US2957063A - Pumped-gas circuit interrupter - Google Patents

Pumped-gas circuit interrupter Download PDF

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Publication number
US2957063A
US2957063A US719892A US71989258A US2957063A US 2957063 A US2957063 A US 2957063A US 719892 A US719892 A US 719892A US 71989258 A US71989258 A US 71989258A US 2957063 A US2957063 A US 2957063A
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United States
Prior art keywords
piston
contact
area
support plate
gas
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
US719892A
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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.)
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
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US719892A priority Critical patent/US2957063A/en
Priority to DEW25108A priority patent/DE1130028B/de
Priority to GB7513/59A priority patent/GB858791A/en
Priority to CH7041559A priority patent/CH368535A/de
Application granted granted Critical
Publication of US2957063A publication Critical patent/US2957063A/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
    • H01H33/70—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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc
    • H01H33/903—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 making use of the energy of the arc or an auxiliary arc and assisting the operating mechanism

Definitions

  • This invention relates to pumped-gas circuit interrupters and, more particularly, to pumped-gas circuit interrupters employing piston structures to eifect gas flow toward the established are.
  • a general object of the present invention is to provide an improved pumped-gas circuit interrupter, which will be more elfective than pumped-gas circuit interrupters heretofore employed in the industry.
  • a more specific object of the present invention is to provide an improved pumped-gas circuit interrupter utilizing a differential piston to effect gas flow toward the established arc, and in which the established arcing pressure is employed to speed up the opening motion of the differential piston.
  • Another object of the invention is to provide an improved circuit interrupter of the type utilizing an enclosed, heavy gas, such as sulfur hexafluoride (SP in which gas flow toward the arc is assisted by utilization of the arcing pressure, so that additional external driving force exerted on the gas-moving piston is rendered unnecessary.
  • an enclosed, heavy gas such as sulfur hexafluoride (SP in which gas flow toward the arc is assisted by utilization of the arcing pressure, so that additional external driving force exerted on the gas-moving piston is rendered unnecessary.
  • Still a further object of the present invention is to provide an improved gas-flow circuit interrupter employing a differential piston, which is driven, in part, by an auxiliary operating mechanism.
  • Another object of the invention is to provide an improved circuit interrupter employing a tubular movable contact adapted for ventilation for the cooling thereof, in which the apertures opening into the interior of the ventilated, tubular contact are closed off by valve action during the opening operation, by an orifice structure connected by a lost-motion connection with said movable contact.
  • Still a further object of the present invention is to provide a simplified pumped-gas circuit interrupter of relatively few parts, of simple construction, and adaptable for a long, trouble-free operational life.
  • Still a further object of the invention is to provide a completely enclosed, gas-containing, interrupting structure utilizing a piston for gas flow against the established arc, in which differential piston action is employed to assist the driving force exerted on the gas-flow piston especially during high-current interruption, when otherwise considerable back pressure, exerted upon the piston, would be encountered.
  • the reference ntuneral 1 generally designates a pumped-gas circuit interrupter including a pair of upstanding, cylindrical casing members 2, 3 formed of insulating material of the requisite strength and clamped by annular support rings 4, to an iutermediately disposed contact support plate 6.
  • a tubular movable contact 7 is guided through an opening 8 provided in the contact support plate 6, and makes abutting contact, as shown in Fig. 1, with a resiliently mounted, relatively stationary contact 9 in a substantially enclosed arcing chamber.
  • the stationary rod contact 9 is supported, in depending fashion, from a bracket housing 10, a contact compression spring 11 being interposed between the lower surface of the bracket housing 10 and a shoulder 12 formed along the stationary rod contact 9.
  • the upper extremity of the relatively stationary contact 9 is reduced, and threaded, for the accommodation of a nut 13, which serves to clamp an apertured flexible connector 14 to the upper end of the stationary contact 9.
  • the other ends of the flexible connector 14 are secured by machine screws 15 to the side walls 16 of the bracket housing 10.
  • the bracket housing 10 is integrally cast with a top cover casting 17.
  • the top cover casting 17 is secured by machine screws 18 to a ring-shaped contact plate 19, the latter having a laterally jutting terminal pad 20.
  • the terminal pad 20 may be apertured for the reception of bolts connecting a line conductor fixedly in place.
  • gaskets 22, 23 may be associated with the cover casting 17 and the ring-shaped contact plate 19. Additional gaskets 24, 25 may be employed between the abutting surfaces of the insulating cylindrical casings 2, 3 and the intermediately disposed contact support plate casting 6. An additional gasket 26 may likewise be utilized, being disposed between the lower end of the lower cylindrical casing 3 and a metallic support casting 27, which serves to support the entire interrupting structure.
  • a relatively heavy gas such as sulfur hexafiuoride (SP) is utilized within the interior 21 of the interrupter 1.
  • sulfur hexafiuoride is indicated as a preferred gas, other gases may be employed, or even air.
  • gases may be employed either at atmospheric pressre within the interrupter 1, or at lower, or higher pressures than atmospheric, as deemed desirable in View of the interrupting applications to be encountered.
  • the tubular movable contact 7 has its lower end bored and threaded, as at 28, to accommodate the stud portion 29 of a rod-end 30, the latter being threadedly secured to the upper extremity of an insulating operating rod 31.
  • Another rod-end 32 is threadedly secured to the lower end of the insulating operating rod 31.
  • the rod-end 32 is pivotally connected, as at 33, to a floating guide link 34, the latter having rollers 35 associated with its other end adapted to move laterally in a guide slot 36, formed in the base casting 27.
  • crank-arm 38 Pivotally connected intermediate the ends of the floating guide link 34, as at 37, is an actuating crank-arm 38, the other end of which is keyed to a laterally extending drive shaft 39'.
  • the drive shaft 39 projects through the side of the base casting 27 by means of -a gas-tight seal, not shown, and has secured to the outer, external end thereof an external crank-arm 40.
  • the other end of the crank-arm 40 is pivotally connected, as at 41, to an operating link 42, the latter being actuated by any suitable operating mechanism, forming no part of the present invention.
  • a conducting contact bracket 43 Threadedly secured into the contact support plate 6, and depending downwardly therefrom, is a conducting contact bracket 43 having a lug 44 formed at the lower end thereof.
  • a plurality of pairs of roller current collectors 45 are mounted through a pair of apertured plates 46.
  • the roller collectors 45 are disposed between the side of the moving contact rod 7 and the vertical side 47 of the contact bracket 43.
  • pairs of contact rollers 45 serve to transmit the current from the movable contact 7 to the contact bracket 43, and through the contact support plate 6 to the other terminal pad 43 of the interrupter 1.
  • the movable contact rod 7 has a ventilating duct or passage 49 provided partially therethrough.
  • the lower end of the ventilating passage 49 communicates through laterally located openings 50 to the region 21 interiorly of the lower casing 3.
  • the upper end of the ventilating passage 49 communicates, by additional openings 51, to the region 52 disposed interiorly of an insulating orifice structure 53, constituting an integral part of a differential piston, generally designated by the reference numeral 54.
  • the upper end of the differential piston 54 includes a relatively large cross-sectional-area surface 55 and a lower smaller cross sectional-area surface 56.
  • the lower smaller cross-sectional area 56 forms a gas-pumping piston, which reciprocates longitudinally within an upstanding insulating pumping cylinder 57, the latter being threadedly connected, as at 58, to a threaded boss portion 59 of the contact support plate 6.
  • the outer peripiiery of the larger cross-sectional-area surface 55 moves, with a relatively tight fit, along the inner Wall 60 of the upper cylindrical insulating casing 2, constituting an operating cylinder, a piston ring 61 preferably being provided.
  • suitable operating mechanism serves to move the operating link 42 to the left, as viewed in Fig. 1.
  • This leftward movement of operating link 42 effects counterclockwise, opening, rotative movement of the interiorly disposed crank-arm 38.
  • This action causes floating link 34 to drive insulating operating rod 31 downwardly in a straight line, resulting from the aforesaid straight-line linkage.
  • the downward opening movement of insulating operating rod 31, in turn, drives movable contact 7 and upper head portion 62 thereof downwardly.
  • the operating link 42 is moved toward the right, as viewed in Fig. 1.
  • the operating rod 31 is raised, and the movable contact 7 i forced upwardly into engagement with the relatively stationary contact '9, the compression spring 11 providing the desired contact pressure.
  • the orifice structure 53 and the difierential piston 54 are carried upwardly with the movable contact 7 by the shoulder 66 thereon.
  • a check valve 70 may be employed in the differential piston 54 to provide for entrance of gas behind piston 55 when operating at no load or light currents.
  • the lost-motion 63 seals passage 49 through movable contact 7 during the opening stroke.
  • check valve 70 closes, but excess pressure above the piston 55 can vent through contact 7, since passage 49 will be open during the closing stroke.
  • the present invention overcomes the above objections since it is concerned with a simple pump-type breaker, particularly suitable for indoor service, which, for example, would normally be expected to interrupt only 5,000 to 10,000 amperes.
  • a simple pump-type breaker particularly suitable for indoor service, which, for example, would normally be expected to interrupt only 5,000 to 10,000 amperes.
  • Total enclosure is suitable for use in contaminated or explosive atmospheres.
  • the ventilating duct 49 extending through the hollow, moving contact 7 increases the continuous current-carrying capacity in the closed position of the interrupter 1.
  • the lost-motion 63 provided enables the picking up of the orifice piston 56 and consequent sealing ofi this interior passage 49 during the pumping cycle of the interrupter.
  • an improved pumped-gas circuit interrupter particularly adapted for interrupting relatively heavy currents without the necessity of utilizing heavy external driving springs.
  • the employment of the differential piston 54 enables the arcing pressure to be used, to assist the external operating mechanism in forcing the piston 56 and the movable contact 7 in the opening direction.
  • relatively high back-pressure forces on the piston 56 during heavy-current interruption are easily overcome, and the external operating mechanisms may consequently be relatively light.
  • the use of gas within the interrupter 1 insures the complete closing of the interrupter, even though some pressure may be gnerated during pre-striking during the closing stroke, whereas in the case of liquid-type breakers, such pre-striking during the closing stroke, generating pressure, might prevent the moving contact 7, and the piston structure 54, from moving to the completely closed-circuit position.
  • a pumped-gas circuit interrupter of means defining a substantially enclosed arcing chamber, a pair of separable contacts one of which is movable which are separable to establish an arc within said substantially enclosed arcing chamber, a relatively stationary pumping cylinder, a differential piston having a relatively large cross-sectional position area exposed to the pressure within said arcing chamber and a relatively small cross-sectional piston area movable within said relatively stationary pumping cylinder, said differential piston also having an orifice portion interconnecting the two piston areas of different cross-sectional area, a ven tilating passage extending through the movable contact, a lost-motion connection between the movable contact and said differential piston, the movable contact carrying the differential piston therewith following the take-up of the lost motion, and the take-up of the lost-motion sealing off the ventilating passage through the movable contact.
  • a pumped-gas circuit interrupter including an insulating hollow cylindrical casing, a closure cap structure closing one open end of said cylindrical casing and supporting a relatively stationary contact therein, a contact support plate disposed adjacent the other open end of said cylindrical casing, line-terminal means associated with said closure-cap structure and electrically connected to the relatively stationary contact, means defining an open-ended operating pump cylinder supported from said contact support plate and having the open end thereof projecting interiorly within said other open end of the cylindrical casing toward the relatively stationary contact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, connecting means electrically connecting the movable contact to said contact support plate, second line-terminal means associated with said contact support plate, said differential pumping piston having a relatively large surface piston area sliding along the inner surface of the hollow cylindrical casing, said differential pumping piston also having a smaller surface pumping area which is
  • a pumped-gas circuit interrupter including an insulating hollow cylindrical casing, a closure cap structure closing one open end of said cylindrical casing and supporting a relatively stationary contact therein, a contact support plate disposed adjacent the other open end of said cylindrical casing, line-terminal means associated with said closure-cap structure and electrically connected to the relatively stationary contact, means defining an openended operating pump cylinder supported from said contact support plate and having the open end thereof projecting interiorly within said other open end of the cylindrical casing toward the relatively stationary contact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, means defining a lost-motion mechanical connection between the relatively movable contact and said differential pumping piston, connecting means electrically connecting the movable contact to said contact support plate, second line-terminal means associated with said contact support plate, said differential pumping piston having a relatively large surface piston area sliding along the inner surface of the
  • a pumped-gas circuit interrupter including an insulating hollow cylindrical casing, the gas within the insulating casing comprising the heavy gas sulfur hexafiuoride, a closure cap structure closing one open end of said cylindrical casing and supporting a relatively stationary contact therein, a contact support plate disposed adjacent the other open end of said cylindrical casing, line-terminal means associated with said closure-cap structure and electrically connected to the relatively stationary contact, means defining an open-ended operating pump cylinder supported from said contact support plate and having the open end thereof projecting interiorly within said other open end of the cylindrical casing toward the relatively stationary contact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, connecting means electrically connecting the movable contact to said contact support plate, second line-terminal means associated with said contact support plate, said diflerential pumping piston having a relatively large surface piston area sliding
  • a pumped-gas circuit interrupter including an insulating hollow cylindrical casing, a closure cap structure closing one open end of said cylindrical casing and supporting a relatively stationary contact therein, a contact support plate disposed adjacent the other open end of said cylindrical casing, line-terminal means associated with said closure-cap structure and electrically connected to the relatively stationary contact, means defining an open-ended operating pump cylinder supported from said contact support plate and having the open end thereof projecting interiorly within said other open end of the cylindrical casing toward the relatively stationary contact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, connecting means electrically connecting the movable contact to said contact support plate, second line-terminal means associated with said contact support plate, said difierential pumping piston having a relatively large surface piston area sliding along the inner surface of the.
  • said differential pumping piston also having a smaller surface pumping area which is smaller in area than the aforesaid large surface piston area and reciprocally operable within said operating pump cylinder, said differential pumping piston also having an orifice portion interconnecting the piston areas of different cross-sectional area, the movable contact ongaging the relatively stationary contact through said orifice portion in the closed-circuit position of the circuit interrupter with the large surface piston area of the differential pumping piston positioned rearwardly of the tip portion of the relatively stationary contact, and the volume of gas between thelarge surface piston area of the differential piston and said closure-cap structure being small to increase the driving effort during the opening operation.
  • a pumped-gas circuit interrupter including an upstanding elongated interrupting structure including a pair of axially-aligned, hollow insulating casings, a contact support plate disposed intermediately of said hollow insulating casings, a closure-cap structure surmounting the upper of the two casings, line-terminal means associated with said closure-cap structure, a relatively stationary contact depending downwardly from said closure-cap structure and projecting downwardly within the upper casing, means defining an open-ended operating pump cylinder supported from said contact support plate and having the open end thereof projecting upwardly interiorly within the upper casing toward the relatively stationary con-tact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, connecting means electrically connecting the movable contact to said contact support plate, second line-terminal means associated with said contact support plate, said diflerential pumping piston having
  • said differential pumping piston also having an orifice portion interconnecting the piston areas of difierent cross-sectional area, the movable contact engaging the relatively stationary contact through said orifice portion in the closed-circuit position of the circuit interrupter with the large surface piston area of the differential pumping piston positioned upwardly of the tip portion of the relatively stationary contact, the volume of gas between the large surface piston area of the differential piston and said closure-cap structure being small to increase the driving efiort during the opening operation, and an insulating operating rod connected to the movable contact and extending downwardly through the lower insulating casing to ground potential.
  • a pumped-gas circuit interrupter including an upstanding elongated interrupting structure including a pair of axially-aligned, hollow insulating casings, a contact support plate disposed intermediat'ely of said hollow insulating casings, a closure-cap structure surmounting the upper of the two casings, line-terminal means associated with said closure-cap structure, a relatively stationary contact depending downwardly from said closure-cap structure and projecting downwardly within the upper casing, means defining an open-ended operating pump cylinder supported from said contact support plate and having the open end thereof projecting upwardly interiorly within the upper casing toward the relatively stationary contact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, means providing a lost-motion mechanical connection between the relatively movable contact and said differential pumping piston, connecting means electrically connecting the movable contact to said contact support plate
  • a pumped-gas circuit interrupter including an upstanding elongated interrupting structure including a pair of axially-aligned, hollow insulating casings, the gas within the upstanding interrupting structure comprising the heavy gas sulfur hexafluoride, a contact support plate disposed intermediately of said hollow insulating casings, a closure-cap structure surmounting the upper of the two casings, line-terminal means associated with said closure-cap structure, a relatively stationary contact depending downwardly from said closure-cap structure and projecting downwardly within the upper casing, means defining an open-ended operating pump cylinder supported from said contact support plate and havingthe open end thereof projecting upwardly interiorly within the upper casing toward the relatively stationary contact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, connecting means electrically connecting the movable contact to said contact support plate, second line-
  • a pumped-gas circuit interrupter including an upstanding elongated interrupting structure including a pair of axially-aligned, hollow insulating casings, a contact support plate disposed intermediately of said hollow insulating casings, a closure-cap structure surmounting the upper of the two casings, line-terminal means associated with said closure-cap structure, a relatively stationary contact depending downwardly from said closure-cap structure and projecting downwardly within the upper casing, means defining an open-ended operating pump cylinder supported from said contact support plate and having the open end thereof projecting upwardly interiorly within the upper casing toward the relatively stationary contact, said operating pump cylinder having a closed end immediately adjacent the contact support plate with a contact opening therein, a movable contact carrying a differential pumping piston and reciprocally movable through the contact opening in the closed end of the pump cylinder, connecting means including contact roller guide means depending from said contact support plate and assisting in obtaining reciprocal motion of the movable contact for electrically connecting the movable contact to said contact support plate

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US719892A 1958-03-07 1958-03-07 Pumped-gas circuit interrupter Expired - Lifetime US2957063A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US719892A US2957063A (en) 1958-03-07 1958-03-07 Pumped-gas circuit interrupter
DEW25108A DE1130028B (de) 1958-03-07 1959-02-25 Kompressionsschalter
GB7513/59A GB858791A (en) 1958-03-07 1959-03-04 Improvements in or relating to gas blast electric circuit interrupters
CH7041559A CH368535A (de) 1958-03-07 1959-03-05 Leistungsschalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US719892A US2957063A (en) 1958-03-07 1958-03-07 Pumped-gas circuit interrupter

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US2957063A true US2957063A (en) 1960-10-18

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US719892A Expired - Lifetime US2957063A (en) 1958-03-07 1958-03-07 Pumped-gas circuit interrupter

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US (1) US2957063A (de)
CH (1) CH368535A (de)
DE (1) DE1130028B (de)
GB (1) GB858791A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3218420A (en) * 1961-10-04 1965-11-16 Asea Ab Arc-extinguishing circuit breaker with enclosed gas space
US3679851A (en) * 1969-06-23 1972-07-25 Magrini Fab Riun Scarpa Autoextinguishing interrupters
US3733452A (en) * 1970-02-16 1973-05-15 Merlin Gerin Pressure equalization means between compartments in a puffer circuit interrupter
US3786215A (en) * 1970-12-01 1974-01-15 Bbc Brown Boveri & Cie Electrical compression switch
FR2349205A1 (fr) * 1976-04-22 1977-11-18 Bbc Brown Boveri & Cie Procede pour assister la commande d'au moins un element mobile d'un disjoncteur electrique a compression et dispositif pour la mise en oeuvre de ce procede
US4242550A (en) * 1977-06-27 1980-12-30 Mitsubishi Denki Kabushiki Kaisha Circuit interrupter of the type producing a puff of arc extinguishing gas upon occurrence of an arc
FR2641409A1 (fr) * 1989-01-02 1990-07-06 Alsthom Gec Disjoncteur a haute et moyenne tension a gaz de soufflage
FR2646013A1 (fr) * 1989-04-17 1990-10-19 Alsthom Gec Disjoncteur a moyenne tension a gaz de soufflage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1210473B (de) * 1961-07-20 1966-02-10 Westinghouse Electric Corp Leistungsschalter
DE2909270C2 (de) * 1979-03-09 1985-07-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Autopneumatischer Druckgasschalter
DE3065575D1 (en) * 1980-03-10 1983-12-22 Sprecher & Schuh Ag Gas-blast circuit breaker
CH654138A5 (de) * 1981-06-30 1986-01-31 Sprecher & Schuh Ag Hochspannungs-leistungsschalter.

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FR696259A (fr) * 1929-09-11 1930-12-29 Alsthom Cgee Perfectionnement apporté aux interrupteurs électriques fonctionnant dans un gaz
US1936492A (en) * 1930-03-10 1933-11-21 Whitehead George Ethelbert Circuit breaker
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
GB502443A (en) * 1937-04-16 1939-03-17 Asea Ab Electric circuit breaker having arc-extinguishing arrangements
DE697904C (de) * 1938-01-10 1940-10-29 Aeg Elektrischer Hochspannungsschalter mit Lichtbogenloeschung in einer geschlossenen Huelle
US2246171A (en) * 1938-01-10 1941-06-17 Gen Electric Method of and apparatus for interrupting electric arcs
US2442010A (en) * 1943-12-24 1948-05-25 Westinghouse Electric Corp Circuit interrupter
US2459599A (en) * 1944-09-20 1949-01-18 Westinghouse Electric Corp Circuit interrupter
US2572406A (en) * 1948-09-02 1951-10-23 Stulz Charles High-voltage oil circuit breaker
US2666118A (en) * 1950-06-29 1954-01-12 Westinghouse Electric Corp Circuit interrupter
US2757261A (en) * 1951-07-19 1956-07-31 Westinghouse Electric Corp Circuit interrupters
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches

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DE651169C (de) * 1934-07-20 1937-10-08 Studiengesellschaft Fuer Hochl Fluessigkeitsschalter, bei dem ein vom beweglichen Kontakt angetriebener Pumpenkolben innerhalb einer Loeschkammer eine Fluessigkeitsstroemung hervorruft
DE637075C (de) * 1934-10-06 1936-10-21 Studiengesellschaft Fuer Hochl OElschalter mit kleiner OElmenge fuer hohe Leistung
DE655479C (de) * 1935-04-14 1938-01-17 Studiengesellschaft Fuer Hochl Loeschkammerschalter mit ventilgesteuerter Auslassoeffnung
DE679232C (de) * 1937-09-01 1939-08-01 Studiengesellschaft Fuer Hochl Druckluftschalter
DE675370C (de) * 1938-05-24 1939-05-06 Studiengesellschaft Fuer Hochl Druckgasschalter mit Differentialkolben
DE710178C (de) * 1940-05-04 1941-09-05 Studiengesellschaft Fuer Hochl Druckgasschalter mit einem im Schaltergehaeuse eingebauten Differentialpumpkolben

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR696259A (fr) * 1929-09-11 1930-12-29 Alsthom Cgee Perfectionnement apporté aux interrupteurs électriques fonctionnant dans un gaz
US1936492A (en) * 1930-03-10 1933-11-21 Whitehead George Ethelbert Circuit breaker
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
GB502443A (en) * 1937-04-16 1939-03-17 Asea Ab Electric circuit breaker having arc-extinguishing arrangements
DE697904C (de) * 1938-01-10 1940-10-29 Aeg Elektrischer Hochspannungsschalter mit Lichtbogenloeschung in einer geschlossenen Huelle
US2246171A (en) * 1938-01-10 1941-06-17 Gen Electric Method of and apparatus for interrupting electric arcs
US2442010A (en) * 1943-12-24 1948-05-25 Westinghouse Electric Corp Circuit interrupter
US2459599A (en) * 1944-09-20 1949-01-18 Westinghouse Electric Corp Circuit interrupter
US2572406A (en) * 1948-09-02 1951-10-23 Stulz Charles High-voltage oil circuit breaker
US2666118A (en) * 1950-06-29 1954-01-12 Westinghouse Electric Corp Circuit interrupter
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US2757261A (en) * 1951-07-19 1956-07-31 Westinghouse Electric Corp Circuit interrupters

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3218420A (en) * 1961-10-04 1965-11-16 Asea Ab Arc-extinguishing circuit breaker with enclosed gas space
US3679851A (en) * 1969-06-23 1972-07-25 Magrini Fab Riun Scarpa Autoextinguishing interrupters
US3733452A (en) * 1970-02-16 1973-05-15 Merlin Gerin Pressure equalization means between compartments in a puffer circuit interrupter
US3786215A (en) * 1970-12-01 1974-01-15 Bbc Brown Boveri & Cie Electrical compression switch
FR2349205A1 (fr) * 1976-04-22 1977-11-18 Bbc Brown Boveri & Cie Procede pour assister la commande d'au moins un element mobile d'un disjoncteur electrique a compression et dispositif pour la mise en oeuvre de ce procede
US4242550A (en) * 1977-06-27 1980-12-30 Mitsubishi Denki Kabushiki Kaisha Circuit interrupter of the type producing a puff of arc extinguishing gas upon occurrence of an arc
FR2641409A1 (fr) * 1989-01-02 1990-07-06 Alsthom Gec Disjoncteur a haute et moyenne tension a gaz de soufflage
EP0380907A1 (de) * 1989-01-02 1990-08-08 Gec Alsthom Sa Druckgasschalter für Hoch- und Mittelspannung
US4983789A (en) * 1989-01-02 1991-01-08 Gec Alsthom Sa High- and medium-voltage gas circuit breakers
FR2646013A1 (fr) * 1989-04-17 1990-10-19 Alsthom Gec Disjoncteur a moyenne tension a gaz de soufflage
EP0393458A1 (de) * 1989-04-17 1990-10-24 Gec Alsthom Sa Mittelspannungsblasgasschalter
US4992634A (en) * 1989-04-17 1991-02-12 Gec Alsthom Sa Medium tension gas blast circuit breaker

Also Published As

Publication number Publication date
CH368535A (de) 1963-04-15
GB858791A (en) 1961-01-18
DE1130028B (de) 1962-05-24

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