US1834856A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
US1834856A
US1834856A US292729A US29272928A US1834856A US 1834856 A US1834856 A US 1834856A US 292729 A US292729 A US 292729A US 29272928 A US29272928 A US 29272928A US 1834856 A US1834856 A US 1834856A
Authority
US
United States
Prior art keywords
arc
grids
plates
conductor
circuit breaker
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
US292729A
Other languages
English (en)
Inventor
John E Mcgee
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 and Manufacturing 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 Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US292729A priority Critical patent/US1834856A/en
Priority to DES92586D priority patent/DE590941C/de
Priority to FR37682D priority patent/FR37682E/fr
Priority to GB21649/29A priority patent/GB315437A/en
Priority to DES94569D priority patent/DE578224C/de
Application granted granted Critical
Publication of US1834856A publication Critical patent/US1834856A/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
    • 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
    • H01H2009/365—Metal parts using U-shaped plates
    • 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
    • H01H2009/367—Metal parts defining a recurrent path, e.g. the subdivided arc is moved in a closed path between each pair of splitter plates

Definitions

  • a further object of my invention is to provide a circuit breaker having the abovenoted characteristics wherein a simple and inexpensivemeans is provided for fixing the orbit of the are near the central zone of the grids.
  • Figure 1 is a side elevation of a circuit breaker embodying features of myinvention and showing the grid structure in section;
  • the circuitbreaker apparatus such as is disclosed in the above-noted co-pending application, comprises an insulating base 4, upon which is mounted a stationary contact member 5 and i i to a movable switch arm 7, pivotally mounted upon a bracket 8, that is secured to the insulating base l.
  • the arc-extinguishing device comprises a plurality of sheet-iron grids 17, of U-shape, that are secured in assembled spaced rela tion by means of bolts 18 and a. bolt 19, that are surrounded by insulating bushings 21 and 22, respectively, and which are insulated from the grids.
  • the grids 17 are disposed bet-ween two spaced sheet-iron plates 23 and 24, and the grids 17 and plates 23 and 24. are separated from one another by insulating washers 25 surrounding the bushing 21, and insulating washers 26 surrounding the bushing 22.
  • the plate 23 is conductively connected to the contact member 5, and the plate, 24 is conductively connected to the switch arm 7 by means of a conductor 27.
  • the switch arm 7 is connected to a feed conductor terminal 28 mounted on the base 4 by means of a flexible conductor 29.
  • the grids 17. are provided with spiral slots 31 which radiate from the central opening 32 in the grids, as shown in Fig 2.
  • I have, therefore, provided the central bolt 19 of conductive material, and have connected it in the circuit through the circuit breaker, contacts 5 and 6 and the are subsequently drawn and moved into the grids, in such manner that the current flows through the central conductor bolt 19 in the same direction that current flows through the are drawn be tween the grids 17 and the end plates 23 and 24.
  • the bolt 19 extends through the base 4 and is provided with a feed-terminal member 33.
  • a conductor 34 connects the opposite end of the conductor bolt 19 to the contact member 5. The current flows, through the circuit breaker, when the contacts are in closed position, from the said terminal 33, through conductor bolt 19, conductor 34%, contact members 5 and 6, circuit-breaker arm 7 and flexible conductor 29, to the feed-conductor terminal 28.
  • the arc is moved between the grids and the plates 23 and 24, the current flows from the plate 23, through the arc to the right-hand grid 17, the bent end of the grid, an are between the right-hand grid and the central grid, the bent end of the central grid, an are connecting the central grid with the left-hand grid 17, an are between the outer grid and the plate 24:, the conductor 27 and flexible conductor 29, to the conductor terminal 2
  • the conductor bolt 19 Since the current passes through the conductor bolt 19 in the same direction that it passes through the arcs, the arc and the conductor bolt 19 being of the same polarity, at any instant, causes the are to be attracted toward the conductor bolt 19, which prevents the are from moving outwardly toward the edges of the grid as it revolves about the central portion of the grid.
  • the conductor bolt 19 also assists in the initial movement of the are into the grids.
  • any number of grids 17 may be used, depending upon the voltage of the circuit to be interrupted, it being the usual practice toprovide a grid for each 100 root mean square volts. It has been found that where approximately the above are voltage for each grid is not exceeded, the arc is extinguished and prevented from reforming within the first half cycle of an alternating current.
  • a circuit breaker comprising a pair of relatively movable contact members between which an arc is drawn, a stack of spaced metal (lo-ionizing plates into which the arc is moved, the plates serving as are terminals dividing the are into a plurality of seriesrelated sect-ions between which the arc moves, and a current conductor extending through the stack and so connected in series relation to the said contact members that the current flow therethrough is in the same direction as that through the said are sections for creating a magnetic field tending to attract the arcs toward the conductor.
  • a circuit breaker comprising a pair of relatively movable contact members between which an arc is drawn, a stack of spaced metal de-ionizing plates into which the arc is moved,
  • the plates serving as are terminals dividing the are into a plurality of series-related sections between which the arc moves, the said plates having means forcausing the arc to move in a circular orbit about a point interior of the stack and a-current conductor extending through the stack and so connected in series relation to theisai'd contact members that the current flow therethrough is in the same direction as that through the said are sections "for creating a magnetic field tending to attract the arcs toward the conductorr v 8.
  • a circuit breaker comprising a pair of relativelymovable contact members between which an arcisdrawn, a stack of spaced metal d'c-ion'izing plates disposed adjacent the contact members for receiving the are drawn therebetween and for sectionalizing the are into a plurality of series-related sections that are moved between the plates toward the interior of the stack, and a current conductor extending through the stack, and insulated from the plates thereof and connected in the circuit controlled by the contact members so that current flows through the arc sections and the said conductor inthe same direction.
  • the combination with a circuit breaker having separable are drawing contacts and a plurality of arc-quenching conductive plates which serve asarc terminals and between which an arc is sectionali'zed and caused to move, of means including a current conductor disposed parallel with the arcs'for creating a field near the center of the plates that exerts an attractive force upon the arcs and continuous open spaces between 11,
  • the combination with a circuit breaker having separable are drawing contacts and a pair of arc-quenching conductive plates which serve as are terminals and between which the are from the contacts is caused to move, of electromagnetic means near the center of the plates for influencing the arc to confine its orbit near the center of the plates and open spaces between said plates from a point adjacent said are drawing con tacts to the'opposite side of said plates.
  • a circuit breaker comprising a pair of relatively movable contact members between which an arc is drawn, a stack of metal deionizing plates having open spaces therebetween extending entirely through said stack a plurality of series-related sections between which the arc moves, means for causing the arc to move in a circular orbit about a point interior of the stack and a current conductor extending through the stack and so connected in series relation to the said contact members that the current flow therethrough is in the same direction as that through the said are sections for creating a magnetic field tending to attract the arcs to- Ward the conductor.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
US292729A 1928-07-14 1928-07-14 Circuit breaker Expired - Lifetime US1834856A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US292729A US1834856A (en) 1928-07-14 1928-07-14 Circuit breaker
DES92586D DE590941C (de) 1928-07-14 1929-07-05 Entionisierungseinrichtung zum Loeschen von Lichtboegen
FR37682D FR37682E (fr) 1928-07-14 1929-07-09 Perfectionnements aux interrupteurs de circuits
GB21649/29A GB315437A (en) 1928-07-14 1929-07-13 Improvements relating to arc-extinguishing devices for electric circuit interrupters
DES94569D DE578224C (de) 1928-07-14 1929-10-25 Entionisierungseinrichtung zum Loeschen eines zwischen zwei Elektroden gezogenen Wechselstromlichtbogens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US292729A US1834856A (en) 1928-07-14 1928-07-14 Circuit breaker

Publications (1)

Publication Number Publication Date
US1834856A true US1834856A (en) 1931-12-01

Family

ID=23125947

Family Applications (1)

Application Number Title Priority Date Filing Date
US292729A Expired - Lifetime US1834856A (en) 1928-07-14 1928-07-14 Circuit breaker

Country Status (4)

Country Link
US (1) US1834856A (de)
DE (2) DE590941C (de)
FR (1) FR37682E (de)
GB (1) GB315437A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632826A (en) * 1949-12-10 1953-03-24 Gen Electric Arc quenching circuit interrupter

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933574A (en) * 1954-04-26 1960-04-19 Westinghouse Electric Corp Circuit interrupters
DE1069736B (de) * 1957-07-19 1959-11-26
IT712788A (de) * 1963-08-21
DE1230882B (de) * 1964-01-16 1966-12-22 Licentia Gmbh Lichtbogenkammer
DE1261218B (de) * 1964-04-14 1968-02-15 Licentia Gmbh Leistungsschalter fuer Gleich- oder Wechselstrom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632826A (en) * 1949-12-10 1953-03-24 Gen Electric Arc quenching circuit interrupter

Also Published As

Publication number Publication date
DE590941C (de) 1934-01-13
GB315437A (en) 1930-08-21
FR37682E (fr) 1931-01-14
DE578224C (de) 1933-06-10

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