US3708639A - Pressure fluid extinguishing device for a circuit breaker - Google Patents

Pressure fluid extinguishing device for a circuit breaker Download PDF

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Publication number
US3708639A
US3708639A US00106422A US3708639DA US3708639A US 3708639 A US3708639 A US 3708639A US 00106422 A US00106422 A US 00106422A US 3708639D A US3708639D A US 3708639DA US 3708639 A US3708639 A US 3708639A
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US
United States
Prior art keywords
extinguishing device
arc
nozzle
chamber
walls
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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.)
Expired - Lifetime
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US00106422A
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English (en)
Inventor
J Vigreux
B Trolliet
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.)
Cegelec SA
Delle Alsthom SA
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Cegelec 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 Cegelec SA filed Critical Cegelec SA
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Publication of US3708639A publication Critical patent/US3708639A/en
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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

  • ABSTRACT An extinction device for a pressurized gas cut-off appliance has'holes, in its side walls, through which a [30] Forelgn Application Prlomy Data lateral auxiliary flow of sulphur hexafluoride is made Jan. 6, 1970 France ..700l607 to pass.
  • the present invention has as its object to provide an arrangement which makes it possible to considerably reduce the action of the are on the'walls of the extinguishing devices, by moving the arc away from the walls.
  • the extinguishing device comprises orifices arranged in its lateral walls through which an auxiliary transverse blowing action is carried out.
  • each orifice is in communication with a chamber arranged within the wall of the extinguishing device.
  • each chamber is connected to a common internal chamber.
  • this circuit breaker comprises a ring of magnetic material arranged in its mass coaxially with the direction of the arc.
  • the interposing of a sheath of gas between the walls and the arc has as its object to remove the arc from the smooth or stepped walls.
  • the use of a magnetic device also makes it possible to center the arc in the extinguishing device. In this way, the arc tends to keep away from the walls, on the one hand during its existence, which reduces its direct action on the walls and the influence of the. hot gases and the depositing of metallic vapors. More especially, this occurs during the period preceding the passage of the current through zero, that is to say, immediately before the appearance of the tensile stress, which effects a sufficient cooling of the wall and the gases in contact with the latter thus making it possible to withstand the tensile stress without re-striking the arc.
  • FIGS. 1 to 7 are sections taken along the axis of blowing nozzles corresponding to various constructional variants.
  • grooves l are formed in the duct 2 of the nozzle 3 through which the blast fluid passes. These grooves l are in communication with preferably annular chambers such as 4. When the arc develops axially of the duct 2,-gases under pressure heated by the arc enter the grooves l (or otherwise through orifices of any kind communicating with the chambers 4 and taking the place of the grooves 1) into the chambers 4 where they become cooled.
  • the chambers 4 communicate with a chamber 5 which is preferably annular and communicates with all the chambers 4 by means of conduits 6.
  • a chamber 5 which is preferably annular and communicates with all the chambers 4 by means of conduits 6.
  • the delivery of blown gas along the wall of the nozzle can be increased by using the arrangement shown in FIG. 3 and connecting the chamber 5 to the chamber 7 situated upstream of the nozzle and from which the compressed gas comes.
  • a piston 14 sliding in a cylinder 15 compresses the gas and the latter flows both through the duct 2 of the nozzle and into the orifices 8 of considerable cross-section which supply the chamber 5.
  • the element of the nozzle and the auxiliary blowing arrangement are constituted by insulating materials.
  • the discs 9 in contact with the arc are conductive and generally made of metal.
  • the number of discs 9 is greater, in proportion, as the arc voltage is increased, so as to prevent elementary arcs from short-circuiting the conductive discs.
  • FIGS. 1 to 4 make it possible to obtain the result that, after the extinction of the arc, an additional blowing action occurs which cools the wall and the gaseous medium in the nozzle and contributes to preventing re-striking after breaking.
  • nozzle does or does not comprise an auxiliary blowing arrangement as shown in FIGS. 1 to 4, to provide the nozzle with a ring of magnetic material as shown in FIG. 5.
  • This ring promotes the cooling of the walls, improving the centering of the arc mainly when the current is tending towards zero.
  • FIGS. 1 to 5 there is shown by way of example a blowing nozzle comprising a cylindrical duct.
  • a blowing nozzle comprising a duct 16 defining a conical duct.
  • the mobile contact 11 to which the arc is attached after separation of the mobile contact 11 and fixed contact 17 is displaced axially of the duct and during opening is moved progressively away from the insulating wall.
  • a blowing nozzle comprising a conical passage portion 16 prolonged by a cylindrical passage portion 12 forming a deflector for the hot gases and protecting the insulating walls situated in the vicinity such as for example the insulating cylinder 13 which is coaxial with the nozzle and constitutes the envelope of the breaker chamber.
  • blowing nozzles in FIGS. 6 and 7 can be provided'with the improvements described in FIGS. 1 to 5 which are intended to cool the walls and improve the centering of the arc.
  • the various arrangemen ts described may be combined or used separately without departing from the framework of the invention.
  • Breaking tests have shown that the improvement in the centering of the arc, the improvement of the dielectric strength during interruption, the cooling and protection of the insulating walls which result from the adoption of the arrangements described substantially improve the results of the breaking: increase in the amount of current which can be interrupted, reduction in arc time, interruption with increased voltage reestablishment speeds.
  • the same limit break current is obtained with voltage re-establishment speeds of 2, 2.5 and 5 kilovolts per microsecond respectively for a cylindrical nozzle having smooth walls, a divergent conical nozzle having smooth walls and a cylindrical nozzle whose walls are provided with the features of FIGS. 1 or 3.
  • auxiliary blowing means defined by a plurality of transverse grooves within the lateral walls of said nozzle in planes axially spaced from each other, and
  • At least one enlarged chamber provided within said lateral walls and communicating with said transverse grooves.
  • each transverse groove is in communication with an individual enlarged chamber.
  • each individual enlarged chamber is connected to a common internal chamber.
  • each transverse groove is in communication with a common enlarged chamber.
  • blowing fluid is sulphur hexafluoride.

Landscapes

  • Circuit Breakers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US00106422A 1970-01-16 1971-01-14 Pressure fluid extinguishing device for a circuit breaker Expired - Lifetime US3708639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7001607A FR2076494A5 (de) 1970-01-16 1970-01-16

Publications (1)

Publication Number Publication Date
US3708639A true US3708639A (en) 1973-01-02

Family

ID=9049163

Family Applications (1)

Application Number Title Priority Date Filing Date
US00106422A Expired - Lifetime US3708639A (en) 1970-01-16 1971-01-14 Pressure fluid extinguishing device for a circuit breaker

Country Status (7)

Country Link
US (1) US3708639A (de)
BE (1) BE761251A (de)
CA (1) CA934411A (de)
CH (1) CH522284A (de)
ES (1) ES194407Y (de)
FR (1) FR2076494A5 (de)
GB (1) GB1329740A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949182A (en) * 1973-06-14 1976-04-06 Magrini Galileo S.P.A. Breaking chamber for self-blasting compressed gas electric circuit-breakers
US4289942A (en) * 1977-07-29 1981-09-15 Westinghouse Electric Corp. Gas-blast circuit-interrupter with multiple insulating arc-shield construction
US5155312A (en) * 1990-03-13 1992-10-13 Hitachi, Ltd. Puffer type gas circuit interrupter
US10727013B2 (en) * 2016-06-20 2020-07-28 Abb Schweiz Ag Gas-insulated low- or medium-voltage switch with swirling device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2438017C3 (de) * 1974-08-05 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Druckgasschalter
CH617534A5 (en) * 1977-06-24 1980-05-30 Inst Cercetari Moderniza Cut-off chamber for high-voltage electric circuit breaker
CH629910A5 (en) * 1978-06-13 1982-05-14 Sprecher & Schuh Ag Gas-blast circuit breaker
FR2438906A2 (fr) * 1978-10-09 1980-05-09 Merlin Gerin Interrupteur a autosoufflage module equipe d'un ecran a fentes de passage du gaz
CH648153A5 (de) * 1979-04-24 1985-02-28 Sprecher & Schuh Ag Druckgasschalter.
JPS58181222A (ja) * 1982-04-19 1983-10-22 株式会社東芝 直流しや断装置
DE3421356A1 (de) * 1984-05-08 1985-11-14 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Druckgasschalter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150245A (en) * 1957-09-13 1964-09-22 Westinghouse Electric Corp Liquefied gas circuit interrupters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150245A (en) * 1957-09-13 1964-09-22 Westinghouse Electric Corp Liquefied gas circuit interrupters

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949182A (en) * 1973-06-14 1976-04-06 Magrini Galileo S.P.A. Breaking chamber for self-blasting compressed gas electric circuit-breakers
US4289942A (en) * 1977-07-29 1981-09-15 Westinghouse Electric Corp. Gas-blast circuit-interrupter with multiple insulating arc-shield construction
US5155312A (en) * 1990-03-13 1992-10-13 Hitachi, Ltd. Puffer type gas circuit interrupter
US10727013B2 (en) * 2016-06-20 2020-07-28 Abb Schweiz Ag Gas-insulated low- or medium-voltage switch with swirling device

Also Published As

Publication number Publication date
ES194407U (es) 1974-12-01
CH522284A (fr) 1972-06-15
ES194407Y (es) 1975-03-16
GB1329740A (en) 1973-09-12
FR2076494A5 (de) 1971-10-15
CA934411A (en) 1973-09-25
BE761251A (fr) 1971-07-06

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