GB570511A - Improvements in gas-blast a.c. arc-rupturing devices - Google Patents
Improvements in gas-blast a.c. arc-rupturing devicesInfo
- 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
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
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.
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)
| 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 |
-
1943
- 1943-12-14 GB GB2097943A patent/GB570511A/en not_active Expired
Cited By (3)
| 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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