US2160681A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2160681A
US2160681A US182484A US18248437A US2160681A US 2160681 A US2160681 A US 2160681A US 182484 A US182484 A US 182484A US 18248437 A US18248437 A US 18248437A US 2160681 A US2160681 A US 2160681A
Authority
US
United States
Prior art keywords
plates
arc
insulating material
wall members
plate
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
US182484A
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English (en)
Inventor
Sandin Jerome
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US182484A priority Critical patent/US2160681A/en
Priority to US182780A priority patent/US2236580A/en
Priority to FR848164D priority patent/FR848164A/fr
Priority to DE1938S0135235 priority patent/DE693538C/de
Application granted granted Critical
Publication of US2160681A publication Critical patent/US2160681A/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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in arc chamber
    • 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
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate

Definitions

  • compositions comprising 50% Portland cement and 50% asbestos fibre or 50% Portland cement, 15% barytes and 35% asbestos fibre may also be used.
  • Horn fibre is also a suitable material from which the wall members 50 may be constructed.
  • a porous refractory material comprising 30% tale, 2% feldspar and 68% clay is also suitable but less desirable than the cold molded materials since it is more brittle and less capable of withstanding shock.
  • a plurality of deionizing plates 52, 54 and 56 of conducting material Disposed between the wall members 50 are a plurality of deionizing plates 52, 54 and 56 of conducting material.
  • the opposed inner surfaces of the wall members 50 are provided with slots or channels as shown at 58 and 60 of Figs. 6 and '7 for receiving a portion of the side edges of the plates.
  • the uppermost slot in the wall members 50 has a somewhat greater width than the remaining slots so as to accommodate the side edges of both the plate 52 of conducting material and an additional plate 62 of insulating material.
  • the wall members 50 are held in clamping engagement with the entire assemblage of plates by means of rivets 64 passing transversely through the wall members so as. to unite plates and wall members in a unitary structure.
  • Each wall member 50 is provided with spaced indentations or recesses extending from the outer surface inwardly, as shown at-66, so as to provide an intermediate shoulder portion 66 which has a vertical bore Ill therethrough for receiving a mounting screw 12.
  • the mounting screw 12 is adapt-ed to be screwed into the base 20, thereby securely holding the arc extinguishing structure 48 as a unit in proper position with respect to the contacts 24 and 26. This method of mounting the arc extinguishing structure facilitates the removal and replacement thereof for purposes of inspection and repair of either the are extinguishing structure or the breaker contacts.
  • the are extinguishing plates 52, 54 and 56 have a V-shaped slot 'l3 formed in one end thereof, as shown in Figs. 3, 5, 6 and 7. As shown more clearly in Figs. 4 and 5, the arc extinguishing plates are more closely spaced at their slotted ends and are arranged with their slots in superimposed relation so as to form an aligned are receiving groove in which the moving contact 26 is adapted to be moved for establishing an arc. Inasmuch as the arc extinguishing plates converge towards the slotted ends, the plates 56 .are shorter than the plates 54 in order' to maintain suillcient spacing between the ends of the plates to prevent insulation failure.
  • the are extinguishing plates 52, 54 and 56 are preferably of magnetic material such as iron or other ferrous material so that when the arc is drawn between the contacts 24 and 26, the magnetic reaction set up by the plates 52, 54 and 56 will move the arc towards the apex of the slots and into the plates.
  • the initial movement of the arc is effected chiefly by the plates 52 and 54 inasmuch as these plates have the side edges along their V-shaped slot extending on opposite
  • the opposed surfaces of the side wall members 50 adjacent the slots in the arc extinguishing plates taper inwardly in the direction of arc movement so as to provide a convergent entrance passage for the arc.
  • the narrow constricted portion between the opposed wall members 50 extends a considerable distance along the are receiving slots and again widens in the direction of arc movement as clearly shown in Figs. 1, 3, 5, 6 and '7.
  • This tapering entrance portion serves to contract the are so as to facilitate entry thereof into the arc extinguishing plates 54 and 56.
  • the portions of the plates 54 on either side of the path of movement of the moving contact 26 are deeply embedded or recessed in the grooves 60, as shown in Fig. 6.
  • the uppermost plate 52 is not recessed within the tapering portions of the wall members 50 as more clearly shown in Fig. 7, since this plate member serves as the upper arc terminal during arc movement towards the end of the slots.
  • the short arcs between theplates 52, 54 and 56 may move beyond the ends thereof.
  • the barriers 14 have portions thereof extending between two adjacent deionizing plates so that in the event certain of the short arcs succeed in passing through the plates and tend to restrike as a single arc,'there will be a sudden lengthening of the arc at the barriers which causes the arc to be extinguished.
  • the barriers 14 also serve to cool the hot gases emanating from between the deionizing plates and in this respect assist in the suppression of the arc and flame caused by the hot gases.
  • the barriers I4 have a certain cooling effect upon the discharged gases from between the deionizing plates
  • I have found that in certain instances it may be desirable to provide further means for cooling the gas and arresting the flame produced during circuit interruption.
  • I have shown a modified structure of insulating material which combines a perforated baflle with the barriers previously described.
  • the barrier portions 16 have united integrally therewith a baflle plate 16 provided with openings therethrough.
  • the baflle plate 18 extends transversely between the wall members 50 in the direct path of the gas discharge from the spaces between the deionizing plates.
  • baflle means of insulating material are provided, as
  • Figs. 10, 11 and 12 show a further modification of combined barrier and baille plate arrangement for preventing the issuance of an are beyond the end of the arc extinguishing structure.
  • the arrangement shown in these figures is somewhat similar to that shown in Figs. 8 and 9 except that an additional barrier plate 82 is provided.
  • the baflle plate 82 is spaced from the bafile plate 18 by two transversely extending ribs 84 which ribs are adapted to seat in aligned grooves provided transversely of the baflle plate I8.
  • the ends of the ribs 84 extend beyond the sides of the plate 82 and are preferably embedded in suitable notches 86 provided in the side wall members 50.
  • the width of the plate 82 is also somewhat narrower than the distance between the side wall members 50 in order to provide escapement for the gas passing through the apertures 80 in the baffle plate 18.
  • This structure is believed to be somewhat more emcient than that shown in Figs. 8 and 9, in that it provides a circuitous path of greater length to be traversed by the escaping gas and consequently cools the gas to a greater degree, thereby insuring a complete arresting of flame.
  • An arc extinguishing device for circuit interrupters comprising means of insulating material defining two opposed surfaces of an arc passage, said means of insulating material having a plurality of spaced grooves disposed along said opposed surfaces, a plurality of plates of conducting material disposed transversely between said opposed surfaces and having their side edges supported within said grooves, each of said plates having an arc receiving slot in one end thereof, a plurality of said plates having a part of their slot defining portions completely recessed in said, means of insulating material to prevent an are established adjacent said recessed portions from striking thereto.
  • An arc extinguishing device for circuit interrupters comprising a pair of spaced wall members of' insulating material, said wall members having a portion of their opposed surfaces adjacent one end tapering towards each other to provide a converging arc receiving passage, a plurality of spaced metallic plates disposed between said wall members, said plates having a V-shaped slot in one end thereof and considerable portions thereof defining the sides of said slots completely embedded in said tapering portions of said wall members for preventing an arc from striking to said embedded portions.
  • An arc extinguishing device for circuit interrupters comprising a plurality of spaced plates of conducting material, said plates having a V-shaped slot in one end thereof to form an aligned are receiving groove a pair of unitary support members of insulating material disposed on opposite sides of said plates for defining the side walls of an arc passage in which an arc is adapted to play, the opposed surfaces of said support members adjacent the sides of said slots tapering inwardly to provide an entrance portion for said arc passage which gradually decreases in width in a direction toward the closed end of said groove and in which an arc is adapted to be established, and recesses along the tapered surfaces of said support members for receiving the edges of a plurality of said plates.
  • a pair of spaced support members of insulating material said support members having a plurality of spaced grooves along their opposed inner surfaces, a plurality of plates of magnetic material disposed between said support members with their side edges resting in said grooves, means for holding said support members in engagement with said plates, each of said plates having a V-shaped slot extending inwardly from one end thereof to form an aligned are receiving channel, a plurality of said plates having portions adjacent either side of their slots extending beyond the remaining plates, and means for establishing an arc between said support members in a direction substantially normal to said extended portions of said plates, said extended portions of said plates being of substantially less width than the depth of the grooves in said support members in which said portions are disposed to prevent said arc from striking to said extended portions when it is established and during its movement by the magnetic reaction set up by said plates toward the end of said are receiving channel.
  • An arc extinguishing device for circuit interrupters comprising a plurality of spaced metallic plates, each of said plates having an are receiving slot in one end thereof, a pair of wall members of insulating material between which said metallic plates are disposed, the inner opposed surfaces of said wall members being provided with a plurality of longitudinally extending grooves for receiving the side edges of said metallic plates,
  • each wall member having a pair of recesses extending inwardly from the outer surface thereof, said recesses in each wall member being elongated in a direction parallel to the outer surface thereof and disposed in spaced longitudinal alignment to provide an intermediate portion, said intermediate portion of each wall member having an opening therethrough in alignment with said recesses for the reception of securing means for mounting said device upon a suitable support.
  • a pairof spaced support members of insulating material a plurality of metallic plates disposed in spaced relation between said support members, each of said metallic plates having a slot therein for receiving an arc to be extinguished, means for moving an are into said plates to form a plurality of short serially related arcs therebetween, plate means of insulating material supported between said support members and having a portion thereof disposed between two adjacent metallic plates to prevent the short arcs from moving beyond the ends of said metallic plates and reuniting into a single arc, and means associated with said plate means to assist the latter in cooling the arc gases discharged from the spaces between the metallic plates.
  • a circuitinterrupter a plurality of plates of conducting material, said plates having an are receiving slot in one end thereof, a pair of support members of insulating material disposed on in the slots of said plates, means for moving said arc into said plates to form a plurality of short serially related arcs, a plurality of plates of insulating material disposed between said support members, each of said plates of insulating material having at least a portion thereof interposed between two adjacent plates of conducting material, said plates of insulating material preventing the reformation of said plurality of serially related arcs into a single arc across the ends of said plates of condutllng material, and means associated with said plates of insulating material disposed adjacent the ends of said.conducting plate to provide a circuitous path for the gas discharged from the spaces between said conducting plates for cooling said gas.
  • a stack of plates of ferrous material said stack of plates having an aligned are receiving slot in one end thereof, a

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
US182484A 1937-12-30 1937-12-30 Circuit interrupter Expired - Lifetime US2160681A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US182484A US2160681A (en) 1937-12-30 1937-12-30 Circuit interrupter
US182780A US2236580A (en) 1937-12-30 1937-12-31 Circuit interrupter
FR848164D FR848164A (fr) 1937-12-30 1938-12-29 Perfectionnements aux interrupteurs
DE1938S0135235 DE693538C (de) 1937-12-30 1938-12-31 Lichtbogenloeschvorrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US182484A US2160681A (en) 1937-12-30 1937-12-30 Circuit interrupter
US182780A US2236580A (en) 1937-12-30 1937-12-31 Circuit interrupter

Publications (1)

Publication Number Publication Date
US2160681A true US2160681A (en) 1939-05-30

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
US182484A Expired - Lifetime US2160681A (en) 1937-12-30 1937-12-30 Circuit interrupter
US182780A Expired - Lifetime US2236580A (en) 1937-12-30 1937-12-31 Circuit interrupter

Family Applications After (1)

Application Number Title Priority Date Filing Date
US182780A Expired - Lifetime US2236580A (en) 1937-12-30 1937-12-31 Circuit interrupter

Country Status (3)

Country Link
US (2) US2160681A (fr)
DE (1) DE693538C (fr)
FR (1) FR848164A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551822A (en) * 1947-12-30 1951-05-08 Westinghouse Electric Corp Circuit interrupter arc extinguisher
US2632827A (en) * 1948-01-27 1953-03-24 Metropolitan Device Corp Circuit controller
US2707218A (en) * 1951-05-31 1955-04-26 Westinghouse Electric Corp Air-break circuit interrupters
US2727111A (en) * 1951-11-01 1955-12-13 I T E Circuit Breaker Corp Arc chute design for circuit breakers
US2839641A (en) * 1954-09-30 1958-06-17 Ite Circuit Breaker Ltd Arc shield for circuit breaker arc quencher
US2980781A (en) * 1954-03-16 1961-04-18 Reyrolle A & Co Ltd High voltage electric circuit-breakers of the air-breakers type
US3071666A (en) * 1959-04-09 1963-01-01 Westinghouse Electric Corp Circuit interrupters
US3441699A (en) * 1968-05-27 1969-04-29 Erickson Electrical Equipment Arc control apparatus for load-break switches
FR2123188A1 (fr) * 1971-01-28 1972-09-08 Teco
EP0062350A1 (fr) * 1981-04-06 1982-10-13 Mitsubishi Denki Kabushiki Kaisha Appareillage de suppression d'arc pour disjoncteur
WO2009156701A1 (fr) * 2008-06-27 2009-12-30 Hager-Electro S.A.S. Cage d'extinction d'arc
US8803021B2 (en) 2010-04-16 2014-08-12 Abb Technology Ag Switch unit, method for assembling a switch unit, and circuit breaker for a medium voltage circuit

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975671C (de) * 1941-05-10 1962-04-26 Aeg Elektrischer Stromunterbrecher mit Lichtbogenloeschung durch ein selbsterzeugtes Loeschmittel
US2492726A (en) * 1946-05-23 1949-12-27 Gen Electric Electric switch
US2687462A (en) * 1950-02-16 1954-08-24 Westinghouse Electric Corp Circuit interrupter
NL169844B (nl) * 1951-05-25 Iwema Foerpacknings Ab Werktuig voor het aan elkaar vastlassen van thermoplastische foeliebladen.
US2816990A (en) * 1954-09-24 1957-12-17 Westinghouse Electric Corp Circuit breaker
US3005892A (en) * 1957-03-19 1961-10-24 Ite Circuit Breaker Ltd Arc chute design for circuit breakers
DE1238979B (de) * 1960-07-01 1967-04-20 Licentia Gmbh Lichtbogenloeschkammer fuer Schalter mit in Luft schaltenden Kontakten
US3440378A (en) * 1966-04-05 1969-04-22 Gen Electric Metal plate type of arc-extinguishing device
DE2923234C2 (de) * 1979-06-08 1987-03-12 Brown, Boveri & Cie Ag, 6800 Mannheim Für Niederspannungsschaltanlagen bestimmter Leistungsschalter oder Schutzschalter
EP2597663A1 (fr) 2011-11-28 2013-05-29 Eaton Industries (Netherlands) B.V. Absorbeur d'énergie à arc

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551822A (en) * 1947-12-30 1951-05-08 Westinghouse Electric Corp Circuit interrupter arc extinguisher
US2632827A (en) * 1948-01-27 1953-03-24 Metropolitan Device Corp Circuit controller
US2707218A (en) * 1951-05-31 1955-04-26 Westinghouse Electric Corp Air-break circuit interrupters
US2727111A (en) * 1951-11-01 1955-12-13 I T E Circuit Breaker Corp Arc chute design for circuit breakers
US2980781A (en) * 1954-03-16 1961-04-18 Reyrolle A & Co Ltd High voltage electric circuit-breakers of the air-breakers type
US2839641A (en) * 1954-09-30 1958-06-17 Ite Circuit Breaker Ltd Arc shield for circuit breaker arc quencher
US3071666A (en) * 1959-04-09 1963-01-01 Westinghouse Electric Corp Circuit interrupters
US3441699A (en) * 1968-05-27 1969-04-29 Erickson Electrical Equipment Arc control apparatus for load-break switches
FR2123188A1 (fr) * 1971-01-28 1972-09-08 Teco
EP0062350A1 (fr) * 1981-04-06 1982-10-13 Mitsubishi Denki Kabushiki Kaisha Appareillage de suppression d'arc pour disjoncteur
US4446347A (en) * 1981-04-06 1984-05-01 Mitsubishi Denki Kabushiki Kaisha Arc-suppressing apparatus for circuit breaker
WO2009156701A1 (fr) * 2008-06-27 2009-12-30 Hager-Electro S.A.S. Cage d'extinction d'arc
FR2933230A1 (fr) * 2008-06-27 2010-01-01 Hager Electro Sas Cage d'extinction d'arc
US8803021B2 (en) 2010-04-16 2014-08-12 Abb Technology Ag Switch unit, method for assembling a switch unit, and circuit breaker for a medium voltage circuit

Also Published As

Publication number Publication date
DE693538C (de) 1940-07-12
FR848164A (fr) 1939-10-24
US2236580A (en) 1941-04-01

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