US2590543A - Spaced plate circuit interrupter - Google Patents

Spaced plate circuit interrupter Download PDF

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Publication number
US2590543A
US2590543A US759270A US75927047A US2590543A US 2590543 A US2590543 A US 2590543A US 759270 A US759270 A US 759270A US 75927047 A US75927047 A US 75927047A US 2590543 A US2590543 A US 2590543A
Authority
US
United States
Prior art keywords
plates
arc
circuit interrupter
interrupter
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
US759270A
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English (en)
Inventor
John A Kalaway
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 US759270A priority Critical patent/US2590543A/en
Priority to FR968714D priority patent/FR968714A/fr
Application granted granted Critical
Publication of US2590543A publication Critical patent/US2590543A/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
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • 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

Definitions

  • This invention relates to circuit interrupters, in general, and more particularly to arc extinguishing structures therefor.
  • a general object of my invention is to provide an improved circuit interrupter of the spaced metallic plate type in which the arc is more readily moved into engagement with the several plates and therebetween to more rapidly eifect its interruption.
  • a more specific object of my invention is to provide an improved circuit interrupter of the spaced magnetic plate type in which the venting means is so improved as to facilitate the entry of the are between the plates and to minimize the back pressure of gases formed by the arc.
  • Still a further object is to improve the venting arrangement of an arc extinguishing structure of the foregoing type by symmetrically providing venting passages in such a manner that the length of the arc travel upon the several plates is not impaired.
  • Figure l is a side elevational view, partially in section, of a S-pcle air break circuit interrupter embodying my invention and shown in the open circuit position;
  • Fig. 2 is a plan view of one of the slotted ma netic plates used in the extinguisher of Fig. 1;
  • Fig. 3 is a side elevational view of the plate shown in Fig. 2;
  • Fig. 4 is a plan view of the arc extinguishing structure of Figure 1, indicating the alignment of the notches provided in the several plates to provide venting passages along the rear of the extinguisher;
  • Fig. 5 is an exploded view of several of the spaced magnetic plates to more clearly show the alignment of the notches provided in the plate structure.
  • the reference numeral I generally designates a 3-pole air break type of circuit interrupter to interrupt the three phases of the protected circuit. All three poles of the breaker are simultaneously opened by the actuation of an operating handle 2 which projects through a slot 3 in the cover 4 of the circuit breaker I. The cover 4 is mounted upon the base 5 of the interrupter I.
  • a line terminal 6 is provided adacent one end of the breaker I.
  • the line terminal 6 is electrically connected by a suitable configured strap I to a stationary contact 8, which, in the closed circuit position of the interrupter makes electrical engagement with the movable contact I0 of the interrupter.
  • the movable contact I0 is fixedly secured to a rotatable movable contact arm I I actuated by any suitable fast operating mechanism generally designated by the reference numeral I2.
  • the mechanism I2 forms no part of my invention and may be of any desired conventional type. It sufiices to say the mechanism I2 actuated by operation of the handle 2 serves to simultaneously open the three poles of the interrupter I to break the three phases of the protected circuit.
  • a conducting shunt I3 which makes electrical connection to a strap conductor I4, the latter leading to the left-hand line terminal I5 of the interrupter.
  • a suitable trip mechanism may be interposed in the circuit to effect opening of the interrupter I in response to excessive current conditions in the protected circuit.
  • the base 5 and the cover 4 are preferably formed of a suitably molded material such as Bakelite or the like.
  • each plate I 1 is preferably formed of magnetic material, in this instance, soft sheet steel.
  • Each plate I! has a converging slot I8 extending inwardly from one side I9 of the plate. Lugs 20 are preferably integrally formed with the plate I!
  • is made of fiber sheet material and is provided with a plurality of slots 22 through which project the lugs 20 of the plates II. After the several plates I! have been suitably positioned with their lugs 29 extending through the slots 22 of the fiber wrapper 2
  • the arc runner 26 has a reverse bend at its left hand end, as indicated at 25, within which is positioned a plate 28 provided with a threaded aperture 27.
  • the are 9 which is initially established upon the separation of the movable contact It upwardly away from the stationary contact 8, is drawn magnetically toward the apex of the several slots it provided in the magnetic plates H, as indicated by the arrow 29 of Fig. 4.
  • the are 9 When the are 9 reaches the closed ends of the several slots I8, it is subdivided into a plurality of serially related arcs designated by the reference numeral 30 in Fig. 1.
  • ! continue to move toward the magnetic centers of-the plates I? as indicated by the arrow 3 in Fig. 4. r
  • the increased are voltage due to the drop across the various cathode and anode terminals and the cooling and neutralizing of the hot ionized arc gas by the steel plates H extinguishes the are.
  • the symmetrical venting arrangement provides an arc extinguishing structure 16 of minimum dimensions without impairing the desired high speed are movement between the plates H.
  • the two venting passages 33 provided upon alignment of the several notches 32 readily permit venting of the arc gases and direct them upwardly, as viewed Fig. 1, away from the separated contact structure to minimize the possibility of restriking.
  • the venting passages 33 prevent the are 9 from being blown back by the back-pressure of the gases formed and permitting it to restrike between the contacts 8, l0.
  • a circuit interrupter including means for establishing an are, an arc extinguishing means for extinguishing the are including a plurality of spaced conducting plates, each conducting plate having a single-ended slot extending inwardly from the front end of the plate and along the central axis thereof, an insulating enclosure substantially enclosing the rear ends of the plates, each plate having a.
  • the several notches aligning and cooperating with the insulating enclosure to define two continuousventing passages at the rear corners of the plates to minimize back pressure of the formed are gases and to prevent unbalanced gas pressure forces, and the portions of the insulating enclosure which bound on the two continuous passages being completely closed to confine the arc gases within said continuous venting passages.
  • Arc-extinguishing means for a circuit interrupter including a stack of spaced conducting magnetic plates, each magnetic plate having a single V-shaped slot extending inwardly from the front end thereo an insulating enclosure 7 substantially enclosing the rear portion of the sides-and rear ends of the plates, each plate having a pair of notches provided therein at the rear corners thereof, the several notches aligning and cooperating with the insulating enclosure to define two venting passages extending continuously through the stack of plates at the rear corners of the plates to minimize back pressure of the formed arc gases and to prevent unbalanced gas pressure forces, and the bounding portions of the insulating enclosure which bound on the two continuous passages being completely closed to confine the arc gases within said continuous venting passages.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
US759270A 1947-07-05 1947-07-05 Spaced plate circuit interrupter Expired - Lifetime US2590543A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US759270A US2590543A (en) 1947-07-05 1947-07-05 Spaced plate circuit interrupter
FR968714D FR968714A (fr) 1947-07-05 1948-07-03 Interrupteur de circuit à lames espacées

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US759270A US2590543A (en) 1947-07-05 1947-07-05 Spaced plate circuit interrupter

Publications (1)

Publication Number Publication Date
US2590543A true US2590543A (en) 1952-03-25

Family

ID=25055032

Family Applications (1)

Application Number Title Priority Date Filing Date
US759270A Expired - Lifetime US2590543A (en) 1947-07-05 1947-07-05 Spaced plate circuit interrupter

Country Status (2)

Country Link
US (1) US2590543A (fr)
FR (1) FR968714A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691711A (en) * 1951-03-08 1954-10-12 Westinghouse Electric Corp Arc-quenching device for electric contactors
US2753423A (en) * 1951-03-28 1956-07-03 Hairy Rene Eugene Arc suppressors for electric switchgear
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
DE1132629B (de) * 1957-11-23 1962-07-05 Wissenschaftlich Tech Buero Fu Anordnung von Loeschblechen in den Loeschkammern einer Abdeckhaube fuer Schuetze
US3218418A (en) * 1961-05-19 1965-11-16 Westinghouse Electric Corp Circuit breaker with arc-extinguishing means
US3243559A (en) * 1963-07-01 1966-03-29 Gen Electric Electric switch with novel arc cooling means
US3270170A (en) * 1960-12-07 1966-08-30 Licentia Gmbh Compact switch having a simple breaking contact and associated arc extinction means
EP0028012A1 (fr) * 1979-10-27 1981-05-06 Fuji Electric Co. Ltd. Disjoncteur basse tension
US4302643A (en) * 1979-10-29 1981-11-24 Square D Company Fusible switch
DE3229299A1 (de) * 1981-08-13 1983-03-17 Mitsubishi Denki K.K., Tokyo Elektromagnetische kontaktvorrichtung
DE3302884A1 (de) * 1982-01-28 1983-08-04 Mitsubishi Denki K.K., Tokyo Elektrischer leistungsschalter
US5539170A (en) * 1994-12-21 1996-07-23 Eaton Corporation Arc grid plate for electrical switching device
US6297465B1 (en) * 2000-05-25 2001-10-02 Eaton Corporation Two piece molded arc chute
US20070095794A1 (en) * 2005-10-28 2007-05-03 Eaton Corporation Arc plate with runner, and arc chute and electrical switching apparatus incorporating same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1868442A (en) * 1930-10-29 1932-07-19 Westinghouse Electric & Mfg Co Arc quencher for circuit breakers
US2030582A (en) * 1933-03-13 1936-02-11 Ite Circuit Breaker Ltd Circuit controlling method and apparatus
US2134565A (en) * 1936-10-09 1938-10-25 Westinghouse Electric & Mfg Co Circuit breaker
US2140360A (en) * 1933-10-31 1938-12-13 Westinghouse Electric & Mfg Co Circuit interrupter
US2244061A (en) * 1940-07-31 1941-06-03 Ite Circuit Breaker Ltd Arc quencher
US2416164A (en) * 1943-11-06 1947-02-18 Westinghouse Electric Corp Arc extinguishing structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1868442A (en) * 1930-10-29 1932-07-19 Westinghouse Electric & Mfg Co Arc quencher for circuit breakers
US2030582A (en) * 1933-03-13 1936-02-11 Ite Circuit Breaker Ltd Circuit controlling method and apparatus
US2140360A (en) * 1933-10-31 1938-12-13 Westinghouse Electric & Mfg Co Circuit interrupter
US2134565A (en) * 1936-10-09 1938-10-25 Westinghouse Electric & Mfg Co Circuit breaker
US2244061A (en) * 1940-07-31 1941-06-03 Ite Circuit Breaker Ltd Arc quencher
US2416164A (en) * 1943-11-06 1947-02-18 Westinghouse Electric Corp Arc extinguishing structure

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691711A (en) * 1951-03-08 1954-10-12 Westinghouse Electric Corp Arc-quenching device for electric contactors
US2753423A (en) * 1951-03-28 1956-07-03 Hairy Rene Eugene Arc suppressors for electric switchgear
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
DE1132629B (de) * 1957-11-23 1962-07-05 Wissenschaftlich Tech Buero Fu Anordnung von Loeschblechen in den Loeschkammern einer Abdeckhaube fuer Schuetze
US3270170A (en) * 1960-12-07 1966-08-30 Licentia Gmbh Compact switch having a simple breaking contact and associated arc extinction means
US3218418A (en) * 1961-05-19 1965-11-16 Westinghouse Electric Corp Circuit breaker with arc-extinguishing means
US3243559A (en) * 1963-07-01 1966-03-29 Gen Electric Electric switch with novel arc cooling means
EP0028012A1 (fr) * 1979-10-27 1981-05-06 Fuji Electric Co. Ltd. Disjoncteur basse tension
US4302643A (en) * 1979-10-29 1981-11-24 Square D Company Fusible switch
DE3229299A1 (de) * 1981-08-13 1983-03-17 Mitsubishi Denki K.K., Tokyo Elektromagnetische kontaktvorrichtung
DE3302884A1 (de) * 1982-01-28 1983-08-04 Mitsubishi Denki K.K., Tokyo Elektrischer leistungsschalter
US5539170A (en) * 1994-12-21 1996-07-23 Eaton Corporation Arc grid plate for electrical switching device
US6297465B1 (en) * 2000-05-25 2001-10-02 Eaton Corporation Two piece molded arc chute
US20070095794A1 (en) * 2005-10-28 2007-05-03 Eaton Corporation Arc plate with runner, and arc chute and electrical switching apparatus incorporating same

Also Published As

Publication number Publication date
FR968714A (fr) 1950-12-04

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