US3839613A - Puffer type circuit breaker - Google Patents

Puffer type circuit breaker Download PDF

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Publication number
US3839613A
US3839613A US00366144A US36614473A US3839613A US 3839613 A US3839613 A US 3839613A US 00366144 A US00366144 A US 00366144A US 36614473 A US36614473 A US 36614473A US 3839613 A US3839613 A US 3839613A
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United States
Prior art keywords
contactor
arc
fixed
puffer
movable
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Expired - Lifetime
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US00366144A
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English (en)
Inventor
T Tsubaki
M Sato
S Nakano
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Hitachi Ltd
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Hitachi Ltd
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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
    • H01H33/91—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

Definitions

  • a puffer type circuit breaker comprises a contactor device including at least one set of a fixed contactor and a hollow movable contactor provided in a pressure container in which an arc-extinguishing gas of unitary pressure is filed, the contactors being separable relatively from each other, a puffer device for compressing the arc-extinguishing gas in conjunction with a breaking operation, an insulating nozzle formed with an orifice portion surrounding the outer diameter portions of the fixed contactor for driving the arcextinguishing gas compressed to a high pressure by the puffer device at an arc produced between the contactors, and valve mechanisms provided on the side of the fixed contact and on the side of the movable con tactor, respectively, the mechanisms blocking the arcextinguishing gas until the movable contactor is separated a predetennined distance away from the fixed contactor and thereafter being substantially simultaneously opened. This allows the arc-extingu
  • the present invention relates to a circuit breaker, and more particularly to a puffer typecircuit breaker in which an arc-extinguishing gas is compressed in conjunction with a breaking operation to extinguish an are generated between contactors by blowing the thus obtained high pressure arc-extinguishinggas against the arc.
  • a puffer type circuit breaker is of such a type that an arc-extinguishing gas is compressed in conjunction with a breaking operation to extinguish an are generated be tween contactors by blowing the thus obtained high pressure arc-extinguishing gas thereagainst.
  • an arc extinguishing insulating medium having good extinguishing and insulating properties such as SF (sulfur hexafluoride) gas.
  • circuit breakers have been constructed in such a manner that one contactor is permitted to move a predetermined distance to follow the other contactor at the beginning of the breaking operation or otherwise have been constructed so as to include a wipe structure adapted to slide one contactor relative to the other over a certain distance, thereby opening the contactors for are generation in a state where an increased breaking speed of the movable contactor and hence an increased pressure at a pressuse generating portion have been attained subsequent to the initial breaking operation.
  • the wipe structure could not be made large enough, and in addition, special attention had to be paid to the timing when the high pressure arcextinguishing gas is to be blown and to what extent the movable contactor is moved away from the fixed contactor.
  • the conventional circuit breakers required a great amount of high pressure arcextinguishing gas for effecting the breaking of a high current circuit, thus resulting in increased capacity of the puffer device for compressing the arc-extinguishing gas in order' to generate the high pressure arcextinguishing gas.
  • the driving of the movable contactor and the puffer device serving as a blowing pressure generator required the large driving force with the result of the large-sized devices for use in the circuit breakers such as the external operational device. This brought about the causes of the large-sized and complicated circuit breakers.
  • the thus increased driving force causes an excessive force to be exerted on the operational rod for mechanically connecting the movable contactor and the puffer device each held at high potential to the operational device held at earth potential in electrically isolated manner.
  • difficulty was encountered in manufacturing the insulating operational rod resistant to such a force.
  • An object of the present invention is to provide a puffer type circuit breaker being capable of effecting a breaking operation with high capacity.
  • Another object of the present invention is to provide a puffer type circuit breaker having an improved breaking performance wherein an arc-extinguishing gas is held at the beginning of the breaking operation and is then blown against an arc produced between contactors in a state where the contactors are separated a predetermined distance.
  • a further object of the present invention is to provide a puffer type circuit breaker being capable of effectively extinguishing the arc by improving the configuration of the insulating nozzle for driving the high pressure arc-extinguishing gas to the are produced between the contactors.
  • a still another object of the present invention is to provide a puffer type circuit breaker adapted to efficiently blow the high pressure arc-extinguishing gas generated by the puffer device against the are produced between the contactors by disposing the contactors in the proximity of the puffer device for compressing the arc-extinguishing gas.
  • a puffer type circuit breaker comprises a contactor device including at least one set consisting of a fixed contactor and a hollow movable contactor in a pressure container in which an arc-extinguishing gas of unitary pressure is filled, the contactors being seperable relatively from each other, a puffer device for compressing the arcextinguishing gas in conjunction with a breaking operation, an insulating nozzle formed with an orifice portion surrounding outer diameter portions of the fixed contactor for driving the arc-extinguishing gas compressed to a high pressure by the puffer device at an are produced between the contactors, and valve mechanisms provided on the side of the fixed contact and on the side of the movable contactor, respectively, the mechanisms blocking the arc-extinguishing gas until the movable contactor is seperated a predetermined distance away from the fixed contactor and thereafter being substantially simultaneously opened.
  • FIG. 1 is a longitudinal cross-section of a puffer type circuit breaker according to the present invention, showing a closed state.
  • FIG. 2 is a longitudinal cross-section of the puffer type circuit breaker of FIG. 1, but showing an opening $1316. 1
  • FIG. 3 is a longitudinal cross-section of another embodiment of a puffer type circuit breaker according to the present invention, showing a closed state.
  • FIG. 4 is a longitudinal cross-section of the puffer type circuit breaker of FIG. 3, but showing an opening state.
  • FIG. 5 is a longitudinal cross-section of still another embodiment of a puffer type circuit breaker according to the present invention.
  • FIGS. 1 to 2 show a puffer type circuit breaker according to the present invention, its closed state and opening state being shown in FIGS. 1 and 2, respective]
  • a fixed member 11 on which a main fixed contactor 12 and a fixed arc contactor 13 are mounted.
  • the main fixed contactor 12 is provided with a plurality of slits 12a thereon except for the upper end portion thereof and with spring means 14 at its tip end portion.
  • the outer circumferencial portion of the spring means 14 is provided with a shield 15 for limiting an electric field.
  • a guide rod 16 for guiding the fixed arc contactor 13 therealong and on the tip end portion thereof there is provided a slit 13a adapted to undergo a slight deformation relative to a force inwardly radially exerted thereon.
  • a puffer device comprising a puffer cylinder 17 and a puffer piston 18.
  • An insulating nozzle support on which a base portion of an insulating nozzle 19 is mounted is disposed on the upper surface of the puffer cylinder 17 on the side of the contactor and secured thereto by means of a bolt 21.
  • an orifice portion 190 to define a valve mechanism between the insulating nozzle 19 and an outer diameter portion of the fixed arc contactor 13.
  • the tip end portion 19b of the insulating nozzle 19 is formed in tapered configuration.
  • An inner diameter end portion of the insulating nozzle support 20 is provided with a movable arc contactor 22 formed with a hollow construction and the outer diameter end portion thereof is configured so as to define a main movable contactor 23.
  • a puffer chamber 24 defined by the puffer cylinder 17 and the puffer piston 18 there is introduced the arcextinguishing gas, which is blown against the are produced between the arc contactors l3 and 22 through an intake port 25 provided at the wall of the puffer cylinder 17 on the side of the contactor.
  • the inner circumferencial surface of the insulating nozzle 19 on the side of the puffer cylinder 17 is disposed in the proximity of the upper surface of the puffer cylinder 17 with a gap required for introducing therein the high pressure arc-extinguishing gas.
  • the gap is preferably configured so as to have substantially the same cross-sectional area as that of the intake port 25.
  • a puffer cylinder shaft 26 having a hollow construction communicating with the hollow portion of the movable arc contactor 22.
  • a plurality of holes 27 are provided on the side wall of the puffer cylinder shaft 26.
  • a support cylinder 28 for supporting the puffer piston 18 is disposed surrounding the puffer cylinder shaft 26 in slidable and gas-tight relation thereto.
  • the support cylinder 28 is provided with a hole 29 for emitting the arcextinguishing gas contained in the puffer cylinder shaft 26 outwardly through the hole 27 of the puffer cylinder shaft 26 when the latter moves a predetermined distance.
  • the support cylinder 28 is fixed to a fixed portion.
  • the puffer cylinder shaft 26 is coupled to an insulating operational rod 30 which is, in turn, interlocked with an exteral operational device (not shown).
  • a current collector 31 is provided surrounding the outer circumferential portion of the puffer cylinder 17. These devices are disposed in a container (not shown) in which the arc-extinguishing insulating gas of unitary pressure such as SP is filled.
  • a current flows through a path extending from the fixed member 11 through the main fixed contactor 12, the main movable contactor 23, the insulating nozzle support 20, and the puffer cylinder 17 to the current collector 31 in the closed condition as shown in FIG. 1.
  • the insulating operational rod 30and the puffer cylinder shaft 26 together with the puffer cylinder 17, the insulating nozzle 19, the main movable contactor 23 and the movable arc contactor 22 are driven downwardly by the external operational device (not shown).
  • the current flows though a different path extending from the fixed member 11 through the fixed arc contactor 13, the movable arc contactor 22 and the puffer cylinder 17 to the current collector 31.
  • a further downward movement of the puffer cylinder shaft 26 causes the breaking of the arc contactors l3 and 22 with the result of the generation of the arc therebetween.
  • the arc-extinguishing gas contained in the puffer chamber 24 defined by the puffer cylinder 17 and the puffer piston 18 is compressed due to the drive of the puffer cylinder 17.
  • the arc-extinguishing gas in the puffer chamber 24 remains compressed only within a space formed by the valve mechanism defined by the orifice 19a of the insulating nozzle 19 and the outer diameter portion of the fixed arc contactor l3 and by the valve mechanism defined by the puffer cylinder shaft 26 and the support cylinder 28, thus generating no gaseous flow of the arc-extinguishing gas.
  • the hole 27 provided on the puffer cylinder shaft 2o coincides with the hole 29 provided on the support cylinder 28 of the puffer piston 18 to effect the simultaneous flow-out of the arc-extinguishing gas compressed to a high pressure through the space between the insulating nozzle 19 and the fixed arc contactor 13 and through the hollow portion of the movable arc contactor 22.
  • the high pressure arc-extinguishing gas is blown from the puffer chamber 24 against the are 32 to extinguish the latter.
  • the inner circumferential surface 19c of the insulating nozzle 19 adjacent to the orifice portion 19a thereof and facing the movable arc contactor 22 is formed substantially perpendicular to the breaking direction between the contactors l3 and 22. This causes the high pressure arc-extinguishing gas to be blown along a direction perpendicular to the breaking direction of the contactors 13 and 22'to the space where the arc is produced, thus permitting a smoothed blowing operation against the orifice portion 190 of the insulating nozzle 19 and the side of the hollow movable arc contactor 22 with a highly efficient arc-extinguishing operation. 4
  • the main contactors l2 and 23 are disposed outside of the insulating nozzle 19 for a current flow of large capacity and only the arc contactors 13 and 22 for cutting off the current are disposed within the insulating nozzle 19. so that the orificeportion 19a of the insulating nozzle 19 can be designed to have a cross-sectional area capable of passing therethrough a predetermined amount of arc-extinguishing gas necessary for extinguishing the are 32. This prevents the arcextinguishing gas from flowing in excess of an amount required for arc extinguishment, this ensuring the flow of the requisite amount of the arc-extinguishing gas without increasing the capacity of the puffer chamber 24.
  • the movable arc contactor 22 is disposed in the proximity of the upper surface of the puffer cylinder 17 on the side of the contactor with the reduced dead space of the flow path extending from the intake port 25 of the puffer cylinder 17 to the are 32 produced between the arc contactors 13 and 22. This allows almost all amounts of the high pressure arc-extinguishing gas generated in the puffer chamber 24 to be efficiently utilized for extinguishing the are 32 with an improvement in breaking performance.
  • the external operational device drives the insulating operaional rod 30 upwardly as viewed in the figure. This causes the up ward drive of the puffer cylinder 17, the insulating nozzle 19, the main movable contactor 23, and the movable arc contactor 22, so that the fixed arc contactor 13 is inserted to the orifice portion 19a of the insulating nozzle 19 with the first closing of the arc contactors 13 and 22 and then with the closing of the main contactors 12 and 23.
  • the movement exceeding a certain stroke causes the closing operation of the valve mechanism defined by the orifice portion 19a of the insulating nozzle 119 and the outer diameter portion of the fixed arc contactor 13 and the valve mechanism formed in the hollow portion of the movable arc contactor 22, and thus provides the puffer piston 18 with a check valve, which is opened at the negative pressure established in the puffer chamber 24 to effect the direct introduction of the arc-extinguishing gas from the outside to the puffer chamber 24.
  • FIGS. 3 and 4 show modified embodiments according to the present invention in a closed state shown in FIG. 3 and in opening state shown in FIG. 4.
  • the elements having the same function as those of FIGS. 1 and 2 are indicated with the same reference numerals with the detailed description omitted for the sake of clarity.
  • a movable contactor is constructed in such a manner that a hollow movable arc contactor 42 is disposed inside of a main movable contactor 41 with the tip end portion of a fixed contactor 43 formed hollow and interposed between the main movable contac tor 41 and the movable arc contactor 42.
  • the hollow portion of the fixed contactor 43 does not communicate with the outside.
  • An arc-proof member is mounted on the tip end portion of the fixed contacto r 43.
  • At the central portion of the insulating nozzle 19 there is provided an orifice portion 19a defining a valve mechanism between the orifice portion 19a and the outer diameter portion of the fixed contactor 43.
  • the insulating nozzle 19 is necessarily made longer by an amount corresponding to an extension of the main movable contactor 41 and the movable arc contactor 42 with the result of the disadyantageously increased dead space by the same amount, but with the simplified construction as compared with that described in connection with the previous embodiment.
  • the operations of the modified embodiment are substantially the same as those of FIGS. 1 and 2. At the beginning of the operation, the arc-extinguishing gas is enclosed in the insulating nozzle 19.
  • the hole 28 provided on the puffer cylinder shaft 26 of the puffer cylinder 17 coincides with the hole 29 provided on the support cylinder 28 of the puffer piston 18 to form the arc-extinguishing gas as a gaseous flow flowing out through the space between the insulating nozzle 19 and the fixed contactor 43 and through the hollow portion of the movable arc contactor 42 for effecting the blowing of the high pressure arcextinguishing gas against the arc 32.
  • This permits excellent arc-extinguishing with a high current cut off.
  • FIG. 5 shows a still further embodiment according to the present invention wherein a fixed contactor 51 is mounted on the fixed member.
  • the fixed contactor 51 is made of hollow construction with a hole 53 provided on the side wall thereof.
  • a puffer device comprising a puffer cylinder 54 and a puffer piston 55.
  • the tip end portion 56a of the insulating nozzle 56 is constructed so as to surround the outer diameter portion of the fixed contactor 51.
  • a main movable contactor 58 On the upper surface of the puffer cylinder 54 there is fixedly mounted a main movable contactor 58 which is constituted of a plurality of small pieces arranged in annular form and which is pressed against the outer diameter portion of the fixed contactor 51 by means of a spring 59.
  • a movable arc contactor 60 At the inside of the main movable contactor 58 there is provided a movable arc contactor 60 which is made of hollow construction and pressed upwardly as viewed in the figure by means of spring means 61 and which is adapted to follow the fixed contactor 51 a certain distance.
  • a cover 62 made of an insulating material for preventing the main movable contactor 58 and the spring 59 from being subjected to damage due to the are produced between the contactors 51 and 60.
  • the arc-extinguishing gas is introduced into a puffer chamber 63 defined by the puffer cylinder 54 and the puffer piston 55.
  • an intake port 64 serving as a flow path for blowing the arcextinguishing gas compressed to a high pressure in the puffer chamber 63 against the are produced between the contactors 51 and 60.
  • a puffer cylinder shaft 65 has a hollow portion communicating with the hollow portion of the movable arc contactor 60 and has a hole 66 provided at the side wall thereof.
  • a support cylinder 67 for supporting the puffer piston 55 is disposed surrounding the puffer cylinder shaft 65 and has a hole 68 provided for drawing out the arc-extinguishing gas within the puffer cylinder shaft 26 when the hole 66 is moved a predetermined distance.
  • the puffer cylinder shaft is coupled to an insulating operational rod 69.
  • a current path is established along a path extending from the fixed member 11 through the fixed contactor 51, the main movable contactor 58, the puffer cylinder 54, the current collector 71 and the puffer piston 55 to the support cylinder 67.
  • the movable arc contac tor 60 is moved a predetermined distance following the fixed contactor 51, and thereafter is seperated from the fixed contactor 51 with the result of the generation of the arc. In this state, the arc-extinguishing gas within the puffer chamber 63 is only compressed in a space defined by the valve mechanism formed on the sides of the fixed contactor and the movable contactor without generating the arc-extinguishing gaseous flow.
  • a further drive causes the hole 53 of the fixed contactor 51 to be drawn out of the tip end portion 56a of the insulating nozzle 56 and the hole 66 of the puffer cylinder shaft 26 to coincides with the hole 68 of the support cylinder 67 whereupon the arc-extinguishing gas compressed to high pressure flows out simultaneously through the hollow portion of the fixed contactor 51 and that of the movable arc contactor 60 to blow against the are through the puffer chamber 24 for are extinguishment.
  • This arrangement permits the breaking operation of a large current.
  • a puffer type circuit breaker comprising a contactor device including at least one set of a fixed contactor and a hollow movable contactor in a pressure container in which an arc-extinguishing gas of unitary pressure is filled, said contactors being separable relatively from each other, a puffer device for compressing said arcextinguishing gas in conjunction with a breaking operation, an insulating nozzle formed with an orifice portion surrounding the outer diameter portion of said fixed contactor for driving the arc-extinguishing gas compressed to a high pressure by said puffer device at an are produced between said contactors, and valve mechanisms provided on the side of said fixed contactor and on the side of said movable contactor, respectively, said mechanisms blocking said arc-extinguishing gas until said movable contactor is separated a predetermined distance away from said fixed contactor and thereafter being substantially simultaneously opened.
  • a puffer type circuit breaker according to claim 1, wherein said valve mechanisms provided on the side of said fixed contactor and on the side of said movable contactor are adapted to open in response to an operational stroke.
  • a puffer type circuit breaker comprises a hole provided at the side wall of a cylindrical operational member having a hollow portion and coupled to a hollow portion of said movable contactor, and a valve member for blocking said hole at the beginning of the breaking operation and for releasing the blocking of said hole after said operational member is moved a predetermined distance.
  • valve member comprises a support member for supporting a fixed portion of said puffer device, said support member having a hollow portion surrounding said operational member.
  • a puffer type circuit breaker according to claim 1, wherein said valve mechanism provided on the side of said fixed contactor is defined by the orifice portion of said insulating nozzle and said fixed contactor inserted into said orifice portion.
  • a puffer type circuit breaker according to claim 1, wherein said fixed contactor is formed hollow and said valve mechanism provided on the side of said fixed contactor is defined by a hole provided at the side wall of said fixed contactor and a portion extending through the orifice portion of said insulating nozzle, said extending portion blocking said hole at the beginning of the breaking operation and releasing the blocking of said hole after said insulating nozzle is moved a predetermined distance.
  • a puffer type circuit breaker according to claim 1, wherein the inner surface of said insulating nozzle on the side of said movable contactor and in the proximity of said orifice portion is formed substantially perpendicular to a first direction along which said fixed contactor and movable contactor are oppositely disposed so that said arc-extinguishing gas may be blown from a second direction perpendicular to said first direction to a space in which the arc develops.
  • said fixed contactor comprises a main fixed contactor disposed outside of said insulating nozzle and a fixed arc contactor defining said valve mechanism upon insertion thereof into the orifice portion of said insulating nozzle and wherein said movable contactor comprises a main movable contactor seperably contacting with said main fixed contactor and a hollow movable arc contactor seperably contacting with said fixed arc contactor.
  • a puffer type circuit breaker according to claim 8, wherein said main movable contactor is formed on the outer circumferencial surface of an insulating nozzle support for fixing said insulating nozzle.
  • a puffer type circuit breaker wherein said movable arc contactor is disposed in the proximity of the upper surface of said puffer device and the inner circumferential surface of said insulating nozzle on the side of said movable arc contactor is disposed in the upper surface on the side of said movable arc contactor with a gap provided therebetween for the flow of the high pressure arc-extinguishing gas.
  • a puffer type circuit breaker wherein said fixed arc contactor is adapted to be inserted to the hollow portion of said hollow movable arc contactor and said fixed arc contactor is provided with means for applying a pressure contact to said movable

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US00366144A 1972-06-12 1973-06-01 Puffer type circuit breaker Expired - Lifetime US3839613A (en)

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Application Number Priority Date Filing Date Title
JP5881572A JPS5612973B2 (pt) 1972-06-12 1972-06-12

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CH (1) CH588154A5 (pt)
FR (1) FR2188285B1 (pt)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909572A (en) * 1973-08-31 1975-09-30 Hitachi Ltd Circuit breaking section of a gas circuit breaker of the puffer type
US3924088A (en) * 1973-10-11 1975-12-02 Sprecher & Schuh Ag Gas-blast power switch for high voltage
US3970811A (en) * 1974-09-16 1976-07-20 I-T-E Imperial Corporation Nozzle and contact arrangement for puffer type interrupter
US4070558A (en) * 1974-10-11 1978-01-24 Reyrolle Parsons Limited High voltage circuit-interrupters
US4101748A (en) * 1976-05-12 1978-07-18 Westinghouse Electric Corp. Modular puffer-type circuit-interrupter unit adaptable for different voltage and current ratings
US4114004A (en) * 1975-10-09 1978-09-12 Delle-Alsthom S.A. Gas-blast electric cut-out device
US4123636A (en) * 1975-12-31 1978-10-31 Westinghouse Electric Corp. Double-flow puffer-type single-pressure compressed-gas circuit-interrupter
US4132876A (en) * 1975-09-22 1979-01-02 Hitachi, Ltd. Puffer type gas circuit breaker
US4139753A (en) * 1976-09-21 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit-interrupter having improved separable contact structure
US4139751A (en) * 1975-09-25 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit interrupter
US4270034A (en) * 1977-03-24 1981-05-26 Mitsubishi Denki Kabushiki Kaisha Puffer type circuit interrupter
US4328403A (en) * 1977-02-15 1982-05-04 Westinghouse Electric Corp. Single barrel puffer circuit interrupter
US4467158A (en) * 1978-10-26 1984-08-21 Tokyo Shibaura Denki Kabushiki Kaisha Puffer type gas circuit
US4736080A (en) * 1986-07-23 1988-04-05 Hydro-Quebec Puffer type liquefied-gas self-injection circuit breaker
US4780581A (en) * 1987-10-30 1988-10-25 Rte Corporation Suicide switch/interrupter with variable volume chamber and puffer action
US5072084A (en) * 1989-11-29 1991-12-10 Hitachi, Ltd. Gas circuit breaker
US5079392A (en) * 1989-06-30 1992-01-07 Hitachi, Ltd. Gas circuit breaker
US5153397A (en) * 1990-03-19 1992-10-06 Hitachi, Ltd. Gas circuit breaker
US5159164A (en) * 1990-01-08 1992-10-27 Hitachi, Ltd. Gas circuit breaker
EP0700062A1 (en) * 1994-09-05 1996-03-06 Asea Brown Boveri Ab High-voltage circuit breaker

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107474A (ja) * 1975-03-19 1976-09-24 Hitachi Ltd Patsufuaashikigasushadanki
JPS52165269U (pt) * 1976-06-10 1977-12-14
FR2444333A1 (fr) * 1978-12-11 1980-07-11 Merlin Gerin Interrupteur a autosoufflage a mise en depression de la chambre de coupure
CH645754A5 (en) * 1979-06-14 1984-10-15 Sprecher & Schuh Ag Gas-blast circuit breaker
DE2946929C2 (de) * 1979-11-21 1985-07-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Autopneumatischer Druckgasschalter
FR2709596B1 (fr) * 1993-08-30 1995-09-29 Gec Alsthom T & D Sa Contact à clapet pour disjoncteur.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US3527912A (en) * 1967-01-09 1970-09-08 Merlin Gerin Gas blast circuit breaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US3527912A (en) * 1967-01-09 1970-09-08 Merlin Gerin Gas blast circuit breaker

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909572A (en) * 1973-08-31 1975-09-30 Hitachi Ltd Circuit breaking section of a gas circuit breaker of the puffer type
US3924088A (en) * 1973-10-11 1975-12-02 Sprecher & Schuh Ag Gas-blast power switch for high voltage
US3970811A (en) * 1974-09-16 1976-07-20 I-T-E Imperial Corporation Nozzle and contact arrangement for puffer type interrupter
US4070558A (en) * 1974-10-11 1978-01-24 Reyrolle Parsons Limited High voltage circuit-interrupters
US4132876A (en) * 1975-09-22 1979-01-02 Hitachi, Ltd. Puffer type gas circuit breaker
US4139751A (en) * 1975-09-25 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit interrupter
US4114004A (en) * 1975-10-09 1978-09-12 Delle-Alsthom S.A. Gas-blast electric cut-out device
US4123636A (en) * 1975-12-31 1978-10-31 Westinghouse Electric Corp. Double-flow puffer-type single-pressure compressed-gas circuit-interrupter
US4101748A (en) * 1976-05-12 1978-07-18 Westinghouse Electric Corp. Modular puffer-type circuit-interrupter unit adaptable for different voltage and current ratings
US4139753A (en) * 1976-09-21 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit-interrupter having improved separable contact structure
US4328403A (en) * 1977-02-15 1982-05-04 Westinghouse Electric Corp. Single barrel puffer circuit interrupter
US4270034A (en) * 1977-03-24 1981-05-26 Mitsubishi Denki Kabushiki Kaisha Puffer type circuit interrupter
US4467158A (en) * 1978-10-26 1984-08-21 Tokyo Shibaura Denki Kabushiki Kaisha Puffer type gas circuit
US4736080A (en) * 1986-07-23 1988-04-05 Hydro-Quebec Puffer type liquefied-gas self-injection circuit breaker
US4780581A (en) * 1987-10-30 1988-10-25 Rte Corporation Suicide switch/interrupter with variable volume chamber and puffer action
US5079392A (en) * 1989-06-30 1992-01-07 Hitachi, Ltd. Gas circuit breaker
US5072084A (en) * 1989-11-29 1991-12-10 Hitachi, Ltd. Gas circuit breaker
US5159164A (en) * 1990-01-08 1992-10-27 Hitachi, Ltd. Gas circuit breaker
US5153397A (en) * 1990-03-19 1992-10-06 Hitachi, Ltd. Gas circuit breaker
EP0700062A1 (en) * 1994-09-05 1996-03-06 Asea Brown Boveri Ab High-voltage circuit breaker

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JPS4916866A (pt) 1974-02-14
DE2329501A1 (de) 1974-01-17
CH588154A5 (pt) 1977-05-31
FR2188285B1 (pt) 1977-09-09
DE2329501B2 (de) 1975-10-09
FR2188285A1 (pt) 1974-01-18
JPS5612973B2 (pt) 1981-03-25

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