US3396253A - Gas blast circuit breaker having both bulged-out portion in hollow insulator and gas flow guide tube adjacent switching members - Google Patents

Gas blast circuit breaker having both bulged-out portion in hollow insulator and gas flow guide tube adjacent switching members Download PDF

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Publication number
US3396253A
US3396253A US472423A US47242365A US3396253A US 3396253 A US3396253 A US 3396253A US 472423 A US472423 A US 472423A US 47242365 A US47242365 A US 47242365A US 3396253 A US3396253 A US 3396253A
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US
United States
Prior art keywords
gas
switching
hollow insulator
circuit breaker
bulged
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.)
Expired - Lifetime
Application number
US472423A
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English (en)
Inventor
Schubert Helmuth
Vitins Janis
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.)
BBC Brown Boveri AG Germany
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Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3396253A publication Critical patent/US3396253A/en
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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
    • H01H33/72—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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle

Definitions

  • An electrical circuit breaker of the gas blast type in cludes a pair of coaxially arranged switching members that separate within a bulged out portion of a hollow insulator which serves as a quenching chamber.
  • a gas supply tube concentrically surrounds one of the switching members which is stationary in radially spaced relation to establish an annular gas flow passageway and the discharge end of this gas supply tube terminates adjacent the end of the stationary switching member so as to deliver the gas to the switching point.
  • the present invention relates to an air blast circuit breaker with at least one switching point located within a hollow insulator, and which comprises a stationary switching member arranged concentrically to the hollow insulator and a movable, nozzle-shaped switching member, having on its contact side an umbrella or dish-shaped expanded portion, wherein an annular channel between the hollow insulator and the stationary switching member serves as air blast supply line to the switching point during the switching off operation and wherein the hollow insulator is expanded within the zone of the switching point.
  • the switching point With air blast circuit breakers it is already known to arrange the switching point within a hollow insulator forming the switching chamber, into which the quenching medium flows from one side 'to effect the switching off.
  • the inner wall of the hollow insulator is here cylindrical in order to produce favorable i.e. essentially laminar flow conditions which essentially eliminates turbulence.
  • quenching chamber insulators have already been constructed with an expanded inner diameter at the desired point, but without designing the insulator with a large diameter over its entire length.
  • the end fittings of the insulator such as flanges and the like, could be kept small, which is also desirable from the viewpoint of the internal stresses affecting the joints.
  • both these postulates namely, favorable flow conditions for the supply 'of the medium and a large inner diameter at the switching point, cannot be met easily at the same time so that hitherto an unsatisfactory compromise had to be accepted.
  • the invention has therefore thet object of providing a simple solution of this problem, thereby avoiding the drawbacks encountered in the known constructions.
  • this object is realized in that 3,396,253 Patented Aug. 6, 1968 'ice there is provided a gas tube protruding into the expanded portion of the hollow insulator, surrounding the stationary member concentrically and extending to near the contact end of the movable switching member.
  • a gas tube protruding into the expanded portion of the hollow insulator, surrounding the stationary member concentrically and extending to near the contact end of the movable switching member.
  • a tubular hollow insulator 1 the center portion of which is expanded or bulged, contains a stationary, nozzleshaped switching member 2 and a movable switching member 3, having on its contact side an umbrella-shaped expanded part 3a.
  • the switching member 2 is concentrically surrounded by a cylindrical gas supply tube 4 which projects into the bulging portion of the hollow insulator 1 and extends to near the upper contact end of the switching member 2.
  • This gas supply tube 4 may be made of metal and is firmly mounted in the lower cylindrical part of the hollow insulator 1. If this is desirable from the point of view of the internal electric strength of the switching chamber, the gas supply tube 4 may also be made of insulating material.
  • the gas supply tube 4 may also be equipped with radial bores 4a, whereby the possibility of deposits, such as of metal vapor, is avoided in the space between the gas supply tube 4 and the hollow insulator 1.
  • the annular channel 5 serving for supplying the quenching medium may contain a conical equalizing grating 6, made of perforated sheet metal and serving for the equalizing of the flow of pressurized gas, as known in the art.
  • this grating 6 extends to near the switching point whereby its efiiciency is substantially increased.
  • pressurized gas is supplied through the annular channel 5.
  • the gas supply tube 4 is cylindrical, i.e. it has a uniform diameter and is concentric with the tubular switching member 2 which is also cylindrical, the gas flow through the annular channel 5 to the point at which the switching members separate will be esssentially laminar, i.e. without turbulence notwithstanding the fact that the interior of the hollow insulator insulator 1 is bulged out in the vicinity of such point.
  • the pressurized gas flows through the equalizing grating 6 and enters between the opening switching members 2 and 3, Where it is deflected by the umbrella-shaped wider portion 3a and escapes through the interior of the switching members.
  • the movable switching member 3a is thereby moved longitudinally of itself into the switched off position as depicted in the drawing. To this end, it is equipped with an actuating piston, such as known in the art, and not shown in detail.
  • the arc forming between the separating members 2 and 3 is blown, as known per se, in opposite directions into the interior of the switching members and is quenched.
  • the switchgear members 2 and 3 open only for a short duration during the switching off, and these cooperate, as known in the art, with a serially connected electric voltage isolating switching device.
  • the power switching members 2 and 3 re-close again after a short period, for example, under the action of a closing spring, not shown in detail, when the supply of pressurized gas is discontinued and the voltage isolating switch has taken over the insulation of the disconnected switch.
  • the fixed switching member 2 may be a solid switching pin, in which event the pressurized gas discharges solely through the interior of the hollow switching member 3.
  • an electrical circuit breaker of the gas blast type comprising a generally cylindrical hollow insulator, a pair of switching members arranged coaxially within said hollow insulator and spaced from the inner wall thereof, one of said switching members being hollow and including an umbrella shaped nozzled end adapted to be moved longitudinally of itself into and out of engagement with the confronting end of the other and stationary cylindrical switching member at a bulged-out part of the interior of said hollow insulator, and a cylindrical pressurized gas supply tube located within said hollow insulator and which concentrically surrounds said stationary switching member in radially spaced relation to establish an annular gas flow passageway therebetween, the end of 20 5 5 said gas supply tube terminating adjacent that end of said stationary switching member which engages the nozzled end of said movable switching member and serving to deliver the pressurized gas to the switching point established by said switching members.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US472423A 1964-07-24 1965-07-16 Gas blast circuit breaker having both bulged-out portion in hollow insulator and gas flow guide tube adjacent switching members Expired - Lifetime US3396253A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH970364A CH410110A (de) 1964-07-24 1964-07-24 Druckgasschalter mit mindestens einer innerhalb eines Hohlisolators befindlichen Schaltstelle

Publications (1)

Publication Number Publication Date
US3396253A true US3396253A (en) 1968-08-06

Family

ID=4354727

Family Applications (1)

Application Number Title Priority Date Filing Date
US472423A Expired - Lifetime US3396253A (en) 1964-07-24 1965-07-16 Gas blast circuit breaker having both bulged-out portion in hollow insulator and gas flow guide tube adjacent switching members

Country Status (4)

Country Link
US (1) US3396253A (de)
CH (1) CH410110A (de)
DE (2) DE1205605B (de)
GB (1) GB1070265A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513276A (en) * 1966-07-27 1970-05-19 Bbc Brown Boveri & Cie Compressed gas actuated circuit breaker
US20090107957A1 (en) * 2007-10-31 2009-04-30 Areva Energietechnik Gmbh High-voltage circuit breaker
US10796869B2 (en) 2016-12-22 2020-10-06 Siemens Aktiengesellschaft Electrical switching device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH531246A (de) * 1971-05-12 1972-11-30 Bbc Brown Boveri & Cie Druckgasschalter mit einer Düsenkontaktanordnung
JPH01213927A (ja) * 1988-02-23 1989-08-28 Mitsubishi Electric Corp 碍子形ガスしや断器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481996A (en) * 1944-04-22 1949-09-13 Ferguson Pailin Ltd Air blast circuit breaker
US2533545A (en) * 1948-12-07 1950-12-12 Allis Chalmers Mfg Co Circuit breaker with lever type current connection
DE1064592B (de) * 1958-11-18 1959-09-03 Bbc Brown Boveri & Cie Druckluftschalter mit geschlossener Loeschkammer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE659675C (de) * 1938-05-07 Voigt & Haeffner Akt Ges Kuehleinrichtung fuer die Abgase von Druckgasschaltern
DE607703C (de) * 1927-02-04 1935-01-05 Sigwart Ruppel Dipl Ing Schalter mit Lichtbogenloeschung durch Druckgas
DE606982C (de) * 1931-02-23 1934-12-14 Erwin Marx Dr Ing Einrichtung zur einmaligen Lichtbogenloeschung mit Hilfe eines gasfoermigen, stroemenden Loeschmittels und mit Hohlelektroden
DE675371C (de) * 1937-07-04 1939-05-06 Voigt & Haeffner Akt Ges Druckgasduesenschalter mit einem an der Aussenseite des ortsfesten Kontaktes gelagerten UEberbrueckungskontakt
DE676353C (de) * 1938-04-26 1939-06-02 Studiengesellschaft Fuer Hochl Druckgasschalter mit Fremdbeblasung
BE471742A (de) * 1944-02-24
DE1011035B (de) * 1953-03-31 1957-06-27 Licentia Gmbh Elektrischer Hochleistungsschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481996A (en) * 1944-04-22 1949-09-13 Ferguson Pailin Ltd Air blast circuit breaker
US2533545A (en) * 1948-12-07 1950-12-12 Allis Chalmers Mfg Co Circuit breaker with lever type current connection
DE1064592B (de) * 1958-11-18 1959-09-03 Bbc Brown Boveri & Cie Druckluftschalter mit geschlossener Loeschkammer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513276A (en) * 1966-07-27 1970-05-19 Bbc Brown Boveri & Cie Compressed gas actuated circuit breaker
US20090107957A1 (en) * 2007-10-31 2009-04-30 Areva Energietechnik Gmbh High-voltage circuit breaker
CN101425426B (zh) * 2007-10-31 2013-06-12 阿雷瓦能源技术有限责任公司 高压功率断路器
US8779316B2 (en) 2007-10-31 2014-07-15 Alstom Grid Gmbh High-voltage circuit breaker
US10796869B2 (en) 2016-12-22 2020-10-06 Siemens Aktiengesellschaft Electrical switching device

Also Published As

Publication number Publication date
DE1205605B (de) 1965-11-25
CH410110A (de) 1966-03-31
DE6603028U (de) 1969-08-07
GB1070265A (en) 1967-06-01

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