US3185802A - Gas blast circuit breakers having at least one tubular contact - Google Patents

Gas blast circuit breakers having at least one tubular contact Download PDF

Info

Publication number
US3185802A
US3185802A US124948A US12494861A US3185802A US 3185802 A US3185802 A US 3185802A US 124948 A US124948 A US 124948A US 12494861 A US12494861 A US 12494861A US 3185802 A US3185802 A US 3185802A
Authority
US
United States
Prior art keywords
contact
members
contact members
gas blast
screen
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
US124948A
Other languages
English (en)
Inventor
Amalric Jean
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
Priority claimed from FR976282A external-priority patent/FR91613E/fr
Application granted granted Critical
Publication of US3185802A publication Critical patent/US3185802A/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
    • H01H33/80—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
    • H01H33/82—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/52—Driving mechanisms, i.e. for transmitting driving force to the contacts with means to ensure stopping at intermediate operative positions
    • 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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
    • 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
    • H01H33/86—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve

Definitions

  • the break-down voltage between the contacts is determined by the testing voltage of the chamber. It 'determines, in its turn, the length of travel of the movable contact or contacts. Since it is necessary to make this length as small as possible, met-a1 screens are usually provided which surround the contacts in opened position and render the electric held between them as uniform as possible. In the closed position of the contacts, these electrodes define an annular space through which the gas blast exhausts at the moment of the separation of the contacts. The thickness of this annular space plays an important part in the exhaust of the gases, and it is necessary to give it a value which assures maximum efficiency in the extinction of the are.
  • FIG. 11 denotes a body of insulating material constituting the wall of the chamber .11 which is connected through the tube 12 with a compressed air reservoir 13.
  • the upper part of the chamber is closed by a cover 14 while the lower part of the chamber is closed by a bell shaped member 15.
  • the piston 17 can be moved in a cylinder 16, the latter being solid with the cover 14.
  • On the cylinder 16 there is mounted a rfixed screen 18.
  • the piston 17 is arranged to entrain the first movable contact 19 at a given moment.
  • the movable contact 19 is hollow and opens into a cavity 33 closed by a valve 34 which can vent it to atmosphere.
  • a sleeve 20 is fixed on the contact 19 and is actuated by,
  • a spring 30 which is supported by the piston 17 and, on the other hand, by the spring 31 which is supported by the cover ⁇ 14.
  • the first movable contact co-operates with a second movable contact 23, also h0llow, which at its lower end carries a valve 25.
  • This valve is actuated by a piston 26 which slides in a cylinder 27 and on which the spring 28 acts.
  • the contact 23 is provided with an exhaust opening 24 near the valve 25.
  • a screen .29 is fixed on the second contact and is similar to the fixed screen v1-8.
  • the valve 25 is controlled by the pneumatic delay device or relay 37, 38, 39 and 40 through a piston 26.
  • the pneumatic valves 42, 43 can put the interior of the chamber 11' in communication with the interior of the cylinder 16 by means of the tubes 44' and 45, or vent the cylinder 16 to atmosphere.
  • the valve 34 is controlled by a pneumatic delay device or relay 46, 47 through a piston 36. All these valves and pneumatic relay devices are controlled through the tube 48 from a control point.
  • the circuit breaking device functions as follows:
  • the latter moves the first contact 19 in the same direction.
  • the interior of the bell shaped member 15 and the space 33 are vented to atmosphere through the aperture 49.
  • the valves 42, 43 have now blocked the tubes 45 and vented to atmosphere the interior of the cylinder '16.
  • the compressed air in the breaker chamber can now act on the piston 17. If we denote the distance between the screens 18 and 29 in the closed position of the chamber by a and the stroke effected by the second contact 23 by b, the piston 17 will act upon the sleeve 20 after having effected a stroke of b plus an additional stroke to compress the spring '30.
  • the distance between the two screens, at the moment of the separation of the contacts and of the initiation of the arc is therefore a-b.
  • the two screens therefore, define at this moment an annular blast space of a thickness a-b through which the compressed air present in the chamber passes into the two hollow contacts, cooling the are under optimum conditions and removing the ionised gases at first respectively into the bell shaped member 15 and the space 33, and then to the atmosphere.
  • the delay devices 37, 38, 39, 40 and 46, 47 whose operation will not be described since it does not form part of the invention, cut off the supply of compressed air coming through the tube 48 and at the same time vent the cylinders 27 and 35 to atmosphere.
  • the piston 26 urged by the spring 28, and in consequence, the second contact 23 return to their initial position. -It is the same as regards the piston 36 and the valve 34 which again close the space 33.
  • the interior of the cylinder 16 is still vented to atmosphereyand this allows the piston 17 to continue its stroke until the contact 19 is within the screen '18.
  • the chamber 11' bei g completely closed by the valve 25 and by the valves 42, 43, pressure is rapidly reestablished.
  • the solution according to the invention enables the travel b and the distance a to be given values which assure :a maximum efiiciency of blowing while the insulating distance can be given the value required by the testing voltage of the chamber.
  • a gas blast circuit breaker comprising in combination two aligned relatively movable elongated contact members, at least one of said contact members being tubular, a pair of screen members defining around said contact members a substantially annular space through which the gas blast exhausts into at least one of said contact members at the moment of their separation, means to bring said screen members nearer to each other just before the moment of separation of said contact members, and means to bring said screen members to their original relative position after extinction of the are drawn between said contact members.
  • a gas blast circuit breaker comprising in combination two aligned movable cylindrical contact members, at least one of said contact members having a tubular term, a pair of screen members defining around said contact members a substantially annular space through which the gas blast is exhausted at the moment of separation of said contact members, one of said screen members being fixed, the other of said screen members being disposed on one of said contact members, said last named contact member etfecting a reciprocating movement during the opening of the circuit breaker and urging the other con tact member in the same direction during its forward movement.
  • a gas blast circuit breaker comprising in combination two aligned movable cylindrical contact members, at least one of said contact members having a tubular form, a pair of screen members defining around said contact members a substantially annular space through which the gas blast is exhausted at the moment of separation of said contact members, one of said screen members being fixed, the other of said screen members being disposed on one of said contact members, said last named contact member effecting a reciprocating movement during the opening of the circuit breaker, and an exhaust valve rigidly connected to said last named contact member.
  • a gas blast circuit breaker comprising in combination two aligned relatively movable tubular contact members, a pair of screen members defining around said contact members a substantially annular space through which the gas blast exhausts into said contact members at the moment of their separation, means to bring said screen members nearer to each other during the beginning of the blast period, and means to bring said screen members to their original relative position at the end of said blast period.

Landscapes

  • Circuit Breakers (AREA)
US124948A 1960-07-18 1961-07-18 Gas blast circuit breakers having at least one tubular contact Expired - Lifetime US3185802A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR4274A FR1270584A (fr) 1960-07-18 1960-07-18 Perfectionnements aux disjoncteurs pneumatiques ayant au moins un contact tubulaire
FR976282A FR91613E (fr) 1964-05-28 1964-05-28 Perfectionnements aux disjoncteurs pneumatiques ayant au moins un contact tubulaire

Publications (1)

Publication Number Publication Date
US3185802A true US3185802A (en) 1965-05-25

Family

ID=26207957

Family Applications (1)

Application Number Title Priority Date Filing Date
US124948A Expired - Lifetime US3185802A (en) 1960-07-18 1961-07-18 Gas blast circuit breakers having at least one tubular contact

Country Status (3)

Country Link
US (1) US3185802A (fr)
CH (1) CH373794A (fr)
FR (1) FR1270584A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339046A (en) * 1964-05-25 1967-08-29 Bbc Brown Boveri & Cie Blast valve arrangement for compressed gas operated circuit breakers
US3350529A (en) * 1964-03-12 1967-10-31 Asea Ab Air blast circuit breaker with auxiliary enclosed housing
US3418440A (en) * 1965-09-14 1968-12-24 Gen Electric Gas-blast circuit breaker
US3686454A (en) * 1968-09-16 1972-08-22 Lee E Berkebile Gas-blast circuit interrupter with primary and secondary blast valves
US4748303A (en) * 1985-12-20 1988-05-31 Merlin Gerin Isolating switch of a high voltage metalclad installation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294811A (fr) * 1962-07-02
NL122860C (fr) * 1964-04-03
NL126949C (fr) * 1967-04-14 1967-04-14

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB432453A (en) * 1934-03-28 1935-07-26 Gen Electric Co Ltd Improvements in electric switches or circuit breakers of the kind provided with separable electrodes, the arc gap between which is adapted to be swept by a stream of fluid
GB575887A (en) * 1944-04-22 1946-03-08 Ferguson Pailin Ltd Improvements in gas blast high voltage electric circuit breakers
US3027439A (en) * 1957-01-31 1962-03-27 Westinghouse Electric Corp High speed electric switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB432453A (en) * 1934-03-28 1935-07-26 Gen Electric Co Ltd Improvements in electric switches or circuit breakers of the kind provided with separable electrodes, the arc gap between which is adapted to be swept by a stream of fluid
GB575887A (en) * 1944-04-22 1946-03-08 Ferguson Pailin Ltd Improvements in gas blast high voltage electric circuit breakers
US3027439A (en) * 1957-01-31 1962-03-27 Westinghouse Electric Corp High speed electric switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350529A (en) * 1964-03-12 1967-10-31 Asea Ab Air blast circuit breaker with auxiliary enclosed housing
US3339046A (en) * 1964-05-25 1967-08-29 Bbc Brown Boveri & Cie Blast valve arrangement for compressed gas operated circuit breakers
US3418440A (en) * 1965-09-14 1968-12-24 Gen Electric Gas-blast circuit breaker
US3686454A (en) * 1968-09-16 1972-08-22 Lee E Berkebile Gas-blast circuit interrupter with primary and secondary blast valves
US4748303A (en) * 1985-12-20 1988-05-31 Merlin Gerin Isolating switch of a high voltage metalclad installation

Also Published As

Publication number Publication date
FR1270584A (fr) 1961-09-01
CH373794A (fr) 1963-12-15

Similar Documents

Publication Publication Date Title
US2933575A (en) Circuit interrupters
US4046978A (en) Contact structure for puffer-type gas-blast circuit interrupter
US3257532A (en) Arc-extinguishing circuit-breakers
US3185802A (en) Gas blast circuit breakers having at least one tubular contact
US3009042A (en) Circuit interrupters
US3824360A (en) Compressed gas electrical circuit breaker
US3160727A (en) Gas-blast orifice-type interrupting unit
JPH02172121A (ja) 高圧遮断器
GB1604927A (en) Dual-compression gas-blast puffer-type interrupting device
US2924690A (en) Circuit interrupters
US3311726A (en) Puffer-type fluid-blast circuit interrupter with pressurized casing for actuating driving piston
US2913559A (en) Fluid-blast circuit interrupter
US2246171A (en) Method of and apparatus for interrupting electric arcs
US3290469A (en) Compressed-gas circuit interrupter having cavitation means
US3379849A (en) Dual-pressure gas-blast circuit breaker with piston means and interrupting unit in closed tank
US2919329A (en) Air blast circuit breakers
JP2577116B2 (ja) 高圧又は中電圧の遮断器
US3538282A (en) Fluid-blast circuit interrupters with exhaust valves responsive solely to the pressure generated by an arc of excessive magnitude
US4264794A (en) Circuit interrupter including arc extinguishing fluid pressurization means and pressure accumulating means
US3603754A (en) Contact structure for high-voltage circuit interrupter with liner components
GB1264756A (fr)
US3334207A (en) Gas blast circuit-breaker with stationary spaced tubular contacts and piston actuated contact bridge including blast valve actuated thereby
US3567885A (en) Isolator switch with bridging resistance and extinguishing gas control
US3439140A (en) Pressure gas operated switch with closed gas circuit
US3164705A (en) Fluid-blast circuit interrupters with retractable impedance probe