US3597557A - Compressed gas actuated electrical switch with sleeve valves - Google Patents

Compressed gas actuated electrical switch with sleeve valves Download PDF

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Publication number
US3597557A
US3597557A US10852A US3597557DA US3597557A US 3597557 A US3597557 A US 3597557A US 10852 A US10852 A US 10852A US 3597557D A US3597557D A US 3597557DA US 3597557 A US3597557 A US 3597557A
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United States
Prior art keywords
piston
valve
housing
gas
cylinder
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Expired - Lifetime
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US10852A
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English (en)
Inventor
Dieter Floessel
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.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
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BBC Brown Boveri France SA
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Filing date
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Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
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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
    • H01H33/80—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

Definitions

  • An electrical circuit breaker of the gas blast type includes a double-acting cylinder having the piston element connected to one of the contact members for opening and closing the circuit through the breaker respectively each time the piston is actuated in one direction or the other by successive opening operations of a gas blast valve which functions to deliver high-pressure gas to the circuit breaker contacts and also to one or the other of inlet ports located at opposite ends of the cylinder.
  • the cylinder includes a reversing sleeve valve actuated by movement of the piston in one direction so as to ready the cylinder for piston movement in the opposite direction the next time that the blast valve is opened.
  • the present invention relates to electrical circuit breakers of the gas blast type which include at least one switching point constituted by a pair of relatively movable contact members located in a normally low-pressure chamber. A blast of gas at high pressure is fed to the contact chamber through a blast valve in order to open the circuit through the contact members and a similar gas blast is utilized in order to reclose the circuit.
  • the movable contact member is actuated to open and closed position by means of a gas-operated reversing mechanism which is readied at the end of each movement of the contact member in one direction to operate the contact member in the opposite direction at the next gas blast.
  • Circuit breakers of this general type are already known, reference being made to the structure disclosed in German Pat. No. 1,023,507 in which a three-way valve cock is operated by a transmission gearing in conjunction with a stepping mechanism.
  • the principal object of the present invention is to provide a more simple and advantageous construction for the gasoperated reversing mechanism.
  • the blast valve is constnicted as a sleeve valve which opens briefly during each operation of the circuit breaker, i.e., from closed to open position of the contacts, or vice versa, to admit highpressure gas to the switch contact chamber and also into one or the other end of a double-acting cylinder containing a piston that drives a piston rod in a corresponding direction and which is connected by suitable linkage to the movable contact member of the circuit breaker, so as to open the breaker contacts when the piston and piston rod move in one direction, and to close the breaker contacts when movement of the piston and piston rod is in the opposite direction.
  • Gas admission into the cylinder at one end or the other is controlled by a reversing sleeve valve located within the cylinder and which forms the cylinder wall in engagement with the piston, the sleeve valve being shifted by the piston from one control position to the other.
  • the piston is also maintained stably in its end positions corresponding to the closed and open positions. respectively of the circuit breaker contacts by means of a spring loaded overcenter toggle mechanism.
  • the improved construction in accordance with the invention has a number of advantages, among them being that the force required to be transmitted to the blast valve sleeve to initiate the breaker contact operating mechanism is quite small since only friction forces acting on the sleeve are required to be overcome. Moreover, the entire system is practically in a forcedree state in either of its two rest positions.
  • FIG. la is a view in vertical central section of one switch contact chamber and the associated blast valve and reversing mechanism for the contacts of a dual switching point circuit breaker, the contact members being shown in closed circuit position;
  • FIG. lb is a view similar to FIG. 1a but showing the contact members in open circuit position.
  • the circuit breaker structure includes a metallic housing 2 supported atop the insulator column 1 and extending laterally from this housing is a hollow insulator 3 which constitutes a switch chamber enclosing a contact structure of generally known type including a stationary contact pin 4 which is engageable by a movable nozzle contact assembly 5 which is spring loaded into engagement with the contact pin 4 when the contact members occupy their closed position. Gas at high pressure is caused to flow into and through the nozzle contact 5 when the contacts 4 and 5 separate, and the gas is discharged from nozzle contact 5 through a duct 20 into the lower part of housing 2 which is at relative low gas pressure.
  • the housing part 2b which communicates with the interior of contact chamber 3 supports an upstanding annular chamber 6 which serves to store gas at high pressure and which surrounds a vertical cylinder 20 which is open at the bottom and in communication with the casing part 2b.
  • the wall of this cylinder which constitutes the inner wall of annular chamber 6 is provided with a series of circumferentially spaced gas ports 2d which are adapted to cooperate with a similar circumferential arrangement of ports 7a in sleeve valve 7 which is actuated in a vertical direction by means of a rod 8, the valve sleeve being secured to the upper end of this rod which extends downwardly through casing 2 and through insulator column, I to the lower end thereof at which is located a driving mechanism of conventional construction and not therefore illustrated, this mechanism sewing to actuate the rod 8 down or up as the case may be to open or close the circuit breaker contacts.
  • the portion of rod 8 which extends downwardly through the support column 1 is insulated, and is also guided at one or more vertically spaced points within
  • a double-acting cylinder la Located within housing 2 and in vertical alignment with sleeve 2c and below the latter is a double-acting cylinder la in which is slidably mounted a reversing sleeve valve 10 and a piston 11 located inwardly of the sleeve valve.
  • Cylinder 2e is provided with upper and lower high-pressure inlet ports 9 and intermediate exhaust ports 9 which communicate with the low-pressure portion of housing 2.
  • the sleeve valve 10 is provided with upper and lower ports 9a which are adapted to register with the upper and lower ports 9, 9' in cylinder 2e.
  • piston 11 engages and is slidable along the inner surface of sleeve valve HI, and the outer surface of sleeve valve 10 is slidably engaged with the inner surface of cylinder 2e. Moreover, piston 11 is adapted to engage an upper shoulder on sleeve valve 10 to hold the valve in the upper position shown in FIG. la, and similarly engages a lower shoulder I0b to hold the valve in the lower position shown in FIG. 1b.
  • Piston II is provided with a tubular piston rod which surrounds the rod 8 and extends in both directions through the upper and lower end walls of cylinder 2e.
  • the upwardly extending part of piston rod 110 is secured to a link and lever-actuating mechanism consisting of links 12a and 12c and a lever 12b intermediate the links, the link being secured to a lateral extension arm from piston lla and the link 120 being secured to a horizontal guide rod 5a integral with the movable nozzle contact assembly 5.
  • the downwardly extending part of piston rod 110 is articulated to a spring-loaded overcenter toggle link assembly 13 which functions to yieldingly position the piston rod Ila in each limit position.
  • the toggle links 13 secured to piston rod 110 are thus seen to be inclined upwardly when piston rod 110 occupies its upper position (FIG.
  • the circuit breaker structure operates in the following manner:
  • the actuating rod 8 can also serve, in an advantageous manner to indicate the switch position at ground level since its end positions are clearly associated with the "on" and "off" circuit breaker positions.
  • the combination comprising at least one switching point established by a pair of contact members, at least one of said contact members being movable for opening and closing a circuit through the members as the members disengage and engage, respectively, a chamber structure enclosing said contact members, a housing, said housing being lll communication with said contact chamber structure and being at a low gas pressure when said contact members occupy their engaged and disengaged positions, a storage chamber for high-pressure gas adjacent said housing, a blast valve structure including a sleeve valve, a rod secured to said sleeve valve for actuating the same, said sleeve valve being movable between two limit positions in which said valve is closed and the valve being tem porarily opened during an intermediate portion of the complete stroke of the valve to place said high-pressure gas storage chamber in communication with said housing and contact chamber, a double-acting cylinder located within said housing, said cylinder including inlet ports at the opposite ends thereof, a reversing

Landscapes

  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US10852A 1969-02-18 1970-02-12 Compressed gas actuated electrical switch with sleeve valves Expired - Lifetime US3597557A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH241269A CH495625A (de) 1969-02-18 1969-02-18 Druckgasschalter
DE1908249A DE1908249C3 (de) 1969-02-18 1969-02-19 Druckgasschalter

Publications (1)

Publication Number Publication Date
US3597557A true US3597557A (en) 1971-08-03

Family

ID=25690392

Family Applications (1)

Application Number Title Priority Date Filing Date
US10852A Expired - Lifetime US3597557A (en) 1969-02-18 1970-02-12 Compressed gas actuated electrical switch with sleeve valves

Country Status (5)

Country Link
US (1) US3597557A (de)
CH (1) CH495625A (de)
DE (1) DE1908249C3 (de)
FR (1) FR2035466A5 (de)
GB (1) GB1259263A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852548A (en) * 1973-07-18 1974-12-03 Allis Chalmers Actuating mechanism for contact and blast valve unit
US4307273A (en) * 1978-03-24 1981-12-22 Hitachi, Ltd. Gas blast circuit breaker
US4418336A (en) * 1981-07-17 1983-11-29 Taylor John D Alarm indicating dislocation of fire extinguisher

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921521C (de) * 1952-10-08 1954-12-20 Voigt & Haeffner Ag Fluessigkeitsloeschkammer mit Differentialpumpkolben
FR1128745A (fr) * 1955-07-11 1957-01-09 Vérin hydraulique convenant en particulier à la commande de disjoncteurs à haute tension
DE1216962B (de) * 1964-01-24 1966-05-18 Bbc Brown Boveri & Cie Einrichtung fuer Druckgasschalter
DE1218584B (de) * 1963-12-30 1966-06-08 Licentia Gmbh Hochspannungsleistungsschalter mit Lichtbogenloeschung durch einstroemendes Loeschmittel
DE1233048B (de) * 1965-12-18 1967-01-26 Licentia Gmbh Hochspannungsleistungsschalter mit Lichtbogen-loeschung durch ein stroemendes Loeschmittel
US3436505A (en) * 1966-05-04 1969-04-01 Ite Circuit Breaker Ltd Slide valve for gas blast breakers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE921521C (de) * 1952-10-08 1954-12-20 Voigt & Haeffner Ag Fluessigkeitsloeschkammer mit Differentialpumpkolben
FR1128745A (fr) * 1955-07-11 1957-01-09 Vérin hydraulique convenant en particulier à la commande de disjoncteurs à haute tension
DE1218584B (de) * 1963-12-30 1966-06-08 Licentia Gmbh Hochspannungsleistungsschalter mit Lichtbogenloeschung durch einstroemendes Loeschmittel
DE1216962B (de) * 1964-01-24 1966-05-18 Bbc Brown Boveri & Cie Einrichtung fuer Druckgasschalter
DE1233048B (de) * 1965-12-18 1967-01-26 Licentia Gmbh Hochspannungsleistungsschalter mit Lichtbogen-loeschung durch ein stroemendes Loeschmittel
US3436505A (en) * 1966-05-04 1969-04-01 Ite Circuit Breaker Ltd Slide valve for gas blast breakers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852548A (en) * 1973-07-18 1974-12-03 Allis Chalmers Actuating mechanism for contact and blast valve unit
US4307273A (en) * 1978-03-24 1981-12-22 Hitachi, Ltd. Gas blast circuit breaker
US4418336A (en) * 1981-07-17 1983-11-29 Taylor John D Alarm indicating dislocation of fire extinguisher

Also Published As

Publication number Publication date
DE1908249C3 (de) 1980-01-10
DE1908249B2 (de) 1979-04-12
DE1908249A1 (de) 1970-09-17
GB1259263A (de) 1972-01-05
FR2035466A5 (de) 1970-12-18
CH495625A (de) 1970-08-31

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