US1966316A - Arc chute - Google Patents

Arc chute Download PDF

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Publication number
US1966316A
US1966316A US331469A US33146929A US1966316A US 1966316 A US1966316 A US 1966316A US 331469 A US331469 A US 331469A US 33146929 A US33146929 A US 33146929A US 1966316 A US1966316 A US 1966316A
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US
United States
Prior art keywords
arc
plates
members
arcs
magnetic
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
US331469A
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English (en)
Inventor
Slepian Joseph
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 US331469A priority Critical patent/US1966316A/en
Priority to DES92878D priority patent/DE565722C/de
Application granted granted Critical
Publication of US1966316A publication Critical patent/US1966316A/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

Definitions

  • My invention relates to circuit interrupters and My invention comprises, in general, an insu- Dartieuiariy to circuit interrupters of the air lating base 1, upon which is mounted a stationbreak type wherein Vthe arc incident to the separy contact member 2, a magnetic core 3 and aratien f the Contacts iS led into a Space OC- a bracket 4 that supports the movable elements 5 cupied by a plurality of metal plates or grids of the breaker 5.
  • the foregoing elements may 60 and is brokenup into a series of arcs that are be of any type well known in the art to be suitlapidly deionized and extinguished as they move able, their precise structure not being claimed between the grids. herein.
  • the magnetic core 3 has a winding 6 mounted l0 described, an arc, consequent upon the opening thereon that may be energized, through leads 7, 65 of the circuit, moves into an arc-extinguishing from any desired control circuit.
  • a movable means adapted to divide it into a plurality of contact member 5 is carried by a pivoted arm 8 short arcs between grids of such form that amaghaving an armature 9 to be attracted by the netic flux is induced by current flow in the grids magnetic core 3 vwhen the coil 6 is energized.
  • the arm 8 is supported upon a pivot 11 and has 70 grid surfaces.
  • a lateral extension 12 that is attached, by means The rapid movement of the arc within the exof a spring 13, to a stationary bracket 14.
  • tinguishingmeans prevents the burning and va- Line current is conducted to the extension 12 porizin'g of metal which occurs if arc terminals from a terminal bolt 15 through a flexible conmove slowly or stand still for any appreciable' ductor 16.
  • the contact member 2 is fastened to 75 time. the base 1 by volts 17, to one of which is attached I have found that, in circuit breakers of the the terminal piece of a conductor 18.
  • vaporized metal combines chemically terminal piece for a conductor 18a is attached to with the oxygen of the air for a considerable time the bolt 15. after the electric arc proper is extinguished; and
  • the mode of operation in moving the mecha- 80 that the ionized products of this combustion are nism just described to open-circuit position from a frequent cause of restriking or re-ignition of the closed position shown in Fig. 1 is as follows. the arc. By preventing the formation of such Assuming the contact member 5 and the memvapors, re-ignition of the arc is prevented. ber 2 to be in engagement, as shown n Fig. l,
  • the a circuit is completed, through the conductor S5 deionizing means comprises an aggregate of 18, bolt 1'7, contact member 2, contact member spaced plates of U-shape, the adjacent surfaces 5, arm 8, conductor 16 and bolt 15, to the other between the spaced plates being traversed by the conductor 18. termini of the short arcs into which the original When the coil 6 is (le-energized, the spring 13 arc is broken.
  • FIG. 4 is a fragmentary view, in side elevation, guished. 0f the assembly ShOWn in Fig. 2. It is clearly apparent to any one familiar with Figs. 5 and 6 are schematic diagrams used in the contactor art that any other suitable means explaining my invention. n for effecting engagement and separation of con- 1N tact members might be employed, and, therefore, I do not wish to limit the application of my invention to any particular contactor.
  • a plurality of U-shaped metal plates 19 of the form shown in detail in Figs. 2 and 3 is assembled to constitute the arc-quenching device 21, the lower ends of the U-shaped members 19 being posi-V tioned slightly above the contacts 2 and 5.
  • a supporting plate 22 is providedy with a lateral extension which may be attached to the terminal 2 by a bolt 23.
  • Insulating members 24 and 25 are employed to space the plates apart, the width of each space which has been found to be suitable for most purposes being one-sixteenth of an inch.
  • the ux is concentrated providing a strong field along this whole length of the short arc to move it rapidly without substantially bowing it out.
  • a high reluctance path for the ux is provided between the plates.
  • Another method of making the reluctance of the flux paths between the legs of the U less than the reluctance in the arc spaces between the plates by the use of iron is described below in connection with Fig. 3.
  • a suicient number 0f U-shaped plates should be assembled to provide one intervening gap for each 140 volts of the circuit to be interrupted.
  • an end plate 26 is spaced from the last U-shaped member by insulating members 24 and 25, the entire assembly being clamped together by the. bolts 27 having insulating sleeves 28.
  • insulating members 29 are provided between the legs of each U-shaped member 19, to maintain the legs in their parallel relation when the bolts 2'7 are tightened.
  • the insulating members 29 are of substantially the same length as the legs of the U-shaped members 19 and, when so provided, the'parallel legs of the members may be in closer proximity to each other than other'- wise, as the insulation therebetween reduces the possibility of arcing between the legs of the same member, thereby ensuring that the path of the current will follow the U-shaped portion of the member.
  • the sides of the assembly 21 are enclosed by insulating plates31 that extend below, and adjacent to, the sides of the movable contact 5 and the terminal 2, thereby conning the arc within the width of the arc-extinguishing device 21.
  • the plates 31 are provided with openings through which the lugs 33 and 34 on' the end plates 26 and 22, respectively, extend in order to retain the plates on the sides of the structure 21 as illustrated in Fig. 4.
  • a flexible conductor 32 may connect end plate 26 to the bolt 15 through conductor 16.
  • the plates 19 of the device 21 may be made of non-magnetic conducting material and, if so,
  • the desiredmagnetic eiect may simply and readily be obtained by forming the plates 19 from magnetic material.
  • the insulating members 29, heretofore referred to may be replaced by a magnetic member 30 that is covered with insulation 35 but is located between the legs in a position similar to that of the members 29 as shown in Fig. 3.
  • an additional arc-moving force such as a separate blowout magnet, need not be provided, although it will be understood that the provision of such blowout magnets as are known in the circuit-interrupter art is within the purview of my invention.
  • an arc deionizing and extinguishing device be made as shown in Fig. 6 consisting of a plurality of fiat plates..35 in spaced relation to each other, itis found that, under certain conditions, a portion only of the arcs, as at 36 and 37, are rapidly moved in the spaces intervening between the plates, the other arcs such as at 38 moving very slowly or even remaining stationary. This is probably caused by the magnetic effects resulting from the ow of the current from one plate through the 'arc and down through the adjacent plate to an adjoining arc.
  • the magnetic effect of current iiow that conducts from each arc to the adjacent one through the U-shaped portion of ,the member is to cause the arcs to take up similar positions in the different spaces since the current indicated by the arrows 43 flows upwardly to each arc 45, 46, and 47 and downwardly away from each arc, irrespective of the position of the arc between the plates 19 and its relation to the other arcs.
  • the magnetic elds set up by the currents flowing in the U-shaped portion of metal between successive yshort arcs produce a driving force upon these.
  • the said plates may, if desired, be of non-magnetic material, and they may have associated with them magnetic means for assisting in moving the arc.
  • the plates themselves may be constructed of magnetic material, thus strengthening the iield about the current ilowing therethrough.
  • the plates are preferably made of U-shape in order that the' spaces provided between adjacent members shall form similar current paths with the arc, and that all of the arcs shall be acted upon in "the same manner and with the same speed of movement.
  • the number of plates, the widths of the spaces and the lengths of the plates will all depend upon the circuit in which my interrupting device is to be employed. Under all conditions, such dimensions should be so chosen that the speed of the arc movement shall always be great enough to prevent the arc from burning the plates, under which condition, the arc will be deionized and extinguished within a half cycle of on the whole body of the short arc and drive it quickly upward so ⁇ that it does not burn the plates. -Due to the fast driving action of the field, it is not necessary to provide the usual blowout coil required with the widely spacedplates of the prior art.
  • closely spaced in the claims is meant such close spacing that the magnetic eld created by the current in the plates affects the whole body of the short arc.
  • means for causing an are, means for extinguishing said arc including a plurality of current conducting members yfolded upon themselves with the folds of each current conducting member spaced apart, and each of said folded current conducting members, being spaced from the adjacent current conducting members, and each of the folds of said currentconducting members having a flux path therearound of lower reluctance between the folds of each, member than between adjacent members.
  • circuit-interrupting device having separable contact members, of arc extinguishing means comprising a plurality of 1 plates arranged in substantially parallel order, the end members of said plates being connected to the circuit to be interrupted and the plates between said end members being electrically connected in pairs closelyspaced together, a member of magnetic material between the plates forming each of said pairs, and a member of insulating material on each side of said member of magnetic material insulating it from the plates adjacent thereto.
  • means for causing an arc means forl extinguishing said arc includ-1 ing a. plurality of plates of good conducting material positioned in spaced planes and electrically connected together in pairs at their edges adjacent said means for causing the arc, said electrically connected pairs having open spaces therebetween -in which the arc is split up into short arcs and providing continuous U-shaped conducting paths of good conducting material connecting the ends of said short arcs, and said U- shaped conducting paths having flux paths therearound of lower reluctance between the legs of the U than in the spaces between the plates in which the short arcs play.
  • means for causingl an arc means for extinguishing said arc including a plurality of plates of good conducting material positioned in spaced planes and electrically connected together in pairs at their edges adjacent said means for causing the arc, said electrically connected pairs having open spaces therebetween in which the are is split up into short arcs and providing continuous U-shaped conducting paths of good conducting material connecting the' ends of said short arcs, and a plate of magnetic material positioned betweenv the plates forming each of said electrically connected pairs, said magnetic plate being insulated from at least one of the two plates between which it is positioned.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
US331469A 1929-01-10 1929-01-10 Arc chute Expired - Lifetime US1966316A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US331469A US1966316A (en) 1929-01-10 1929-01-10 Arc chute
DES92878D DE565722C (de) 1929-01-10 1929-07-19 Entionisierungsvorrichtung zum Loeschen von Lichtboegen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US331469A US1966316A (en) 1929-01-10 1929-01-10 Arc chute

Publications (1)

Publication Number Publication Date
US1966316A true US1966316A (en) 1934-07-10

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ID=23294110

Family Applications (1)

Application Number Title Priority Date Filing Date
US331469A Expired - Lifetime US1966316A (en) 1929-01-10 1929-01-10 Arc chute

Country Status (2)

Country Link
US (1) US1966316A (de)
DE (1) DE565722C (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042710B (de) * 1955-12-19 1958-11-06 Bbc Brown Boveri & Cie Leistungsschalter mit magnetischer Blasung
US2934629A (en) * 1956-09-10 1960-04-26 Comp Generale Electricite Arc blowing chimneys for circuit breakers having a large breaking capacity
EP0117288A1 (de) * 1982-11-10 1984-09-05 Mitsubishi Denki Kabushiki Kaisha Schalter mit Anordnung zur Lichtbogenlöschung
EP0892415A2 (de) * 1997-07-14 1999-01-20 Eaton Corporation Elektrisches Stromschaltgerät mit Wirbellichtbogenlösung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042710B (de) * 1955-12-19 1958-11-06 Bbc Brown Boveri & Cie Leistungsschalter mit magnetischer Blasung
US2934629A (en) * 1956-09-10 1960-04-26 Comp Generale Electricite Arc blowing chimneys for circuit breakers having a large breaking capacity
EP0117288A1 (de) * 1982-11-10 1984-09-05 Mitsubishi Denki Kabushiki Kaisha Schalter mit Anordnung zur Lichtbogenlöschung
EP0892415A2 (de) * 1997-07-14 1999-01-20 Eaton Corporation Elektrisches Stromschaltgerät mit Wirbellichtbogenlösung
EP0892415A3 (de) * 1997-07-14 1999-08-18 Eaton Corporation Elektrisches Stromschaltgerät mit Wirbellichtbogenlösung

Also Published As

Publication number Publication date
DE565722C (de) 1932-12-03

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