US2453555A - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

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Publication number
US2453555A
US2453555A US582255A US58225545A US2453555A US 2453555 A US2453555 A US 2453555A US 582255 A US582255 A US 582255A US 58225545 A US58225545 A US 58225545A US 2453555 A US2453555 A US 2453555A
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US
United States
Prior art keywords
circuit breaker
interruption
contacts
points
pressure gas
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
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US582255A
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English (en)
Inventor
Thommen Hans
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
Original Assignee
BBC Brown Boveri France 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 BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
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Publication of US2453555A publication Critical patent/US2453555A/en
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Expired - Lifetime legal-status Critical Current

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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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc

Definitions

  • Gas blast circuit breakers with multiple interruption where the contacts are actuated by pressure gas and the arc at the contacts is extinguished by subjecting it to .a blast of pressure gas, and where at the same time an impedance (resistance or capacitance) is connected in parallel with the points of interruption, the voltage distribution over the points of interruption being controlled with the aid of this impedance.
  • impedance resistance or capacitance
  • this kind or circuit breaker it has been found that when currents of between a low and medium value are interrupted the arc voltage can assume high values, the voltages not being equal at all points of interruption. This results in an unequal voltage distribution over the points of interruption, and this in turn causes difiiculties in connection with the extinction of the arc at the various points of interruption which are arranged in series.
  • the present invention thus concerns a gas blast circuit Ibreaker with multiple interruption and voltage control of the compressed-gas operated isolated points of interruption by means of parallel impedances, whereby the disadvantages referred to are overcome according to the invention 'by the impedances being connected in parallel with the power interrupting points by special switching means.
  • the resistance can be made so small that the circuit breaker can also be used for overvoltage protection at low currents.
  • a further advantage is that the switching means for the partial resistances do not need to be dimensioned for a continuous current.
  • FIG. 1 and 2 show two different dlagrams of connections for the circuit breaker
  • Figs. 3 to 8 illustrate in diagrammatic form various possible constructional forms of circuit breakers with control resistances.
  • each point of interruption can have a part resistance connected in parallel with it, or as shown in Fig. 2 the impedances of several points of interruption can be combined to form a common ,disconnectable group.
  • the points of interruption a1, a2 etc. of the circuit breakers shown in Figs. 3 to 7 are equipped with self-closing contacts, one contact of each point being a spring-loaded pin contact which abuts against a nozzle-shaped hollow contact.
  • the contacts of each point of interruption are enclosed in hollow insulators d1, d2 etc. with metallic top and bottom elements.
  • the top and bottom elements support the contacts and are provided with passages for the flow of pressure gas to the contacts and also with outlet openings through which the gas from the contacts can be conducted away.
  • the points of interruption are mounted on a foundation f by means of a hollow supporting insulator e consisting of one or more parts, whereby the foundation j can be used as a compressed gas container and if necessary be mounted on wheels.
  • the control resistances g1 etc. together with their switching means are arranged in parallel with the points of interruption.
  • These resistances g1 etc., together with their switching means are located inside hollow insulators i1, etc. with metallic bottom and top elements, these insulators being arranged in the form of a column next to the extinguishing chamer insulators of the points of interruption.
  • the extinguishing chambers and the resistances are thus assembled in a similar manner. It is advisable to connect the hollow insulators contain ing the resistances and their switching means with the extinguishing chambers containing the points of interruption by means of common bottom and cover pieces k1 etc. ⁇ which contain the contact elements, as shown for instance in Fig. 3. By this means any number of switch elements can be assembled in column form.
  • the switching means for the resistances can consist of spark gaps with iixed or adjustable electrodes, or of switches with at least one moveable switch element.
  • the switching means are preferably subjected to a pressure gas blast and are pneumatically operated.
  • the contacts for the resistance switching means are constructed in the same Way as the contacts of the power circuit breaker; that is they are opened by pressure gas and are closed automatically by a spring.
  • the actuating and extinguishing pressure gas for the resistance switches can be taken from the extinguishing chambers containing the points of interruption.
  • the pressure gas for switching the resistancemcan however, also be teleco from a separate source.
  • the sparlr cari be pro-l vided with pin electrodes or with. e la. electrode ariel a hollow electrode.
  • the spari can be subjected to a transverseor lorlgit blast.
  • lt is also possible to locate the electrodes ci the spark gaps at each side of hostie made ci insulating material. Iii Fig. ll which shows the latter arrangement, the electrodes icriuirlg the gap pi are located ori opposite sides oi a sacarle t; the voltage control impedance is designated y1 as in the other embodiments previously described.
  • Fig. 6 shows a gas blast circuit breaker with spark gaps for switching the resistarices, where the switch gases from the points of interruption a1 to a3 are conducted away over the spari; gaps p1 to p3.
  • Fig. '7 shows a modified forro. oi the invention where the components of the control resistance are fixed one above the other to an insulating tube q which is contained in an insulator r.
  • the spark gaps are located inside tube q.
  • Pressure gas is conveyed to the insulating tube q through pipe s from the arcing chambers d1 to da. After passing the spark gaps pi to p3 the pressure gas ows between the insulating tube q aud insulator r over resistance g1 to g3 and. out through ne to the atmosphere.
  • Circuit breakers constructed as shown in Figs. 4 to 7 can be used with or without a series disconnecting switch, just is as the case with the circuit breaker according to Fig. 3.
  • a circuit breaker In a circuit breaker, a plurality of normally closed sets of main contacts connected in series circuit relation and operable to open by the application of pressure gas thereto, a plurality of impedances in parallel circuit relation across said sets of main contacts to carry the current upon opening or the main contacts and for controlling the voltage distribution over said main contacts on opening thereof.
  • sure gas operated switch means individual to each impedance connecting the same iii series circuit relation and adapted to interrupt the :dow of current therethrough.
  • each said arcing chamber come prising a hollow insulator forming the circumm ierehtial wall of the chamber and metallic end plates forming the top and botto-rh. walls thereof, passageways through said plates placing said arcing chambers in communication. with each other for conducting pressure gas through the several chambers, a set of pressure gas actuated.
  • each Contact set including a spring loaded pin Contact cooperative with a hollow nozzle Contact and separable therem from under the action of the pressure gas, said pin and noazle contacts being carried respectively by the metallic end walls of the chambers, an impedance arid seri-es connected auxiliary pressure gas operated switch means for each set oi load contacts, said impedemces being of relatively low magnitude to thereby draw a high oroler o control current, an insulating member housing each said impedance and switch means, said irla sulating members being supported between lateral extensions on said end plates that also connect each impedance and switch in parallel with the associated set of load contacts, and means ari-1 mittihg pressure gas to the several insulating members subsequent to the opening of said sets of load contacts to open said auxiliary switch mearis.
  • each of said auxiliary switch means is constituted by an arc gap in which the arc is interrupted by pressure gas to switch the impedance out of circuit with the associated set of load contacts.
  • each of said auxiliary switch means includes a nozzle contact
  • said end plates intermediate adjacent sets of load contacts include a pressure gas exhaust outlet
  • the lateral extensions oi such end plates include a pair of internal passageways, one of said passageways placing the nozzle contact of the switch means in the insulating member supported thereon in communication with the gas outlet therein, and the other passageway placing the blast chamber of which it forms the top end wall in communication with the associated insulating member.

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  • Circuit Breakers (AREA)
US582255A 1943-09-11 1945-03-12 Gas blast circuit breaker Expired - Lifetime US2453555A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH582835X 1943-09-11

Publications (1)

Publication Number Publication Date
US2453555A true US2453555A (en) 1948-11-09

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ID=4521614

Family Applications (1)

Application Number Title Priority Date Filing Date
US582255A Expired - Lifetime US2453555A (en) 1943-09-11 1945-03-12 Gas blast circuit breaker

Country Status (6)

Country Link
US (1) US2453555A (ru)
BE (1) BE457528A (ru)
CH (1) CH241758A (ru)
FR (1) FR909984A (ru)
GB (1) GB582835A (ru)
NL (1) NL62332C (ru)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561191A (en) * 1943-11-24 1951-07-17 Asea Ab Compressed air circuit breaker with a plurality of series connected breaking gaps
US2576132A (en) * 1949-08-18 1951-11-27 Westinghouse Electric Corp Protective system for series capacitors
US2581822A (en) * 1948-07-23 1952-01-08 Bbc Brown Boveri & Cie Gas blast circuit breaker having parallel connected impedance
US2596254A (en) * 1945-03-08 1952-05-13 Latour Andre Compressed air switch with delayed break connector
US2619563A (en) * 1945-08-07 1952-11-25 Kesselring Fritz Electromagnetic control device
US2627005A (en) * 1949-02-03 1953-01-27 Westinghouse Electric Corp Interrupter part of compressed-air breakers
US2658128A (en) * 1948-08-07 1953-11-03 Asea Ab Compressed air circuit breaker
US2729721A (en) * 1952-03-19 1956-01-03 Asea Ab High tension circuit breakers
US2747055A (en) * 1952-05-31 1956-05-22 Asea Ab High tension circuit breakers
US2748226A (en) * 1953-02-26 1956-05-29 Westinghouse Electric Corp Compressed-gas circuit interrupter
US2786117A (en) * 1954-02-17 1957-03-19 Asea Ab Air blast circuit breaker with parallel resistances
US2794886A (en) * 1954-03-02 1957-06-04 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
US2833896A (en) * 1954-11-24 1958-05-06 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
US2885514A (en) * 1955-04-14 1959-05-05 Bbc Brown Boveri & Cie Air-blast switch with auxiliary point of interruption for shunt resistances
US2911546A (en) * 1957-11-21 1959-11-03 Gen Electric Electric circuit breaker
US3030481A (en) * 1957-12-23 1962-04-17 S & C Electric Co Switch construction
US3054877A (en) * 1957-06-07 1962-09-18 Bbc Brown Boveri & Cie Compressed air actuated electric switch with power switching contacts and voltage disconnecting contacts
US3172980A (en) * 1959-06-13 1965-03-09 Bbc Brown Boveri & Cie Compressed air switch with multiple interruption
US4002867A (en) * 1972-11-01 1977-01-11 Westinghouse Electric Corporation Vacuum-type circuit interrupters with condensing shield at a fixed potential relative to the contacts
US4103128A (en) * 1974-06-13 1978-07-25 Mitsubishi Denki Kabushiki Kaisha Tank-type compressed-gas circuit-breaker having capacitance-supporting means

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974621C (de) * 1952-12-31 1961-03-02 Continental Elektro Ind Ag Hochspannungs-Leistungsschalter mit mehreren in Reihe geschalteten Schaltstellen
CH331003A (de) * 1955-02-16 1958-06-30 Bbc Brown Boveri & Cie Druckgasschalter mit Mehrfachunterbrechung
GB806232A (en) * 1956-04-14 1958-12-23 Asea Ab Improvements in electric air blast circuit breakers
US2979591A (en) * 1958-09-19 1961-04-11 Westinghouse Electric Corp Circuit interrupters
DE1215240B (de) * 1962-08-30 1966-04-28 Bbc Brown Boveri & Cie Druckgasschalter mit Mehrfachunterbrechung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190021449A (en) * 1900-11-27 1900-12-31 British Thomson-Houston Company Ltd The Improvements in Interrupting Devices for Electric Circuits
US1837812A (en) * 1927-06-28 1931-12-22 Condit Electrical Mfg Corp Electric switch and arcing members therefor
US1944402A (en) * 1931-02-09 1934-01-23 Clerc Andre Electric circuit-breaker with compressed gas blow-out
US2084979A (en) * 1930-01-27 1937-06-22 Westinghouse Electric & Mfg Co Circuit interrupter
US2117261A (en) * 1936-07-30 1938-05-10 Bbc Brown Boveri & Cie Electric circuit breaker
US2279536A (en) * 1938-05-27 1942-04-14 Bbc Brown Boveri & Cie Electric circuit breaker
USRE22298E (en) * 1941-06-14 1943-04-06 Gas blast circuit breaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190021449A (en) * 1900-11-27 1900-12-31 British Thomson-Houston Company Ltd The Improvements in Interrupting Devices for Electric Circuits
US1837812A (en) * 1927-06-28 1931-12-22 Condit Electrical Mfg Corp Electric switch and arcing members therefor
US2084979A (en) * 1930-01-27 1937-06-22 Westinghouse Electric & Mfg Co Circuit interrupter
US1944402A (en) * 1931-02-09 1934-01-23 Clerc Andre Electric circuit-breaker with compressed gas blow-out
US2117261A (en) * 1936-07-30 1938-05-10 Bbc Brown Boveri & Cie Electric circuit breaker
US2279536A (en) * 1938-05-27 1942-04-14 Bbc Brown Boveri & Cie Electric circuit breaker
USRE22298E (en) * 1941-06-14 1943-04-06 Gas blast circuit breaker

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561191A (en) * 1943-11-24 1951-07-17 Asea Ab Compressed air circuit breaker with a plurality of series connected breaking gaps
US2596254A (en) * 1945-03-08 1952-05-13 Latour Andre Compressed air switch with delayed break connector
US2619563A (en) * 1945-08-07 1952-11-25 Kesselring Fritz Electromagnetic control device
US2581822A (en) * 1948-07-23 1952-01-08 Bbc Brown Boveri & Cie Gas blast circuit breaker having parallel connected impedance
US2658128A (en) * 1948-08-07 1953-11-03 Asea Ab Compressed air circuit breaker
US2627005A (en) * 1949-02-03 1953-01-27 Westinghouse Electric Corp Interrupter part of compressed-air breakers
US2576132A (en) * 1949-08-18 1951-11-27 Westinghouse Electric Corp Protective system for series capacitors
US2729721A (en) * 1952-03-19 1956-01-03 Asea Ab High tension circuit breakers
US2747055A (en) * 1952-05-31 1956-05-22 Asea Ab High tension circuit breakers
US2748226A (en) * 1953-02-26 1956-05-29 Westinghouse Electric Corp Compressed-gas circuit interrupter
US2786117A (en) * 1954-02-17 1957-03-19 Asea Ab Air blast circuit breaker with parallel resistances
US2794886A (en) * 1954-03-02 1957-06-04 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
US2833896A (en) * 1954-11-24 1958-05-06 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
US2885514A (en) * 1955-04-14 1959-05-05 Bbc Brown Boveri & Cie Air-blast switch with auxiliary point of interruption for shunt resistances
US3054877A (en) * 1957-06-07 1962-09-18 Bbc Brown Boveri & Cie Compressed air actuated electric switch with power switching contacts and voltage disconnecting contacts
US2911546A (en) * 1957-11-21 1959-11-03 Gen Electric Electric circuit breaker
US3030481A (en) * 1957-12-23 1962-04-17 S & C Electric Co Switch construction
US3172980A (en) * 1959-06-13 1965-03-09 Bbc Brown Boveri & Cie Compressed air switch with multiple interruption
US4002867A (en) * 1972-11-01 1977-01-11 Westinghouse Electric Corporation Vacuum-type circuit interrupters with condensing shield at a fixed potential relative to the contacts
US4103128A (en) * 1974-06-13 1978-07-25 Mitsubishi Denki Kabushiki Kaisha Tank-type compressed-gas circuit-breaker having capacitance-supporting means

Also Published As

Publication number Publication date
NL62332C (ru)
CH241758A (de) 1946-03-31
FR909984A (fr) 1946-05-23
GB582835A (en) 1946-11-28
BE457528A (ru)

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