EP1158556A1 - Isolierstoffblasdüse für Lastschalter - Google Patents

Isolierstoffblasdüse für Lastschalter Download PDF

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Publication number
EP1158556A1
EP1158556A1 EP01400987A EP01400987A EP1158556A1 EP 1158556 A1 EP1158556 A1 EP 1158556A1 EP 01400987 A EP01400987 A EP 01400987A EP 01400987 A EP01400987 A EP 01400987A EP 1158556 A1 EP1158556 A1 EP 1158556A1
Authority
EP
European Patent Office
Prior art keywords
conical part
neck
circuit breaker
conical
contacts
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Withdrawn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
EP01400987A
Other languages
English (en)
French (fr)
Inventor
Denis Dufournet
Michel Perret
Wolfgang Grieshaber
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 SA
Original Assignee
Alstom 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 Alstom SA filed Critical Alstom SA
Publication of EP1158556A1 publication Critical patent/EP1158556A1/de
Withdrawn legal-status Critical Current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
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions

Definitions

  • the present invention relates to an insulating blowing nozzle for circuit breaker.
  • the invention applies in particular to high circuit breakers voltage, equal to or greater than 300 kV, and comprising only one pole break.
  • the nozzle must allow cutting throughout the window required interruption and for currents up to the power value short circuit break.
  • European patent EP 0 028 039 describes a gas circuit breaker tablet comprising an insulating blowing nozzle with an internal profile includes a cylindrical part followed by a conical part, then again of a cylindrical part.
  • the present invention provides an insulating nozzle ensuring in the downstream part of the insulating nozzle better gas flow and a field improved temperature, allowing the circuit breaker to hold a voltage higher after the power failure.
  • the subject of the invention is therefore an insulating blowing nozzle for circuit breaker, the circuit breaker comprising a first arcing contact and a second arcing contact separating from each other when opening of the circuit breaker and after a prior separation of contacts permanent, said insulating blowing nozzle being integral with one of the permanent contacts and having the general shape of a cone comprising a neck and delimiting a volume of revolution comprising an upstream part and a downstream part separated by the neck where the internal volume is cylindrical and blocked by the second arcing contact when the circuit breaker is closed and for a few milliseconds after the separation of the arcing contacts, the wall of the nozzle, in its part delimiting the upstream part of said volume of revolution, surrounding said first arcing contact, the downstream part of said volume comprising a first conical part, characterized in that said first conical part is followed by a second conical part having a angle more open than that of said first conical part.
  • the angle of the first conical part is between 8 and 17 ° and preferably between 10 and 12 °
  • the angle of the second part conical is between 12 and 25 ° and preferably between 14 and 17 °.
  • the length of said neck as well as the length of the first conical part and the length of the second conical part are dimensioned in such a way that the end of the second arcing contact is inside the first part conical during an arc duration between a minimum arc duration and an average arc duration and inside the second conical part during of an arc duration between the average arc duration and a duration maximum arc.
  • the first conical part starting after said cylindrical portion starts with an internal diameter greater than the internal diameter of the cylindrical portion thereby forming a abrupt withdrawal at the outlet of the cylindrical portion.
  • the cut will be definitive at the next passage by 0 of the current, that is to say - say at point t 3 , but if the separation of the contacts takes place less than 9 ms before the next passage by 0 of the current (for example, at time t 1 , 8 ms before the passage by 0 of the current), the arc will reboot after t ' 1 and the cut will not be final until t 3 .
  • the arc duration can therefore vary from 9 ms to 18 ms, and even up to 19 ms- ⁇ if the separation takes place immediately after t 0 located at 9 ms before t ' 1 .
  • FIG. 2 we partially see a circuit breaker and more particularly the contact parts and the insulating nozzle of the invention.
  • first arcing contact 1 called moving arcing contact
  • first permanent contacts 2 called contacts permanent mobiles
  • second contact arcing 3 said fixed arcing contact
  • second permanent contacts 4 called permanent fixed contacts
  • blowing nozzle 5 is linked to the permanent mobile contacts 2.
  • Contacts 2 and 4 are said to be permanent because it is through them that passes mainly the current when the circuit breaker is in the closed position as shown in fig. 2. When the circuit breaker opens, these contacts permanent 2 and 4 separate first before contact separation arcs 1 and 3 between which an arc forms at the time of their separation and until the final cut.
  • contacts 1 and 2 are also said to be mobile and contacts 3 and 4 are said to be fixed because, at the time of opening, only contacts 1 and 2 move, to the right of the figure.
  • the nozzle, object of the invention can also be applied to so-called circuit breakers double movement of contacts.
  • the insulating blowing nozzle 5 has, as can be seen, the shape general of a horn delimiting a volume of revolution.
  • Nozzle 5 has a neck 6 which separates the volume of revolution into an upstream part 7 and a downstream part 8.
  • the internal volume is cylindrical and, in closed position of the circuit breaker, as shown in fig. 2, it is blocked by the fixed arcing contact 3 as well as for a few milliseconds after the separation of contacts 1 and 3.
  • the downstream part 8 of the internal volume delimited by the nozzle 5 comprises a first conical part 8a, immediately succeeding the neck 6, having a angle between 8 and 17 ° and preferably between 10 and 12 °.
  • This last part 8a is followed by a second part 8b also conical and whose the angle is between 12 and 25 ° and preferably between 14 and 17 °.
  • the length of the different parts: col 6 as well as the first part conical 8a and the second conical part 8b, are calculated, taking into account the separation speed of the contacts, so that the end of the second arcing contact 3 is located inside the first conical part 8a, as shown in fig. 3 in the period of time between the duration minimum arc and the average arc duration after contact separation, that is to say roughly in the time period between 9 ms and 13.5 at 14 ms after contact separation for a 50 Hz network, depending on the diagram in fig. 1, and so that this same end of the second contact arc 3 is located inside the second conical part 8b, as shown in fig. 4, in the period of time between the average duration of arc and the maximum arc duration after the separation of the contacts and therefore approximately in the period of time after contact separation included between 13.5 ms and 18 to 19 ms.
  • the cylindrical part, at the neck 6, is blocked by the contact 3 during a few milliseconds after the separation of the contacts, we thus transmit the energy of the arc at the blowing volume without the gas being able to escape through the nozzle, a pressure rise is therefore obtained.
  • the first conical part 8a makes it possible to maintain a sufficient overpressure while maintaining a gas temperature acceptable and avoiding turbulence
  • the second conical part 8b more open, avoids too high pressure at the nozzle outlet, thus avoiding breakdown of the dielectric from insufficient gas evacuation hot in the divergent part of the nozzle.
  • Fig. 5 shows a nozzle in isolation and in a variant of the invention.
  • the first conical part 8a which begins immediately after neck 6, begins with an internal diameter greater than that of the neck 6. There is therefore a sudden drop 10 at the exit of the neck 6. This allows an intense blowing as soon as it comes out of contact 3 of the neck 6 of the nozzle and thus allows a shorter possible arc duration.

Landscapes

  • Circuit Breakers (AREA)
EP01400987A 2000-05-25 2001-04-18 Isolierstoffblasdüse für Lastschalter Withdrawn EP1158556A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0006684A FR2809531B1 (fr) 2000-05-25 2000-05-25 Buse isolante de soufflage pour disjoncteur
FR0006684 2000-05-25

Publications (1)

Publication Number Publication Date
EP1158556A1 true EP1158556A1 (de) 2001-11-28

Family

ID=8850601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400987A Withdrawn EP1158556A1 (de) 2000-05-25 2001-04-18 Isolierstoffblasdüse für Lastschalter

Country Status (4)

Country Link
US (1) US6483064B2 (de)
EP (1) EP1158556A1 (de)
CN (1) CN1326206A (de)
FR (1) FR2809531B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2922679A1 (fr) * 2008-04-15 2009-04-24 Areva T & D Sa Chambre de coupure de disjoncteur a la tenue en tension transitoire de retablissement amelioree.

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0225088D0 (en) * 2002-10-29 2002-12-04 Univ Liverpool circuit breaker
EP1544881B1 (de) * 2003-12-19 2007-01-24 ABB Technology AG Gasisolierte Schaltovrrichtung mit einer Düse
EP1630840B1 (de) * 2004-08-23 2006-12-20 ABB Technology AG Hochleistungsschalter mit Bewegungsumkehr
EP1814132B1 (de) * 2006-01-31 2008-12-17 ABB Technology AG Schaltkammer für einen gasisolierten Hochspannungsschalter
WO2009124582A1 (de) * 2008-04-07 2009-10-15 Abb Research Ltd Gasisolierter hochspannungsschalter
FR2980033B1 (fr) 2011-09-12 2013-12-06 Alstom Grid Sas Chambre de coupure pour disjoncteur
EP2837011B1 (de) * 2012-04-11 2017-06-14 ABB Schweiz AG Schutzschalter
DE112013001981T5 (de) * 2012-04-11 2015-03-12 Abb Technology Ag Leistungsschalter
WO2018015436A1 (en) * 2016-07-21 2018-01-25 Abb Schweiz Ag Gas-insulated high-voltage switching device with improved main nozzle
US11462377B2 (en) * 2018-09-07 2022-10-04 General Electric Technology Gmbh Electric arc-blast nozzle made of a material comprising micro-capsules of liquid (CF3)2CFCN and a circuit breaker including such a nozzle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370352A1 (fr) * 1976-11-09 1978-06-02 Merlin Gerin Interrupteur a autosoufflage
EP0028039A1 (de) * 1979-10-25 1981-05-06 BBC Aktiengesellschaft Brown, Boveri & Cie. Druckgasschalter
EP0135158A2 (de) * 1983-08-24 1985-03-27 Hitachi, Ltd. Gasisolierter Schalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29607660U1 (de) * 1996-04-22 1996-06-20 Siemens Ag Unterbrechereinheit eines Hochspannungs-Leistungsschalters
FR2769403B1 (fr) * 1997-10-02 1999-11-12 Gec Alsthom T & D Sa Interrupteur a gaz comprime avec un engrenage a cremailleres

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370352A1 (fr) * 1976-11-09 1978-06-02 Merlin Gerin Interrupteur a autosoufflage
EP0028039A1 (de) * 1979-10-25 1981-05-06 BBC Aktiengesellschaft Brown, Boveri & Cie. Druckgasschalter
EP0135158A2 (de) * 1983-08-24 1985-03-27 Hitachi, Ltd. Gasisolierter Schalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2922679A1 (fr) * 2008-04-15 2009-04-24 Areva T & D Sa Chambre de coupure de disjoncteur a la tenue en tension transitoire de retablissement amelioree.

Also Published As

Publication number Publication date
US20010045410A1 (en) 2001-11-29
CN1326206A (zh) 2001-12-12
FR2809531A1 (fr) 2001-11-30
US6483064B2 (en) 2002-11-19
FR2809531B1 (fr) 2002-07-05

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