GB537603A - Improvements in liquid blast electric circuit breakers - Google Patents

Improvements in liquid blast electric circuit breakers

Info

Publication number
GB537603A
GB537603A GB14179/40A GB1417940A GB537603A GB 537603 A GB537603 A GB 537603A GB 14179/40 A GB14179/40 A GB 14179/40A GB 1417940 A GB1417940 A GB 1417940A GB 537603 A GB537603 A GB 537603A
Authority
GB
United Kingdom
Prior art keywords
arc
pressure
plate
contact
valve
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
GB14179/40A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB537603A publication Critical patent/GB537603A/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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/92—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being liquid, e.g. oil
    • 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
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Breakers (AREA)
  • Circuit Breakers (AREA)

Abstract

537,603. Liquid-blast switches. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 13, 1940, No. 14179. Convention date, Sept. 13, 1939. [Class 38 (v)] In a circuit-breaker of the "impulse" type a valve is interposed between the piston and arc-chamber so that if the arc-pressure is greater than the piston-pressure, the arc-pressure closes the valve, thus ensuring extinction of the arc by its own pressure. The piston may be arranged and operated as described in Specification 461,699. The contact-structure comprises a fixed contact 9 directly mounted on the metal oil-container 1, a floating contact 12 on a plate 13 biassed by springs 14 against the base of the insulating baffle 15, and a movable contact 5 guided in an insulating bushing 6, the arrangement being that a short arc initially drawn between 9, 12 generates a pressure for supplementing the impulse blast through passage 16 on to the arc subsequently drawn between 5, 12. The valve comprises a plate 27 with apertures 28<1> therein adapted to be closed by discs 28, which are guided on posts 29 and may be six in number arranged equidistantly around the contact 9. The posts 29 also secure a metal plate 30 having extensions 30<1>, whereby the electromagnetic forces set up if the arc tends to bow outwardly and strike the valve plate 27, oppose the forces tending to bow the arc, and thereby centre it and keep it short. In order to keep arc-gases out of the blast through passage 16, a baffle is provided in the form of a spout 32 depending from baffle 15 and a semicircular ridge 33 on the plate 30.
GB14179/40A 1939-09-13 1940-09-13 Improvements in liquid blast electric circuit breakers Expired GB537603A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US294642A US2271989A (en) 1939-09-13 1939-09-13 Electric circuit breaker

Publications (1)

Publication Number Publication Date
GB537603A true GB537603A (en) 1941-06-27

Family

ID=23134303

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14179/40A Expired GB537603A (en) 1939-09-13 1940-09-13 Improvements in liquid blast electric circuit breakers

Country Status (2)

Country Link
US (1) US2271989A (en)
GB (1) GB537603A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150135B (en) * 1959-05-29 1963-06-12 Siemens Ag Fluid switch

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462708A (en) * 1945-01-19 1949-02-22 Westinghouse Electric Corp Circuit interrupter
US2518195A (en) * 1946-07-19 1950-08-08 Gen Electric High-voltage electric circuit interrupter
US2606262A (en) * 1949-07-27 1952-08-05 Gen Electric Electric circuit interrupter
US2621273A (en) * 1950-04-28 1952-12-09 Westinghouse Electric Corp Liquid-break circuit interrupter
US2640897A (en) * 1951-01-03 1953-06-02 Gen Electric Liquid break circuit breaker
US2760032A (en) * 1952-09-26 1956-08-21 Westinghouse Electric Corp Circuit interrupters
US3313901A (en) * 1964-11-20 1967-04-11 Ite Circuit Breaker Ltd Single break oil circuit breaker structure having dual valve structure
US4093837A (en) * 1975-07-31 1978-06-06 Westinghouse Electric Corp. Oil circuit-breaker pump-assembly with improved shunting contact structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150135B (en) * 1959-05-29 1963-06-12 Siemens Ag Fluid switch

Also Published As

Publication number Publication date
US2271989A (en) 1942-02-03

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