US3093717A - Air blast circuit breaker having a series connected breaking gap in a bushing - Google Patents

Air blast circuit breaker having a series connected breaking gap in a bushing Download PDF

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Publication number
US3093717A
US3093717A US91209A US9120961A US3093717A US 3093717 A US3093717 A US 3093717A US 91209 A US91209 A US 91209A US 9120961 A US9120961 A US 9120961A US 3093717 A US3093717 A US 3093717A
Authority
US
United States
Prior art keywords
contacts
pair
bushing
container
compressed air
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
US91209A
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English (en)
Inventor
Forwald Haakon
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3093717A publication Critical patent/US3093717A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • 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
    • H01H33/302—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator for fluid insulated switchgear, wherein the insulating fluid is also the working fluid
    • 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
    • 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
    • H01H33/83—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 wherein the contacts are opened by the flow of 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
    • H01H33/86—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

  • This invention relates to air blast circuit breakers wherein the bushing carrying the main stationary contact of the circuit breaker with respect to a conductive housing further contains internally thereof a pair of contacts which can normally be immersed in high pressure High voltage air blast circuit breakers are well known to the art wherein the main breaking gap is enclosed Within a conductive container which has sufficient high pressure air therein for at least one contact operation.
  • the conductive container is carried through the ground by pillar insulator means with one contact of the main breaking gap being mechanically and electrically connected to the conductive container while the other contact is carried from the container by an insulating bushing which projects into the container.
  • a series connected breaking gap is connected in series with the main breaking gap and is contained within a single bushing which is terminated by the stationary contact of the main breaking gap.
  • this internal bushing portion is filled with compressed air. This can be obtained, for example, by causing the internal volume of the bushing to communicate with the internal volume of the conductive compressed air container when the m-ain breaking gap within the compressed air container is open and by causing nitcd States Patent the volume within the bushing to be exhausted to free air when the main breaking gap is closed.
  • the movable contact of the series con nected breaking gap within the bushing is provided with appropriate means for maintaining the contacts open so long as there is compressed air within the volume.
  • the movable contact of the series connected breaking gap within the bushing will close.
  • the cooperating contacts of the main breaking gap may act as a control valve for the operation of the contacts contained within the bushing whereby the series connected gap within the bushing will open only after the main breaking gap is opened. During the closing sequence, the series connected breaking gap will close only after the main breaking gap is closed.
  • the present invention also permits a simplification in the connection of a parallel resistance across the main breaking gap. That is to say, the series breaking gap contained within the bushing can additionally serve as an auxiliary breaking gap for current flow through a control resistance in parallel with the main breaking gap after operation of the main breaking gap.
  • special arrangements in an auxiliary breaking gap within the compressed air container are not needed whereby there is a substantial simplification of the contact structure.
  • the resistor may be wound around the projecting end of the bushing within the conductive container.
  • a primary object of this invention is to provide a novel high voltage air blast circuit breaker.
  • Another object of this invention is to provide a novel high voltage air blast circuit breaker wherein corona at the point at which a bushing enters a conductive high pressure air container is eliminated.
  • Another object of this invention is to provide a simple mechanical arrangement for an air blast circuit breaker having two series connected breaking gaps.
  • Another object of this invention is to provide a novel air blast circuit breaker wherein a bushing which enters a conductive container and has a stationary contact terminated thereon additionally includes an auxiliary pair of contacts contained within the bushing to be connected in series with the main circuit breaker contacts.
  • a further object of the invention is to provide a bushing having a stationary contact at the end thereof which projects deeply into a conductive compressed air container and has a resistive wire wrapped thereon.
  • the drawing illustrates a conductive container 1 which is permanently filled with compressed air and which carries the main breaking gap of the circircuit breaker.
  • the main breaking gap is 'formed of a stationary contact 2 and a movable contact 3 where movable contact 3 is electrically connected to container 1 and is provided with an outlet channel 4 through which compressed air may flow.
  • the outlet channel 4 communicates with channel 5 under the control of a stop valve 6' which is closed only in the open position of the main breaking gap which includes contacts 2 and 3.
  • a stop valve 6' which is closed only in the open position of the main breaking gap which includes contacts 2 and 3.
  • the movable contact 3 is carried by a piston 7 and is normally biased to the closed position by a biasing spring v3
  • the stationary contact 2 is carried at the end of an insulating bushing 9 which is secured to one wall of container ll.
  • Bushing 9 is provided with an internal cavitywhich receives an auxiliary breaking gap which includes a stationary contact 1t) and a movable contact 11 which is carried by a piston 12.
  • the movable contact 11 is biased to a closed position by a biasing spring 13.
  • the cavity or volume 14 within bushing 9 and which contains the series connected breaking gap communicates with outlet channel 4- by means of the communicating channel 15 through the stationary contact Soil.
  • Volume 14- may be vented to the open air through a blast air channel 16 in movable contact 11 when the movable contact 11 moves toward the left .to expose the vent at the right-hand end of movable contact 11.
  • blast air channel 16 is sealed when contact 11 moves to its leftrncst position engaging a gasket 17 which seals off the left-hand end of blast channel 16.
  • control resistance 18 formed of a wound wire wound thereon and connected from container 1 to the stationary contact 2 whereby resistance 18 is connected in parallel with contacts 2 and 3.
  • volume 19 which is to the left of piston 7 by a source of control air not shown. This will cause the piston 7 and contact 3 which is connected thereto to be moved to the right.
  • the compressed air Within container 1 then flows out through the separating contacts and through the outer channel 4, channel and the open stop valve 6 which, when the circuit breaker is completely opened, is closed when compressed air from volume 19 flows through channel 2% and into volume 21.
  • channel is opened so that container 1 is connected to volume 1 which will be filled with compressed air.
  • the pressure :on piston 12 will, therefore, increase so that the movable contact 11 is moved to the left and toward its open position.
  • a conductive compressed air container connected to a source of compressed air, a first pair of contacts, a second pair of contacts and an insulating bushing; said insulating bushing entering said compressed air container and having one of said first pair of contacts secured to the end thereof within said compressed air container; the other contact of said first pair of contacts being connected to said compressed air container and having an outlet channel therethrough, means mounted on said other contact for closing said outlet channel from the container in the closed position of the first pair of contacts; a cavity within said insulating bushing; said second pair of contacts being contained within said cavity in said insulating bushing and being connected in series with said first pair of contacts, first means for connectin the cavity in the closed position of the first pair of contacts, with the open air to close said second pair of contacts, said first connecting means inciudin a permanently open connecting channel between said cavity and said outlet channel, said connecting means in the open position of said first pair of contacts connecting said cavity with the container through said connecting channel to open said second pair of contacts, and
  • resistance means connected in parallel With said first pair of contacts, said resistance means being mounted on the portion of said bushing entering said compressed air container.

Landscapes

  • Insulators (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US91209A 1960-02-25 1961-02-23 Air blast circuit breaker having a series connected breaking gap in a bushing Expired - Lifetime US3093717A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE189460 1960-02-25

Publications (1)

Publication Number Publication Date
US3093717A true US3093717A (en) 1963-06-11

Family

ID=20259022

Family Applications (1)

Application Number Title Priority Date Filing Date
US91209A Expired - Lifetime US3093717A (en) 1960-02-25 1961-02-23 Air blast circuit breaker having a series connected breaking gap in a bushing

Country Status (4)

Country Link
US (1) US3093717A (de)
CH (1) CH382828A (de)
DE (1) DE1163940B (de)
GB (1) GB908686A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198916A (en) * 1962-11-29 1965-08-03 Ite Circuit Breaker Ltd Vented movable resistor contact for air blast circuit breakers
US3206582A (en) * 1961-12-07 1965-09-14 Bbc Brown Boveri & Cie Air-blast circuit breaker with double nozzle
US3433913A (en) * 1965-07-28 1969-03-18 Westinghouse Electric Corp Gas-blast circuit interrupter
US3686454A (en) * 1968-09-16 1972-08-22 Lee E Berkebile Gas-blast circuit interrupter with primary and secondary blast valves

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1244916B (de) * 1965-02-05 1967-07-20 Licentia Gmbh Leistungsschalter mit Lichtbogenloeschung durch ein stroemendes Loeschmittel
JPH01213927A (ja) * 1988-02-23 1989-08-28 Mitsubishi Electric Corp 碍子形ガスしや断器

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE568382A (de) * 1957-06-07
GB553093A (en) * 1965-09-20 1943-05-06 Reyrolle A & Co Ltd Improvements in or relating to a.c. electric circuit-breakers of the gas-blast type
GB605163A (en) * 1945-12-17 1948-07-16 Reyrolle A & Co Ltd Improvements in or relating to gas-blast electric circuit-breakers
US2459600A (en) * 1944-12-14 1949-01-18 Westinghouse Electric Corp Compressed gas circuit interrupter
DE1062788B (de) * 1958-03-08 1959-08-06 Bbc Brown Boveri & Cie Schalter mit Lichtbogenloeschung durch ein stroemendes Loeschmittel und mit Haupt- und Hilfsunterbrechungs-stellen
DE1063682B (de) * 1958-10-10 1959-08-20 Voigt & Haeffner Ag Hochspannungsdruckluftschalter mit Vielfachunterbrechung pro Pol
US2902570A (en) * 1957-07-01 1959-09-01 British Thomson Houston Co Ltd Air or gas blast electric circuit breakers
FR1207558A (fr) * 1957-06-29 1960-02-17 Asea Ab Disjoncteur pneumatique dont les zones de coupure sont contenues dans les réservoirs d'air comprimé portés par des colonnes isolantes
FR1218705A (fr) * 1958-01-10 1960-05-12 Westinghouse Electric Corp Interrupteur pneumatique
US2949521A (en) * 1957-09-12 1960-08-16 Asea Ab High tension air blast circuit breaker

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665351A (en) * 1951-02-09 1954-01-05 Asea Ab Arrangement in air blast circuit breaker provided with damping resistance
BE519814A (de) * 1952-05-31
GB764646A (en) * 1954-02-17 1956-12-28 Asea Ab Improvements in air blast electric circuit breakers
BE536110A (de) * 1954-03-02
GB824103A (en) * 1954-11-24 1959-11-25 Lewis Berger & Sons Ltd Improvements in or relating to the manufacture of copolymers of epoxide resin esters

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459600A (en) * 1944-12-14 1949-01-18 Westinghouse Electric Corp Compressed gas circuit interrupter
GB605163A (en) * 1945-12-17 1948-07-16 Reyrolle A & Co Ltd Improvements in or relating to gas-blast electric circuit-breakers
BE568382A (de) * 1957-06-07
FR1207558A (fr) * 1957-06-29 1960-02-17 Asea Ab Disjoncteur pneumatique dont les zones de coupure sont contenues dans les réservoirs d'air comprimé portés par des colonnes isolantes
US2902570A (en) * 1957-07-01 1959-09-01 British Thomson Houston Co Ltd Air or gas blast electric circuit breakers
US2949521A (en) * 1957-09-12 1960-08-16 Asea Ab High tension air blast circuit breaker
FR1218705A (fr) * 1958-01-10 1960-05-12 Westinghouse Electric Corp Interrupteur pneumatique
DE1062788B (de) * 1958-03-08 1959-08-06 Bbc Brown Boveri & Cie Schalter mit Lichtbogenloeschung durch ein stroemendes Loeschmittel und mit Haupt- und Hilfsunterbrechungs-stellen
DE1063682B (de) * 1958-10-10 1959-08-20 Voigt & Haeffner Ag Hochspannungsdruckluftschalter mit Vielfachunterbrechung pro Pol
GB553093A (en) * 1965-09-20 1943-05-06 Reyrolle A & Co Ltd Improvements in or relating to a.c. electric circuit-breakers of the gas-blast type

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206582A (en) * 1961-12-07 1965-09-14 Bbc Brown Boveri & Cie Air-blast circuit breaker with double nozzle
US3198916A (en) * 1962-11-29 1965-08-03 Ite Circuit Breaker Ltd Vented movable resistor contact for air blast circuit breakers
US3433913A (en) * 1965-07-28 1969-03-18 Westinghouse Electric Corp Gas-blast circuit interrupter
US3686454A (en) * 1968-09-16 1972-08-22 Lee E Berkebile Gas-blast circuit interrupter with primary and secondary blast valves

Also Published As

Publication number Publication date
DE1163940B (de) 1964-02-27
CH382828A (de) 1964-10-15
GB908686A (en) 1962-10-24

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