US3527912A - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

Info

Publication number
US3527912A
US3527912A US693660A US3527912DA US3527912A US 3527912 A US3527912 A US 3527912A US 693660 A US693660 A US 693660A US 3527912D A US3527912D A US 3527912DA US 3527912 A US3527912 A US 3527912A
Authority
US
United States
Prior art keywords
circuit breaker
contact
gas
cylinder
rod
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
US693660A
Other languages
English (en)
Inventor
Jean Jaillet
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Application granted granted Critical
Publication of US3527912A publication Critical patent/US3527912A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—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
    • H01H33/70—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
    • H01H2033/908—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 using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume

Definitions

  • the present invention relates to a puffer type gas blast circuit breaker wherein a blast of gas directed towards the region between the contacts causes the extinction of the arc drawn between separating contacts.
  • Still another object of the invention is to realize a pufer type circuit breaker comprising a safety device preventing dangerous pressure build-up of the compressed gas during the opening movement of the contacts.
  • the foregoing objects are realized through an arrangement wherein the breaker contacts are enclosed within a nozzle-like orifice member which moves together with the movable contact during the opening movement thereof, whereby the exhaust opening is closed by a valve member movable together with the orifice member only for a limited extent of the travel thereof whereupon the valve member opens thereby initiating the flow of the compressed gas after the contacts have moved apart a certain extent.
  • the device in accordance with the present invention makes it possible to obtain blast pressures which are comparable to those of compressed gas circuit breakers without requiring a separate source of compressed gas. It can furthermore easily be applied to any type of break-arcblast circuit breaker and in particular to hermetic cartridge circuit breakers, or circuit breakers having a closed casing lled with gas, such as sulfur hexafiuoride.
  • gas such as sulfur hexafiuoride
  • FIG. 1 is an axial section through a circuit breaker in accordance with the invention representing the apparatus in closed position;
  • FIG. 2 is a similar view showing the position of the parts just before the opening of the blast plug
  • FIG. 3 shows the circuit breaker in open position.
  • An insulating enclosure or arc extinction chamber is formed by cylinder 10i, one of the ends 11 of which is traversed by a sliding control rod 12 which is rigidly connected to a moving contact 13 which cooperates with a semi-fixed contact 14.
  • the moving contact 13 is surrounded by a nozzle shaped orifice member 1S of insulating material or for instance of graphite, at one end of which there is positioned a piston 16 which slides in the cylinder 10
  • the piston 16 whose periphery slides on the inner wall of the cylinder 10 is provided with apertures 17 which place the interior of the orifice member 15 in communication with the lower part of the cylinder 10 which in turn communicates with the exterior of the cylinder through openings closed by one-way flaps 18 which permit fluid flow into the cylinder but not discharge outwardly therefrom.
  • a iiuid seal such as lip seal means 19 is provided between the rod 12 and the cylinder end wall. Said means 19 could, for example, be an elastic material and could be a part of the same member which comprises the flaps 18.
  • At end of rod 12 externally of cylinder 10 is electrically connected to a stationary terminal 21 through a linkage system 20, said rod 12 being reciprocally actuated by a not shown control device.
  • the blast nozzle 15 which constitutes an arc extinguishing chamber can be of any customary shape but it is advantageous for it to include a convergent-divergent section having a throat 22 positioned downstream of the end of the movable contact 13 whereby the two contacts are on opposite sides of the throat 22 after said contacts separate from each other.
  • the end of orifice member 15 opposite to puffer piston 16 includes a seat for a valve or closure member 23 which, when seated, seals the interior of orifice member 15 from the portion of cylinder 10 above piston 16.
  • Valve member 23 is axially guided by rod 24 which may conveniently serve as a conductor from contact 14 to externally of the cylinder.
  • a compression spring 25 positioned between the valve member 23 and a xed part of the cylinder 10 serves to bias the valve member 23 into seated position relative to the orifice member 15, said valve member 23 being axially slidable along the length of guiding rod 24.
  • the downward stroke of member 23, however, is limited by any convenient means such as, for example, a shoulder 26 along the extent of rod 24.
  • the semi-stationary contact 14 is connected in suitable fashion, for instance by a conductor 27 and a lead-through member 28, to the opposite terminal 29 of the circuit breaker, the conductor 27 being flexible in the case of a contact of semi-stationary type.
  • the rod 24 bearing the semi-stationary contact 14 slides in a support 24' spaced from and borne by the end of the cylinder 10, its stroke in the direction of the moving contact 13 being limited by a shoulder on the rod 24 which strikes against the support 24'.
  • a compression spring 27 which rests for instance against said shoulder and is inserted between said shoulder and the end of the cylinder urges the rod 24 and the semi-stationary contact 14 towards the moving contact 13 in such a manner that said semi-stationary contact 14 follows the movement of the moving contact 13 at the start of the opening stroke until the shoulder of the rod 24 strikes against the support 24.
  • the portion of cylinder 10 above piston 16 communicates to exteriorly of the cylinder through apertures 30.
  • valve 23 or orifice member 15 are made of materials which themselves liberate gas during the occurrence of the arc, this gas liberation further enhances the increasing of pressure within the lower portion of cylinder 10.
  • closure member 23 separates from orifice member 15, is determined by the force of the spring 25.
  • This pressure may be very substantial and reach values comparable to those existing in compressedair circuit breakers.
  • the opening of the member 23 is caused by the member 23 coming against the shoulder 26 of the rod 24 (see FIG. 2) whereby member 23 is axially stopped although tone member 15 continues its downward travel.
  • the closure member 23 opens at a particular point in the downward travel of the contact 13 regardless of whatever may be the level ⁇ of pressure in the lower portion of cylinder 10.
  • the spring 25 constitutes a safety device which permits the opening of the plug 23 in case of accidental excessive pressure in the lower portion of the cylinder 10.
  • the device in accordance with the invention can be applied with the same advantages inter alia to hermetic enclosure circuit breakers. It is then merely necessary to provide a communication, having a nonreturn valve, between the upper part and the lower part of the said cylinder to replace the orifices 17, the orifices 18 and 30 remaining closed.
  • the blast fluid can be any suitable fluid and in particular an electronegative gas such as sulfur hexauoride.
  • a pufier type circuit breaker comprising separable contact means to drawn an arc, a movable elongated orifice member having openings at opposite ends thereof, said contact means being positioned Within said orifice member, puffer means to compress a gas in a pufer cylinder in response to the separation movement of said contact means, the interior of said orifice member being in communication with the interior of said puffer cylinder whereby compressed gas is fed from the latter to the former along a fluid flow path from said putter means and along the arc gap created ybetween said contact means, when the latter are in separated position, a closure means normally blocking said path but being sensitive to pressure conditions in said ori-tice member to unblock said path automatically pursuant to the pressure in said orifice member reaching a predetermined magnitude after drawing of said arc.
  • circuit breaker of claim 3 including stop means to limit the extent of axial displacement of said closure member in following said orifice member.
  • said contact means comprising a second Contact being axially movable to a limited extent together with said first contact in the direction ywhich corresponds to said first contact moving away from said second contact.
  • circuit breaker of claim 2 said orifice member having a convergent-divergent section in the direction of said fiow path, said contact means being positioned within said orifice member whereby upon separation of one from the other they are respectively positioned on opposite sides of the throat of the convergent-divergent section.
  • circuit breaker of claim 4 including an elongate guide member axially reciprocable along the axial direction of displacement of said first contact, said second contact being integrally movable with said guide member, means to restrict the axial displacement of said guide member, said closure member being slidably mounted on said guide member for axial displacement relative thereto, said resiliently yieldable means urging said closure member in one axial direction along said guide member, and including means to restrict the axial displacement of said closure member along said guide member.
  • a putter type circuit breaker comprising an axially movable elongated orifice member, separable contact means to draw an arc in said orifice member, puffer means to compress an arc extinction gas in response to said axial movement of said suddenly member during the separation movement of said contact means, an axially movable closure member cooperating in sealing relation with one end of said orifice member, resiliently yieldable means urging said closure ⁇ member into sealing engagement with said end, guide means for said closure member adapted to cause said closure member to follow in sealing engagement the axial movement of said orifice member during the beginning of said separation movement under the action of said resiliently yieldable means, and means to limit the extent of said axial movement of said closure member in following said orifice member so as to unseal said orifice member to force a blast of said gas compressed by said puler means through saidêt member and against said arc.
  • said guide means include stop means to limit the extent of axial movement of said closure member in following said2,000 member.
  • said contact means comprising a first contact movable with said oriiice member and a second contact secured to said conducting rod.
  • circuit breaker of Claim 11 comprising support means for said conducting rod permitting a small axial movement of said conducting rod under the action of spring means.

Landscapes

  • Circuit Breakers (AREA)
US693660A 1967-01-09 1967-12-26 Gas blast circuit breaker Expired - Lifetime US3527912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR90467A FR1516913A (fr) 1967-01-09 1967-01-09 Interrupteur à auto-soufflage

Publications (1)

Publication Number Publication Date
US3527912A true US3527912A (en) 1970-09-08

Family

ID=8623582

Family Applications (1)

Application Number Title Priority Date Filing Date
US693660A Expired - Lifetime US3527912A (en) 1967-01-09 1967-12-26 Gas blast circuit breaker

Country Status (4)

Country Link
US (1) US3527912A (ko)
DE (1) DE1665182A1 (ko)
FR (1) FR1516913A (ko)
NL (1) NL34485C (ko)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639712A (en) * 1969-08-12 1972-02-01 Merlin Gerin Gas blast circuit interrupter having conducting orifice means
US3733452A (en) * 1970-02-16 1973-05-15 Merlin Gerin Pressure equalization means between compartments in a puffer circuit interrupter
US3769479A (en) * 1972-04-28 1973-10-30 Westinghouse Electric Corp Puffer-type compressed-gas circuit interrupter with double-flow action
US3786215A (en) * 1970-12-01 1974-01-15 Bbc Brown Boveri & Cie Electrical compression switch
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker
US3839613A (en) * 1972-06-12 1974-10-01 Hitachi Ltd Puffer type circuit breaker
US3947650A (en) * 1974-01-09 1976-03-30 International Telephone And Telegraph Corporation Gas-insulated switch for an underground power distrubution system
US4000387A (en) * 1974-05-13 1976-12-28 Westinghouse Electric Corporation Puffer-type gas circuit-interrupter
US4090051A (en) * 1974-05-14 1978-05-16 Westinghouse Electric Corp. Energy-storage operating mechanisms for circuit-interrupting structures alone and also for circuit-interrupting structures utilizing serially-related disconnecting-switch structures therewith
US4489226A (en) * 1982-09-03 1984-12-18 Mcgraw-Edison Company Distribution class puffer interrupter
US5059753A (en) * 1987-11-06 1991-10-22 Cooper Industries, Inc. SF6 puffer recloser
US20080078668A1 (en) * 2006-09-29 2008-04-03 Areva T & D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US20080083704A1 (en) * 2006-10-09 2008-04-10 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US20080257866A1 (en) * 2007-04-17 2008-10-23 Tour Areva Circuit breaker with a double acting circuit-breaking chamber and an inverted structure
US20150136739A1 (en) * 2013-11-15 2015-05-21 Hitachi, Ltd. Gas Circuit Breaker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2733551A1 (de) * 1977-07-25 1979-02-08 Siemens Ag Druckgasschalter
FR2692414B1 (fr) * 1992-06-10 1997-04-04 Alsthom Gec Contact pour disjoncteur.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device
US2935575A (en) * 1957-08-20 1960-05-03 Philco Corp Loud-speakers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2111416A (en) * 1935-12-12 1938-03-15 Gen Electric Electric circuit breaker
US2551772A (en) * 1946-05-21 1951-05-08 Forges Ateliers Const Electr High-tension interrupting device
US2935575A (en) * 1957-08-20 1960-05-03 Philco Corp Loud-speakers

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639712A (en) * 1969-08-12 1972-02-01 Merlin Gerin Gas blast circuit interrupter having conducting orifice means
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
US3824360A (en) * 1971-08-06 1974-07-16 Siemens Ag Compressed gas electrical circuit breaker
US3769479A (en) * 1972-04-28 1973-10-30 Westinghouse Electric Corp Puffer-type compressed-gas circuit interrupter with double-flow action
FR2182236A1 (ko) * 1972-04-28 1973-12-07 Westinghouse Electric Corp
US3839613A (en) * 1972-06-12 1974-10-01 Hitachi Ltd Puffer type circuit breaker
US3947650A (en) * 1974-01-09 1976-03-30 International Telephone And Telegraph Corporation Gas-insulated switch for an underground power distrubution system
US4000387A (en) * 1974-05-13 1976-12-28 Westinghouse Electric Corporation Puffer-type gas circuit-interrupter
US4110579A (en) * 1974-05-14 1978-08-29 Westinghouse Electric Corp. Improved energy-storage operating mechanisms for circuit-interrupting structures utilizing serially-related disconnecting switch structures therewith
US4090051A (en) * 1974-05-14 1978-05-16 Westinghouse Electric Corp. Energy-storage operating mechanisms for circuit-interrupting structures alone and also for circuit-interrupting structures utilizing serially-related disconnecting-switch structures therewith
US4489226A (en) * 1982-09-03 1984-12-18 Mcgraw-Edison Company Distribution class puffer interrupter
US5059753A (en) * 1987-11-06 1991-10-22 Cooper Industries, Inc. SF6 puffer recloser
US20080078668A1 (en) * 2006-09-29 2008-04-03 Areva T & D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US7777149B2 (en) 2006-09-29 2010-08-17 Areva T&D Sa Actuating the oppositely-moving contacts of an interrupting chamber by a cylindrical cam
US20080083704A1 (en) * 2006-10-09 2008-04-10 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US7642480B2 (en) * 2006-10-09 2010-01-05 Areva T&D Sa Actuating the contacts of an interrupting chamber in opposite directions via an insulating tube
US20080257866A1 (en) * 2007-04-17 2008-10-23 Tour Areva Circuit breaker with a double acting circuit-breaking chamber and an inverted structure
US8013268B2 (en) * 2007-04-17 2011-09-06 Areva T&D Sa Circuit breaker with a double acting circuit-breaking chamber and an inverted structure
US20150136739A1 (en) * 2013-11-15 2015-05-21 Hitachi, Ltd. Gas Circuit Breaker
US9640349B2 (en) * 2013-11-15 2017-05-02 Hitachi, Ltd. Gas circuit breaker

Also Published As

Publication number Publication date
DE1665182A1 (de) 1970-10-08
NL34485C (ko)
FR1516913A (fr) 1968-02-05

Similar Documents

Publication Publication Date Title
US3527912A (en) Gas blast circuit breaker
US4139752A (en) Gas-type circuit-breaker
US3639712A (en) Gas blast circuit interrupter having conducting orifice means
US2158846A (en) Electric circuit breaker
JP2571779B2 (ja) 圧縮誘電ガスブレ−カ−
GB1495444A (en) Electrical circuit breakers
US4046978A (en) Contact structure for puffer-type gas-blast circuit interrupter
US2803724A (en) Operating device for air blast circuit breakers
US2367934A (en) Fluid blast circuit breaker
JPS59228328A (ja) 圧縮ガスしや断器
US3733452A (en) Pressure equalization means between compartments in a puffer circuit interrupter
US3218421A (en) Gas blast circuit breaker having actuating means responsive to differential pressure
JP2837188B2 (ja) 送風に使用される誘電性ガス式高圧遮断器
JPH065167A (ja) 吹付け型の中電圧又は高電圧遮断器
US1814847A (en) Circuit interrupting device
AU687947B2 (en) A puffer circuit-breaker having a pneumatically-locked semi-moving piston
US2919329A (en) Air blast circuit breakers
GB578422A (en) Improvements in or relating to fluid blast electric circuit interrupters
US3674956A (en) Puffer type circuit interrupter
US4440997A (en) Puffer interrupter with arc energy assist
US2775670A (en) Combined air puffer air buffer for circuit breakers
US3334207A (en) Gas blast circuit-breaker with stationary spaced tubular contacts and piston actuated contact bridge including blast valve actuated thereby
US4079218A (en) Puffer interrupter with piston bypass channel
GB1509073A (en) Puffer-type gas circuit-interrupter
GB1519347A (en) Dual compression puffer interrupter