GB475370A - Improvements in or relating to alternating current electric switches - Google Patents
Improvements in or relating to alternating current electric switchesInfo
- Publication number
- GB475370A GB475370A GB1644736A GB1644736A GB475370A GB 475370 A GB475370 A GB 475370A GB 1644736 A GB1644736 A GB 1644736A GB 1644736 A GB1644736 A GB 1644736A GB 475370 A GB475370 A GB 475370A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arc
- rod
- nozzle
- current
- deionizing
- 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
- H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
475,370. Fluid - blast switches. GENERAL ELECTRIC CO., Ltd., and RUDENBERG, R. June 12, 1936, No. 16447. [Class 38 (v)] In an A.C. switch a stream of air or other gas without strong deionizing properties traverses the arc-gap during circuit-interruption and, in addition, when the current to be interrupted is relatively larger a strongly deionizing medium is caused to act on the arc. In Fig. 1, when the rod 2 is withdrawn from the nozzle 1 to open circuit, a compressed-air blast flows from container 3 past main valve 4 into a ducting 7, from which a further ducting 8 leads to the top of a water vessel 6, the bottom of which communicates over a distributer with small ducts 5 in the nozzle 1. The ducting 8 has an electromagnetically-operated valve 9 which is opened by means of a current transformer 10 in the main circuit of the switch when the current is large, so causing water to be sprayed into the arc-gap to deionize the arc. The extent of opening of valve 9 may depend on the value of the large current. In Fig. 2 (not shown), the nozzle-ducts communicate with a hydrogen container over a valve which is controlled by a piston acted on by the backpressure in the nozzle when the current is large. Application of the deionizing medium may alternatively be controlled by air-velocity through the nozzle or by the temperature adjacent the arc. In Fig. 3, the rod 19 extends through an oil or water vessel 21 and with low currents, it is withdrawn to position A and air alone is provided ; with large currents the rod is withdrawn to position B under the liquid level so that the liquid is vaporized. In Fig. 4 (not shown), the rod is hollow and provided with a piston which, with large currents, forces liquid through the bore of the rod and into the arc-gap. The different strokes of the contact rod may be effected by -magnetic means. Instead of hydrogen, a fluid from which hydrogen is evolved in the arc, or a solid in powder form, may be used as the deionizing medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1644736A GB475370A (en) | 1936-06-12 | 1936-06-12 | Improvements in or relating to alternating current electric switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1644736A GB475370A (en) | 1936-06-12 | 1936-06-12 | Improvements in or relating to alternating current electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB475370A true GB475370A (en) | 1937-11-18 |
Family
ID=10077478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1644736A Expired GB475370A (en) | 1936-06-12 | 1936-06-12 | Improvements in or relating to alternating current electric switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB475370A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3257533A (en) * | 1965-04-23 | 1966-06-21 | Westinghouse Electric Corp | Fluid-blast circuit interrupters with two selectively-operated fluid-blast sources |
| US3406269A (en) * | 1965-02-26 | 1968-10-15 | Westinghouse Electric Corp | Fluid-blast circuit breakers having means for increasing the density of the fluid during interruption |
| US3418440A (en) * | 1965-09-14 | 1968-12-24 | Gen Electric | Gas-blast circuit breaker |
-
1936
- 1936-06-12 GB GB1644736A patent/GB475370A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3406269A (en) * | 1965-02-26 | 1968-10-15 | Westinghouse Electric Corp | Fluid-blast circuit breakers having means for increasing the density of the fluid during interruption |
| US3257533A (en) * | 1965-04-23 | 1966-06-21 | Westinghouse Electric Corp | Fluid-blast circuit interrupters with two selectively-operated fluid-blast sources |
| US3418440A (en) * | 1965-09-14 | 1968-12-24 | Gen Electric | Gas-blast circuit breaker |
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