US3197596A - Outlet arrangement for an arc quenching chamber - Google Patents

Outlet arrangement for an arc quenching chamber Download PDF

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Publication number
US3197596A
US3197596A US189656A US18965661A US3197596A US 3197596 A US3197596 A US 3197596A US 189656 A US189656 A US 189656A US 18965661 A US18965661 A US 18965661A US 3197596 A US3197596 A US 3197596A
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US
United States
Prior art keywords
slider
outlet passage
chamber
quenching
pressure
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
US189656A
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English (en)
Inventor
Lange Emil
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.)
National Industri AS
Original Assignee
National Industri AS
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 National Industri AS filed Critical National Industri AS
Application granted granted Critical
Publication of US3197596A publication Critical patent/US3197596A/en
Anticipated expiration legal-status Critical
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
    • H01H33/7015—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/20—Investigating the presence of flaws
    • 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
    • H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted
    • 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
    • H01H33/7084—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by movable parts influencing the gas 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
    • H01H33/86—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve
    • 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
    • H01H33/94—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 this movement being effected solely due to the pressure caused by the arc itself or by an auxiliary arc
    • H01H33/95—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 this movement being effected solely due to the pressure caused by the arc itself or by an auxiliary arc the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/38—Means for extinguishing or suppressing arc
    • H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas

Definitions

  • This invention relates to an outlet arrangement for the arc quenching chamber of an electric circuit-breaker of the kind in which at least one are is quenched by fluid quenching medium flowing towards and through an outlet passage of the quenching chamber under pressure produced by the are or arcs.
  • the invention is intended to provide an improved outlet arrangement such that the arc is quenched efiiciently both when the current being interrupted is the same as or only slightly exceeds that normally carried by the circuit and when the current is greatly excessive, for example in the event of a short-circuit.
  • the choke element has a passage of smaller cross-section than the outlet passage, and it is very advantageous if the choke element is held by holding means which yield suddenly upon the said pressure exceeding the said limit.
  • FIGURES l, 2 and 3 being sectional elevations of a switch embodying the invention, in the closed position, during breaking of a normal current, and during breaking of an excessive current, respectively, and
  • FIGURES 4 and 5 being respectively a sectional elevation and an end View of an electric safety fuse embodying two arrangements in accordance with the invention.
  • the switch shown in FIGURES l to 3 comprises an arc quenching chamber 1 full of fluid quenching medium and provided with a fixed annular contact 2 near to an outlet passage 3 and penetrated by an axially movable switch pin 4 having an arc terminal 6 and a contact surface 5 which engages the contact 2.
  • a choke element 7 with a tubular terminal 12 and a passage 8 of smaller cross-section than the passage 3 is held by holding means comprising a slider 9 which has passages 10 and slides axially on a guide pin 21 secured to a frame or casing 22 fixed to the chamber 1.
  • a valve 11 is axially slidable within the slider 9 and is loaded by a compression spring 13.
  • the slider 9 has external cam surfaces 14, 15 and 16.
  • a deflector 23 is secured inside the casing and has a clearance aperture for the slider 9.
  • the choke element 7 may be connected to a piston sliding in a cylinder containing air which is compressed and then suddenly released when the pressure of the quenching medium exceeds a predetermined limit.
  • the fuse shown in FIGURES 4 and 5 comprises a quenching chamber 26 fitted with contact sleeves 43 and accommodating insulating inserts 44 and 45 and conducting inserts 46, the latter supporting electrodes 32 and 33 by means of radial struts (not shown).
  • the inserts 44 define outlet passages 27 and 28; the insert 45 defines a pressure space 29, and the inserts 46 define storage spaces 30 and 31.
  • By means of screws 40 apertured rupturable retainers 38 and 39 are secured to the sleeves 43.
  • a fuse wire 41 has one end soldered to the retainer 38 and passes through the interior of the quenching chamber 26 and has its other end secured by one of the screws 40.
  • the pressure produced by the arcs, particularly in the space 29, causes etficient quenching of the arcs in the choke elements 34 3 and 35 but is not sufficient to rupture the retainers 38 and 39.
  • the choke elements 34 and 35 may be of different dimensions, the passages 27 and 28 may be of different dimensions, or the retainers 38 and 39 may be of different strengths, in order to extend the range within which the fuse functions efficiently, and various modifications may be introduced without departing from the invention; preferably cages or the like are provided for catching the choke elements 34 and 35 when the latter are expelled, and the choke elements are formed of material which under the action of the arcs generates gas which aids the quenching of the arcs, and they may be formed integrally with the valve elements 36 and 3'7.
  • the quenching medium may be any desired gas or liquid with or without inert or other powder which aids the quenching of'the arcs.
  • an electric switch including an arc-quenching chamber, fluid quenching medium within said chamber, an outlet passage of said chamber, a casing secured to said chamber, a guide pin secured to said casing, a tubular slider mounted on said guide pin for axial movement toward and away from said outlet passage, a tubular choke element carried by said slider for extending with clearance into and partly obturating said outlet passage, cam surfaces on said slider, a plurality of springloaded levers mounted within said casing and each having one end resting on one of said cam surfaces, a plu rality of detent springs each secured to one of said levers and disposed for engaging one of said cam surfaces for resisting displacement of said slider in a direction away from said outlet passage, and a movable switch pin in said chamber for drawing from said choke element an arc creating pressure within said quenching medium upon opening of said electric switch, said slider moving under the pressure of said quenching medium in opposition to said detent springs until upon the pressure of said quenching medium exceeding a predetermined limit said cam surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US189656A 1960-12-02 1961-12-01 Outlet arrangement for an arc quenching chamber Expired - Lifetime US3197596A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL37677A DE1171974B (de) 1960-12-02 1960-12-02 Elektrischer Schalter mit Lichtbogenloeschung durch einen vom Lichtbogen in einer Loesch-kammer erzeugten Loeschmittelstrom
DEL0037804 1960-12-23

Publications (1)

Publication Number Publication Date
US3197596A true US3197596A (en) 1965-07-27

Family

ID=25985379

Family Applications (1)

Application Number Title Priority Date Filing Date
US189656A Expired - Lifetime US3197596A (en) 1960-12-02 1961-12-01 Outlet arrangement for an arc quenching chamber

Country Status (4)

Country Link
US (1) US3197596A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1171974B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB940590A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL272063A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1765621B1 (de) * 1968-06-20 1970-11-26 Siemens Ag Anordnung zum kraftschluessigen Verbinden von Lichtbogenleitblechen mit Festkontaktteilen
CH594281A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1976-05-24 1978-01-13 Bbc Brown Boveri & Cie
DE2858054C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-03-24 1987-11-26 Mitsubishi Denki K.K., Tokio/Tokyo, Jp
DE2811508C2 (de) * 1977-03-24 1983-06-16 Mitsubishi Denki K.K., Tokyo Elektrischer Druckgasschalter
JPS5422581A (en) * 1977-07-21 1979-02-20 Mitsubishi Electric Corp Switching device
US4459447A (en) * 1982-01-27 1984-07-10 Mitsubishi Denki Kabushiki Kaisha Self extinguishing type gas circuit breaker
FR2651065B1 (fr) * 1989-08-18 1996-07-05 Alsthom Gec Disjoncteur a moyenne tension a autosoufflage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1336069A (en) * 1918-04-27 1920-04-06 Nicholas J Conrad Circuit-breaker
US2052232A (en) * 1932-11-11 1936-08-25 Bbc Brown Boveri & Cie Electric switch
US2387589A (en) * 1937-07-19 1945-10-23 Kesselring Fritz Circuit breaker
US2925484A (en) * 1957-05-14 1960-02-16 Bbc Brown Boveri & Cie Air-blast switch with safety valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE527320C (de) * 1931-09-03 Siemens Schuckertwerke Akt Ges Loeschkammer mit Maximaldruckregler
DE572518C (de) * 1928-03-26 1933-03-17 Delle Atel Const Electr Luft- oder OElschalter, dessen Kontakte in einer Explosionskammer untergebracht sind, die mit einem besonderen Blastopf in Verbindung steht, der beim Schaltvorgang von der Explosionskammer aus durch denselben Lichtbogen unter Druck gesetzt wird, der geloescht werden soll
DE687404C (de) * 1931-07-17 1940-01-29 Licht Und Kraft Akt Ges Elektrischer Schalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1336069A (en) * 1918-04-27 1920-04-06 Nicholas J Conrad Circuit-breaker
US2052232A (en) * 1932-11-11 1936-08-25 Bbc Brown Boveri & Cie Electric switch
US2387589A (en) * 1937-07-19 1945-10-23 Kesselring Fritz Circuit breaker
US2925484A (en) * 1957-05-14 1960-02-16 Bbc Brown Boveri & Cie Air-blast switch with safety valve

Also Published As

Publication number Publication date
DE1171974B (de) 1964-06-11
NL272063A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB940590A (en) 1963-10-30

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