US2981814A - Circuit interrupters - Google Patents

Circuit interrupters Download PDF

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Publication number
US2981814A
US2981814A US635400A US63540057A US2981814A US 2981814 A US2981814 A US 2981814A US 635400 A US635400 A US 635400A US 63540057 A US63540057 A US 63540057A US 2981814 A US2981814 A US 2981814A
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United States
Prior art keywords
pair
impedance
disposed
terminal
bushing
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
US635400A
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English (en)
Inventor
Robert E Friedrich
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 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 BE564098D priority Critical patent/BE564098A/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US635400A priority patent/US2981814A/en
Priority to ES0239098A priority patent/ES239098A1/es
Priority to GB1132/58A priority patent/GB843031A/en
Priority to CH358846D priority patent/CH358846A/de
Priority to FR1198483D priority patent/FR1198483A/fr
Priority to DEW22614A priority patent/DE1106838B/de
Application granted granted Critical
Publication of US2981814A publication Critical patent/US2981814A/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
    • 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
    • H01H33/16—Impedances connected with contacts
    • 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
    • H01H33/008—Pedestal mounted switch gear combinations
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • 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
    • H01H33/027—Integrated apparatus for measuring current or voltage
    • 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
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc

Definitions

  • This invention relates to circuit interrupters in general, and, more particularly, to arc-extinguishing structures for circuit interrupters of the single-bushing type.
  • Still a further object of the present invention is to provide an improved single-bushing type of circuit interrupter having a pair of arc-extinguishing units at opposite ends of a terminal bushing, in which a mechanism is provided operable to effect a simultaneous operation of both arc-extinguishing units.
  • Another object of the present invention is to provide an improved single-bushing type of circuit interrupter having a pair of arc-extinguishing units disposed at opposite ends thereof associated with a pair of parallel-disposed impedance current interrupting units, in which the mechanism is so arranged that the impedance current interrupting units are actuated following an actuation of the main-current interrupting units.
  • Still a further object of the present invention is to adapt a single-bushing type of interrupter having two areextinguishing units at opposite ends thereof suitable for use with a relatively heavy gas, such as sulfur hexafluoride (SFB)-
  • a relatively heavy gas such as sulfur hexafluoride (SFB)
  • Figure l is a somewhat diagrammatic, sectional view taken longitudinally through a single-bushing type of circuit interrupter embodying the principles of the present invention, with the contact structure being illustrated in the partially open-circuit position;
  • Fig. 2 is also a somewhat diagrammatic, side elevational view, partially in vertical section. of a modified type of single-bushing circuit interrupter, having a parallel pair of impedance current interrupting units, the contact structure being illustrated in the closed-circuit position.
  • the reference numeral 1 generally designates a circuit interrupter of the single-bushing type, having a pair of arc-extinguishing units 2 disposed at the outer ends thereof.
  • the arc-extinguishing units 2 are positioned internally within a pair of weatherproof casings 3, 4, made of a suitable weatherproof insulating material,
  • closure plate castings 11, 12 constituting terminal means, each of which has a relatively stationary contact 13 integrally cast therewith, and both closure castings 11, 12 are bolted to the outer mounting flanges 8, as shown.
  • suitable ring-shaped gaskets 14 may be employed, being disposed between the closure plate castings 11, 12 and the outer ends of the porcelain casings 3, 4 to insure a gas-tight construction. Also disposed between the outer mounting flanges 8 of the easings 3, 4 and flange portions 15 of the closure castings 11, 12 is a pair of ring-shaped plates 16 having apertured terminal lug portions 17 formed therewith. The line connections to the circuit interrupter 1 are made to these terminal lug portions 17.
  • Each arc-extinguishing unit 2 includes a movable rodshaped contact 18, cooperable with a relatively stationary contact 13 to establish an are, designated by the reference numeral 19.
  • the movable contact 18 is fixedly secured by a pin connection 20 to a movable piston 21 slidable within an operating cylinder 22, and having an orifice member 23 of insulating material secured thereto.
  • the movable contact 18, the orifice member 23 and the piston 21 all move together as a unit during the opening
  • the piston 21 and operating cylinder 22 form a fluid-blast puffer structure highly effective to extinguish the are 19.
  • the apertured guide plate 25 has an opening 25a therethrough, through which the movable contact 18 is guided. From an inspection of Fig. 1, it will be apparent that inward movement of the piston 21, within the operating cylinder 22, will compress the fluid, such as a suitable arc-extinguishing liquid, or gas, within the region 26. and will force this compressed fluid out through the orifice 27 of the orifice member 23 so that the fluid is directed against the established are 19.
  • the fluid such as a suitable arc-extinguishing liquid, or gas
  • each movable contact 18, as at 28 is a link 29, which links 29 are pivotally connected, as at 30, to a pair of bell-cranks 31.
  • the bell-cranks 31 are stationarily pivotally mounted, as at 32, to brackets 33, which may be welded to the inside of the mechanism housing 5.
  • the lower arms 34 of the bell-cranks 31 are pivotally connected together at 35 to a solenoid plunger 36, the latter being actuated by a suitable solenoid mechanism disposed within a mechanism compartment 37.
  • Other conventional operating mechanisms either pneumatic or hydraulic, may be employed.
  • Surrounding the mechanism compartment 37, and serving to support the mechanism housing 5, is a truncated conical support member or grounded pedestaltype supporting means 38, which may be mounted upon a suitable base 39.
  • the terminal bushing 40 Extending through the mechanism housing 5, supported in a ring-shaped mounting plate 24, is a somewhat conventional terminal bushing 40, having a pair of current transformers 41 disposed thereabout.
  • the terminal bushing 40 may be of the condenser type, having a terminal stud 42 passing therethrough.
  • the ends of the terminal stud 42 may be threaded, as at 43, thereby threadedly supporting the inner ends 44 of the pair of operating cylinders 22.
  • Surrounding the ends of the condenser winding section associated with the terminal bushing 40 is a pair of tapered insulating porcelain shells 45, having petticoats 46 to increase the surface breakdown path.
  • a centrally disposed, grounded, mounting flange 47 may be positioned between the shells 45 encircling the central portion of the condenser winding section of the terminal bushing 40.
  • the mounting flange 47 rigidly supports the terminal bushing 40 to the plate 24.
  • a suitable arc-extinguishing fluid such as a liquid, or gas
  • a suitable arc-extinguishing fluid is disposed within the inner region 49 of the circuit interrupter 1.
  • SP arc-extinguishing fluid
  • Particular advantage can be achieved by the use of SP as mentioned heretofore.
  • the remarkable arc-extinguishing characteristics of SP gas are set out, and claimed, in United States Patent 2,757,261, issued July 31, 1956, to Harry J. Lingal, Thomas E. Browne, Jr., and Albert P. Strom, and assigned to the assignee of the instant application.
  • the solenoid plunger, or operating rod 36 is moved downwardly within the mechanism compartment 37, by the functioning of the mechanism disposed therein.
  • the downward movement of the solenoid plunger 36 effects rotation of the bell-cranks 31 about their pivotal supports 32, and thereby eflects inward motion of the insulating links, or operating rods 29.
  • the extinction of the arcs 19 is effected by the foreing of fluid out of the regions 26 within the operating cylinders 22 of the puffer structures and out through the orifice members 23 and into engagement with the arcs 19. Arc extinction, and hence circuit interruption, is quickly achieved, and the movable contacts 18 are maintained in their inward positions all the time that the interrupter is in the open circuit position.
  • the solenoid plunger 36 When it is desired to efiect a closing of the interrupter 1, the solenoid plunger 36 is moved upwardly, as brought about by the use of suitable closing springs disposed internally within the mechanism compartment 37. This will elfect, through the linkage, closing engagement between the relatively movable and stationary contacts 13, 18.
  • the current path through the interrupter then obviously includes the terminal plates 16, closure plate castings ll, 12, stationary contacts 13, movable contacts 18, flexible connectors 60, and through the conducting end portions 44 of the operating cylinders 22 to the terminal stud 42, which passes centrally completely through the terminal bushing 40.
  • the intermediate sleeve portion 47 of the terminal bushing 40 is at ground potential, simple ring-shaped current transformers 41 may be used to measure the flow of current through the interrupter l.
  • the structure is simple and highly effective, since multibreaks are employed in connection with the two serially related arcextinguishing units 2.
  • the intermediate structure, including the mechanism housing and the supporting pedestal-type shell 38, is all at ground potential, as is the mechanism disposed within the mechanism compartment 37. It will be obvious that the circuit interrupter 1 may be mounted either horizontally or vertically depending upon the application.
  • Fig. 2 illustrates a modification of the invention in which both arc-extinguishing units 2 are electrically paralleled by a pair of serially related impedance means 61, each impedance means 61 assuming the form of a resistor 62. Both impedance means 61 are in series with a pair of serially related impedance interrupting units. generally designated by the reference numeral 63.
  • Each impedance interrupting unit 63 includes a relatively stationary contact 64 mounted upon a hook-shaped conducting spring support 65, the latter being supported by any suitable means interiorly within a hollow head casting 66, the latter being supported upon a hollow upstand- 4 ing insulating pedestal casing or column 67 enclosing the resistor element 62.
  • a movable contact 68 Cooperable with the relatively stationary contact 64 is a movable contact 68, the latter being fixedly mounted, by means of a spider 69, within a movable piston cylinder 70.
  • the left-hand end of the movable piston cylinder '70 of the left-hand impedance interrupting unit 63 terminates in an insulating orifice portion 71 having an orifice opening 72 provided therethrough.
  • Trunnions 70a jut laterally out from the side walls of the movable piston cylinder 70, having pivotally connected thereto a pair of insulating links 73.
  • the movable piston cylinder 70 slides over a stationary supporting cylinder 75 forming a pufier structure.
  • the opening movement of the movable piston cylinder 70 over the stationary supporting cylinder 75 generates pressure within the region 76 within piston cylinder 70, and thereby causes an ejection of compressed gas out through the orifice opening 72 into engagement with the residual current are established between the relatively stationary and movable contacts 64, 68.
  • the two pairs of insulating links, or operating rods 73 are preferably pivotally connected to the outer free ends of a T-shaped bell-crank member, generally designated by the reference numeral 77, and pivotally supported upon a stationary pivot pin 78.
  • the pivot pin 78 is stationarily supported internally within a hollow mechanism housing 79, suitably supported upon a hollow, upstanding insulating casing or third column 80, the latter resting upon a mechanism housing 5a, generally similar to the mechanism housing 5 of Fig. 1.
  • An interconnecting housing 97 comprising insulating casings 98 and mechanism housing 79 interconnects the pedestal columns 67. This permits circulation of the dielectric gas SF
  • the insulating operating rods 73 may be pivotally connected by pivot pins 81, 82 to the outer ends of arms 83, 84, respectively, of T-shaped bell-crank member 77.
  • a third arm 85 integrally formed with the T- shaped bell-crank member 77 is pivotally connected, by a pivot pin 86, to an insulating operating rod 87 extending downwardly through the hollow casing 80, through the mechanism housing 5a, and terminating within a mechanism compartment 37a.
  • the mechanism housing 5a is grounded, and is supported at the upper end of a steel pedestal-type support cylinder 88, the latter resting upon a base 89.
  • the stationary contact housings 90 disposed at the outer ends of the hollow casings 3, 4, may contain the stationary contacts 13, the latter supported therein in a manner similar to that illustrated in Fig. 1.
  • the arc-extinguishing units 2 disposed internally within the hollow casings 3, 4 may be identical to those illustrated in Fig. l.
  • the porcelain shells 45 of the terminal bushing 40 of Fig. 1 are omitted in the modified terminal bushing 40a, illustrated in Fig. 2.
  • the arc-extinguishing units 2 within the hollow casings 3, 4 of the modified interrupter 91 shown in Fig.
  • terminal bushing 40a may be supported on a pair of apertured support plates 24a secured to the inside of the mechanism housing 5a.
  • Line connections may be made to line terminals 93, 94, secured to the outer side walls of the stationary contact housings 90.
  • the stationary contact housings 90 may be additionally supported by means of upstanding, hollow, insulating casings 95, the latter resting upon suitable pedestal supports 96.
  • the mechanism disposed within the mechanism compartment 37a is so arranged as to first eifect downward opening movement of the pull rod 36, which actuates the arc-extinguishing units 2, and thereby effects extinction of the main current arcs 19 (Fig. 1). After these arcs 19 are extinguished, the mechanism within mechanism compartment 37a functions to etfect downward opening movement of the insulating operating rod 87. This latter movement will cause opening rotation of the T-shaped bell crank 77, and thereby effect, through the insulating rods 73, opening movement of the two movable piston cylinders 70 effecting extinction of the residual current arcs in a manner as previously described.
  • the presence of the resistors 62 will facilitate the extinction of the main current arcs 19 by affording a parallel electrical path for the current flow through the interrupter 91.
  • the resistors 62 will help to divide the voltage equally across the arc-extinguishing units 2 of Fig. 2.
  • the resistors 62 will not only reduce the magnitude of the current flow through the interrupter 91, but also the power factor will be improved to render thereby are extinction more quickly accomplished within the impedance interrupting units 63.
  • the mechanism disposed within the mechanism compartment 37a will function to effect the upward movement of both operating rod 87 and pull rod 36. This will effect, through the linkage, closing movement of the contact structures, so that the current path through the interrupter 91 will again be completed.
  • the use of the impedance means 61 comprising an impedance assemblage 99 of Fig. 2 renders the interrupter 1 of Fig. 1 suitable for very high-voltage and high-power application.
  • the use of the puffer structures, associated with the arc-extinguishing units 2 and the impedance interrupting unit 63, in combination with a heavy gas, such as SP provides a very effective interrupting device, since the gas is compressed immediately adjacent to the point of application at the arcs.
  • the terminal bushings 40, 40a may employ standard parts, which feature is highly desirable from an economic and manufacturing standpoint.
  • the disclosed structure has the particular advantage of enabling the use of standard current transformers 41 surrounding a grounded, intermediate metallic sleeve 47, 47a.
  • a single-bushing type of fluid-blast circuit interrupter including pedestal-type grounded supporting means, a single terminal bushing having its central portion supported by said grounded supporting means, said single terminal bushing including an elongated conductor extending axially therethrough, the axial length of the terminal bushing and the pedestal-type grounded supporting means being disposed substantially at right angles to each other, a pair of oppositely extending insulating casings surrounding at least the end portions of the terminal bushing and extending outwardly from said grounded supporting means, terminal means disposed at the outer ends of said oppositely extending casings and supporting a pair of relatively stationary contact structures, a pair of movable contacts movable toward each other during the opening operation and cooperable with the relatively stationary contact structures to establish a pair of serially related arcs, a fluidblast puffer structure associated with each movable contact and operable to force a blast of fluid toward the respective arc to effect its extinction, operating-rod means extending generally longitudinally of said terminal bushing and operable to effect simultaneous operation of said fluid-blast puff
  • a single bushing type of fluid blast circuit interrupter including pedestal type grounded supporting means, a single terminal bushing having its central portion supported by said grounded supporting means, said single terminal bushing including an elongated conductor extending axially therethrough, the axial length of the terminal bushing and the pedestal type grounded supporting means being disposed substantially at right angles to each other, a pair of oppositely extending insulating casings surrounding at least the end portions of the terminal bushing and extending outwardly from said grounded supporting means, terminal means disposed at the outer ends of said oppositely extending casings and supporting a pair of relatively stationary contact structures, a pair of movable contacts movable toward each other during the opening operation and cooperable with the relatively stationary contact structures to establish a pair of serially related arcs, a fluid blast puffer structure associated with each movable contact and operable to force a blast of fluid toward the respective arc to effect its extinction, operating rod means extending generally longitudinally of said terminal bushing and operable to effect simuitaneous operation of said fluid blast
  • a single bushing type of fluid blast circuit interrupter including pedestal type grounded supporting means, a single terminal bushing having its central portion supported by said grounded supporting means, said single terminal bushing including an elongated conductor extending axially therethrough, the axial length of the terminal bushing and the pedestal type grounded supporting means being disposed substantially at right angles to each other, a pair of oppositely extending insulating casings surrounding at least the end portions of the terminal bushing and extending outwardly from said grounded support ing means, terminal means disposed at the outer ends of said oppositely extending casings and supporting a pair of relatively stationary contact structures, a pair of movable contacts movable toward each other during the opening operation and cooperable with the relatively stationary contact structures to establish a pair of serially related arcs, a fluid blast puffer structure associated with each movable contact and operable to force a blast of fluid toward the respective arc to effect its extinction, operating rod means extending generally longitudinally of said terminal bushing and operable to effect simultaneous operation of said fluid blast puflFer

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  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US635400A 1957-01-22 1957-01-22 Circuit interrupters Expired - Lifetime US2981814A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE564098D BE564098A (US06858664-20050222-C00036.png) 1957-01-22
US635400A US2981814A (en) 1957-01-22 1957-01-22 Circuit interrupters
ES0239098A ES239098A1 (es) 1957-01-22 1957-12-13 Un interruptor de circuito
GB1132/58A GB843031A (en) 1957-01-22 1958-01-13 Improvements in or relating to fluid blast electric circuit interrupters
CH358846D CH358846A (de) 1957-01-22 1958-01-20 Mit einem Löschmittel arbeitender Ausschalter
FR1198483D FR1198483A (fr) 1957-01-22 1958-01-21 Perfectionnements apportés aux disjoncteurs
DEW22614A DE1106838B (de) 1957-01-22 1958-01-22 Elektrischer Schalter mit in Reihe geschalteten Unterbrechungseinrichtungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US635400A US2981814A (en) 1957-01-22 1957-01-22 Circuit interrupters

Publications (1)

Publication Number Publication Date
US2981814A true US2981814A (en) 1961-04-25

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Application Number Title Priority Date Filing Date
US635400A Expired - Lifetime US2981814A (en) 1957-01-22 1957-01-22 Circuit interrupters

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US (1) US2981814A (US06858664-20050222-C00036.png)
BE (1) BE564098A (US06858664-20050222-C00036.png)
CH (1) CH358846A (US06858664-20050222-C00036.png)
DE (1) DE1106838B (US06858664-20050222-C00036.png)
ES (1) ES239098A1 (US06858664-20050222-C00036.png)
FR (1) FR1198483A (US06858664-20050222-C00036.png)
GB (1) GB843031A (US06858664-20050222-C00036.png)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214544A (en) * 1961-03-24 1965-10-26 Westinghouse Electric Corp Cooling structures for closed-system gaseous electrical apparatus having terminal bushings
US3345473A (en) * 1965-12-20 1967-10-03 S & C Electric Co High voltage gas type circuit interrupters in tandem with a center break disconnecting switch
US3485971A (en) * 1967-06-19 1969-12-23 Cod Nv Fully enclosed switching devices for high voltages
US3824361A (en) * 1972-01-28 1974-07-16 Siemens Ag High-voltage electric circuit breaker
US3919511A (en) * 1972-05-31 1975-11-11 Siemens Ag High-voltage apparatus such as a circuit breaker or the like equipped with means for preventing impairment of the electric field within the apparatus enclosure
US3922512A (en) * 1974-02-19 1975-11-25 Allis Chalmers Resistor switch synchronizing operating mechanism
US3959577A (en) * 1974-06-10 1976-05-25 Westinghouse Electric Corporation Hermetic seals for insulating-casing structures
US4009458A (en) * 1975-04-15 1977-02-22 Hitachi, Ltd. Puffer type gas circuit breaker
US4059741A (en) * 1975-03-10 1977-11-22 Hitachi, Ltd. Puffer type gas circuit breaker
US4103130A (en) * 1975-01-29 1978-07-25 Westinghouse Electric Corp. Resistor applications for high-power circuit breakers
US4225761A (en) * 1977-10-12 1980-09-30 General Electric Company Electric circuit breaker comprising a plurality of vacuum interrupters simultaneously operated by a common operator
US4423298A (en) * 1980-10-20 1983-12-27 Hitachi, Ltd. Gas circuit breaker of resistance breaking type
US4527220A (en) * 1977-04-19 1985-07-02 Coq B.V. Multiphase switchgear for high voltages

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443674A (en) * 1982-03-31 1984-04-17 Westinghouse Electric Corp. Circuit interrupter closing resistance mechanism

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US2055345A (en) * 1934-04-13 1936-09-22 Gen Electric Electric oil circuit breaker
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
GB523420A (en) * 1939-01-05 1940-07-15 William Anselm Coates Improvements in and relating to high tension electric switches
US2275872A (en) * 1939-06-27 1942-03-10 Gen Electric Gas blast electric circuit breaker
US2279536A (en) * 1938-05-27 1942-04-14 Bbc Brown Boveri & Cie Electric circuit breaker
US2429311A (en) * 1942-07-30 1947-10-21 Gay Maurice Jean Circuit breaker with blowing device
US2454586A (en) * 1945-12-18 1948-11-23 Reyrolle A & Co Ltd Gas-blast electric circuit breaker
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US2470628A (en) * 1944-05-24 1949-05-17 Westinghouse Electric Corp Circuit interrupter
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device
CA485774A (en) * 1952-08-12 E. Friedrich Robert Circuit interrupters
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DE669150C (de) * 1934-12-15 1938-12-17 Devag Due & Co Elek Zitaetsges Leistungstrennschalter mit Lichtbogenloeschung durch Druckluft
DE695435C (de) * 1935-06-06 1940-08-24 Siemens Schuckertwerke Akt Ges Unterbrechungseinrichtung fuer elektrische Stroeme mit Lichtbogenloeschung durch ein stroemendes Loeschmittel
DE690054C (de) * 1936-12-16 1940-04-13 Aeg Elektrischer Gasschalter
FR866412A (fr) * 1940-04-06 1941-08-12 Merlin Gerin Interrupteur à gaz comprimé pour haute tension
BE501473A (US06858664-20050222-C00036.png) * 1950-03-10 Merlin Gerin
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GB718401A (en) * 1951-05-25 1954-11-10 Vickers Electrical Co Ltd Improvements relating to gas-blast circuit-breakers
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA485774A (en) * 1952-08-12 E. Friedrich Robert Circuit interrupters
US1706746A (en) * 1924-03-17 1929-03-26 Gen Electric Electric switch
US2055345A (en) * 1934-04-13 1936-09-22 Gen Electric Electric oil circuit breaker
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
US2279536A (en) * 1938-05-27 1942-04-14 Bbc Brown Boveri & Cie Electric circuit breaker
GB523420A (en) * 1939-01-05 1940-07-15 William Anselm Coates Improvements in and relating to high tension electric switches
US2275872A (en) * 1939-06-27 1942-03-10 Gen Electric Gas blast electric circuit breaker
US2429311A (en) * 1942-07-30 1947-10-21 Gay Maurice Jean Circuit breaker with blowing device
US2470628A (en) * 1944-05-24 1949-05-17 Westinghouse Electric Corp Circuit interrupter
US2459612A (en) * 1944-12-22 1949-01-18 Westinghouse Electric Corp Compressed gas circuit interrupter
US2454586A (en) * 1945-12-18 1948-11-23 Reyrolle A & Co Ltd Gas-blast electric circuit breaker
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US2748226A (en) * 1953-02-26 1956-05-29 Westinghouse Electric Corp Compressed-gas circuit interrupter
US2766348A (en) * 1953-04-28 1956-10-09 Asea Ab Compressed air breaker

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214544A (en) * 1961-03-24 1965-10-26 Westinghouse Electric Corp Cooling structures for closed-system gaseous electrical apparatus having terminal bushings
US3345473A (en) * 1965-12-20 1967-10-03 S & C Electric Co High voltage gas type circuit interrupters in tandem with a center break disconnecting switch
US3485971A (en) * 1967-06-19 1969-12-23 Cod Nv Fully enclosed switching devices for high voltages
US3824361A (en) * 1972-01-28 1974-07-16 Siemens Ag High-voltage electric circuit breaker
US3919511A (en) * 1972-05-31 1975-11-11 Siemens Ag High-voltage apparatus such as a circuit breaker or the like equipped with means for preventing impairment of the electric field within the apparatus enclosure
US3922512A (en) * 1974-02-19 1975-11-25 Allis Chalmers Resistor switch synchronizing operating mechanism
US3959577A (en) * 1974-06-10 1976-05-25 Westinghouse Electric Corporation Hermetic seals for insulating-casing structures
US4103130A (en) * 1975-01-29 1978-07-25 Westinghouse Electric Corp. Resistor applications for high-power circuit breakers
US4059741A (en) * 1975-03-10 1977-11-22 Hitachi, Ltd. Puffer type gas circuit breaker
US4009458A (en) * 1975-04-15 1977-02-22 Hitachi, Ltd. Puffer type gas circuit breaker
US4527220A (en) * 1977-04-19 1985-07-02 Coq B.V. Multiphase switchgear for high voltages
US4225761A (en) * 1977-10-12 1980-09-30 General Electric Company Electric circuit breaker comprising a plurality of vacuum interrupters simultaneously operated by a common operator
US4423298A (en) * 1980-10-20 1983-12-27 Hitachi, Ltd. Gas circuit breaker of resistance breaking type

Also Published As

Publication number Publication date
DE1106838B (de) 1961-05-18
FR1198483A (fr) 1959-12-08
ES239098A1 (es) 1958-08-01
BE564098A (US06858664-20050222-C00036.png)
CH358846A (de) 1961-12-15
GB843031A (en) 1960-08-04

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