US2243038A - Circuit interrupter - Google Patents

Circuit interrupter Download PDF

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Publication number
US2243038A
US2243038A US216884A US21688438A US2243038A US 2243038 A US2243038 A US 2243038A US 216884 A US216884 A US 216884A US 21688438 A US21688438 A US 21688438A US 2243038 A US2243038 A US 2243038A
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United States
Prior art keywords
arc
plates
insulating material
slots
magnetic
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Expired - Lifetime
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US216884A
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English (en)
Inventor
Leon R Ludwig
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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Publication date
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Priority to US216884A priority Critical patent/US2243038A/en
Priority to NL61310D priority patent/NL61310C/xx
Priority to CH214484D priority patent/CH214484A/fr
Priority to FR857156D priority patent/FR857156A/fr
Priority to BE435201D priority patent/BE435201A/xx
Priority to GB19045/39A priority patent/GB530199A/en
Priority to DES137679D priority patent/DE735829C/de
Application granted granted Critical
Publication of US2243038A publication Critical patent/US2243038A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • This invention relates to circuit interrupters
  • a further object of my invention is to increase the interrupting capacity f circuit interi-unters of the aforesaid type.
  • Another object of my invention remdes in the provision of an arc-extinguishing device for air.
  • circuit breakers of high interrupting capacity which device is equally effective on alternating and direct-current circuits.
  • a more specific object ot my invention is the provision of an arc-extinguishing device -for an air circuit breaker of the aforesaid type in which improved arc extinction is obtained by the use of spaced slotted plates of insulating material.
  • Figure 1 shows the circuit interrupter of my invention in side elevation, a portion oi .the arcextinguishing structure being broken away to reveal tlie position of the arc drawing contacts with respect to the arc-extinguishing device;
  • Fig. 2 is an enlarged side elevation view partially in section of the arc-extinguishing device group of plates forming Dart of the arc-extlnguishing device shown in the previous figures;
  • Fig.6 isanendelevationviewotamodered form of plate structure which may be used in the -arc-extinguishing device of my invention;
  • Fig. 'I is a fragmentary sectional view of the plate structure shown Ain Fig. 6. 4taken' along .the line VII-V11 thereof: g
  • Fig. 8 is a fragmentary sectional view showing a plate structure for an arc-extinguishing device similar to that shown in Fig. '7 except that the plates of magnetic material have been omitted;
  • Fig. 9 is a plan view showing a further form of plate structure capable oi use in the arc-extinguisher of my invention.
  • Fig. 10 is a sectional view o1' the plate structure shown in Fig. 9 taken along the line X-X thereof
  • Fig. 1l is a sectional View of the plate structure shown in Fig. 10, taken along the line XI-XI thereof
  • Fig. l2 is an elevation view showing still another arrangement of plate structure capable of use in the arc-extinguisher of my invention.
  • Fig. 13 is a sectional view of the plate structure shown in Fig. 12, taken along the line XIII-m1 thereof.
  • One form of ard-extinguishing structure which has proven to be successful commercially comprises a lplurality of spaced metallic plates having, aligned arc receiving slots therein.
  • the arc to be extinguished is drawn within or at the entrance portion of the slots and is moved to the closed end of the slots, and nally into the metallic plates where it is caused to play as a series of short arcs between the plates.
  • the metal plates in this instance quickly deionize 'the arc stream and bring about arc extinction without the issuance of ame from the vent passages between the plates.
  • circuit interrupter Although this type of circuit interrupter has proven to be effective in interrupting circuits carrying as high as 32,000 amperes at 15,000 volts, great diiilculty is encountered in causing currents of substantia-ily greater magnitude to properly transfer to the metallic delonizing plates.
  • an arc-extinguishing structure employing a plurality of spaced plates of insulating non-gas forming material having aligned arc-receiving slots therein is far more eilective than the known arc-extinguishing structure employing metallic plates, and is capable o! materially extending the upper limit of current capable of being interrupted.
  • One embodiment of the interrupter which will be hereinafter described in detail, is capable oi producing complete circuit interruption oi v125.000 amper-es at 600 volts alternating current with only 1/2 cycle of arcing. When connected to a direct-current circuit the interrupter is capable of interrupting up to 80,000 ampere's or more at 750 volts.
  • the improved interrupting power of my arcextinguishing structure is based upon the magnetic blast theory and is explained as follows. If an arc is moved laterally in air by a suitable magnetic ileld against a non-gas-producing solid of such shape that no turbulent flow of gas is produced, the section of the are remains substantially unchanged and only a slight increase in pressure of the arc gas results. The arc voltage is increased somewhat due to the loss of ions and heat to the restricting walls of the solid. Now if slots or vent openings are placed along the restricting wall sothat the pressure is relieved, a strong blast of gas passes through the openings. The arc must, therefore, ionize fresh gas in considerable quantties'in order to maintain itself and the arc voltage is thereby greatly increased.
  • the eil'ect of the magnetic field is to move ions out of the arc stream.
  • the force exerted by the magnetic fleld on the ions is transmitted to the gas surrounding the arc in collisions between the ions and the neutral gas mole.- cules.
  • the moving ions cause un-ionized gas to be placed in motion so that a new supply of cool u1u-ionized gas is constantly being drawn past the arc.
  • the ions which are moved into the venting slots will cause the arc to loop or bow somewhat into the slots since the arc attempts to follow the movement of the ions.
  • the reference numeral l5 designates a panel upon which the interrupter of my invention is mounted.
  • 'I'he panel Il supports a frame i1 which carries a suitable operating mechanism generally indicated at I9.
  • the operating mechanism I! is not specifically claimed herein and may be of any suitable arrangement, as for instance, that shown in Patent No. 2,177,014, issued October 24, 1939, to W. M. Austin, and assigned to the assignee of the instant application.
  • the operating mechanism Il is adaptedI to actuate a pivoted contact carrying arm 2
  • supports a main bridging contact 2l, the ends of which are adapted to normally engage the main line contacts 21 and 29.
  • Connected to the main contact 21 is an arcing contact Il adapted to cooperate with a moving arcing contact Il carried by a suitable arm. 25 supported by the pivoted arm 2l.
  • the arc-extinguishing device 31 is more specifically illustrated in Figs. 2 to 5 inclusive, and comprises a back support plate Il of insulating material and a front support plate 4l also of insulating material, between which are disposed a plurality of plates of insulating material spaced from each other by plates of magneticmaterial.
  • Fig. 5 represents a group of plates disposed within the space indicated by the bracket at X in Fig. 2.
  • the lowermost plate 43 is constructed of insulating material and preferably of refractory or other material that is substantially free from substance which gives off gas when acted upon by an arc such for example as asbestos board, quartz, soap stone or titanium oxide.
  • Cold molded compositions as vfor instance a product known as artificial porcelain comprising 30% talc, 2% feldspar and 68% clay may also be used.
  • all materials which are refractory in nature and have the requisite mechanical strength are suitable for this purpose. The preference for non-gas forming materials will be made known hereinafter.
  • the plate 43 is provided with a notch or slot 45 extending from the lower end thereof inwardly and tapers from a relatively wide Width at the edge of the plate to a narrow slot-like portion at the closed end thereof.
  • the outline of the slot 45 is perhaps more clearly shown in Fig. 3.
  • the iron plates 41 also serve to produce a magnetic field to facilitate arc movement upwardly in the slot 45, as will be explained more fully hereinafter.
  • the plate 49 is similar in construction to plate 43, with the exception that it is somewhat shorter and is adapted to support a transversely extending plate 5
  • Two sets of plates 41 are also disposed between the plate 49 and a plate 5l, the latter plate being similar to plate 4I, with the exception that the entrance portion of its slot 45 has been extended and is of a smooth contour,
  • the insulating plates to the right of the portion indicated at X have identically the same slot contouras that shown by the plate 53 in Fig. 5.
  • the insulating plates to the left of the portion indicated at X have the same slot contour as plate 43.
  • Each of the plates 43, 43 and 53 of insulating material, as well as the plates 41 of magnetic material, are provided with apertures l1 as shown in Figures 3 and 5. These apertures permit the assembly ofthe respective plates in the order shown upon four tubular members. 53 of insulating material. 'I'he stack of plates is firmly held together by bolts 5i passing through the two lowermost tubular members 53 and the respective front and back supports 33 and 4i. Either side of the plate assembly ls provided with a cover plate 53 secured to the respective front and back supports by screws 35, as shown.
  • the plates 5i of magnetic material disposed in abutting relation with respect to the plates 43, are prevented from movement away from the plates 43 by means of bar members 51 secured to each of the side plates well as the cross-sectional area of the venting passage between the plates.
  • the plates of insulating material may 33, and which register with the rectangular detents 53 provided in the plates 5i.
  • the front support 4i is also provided with al lwhich are anchored to suitablefastening means not shown, provided in the panel.
  • the arc-extinguishing device 31 is positioned with respect to the fixed arcing contact 3
  • the back support plate 33 is provided with a semi-circular notch or detent 11 as more clearly shown in Figs. 2 and 3.
  • the support member 15 is adapted to register with the notch 11 when the arc-extinguishing structure 31 is in place.
  • the plates 41 of magnetic material cause the arc to be moved upwardly in the slots 45 towards the closed end thereof.
  • the magnetic reaction is increased by the transversely extending plates 5I disposed in abutting relation with the plates of insulating material 43.
  • the transverse plates 5I of magnetic material are of the same thickness as the plates 43 of insulating material, so that the plates 41 of magnetic material provide a venting space or channel between adjacent plates of insulating material that is free and unobstructed. Thus as the arc is drawn between the.
  • the plates of magnetic material 41 preferably have such a width that 'the space therebetween at the most constricted portion is from y. square inch to 3/4 square inch. I have found that if the cross-sectional area of the venting passages is too great, there is a marked tendency for the arc to elongate and be driven through the venting passages and out the open end thereof.
  • the shape of the slot 45 is of importance in obtaining free and unimpeded movement of the arc, particularly of the higher current values upwardly towards the closed ends of the slots.
  • a slot that varies in width from at its apex to 1/3" .at a point two inches removed therefrom has Substantially the proper taper at its upper or extremely narrow end.
  • the lower portion of the slot may increase in width more rapidly and so long as the sides thereof have a smooth contour and are of sumcient width to permit the moving arcing contact 33 to pass therethrough, no diiliculty is experienced in obtaining the requisite arc movement.
  • the shape of the slot 45 may be such that increases as l increases, where l is the distance measured along the axis of the slot from its apex and w is the width of the slot measured perpendicular to the axis.
  • the taper or the rate at which the slot changes its width may also be expressed as halving in width in every longitudinal distance of from to 2 inches.
  • deflecting members 13 In order to prevent gases resulting from an arc within the slots 45 at the time of contact separation or shortly thereafter from being directed downwardly and against the circuit interrupter contact mechanism, I have provided two opposed deflecting members 13 disposed on either side of the path of movement of the contact 33, and respectively secured to the side cover members 83.
  • the deflecting members 13 provide a throat or orifice-like passage in which moving contact 33 operates, and further provides a pocket immediately above the members, in which the gases are entrapped, deflected and caused to be directed upwardly in the event that the current being interrupted is suiliciently great to cause a blast of gas having a tendency for downward movement.
  • a successful arc-extinguishing struc-n ture may be produced by the use of spaced plates of insulating material without plates of magnetic material or other magnetic means disposed there between, as shown in Fig. 8.
  • correspond in shape to the plates 8
  • a further advantage in the use of magnetic material in the arc-extinguishing structure resides in the provision of means for movingthe arc quickly towards the apex of the slots in the plates of insulating material without movement of the arc beyond the ends of the plates.
  • a modified plate structure is illustrated in which plates of insulating material ill are spaced from each other by narrow plates 93 of magnetic material disposed on either side of the arc-receiving slot 95.
  • the magnetic eiect of the plates 93 of magnetic material is strengthened by the addition of a yoke 91, also of magnetic material, disposed about the upper end of the plate assembly.
  • the arc-extinguishing operation is performed in a manner as heretofore described.
  • Figs. 12 and 13 illustrate a further possibility of plate structure which constitutes alternate plates of insulating material having a. slot
  • the plates provide a spacing between the plates of insulating material and also -provide a strong magnetic field for moving the arc towards the closed end of the slot III.
  • 05 in this instance are of considerably greater length than the plates IDI so as to pro vide a suitable venting passage
  • a .circuit interrupter means for establishing an arc, an arc-extinguishing structure for extinguishing said arc comprising means of insulating material having a. V-shaped slot therein decreasing progressively 'in width from t ⁇ ne side lil in which said are is adapted to play, said slot thereof to the other and terminating in a constricted closed end tip, said constricted tip decreasing in width from no greater than oneeighth inch at a point at least two inches from its apex to no greater than one-sixteenfth inch at its apex, said means of insulating material having venting passages therethrough communicating at spaced intervals with at least the constricted tip ci said slot, means for moving said arc into said constricted tip where it is adapted to play until extinguished, and means for subjecting said arc to a blast of uri-ionized gas while playing 1n said constricted tip.
  • an arc extinguishing device comprising means of non-gas-forming insulating materia-.l having a tapered notch extending inwardly from one end thereof and a plurality of spaced venting passages leading from said tapered notch, means for establishing an arc within the larger portion of said notch, said tapered notch terminating in a.
  • constricted tip which progressively decreases in width to the closed end thereof and which has a width, at its entrance portion to preclude alternating current arcs above a predetermined instantaneous current magnitude from entering therein, and means for moving said arc laterally within said notch and into said constricted tip following decay of the instantaneous current below said predetermined magnitude, said means causing a blast of 1in-ionized gas through the are stream and the venting es in said means of insulating material to assist in extinguishing the src.
  • an arc-extinguishing structure for extinguishing said arc comprising a plurality of plates of insulating material having through venting spaces therebetween and slots of V-shape in which said arc is adapted to play, said slots decreasing progressively in width from one side thereof to the other and terminating in the constricted closed end tip, said constricted tip de.
  • an arc-extinguishing device comprising a plurality of spaced plates of non-gas-formlng insulating material, said plates having substantially aligned tapered slots extending inwardly from one of their ends means for establishing an arc within the larger portion of said slots, said slots terminating in constricted tips which progressively decrease in width to the closed ends thereof and have a width wt their entrance portion to preclude alternating current arcs -above a predetermined instantaneous current magnitude from entering therein, and magnetic means for moving said arc laterally within said slots and into said constricted tips following decay of the instantaneous current below said predeterminedl magnitude, said magnetic means causing a blast of un-ionized gas through the arc stream and the spaces between the plates of insulating material to assist in extinguishing the arc.
  • an arc-extinguishing device comprising a stack of plates of insulating material. means spacing said pistes a preventing passages, said plates being substantially.
  • an arc-extinguishing device comprising a stack of plates of insuiating material, means spacing said platea a predetermined distance from each other to provide vent passages therebetween, said plates being substantially free from materials which give oi!
  • an arc-extinguishing device comprising a stack of plates of insulating material, means spacing said plates a predetermined distance from each other to provide vent passages through the stack, said plates being of refractory material and having elongated tapered notches therein which terminate in a constricted tip decreasing progressively in width from no greater than one-eighth inch at a point at least two inches from the closed end of the notches to no greater than one-sixteenth inch at the closed end, means for establishing an arc within said aligned notches, and plates o! magnetic material disposed at spaced intervals in the stack of plates of insulating material to provide an intense magnetic field for moving the arc into the constricted tips of said notches where it plays until extinguished.
  • an arc-extinguishing device comprising means of insulating material substantially free from material which gives of! gas when acted upon by an arc, said means of insulating material denning an elongated V-shaped notch and a plurality of spaced venting passages therethrough communicating at least with the closed end of said notch, means for establishing an arc within said notch, and means ofxnagnetic material embedded in said means of insulating material but disposed outside said venting passages for producing a magnetic field to move the are toward the closed end of said notch where it isadapted to play without substantial looping into said venting passages.
  • an arc-extinguishing device comprising a stack of plates of insulating material, said plates being substantially free from materials which give oi! more than a small quantity of gas when acted upon by an arc and having elongated tapered notches extending inwardly from one end thereof', means spacing said plates from each other to provide venting passages therebetween in alignment with the longitudinal axes of said notches, means for establishing an arc within said notches, and plate means of magnetic material disposed at intervals in the stack but disposedoutside said venting passages for producing a magnetic ileld to move the arc toward the closed end of said notches i and a blast of gas through the arc to aid in extinguishing the arc, said plates of insulating material being spaced from each other a distance to prevent substantial movement of the arc therebetween.
  • an arc-extinguishing device comprising a stack of plates oi' insulating material, said plates of insulating material being substantially free from materials which give of! gas when acted upon by an arc and having slots of V-shape therein, plates of magnetic material disposed between said plates of insulating material on either side of said slots and extending longitudinally of said plates of insulating material to provide vent passages of predetermined cross-sectional area in alignment with said lots, means for drawing an arc within said slots, said plates of magnetic material providing a magnetic ileld for moving the arc toward the closed ends of said slots, and additional plates of. magnetic material disposed transversely of said longitudinally disposed plates of magnetic material for strengthening the magnetic reaction for moving said arc, said plates of insulating material being spaced from each other a distance to prevent substantial movement of the arc therebetween.
  • an arc-extinguishing device comprising a stack of plates of insulating material, said plates of insulating material being substantially free from materials which give of! gas when acted upon by an arc and having aligned slots of V-shape therein, plates of magnetic material disposed between said plates of insulating material on either side of said aligned slots and extending longitudinally of said plates of insulating material to provide vent passages of predetermined cross-sectional area in alignment with said slots, means for drawing an arc within said aligned slots, said plates of magnetic material providing a magnetic ileld for moving the arc against the closed ends of said aligned slots where it is adapted to play until extinguished, and additional plates of magnetic material disposed transversely of said longitudinally disposed plates of magnetic material for strengthening the magnetic reaction for moving said arc, said additional plates of magnetic material being disposed in abutting relation to said plates of insulating material and having sub-4 stantially the same thickness so as to prevent ob
  • arc extinguishing means comprising a plurality of plates of insulating material, said plates being substantially free of material which gives off a gas when acted upon by an arc and having elongated tapered slots extending therein from one edge thereof, means for establishing an arc within said slots, said slots havinor a constricted portion which decreases progressively in 'width to the closed end thereof and is so narrow that alternating current arcs of relatively high instantaneous current magnitude will not enter therein but will permit entry only of arcs of less than a predetermined instantaneous current magnitude, and magnetic means for moving the arc laterally toward the closed ends of said slots, said arc playing outside said constricted portion until the instantaneous current has been reduced to said predetermined value whereupon it is moved by said magnetic means into said constricted portion where it is quickly cooled and extinguished- 14.
  • arc-extinguishing means of insulating -material comprising a plurality of plate portions, spaced from one-eighth inch to one-fourth inch apart, said plate portions being free from large quantities of materials which give off a gas when acted upon by an arc and having a thickness from one-eighth inch to one-fourth inch, said plate portions having slots extending therein from one edge thereof, means for establishing an arc within said slots, and members of magnetic material to assist movement of the arc against the closed end of said slots, the magnetic ileld produced by said magnetic members also ⁇ causing a blast of cool un-ionized gas to be moved through the arc as it plays against the closed end of said slots.
  • arc-extinguishing means comprising a plurality of plates of insulating material, spaced from one-eighth inch to oriefourth inch apart, said plates being substantially free from materials which give off a gas when acted upon by an arc and having a thickness from vone-eighth inch to -one-fourth inch, said plates having aligned slots extending therein from one edge thereof, means for establishing an arc within said slots, and members of magnetic material disposed between said plates of insulating material longitudinally thereof on either side of said slots to assist movement of the arc against the closed end of said slots, said members of magnetic material serving to space said plates of insulating material apart and be ⁇ ing displaced laterally from each other so as t provide a venting space betweenadiacent plates of insulating material having a cross-sectional area 'of from one-eighth square inch to threefourths square inch, the thickness of said plates of insulating material. the spacing betweensaid plates and the cross-section
  • arc-extinguishing means comprising a plurality of spaced plates of insulating material, said plates of insulating material being of substantially refractory material and having elongated tapered notches therein aligned at least at the open ends thereof, a pair of contacts at least one of which is adapted to be moved within said aligned notches to establish an arc therein, and means disposed on either side of the path of movement of said movable contact adjacent the open ends of said aligned notches and arranged toclose the open ends of said notches except for the space required for contact movement to cause the gas produced by said arc upon separation of said contacts to expand laterally and in a direction away from said contacts so as to prevent said gas from being blown out of the open end of said notches.
  • arc extinguishing means comprising means of insulating material having an elongated V-shaped groove extending inwardly from one end thereof, said means of insulating material having spaced venting passages therethrough communicating With said groove, contact means separable within the open end of said groove for establishing an arc, and lining members disposed laterally of said contact means and arranged to close in part the open end of said groove to prevent arc gases from being blown out of said groove in the direction of said contact means.
  • arc extinguishing means comprising a plurality of plates of insulating material each of said plates having an elongated V-shaped slot extending inwardly from one end thereof, means spacing said plates from each other to provide venting passages therebetween, con'tact'means separable within the open ends of said slots for establishing an arc, and deiiecting members of insulating material disposed laterally of said contact means adjacent the ends of said plates to substantially close the spaces between said plates on each side of said slots, said deecting members extending inwardly with respect to the open ends of said slots to provide a constricted entrance passage to saidslots for preventing arc gases from being blown out of said slots in the direction of said contact means.
  • arc extinguishing means comprising a plurality of plates of insulating material having elongated V-shaped slots extending inwardly from .one end thereof, means for establishing an arc withiny said slots, andplates of U-shaped magnetic material disposed between said plates of insulating material having the legs of the U on opposite sides of said slots for moving said arc towards the closed ends of said slots, the transverse portion of said plates of magnetic material extending beyond the plates LEON n. LUDWIG.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
US216884A 1938-07-01 1938-07-01 Circuit interrupter Expired - Lifetime US2243038A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US216884A US2243038A (en) 1938-07-01 1938-07-01 Circuit interrupter
NL61310D NL61310C (enrdf_load_stackoverflow) 1938-07-01 1939-06-16
CH214484D CH214484A (fr) 1938-07-01 1939-06-29 Interrupteur électrique.
FR857156D FR857156A (fr) 1938-07-01 1939-06-30 Perfectionnements aux interrupteurs
BE435201D BE435201A (enrdf_load_stackoverflow) 1938-07-01 1939-06-30
GB19045/39A GB530199A (en) 1938-07-01 1939-06-30 Improvements in or relating to electric circuit interrupters having arc extinguishingstructures
DES137679D DE735829C (de) 1938-07-01 1939-07-01 Stromunterbrecher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US216884A US2243038A (en) 1938-07-01 1938-07-01 Circuit interrupter

Publications (1)

Publication Number Publication Date
US2243038A true US2243038A (en) 1941-05-20

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Application Number Title Priority Date Filing Date
US216884A Expired - Lifetime US2243038A (en) 1938-07-01 1938-07-01 Circuit interrupter

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US (1) US2243038A (enrdf_load_stackoverflow)
BE (1) BE435201A (enrdf_load_stackoverflow)
CH (1) CH214484A (enrdf_load_stackoverflow)
DE (1) DE735829C (enrdf_load_stackoverflow)
FR (1) FR857156A (enrdf_load_stackoverflow)
GB (1) GB530199A (enrdf_load_stackoverflow)
NL (1) NL61310C (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575738A (en) * 1946-12-28 1951-11-20 Westinghouse Electric Corp Circuit interrupter
US2611060A (en) * 1945-10-20 1952-09-16 Monitor Controller Co Circuit controlling apparatus
US2646482A (en) * 1947-01-11 1953-07-21 Ite Circuit Breaker Ltd High-voltage circuit breaker
US2648742A (en) * 1949-09-14 1953-08-11 Ite Circuit Breaker Ltd Arc chute plate
US2687461A (en) * 1949-02-23 1954-08-24 Westinghouse Electric Corp Air-type circuit interrupter
US2713101A (en) * 1951-05-03 1955-07-12 Reyrolle A & Co Ltd Arc chutes for air-break circuit-breakers
US2871320A (en) * 1955-12-19 1959-01-27 Bbc Brown Boveri & Cie Heavy duty switch with magnetic blasting
US2888539A (en) * 1955-09-22 1959-05-26 Merlin Gerin Arc-extinction chambers for circuit-breakers
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
US2953666A (en) * 1956-12-31 1960-09-20 Allen Bradley Co High voltage air break switch
US6297465B1 (en) * 2000-05-25 2001-10-02 Eaton Corporation Two piece molded arc chute
US6518530B2 (en) * 1999-11-25 2003-02-11 Moeller Gmbh Current-limiting contact arrangement

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068335B (enrdf_load_stackoverflow) * 1959-11-05
DE961120C (de) * 1952-12-05 1957-04-04 Siemens Ag Niederspannungs-Hochleistungs-Schmelzsicherung, insbesondere fuer Wechselstromnetze
BE517653A (enrdf_load_stackoverflow) * 1952-12-22 Merlin Gerin
DE1052498B (de) * 1956-07-03 1959-03-12 Calor Emag Elektrizitaets Ag Vorrichtung zur Beeinflussung des zeitlichen Verlaufes der Lichtbogenspannung in Schaltgeraeten
US2900477A (en) * 1956-09-21 1959-08-18 Westinghouse Electric Corp Circuit interrupters
BE562665A (enrdf_load_stackoverflow) * 1956-11-26
DE1150734B (de) * 1957-11-06 1963-06-27 Sachsenwerk Licht & Kraft Ag Lichtbogenloeschkammer
DE1055081B (de) * 1958-05-03 1959-04-16 Voigt & Haeffner Ag Lichtbogenloescheinrichtung fuer elektrische Schalter
FR1224133A (fr) * 1959-01-20 1960-06-22 Merlin Gerin Perfectionnements à des dispositifs d'extinction d'arc
DE1168529B (de) * 1961-06-26 1964-04-23 Licentia Gmbh Elektrisches Schaltgeraet mit Einrichtung zur Lichtbogenloeschung
BE635433A (enrdf_load_stackoverflow) * 1962-07-27

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611060A (en) * 1945-10-20 1952-09-16 Monitor Controller Co Circuit controlling apparatus
US2575738A (en) * 1946-12-28 1951-11-20 Westinghouse Electric Corp Circuit interrupter
US2646482A (en) * 1947-01-11 1953-07-21 Ite Circuit Breaker Ltd High-voltage circuit breaker
US2687461A (en) * 1949-02-23 1954-08-24 Westinghouse Electric Corp Air-type circuit interrupter
US2648742A (en) * 1949-09-14 1953-08-11 Ite Circuit Breaker Ltd Arc chute plate
US2713101A (en) * 1951-05-03 1955-07-12 Reyrolle A & Co Ltd Arc chutes for air-break circuit-breakers
US2888539A (en) * 1955-09-22 1959-05-26 Merlin Gerin Arc-extinction chambers for circuit-breakers
US2871320A (en) * 1955-12-19 1959-01-27 Bbc Brown Boveri & Cie Heavy duty switch with magnetic blasting
US2942083A (en) * 1956-12-24 1960-06-21 Westinghouse Electric Corp Circuit interrupters
US2953666A (en) * 1956-12-31 1960-09-20 Allen Bradley Co High voltage air break switch
US6518530B2 (en) * 1999-11-25 2003-02-11 Moeller Gmbh Current-limiting contact arrangement
US6297465B1 (en) * 2000-05-25 2001-10-02 Eaton Corporation Two piece molded arc chute

Also Published As

Publication number Publication date
NL61310C (enrdf_load_stackoverflow) 1948-02-16
CH214484A (fr) 1941-04-30
DE735829C (de) 1943-05-31
GB530199A (en) 1940-12-06
BE435201A (enrdf_load_stackoverflow) 1939-07-08
FR857156A (fr) 1940-08-29

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