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US1872387A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
US1872387A
US1872387A US391734A US39173429A US1872387A US 1872387 A US1872387 A US 1872387A US 391734 A US391734 A US 391734A US 39173429 A US39173429 A US 39173429A US 1872387 A US1872387 A US 1872387A
Authority
US
United States
Prior art keywords
arc
plates
winding
contacts
arcs
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
US391734A
Other languages
English (en)
Inventor
Benjamin P Baker
Robert C Dickinson
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 US391734A priority Critical patent/US1872387A/en
Priority to FR702212D priority patent/FR702212A/fr
Priority to DE1930578227D priority patent/DE578227C/de
Priority to GB27074/30A priority patent/GB351335A/en
Application granted granted Critical
Publication of US1872387A publication Critical patent/US1872387A/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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • Our invention relates to circuit interrupters and particularly to circuit nterrupters of the air-break type which embody deionizing chambers and blow-out magnets.
  • One object of our invention is to provide a circuit interrupter having an arcing chamber of the above mentioned type with a blowout magnet which carries current only while the arc established upon the opening of the circuit interrupter is being extinguished.
  • Another object of our invention is to provide means for forcing the current through the circuit interrupter to energize the windings of -the aforesaid blow-out magnet.
  • a further object of our invention is to provide means or causing the arcs established in the deionizing chamber to move radially inward toward the centers of the plates cmposing the deionizing arrangement.
  • the arrangement usedl for inserting the blow-in winding in th circuit is advantageous over the use of separate transfer contracts or connecting the winding in the circuit, since the mechanical operating mechanism is simplified and the additional contacts are eliminated.
  • This structure is an improvement over placing the winding in the shunt circuit so that it is energized by the opening of the main contacts, since, with such a structure, there will be an arc at the main contacts when they are openeddue to the insertion of l" the winding in the circuit, unless intermediate auxiliary contacts. are provided on the main contacts.
  • the structure of our invention is also desirable in that the' only arc drawn is within the deionizing chamber s where it may be most effectively extinguished.
  • Figure l is a view, partly in section ,and partly in elevation, of a deionizing chamber embodying our invention.
  • Fig. 2 isa detail view in elevation, of one of the'metallic plates emp oyed in the arcdeionizing chamber disclosed in Fig. 1.
  • Fig. 3 1s a view in elevation of a pair of contacts of the general type shown 1n Fig. 1, but embodying a particular modification of our invention.
  • Fig. 4 is a view, similar to Fig. l, of another embodiment o our invention.
  • Fig. 5 is a view partly in section of an upper portion ofthe deionizing chamber shown in Figs. 1 and 4.
  • the circuit interrupter embodying our invention comprises, in general, an arc extinguishing chamber 1 which encloses separable contacts 2 and 3. Above the contacts 2 and 3 are positioned deionizing plates 4. The arc incldent to the opening of the contacts 2, 3 under load is moved upward into the spaces between the plates 4 and is rotated about a recurrent path therein until it is extinguished when the current passes through the zero value course of its alternating cycle.
  • Such a deionizing structure has been described and claimed in the co-pending application of J. Slepian, Serial No. 181,289, tiled April 6, 1927, and that of Benjamin P. Baker, Serial No. 187,987,1iled April 30,1927, and aigned to the Westinghouse Electric & Manufacturing Company, the assignee of the present application.
  • a series of deionizin metal plates 6 is provided below one of t e above-mentioned sets of arc horn plates 5, the plates 6 being insulated from eachotherand from the lates 5 and from the line conducting mem r 7 which supports the stationary contact member 2.
  • a winding 8 which surrounds the ath of the arc rovides a magnetic field for iorcing the arc rawn between contacts 2 and 3 into the deionizing plates 4. It will be evident upon examination that the winding 8 is normally not traversed by the current'ilowing through the contacts 2 and 3, but that it is ,energized immediately after the separation thereof.
  • the operation of the above-described ar- 4 rangement is as follows.
  • the arc which is drawn when the movable contact member 3 is separated from the stationary contact 2, impinges on an extension- 12 of the arc horn plates 5 and is immediately divided into two sections, as indicated by reference numerals 13 and 14.
  • the extension 12, or the arc horn plates 5, themselves, may, if desired, be made of a magnetic material.
  • the movable conf tact member 3 completes its movement away fromv the venting plates 5, the terminus of the arc is transferred from member 3 to the plates 5 and the portion 14 of the arc will thereulpon assume the position indicated at ,15 in 'g
  • the arc 13 has been transferred to the plates 6 and is thus in parallel with the winding 8.
  • the line current at once begins to flow t rough the winding 8.
  • the arc 13 andthe winding 8 are then in parallel and each must have the same -voltage drop thereacross. If the voltage drop in the winding is less.
  • Lamas? ferring current to the winding 8 is substantially the voltage drop across the series of arcs between lates 6. In order that this voltage drop all be suiciently great a plurality of plates are employed to make up the section 6. Noting that it is the magnetic field set up by winding 8 which forces the arc section 15 to move into the spaces between deionizing plates 4, it will be seen that the higher the transfer voltage, the quicker the aforesaid field will be set up and the sooner themain arc 15 will be driven into the deionizing chamber and extinguished.
  • the main arc 15 is forced into the slot or channel 16 formed as indicated in Fig. 2, in the lowerfend of plates 4.
  • the time ythe arc has reached the apex of the slot 16 in the plates 4, which is the time that the' eatest amount of driving force is requi the magnetic ield induced by winding 8 has been built up to a sufiicient strength to exert the required force on it.
  • a contact 34 is pivoted on'the venting plates 5 and is biased into contact engagement with the movable contact member 3.
  • FIG. 4 A structure similar to that just described in connection with' Fig. 1, is shown in Fig. 4, with the exception of the fact that a central portion of the series of deionizing plates 4 serves the same purpose as the separate series of plates 6 of Fig. 1. Considerable advantage is inherent in this structure, as will now be pointed out.
  • thecontacts 17 and 18 are both of the movable pe and are positioned adjacent a central section 19 of the deionizing plates.
  • the outer plates 21 and 22 of the section 19 extend almost to the movable contacts 17 and 18'and are bent backwardly upon themselves, thus formingeushaped members.
  • the plates 23, located tween the outer plates 21 and While the above-described arrangement' lll 22, are of greater length than the deionizing plates 4 and extend downwardly to a position adjacent the central ortion of the arc path.
  • Iron members 24 an 25 may, if desired, be positioned at the bottom of the ⁇ U-sha ed plates 21 and 22, to strengthen the fiel at that point in order to effect a quick transfer of the arc from contacts 17 and 18 to plates 21 and 22.
  • In circuit with the upper ends of the plates 21 and 22 are conductors 26 and 27 which overlap each other inthe middle of the deionizing structure.
  • the plates 21 and 22 are insulated from the deionizing plates 4.
  • the radial field is induced by a plurality of coils 33 Which are positioned at intervals among the plates 4.
  • Such an arrangement for inducing a radial field is described in the above-mentioned application y of Benjamin F. Baker.
  • Circuit-interrupting means comprising means for establishing an arc, an arc-extinguishing device associated therewith, a normally deenergized winding associated with the said device, means including a portion of said arc for inserting said winding in clrcuitwith another portion of said arc, and magnetic means for initially moving the l .arc until said winding is energized. rent flow 1n the w1nd1ng8.
  • Circuit-interrupting means comprising means for establishingan arc, an'arc-extinguishing device associated therewith, a winding formoving the arc and means for dividing the arc into a plurality of sections, one
  • Circuit-interrupting means comprising means for establishing an arc, an arc-extinguishing device associated therewith, means of magnetic material providing a magnetic circuit associated with said device, a winding for energizing said magnetic circuit and means for dividing the arc into a plurality7 of sections, one or more of which shuntsr said winding, means for rapidly moving that portion of said arc that shunts said winding and means for dividing the last said arc portion into a plurality of arcs.
  • a-conductor in series relation with sai arcs and associated with said magnetic field and said windings in such a manner so as to cause said arcs to traverse a path which is central in said field, said conductor having its ends connected to a spaced pair of said plates.
  • means for eX- tinguishing an arc comprising a plurality of spaced plates for splitting up the arc into a plurality of short arcs, a pair of separable contacts for drawing the arc outside of said lurality of plates in 4such a iio iis
  • a circuit interrupter,A means for drawing an arc, means for extinguishing said arc comprising a plurality of spaced metal plates, two of said plates having a portion which splits up the aro extending beyond the corresponding portion of other of said plates, and a conducting winding having its ends connected to said plates which have their extended portion.
  • means for extinguishing an arc comprising a plurality of conducting members for splitting the arc into a plurality of arcs, means for initially drawing the arc in a path spaced from said extinguishing means, means for moving said arc into said extinguishing means comprising a magnetizing coil having its ends connected to a pair of said conducting members extending beyond other of said members to a point near the path where the arc is initially drawn.
  • means for extinguishing an arc comprising a plurality ,r of spaced conducting plates for separating the arc into a series of short arcs, meansior initially drawing 'the are at a point spaced from said extinguishing means, means for setting up a magnetic field for moving said arc into said plurality of plates comprising a conducting loop having its ends connected to a pair of stationary arc terminal members extending to a point near the path where the arc is initially drawn.
  • means for drawing an arc means for extinguishing said arc comprising a plurality of spaced metal plates, two of said plates being of U-shape with the bottom of ythe U extending beyond the other of said plates at a oint near that portion of the arc which is rst drawn, and a magnetizing loop having its ends connected to one side of each of said U-shaped plates.
  • a circuit interrupter means for drawing an arc, means for splitting up said arc into a plurality of sections including arc terminal members on which the ends of said arc sections playmeans for later s litting 11p each of said arc sections into a p urali'ty of short arcs, and a magnetizing windn for moving the arc having its ends electrically connected to said arc terminal members.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
US391734A 1929-09-11 1929-09-11 Circuit breaker Expired - Lifetime US1872387A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US391734A US1872387A (en) 1929-09-11 1929-09-11 Circuit breaker
FR702212D FR702212A (fr) 1929-09-11 1930-09-03 Coupe-circuit désionisant
DE1930578227D DE578227C (de) 1929-09-11 1930-09-04 Entionisierungseinrichtung zum Loeschen von Wechselstromlichtboegen
GB27074/30A GB351335A (fr) 1929-09-11 1930-09-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US391734A US1872387A (en) 1929-09-11 1929-09-11 Circuit breaker

Publications (1)

Publication Number Publication Date
US1872387A true US1872387A (en) 1932-08-16

Family

ID=23547720

Family Applications (1)

Application Number Title Priority Date Filing Date
US391734A Expired - Lifetime US1872387A (en) 1929-09-11 1929-09-11 Circuit breaker

Country Status (4)

Country Link
US (1) US1872387A (fr)
DE (1) DE578227C (fr)
FR (1) FR702212A (fr)
GB (1) GB351335A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515596A (en) * 1946-10-16 1950-07-18 Electric Controller & Mfg Co Electric switch
US2590602A (en) * 1947-09-27 1952-03-25 Westinghouse Electric Corp Circuit interrupter
US2616007A (en) * 1947-01-04 1952-10-28 Westinghouse Electric Corp Circuit interrupter
US2625628A (en) * 1947-01-11 1953-01-13 Ite Circuit Breaker Ltd High-voltage circuit breaker
US2632075A (en) * 1947-01-04 1953-03-17 Westinghouse Electric Corp Circuit interrupter
US2692319A (en) * 1951-05-26 1954-10-19 Westinghouse Electric Corp Circuit interrupter
US2731530A (en) * 1947-01-11 1956-01-17 Ite Circuit Breaker Ltd High voltage circuit breakers
US2734970A (en) * 1951-09-28 1956-02-14 Circuit interrupters
US2761934A (en) * 1952-09-04 1956-09-04 Ite Circuit Breaker Ltd High voltage circuit breakers
US2795675A (en) * 1954-12-08 1957-06-11 Westinghouse Electric Corp Circuit interrupter
US2821606A (en) * 1953-09-23 1958-01-28 Westinghouse Electric Corp Circuit interrupter
EP3671787A1 (fr) 2018-12-19 2020-06-24 ABB Schweiz AG Système de commutation électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2112033A (en) * 1934-09-12 1938-03-22 Westinghouse Electric & Mfg Co Circuit interrupter

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515596A (en) * 1946-10-16 1950-07-18 Electric Controller & Mfg Co Electric switch
US2616007A (en) * 1947-01-04 1952-10-28 Westinghouse Electric Corp Circuit interrupter
US2632075A (en) * 1947-01-04 1953-03-17 Westinghouse Electric Corp Circuit interrupter
US2731530A (en) * 1947-01-11 1956-01-17 Ite Circuit Breaker Ltd High voltage circuit breakers
US2625628A (en) * 1947-01-11 1953-01-13 Ite Circuit Breaker Ltd High-voltage circuit breaker
US2646481A (en) * 1947-01-11 1953-07-21 Ite Circuit Breaker Ltd High-voltage circuit breaker
US2590602A (en) * 1947-09-27 1952-03-25 Westinghouse Electric Corp Circuit interrupter
US2692319A (en) * 1951-05-26 1954-10-19 Westinghouse Electric Corp Circuit interrupter
US2734970A (en) * 1951-09-28 1956-02-14 Circuit interrupters
US2761934A (en) * 1952-09-04 1956-09-04 Ite Circuit Breaker Ltd High voltage circuit breakers
US2821606A (en) * 1953-09-23 1958-01-28 Westinghouse Electric Corp Circuit interrupter
US2795675A (en) * 1954-12-08 1957-06-11 Westinghouse Electric Corp Circuit interrupter
EP3671787A1 (fr) 2018-12-19 2020-06-24 ABB Schweiz AG Système de commutation électrique
US11335524B2 (en) 2018-12-19 2022-05-17 Abb Schweiz Ag Electrical switching system

Also Published As

Publication number Publication date
GB351335A (fr) 1931-06-25
FR702212A (fr) 1931-04-02
DE578227C (de) 1933-06-10

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