US2372094A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

Info

Publication number
US2372094A
US2372094A US454514A US45451442A US2372094A US 2372094 A US2372094 A US 2372094A US 454514 A US454514 A US 454514A US 45451442 A US45451442 A US 45451442A US 2372094 A US2372094 A US 2372094A
Authority
US
United States
Prior art keywords
arc
slot
arcing
fiber
plates
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
US454514A
Other languages
English (en)
Inventor
Winthrop M Leeds
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 CA432280A priority Critical patent/CA432280A/fr
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US454514A priority patent/US2372094A/en
Application granted granted Critical
Publication of US2372094A publication Critical patent/US2372094A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • This invention relates to circuit interrupters in general, and, more particularly, to a method and structure for effecting the rapid extinction of alternating current arcs. More specifically the invention concerns alternating current circuit interrupters of the type wherein an alternating current arc is drawn in an elongated slot or passage and therein subjected to the deionizing action of gaseous or liquid particles.
  • the present invention is concerned with an arc extinguishing structure which establishes an alternating current are in an elongated passage and causes the lateral oscillation of said are by magnetic means.
  • the lateral oscillation of the arc may be caused by the use of a unidirectional magnetic field.
  • One or more permanent magnets may be employed suitably shaped and o disposed within the arc extinguishing structure in relation to the arc that the arc is constantly under the influence of a unidirectional magnetic fleld. It will be evident, therefore, that in an alternating current circuit interrupter utilizing one or more of such permaneni; magnets the arc stream will be forced laterally in one direction during one half cycle of the alternating current wave, and forced laterally in the opposite direction during a subsequent half cycle in the alternating current wave. Obviously a direct current magnet could be used in placeof the permanent magnets to create the unidirectional magnetic field.
  • the lateral oscillation of the arc stream may also be produced by opposing magnetic and gas blast forces, each acting in a constant direction but first one and then the other predominating in magnitude.
  • the magnetic force in this case may be produced by suitably shaped plates of magnetic material, such as iron, suitably disposed adjacent to the arc stream.
  • the lateral gas blast may be obtained by utilizing the gaseous products of decomposition generated by the arc itself and directed by suitably shaped insulating plates forming the walls of the arcing chamber.
  • my invention concerns an improved method of arc interruption comprising simultaneously establishing and lengthening an alternating current arc, providing for a lateral oscillation of said are, the oscillations being such that during the lateral movement of the arc in one direction a suitable arc extinguishing gas is generated by the arc, and during the subsequent lateral movement of the arc in the opposite direction the arc is located in the most favorable position for interruption by a turbulent blast from the gas formed during the previous lateral movement of the arc.
  • My invention is also concerned with an improved method of arc interruption which comprises simultaneously lengthening and oscillating the alternating current are in an arc extinguishing medium.
  • the main object of my invention is to provide an improved structure for the interruption of alternating current arcs.
  • It is also an object of my invention to draw an alternating current are in an elongated slot or passage, and to laterally oscillate said are with a frequency substantially equal to the frequency of the alternating current circuit being interrupted. Because of the consecutive alternate direction of the lateral arc motion favorable conditions are obtained for most efiectively bringing into play the extinguishing influence of gaseous or liquid particles.
  • Another object is to provide in either an airbreak or a liquid-break alternating current circuit interrupter one or more permanent magnets suitably shaped and so disposed in relation to the arc stream as to furnish a unidirectional magnetic field across said are stream.
  • Another object is to provide in either a liquidbreak or an air-break circuit interrupter a plurality of U-shaped permanent magnets, the magnets being disposed in pairs substantially surrounding the arcing slot with like poles lying adjacent one another to furnish a unidirectional magnetic field transversely of the arcing slot.
  • Gas is produced during the lateral motion of the arc in one direction, by the arc itself acting upon gas-evolving material or upon a suitable liquid, such as oil, and during the subsequent lateral movement of the arc stream the arc is located in the most favorable position for interruption by a blast of gas formed by the arc itseli during the previous lateral movement or the arc.
  • Another object is to provide a pair of interrupting structures of the narrow slot type closely positioned with respect to one another, so that arcs may be extinguished alternately in one of said structures and then in the other of said structures, in effect doubling the life of the interrupter over that of the separated individual structures.
  • Another object is to provide a pair of cooperatin: structures of the narrow slot type and to use in conjunction therewith a movable contact of such shape th'airthe are tube interrupted in the twin structure will be extinguished just about as many timesm one oi. said cooperating struetures a in the other, thus doubling the life of the combined interrupting structure.
  • Another object is to use in a twin structure 01' the toregoing type a movable contact with two conducting buttons fixed thereon, so that as one of said buttons is worn down when only one of the structures is used during an interrupting operation, upon a subsequent opening of the interrupter the arc will be drawn at the other conducting button to utilize the structure which was not previously used.
  • Another object is to use a twin structure similar to the foregoing of either the air-break or liquid-break type, in-whlch is provided one or more substantially U-shaped plates composed of a magnetic material surrounding the arcing slots of both structures, to bias the arc into one or the other of said structures depending upon the location of said are when initially drawn.
  • Figure 1 is a side elevational view, partially in section, of a liquid type circuit interrupter constructed in accordance with the principles of my invention and shown in the closed-circuit position;
  • Fig. 2 is an enlarged cross-sectional view of one of the grid structures shown in Fig. 1 and taken along the line II-lI of Fig. 1 looking in the di-* rection of the arrows at a time when the movable contact has separated from the stationary contact thus drawing an arc therebetween;
  • Fig. 3 is a fragmentary cross-sectional view of the grid structure shown in Fig. 2 taken along the line II[III of Fig. 2 and looking in the direction of the arrows;
  • Fig. 4 is a cross-sectional view of the top fiber plate shown in Fig. 2 taken on the line IVIV of Fig. 2 with the tie rods 29 omitted;
  • Fig. 5 is an enlarged plan View of one of the fiber plates used in the grid structure of Fig. 1;
  • Fig. 6 is a cross-sectional view of the fiber plate shown in Fig. 5 taken on the line VI-VI of Fig. 5;
  • Fig. 7 is an enlarged plan view of the top fiber plate used in the grid structure shown in Fig. 1;
  • Fig. 8 is a side elevational view of the top fiber plate shown in Fig. '7;
  • Fig. 9 is an enlarged plan view of the bottom fiber plate used in the grid structure of Fig. 1;
  • Fig. 10 is a side elevational view of the bottom fiber plate shown in Fig. 9;
  • Fig. 11 shows two curves of arc current and magnetic force acting thereon in the circuit interrupter shown in Fig. 1;
  • Fig. 12 is a side elevational view, partly in secaaraoaa v p tion of a circuit interrupter embodying a modificatlon or-my invention and shown in the closedcircuit position;
  • FIG. 13 is air-enlarged crossesectional view or- 5i one of the grid structures shown in Fig. 12 taken along the line XIII--X1l1lfbf 12 andlooking in thedirection of thearrow;..,
  • Fig. 4 is :airagmentary cross-sectional view of the grid structure shown in Fig. 13 taken along 10 the line XIV-XIV'of Fig. 13 and looking in the direction .of the arrows;
  • Figs. 22, 22A and 22B consist of three enlarged fragmentary views of the end of the movable contact shown in Fig. 12;
  • Fig. 23 shows two curves of arc current and the lateral magnetic force acting thereon as a function of time, these curves being illustrative of action taking place in the interrupter shown in Fig. 12;
  • Fig. 24 is an elevational view, in central longitudinal section, of a modified type grid embodying the principles of my invention.
  • Figs. 25 through show plan and side views 80 of fiber plates used in the grid shown in Fig. 24;
  • Fig. 31 is a cross-sectional view taken along the line )DKXI-XXXI of Fig. 24;
  • Figs; 32 and 33 show the configuration of the end of the movable contact used in the grid 35 shown in Fig.24.
  • the reference numeral I designates a tank structure containing a suitable arc extinguishing liquid 3, such as oil, in
  • the two grid structures 5 are supported from a cover 1 by means of the terminal bushings 9 and the stationary contact structures ll, I2 which may be of any conventional design.
  • the external terminals I3, I 5 are used to connect the circuit-interrupter into the circuit to be controlled.
  • the circuit interrupter is operated by means of the reciprocating longitudinal movement of an insulating lift rod 11, at the lower end of which is a conducting bridging member l9.
  • a conducting bridging member l9 At the ends of the conducting bridging member l9 are two movable contacts 2 I, 23 of blade-like configuration, which cooperate with two stationary contacts 25, 21 to open and to close the electrical circuit through the breaker.
  • the electrical circult therethrough consists of the external line terminal l3, the stationary contact structure II, the stationary contact 25, the movable contact 2
  • Each of the grid structures 5 comprises a plurality of fiber plates compressed together by suitable tie rods 29, and spaced a proper distance below the stationary contact structures ll, l2 by the spacing sleeves 3 I.
  • the top fiber plate 33 of each grid structure 5 is more clearly shown in Figs. 7 and 8.
  • the top fiber plate 33 contains apertures 35 for the reception of the tie-rods 29, and a central aperture 31 through which extends the stationary Fig. 21 is an enlarged plan View of one-of the contact 25, or 21 which may be resiliently mounted. The clearance is slight between the stationary contact 25 or 21 and the central aperture 31 in the top fiber plate 33, the purpose for which will appear more fully hereinafter.
  • the bottom fiber plate in each of the two grid structures is designated by the reference numeral 39, and is shown more clearly in Figs. 9 and 10.
  • the bottom fiber plate 39 has bored therein apertures 35 for the reception of the tierods 29, and is also provided with a rectangular central aperture 4
  • Figs. 5 and 6 Immediately below the top fiber plate 33 (see Fig. 3) are a plurality, in this instance six, fiber plates 43, more clearly shown in Figs. 5 and 6,
  • pocket plates These fiber plates 43 are designated pocket plates-because each of them is provided with a series of pockets 45. When the grid structure 5 is immersed in the liquid 3, the pockets 45 serve to retain adjacent the arc path a readily available quantity of liquid, such as oil, upon which the arc may react.
  • the pocket fiber plates 43 also are provided with apertures 35 to accommodate the tie-rods 29. It will be noticed that the pocket fiber plates 43 are also provided with a throat portion 41, which leads into a flared vent opening 49, as more clearly seen in Fig. 5.
  • Immediately below the top group of six pocket plates 43 is a fiber insert plate 5
  • the two U-shaped permanent magnets 53, 55 are inserted in the fiber insert plate 5
  • the restriction 59 serves to hold the higher current arcs during the peak of the alternating current wave, when their cross-sectional areas are large, outside of the restriction 59 in the widened portion of the slot 51. But near a current zero, when the cross-sectional area of the higher current arc is relatively small, then it will enter the restriction 59. The smaller current arcs with their smaller cross-sectional areas may, however, freely enter the restriction 59 even during the peak of the current wave.
  • the arcing slot 51 is vented to the left in the pocket plates 43.
  • the are 53 When the instantaneous current in the first half cycle of arcing decreases, the are 53 will begin to retreat toward the middle of the slot 51 where it was initially drawn, due to the force of the expanding gases produced by the are 53 when it was in the right hand end of the slot 51.
  • the instantaneous current reaches zero, that is, at the first current zero of the arcing period, there is a good opportunity for the extinction of the are 53, as the gas streams through the arc toward the left, cooling the arcing space, and carrying away ionized particles.
  • the instantaneous current during this half cycle will be in the opposite direction than the direction considered above during the first half cycle of arcing.
  • the direction of the instantaneous current will be such that theunidirectional magnetic field will force the are 53 to the left, as viewed in Fig. 2, towardthe narrow restriction 59 in the fiber insert plate 5
  • the are 63 will be retained within the arcing slot 51 because the slot 51 in the fiber insert plate 5
  • the are 53 is, consequently, held in the constricted space 59 in the fiber insert plates 5
  • the width of the throat 41 formed in the pocket fiber plates 43 is such that there is sufiicient space on both sides of the arc stream 53 to permit a relatively free passage of gas, oil particles, and oil out of the arcing slot 51 through the flared openings 49, on both sides of the are 63.
  • Cobalt steel permanent magnets may be designed which may be exposed to alternating currents of 5,000 to 10,000 amperes without being demagnetized. Therefore, there need be no danger that the unidirectional magnetic field produced by the U-shaped permanent magnets 53, 55 will be weakened by currents of magnitudes which the breaker was designed to interrupt.
  • the top of the grid structure 5 around the stationary contact be completely enclosed, and that the bottom of the stack also have an aperture only large enoughto just admit the moving contact 2 I.
  • the vertical flow of gas and oil is reduced to a minimum, and the lateral flow of the gas and oil is correspondingly increased, which lateral flow helps in the extinction of the are 63.
  • my invention may well be incorporated in an air-type circuit breaker which utilizes gas-evolving plates composed of horn fiber, boric acid or other gas-evolving material.
  • the lateral motion of the are 93 could be used to engage the arc 93 with the plates composed of gas-evolving material to produce the requisite amount of arc extinguishing fluid necessary for interruption of the are 93.
  • My invention is also applicable to breakers of the compressed fluid type.
  • a direct current magnet may be used to produce a unidirectional magnetic field across the arcing slot 9'8 instead of using the U-shaped permanent magnets 53, 95 as shown.
  • the latter arrangement is preferable inasmuch as it is simpler and free of circuit connections which would have to be insulated from the high voltage part of the interrupter.
  • Fig. 11 shows a cycle of the alternating current I through the are 63 as a function of the time.
  • the curve F represents the magnitude of the magnetic force acting laterally on the are 03.
  • the magnetic force is equal to a constant times the first power of the instantaneous current, and therefore holds up very well in the neighborhood of the current zero periods as shown in Fig. 11.
  • the reference numeral 61 designates a tank containing a suitable arc extinguishing liquid 69, in this instance oil, in which are submerged two grid structures, generally designated by the reference numerals II, I3.
  • a coverJ5 for the tank 61 supports two terminal reception of the tie-rods I03.
  • the cover contains a central aperture through which extends the insulating lift rod 81 carrying a conducting bridging member 89 at the ends of which are securely mounted the movable contacts 9I, 93.
  • the movable contacts 9I, 93 engage in the closed-circuit position of the breaker, as shown in Fig. 12, the stationary contacts 95, 91.
  • External line terminals 99, I0! are provided to connect the breaker in the circuit to be interrupted.
  • the electrical circuit through the breaker includes the line terminal 99, stationary contact structure 8
  • Each of the grid structures II, I3 comprises a plurality of fiber plates compressed together by tie rods I03.
  • the top fiber plate shown therein is called a fiber guard plate I05 and is more clearly shown in Figs. 17 and 18. It will be noticed that the fiber guard plate I05 isprovided with four circular apertures I 01 for the The fiber guard plate I05 also is provided with a slot, generally indicated by the reference numeral I09 which vents into a passage III. The passage III itself vents into a flared opening H9, the purpose for which will appear hereinafter.
  • the fiber insert plate II5 contains a C-shaped plate II'I composed of magnetic material, in this instance iron, the configuration of which is shown more clearly in Fig. 21.
  • the fiber insert plate II5 i formed for the insertion of the magnetic plate II'I therein, and therefore to distinguish it from the other plates forming the grid structure "II, it is herein designated as an insert plate.
  • the fiber insert. plate II5 contains circular apertures I01 for the reception of the tie rods I03.
  • the fiber insert plate H5 is formed with a slot I09 identical to the slot I09 provided in the top fiber guard plate I05 previously described.
  • the two fiber guard plates I05 protect the magnetic plate II! from the action of the are drawn in the grid structure II. Therefore, they are herein designated as guard plates.
  • the fiber pocket plates II9 contain circular aperture I91 for the reception of the tie rods I03. They also contain a plurality, in th instance four, pockets I2I, which as in the previous embodiment of my invention provide a readily available quantity of oil adjacent the arc path.
  • the fiber insert plate I I5 and the fiber pocket plates I I9 also contain a passage III which leads to a flared opening II3.
  • Fig. 22 shows the configuration of the end of the movable contact 9
  • a conducting support member I23 disposed at right angle to the movable contact 9
  • the rounded contact buttons I25, I21 engage in abutting relation the stationary contact 95, which may be a fiat plate of metal resiliently mounted.
  • the pockets I2I in the fiber pocket plate 9 retain a sufllcient quantity of readily available oil along the walls forming the arcing slot I29.
  • the stationary contacts 95, 91 may be in the form of fiat metallic plates resiliently mounted to withstand the shock of closing.
  • the magnetic force is a function of the second power of the instantaneous current through the arc I33, and therefore will drop considerably in magnitude near the end of the first half cycle of arcing (see Fig. 23) to readily permit the expansive force of the decomposed oil gases to carry the arc I33 back toward the center of the arcing slot I29 adjacent the pars sages I II in the fiber plates constituting the grid structure.
  • the are I33 has a relatively small cross-section, because of the low me anitude of instantaneous arcing current at this time, and the streaming of gas and oil particles past the centrally positioned are I 33 and out the vent passages I I I in the fiber plates creates a very favorable condition for extinction of the arc I39.
  • the arc I33 may do one of two things depending upon its position. If it is off-center and slightly to the right, looking at Fig, 21, it may be drawn back toward the closed end Ill of the arcing slot I 29 to repeat its former movement. The decomposed oil gases which were left in the right hand end I of the arcing slot I29 will have had some chance to mix with fresh oil retained in the pockets I 2
  • a blade-like moving contact I45 is used similar to the blade-like moving contact 2
  • the fiber guard plate I41 has no vent passages III as did the fiber guard plates I 0! Fig. 1'7.
  • the fiber insert plate I 48 also hasno vent passages III.
  • the fiber pocket plate I49 is composed of two identical halves I50, which when assembled on the tie-rods I03 provide two lateral vent passages III, as more clearly shown in Fig. 31.
  • the grouping of the fiber plates in the grid structure H may comprise a fiber pocket plate I 49 between two groups of plates, each group consisting of an insert plate I 48 positioned between two guard plates Ill.
  • the groupings may be repeated to the bottom of the grid structure II. It is advisable to minimize the longitudinal flow of gas and oil in this embodiment The position of the arc of my invention. Consequently the top and bottom fiber plates used in the grid structure II of Fig. 24 may provide only slight clearance between the movable contact I 45 and the stationary contact (not shown) and apertures provided in the top and bottom plates (not shown) similar to the fiber plates 33 and 39 shown respectively in Figs. 7 and 9 of the interrupter shown in Fig. 1.
  • gas-evolving fiber plates could be used in place of a liquid, and that features of my invention may be applied to compressed-fluid interrupters.
  • fluid is used herein and in the appended claims it is meant to include gases, liquids, vapors-and sprays.
  • a circuit interrupter for interrupting an alternating current circuit, means defining an arcing passage vented only along one side, means for establishing an are within said passage, and
  • a circuit interrupter means providing an arcing chamber vented only along one side and immersed in a liquid, relatively movable contacts for establishing and lengthening an are within said chamber, and means for simultaneously causing the lateral oscillation of said are within said chamber, with a frequency substantially the same as the circuit, the lateral motion of the arc in one direction generating gas which is used to facilitate the extinction of the arc.
  • a circuit interrupter for interrupting an alternating current circuit, means definin an arcing slot, the slot being vented only along one side, relatively movable contacts for establishing and lengthening an are within said slot, an arc extinguishing liquid disposed adjacent to said arc, and magnetic means for causing the lateral oscillation of said are with a frequency substantially the same as the frequency of said alternating current circuit.
  • an insulating structure comprising a plurality of insulating plates pressed together, said insulating structure bein immersed in an arc extinguishing liquid, said insulating plates defining an arcing slot, the slot being vented only along one side, means for establishing an are within said slot, magnetic means comprising one or more plates of magnetic mation of said are with a frequency substantiallythe same as the frequency of said alternating current circuit.
  • a circuit interrupter for interrupting an alternating current, means defining an arcing passage, the passage being vented only along one side, means for establishing an are within said passage, one or more permanent magnets disposed adjacent said passage for creating a unidirectional magnetic field across said passage to cause the lateral oscillation of said are.
  • a circuit interrupter for interrupting an alternating current, means providing an arcing said plates having aligned openings therein to provide an arcing slot, one or more C-shaped plates of magnetic material substantially surrounding said slot, means for establishing an are within said arcing slot comprising relatively movable contacts, at least one of said contacts having two upstanding contact portions to position said are initially off center within said arcing slot.
  • an insulating structure comprising a plurality of insulating plates
  • an insulating structure comprising a plurality of insulating plates compressed together, said insulating structure being immersed in an arc extinguishing liquid.
  • said insulating plates forming an arcing slot, means for establishing an are within said slot, one or more pairs of U-shaped permanent magnets, each pair substantially surrounding said slot and disposed with like poles adjacent one another for creating a uni directional magnetic field across said slot, said magnetic field causing the lateral oscillation of said are within said slot with a frequency substantially the same as the frequency of said alternating current.
  • an insulating structure comprising a'pluraiity of insulating plates, said insulating structure being immersed in an are extinguishing liquid, said insulating structure providin an arcing slot, means for establishing an are within said arcing slot, means for venting said arcing slot along one side thereof, said venting means providing a relatively restricted slot in which said are may be positioned during at least part of the interrupting process, one or more pairs of U-shaped permanent magnets disposed adjacent said arcing slot and having like poles facing one another to create a unidirectional magnetic field across said arcing slot, the arrangement being such that the alternating current are which is established within said arcin slot is oscillated laterally by said unidirectional magnetic field, said alternating current are generating arc extinguishing gas during one half cycle and being positioned in said relatively restricted slot during the subsequent half cycle to receive the flow of said are extinguishing gas.
  • insulating means defining an arcing slot, means for establishing an are within said slot, means comprising magnetic material substantially surrounding said arcing slot, said arcing slot being vented only intermediate the ends thereof.
  • a circuit interrupter means defining an arcing slot, means for establishing an are within said arcing slot, one or more members of C- shaped magnetic material substantially surrounding said slot to cause the lateral oscillation of said are, said arcing slot being vented only intermediate the ends thereof.
  • an insulating structure comprising a plurality of insulating plates
  • said insulating plates having aligned openings to form an arcing'slot, venting means ventin said slot intermediate the ends thereof, said insulating structure being immersed in an arc extinguishing liquid, a contact disposed at one end of said arcing slot, a cooperating movable contact movable through said venting means and away from said first-mentioned contact, said movable contact having two upstanding conducting portions to establish and lengthen an are within said slot, one or more C-shaped members of magnetic material substantially surrounding said arcing slot and having their open portions adjacent said venting means, said C-shaped members tending to cause the lateral oscillation of said are in a direction substantially perpendicular to the center line of said venting means, said-upstanding conducting portions functioningto position said arc initially ofi center in said slot.
  • an insulating structure defining a slot
  • means for establishing an arc in said slot one or more pairs of U-shaped members composed of magnetic material disposed adjacent to said arcing slot with the open ends of each pair facing one another, means providing oppo ed vent passages extending from the center of said slot to the region outside said insulating structure.
  • insulatin means for defining two or more substantially closed arc. ing slots having a common entrance portion, means for establishing an are within said entrance portion, and magnetic means for moving said are into any one of said arcing slots. 16.
  • means for establishing an arc means for establishing a unidirectional magnetic field for causing a lateral oscillation of the arc, gas producing substance with which the arc contacts during its lateral movement in one direction to produce gas, the produced gas facilitating the extinction of the arc during its lateral movement in the opposite direction.
  • means forming a, slot having a restricted portion means for establishing an are within the slot, means for providing a unidirectional magnetic field for causing a lateral oscillation of the are within the slot, gas producing substance with which the arc contacts during its lateral movement in one direction to produce gas, the are being forced into the restricted portion during its lateral movement in the opposite direction, the produced gas facilitating the extinction of the arc after the latter has been forced into the restricted portion.
  • alternating current circuit interrupter means forming a slot having a restricted portion, venting means disposed adjacent the restricted portion, means for establishing an are within the slot, means providing a unidirectional magnetic field for causin a lateral oscillation of the arc within the slot, gas producing substance with which the arc contacts during its lateral movement in one direction to produce gas, the arc being forced into the restricted portion during its lateral movement in the opposite direction, and the produced gas passing out of the slot through the venting means to facilitate the extinction of the arc after the latter has entered WINTHROP M. LEEDS.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US454514A 1942-08-12 1942-08-12 Circuit interrupter Expired - Lifetime US2372094A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA432280A CA432280A (fr) 1942-08-12 Rupteur du circuit
US454514A US2372094A (en) 1942-08-12 1942-08-12 Circuit interrupter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US454514A US2372094A (en) 1942-08-12 1942-08-12 Circuit interrupter

Publications (1)

Publication Number Publication Date
US2372094A true US2372094A (en) 1945-03-20

Family

ID=23804917

Family Applications (1)

Application Number Title Priority Date Filing Date
US454514A Expired - Lifetime US2372094A (en) 1942-08-12 1942-08-12 Circuit interrupter

Country Status (2)

Country Link
US (1) US2372094A (fr)
CA (1) CA432280A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677032A (en) * 1951-06-23 1954-04-27 Westinghouse Electric Corp Electric switch with permanentmagnet blowout fields

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677032A (en) * 1951-06-23 1954-04-27 Westinghouse Electric Corp Electric switch with permanentmagnet blowout fields

Also Published As

Publication number Publication date
CA432280A (fr) 1946-01-01

Similar Documents

Publication Publication Date Title
US2100753A (en) Circuit interrupter
US2243038A (en) Circuit interrupter
US2442199A (en) Circuit interrupter
US2356040A (en) Arc control device
US1927888A (en) Circuit breaker
US2584570A (en) Circuit interrupter
US2749410A (en) Arc chute with perforated barrier plates having staggered slots
US2249499A (en) Electric circuit interrupter
US3369095A (en) Arc-extinguishing chambers for alternating current utilizing permanent magnets
US2596865A (en) Arc chute utilizing staggered u-shaped conductive members
GB899177A (en) A high-voltage glass-blast circuit-breaker
US3381248A (en) Magnetic pressure liquid circuit breaker
US2180147A (en) Electric circuit interrupter
US2660647A (en) Circuit interrupter
US2875303A (en) Circuit interrupter
US2942086A (en) Chimney cooler for air circuit breakers
US2697154A (en) Circuit interrupter
US3538279A (en) Blowout magnet structure for air-break circuit interrupter
US2323642A (en) Circuit interrupter
US2632075A (en) Circuit interrupter
US1861128A (en) High-power circuit-breaker
US2112033A (en) Circuit interrupter
US3626127A (en) Arc-breaking and quenching unit for electric circuit breakers
US2947839A (en) Arc chute having cooling and deionizing elements arranged at the exhaust end
US2759073A (en) High voltage magnetic arc extinguishing means