US3171936A - Arc extinguishing structure with venting passage and deflector means - Google Patents

Arc extinguishing structure with venting passage and deflector means Download PDF

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Publication number
US3171936A
US3171936A US212833A US21283362A US3171936A US 3171936 A US3171936 A US 3171936A US 212833 A US212833 A US 212833A US 21283362 A US21283362 A US 21283362A US 3171936 A US3171936 A US 3171936A
Authority
US
United States
Prior art keywords
arc
plates
insulating
passage
enclosure
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
US212833A
Other languages
English (en)
Inventor
Charles L Jencks
Keith W Klein
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.)
General Electric Co
Original Assignee
General Electric Co
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 NL295859D priority Critical patent/NL295859A/xx
Priority to BE635433D priority patent/BE635433A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US212833A priority patent/US3171936A/en
Priority to GB27909/63A priority patent/GB995706A/en
Priority to DE6603938U priority patent/DE6603938U/de
Priority to DEG38213A priority patent/DE1225734B/de
Priority to FR942669A priority patent/FR1364473A/fr
Priority to DK355663AA priority patent/DK106623C/da
Application granted granted Critical
Publication of US3171936A publication Critical patent/US3171936A/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
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the present invention relates to electric circuit interrupters and particularly to electric circuit interrupters including means for interrupting relatively high or short circuit currents.
  • an electric circuit interrupter of t-he type including contacts operating in air to draw an electric are which, shall include means for causing movement of the are through are cool ing means to a venting openingin the interrupter enclosure and to direct the arc gases outwardly of the enclosure and also toprevent backward fiow of such gases toward the interior or mechanism chamber of the interrupter.
  • an electric circuit interrupter comprising an insulating enclosure and at least one pair of contacts operating inthe enclosure.
  • Arc extinguishing means is provided adjacent the contacts comprising a stack of spaced metallic plates supported between a pair of opposed insulating side plate members. The ends of the side plates are spaced away from the adjacent end wall of the circuit breaker, leaving a vertical channel adjacent the arc chute assembly.
  • An opening or vent is provided in the interrupter housing adjacent the top Wall thereof.
  • Means is provided for preventing the arc gases from blowing back into the mechanism chamber of the interrupter, including an arc deflector plate adjacent the upper end of the arc passage for guiding the arc gasses out the vent opening and preventing them from blowing back into the circuit breaker mechanism chamber.
  • Means is also provided for closing the bottom end of the arc vent passage comprising a bottom arc chute plate which is made extra thick and which projects beyond the main arc chute assembly to close off the vertical arc passage at the bottom thereof and also to provide a large heat-receiving body.
  • FIGURE 1 is a side elevation view of an electric circuit interrupter incorporating the invention
  • FIGURE 2 is a plan view of an arc extinguishing portion of the circuit interrupter of FIGURE 1;
  • FIGURE 3 is a perspective view of the arc extinguishing 3,i7i,3 Patented Mar. 2, 1965 ice assembly of the invention apart from the insulating hous ing of the circuit interrupter.
  • the invention is shown as. incorporated in an electric circuit interrupter including a generally rectangular insulating housing having a base 10' and a cover 11.
  • the circuit breaker illustratedv is a three. pole circuit breaker, that is, it is adapted to control electric current in three separate electrical paths, each of saidv paths comprising a pole portion of the circuit breaker.
  • the current path through the central one of said poles only will be described. It will be understood however that the invention is equally applicable to single, two. and three pole devices, the construction at the other poles being substantially identical.
  • An. incoming line terminal member 12. is provided, sup.- ported on thev base 10 by an insert 13, connected to a first elongated. terminal member or strapli by suitable means such as. by a screw 15.
  • The. terminal member 14 carries a. stationary contact 16 at its inner end, which is. adapted to be contacted by a movable contact 17 carried, by a second elongated-conductor in theform of Contact arm 18.
  • the contact arm 13 is pivotally supported by suitable means'such aSby pivot pin 1% on a main contact arm 20.
  • The, contact arm 29 is attachedv to a Contact cross-arm 21 by suitable. insulating means, not shown, which serves to gang together all the corresponding contact arms of the poles of the circuit breaker.
  • the contact arm 18 is connected by a suitable flexible connector 22 to a conductor 25, which in turn is conn cted to an input terminal 24 of a current responsive assembly or trip unit 25.
  • the trip unit 25 has an outgoing or. load terminal strap 26 which is connected, together with a load terminal 27, to an insert Ziiby suitable means, such. as by a screw 219.
  • All of the contact arms 18 are adapted. to be moved simultaneously between open and closed circuit positions by suitable operating mechanism, includingv an operating link 36 and a releasable member 31, releasably engaged by a latch portion 25A of the trip unit 25;
  • the operating mechanism is adapted to be, operated manually by means of a manually engageable handle member 32 project-ing through an, aperture in, the top wall of the cover 11.
  • the rip unit 25 contain current responsive means for releasably retaining the member 31 in latched condition as shown. Upon the occurrence of predetermined current conditions, the latched member 31 is released, causing automatic opening of the contacts.
  • the releasable member 31 adapted to be re-engaged with the trip unit 25 fol lowing tripping, by movement of the manually operable handle 32 to its 0 position, indicated in dotted lines.
  • cooling and extinguishing means comprising a pair of spaced insulating side plates 33 serving to support a plurality of stacked metallic arc plates 34.
  • the side plates 33 terminate a short distance from the corresponding end wall portion 35 of the insulating casing base lib, leaving a vertical channel 36 therebetween.
  • a generally channelshaped lining member 37 of insulating material is received within the channel 36 and protects the Wall 35 from the effects of hot arc gases.
  • a vent opening 38 is provided in the end Wall portion of the cover 11, and a metallic woven screen member 39 is placed in the opening 38.
  • a deflector plate 40 is provided of insulating material, supported at an angle between the side walls 33, adjacent the vent opening 33, at the top of the passage 3 36.
  • the passage 36 is closed off at the botto thereof by means of a specially formed are chute plate 34A, which extends endwise beyond the ends of the other are chute plates 34 and abuts against the insulating liner 3'7.
  • the bottom plate 34A is made of a thickness substantially double that of the other are chute plates. This provides extra heat absorbing action at this critical point.
  • an arc runner 34B is supported on the terminal strap 14 adjacent the contact 16.
  • a piece of insulation 34C overlies the terminal strap adjacent the are runner 34B.
  • the bottom are chute plate 34A is electrically isolated, and serves to shield the adjacent portions of the conductor strap 14 from direct impingement by the are.
  • the latch member 25A In operation, upon the occurrence of high short circuit current conditions, the latch member 25A is released by the trip unit 25, releasing the releasable member 31 and permitting the operating mechanism to move the movable contacts 17 toward open position at high speed. This draws a power are between the contacts 16 and 17, which is moved by magnetic action into the arc chute plates 34 and toward the vent passage 36.
  • the extended bottom are chute plate 34A prevents these gases from reentering the main circuit breaker mechanism chamber below the assembly are chute plates 34.
  • the deflector plate 40 likewise prevents re-entry of the ionized gases toward the mechanism chamber at the top of the passage 36, and directs them outwardly through the vent opening 38 through the metallic screen 39.
  • the extra mass of the bottom are chute plate 34A further provides heat absorbing ability and shields the conductive strap 14 from the effects of the are.
  • An electric circuit interrupter comprising:
  • said side plates and said are plates being spaced away from a corresponding end wall of said insulating enclosure to provide a vertically extending arc vent passage, having a top end and a bottom end,
  • said interrupter also including a generally channel-shaped insulating lining member within said are vent passage between the ends of said are chute plates and the adjacent end wall of said insulating enclosure to shield said end wall of said insulating enclosure from said are gases.
US212833A 1962-07-27 1962-07-27 Arc extinguishing structure with venting passage and deflector means Expired - Lifetime US3171936A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL295859D NL295859A (da) 1962-07-27
BE635433D BE635433A (da) 1962-07-27
US212833A US3171936A (en) 1962-07-27 1962-07-27 Arc extinguishing structure with venting passage and deflector means
GB27909/63A GB995706A (en) 1962-07-27 1963-07-15 Improvements in arc extinguishing structures
DE6603938U DE6603938U (de) 1962-07-27 1963-07-18 Elektrischer schalter
DEG38213A DE1225734B (de) 1962-07-27 1963-07-18 Elektrischer Schalter mit einer Lichtbogenloescheinrichtung
FR942669A FR1364473A (fr) 1962-07-27 1963-07-25 Disjoncteur électrique équipé d'un dispositif d'extinction d'arc
DK355663AA DK106623C (da) 1962-07-27 1963-07-25 Elektrisk afbryder.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US212833A US3171936A (en) 1962-07-27 1962-07-27 Arc extinguishing structure with venting passage and deflector means

Publications (1)

Publication Number Publication Date
US3171936A true US3171936A (en) 1965-03-02

Family

ID=22792601

Family Applications (1)

Application Number Title Priority Date Filing Date
US212833A Expired - Lifetime US3171936A (en) 1962-07-27 1962-07-27 Arc extinguishing structure with venting passage and deflector means

Country Status (7)

Country Link
US (1) US3171936A (da)
BE (1) BE635433A (da)
DE (2) DE1225734B (da)
DK (1) DK106623C (da)
FR (1) FR1364473A (da)
GB (1) GB995706A (da)
NL (1) NL295859A (da)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441699A (en) * 1968-05-27 1969-04-29 Erickson Electrical Equipment Arc control apparatus for load-break switches
US3784775A (en) * 1972-07-27 1974-01-08 Ite Imperial Corp Arc runner between stationary contacts
EP0201731A2 (en) * 1985-05-01 1986-11-20 Westinghouse Electric Corporation Circuit breaker with arc chamber vents
US4761626A (en) * 1984-12-26 1988-08-02 Hitachi, Ltd. Circuit breaker
EP1939904A2 (en) * 2006-12-29 2008-07-02 LS Industrial Systems Co., Ltd Air circuit breaker with ARC extinguishing apparatus
CN101562083A (zh) * 2008-04-15 2009-10-21 通用电气公司 用于断路器的电弧隔板组件
US20090266793A1 (en) * 2008-04-23 2009-10-29 Maloney James G Electrical switching appartatus, and arc chute and arc member therefor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910001537B1 (ko) * 1987-04-21 1991-03-15 미쓰비시전기 주식회사 회로차단기
DE102006060691A1 (de) * 2006-12-18 2008-06-19 Siemens Ag Lichtbogen-Löscheinrichtung sowie elektrischer Schalter mit einer Lichtbogen-Löscheinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524287A (en) * 1945-01-19 1950-10-03 Westinghouse Electric Corp Circuit interrupter
US2769066A (en) * 1953-02-02 1956-10-30 Westinghouse Electric Corp Circuit interrupters
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
US3071666A (en) * 1959-04-09 1963-01-01 Westinghouse Electric Corp Circuit interrupters

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1919438A (en) * 1929-08-20 1933-07-25 Westinghouse Electric & Mfg Co Plate for circuit breakers
DE293332C (da) * 1930-08-14
US2243038A (en) * 1938-07-01 1941-05-20 Westinghouse Electric & Mfg Co Circuit interrupter
BE483190A (da) * 1939-03-22
US2749410A (en) * 1952-08-12 1956-06-05 Allis Chalmers Mfg Co Arc chute with perforated barrier plates having staggered slots
DE1027280B (de) * 1953-02-27 1958-04-03 Allis Chalmers Mfg Co Stromunterbrecher mit einem Schacht zum Aufnehmen und Loeschen des Schaltlichtbogens
DE1021054B (de) * 1954-05-11 1957-12-19 Siemens Ag Schaltkammer fuer elektrische Schaltgeraete
DE1121160B (de) * 1954-12-30 1962-01-04 Siemens Ag Lichtbogenkammer mit Isolierstoffwaenden fuer Niederspannungsschaltgeraete
BE545609A (da) * 1955-08-29

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524287A (en) * 1945-01-19 1950-10-03 Westinghouse Electric Corp Circuit interrupter
US2769066A (en) * 1953-02-02 1956-10-30 Westinghouse Electric Corp Circuit interrupters
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
US3071666A (en) * 1959-04-09 1963-01-01 Westinghouse Electric Corp Circuit interrupters

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441699A (en) * 1968-05-27 1969-04-29 Erickson Electrical Equipment Arc control apparatus for load-break switches
US3784775A (en) * 1972-07-27 1974-01-08 Ite Imperial Corp Arc runner between stationary contacts
US4761626A (en) * 1984-12-26 1988-08-02 Hitachi, Ltd. Circuit breaker
EP0201731A2 (en) * 1985-05-01 1986-11-20 Westinghouse Electric Corporation Circuit breaker with arc chamber vents
US4639564A (en) * 1985-05-01 1987-01-27 Westinghouse Electric Corp. Circuit breaker with arc chamber vent
EP0201731A3 (en) * 1985-05-01 1989-05-31 Westinghouse Electric Corporation Circuit breaker with arc chamber vents
EP1939904A2 (en) * 2006-12-29 2008-07-02 LS Industrial Systems Co., Ltd Air circuit breaker with ARC extinguishing apparatus
EP1939904A3 (en) * 2006-12-29 2009-05-20 LS Industrial Systems Co., Ltd Air circuit breaker with ARC extinguishing apparatus
CN101562083A (zh) * 2008-04-15 2009-10-21 通用电气公司 用于断路器的电弧隔板组件
JP2009259824A (ja) * 2008-04-15 2009-11-05 General Electric Co <Ge> 回路遮断器用アークシュートアセンブリ
EP2110831A3 (en) * 2008-04-15 2012-08-29 General Electric Company Arc chute assembly for a circuit breaker
US20090266793A1 (en) * 2008-04-23 2009-10-29 Maloney James G Electrical switching appartatus, and arc chute and arc member therefor
US7812276B2 (en) * 2008-04-23 2010-10-12 Eaton Corporation Electrical switching apparatus, and arc chute and arc member therefor

Also Published As

Publication number Publication date
FR1364473A (fr) 1964-06-19
DK106623C (da) 1967-02-27
GB995706A (en) 1965-06-23
NL295859A (da)
BE635433A (da)
DE1225734B (de) 1966-09-29
DE6603938U (de) 1969-11-27

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