GB570511A - Improvements in gas-blast a.c. arc-rupturing devices - Google Patents

Improvements in gas-blast a.c. arc-rupturing devices

Info

Publication number
GB570511A
GB570511A GB2097943A GB2097943A GB570511A GB 570511 A GB570511 A GB 570511A GB 2097943 A GB2097943 A GB 2097943A GB 2097943 A GB2097943 A GB 2097943A GB 570511 A GB570511 A GB 570511A
Authority
GB
United Kingdom
Prior art keywords
chamber
vent
arc
blast
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
Application number
GB2097943A
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.)
Electr & Allied Ind Res Ass
Original Assignee
Electr & Allied Ind Res Ass
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 Electr & Allied Ind Res Ass filed Critical Electr & Allied Ind Res Ass
Priority to GB2097943A priority Critical patent/GB570511A/en
Publication of GB570511A publication Critical patent/GB570511A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

570,511. Gas-blast switches. WHITNEY, W. B., and BRITISH ELECTRICAL & ALLIED INDUSTRIES RESEARCH ASSOCIATION. Dec. 14, 1943, No. 20979. [Class 38 (v)] The chamber 12 formed of an insulating member 13 having a quartz or fibre liner 13a is closed below by a perforated metal plate 14 and above by a mushroom valve 15, in which is a vent 17. The vent-member may be of conducting material so as to serve as a contact. but, as shown, is of insulating material and receives a hollow contact 19 apertured at 2 to form a gas-vent. Either contact 18 or 19 may be fixed and the other movable, but the Specification refers also to both contacts being movable and vented. With this arrangement. excess pressures set up at current-maxima in the arcing chamber 12 are relieved through the valve 15; the extraneous blast, which may be derived from a reservoir, or mechanically, or from the firing of a cartridge, subsequently passing from feed chamber 23 through the perforations in plate 14 acting to scour the chamber 12 at current-zero. With a ratio of inletthroat area to vent-throat area of 1 : 2, the absolute pressure in the feed chamber, arcing chamber, and exhaust-side of the vent, assuming no arc and opened electrodes, are 5 : 2.2 : 1, whereas with an inlet-to-vent ratio 1 : 3, the pressures, are 7 : 2 : 1. The strength-of spring 16 is such that it requires 15lbs/ins.' above atmospheric to lift it, so allowing a margin of five atmospheres rise within chamber 12 in order to attain the feed-chamber pressure last set out. Various other numerical figures relating to the spring and valve, and a formula for the size of arcing chamber, are given. The Specification refers also to cross-blast arrangements, to the provision of isolating switches or otherwise enlarging the gap after arc-extinction, to blasts derived from gas-producing material heated by an arc in an auxiliary circuit, and to Specifications 278,764, [Class 38 (v)], 375,808, 398,213 and 401,013.
GB2097943A 1943-12-14 1943-12-14 Improvements in gas-blast a.c. arc-rupturing devices Expired GB570511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2097943A GB570511A (en) 1943-12-14 1943-12-14 Improvements in gas-blast a.c. arc-rupturing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2097943A GB570511A (en) 1943-12-14 1943-12-14 Improvements in gas-blast a.c. arc-rupturing devices

Publications (1)

Publication Number Publication Date
GB570511A true GB570511A (en) 1945-07-10

Family

ID=10155102

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2097943A Expired GB570511A (en) 1943-12-14 1943-12-14 Improvements in gas-blast a.c. arc-rupturing devices

Country Status (1)

Country Link
GB (1) GB570511A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154658A (en) * 1960-10-07 1964-10-27 Westinghouse Electric Corp Circuit interrupter with movable tubular contact as sole vent for interrupting chamber
US3214545A (en) * 1961-04-11 1965-10-26 Westinghouse Electric Corp Fluid-blast circuit interrupters with pressure-actuated fluid directors
US3254185A (en) * 1963-07-24 1966-05-31 Sigma Instruments Inc Pressure operated circuit breaker with arc extinguisher

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154658A (en) * 1960-10-07 1964-10-27 Westinghouse Electric Corp Circuit interrupter with movable tubular contact as sole vent for interrupting chamber
US3214545A (en) * 1961-04-11 1965-10-26 Westinghouse Electric Corp Fluid-blast circuit interrupters with pressure-actuated fluid directors
US3254185A (en) * 1963-07-24 1966-05-31 Sigma Instruments Inc Pressure operated circuit breaker with arc extinguisher

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