GB837825A - Improvements relating to air-blast electrical circuit-breakers - Google Patents
Improvements relating to air-blast electrical circuit-breakersInfo
- Publication number
- GB837825A GB837825A GB21511/57A GB2151157A GB837825A GB 837825 A GB837825 A GB 837825A GB 21511/57 A GB21511/57 A GB 21511/57A GB 2151157 A GB2151157 A GB 2151157A GB 837825 A GB837825 A GB 837825A
- Authority
- GB
- United Kingdom
- Prior art keywords
- orifice
- air
- cylinder
- atmosphere
- moving contact
- 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)
- Separation By Low-Temperature Treatments (AREA)
Abstract
837,825. Gas-blast switches. ETABLISSEMENTS MERLIN & GERIN. July 8, 1957 [July 10, 1956], No. 21511/57. Class 38 (5). A pneumatically opened air-blast circuitbreaker has its contacts pressed together by pneumatic means at the start of an opening operation. In Fig. 1, the pressure in the arc extinction chamber enters cylinders 7, 10 through orifices 9, 11, to act on the pistons 3, 2 of the moving contact 1. Although the cylinder 7 has a small orifice 8 open to the atmosphere the orifice 9 is so related to the orifice 11 that the initial effect is to urge the contact 1 upwards until the pressure above the piston 2 builds up so as to overcome the opposing air pressure and spring force and open the contacts. As the piston 2 moves downwards it uncovers further orifices 14 allowing greater air flow into the cylinder to accelerate the movement. During the latter part of its movement the piston 3 closes the orifice 9 so as to form an air buffer in the bottom of the cylinder 7 since air can only escape slowly through the orifice 8. On closing the air can escape from the cylinder 10 through non-return valves 16, 17. The fixed contact 4 is hollow and vented to the atmosphere. In Fig. 2, the hollow moving contact 1 is vented to atmosphere via holes 18, passage 19 and an orifice 20 which is sealed after arc-extinction by a slow-acting valve 21, 22, 23 operated by the arc-chamber pressure. In Fig. 3, the hollow stem 36 of the moving contact 1 is vented to atmosphere through holes 41, 20, and the cap 21 is arranged to seal the hole 20 in the circuit-open position. The moving contact 1 passes through a fixed cap 37, preferably of insulating material, and a second fixed cap 38 of metal, which acts as an arcing tip and electrostatic shield. In Fig. 4 (not shown) the orifice 9 is at the lower end of the cylinder 7 and has a non-return valve. Specification 837,824 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1059533X | 1956-07-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB837825A true GB837825A (en) | 1960-06-15 |
Family
ID=9599139
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21511/57A Expired GB837825A (en) | 1956-07-10 | 1957-07-08 | Improvements relating to air-blast electrical circuit-breakers |
GB21512/57A Expired GB837824A (en) | 1956-07-10 | 1957-07-08 | Improvements relating to air-blast electric circuit-breakers |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21512/57A Expired GB837824A (en) | 1956-07-10 | 1957-07-08 | Improvements relating to air-blast electric circuit-breakers |
Country Status (6)
Country | Link |
---|---|
US (1) | US2919329A (en) |
BE (1) | BE557909A (en) |
CH (2) | CH341549A (en) |
DE (1) | DE1059533B (en) |
FR (1) | FR1155626A (en) |
GB (2) | GB837825A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1221332B (en) * | 1964-08-21 | 1966-07-21 | Bbc Brown Boveri & Cie | Gas pressure switch |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB884854A (en) * | 1957-07-01 | 1961-12-20 | Ass Elect Ind | Improvements in air or gas blast electric circuit-breakers |
DE1072679B (en) * | 1958-03-26 | 1960-01-07 | ||
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 |
GB936545A (en) * | 1960-12-15 | 1963-09-11 | Asea Ab | Air blast electric circuit breaker |
DE1212189B (en) * | 1962-11-09 | 1966-03-10 | Bbc Brown Boveri & Cie | Pulse-like switching device for compressed gas switch |
DE19638948A1 (en) * | 1996-09-16 | 1998-03-19 | Siemens Ag | Mobile circuit breaker with a blowout damper |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US798082A (en) * | 1903-02-07 | 1905-08-29 | Otis Elevator Co | Automatic controller for electric circuits. |
GB319277A (en) * | 1928-09-19 | 1930-09-18 | Gen Electric | Improvements in and relating to pneumatically operated electric switches |
DE596874C (en) * | 1928-10-03 | 1934-05-11 | Sigwart Ruppel Dipl Ing | Control for switch with arc extinguishing by flowing pressurized gas |
GB432453A (en) * | 1934-03-28 | 1935-07-26 | Gen Electric Co Ltd | Improvements in electric switches or circuit breakers of the kind provided with separable electrodes, the arc gap between which is adapted to be swept by a stream of fluid |
BE417665A (en) * | 1935-10-10 | |||
CH214012A (en) * | 1939-11-01 | 1941-03-31 | Oerlikon Maschf | Electric switch with arc quenching and movement of the nozzle contact by a flowing pressure medium. |
FR866412A (en) * | 1940-04-06 | 1941-08-12 | Merlin Gerin | High voltage compressed gas switch |
BE490328A (en) * | 1948-07-31 | |||
NL94998C (en) * | 1952-05-31 |
-
0
- BE BE557909D patent/BE557909A/xx unknown
-
1956
- 1956-07-10 FR FR1155626D patent/FR1155626A/en not_active Expired
-
1957
- 1957-06-13 DE DEM34451A patent/DE1059533B/en active Pending
- 1957-06-28 US US668687A patent/US2919329A/en not_active Expired - Lifetime
- 1957-07-04 CH CH341549D patent/CH341549A/en unknown
- 1957-07-04 CH CH338884D patent/CH338884A/en unknown
- 1957-07-08 GB GB21511/57A patent/GB837825A/en not_active Expired
- 1957-07-08 GB GB21512/57A patent/GB837824A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1221332B (en) * | 1964-08-21 | 1966-07-21 | Bbc Brown Boveri & Cie | Gas pressure switch |
Also Published As
Publication number | Publication date |
---|---|
CH338884A (en) | 1959-06-15 |
FR1155626A (en) | 1958-05-06 |
BE557909A (en) | |
CH341549A (en) | 1959-10-15 |
DE1059533B (en) | 1959-06-18 |
US2919329A (en) | 1959-12-29 |
GB837824A (en) | 1960-06-15 |
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