GB642176A - High tension compressed gas switch - Google Patents
High tension compressed gas switchInfo
- Publication number
- GB642176A GB642176A GB34402/47A GB3440247A GB642176A GB 642176 A GB642176 A GB 642176A GB 34402/47 A GB34402/47 A GB 34402/47A GB 3440247 A GB3440247 A GB 3440247A GB 642176 A GB642176 A GB 642176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- piston
- gas
- open
- isolator
- 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
- H01H33/302—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator for fluid insulated switchgear, wherein the insulating fluid is also the working fluid
Landscapes
- Circuit Breakers (AREA)
Abstract
642,176. Gas-blast circuit-breakers; protective cut-out arrangements. ETABLISSEMENTS MERLIN & GERIN. Dec. 29, 1947, No. 34402. Convention date, April 6, 1940. [Class 38(v)] The exhaust valve or valves of a gas-blast circuit-breaker comprising one or more movable contacts are arranged to be closed by the blast gas against spring bias shortly after the extinction of the arc, so maintaining the pressure in the contact chamber. Compressed gas is supplied to insulators 30 and passes through orifices 17 to move pistons 14 against the action of springs 16, the rear faces of the pistons being open to the atmosphere through distributers 19, thereby separating tubular contacts 2. After a small movement thereof, orifices 24 are closed so that the blast gas escapes through openings 5, 21 into the exhaust chambers, each of which contains a metal cooling grid, such as 25. The exhaust valves 6, 22, are thereby urged to close but their inertia is so arranged that the arc is extinguished before they do so. An isolator 13, Fig. 5, may then be opened and the insulators 30 connected to atmosphere by means not shown, in order to close the contacts. Alternatively, the distributers 19 may be moved by a cam 39 on a rod 40 operated by a piston 43, so as to supply compressed gas to the rear of the pistons 14, so that springs 16 reclose the contacts. In this case, a further slight blowing will occur when the orifices 24 are uncovered, so as to relieve the pressure on valves 6, 22 which re-open. The distributers 19 may, alternatively, be manually, mechanically or electrically operated. In Fig. 1 (not shown), a single movable contact co-operates with a fixed nozzle contact in a generally verticallyaranged structure. In a modification (Fig. 4, not shown), the hood 27 of the exhaust chamber is spring-loaded and lifted by the exhaust gases. In Fig. 5, a cock 57 is closed or open, respectively, according as to whether the isolator 13 is to open or remain closed. In the former case, on overload in the line 48, a relay 50 is energized over a current-transformer 49 to close contacts 81, 82, thereby energizing the electro-magnetic valve 53 which opens and causes a main valve 52 to open. Compressed gas is thus supplied to the circuit-breaker 47 whose contacts open and exhaust valves eventually close. When the arc is extinguished, coil 50 is de-energized, but valve 53 is held open by the energization of its coil over maintaining contact 80 and normally-closed contact 71. After a time-delay determined by an adjustable retarding device 60, a piston 58 moves to the right to supply gas through pipes 54, 76 to cause opening of isolator 13 by piston 74. At the same time contacts 77 are opened and valve 53 closes to stop the gas supply and exhaust the circuit-breaker to atmosphere at 52. The circuit-breaker contacts therefore reclose, leaving the isolator open, the latter being closed when desired by pressure applied to the left-hand side of piston 74 by means not shown. If the isolator is to remain closed on overload, the circuitbreaker contacts are opened as before, but a piston 59 is operated before piston 58 by gas supplied through a timing device 61 which acts more quickly than the device 60. Gas therefore passes through pipes 65, 63 and causes piston valve 62 to vent the left-hand side of piston 58 to atmosphere so preventing operation of the isolator. At the same time, gas through pipe 66 moves the piston 43 to the right, thereby operating distributers 19 and causing the circuitbreaker contacts to close. If the fault has been cleared, contact 71 is opened by a fluid-pressure capsule 70 after a time determined by a retarding device 72, thereby closing valves 53, 52. If the fault persists, however, a valve 64 is opened by its coil which is energized over contact 69 which has been closed by pressure in pipe 66. The pipes 63, 66 are thereby vented to atmosphere and piston 43 moves to the left, so that the circuit-breaker contacts are allowed to re-open. The left-hand side of piston 58 is also exposed to pressure and the isolator is opened. Contacts 77 are opened so that valves 53, 64 are de-energized and close, returning the system to its original state.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR866412T | 1940-04-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB642176A true GB642176A (en) | 1950-08-30 |
Family
ID=9344925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34402/47A Expired GB642176A (en) | 1940-04-06 | 1947-12-29 | High tension compressed gas switch |
Country Status (3)
Country | Link |
---|---|
US (2) | US2574334A (en) |
FR (1) | FR866412A (en) |
GB (1) | GB642176A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1106838B (en) * | 1957-01-22 | 1961-05-18 | Westinghouse Electric Corp | Electrical switch with series-connected interruption devices |
EP1835520A1 (en) | 2006-03-14 | 2007-09-19 | ABB Technology AG | Switching chamber for gasisolated high voltage switch |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL29810C (en) * | 1950-03-10 | Merlin Gerin | ||
DE945166C (en) * | 1951-02-28 | 1959-07-30 | Licentia Gmbh | Electric circuit breaker, in particular switch, with arc extinguishing by a flowing pressure medium, such as compressed gas |
US2828392A (en) * | 1953-02-11 | 1958-03-25 | Leopold Otto | High voltage switching arrangement |
FR1080200A (en) * | 1953-06-17 | 1954-12-07 | Merlin Gerin | Circuit breaker contact protection device |
US2997563A (en) * | 1955-05-27 | 1961-08-22 | Westinghouse Canada Ltd | Circuit interrupters |
US2886672A (en) * | 1955-10-05 | 1959-05-12 | Asea Ab | Air blast circuit breaker |
US2881291A (en) * | 1955-12-15 | 1959-04-07 | Asea Ab | Air blast circuit breaker |
US2965735A (en) * | 1956-06-07 | 1960-12-20 | Westinghouse Electric Corp | Compressed-gas circuit interrupter |
BE557909A (en) * | 1956-07-10 | Merlin Gerin | ||
US2999143A (en) * | 1956-11-21 | 1961-09-05 | Westinghouse Electric Corp | Compressed-gas circuit interrupter |
US2905793A (en) * | 1957-06-21 | 1959-09-22 | Ite Circuit Breaker Ltd | Differential piston for recirculating gas blast interrupters |
US2897324A (en) * | 1957-10-09 | 1959-07-28 | Gen Electric | Fluid blast circuit interrupter |
DE1203855B (en) * | 1960-02-27 | 1965-10-28 | Asea Ab | Device for braking the opening movement of the moving contact of a compressed air switch |
US3133176A (en) * | 1960-08-08 | 1964-05-12 | Gen Electric | Gas blast circuit breaker |
GB936545A (en) * | 1960-12-15 | 1963-09-11 | Asea Ab | Air blast electric circuit breaker |
US3178546A (en) * | 1961-12-04 | 1965-04-13 | Gen Electric | Orifice structure for circuit interrupter of fluid blast type |
BE625691A (en) * | 1961-12-07 | |||
CH403010A (en) * | 1963-09-20 | 1965-11-30 | Bbc Brown Boveri & Cie | Gas pressure switch |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419446A (en) * | 1947-04-22 | Electric circuit breaker | ||
US1645288A (en) * | 1922-04-13 | 1927-10-11 | Westinghouse Electric & Mfg Co | Throttling device |
NL34469C (en) * | 1931-07-06 | |||
BE447360A (en) * | 1938-05-27 | |||
BE437053A (en) * | 1938-11-17 | |||
US2275885A (en) * | 1940-01-30 | 1942-03-10 | Gen Electric | Electric circuit breaker |
US2253196A (en) * | 1940-09-28 | 1941-08-19 | Gen Electric | Gas blast electric circuit breaker |
GB570496A (en) * | 1943-08-09 | 1945-07-10 | British Thomson Houston Co Ltd | Improvements in gas blast electric circuit breakers |
BE469806A (en) * | 1945-12-18 |
-
1940
- 1940-04-06 FR FR866412D patent/FR866412A/en not_active Expired
-
1947
- 1947-07-23 US US763024A patent/US2574334A/en not_active Expired - Lifetime
- 1947-12-29 GB GB34402/47A patent/GB642176A/en not_active Expired
-
1951
- 1951-10-01 US US249044A patent/US2686243A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1106838B (en) * | 1957-01-22 | 1961-05-18 | Westinghouse Electric Corp | Electrical switch with series-connected interruption devices |
EP1835520A1 (en) | 2006-03-14 | 2007-09-19 | ABB Technology AG | Switching chamber for gasisolated high voltage switch |
Also Published As
Publication number | Publication date |
---|---|
FR866412A (en) | 1941-08-12 |
US2686243A (en) | 1954-08-10 |
US2574334A (en) | 1951-11-06 |
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