EP2063445A1 - Hochspannungs-Schutzschalter mit verbessertem Gasaustritt - Google Patents

Hochspannungs-Schutzschalter mit verbessertem Gasaustritt Download PDF

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Publication number
EP2063445A1
EP2063445A1 EP20080169248 EP08169248A EP2063445A1 EP 2063445 A1 EP2063445 A1 EP 2063445A1 EP 20080169248 EP20080169248 EP 20080169248 EP 08169248 A EP08169248 A EP 08169248A EP 2063445 A1 EP2063445 A1 EP 2063445A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
casing
gas
insulating
insulating 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
EP20080169248
Other languages
English (en)
French (fr)
Other versions
EP2063445B1 (de
Inventor
Wolfgang Grieshaber
Roger Ledru
Steven Grosick
Nicklas Davison
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
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Filing date
Publication date
Application filed by Areva T&D SAS filed Critical Areva T&D SAS
Publication of EP2063445A1 publication Critical patent/EP2063445A1/de
Application granted granted Critical
Publication of EP2063445B1 publication Critical patent/EP2063445B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/74—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in 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
    • H01H33/88—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

Definitions

  • the invention relates to the field of high-voltage circuit breakers under metal tanks, type GIS (Gas Insulated Switchgear) or Dead tank type. These circuit breakers can be part of a metal enclosure.
  • GIS Gas Insulated Switchgear
  • Dead tank type can be part of a metal enclosure.
  • the invention relates more particularly to a method for evacuating the hot gases generated by a break in such a circuit breaker and the associated circuit breaker structure.
  • the hot gases i.e., plasma and exhaust gases
  • the hot gases can promote reboots between the various live cut-off parts and the parts connected to the earth such as the metal tank.
  • a first type of arrangement for example provided on Japanese type circuit breakers, such as that disclosed in the patent application JP2003217411 , comprises a short tube implanted at the outlet of the nozzle blowing hot gases and which also makes it possible to blow these directly into the metal tank.
  • the dielectric insulation is obtained by maintaining great distances between the discharge ring formed with the tube and the metal tank.
  • a second type of arrangement for example provided on the "Dead tank” as published in the patent application EP1806760 , allows to have a volume of dielectric gas present in the metal part of the exhaust sufficiently large to absorb all the hot gases generated during the longest arc period of the maximum short-circuit current.
  • This exhaust arrangement includes lateral openings on the side through which the hot gases escape into the interior of the metal vessel.
  • the first type referred to above encloses volumes of insulating gas which are by construction less than the amount of hot gases blown during a break. Therefore, larger overall dimensions of the metal tank than the second type are provided because these hot gases are discharged in an uncontrolled manner, and therefore dimensional safety margins must be taken to ensure dielectric strength to the tank.
  • the closure provided in the arrangement of the second type involves a sufficient volume to keep the hot gases inside the metal part of the exhaust. Also, the dimensional safety margin between the outside of the exhaust and the metal tank can be reduced.
  • the object of the invention is to further reduce the overall dimensions of the exhaust or evacuation of hot gases and also to further reduce the dimensions of the metal vessel.
  • Another object of the invention is to provide a hot gas evacuation solution which has satisfactory cooling while maintaining a satisfactory purge of the cutoff gases between the arcing contacts.
  • the subject of the invention is a method for evacuating hot gases, originating from a break in a high-voltage circuit breaker, comprising a tank metal filled with insulating gas, an envelope comprising gas outlet openings and arranged inside the metal vessel communicating through the openings.
  • insulating gas is sucked from the inside of the casing, parallel to all the hot gas flows from the cut, so as to mix them inside the casing, before their evacuation. through the gas outlet openings of the casing and towards the inside of the metal tank.
  • insulating gas present before cut-off is used in the circuit breaker exhaust structure, a gas which by definition is colder than the hot gases from the cut-off and blends with said hot gases before they escape. towards the inside of the tank.
  • the cold insulating gas already present in the exhaust is simply pushed into the interior of the metal tank by the hot gases, which therefore undergo no cooling by mixing with the insulating gas.
  • the invention is particularly interesting for very large fault currents, i.e. maximum fault currents and the longest arc durations.
  • the invention also relates to a high voltage circuit breaker, particularly adapted to the implementation of the method according to the invention.
  • the deflector (s) thus provided within the scope of the invention thus force the insulating gas, sucked from the opening passage, to be completely deflected and to flow parallel to the flow of hot gases generated by blowing before their subsequent mixing inside the envelope and their exit through the openings provided.
  • the gas outlet openings are made at one of the longitudinal ends of the envelope.
  • the opening passage may comprise a plurality of holes distributed uniformly at the periphery of the sheath.
  • the hot gases leaving the nozzle blowing the gas at high speed can suck the colder insulating gas from the outside of the exhaust (that is to say between the sheath and the casing) and through the portion of the gas return passage (that is to say from the bowl to the openings) and the through holes.
  • two deflectors coaxial with respect to the axis of translation of the moving contact are provided, one of the two baffles comprising at least one indentation made at one of its longitudinal ends, the arrangement being realized between the casing, the sheath and the two baffles creating a baffle insulating gas supply through the notch.
  • one of the two arcing contacts is fixed to the casing and the other is movable in translation along the axis.
  • the two arc contacts are movable in translation along an axis.
  • the invention finally relates to a circuit breaker module as described above, which comprises the casing, the sheath and the baffles.
  • modules for implementing the method of the invention are advantageous because they are of a lower cost of implementation because in particular the molding of parts is reduced and that the assembly between the different parts is simplified.
  • the module comprising six metal parts has the advantage of having simpler moldings.
  • a circuit breaker 1 is shown in a metal envelope (GIS).
  • This high-voltage circuit breaker 1 comprises a metal tank 2 filled with an insulating gas (GI), an envelope 3 comprising gas outlet openings 30.
  • the envelope is arranged inside the metal tank and communicates with the gas outlet openings for evacuating insulating or hot gases (GI and GC represented by the arrows). More exactly, in this embodiment according to the figure 1 , the gas outlet openings are made at the periphery of the casing 3 near its longitudinal end 3b which is closest to the cutoff zone.
  • the circuit breaker 1 also comprises a pair of arcing contacts of which only the fixed contact 40 is represented ( figure 1 ) and is fixed to the casing 3.
  • the other movable contact in translation along the axis XX ' is integral with an insulating nozzle 41 provided for blowing hot gases generated during the separation of the contacts.
  • the suction means 5 comprise a sheath 50 surrounding the fixed contact 40 and arranged inside the casing 3 by defining a through passage 6 via a plurality of through holes 500 distributed uniformly to the
  • the suction means also comprise a single deflector in the form of a tubular portion 51, arranged inside the sheath, so that the hot gases (GC) suck insulating gas (GI) from the holes 500, that is to say exclusively from inside the casing 3, the baffle 51 deflects the insulating gas (GI) sucked parallel to the flow of hot gases.
  • GC hot gases
  • GI insulating gas
  • the arrangement of the deflector 51 in the sheath 50 is thus provided so that only the insulating gas (GI) coming from the inside of the casing 3 is sucked up and not for example the gases at the periphery of the nozzle 41. Then, the insulated and deflected insulating gas mixes with the hot gases inside the casing 3.
  • GI insulating gas
  • the hot gases GC leaving the nozzle 41 at high speed can suck the insulating gas, colder, respectively, from the outside of the exhaust (that is to say between the sleeve 50 and the envelope 3 ), through the portion of the gas return passage (i.e. from the bowl 3a to the side openings) and then through the through holes 500.
  • the gas outlet openings 30 are made at one of the longitudinal ends 3a of the casing 3 and the suction means comprise two baffles 51, 52 coaxial with the axis XX 'of translation of the movable contact and of the nozzle 41, one of the two deflectors 52 comprising a plurality of notches 520 made at one of its longitudinal ends 52a, the arrangement formed between the casing, the sleeve and the two baffles 51, 52 creating a baffle 7 insulating gas supply by the notches 520 (see bent arrows on Figures 2A and 2C for example).
  • one of the two baffles 51 comprises two parts of the walls 510, 511 parallel to each other.
  • the other deflector 52 is arranged between these two parts of the walls 510, 511 parallel so that the insulating gas supply baffle, or suction baffle 7, is shaped in Z with the interior of the sleeve 50 parallel to the wall 511 (see for example the Figure 2A ).
  • the module 8 according to the invention is obtained from six metal parts interleaved and screwed together. Of these, three pieces are molded. One forms a cover 80 including the gas outlet openings 30. The other part 81 forms part of the sheath 50 with a base 50A to which the fixed arcing contact can be fixed, and a part 511 of one of the two deflectors 51. The last molded part comprises another part 510 of the deflector 51 in which the nozzle 41 can slide. Finally, three tubular pieces respectively form the envelope 3, the other part of the sleeve 50 and the other deflector 52, each made from a rolled sheet.
  • the module 8 'according to the invention is obtained from five metal parts nested and screwed together. Of these, two pieces are molded ( FIG. 3A and FIG. 3B ). One forms a lid 80 'comprising the gas outlet openings 30 ( figure 3A ). The other part 81 'forms part of the sleeve 50 with a base 50A to which the fixed arc contact 40 can be fixed. The other part comprises integrally one of the two baffles 51, a part 510 in which the insulating nozzle can slide. Finally, three tubular pieces respectively form the envelope 3 ( figure 3C ), the other part of the sleeve 50 ( 3D figure ) and the other baffle 52 ( figure 3E ), each made from a rolled sheet.
  • the suction means 5 which are provided in the different embodiments are mechanical means which, as arranged in the metal vessel, consist in producing a suction of all the hot gases by the cold insulating gases.
  • the mechanical means provided deflector (s)
  • the mechanical means provided can define paths traveled on the one hand, by the hot gases from the blowing nozzle to the outlet of the tank and other on the other hand, by the cold insulating gases from their suction inlet (baffle inlet 7 in the embodiment of the figure 2 ) to the outlet of the tank which are approximately the same length.
  • the invention shortens the exhaust of a high-voltage circuit breaker, which also reduces the longitudinal size of the associated metal vessel. This is particularly important in order to meet the transport requirements, before their installation in-situ, tanks called "Dead Tank".

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  • Circuit Breakers (AREA)
EP08169248.5A 2007-11-22 2008-11-17 Hochspannungs-Schutzschalter mit verbessertem Gasaustritt Active EP2063445B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0759228A FR2924267A1 (fr) 2007-11-22 2007-11-22 Disjoncteur haute tension a echappement de gaz ameliore

Publications (2)

Publication Number Publication Date
EP2063445A1 true EP2063445A1 (de) 2009-05-27
EP2063445B1 EP2063445B1 (de) 2017-01-04

Family

ID=39627699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08169248.5A Active EP2063445B1 (de) 2007-11-22 2008-11-17 Hochspannungs-Schutzschalter mit verbessertem Gasaustritt

Country Status (3)

Country Link
US (1) US8530774B2 (de)
EP (1) EP2063445B1 (de)
FR (1) FR2924267A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110828228A (zh) * 2019-10-29 2020-02-21 覃向阳 一种真空灭弧室触头保护装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3030869B1 (fr) * 2014-12-19 2017-02-10 Alstom Technology Ltd Disjoncteur comprenant un capot d'echappement de gaz a ouverture obturable
US9673006B2 (en) * 2015-01-23 2017-06-06 Alstom Technology Ltd Exhaust diffuser for a gas-insulated high voltage circuit breaker
DE102018219832A1 (de) * 2018-11-20 2020-05-20 Siemens Aktiengesellschaft Unterbrechereinheit eines Leistungsschalters

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236053A (en) 1977-09-02 1980-11-25 Hitachi, Ltd. Puffer type gas circuit breaker
DE2947957A1 (de) 1979-05-22 1980-12-04 Sprecher & Schuh Ag Druckgasschalter
DE9314779U1 (de) 1993-09-24 1993-11-25 Siemens Ag Hochspannungs-Leistungsschalter mit einer Kühleinrichtung zur Kühlung des Löschgases
JP2003217411A (ja) 2002-01-18 2003-07-31 Toshiba Corp ガス遮断器
EP1185996B1 (de) 1999-06-11 2003-09-10 Siemens Aktiengesellschaft Hochspannungsleistungsschalter mit einem abströmkanal
EP1768150A1 (de) * 2005-09-26 2007-03-28 ABB Technology AG Hochspannungsschalter mit verbesserter Schaltleistung
EP1806760A1 (de) 2006-01-06 2007-07-11 Areva T&D Sa Gasaustritt für Schalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW280920B (de) * 1995-01-20 1996-07-11 Hitachi Seisakusyo Kk
FR2807870B1 (fr) * 2000-04-18 2002-05-24 Alstom Interrupteur a soufflage d'arc, possedant une chambre de coupure a compression de gaz reduite et un mouvement alternatif du piston

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236053A (en) 1977-09-02 1980-11-25 Hitachi, Ltd. Puffer type gas circuit breaker
DE2947957A1 (de) 1979-05-22 1980-12-04 Sprecher & Schuh Ag Druckgasschalter
DE9314779U1 (de) 1993-09-24 1993-11-25 Siemens Ag Hochspannungs-Leistungsschalter mit einer Kühleinrichtung zur Kühlung des Löschgases
EP1185996B1 (de) 1999-06-11 2003-09-10 Siemens Aktiengesellschaft Hochspannungsleistungsschalter mit einem abströmkanal
JP2003217411A (ja) 2002-01-18 2003-07-31 Toshiba Corp ガス遮断器
EP1768150A1 (de) * 2005-09-26 2007-03-28 ABB Technology AG Hochspannungsschalter mit verbesserter Schaltleistung
EP1806760A1 (de) 2006-01-06 2007-07-11 Areva T&D Sa Gasaustritt für Schalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110828228A (zh) * 2019-10-29 2020-02-21 覃向阳 一种真空灭弧室触头保护装置
CN110828228B (zh) * 2019-10-29 2021-06-08 浙江泰控电气有限公司 一种真空灭弧室触头保护装置

Also Published As

Publication number Publication date
FR2924267A1 (fr) 2009-05-29
US8530774B2 (en) 2013-09-10
US20090134123A1 (en) 2009-05-28
EP2063445B1 (de) 2017-01-04

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