progressively increasing.
  • the passage section available for the flow of gas increases monotonically from the nozzle (the divergent) to a maximum value.
  • the vortexes that create a harmful pressure against and reduce the performance of the cut are thus avoided, the pockets of cold gas, that is to say a part of the volume of the exhaust which contains no hot gas.
  • the hot gas is slowed down and the particles, some of which are conductive, are allowed to remain partly in the exhaust.
  • the passage section offered to the gas does not change by more than a factor of four at each section increase.
  • the two openings formed in the envelope are spaced a certain distance from a bottom of the annular passage. and four radial partitions are provided for, on the one hand, fairing the openings formed in the envelope and, on the other hand, delimit gas passages insulated openings to force the gas to go to the bottom of the passage ring before being able to exit through the openings.
  • the gas follows two different paths out of the exhaust.
  • the gas streams sweep the entire interior volume of the exhaust and prevents pockets of cold gas remaining in the apparatus.
  • the openings formed in the envelope extend over about one-third of the periphery of the envelope.
  • the communication provided in the sleeve near the bottom to make a communication of the central passage of the sleeve towards the annular passage consists of four holes.
  • Figures 1 and 2 show schematically an electrical switchgear, such as a circuit breaker.
  • the electrical equipment is housed in a tank 4 filled with an insulating gas 6 such as, for example, SF 6 .
  • the circuit breaker comprises a movable arcing contact 8 and a fixed arcing contact 10 mounted on three legs 11. During a break, an arc appears between the movable contacts 8 and fixed 10. For this reason, the space between the fixed contact and the movable contact is surrounded by an insulating nozzle or nozzle 12 having a flared end 14. The function of the nozzle 12 is to channel the gas or plasma generated by the electric arc between the fixed contact and the movable contact.
  • the fixed contact 10 is surrounded by a sleeve 16 in which the flared portion 14 of the nozzle 12 slides in the manner of a piston.
  • One end of the sheath 16 is closed by a bottom consisting of a dome 18.
  • a dome 18 In the vicinity of the dome 18 the sheath is pierced with four orifices 20 of substantially rectangular section.
  • a shell 22 of rounded shape Externally to the dome 18 is a shell 22 of rounded shape presenting a large radius of curvature and whose shape is pronounced of an egg.
  • the sheath is surrounded by an envelope 26 which has been shown in perspective in FIG. 3.
  • the envelope 26 has a cylindrical shape coaxial with the axis XX of the circuit breaker.
  • an electrical conductor 28 is connected to the circuit breaker.
  • Two horizontally directed openings 30 are formed in the envelope 26 (only one opening is visible in FIG. 3).
  • two radial partitions 32, 34, 36, 38 have been formed for each opening 30 (see FIGS. 5 and 6). Each partition is directed radially inward and extends to the outer peripheral surface of the sleeve 16, a portion of which can be seen through the opening 30 in FIG.
  • the sleeve defines, internally, a central passage 40 and, externally, an annular passage 42 with the envelope 26.
  • the central passage 40 and the annular passage 42 communicate with each other via the four holes 20 formed at the end of the sheath close to the dome 18.
  • This provides a labyrinth route advantageous as explained above, to allow the deposition of heavy particles suspended in the gas stream and secondly, to achieve a growing monotonous section to avoid trapping pockets of cold gas in the exhaust, particularly in the central passage 40.
  • the annular passage 42 is split into two parts by the two pairs of radial partitions 32 and 34 on the one hand, 36 and 38 on the other hand. Part of this annular channel communicates directly with the openings 30 so that the gas can escape directly.
  • the portion of the annular passage between the radial partitions 32 and 38 on the one hand, the portion of the passage between the partitions 34 and 36 on the other hand constitute two gas passages isolated from the openings 30 in order to constrain the part of the gas which passes through these passages to a bottom 44 of the annular passage opposite the shell 22.
  • the passage section of the holes 30 is about one third of the section of the isolated channels located between the radial partitions 32 and 38 d on the one hand and 34 and 36 on the other.
  • the passage section of the insulated channels is substantially twice that of the outlet ports 30.
  • the passage section offered to gas is monotonous growing. Indeed, the section of the annular channel 42 is substantially greater than the cross section of the central passage 40.
  • the radii of curvature are important which facilitates the flow of gas.
  • the radial partitions 32 themselves are provided with large radii of curvature relative to the outer peripheral surface of the envelope 26 so that at no point does an electric field concentration appear.
  • This device is as follows. During a break, an arc appears between the movable contact 8 and the fixed contact 10. A quantity of hot gas is generated. It is propagated from the nozzle 12 in the sleeve 16 that it runs along its entire length until it reaches the dome 18 on which it is oriented perpendicularly so as to pass through the orifices 20. The jet of gas then strikes the rounded portions of the shell 22 making a first change of direction. The gas then travels through the annular passage 42. A portion of the gas exits directly through the orifices 30 while the remaining portion of the gas flows to the bottom 44 in which it undergoes a second change of direction. The gas then returns to the orifices 30 passing over the radial partitions 32, 34, 36, 38 and leaves through the openings 30.
EP07100002.0A 2006-01-06 2007-01-02 Gasaustritt für Schalter Active EP1806760B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0650056A FR2896083B1 (fr) 2006-01-06 2006-01-06 Echappement de gaz pour disjoncteur

Publications (2)

Publication Number Publication Date
EP1806760A1 true EP1806760A1 (de) 2007-07-11
EP1806760B1 EP1806760B1 (de) 2013-12-11

Family

ID=36956169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07100002.0A Active EP1806760B1 (de) 2006-01-06 2007-01-02 Gasaustritt für Schalter

Country Status (4)

Country Link
US (1) US8063335B2 (de)
EP (1) EP1806760B1 (de)
CN (1) CN100565745C (de)
FR (1) FR2896083B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2063445A1 (de) 2007-11-22 2009-05-27 Areva T & D SA Hochspannungs-Schutzschalter mit verbessertem Gasaustritt
EP2256776A1 (de) 2009-05-26 2010-12-01 Areva T&D Sas Hochspannungsschutzschalter mit verbessertem Gasaustritt
US9673006B2 (en) 2015-01-23 2017-06-06 Alstom Technology Ltd Exhaust diffuser for a gas-insulated high voltage circuit breaker
US10431963B2 (en) 2015-02-19 2019-10-01 Abb Schweiz Ag Exhaust system for switchgear enclosure, and switchgear enclosure having the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2966972B1 (fr) * 2010-10-27 2013-07-19 Areva T & D Sas Appareillage electrique sous enveloppe metallique comportant au moins un capot pare-effluve assurant des echanges convectifs
JP2014089899A (ja) * 2012-10-31 2014-05-15 Hitachi Ltd ガス遮断器
EP3503153B1 (de) * 2017-12-22 2021-09-01 ABB Power Grids Switzerland AG Gasisolierter hoch- oder mittelspannungsleistungsschalter
CN108987152B (zh) * 2018-07-31 2020-10-27 平高集团威海高压电器有限公司 一种灭弧室和断路器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471187A (en) * 1981-09-30 1984-09-11 Sprecher & Schuh Ag Gas-blast switch
JPH01134829A (ja) * 1987-11-18 1989-05-26 Mitsubishi Electric Corp ガス遮断器
US20020113040A1 (en) 2001-02-22 2002-08-22 Masaoki Imamura Gas circuit breaker
US20030127430A1 (en) * 2002-01-09 2003-07-10 Kenji Iwabuchi Gas-blast circuit-breaker
WO2003096366A1 (de) * 2002-05-08 2003-11-20 Siemens Aktiengesellschaft Elektrisches schaltgerät mit einer kühleinrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03205721A (ja) * 1990-01-08 1991-09-09 Hitachi Ltd ガス遮断器
JPH09231885A (ja) * 1996-02-22 1997-09-05 Hitachi Ltd ガス遮断器
FR2760890B1 (fr) 1997-03-17 1999-04-16 Gec Alsthom T & D Sa Deflecteur pour appareil electrique sous enveloppe metallique, en particulier pour disjoncteur haute tension

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471187A (en) * 1981-09-30 1984-09-11 Sprecher & Schuh Ag Gas-blast switch
JPH01134829A (ja) * 1987-11-18 1989-05-26 Mitsubishi Electric Corp ガス遮断器
US20020113040A1 (en) 2001-02-22 2002-08-22 Masaoki Imamura Gas circuit breaker
US20030127430A1 (en) * 2002-01-09 2003-07-10 Kenji Iwabuchi Gas-blast circuit-breaker
WO2003096366A1 (de) * 2002-05-08 2003-11-20 Siemens Aktiengesellschaft Elektrisches schaltgerät mit einer kühleinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 383 (E - 811) 24 August 1989 (1989-08-24) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2063445A1 (de) 2007-11-22 2009-05-27 Areva T & D SA Hochspannungs-Schutzschalter mit verbessertem Gasaustritt
US8530774B2 (en) 2007-11-22 2013-09-10 Areva T&D Sa High voltage circuit breaker with improved gas exhaust
EP2256776A1 (de) 2009-05-26 2010-12-01 Areva T&D Sas Hochspannungsschutzschalter mit verbessertem Gasaustritt
FR2946181A1 (fr) * 2009-05-26 2010-12-03 Areva T & D Sa Disjoncteur haute tension a echappement de gaz ameliore.
US9673006B2 (en) 2015-01-23 2017-06-06 Alstom Technology Ltd Exhaust diffuser for a gas-insulated high voltage circuit breaker
US10431963B2 (en) 2015-02-19 2019-10-01 Abb Schweiz Ag Exhaust system for switchgear enclosure, and switchgear enclosure having the same

Also Published As

Publication number Publication date
FR2896083B1 (fr) 2009-07-10
US8063335B2 (en) 2011-11-22
FR2896083A1 (fr) 2007-07-13
CN101030501A (zh) 2007-09-05
CN100565745C (zh) 2009-12-02
US20070158310A1 (en) 2007-07-12
EP1806760B1 (de) 2013-12-11

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