GB1438590A - Electrical circuit breaker - Google Patents

Electrical circuit breaker

Info

Publication number
GB1438590A
GB1438590A GB5720073A GB5720073A GB1438590A GB 1438590 A GB1438590 A GB 1438590A GB 5720073 A GB5720073 A GB 5720073A GB 5720073 A GB5720073 A GB 5720073A GB 1438590 A GB1438590 A GB 1438590A
Authority
GB
United Kingdom
Prior art keywords
gas
breaker
dec
spring
piston
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
GB5720073A
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Publication of GB1438590A publication Critical patent/GB1438590A/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
    • H01H33/884—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 with variable-area piston
    • 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
    • H01H33/905—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 compression volume being formed by a movable cylinder and a semi-mobile piston

Abstract

1438590 Gas-blast circuit-breaker FUJI ELECTRIC CO Ltd 10 Dec 1973 [8 Dec 1972] 57200/73 Heading H1N The quenching-gas compression cylinder 7 of a gas-blast circuit-breaker is formed with two portions of different cross-section A and B. Two corresponding pistons 8 and 9 are provided, the smaller 8 being fixed and the larger 9 being movable, but biased by a spring 10. During opening, the movable contact 2 is drawn down taking the cylinder 7 with it, the pressure increase in B being balanced by the spring 10 until the shoulder 12 appraches the piston 9. As the fixed piston 8 enters the chamber A the compressed gas from B is forced into A via ports 11. This arrangement is stated to provide a higher pressure for a given stroke (as illustrated by the curves of Fig. 4, not shown) thus enabling the arc-quenching time to be shortened.
GB5720073A 1972-12-08 1973-12-10 Electrical circuit breaker Expired GB1438590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12318672A JPS5347909B2 (en) 1972-12-08 1972-12-08

Publications (1)

Publication Number Publication Date
GB1438590A true GB1438590A (en) 1976-06-09

Family

ID=14854307

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5720073A Expired GB1438590A (en) 1972-12-08 1973-12-10 Electrical circuit breaker

Country Status (6)

Country Link
JP (1) JPS5347909B2 (en)
DE (1) DE2361687A1 (en)
FR (1) FR2209998A1 (en)
GB (1) GB1438590A (en)
IT (1) IT1002215B (en)
NL (1) NL7316768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114068241A (en) * 2020-08-07 2022-02-18 国家电网有限公司 Arc extinguish chamber and circuit breaker

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987262A (en) * 1975-05-12 1976-10-19 Westinghouse Electric Corporation Puffer-type gas-blast circuit-interrupter having variable-area stationary composite piston structure
DE3322597A1 (en) * 1983-05-31 1984-12-06 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau EXHAUST GAS SWITCH
FR2559615B1 (en) * 1984-02-15 1987-02-27 Alsthom Atlantique COMPRESSED GAS CIRCUIT BREAKER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114068241A (en) * 2020-08-07 2022-02-18 国家电网有限公司 Arc extinguish chamber and circuit breaker
CN114068241B (en) * 2020-08-07 2024-02-27 国家电网有限公司 Arc extinguishing chamber and circuit breaker

Also Published As

Publication number Publication date
IT1002215B (en) 1976-05-20
JPS4978886A (en) 1974-07-30
JPS5347909B2 (en) 1978-12-25
FR2209998A1 (en) 1974-07-05
DE2361687A1 (en) 1974-06-12
NL7316768A (en) 1974-06-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee