US2639354A - Electric circuit breaker - Google Patents

Electric circuit breaker Download PDF

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Publication number
US2639354A
US2639354A US189026A US18902650A US2639354A US 2639354 A US2639354 A US 2639354A US 189026 A US189026 A US 189026A US 18902650 A US18902650 A US 18902650A US 2639354 A US2639354 A US 2639354A
Authority
US
United States
Prior art keywords
contacts
arcing
arc
current
movable
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
US189026A
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English (en)
Inventor
Edward J Frank
Virgel E Phillips
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
Application filed by General Electric Co filed Critical General Electric Co
Priority to US189026A priority Critical patent/US2639354A/en
Priority to CH309308D priority patent/CH309308A/de
Priority to FR1043588D priority patent/FR1043588A/fr
Priority to DEI4701A priority patent/DE939460C/de
Priority to GB23389/51A priority patent/GB720021A/en
Application granted granted Critical
Publication of US2639354A publication Critical patent/US2639354A/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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • This invention relates to electric circuit breakers and more particularly to circuit breakers having main current-carrying contacts and arcing contacts arranged in parallel therewith across which the arc to be interrupted is drawn during a circuit opening operation, such, for example, as the circuit breaker disclosed in U. S. Patent 2,280,616, Baskerville, which is assigned to the same assignee of this application.
  • Circuit breakers of this type usually are provided with are blowout and quenching means such as an arc chute which is adapted to extinguish an are initiated across the arcing contacts only if the arc travels into the chute in a direction away from the main contacts.
  • an object of the invention is to provide a novel arrangement of blowout means and an associated arc runner for a circuit breaker having main current-carrying contacts and areing contacts, which arrangement is 'efiective to segregate the fixed arcing contacts from the fixed current-carrying contacts and which efiectively
  • a barrier in the form of an arc runner is disposed in the region intermediate the arcing and main contacts, which barrier is provided with an opening therein .through which the movable arcing contact is Thus the arc is drawn in a region movable.
  • Fig. 1 is a side view partially in section of a circuit breaker embodying the invention; and in which Fig. 2 is a view along the line 2-2 of Fig. 1.
  • the circuit breaker shown therein includes a terminal I comprising a conductor stud and a corresponding stud terminal 2 which are fixed in position with re,- spect to the circuit breaker frame (not shown).
  • the fixed contact structure generally designated at 3 is electrically connected with the terminal I while the movable contact arm 4 is pivoted and electrically contacted at 5 to terminal stud 2.
  • Contact arm 4 is rotatable about pivot 5 by the insulated operating rod 0 which is pivoted to the operating arm 4 at I.
  • Motivating force for the contacts is supplied through the actuatin member 8 and the coupling means of operating rod 6 is adjustable according to Patent No. 2,590,765, Frank et al., granted March 25, 1952, assigned to the assignee of this application.
  • Fixedly mounted on and movable with the contact operating arm 4 is a broad movable current-carrying contact 9 and a narrow movable arcing contact I0.
  • a conducting member I I to which is fastened the curved contact retaining member He: thereby to form a pocket for receiving therein the anchored ends of the main contact fingers.
  • Main currentcarrying fixed contact fingers I2 are biased for rotation in the clockwise direction about the pivot comprising the curved portion I3 of member II by means of compressional spring I4 whose associated guide pins i5 operate in the retainer member I la.
  • Fixed arcin contact I6 is mechanically and electrically connected to the member II by means of the shouldered conducting pin II riveted over at I8.
  • fixed arcing contact I-B comprises a pair of finger type contacts which are biased toward each other about pin I!
  • movable arcing contact Ill is provided with a considerable wiping movement in order to insure that these arcing contacts w ill n'ct be separated to draw the interrupting arc until after a safe separation of movable main contact 9 from the fixed main contact fingers I2 has been established. In this way the contacting surfaces of contacts .9 and H 2 do not become pitted and merely serve as current carrying contacts when the breaker isclose'd.
  • runner 2 in the form of a barrier or gas directing means provided according to the invention, and is inserted in the region between the fixed arc'ing contacts It and the hired current-carrying contact 'fingers 1%.. Insulation, such as Zia and 21b, is provided for electrically isolating the runner 2'] from the associated conducting parts so that runner 2! constitutes an effective shunt pa t-h independent of the contact structure.
  • a deflecting "barrier 23 is provided as a further feature according to the invention.
  • really constitutes a part turn coil in series with the blowout coil 25.
  • the effect of this blowout coil is to establish a magnetic condition which urges the arc in a direction toward the left end and As the contact In continues to move downwardly, the lower root of the are will transfer from the arcing contact II] to the arc runner 26 thereby introducing in series with the arc :and blowout coil 25 the lower blowout coil "2 to thus augment the blowout effect upon the arc toward the left. Because the coil 2%"!
  • the third blowout coil 30 is inserted in series with blowoutcoils 2:5 and 121 by reason of its being connected across the sin sulating block 3 which separates the :lowertrum ner "21 from the upper runner 129
  • the blowout eliieci; of these three coils u'pon'th'e arcwhereby' itlisdriven toextinction in the chute 2'4 will be "adequate to insure the interruption of all curr'ents the rating of the circuit breaker.
  • An electric circuit breaker comprising-a pair of relatively movable current-carrying contacts, a ,pair of relatively movable arcing contacts, are runner means disposed in the region .intermediate said-pairs of contacts, an opening insaid arc runner through which a movable vone of said arcing contacts ismovable, and means for urging the are drawn between said arcing contacts in a direction away from said current-carrying con- .tacts.
  • An electric circuit breaker comprising fixed and movable current carrying contacts, .fixed and movable arcing contacts arranged in parallel with said current-carrying contacts, stationary gas directing means partially surrounding said fixed arcing contact and havinga por tion thereof disposed intermediate saidifixed-current-carrying and said fixed arcing contacts and insulated therefrom for causing the arc gases produced :at said arcing contacts to move in .0218
  • vbaille means'di-sposed in the path of movement -of :said are gases when :said gases are moved in said one general direction, said 'ba'iiie means being effective to deflect :sai'd gases in another general direction away from said current-carrying contacts.
  • An electric circuit breaker comprising fixed and movable current-carrying contacts, fixed and movable arcing contacts arranged in parallel with said current-carrying contacts, gas directing means partially surrounding said fixed arcing contact and having a portion thereof disposed intermediate said fixed current-carrying and said fixed arcing contacts and insulated therefrom for causing the arc gases produced at said arcing contacts to move in one general direction, and baffle means movable with said movable arcing and current-carrying contacts and disposed in the path of movement of the arc gases when moved in said one general direction for deflecting said gases in another general direction away from said current-carrying contacts.
  • An electric circuit breaker comprising a pair of relatively movable current-carrying contacts, a pair of relatively movable arcing contacts, arc runner means disposed in the region intermediate said pairs of contacts, an opening in said arc runner through which a movable one of said arcing contacts is movable, means for urging the are drawn between said arcing contacts in a direction away from said current-carrying contacts, and gas-deflecting means disposed with respect to said arcing contacts so as to deflect the hot ionized gases caused by the are between said arcing contacts in a direction away from said current-carrying contacts.
  • An electric circuit breaker comprising a pair of relatively movable current-carrying contacts, a pair of relatively movable arcing contacts, barrier means including a portion of an arc runner disposed between one of said arcing contacts and one of said current-carrying contacts and partially surrounding said one arcing contact for directing the ionized gases formed upon separation of said arcing contacts in a predetermined direction, and gas-deflecting means disposed in the path of movement of said gases and arranged with respect to said barrier means so as to deflect effectively said gases in a direction away from said current-carrying contacts.
  • An electric circuit breaker comprising a pair of relatively movable current-carrying contacts, a pair of relatively movable arcing contacts, arc runner means disposed in the region intermediate said pairs of contacts, an opening in said arc runner through which a movable one of said arcing contacts is movable, means for urging the arc drawn between said arcing contacts in a direction away from said current-carrying contacts, and a gas-deflecting surface disposed on said movable arcing contact for deflecting the hot ionized gases caused by the are drawn between said arcing contacts issuing through said opening to be thereafter diverted in a direction away from said current-carrying contacts.
  • An electric circuit breaker comprising electrically interconnected fixed arcing and currentcarrying contacts, movable arcing and currentcarrying contacts movable into and out of engagement respectively with said fixed arcing and main contacts, an arc runner interposed between said fixed arcing and current-carrying contacts and insulated therefrom, said are runner being provided with an opening through which said movable arcing contact is movable, and magnetic blowout means interconnected between said fixed arcing and current-carrying contacts and said are runner for exerting a force on the are drawn between said arcing contacts in a direction away from said current carrying contacts.
  • An electric circuit breaker comprising electrically interconnected fixed arcing and currentcarrying contacts connected to one terminal of the breaker, movable arcing and current-carrying contacts connected to another terminal of the breaker and movable into and out of engagement respectively with said fixed arcing and ourrent-carrying contacts, said contacts and terminals being arranged in a loop circuit, an are runner interposed between said fixed arcing and current-carrying contacts and insulated there from, said are runner being provided with an opening through which said movable arcing contact is movable and being disposed with respect to said loop circuit so that the magnetic efiect thereof aids the arc in transferring from said fixed arcing contact to said arc runner, and magnetic blowout means interconnected between said fixed arcing and current-carrying contacts and said are runner for exerting a force on the are drawn between said arcing contacts causing the arc to move in a direction away from said ourrent-carrying contacts after transfer of the arc to said are runner.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
US189026A 1950-10-07 1950-10-07 Electric circuit breaker Expired - Lifetime US2639354A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US189026A US2639354A (en) 1950-10-07 1950-10-07 Electric circuit breaker
CH309308D CH309308A (de) 1950-10-07 1951-10-02 Elektrischer Schalter.
FR1043588D FR1043588A (fr) 1950-10-07 1951-10-03 Perfectionnements aux interrupteurs électriques
DEI4701A DE939460C (de) 1950-10-07 1951-10-07 Elektrischer Schalter
GB23389/51A GB720021A (en) 1950-10-07 1951-10-08 Improvements in and relating to electric circuit breakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US189026A US2639354A (en) 1950-10-07 1950-10-07 Electric circuit breaker

Publications (1)

Publication Number Publication Date
US2639354A true US2639354A (en) 1953-05-19

Family

ID=22695599

Family Applications (1)

Application Number Title Priority Date Filing Date
US189026A Expired - Lifetime US2639354A (en) 1950-10-07 1950-10-07 Electric circuit breaker

Country Status (5)

Country Link
US (1) US2639354A (fr)
CH (1) CH309308A (fr)
DE (1) DE939460C (fr)
FR (1) FR1043588A (fr)
GB (1) GB720021A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904659A (en) * 1957-04-09 1959-09-15 Allis Chalmers Mfg Co Circuit interrupter employing means for controlling metallic vapor emission
US2937257A (en) * 1957-04-18 1960-05-17 Mc Graw Edison Co Electric contacts
US3023292A (en) * 1958-10-01 1962-02-27 Gen Electric Electric circuit interrupter
EP0140173A1 (fr) * 1983-10-14 1985-05-08 Siemens Aktiengesellschaft Pièce de commutation pour appareillage de commutation électrique
EP0248342A2 (fr) * 1986-05-31 1987-12-09 Crabtree Electrical Industries Limited Disjoncteur et une méthode pour augmenter le pouvoir de coupure d'un disjoncteur
EP1065684A1 (fr) * 1999-07-01 2001-01-03 Schneider Electric Industries SA Appareillage électrique de coupure dont un organe de contact est muni d'un pare étincelle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1063695B (de) * 1957-09-20 1959-08-20 Licentia Gmbh Elektrischer, mehrpoliger, gekapselter Selbstschalter mit in Fukenkammern hineinragenden Kontakthebeln
FR2569304B1 (fr) * 1984-08-15 1990-12-28 Mitsubishi Electric Corp Interrupteur de circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1515143A (en) * 1919-08-05 1924-11-11 Westinghouse Electric & Mfg Co Control apparatus
US2335068A (en) * 1942-03-20 1943-11-23 Gen Electric Electric circuit breaker
US2347984A (en) * 1943-04-17 1944-05-02 Gen Electric Electric circuit breaker
US2480622A (en) * 1945-12-04 1949-08-30 Gen Electric Electric switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1515143A (en) * 1919-08-05 1924-11-11 Westinghouse Electric & Mfg Co Control apparatus
US2335068A (en) * 1942-03-20 1943-11-23 Gen Electric Electric circuit breaker
US2347984A (en) * 1943-04-17 1944-05-02 Gen Electric Electric circuit breaker
US2480622A (en) * 1945-12-04 1949-08-30 Gen Electric Electric switch

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904659A (en) * 1957-04-09 1959-09-15 Allis Chalmers Mfg Co Circuit interrupter employing means for controlling metallic vapor emission
US2937257A (en) * 1957-04-18 1960-05-17 Mc Graw Edison Co Electric contacts
US3023292A (en) * 1958-10-01 1962-02-27 Gen Electric Electric circuit interrupter
EP0140173A1 (fr) * 1983-10-14 1985-05-08 Siemens Aktiengesellschaft Pièce de commutation pour appareillage de commutation électrique
EP0248342A2 (fr) * 1986-05-31 1987-12-09 Crabtree Electrical Industries Limited Disjoncteur et une méthode pour augmenter le pouvoir de coupure d'un disjoncteur
EP0248342A3 (fr) * 1986-05-31 1988-11-23 Crabtree Electrical Industries Limited Disjoncteur et une méthode pour augmenter le pouvoir de coupure d'un disjoncteur
EP1065684A1 (fr) * 1999-07-01 2001-01-03 Schneider Electric Industries SA Appareillage électrique de coupure dont un organe de contact est muni d'un pare étincelle
FR2795858A1 (fr) * 1999-07-01 2001-01-05 Schneider Electric Ind Sa Appareillage electrique de coupure dont un organe de contact est muni d'un pare etincelle

Also Published As

Publication number Publication date
CH309308A (de) 1955-08-31
FR1043588A (fr) 1953-11-10
DE939460C (de) 1956-02-23
GB720021A (en) 1954-12-08

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