US2871318A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2871318A
US2871318A US499970A US49997055A US2871318A US 2871318 A US2871318 A US 2871318A US 499970 A US499970 A US 499970A US 49997055 A US49997055 A US 49997055A US 2871318 A US2871318 A US 2871318A
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US
United States
Prior art keywords
arc
plate
insulating
slots
plate portion
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
US499970A
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English (en)
Inventor
Russell E Frink
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.)
CBS 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
Priority to BE546847D priority Critical patent/BE546847A/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US499970A priority patent/US2871318A/en
Priority to DEW18754A priority patent/DE1025967B/de
Priority to GB9823/56A priority patent/GB792359A/en
Priority to FR1154076D priority patent/FR1154076A/fr
Application granted granted Critical
Publication of US2871318A publication Critical patent/US2871318A/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

Definitions

  • This invention relates to circuit interrupters in general, and, more particularly, to arc-extinguishing structures therefor.
  • interrupters of the foregoing type display a volt-ampere characteristic such that for a given current value, there is a maximum voltage interrupting ability, which may be stated in volts per plate. If the number of plates is doubled, and proper field strength, venting, etc., maintained, the voltage interrupting ability at the same current is doubled. Conversely, if the current to be interrupted is increased, the maximum voltage interrupting capacity per plate is correspondingly decreased.
  • Another object of the invention is to provide an improved arc chute for a circuit interrupter, particularly one of the magnetic air-break type, comprising a plurality of spaced plate portions, which may be either separate rectangular plates disposed in suitable slots along the walls of the arc chute, or an interleaving fin construction, in which certain of the plate portions or interleaving fins are provided with a substantially centrally disposed spot portion, and one or more adjacently disposed plate portions or fin members may be provided with pairs of spaced slots.
  • Patented Jan. 27, 1959 tegrally formed with an arc-chute side wall member, and such plate portions are interleaved upon the assembly of the arc chute.
  • Still a further object of the invention is to provide an improved circuit interrupter of the spaced plate type, in which certain portions of the established arc may be moved into centrally disposed slots provided in one or more spaced plate portions, and adjacent axial lengths of the arc may be subdivided into parallel arc portions by the provision of other plate portions having spaced slots therein.
  • Figure 1 is a side elevational view, partially in vertical section, of an air-break type of circuit interrupter, embodying the invention and shown in the closed circuit position;
  • Fig. 2 is a vertical sectional view taken substantially along the line I1II of Fig. 1, looking in the direction of the arrows;
  • Figs. 3 and 4 are enlarged plan views of certain plate portions utilized in the assembly of the arc-chute structure
  • Fig. 5 is a fragmentary, enlarged, inverted sectional view taken substantially along the line VV of Fig. 2, illustrating the manner of arc extinction;
  • Fig. 6 is a graph of the volt-ampere characteristics of a typical circuit interrupter of the spaced slotted plate
  • the reference numeral 1 generally designates suitable contact structure which, when separated to the open circuit position, establishes an are which is moved upwardly into an arc chute, generally designated by the reference numeral 2, as a result of the transverse magnetic field set up by the blowout coil 3 and associated magnetic structure 4.
  • a rotatable contact arm 5 carries a conducting bridge 6 which, in the closed circuit position, as shown in Fig. l, interconnects stationary main contacts 7, 8.
  • a contact stud 9 carries the current from the stationary main contact 7, through an insulating bushing 10 to the external circuit.
  • the contact stud for the stationary main contact 8 is not shown, but it may be identical to the contact stud 9.
  • the electrical circuit comprises the contact stud 9, stationary main contact 7, conducting bridge 6, stationary main contact 8, to the contact stud therefor, not shown, to the external circuit.
  • the contact arm 5 is rotated in a clockwise direction about a pivot pin, not shown, but which is in electrical contact with the stationary main contact 8, to draw an are between the arcing contacts 11, 12 after the separation of conducting bridge 6 from the main contacts 7, 8.
  • blowout coil 3 When this occurs, the blowout coil 3 will be put into series circuit and the transverse magnetic field set up thereby between the field pole members 14 (Fig. 2) will move the established arc upwardly along the arc terminal members 18, 19 into the arc chute 2.
  • the electrical circuit now comprises contact stud 9, conductor 20, blowout coil 3, contact clip 15, are terminal member 18, the arc itself, are terminal member 19, flexible 3 shunt 28, contact arm 5 to the other contact stud, not shown.
  • the are chute 2 comprises an insulating rectangularlyshaped housing member 22 positioned adjacent to an insulating plate 21, the latter serving as a base for the blowout coil 3.
  • a plate 24 composed of. an insulating material.
  • Two insulating spacer strips 25 space a plate 26, composed of an insulating material, away from the plate 24.
  • the plate 26 may have a plurality of apertures 27 formed therein which facilitate the venting of are gases therethrough, particularly when high currents are to be interrupted.
  • Two more insulating spacer strips 25 space the plate 26 from a plurality of insulating plate portions, hereinafter more fully described, forming a unitary plate assembly 45. More specifically, the plate portions are of two different types, one type being designated by the reference numeral 16 and shown more fully in Fig. 3 of the drawings, whereas the other plate portions, designated by reference numeral 17, are more fully illustrated in i.
  • the insulating plate portion 16 has provided therein a pair of spaced slots 29, 30, which generally diverge outwardly in a direction toward the upper end of the plate portion.
  • the upper closed ends 31 of the spaced slots 29, 36 are positioned inwardly from the outer side edges 32 of the plate portion 16 by an amount d, the purpose for which will become more apparent hereinafter.
  • second, generally rectangularlyshaped plate portion 16 has a wedge-shaped intervening plate portion 54 disposed between slots 29, with the narrow end 54:: facing the contacts.
  • the first plate portion 17, shown more fully in Fig. 4 of the drawings, has a substantially centrally disposed slot 33 provided therein, the upper end of which is closed, as at 34.
  • this slot 33 extends along the center line 35 of the first plate 17.
  • the plate portions 16, 17 are alternated, that is, a first plate 17 is employed, which is followed by a second plate 16, then another first plate 17, to be followed by a second plate 16, etc.
  • the tie plate portion 36 provided integrally in plate 16, purely for mechanical strength only, is preferably alternated, that is, the first plate 16 ernployed has the tie 36 to the left, whereas the second plate 16 employed has the mechanical tie 36 disposed to the right, etc.
  • the tie-plate portion 36 bridges the narrow end 54:: of wedge-shaped plate portion 54 with a side portion 51 of the second type of plate portion 16.
  • asbestos rope spacers 37 are clearly shown in Figs.
  • the plates 16, 17 are composed of a refractory insulating material, such as a ZlICOII porcelain, which does not give off gas when contacting an arc.
  • a refractory insulating material such as a ZlICOII porcelain
  • some aspects of the invention are not limited to use of non-gas evolving materials for the plate portions 16, 17.
  • a second insulating plate 26 which is spaced by spacer strips 25 from the right-hand plate of the plate assembly 45.
  • Two additional spacer strips 25 space the right-hand plate 26 from a refractory plate, not shown,which is, in turn, separated from the right-hand end of the housing 22 by a plurality of strips of fish paper.
  • Bolts 33a secure the several strips 2'5, plate 26 and the housing 22 to the plate 21.
  • Bolts 34a secure the right-hand plate 26 and its spacer strips 25 and fish paper strips to the housing 22.
  • the plates 16, 17 and the spacer strips 37 are cemented together in a preliminary process to form a unitary plate assembly 45, which may be bodily placed into the rectangular housing 22.
  • Insulating holding strips 23 are secured by bolts 44 to the opposed inner sides of the housing 22 to prevent the unitary assembly of plates 16, 17 from being forced upwardly out of the housing 22 by the pressure of gas formed during the interrupting operation.
  • the tie plate section of the plate may perform another important function besides imparting mechanical strength to the plate 16.
  • the arc in being driven up into the stack of ceramic plates, will be forced into a serpentine path by the inner edge 30a of slot 30 (Fig. 3) and one edge of the slot 33 of plate 17 (Fig. 4)
  • a circuit interrupter including means for establishing an arc, an arc chute for receiving and effecting the extinction of the are including side walls, said are chute also including a plurality of spaced plate portions of insulating material extending transversely inwardly between said side walls and generally transversely to the movement of the are, a plurality of first insulating plate portions spaced at intervals along said are chute each having a substantially centrally disposed closed slot provided therein extending inwardly from one side edge of the first plate portion with the open side of the slot facing said arc-establishing means, a plurality of second, intervening, plate portions each having a pair of elongated, closed slots therein spaced inwardly from the side walls of the arc chute and wholly provided in the plate material, one of the pair of elongated closed slots in each of the second plate portions opening at the edge of the second plate portion facing the arc-establishing means and having a tie-plate portion separating it from the adjoining closed slot of the pair of slots so that the latter slot is closed on all sides
  • a circuit interrupter including means for establishing an arc, an arc chute for receiving and efiecting the extinction of the are including side walls, said are chute also including a plurality of spaced plate portions of insulating material extending transversely inwardly between said side Walls and generally transversely to the movement of the arc, a plurality of first insulating plate portions spaced at intervals along said are chute each having a substantially centrally disposed closed slot provided therein extending inwardly from one side edge of the first plate portion with the open side of the slot facing said arc-establishing means, a plurality of second, intervening, plate portions each having a pair of elongated closed slots therein spaced inwardly from the side walls of the arc chute and wholly provided in the plate material, the pair of elongated closed slots diverging away from each other in the direction of arc motion, one of the pair of elongated closed slots in each of the second plate portions opening at the edge of the second plate portion facing the arc-establishing means and having a tie
  • a magnetic, air-break circuit interrupter of contact means for establishing an arc a generally rectangularly-shaped arc chute for receiving and extinguishing said are including spaced side walls and end walls, a multiplicity of insulating spaced plate portions bridging said side walls and extending generally transversely to are movement, said insulating spaced plate portions being of two types, namely a first type and a second type, the first type of insulating plate portion having a generally centrally located, closed slot therein opening from the edge of the first type of plate portion facing said contact means, the second type of insulating plate portion including two spaced, closed slots, one of the closed slots in the second type of insulating plate portion opening from the edge of the plate portion facing said contact means and having an integral, tie-plate portion separating it from the adjoining slot of the pair so that the latter slot is completely closed on all sides, the first and second types of insulating plate portions being alternately interspersed, and the openings of the slots in the first type of insulating plate portions
  • a magnetic, air-break circuit interrupter of contact means for establishing an are, a generally rectangularly-shaped arc chute for receiving and extinguishing said are including spaced side walls and end walls, a multiplicity of insulating spaced plate portions bridging said side walls and extending generally transversely to are movement, said insulating spaced plate portions being of two types, namely a first type and a second type, the first type of insulating plate portion having a generally centrally located, closed slot therein opening from the edge of the first type of plate portion facing said contact means, said closed slot in the first type of insulating plate portion tapering in a more restrictedmanner in a direction toward the closed end thereof, the second type of insulating plate portion including two spaced closed slots, one of the closed slots in the second type of insulating plate portion opening from the edge of the plate portion facing said contact means and having an integral tie-plate portion separating it from the adjoining slot of the pair so that the latter slot is completely closed on all sides, the two spaced closed slots
  • a circuit interrupter of the magnetic air-break type including a movable contact separable from a relatively stationary contact to establish an arc, a generally rectangularly-shaped arc chute including a multiplicity of spaced generally rectangularly-shaped, insulating plate portions for extinguishing said are, said generally rectangularlyshaped, insulating plate portions being at least of two different configurations, a first type of generally rectangularly-shaped insulating plate portion having a centrally disposed slot opening at one end of the plate portion and tapering to a restricted closed end toward the opposite end of the plate portion in the direction of arc movement, a second type of generally rectangularly-shaped insulating plate portion having a pair of closedend slots extending generally lengthwise of the plate portion, said pair of slots having a wedgeshaped intervening plate portion therebetween with the narrow end of the wedgershapedplate portion facing the contacts, a tie-plate portion bridging the narrow; end of said wedge-shaped plate portion witha side of the second type of plate portion so thatone of the two closed-end slots opens at the end

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  • Arc-Extinguishing Devices That Are Switches (AREA)
US499970A 1955-04-07 1955-04-07 Circuit interrupter Expired - Lifetime US2871318A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE546847D BE546847A (de) 1955-04-07
US499970A US2871318A (en) 1955-04-07 1955-04-07 Circuit interrupter
DEW18754A DE1025967B (de) 1955-04-07 1956-03-29 Lichtbogenloeschkammer mit im Wege des Lichtbogens angeordneten Platten aus Isolierstoff
GB9823/56A GB792359A (en) 1955-04-07 1956-03-29 Improvements in or relating to air break electric circuit interrupters
FR1154076D FR1154076A (fr) 1955-04-07 1956-04-06 Interrupteur électrique à dispositif d'extinction d'arc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US499970A US2871318A (en) 1955-04-07 1955-04-07 Circuit interrupter

Publications (1)

Publication Number Publication Date
US2871318A true US2871318A (en) 1959-01-27

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ID=23987519

Family Applications (1)

Application Number Title Priority Date Filing Date
US499970A Expired - Lifetime US2871318A (en) 1955-04-07 1955-04-07 Circuit interrupter

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US (1) US2871318A (de)
BE (1) BE546847A (de)
DE (1) DE1025967B (de)
FR (1) FR1154076A (de)
GB (1) GB792359A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967220A (en) * 1958-11-18 1961-01-03 Westinghouse Electric Corp Circuit interrupters
US3014999A (en) * 1957-10-24 1961-12-26 Acec Multi-contact electrical switches
US3128359A (en) * 1960-01-06 1964-04-07 Westinghouse Electric Corp Circuit interrupters having arc extinguishing means
US3179920A (en) * 1963-08-14 1965-04-20 Mcginty Otto Wayne Fluid level indicator for radiator
EP3699941A1 (de) * 2019-02-21 2020-08-26 Eaton Intelligent Power Limited Schaltanlage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3421876A1 (de) * 1984-06-13 1985-12-19 Brown, Boveri & Cie Ag, 6800 Mannheim Lichtbogenloescheinrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030582A (en) * 1933-03-13 1936-02-11 Ite Circuit Breaker Ltd Circuit controlling method and apparatus
US2644048A (en) * 1950-07-22 1953-06-30 Westinghouse Electric Corp Circuit interrupter
US2652469A (en) * 1950-09-20 1953-09-15 Allis Chalmers Mfg Co Arc chute with slotted and perforated barrier plates
US2655578A (en) * 1950-10-02 1953-10-13 Allis Chalmers Mfg Co Arc chute with notched barrier plates
US2740021A (en) * 1950-07-22 1956-03-27 Westinghouse Electric Corp Circuit interrupter
US6216006B1 (en) * 1997-10-31 2001-04-10 Motorola, Inc. Method for an admission control function for a wireless data network

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB666941A (en) * 1949-02-23 1952-02-20 Westinghouse Electric Int Co Improvements in or relating to air break electric circuit interrupters
DE935829C (de) * 1954-07-21 1955-12-01 Theodor Wuppermann G M B H Zugschere fuer landwirtschaftliche Fahrzeuge, insbesondere Ackerwagen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030582A (en) * 1933-03-13 1936-02-11 Ite Circuit Breaker Ltd Circuit controlling method and apparatus
US2644048A (en) * 1950-07-22 1953-06-30 Westinghouse Electric Corp Circuit interrupter
US2740021A (en) * 1950-07-22 1956-03-27 Westinghouse Electric Corp Circuit interrupter
US2652469A (en) * 1950-09-20 1953-09-15 Allis Chalmers Mfg Co Arc chute with slotted and perforated barrier plates
US2655578A (en) * 1950-10-02 1953-10-13 Allis Chalmers Mfg Co Arc chute with notched barrier plates
US6216006B1 (en) * 1997-10-31 2001-04-10 Motorola, Inc. Method for an admission control function for a wireless data network

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014999A (en) * 1957-10-24 1961-12-26 Acec Multi-contact electrical switches
US2967220A (en) * 1958-11-18 1961-01-03 Westinghouse Electric Corp Circuit interrupters
US3128359A (en) * 1960-01-06 1964-04-07 Westinghouse Electric Corp Circuit interrupters having arc extinguishing means
US3179920A (en) * 1963-08-14 1965-04-20 Mcginty Otto Wayne Fluid level indicator for radiator
EP3699941A1 (de) * 2019-02-21 2020-08-26 Eaton Intelligent Power Limited Schaltanlage
CN111599658A (zh) * 2019-02-21 2020-08-28 伊顿智能动力有限公司 开关设备

Also Published As

Publication number Publication date
GB792359A (en) 1958-03-26
BE546847A (de)
DE1025967B (de) 1958-03-13
FR1154076A (fr) 1958-04-02

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