US2507971A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
US2507971A
US2507971A US675554A US67555446A US2507971A US 2507971 A US2507971 A US 2507971A US 675554 A US675554 A US 675554A US 67555446 A US67555446 A US 67555446A US 2507971 A US2507971 A US 2507971A
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US
United States
Prior art keywords
arc
fluid
openings
housing
circuit breaker
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
US675554A
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English (en)
Inventor
Guillaume Andre
Thibaudat Albert
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.)
Forges et Ateliers de Constructions Electriques de Jeumont SA
Original Assignee
Forges et Ateliers de Constructions Electriques de Jeumont 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.)
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Application filed by Forges et Ateliers de Constructions Electriques de Jeumont SA filed Critical Forges et Ateliers de Constructions Electriques de Jeumont SA
Application granted granted Critical
Publication of US2507971A publication Critical patent/US2507971A/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
    • H01H33/72—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
    • H01H33/75—Liquid-break switches, e.g. oil-break

Definitions

  • This invention which applies to circuit breakers comprising two or more cut-outs in series, relates to means making it possible to bring about an appreciable increase in the circuit breaking speed and capacity, as well as to avoid the drawback pointed out above.
  • Fig. 1 is a somewhat diagrammatic vertical section taken along line B-D of Fig. 2, through an illustrative embodiment of the invention, as applied to a rotating circuit breaker with a plurality vof make-and-break points in a quenching fluid such as oil, and
  • Fig. 2 is a horizontal section along of Fig. 1.
  • the movable equipment is made up of a rotatable insulating shaft I carrying an inclined rod 2 of conductive material, the said rod extending through a bore in shaft I, as shown. Except for the ends thereof, the exposed portions of rod 2 are sheathed in insulating material 2a. The free ends cooperate severally with the double-sided xed contacts 3 and 4. These contacts are of the same double-U type, the several U-shaped sockets, which snugly receive the aforesaid free ends of rod 2, being arranged to open in opposite directions as shown. The contacts 3 and 4 are severally connected with lead wires 5 and 6.
  • the parts are housed in cylindrical insulating receptacle 'I which is filled with oil or other suitable quenching iiuid up to level 8.
  • the inset ends Ia and 'Ib of receptacle 'I are also of insulating material.
  • the parts can be arranged so that the lower arc, formed between the contacts 2 and 4, is started a little sooner than the upper arc, formed between the contacts 2 and 3, so that the upline E-F per arc is at a suitable moment subjected to the extinguishing action engendered by the lower arc.
  • the upper end of contact rod 2 moves in the annular channel 9, Fig. 1, provided in a diskshaped part I2 of insulating material mounted interiorly of end Ia and in juxtaposition thereto.
  • a similar annular channel can be provided in the lower part of the receptacle 'I on the upper face of the inset 1b. Communication between the oil well formed above end 'Ia and the interior of receptacle 'I is realized through the medium of aligned bores I0 and I3 provided respectively in parts I2 and 1a. An arc extinguishing exhaust flow of oil is thus directed to push the upper arc towards the bottom of the channel 9, notwithstanding the shown open form and the relative shallowness of the latter.
  • channel 9-as for instance arranging the inner wall thereof obliquely as illustratedand by disposing openings I0 and I3 at the points where the arc rupture always occurs, the oil is directed under the most favorable conditions and maximum arc extinguishing effect is realized.
  • this advantage is of especial significance.
  • the upper end of the contact rod 2 describes the arc of circle AB shown in Fig. 2; in the course of the :re-closure it describes the arc BC and during the second circuit interruption the arc CB.
  • Each of the angles AB and BC can be practically equal to 180.
  • the operation described can be improved by providing on the shaft l a rotating obturator I!! which, of the openings l and I3, only unmasks those which are in the vicinity of the arc.
  • the arc extinguishing fluid is a liquid
  • suitable elastic parts adapted to modify the moment of initiation as well as the intensity and duration of the arc extinguishing fluid ow.
  • a circuit breaker of the fluid blast type having a housing with two end walls, arc-blowing exhaust openings in the upper end wall and a plurality of fixed and movable contacts producing at least two arcs in series
  • means guiding the exhaust llow of said fluid from said housing through said openings comprising a relatively shallow groove-like channel in the underside of the upper end wall, opening towards the interior of said housing, said channel partially surrounding the path of a movable contact and said exhaust openings being located in said channel whereby an arc formed may be maintained freely in Said channel by the action of the fluid blast in lixed position along the path of said movable contact and in front of said arc-blowing exhaust openings.
  • a circuit breaker of the character described comprising a housing with two end walls containing an arc-extinguishing fluid and having a plurality of arc-blowing exhaust openings in the upper end wall for carrying a flow of said fluid, a pair of spaced fixed terminal contacts, a movable contact element engageable after a practically complete rotation with said fixed contacts, whereby the medium in which the circuit interruption and incident arc formation take place is always different from the medium in which the preceeding and succeeding circuit interruptions and arc formations take place, 4and means for guiding the exhaust flow from said housing towards said openings to maintain by said exhaust flow a non-confined arc along the path of its movable contact in front of said openings, said flow guiding means being formed by a relatively shallow groove-like circular channel located in the underside of the upper end wall7 opening towards the interior of said housing and partially surrounding the path of an end of said movable contact element, and said exhaust openings being located in said channel.
  • a circuit breaker of the character described comprising a housing with two end walls containing an insulating arc-extinguishing fluid and having in the upper end wall a plurality of exhaust arc-blowing openings for said fluid, a pair of spaced fixed terminal contacts, a movable contact element engageable with said fixed contacts, means guiding the flow of said fluid from said housing to said blowing openings for producing an efficient arc extinction in said openings, said last named means comprising a relatively shallow groove-like channel located in the underside of the upper end wall, opening towards the interior of said housing and having at its bottom said exhaust openings whereby an arc formed is immobilized by the action of the fluid flow along the path of the movable contact in front of said openings so that said arc is efficiently extinguished although non-coniined.
  • a circuit breaker of the character described comprising a housing with two end walls containing a dielectric arc extinguishing fluid and having a plurality of arc blowing exhaust openings to discharge said uid, a pair of spaced iixed terminal contacts, a movable contact element mounted to effect a full rotation and to cooperate with said fixed contacts whereby the space in which the arc is formed during an interruption is always different from the space in which the succeeding arc is formed, elastic pressure responsive elements positioned within the said housing to increase the duration of said arc blowing discharge flow and means for directing said discharge flow from said housing through said arc blowing openings and for maintaining freely lan arc formed in the path of its movable contact in front of said openings by the action of said directed flow, said last named means comprising an open and relatively shallow groove like channel in the underside of the upper end wall, partially surrounding the path of an end of the movable contact element and opening towards the interior of said housing, whereby the arcs although non-restrained are immobilized
  • a circuit breaker of the character described comprising a housing with two end walls containing a dielectric fluid and having a plurality of are blowing iiuid exhaust openings, a pair of spaced xed terminal contacts, a movable contact element rotating at a predetermined rate of speed and effecting a full rotation to engage with said iixed contacts whereby the space and the medium in which an arc is formed is always diiTerent from the space and the medium in which a succeeding arc is formed, and guiding means for directing said i'luid from said housing to said iarc blowing exhaust openings to maintain freely an arc in optimum position in the path of the movable contact in front of said openings by the action of the uid flow to produce an eilicient arc extinction, said last named means comprising an inwardly open relatively shallow kcircular channel iri the underside of the upper end wall, having the form of a recess with obliquely disposed walls partially surrounding the
  • a circuit breaker of the character described; comprising a substantially cylindrical housing having two end walls, the upper end wall being inset to provide a well thereabove, said housing and said well containing ia dielectric fluid, resilient pressure responsive means, said upper end wall having a plurality of arc blowing exhaust openings therein providing communication between said housing and well, a pair of spaced iixed double sided contacts mounted on said end walls, and a rotatable contact member having ends engageable successively with both sides of said iixed contacts, said upper wall having at its interior surface an inwardly open relatively shallow annular iluid guiding recess havingsaid exhaust openings located at the bottom thereof, the upper fixed contact oi' said fixed contacts being disposed in said recess and the path of movement of the upper end of said rotatable contact member being located in said recess, said fluid guiding recess maintaining freely the upper arc formed by dynamic action of the exhaust flow in the path of said rotatable contact in iront of said exhaust openings
  • a circuit breaker according to claim '1 wherein the inner walls of said recess are obliquely disposed to guide the arc extinguishing iiuid in optimal manner from the housing to the exhaust openings in order to immobilize the upper arc in optimum position with respect to the fluid flow.
  • an interrupting unit comprising an insulating housing with two end walls containing dielectric arc extinguishing fluid and having a, plurality of are extinguishing fluid discharge openings in the upper end wall thereof, two fixed contacts, a rotatable contact member engageable with saidrlxed contacts, fluid guiding means comprising in the underside of the upper 'end wall an inwardly open relatively shallow annular recess having said discharge openings therein and wherein one of said xed contacts is mounted, the path of movement of one end of said rotatable contact member also being located in said recess, said recess maintaining by the dynamic action of said fluid discharge iiowing from said housing to said openings the non-coniined upper arc in the said path oi the contact member in front of said openings and directing said iiuid in optimal manner, and a pressure responsive elastic element located inside of said housing and cooperating with said fluid guiding means for delaying and lengthening the action of said fluid discharge
  • a circuit breaker according to claim 10 wherein the elastic element disposed intermediate the ends ofthe housing is an air lled member.
  • a circuit breaker according to claim 10 wherein means are provided for selectively obturatin-g said exhaust openings.

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  • Circuit Breakers (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US675554A 1950-06-09 1946-06-10 Circuit breaker Expired - Lifetime US2507971A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR916847T 1950-06-09
FR864122X 1950-06-09

Publications (1)

Publication Number Publication Date
US2507971A true US2507971A (en) 1950-05-16

Family

ID=26225701

Family Applications (2)

Application Number Title Priority Date Filing Date
US675554A Expired - Lifetime US2507971A (en) 1950-06-09 1946-06-10 Circuit breaker
US229359A Expired - Lifetime US2644877A (en) 1950-06-09 1951-06-01 Rotary circuit breaker

Family Applications After (1)

Application Number Title Priority Date Filing Date
US229359A Expired - Lifetime US2644877A (en) 1950-06-09 1951-06-01 Rotary circuit breaker

Country Status (5)

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US (2) US2507971A (it)
BE (2) BE503343A (it)
DE (2) DE839218C (it)
FR (3) FR916847A (it)
GB (2) GB615749A (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644877A (en) * 1950-06-09 1953-07-07 Forges Ateliers Const Electr Rotary circuit breaker
US2908789A (en) * 1957-07-19 1959-10-13 Lange Emil Electric circuit breaker
US3947649A (en) * 1973-03-30 1976-03-30 Siemens Aktiengsellschaft Method and apparatus for arc quenching
US20190299459A1 (en) * 2018-03-30 2019-10-03 The Gillette Company Llc Shaving razor system including skin interconnect member

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1108749A (fr) * 1954-06-18 1956-01-17 Dispositif pour l'interruption d'arcs électriques de grandes puissances
DE1161340B (de) * 1959-09-29 1964-01-16 Siemens Ag Fluessigkeitsarmer elektrischer Leistungsschalter
US4125750A (en) * 1976-09-22 1978-11-14 Kuhlman Corporation High voltage electrical switch
US4560247A (en) * 1983-07-01 1985-12-24 Quartz Et Silice Large bandwidth optical fibers
BR8503644A (pt) * 1985-08-01 1985-10-15 Lorenzetti Inebrase Sa Ferramenta portatil para abertura sob carga de circuitos eletricos
US4651024A (en) * 1985-11-27 1987-03-17 General Electric Company Electromagnetically actuated high DC current switch

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US438118A (en) * 1890-10-07 Terminal switch or cut-out device for electric-lighting systems
US1537352A (en) * 1919-10-23 1925-05-12 Gen Electric Electrical apparatus
US1566091A (en) * 1922-06-05 1925-12-15 Gen Electric Electrical apparatus
US1899605A (en) * 1929-12-10 1933-02-28 Westinghouse Electric & Mfg Co Circuit interrupter
US2051196A (en) * 1934-08-13 1936-08-18 Barfoed Svend Oil circuit breaker
US2100753A (en) * 1935-12-24 1937-11-30 Westinghouse Electric & Mfg Co Circuit interrupter
FR833188A (fr) * 1937-06-04 1938-10-13 Forges Ateliers Const Electr Disjoncteur à coupure dans l'huile à refermeture instantanée
FR852550A (fr) * 1938-10-14 1940-02-26 Forges Ateliers Const Electr Disjoncteurs en série à fonctionnement alternatif pour refermeture ultra-rapide de circuits
US2239243A (en) * 1937-06-04 1941-04-22 Forges Et Atelieres De Const E Oil circuit breaker for ultra high speed reclosure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467788A (en) * 1944-07-20 1949-04-19 Westinghouse Electric Corp Circuit interrupter
US2452477A (en) * 1945-04-16 1948-10-26 Westinghouse Electric Corp Circuit interrupter
BE465350A (it) * 1950-06-09

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US438118A (en) * 1890-10-07 Terminal switch or cut-out device for electric-lighting systems
US1537352A (en) * 1919-10-23 1925-05-12 Gen Electric Electrical apparatus
US1566091A (en) * 1922-06-05 1925-12-15 Gen Electric Electrical apparatus
US1899605A (en) * 1929-12-10 1933-02-28 Westinghouse Electric & Mfg Co Circuit interrupter
US2051196A (en) * 1934-08-13 1936-08-18 Barfoed Svend Oil circuit breaker
US2100753A (en) * 1935-12-24 1937-11-30 Westinghouse Electric & Mfg Co Circuit interrupter
FR833188A (fr) * 1937-06-04 1938-10-13 Forges Ateliers Const Electr Disjoncteur à coupure dans l'huile à refermeture instantanée
US2239243A (en) * 1937-06-04 1941-04-22 Forges Et Atelieres De Const E Oil circuit breaker for ultra high speed reclosure
FR852550A (fr) * 1938-10-14 1940-02-26 Forges Ateliers Const Electr Disjoncteurs en série à fonctionnement alternatif pour refermeture ultra-rapide de circuits

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644877A (en) * 1950-06-09 1953-07-07 Forges Ateliers Const Electr Rotary circuit breaker
US2908789A (en) * 1957-07-19 1959-10-13 Lange Emil Electric circuit breaker
US3947649A (en) * 1973-03-30 1976-03-30 Siemens Aktiengsellschaft Method and apparatus for arc quenching
US20190299459A1 (en) * 2018-03-30 2019-10-03 The Gillette Company Llc Shaving razor system including skin interconnect member

Also Published As

Publication number Publication date
FR54495E (fr) 1950-05-02
FR60380E (fr) 1954-11-02
DE864122C (de) 1953-01-22
US2644877A (en) 1953-07-07
DE839218C (de) 1952-05-19
BE465350A (it)
GB615749A (en) 1949-01-11
FR916847A (fr) 1946-12-17
GB683116A (en) 1952-11-19
BE503343A (it)

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