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US3235695A - Air blast circuit breaker with damping resistor in parallel with the main breaking gap - Google Patents

Air blast circuit breaker with damping resistor in parallel with the main breaking gap Download PDF

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Publication number
US3235695A
US3235695A US203792A US20379262A US3235695A US 3235695 A US3235695 A US 3235695A US 203792 A US203792 A US 203792A US 20379262 A US20379262 A US 20379262A US 3235695 A US3235695 A US 3235695A
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US
United States
Prior art keywords
resistor
chamber
circuit breaker
interrupter
parallel
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
US203792A
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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 US3235695A publication Critical patent/US3235695A/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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts

Definitions

  • This invention relates to a novel construction for air blast circuit breakers having resistor means in parallel with the main breaking gap and more specifically relates to a novel housing arrangement wherein the resistor and the interrupting contacts are contained in separate chambers which are each adapted to contain high pressure air with a non-return valve connecting the interior of the interrupter chamber with the interior of the resistor chamher.
  • resistors In making these resistors and in physically mounting them in the circuit breaker, materials are used which will withstand as high a temperature rise as possible and the resistor is preferably contained within a compressed air filled container which is normally the same container which carries the interrupting contacts.
  • the air within the container will be heated to extremely high temperatures to thereby decrease dielectric strength of the air and thus jeopardize the interrupting ability of the circuit breaker.
  • the principle of the present invention is to provide a novel structure in which the interrupter contacts are contained in a first compressed air filled chamber while the resist-or is connected in a second compressed air filled chamber.
  • a one-way valve is connected between the two chambers so that the resistor chamber can be supplied with air f-rom the interrupter chamber.
  • this valve is a one-way valve, when the compressed air within the resistor chamber is heated it cannot return to the interrupter chamber.
  • the air within the resistor chamber is confined in a small volume by virtue of the one-way valve arrangement, the pressure within the resistor chamber will.
  • the insulation within the resistor container presents no special difiiculties as the separate container for the resistor without greater costs may be made to withstand higher pressure than the other parts of the breaker.
  • a safety valve or overpressure valve can 3,235,595 Patented Feb. 15, 1966 be provided in the resistor chamber to prevent the build up of pressures which could rupture the chamber.
  • the resistor chamber can be formed of a metallic housing with suitable cooling fins to permit rapid dissipation of heat.
  • a primary object of this invention is to provide a novel interrupter structure in which the heating of a parallel connected resistor will not interfere with the dielectric integrity of the interrupter chamber.
  • Another object of this invention is to provide a novel duel housing arrangement for interrupter contacts and a parallel connected resistor respectively where the two are pneumatically connected through a non-return valve.
  • the circuit breaker is mounted on a tank 16 which serves as a source of high pressure gas which can be supplied to tank 10 over the conduit 11.
  • a hollow insulation post 12 extends from tank 10 and carries the interrupter structure 13 of the circuit breaker.
  • This interrupter structure 13 is more specifically comprised of an interrupter chamber 14 and a resistor chamber 15.
  • the interrupter chamber is formed of a metallic enclosure 16 and has 2 insulator bushings 17 and 18 extending therein.
  • the insulator bushing 17 is schematically illustrated as terminating in a movable auxiliary breaking contact 1? and stationary interrupting contact 20.
  • the stationary main interrupting contact 20 cooperates with a movable interrupter contact 21 which is connected directly to the metallic wall 16 of the interrupter housing 14.
  • Terminal bushing 18 is terminated with a stationary contact 22 which cooperates with auxiliary interrupter contact 19.
  • the movable contacts 19 and 21 are operated in a predetermined sequence by appropriate operating mechanism-s (not shown) which do not form any part of the present invention.
  • the resistor chamber 15 carries a resistor means 16' therein which has one end connected to the upper end of terminal bushing 18 and its upper end is connected to the metallic walls 23 of resistor chamber 15.
  • the metallic walls 23 are electrically connected to walls 16 of interrupter chamber 14 and can be provided with fins, such as fin 24, to serve as an aid in dissipating heat generated by resistor 16'.
  • a one-way valve 30 is then connected between conduit 31 which leads through wall 16 of interrupter chamber 14 and orifice 32 in the wall 23.
  • the one-way valve 30 is so arranged that it will permit gas to flow from chamber 14 and into chamber 15 but will prevent flow of gas from chamber 15 to chamber 14.
  • housing walls 23 of the housing 15 are preferably stronger than walls 16 since housing 23 will normally be exposed to higher pressures than will the walls 16 of housing 14.
  • the overpressure valve 33 is adjusted to relieve pressure when it reaches a predetermined high value.
  • An air blast circuit breaker comprising means forming an interrupter chamber and a resistor chamber each containing a high pressure gas, a resistor means contained within said resistor chamber, a main interrupting contact means and an auxiliary interrupting ,contact means contained within said interrupter chamber, said resistor means being electrically connected in parallel ,.With said main interrupting contact means, said resistor means and said auxiliary interrupting contact means being electrically connected in series; non-return valve means pneumatically connecting said two chambers for permitting the flow of gas from said interrupter chamber to said resistor chamber while preventing the flow of gas from said resistor chamber to said interrupter chamber, said resistor means being exposed to the high pressure gas in said resistor chamber.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Details Of Resistors (AREA)
US203792A 1961-06-26 1962-06-20 Air blast circuit breaker with damping resistor in parallel with the main breaking gap Expired - Lifetime US3235695A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE666561 1961-06-26

Publications (1)

Publication Number Publication Date
US3235695A true US3235695A (en) 1966-02-15

Family

ID=20269289

Family Applications (1)

Application Number Title Priority Date Filing Date
US203792A Expired - Lifetime US3235695A (en) 1961-06-26 1962-06-20 Air blast circuit breaker with damping resistor in parallel with the main breaking gap

Country Status (4)

Country Link
US (1) US3235695A (de)
CH (1) CH393476A (de)
DE (1) DE1191015B (de)
GB (1) GB1003042A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100102036A1 (en) * 2008-10-24 2010-04-29 Kabushiki Kaisha Toshiba Gas insulated circuit breaker system and gas insulated circuit breaker monitoring method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214049A1 (de) * 1992-04-29 1993-11-04 Heidelberger Druckmasch Ag Vorrichtung zum zufuehren einer druckplatte zu einem plattenzylinder einer druckmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068522A (en) * 1935-11-29 1937-01-19 Dewey C Thordarson Ignition transformer
US2160660A (en) * 1937-09-23 1939-05-30 Gen Electric High potential terminal
US2459612A (en) * 1944-12-22 1949-01-18 Westinghouse Electric Corp Compressed gas circuit interrupter
US2729721A (en) * 1952-03-19 1956-01-03 Asea Ab High tension circuit breakers
US2921168A (en) * 1956-03-19 1960-01-12 Asea Ab High tension air blast circuit breaker comprising a number of breaking units with breaking contacts arranged inside air containers carried by insulator pillars
US2981815A (en) * 1957-12-10 1961-04-25 Westinghouse Electric Corp Circuit interrupter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1050857B (de) * 1954-03-02 1959-02-19
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
CH348438A (de) * 1956-05-30 1960-08-31 Bbc Brown Boveri & Cie Druckluftschalter mit Schaltkammer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068522A (en) * 1935-11-29 1937-01-19 Dewey C Thordarson Ignition transformer
US2160660A (en) * 1937-09-23 1939-05-30 Gen Electric High potential terminal
US2459612A (en) * 1944-12-22 1949-01-18 Westinghouse Electric Corp Compressed gas circuit interrupter
US2729721A (en) * 1952-03-19 1956-01-03 Asea Ab High tension circuit breakers
US2921168A (en) * 1956-03-19 1960-01-12 Asea Ab High tension air blast circuit breaker comprising a number of breaking units with breaking contacts arranged inside air containers carried by insulator pillars
US2981815A (en) * 1957-12-10 1961-04-25 Westinghouse Electric Corp Circuit interrupter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100102036A1 (en) * 2008-10-24 2010-04-29 Kabushiki Kaisha Toshiba Gas insulated circuit breaker system and gas insulated circuit breaker monitoring method
US8199445B2 (en) * 2008-10-24 2012-06-12 Kabushiki Kaisha Toshiba Gas insulated circuit breaker system and gas insulated circuit breaker monitoring method

Also Published As

Publication number Publication date
CH393476A (de) 1965-06-15
GB1003042A (en) 1965-09-02
DE1191015B (de) 1965-04-15

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