GB659263A - Improvements in air blast electric circuit breakers - Google Patents
Improvements in air blast electric circuit breakersInfo
- Publication number
- GB659263A GB659263A GB20555/49A GB2055549A GB659263A GB 659263 A GB659263 A GB 659263A GB 20555/49 A GB20555/49 A GB 20555/49A GB 2055549 A GB2055549 A GB 2055549A GB 659263 A GB659263 A GB 659263A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- blast
- air
- pressure
- 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
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
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Multiple-Way Valves (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
659,263. Air-blast, switches. ALLMANNASVENSKA ELEKTRTSKA AKTIEBOLAG'ET. Aug. 8, 1949, No. 20555. Convention date, Aug. 9, 1948. [Class 38(v).] To ensure an adequate blast pressure at the contacts of an airblast switch having one or more pairs of contacts 10, 11 and a blast valve 2 adjacent the compressed air container 1, the delivery pipe or channel 4, 8 to the contacts has a practically constant crosssection and a length between the valve and the contacts of not less than 2.5 metres, the contacts being opened when the air. pressure wave formed initially when the blast valve is opened, has been reflected from the closed end 14 of the pipe or channel. It is stated that this arrangement enables the arc extinction at the contacts to occur at an air blast pressure which is higher than the static air pressure in the container. The moving contact or contacts may be operated mechanically, or pneumatically by the blast pressure or by air in a separate pipe line 5. The blast valve 2 may have an effective cross sectional area larger than that of the channel 4.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE659263X | 1948-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB659263A true GB659263A (en) | 1951-10-17 |
Family
ID=20314276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20555/49A Expired GB659263A (en) | 1948-08-09 | 1949-08-08 | Improvements in air blast electric circuit breakers |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR992381A (en) |
| GB (1) | GB659263A (en) |
-
1949
- 1949-08-08 GB GB20555/49A patent/GB659263A/en not_active Expired
- 1949-08-09 FR FR992381D patent/FR992381A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR992381A (en) | 1951-10-17 |
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