GB818521A - Improvements in and relating to gas-blast electric circuit breakers - Google Patents
Improvements in and relating to gas-blast electric circuit breakersInfo
- Publication number
- GB818521A GB818521A GB3507054A GB3507054A GB818521A GB 818521 A GB818521 A GB 818521A GB 3507054 A GB3507054 A GB 3507054A GB 3507054 A GB3507054 A GB 3507054A GB 818521 A GB818521 A GB 818521A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- open
- piston
- blast
- pressure
- 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
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
- H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
Landscapes
- Circuit Breakers (AREA)
Abstract
818,521. Gas-blast switches. ENGLISH ELECTRIC CO. Ltd. Dec. 2, 1955 (Dec. 3, 1954], No. 35070/54. Class 38 (5). A gas-blast switch 3 has means to maintain the blast valve 6 open once it has opened during an opening operation, the means becoming inoperative only when an isolating contact element of the switch has completed at least a major part of its movement to an open position. When the switch is to be opened, the coil 10a of a pilot valve 10 is energized moving the valve to the left and admitting air under pressure to a valve 9a. This causes valves 9a and 9b to move down to open valve 9b and admit pressure to the left-hand side of a piston 8a. The piston 8a moves a two-way valve 8 to the right to cut off the air supply to the space below a piston 6a and to exhaust this space to the atmosphere. The pressure in the chamber la moves the piston 6a down to open the blast-valve 6. Pressure air entering the column 1 can now act through a non-return valve 12, a cut-off valve 14, a pipe 11 and a non-return valve 13 on the valve 9a to maintain the valves 9a, 9b in their lower position, so maintaining the valve 6 open until an isolating contact arm 15 has been moved sufficiently to close the cut-off valve 14. At this instant the coil 10a would normally be de-energized e.g. by the opening of auxiliary contacts associated with the arm 15. In a multiphase arrangement the pipes between the valves 12, 14 associated with the respective phases may be interconnected by a pipe 16 to ensure that the switch of one phase cannot remain closed while the others open. In Fig. 2 (not shown), the pipe 11 may be connected so that the maintaining pressure acts directly on to the piston 8a. In a further arrangement similar to that of Fig. 1, the maintaining pressure is derived from the pipe between the valve 9b and cylinder 8b, Fig. 3 (not shown). The isolating contact may be an arm 15 as shown, but it could be one of the main interrupting contacts which, by continued movement, establishes an isolating gap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3507054A GB818521A (en) | 1954-12-03 | 1954-12-03 | Improvements in and relating to gas-blast electric circuit breakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3507054A GB818521A (en) | 1954-12-03 | 1954-12-03 | Improvements in and relating to gas-blast electric circuit breakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB818521A true GB818521A (en) | 1959-08-19 |
Family
ID=10373438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3507054A Expired GB818521A (en) | 1954-12-03 | 1954-12-03 | Improvements in and relating to gas-blast electric circuit breakers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB818521A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1261929B (en) * | 1961-05-19 | 1968-02-29 | Merlin Gerin | Pressurized gas switch with circulation flow |
-
1954
- 1954-12-03 GB GB3507054A patent/GB818521A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1261929B (en) * | 1961-05-19 | 1968-02-29 | Merlin Gerin | Pressurized gas switch with circulation flow |
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