GB575887A - Improvements in gas blast high voltage electric circuit breakers - Google Patents

Improvements in gas blast high voltage electric circuit breakers

Info

Publication number
GB575887A
GB575887A GB7521/44A GB752144A GB575887A GB 575887 A GB575887 A GB 575887A GB 7521/44 A GB7521/44 A GB 7521/44A GB 752144 A GB752144 A GB 752144A GB 575887 A GB575887 A GB 575887A
Authority
GB
United Kingdom
Prior art keywords
gas
nozzles
throat
per cent
class
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
Application number
GB7521/44A
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.)
FERGUSON PAILIN Ltd
Original Assignee
FERGUSON PAILIN Ltd
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 FERGUSON PAILIN Ltd filed Critical FERGUSON PAILIN Ltd
Priority to GB7521/44A priority Critical patent/GB575887A/en
Priority to US586216A priority patent/US2481996A/en
Publication of GB575887A publication Critical patent/GB575887A/en
Expired legal-status Critical Current

Links

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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle

Landscapes

  • Circuit Breakers (AREA)

Abstract

575,887. Gas-blast circuit-breakers. FERGUSON, PAILIN, Ltd., GRUNEWALD, F., and DAKIN, E. M. April 22, 1944, No. 7521. [Class 38 (v)] A gas-blast high-voltage circuit-breaker has nozzle contacts 4, 5 disposed in an arcing chamber 2 formed by insulating member 3. The nozzles 4, 5 which, in this embodiment, are respectively movable and fixed, are each of the convergent-divergent type. The convergent parts 32, 35 have a length l not less than, and preferably more than, the throat diameter d, and an inlet diameter D, the maximum separation of the nozzles being equal to a=D/2+ up to 15 per cent. for vena contracta. The flow areas across the nozzle entrances are so much larger than the throat areas, that the pressure in the entrances is at least 40 per cent. higher than at the throat, while the gas speed is at least 25 per cent. of that at the throat. Contact 4 has a flange 8 which is moved in cylinder 9, against spring 11, when the gas blast is supplied from cylinder 19. An isolating switch 23, pivotally connected at 24 to the main switch and in series therewith, is opened by a rotatable shaft 28, connected to the pressure responsive mechanism 29 when the arc is quenched. Contacts 4, 5 with raised non- oxidising surfaces 38, 39 have electrostatic stress distributors 40, 41 respectively. The gasblast moves the contact 4, when the pressure in chamber 2 reaches 30 per cent. of its maximum value, thereby stretching the arc which settles on the divergent parts 34, 37 of the nozzles, or on auxiliary electrodes 47, 48 if provided. In Fig. 3 (not shown), the flange 40 on contact 4 is replaced by a surrounding fixed electrode shaped to form a gas scoop at its end. In addition, condenser layers are embedded in the member 3 which has a protecting metal cylinder on its inner surface. In Fig. 4 (not shown), both nozzles are movable in stationary surrounding metal cylinders, each of which carries a short insulating extension in its end. A resistance may be connected across one of the interrupting gaps in any of the above embodiments. Specifications 26694/01, 7736/02, 13852/02, [all in Class 38], and 278,764, [Class 38 (v)], are referred to.
GB7521/44A 1944-04-22 1944-04-22 Improvements in gas blast high voltage electric circuit breakers Expired GB575887A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7521/44A GB575887A (en) 1944-04-22 1944-04-22 Improvements in gas blast high voltage electric circuit breakers
US586216A US2481996A (en) 1944-04-22 1945-04-02 Air blast circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7521/44A GB575887A (en) 1944-04-22 1944-04-22 Improvements in gas blast high voltage electric circuit breakers

Publications (1)

Publication Number Publication Date
GB575887A true GB575887A (en) 1946-03-08

Family

ID=9834715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7521/44A Expired GB575887A (en) 1944-04-22 1944-04-22 Improvements in gas blast high voltage electric circuit breakers

Country Status (2)

Country Link
US (1) US2481996A (en)
GB (1) GB575887A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185802A (en) * 1960-07-18 1965-05-25 Merlin Gerin Gas blast circuit breakers having at least one tubular contact
US4268732A (en) * 1977-06-24 1981-05-19 Institutul De Cercetari Si Modernizari Energetice Arc quenching chamber for high breaking capacity circuit breakers

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE471742A (en) * 1944-02-24
US2604562A (en) * 1949-01-29 1952-07-22 Gen Electric Electric circuit interrupter
US2678983A (en) * 1950-05-16 1954-05-18 Westinghouse Electric Corp Compressed gas circuit interrupter
US2737556A (en) * 1951-04-27 1956-03-06 Westinghouse Electric Corp Circuit interrupter
US2997563A (en) * 1955-05-27 1961-08-22 Westinghouse Canada Ltd Circuit interrupters
US2999143A (en) * 1956-11-21 1961-09-05 Westinghouse Electric Corp Compressed-gas circuit interrupter
US2978560A (en) * 1958-03-20 1961-04-04 Ite Circuit Breaker Ltd Interrupter unit for telescoping blade switch
CH410110A (en) * 1964-07-24 1966-03-31 Bbc Brown Boveri & Cie Compressed gas switch with at least one switching point located inside a hollow insulator
DE1249972B (en) * 1964-08-24
JPS528505B1 (en) * 1970-02-06 1977-03-09
US4144426A (en) * 1977-02-15 1979-03-13 Westinghouse Electric Corp. Single barrel puffer circuit interrupter with downstream gas coolers
US20140174895A1 (en) * 2012-12-20 2014-06-26 Abb Technology Ag Contact arrangement for high voltage switchgear with contact arrangement

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1759419A (en) * 1926-03-02 1930-05-20 American Brown Boveri Electric Condenser bushing
US1937482A (en) * 1928-09-18 1933-11-28 Ruppel Sigwart Compressed gas switch
US1910068A (en) * 1929-04-27 1933-05-23 Westinghouse Electric & Mfg Co Circuit interrupter
DE601563C (en) * 1930-01-12 1934-08-18 Emil Lange Switch with extinguishing of the arc by a flow of compressed gas
DE606982C (en) * 1931-02-23 1934-12-14 Erwin Marx Dr Ing Device for one-time arc extinguishing with the help of a gaseous, flowing extinguishing agent and with hollow electrodes
FR754972A (en) * 1932-04-30 1933-11-17 Bbc Brown Boveri & Cie Switch refinements
DE687791C (en) * 1932-06-04 1940-02-06 Const Electr De Delle Sa Atel Electric switch with arc extinguishing by flowing pressurized gas
FR780147A (en) * 1933-11-17 1935-04-19 Siemens Ag Switch for alternating current
US2133938A (en) * 1933-12-08 1938-10-18 Strauss Frida Electric switch
US2155846A (en) * 1938-01-27 1939-04-25 Ohio Brass Co Insulator
BE467248A (en) * 1940-04-15
US2313159A (en) * 1941-01-09 1943-03-09 Westinghouse Electric & Mfg Co Circuit interrupter
US2306242A (en) * 1941-07-25 1942-12-22 Gen Electric Gas blast electric circuit breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185802A (en) * 1960-07-18 1965-05-25 Merlin Gerin Gas blast circuit breakers having at least one tubular contact
US4268732A (en) * 1977-06-24 1981-05-19 Institutul De Cercetari Si Modernizari Energetice Arc quenching chamber for high breaking capacity circuit breakers

Also Published As

Publication number Publication date
US2481996A (en) 1949-09-13

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