GB764074A - Improvements in electric circuit interrupters having sickle-shaped contacts - Google Patents
Improvements in electric circuit interrupters having sickle-shaped contactsInfo
- Publication number
- GB764074A GB764074A GB26898/54A GB2689854A GB764074A GB 764074 A GB764074 A GB 764074A GB 26898/54 A GB26898/54 A GB 26898/54A GB 2689854 A GB2689854 A GB 2689854A GB 764074 A GB764074 A GB 764074A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- liquid
- switch
- assembly
- rod
- 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
- H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
-
- 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
- H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
- H01H33/75—Liquid-break switches, e.g. oil-break
Landscapes
- Circuit Breakers (AREA)
- Manufacture Of Switches (AREA)
Abstract
764,074. Liquid-blast switches; switch contacts. ALLIS-CHALMERS MANUFACTURING CO. Sept. 16, 1954 [Nov. 3, 1953], No. 26898/54. Class 38(5) Each arc-interrupting unit in a liquidblast switch has a stationary contact 11 formed by a plurality of segments biased together and grooved to form slots 17, 18 which provide contact surfaces co-operating with a moving arcing contact 10 on a pivoted sickle-shaped member 13 and a second moving contact 12, a barrier plate assembly 42 providing an arc extinguishing passageway 63 receiving the sickelshaped member 13. The stationary contact 11 is tubular and may have two segments biased by springs 15 which provide pivotal mountings for the segments for alignment purposes. The upper slot 17 is rectangular and forms a pressure generating enclosure whilst the lower slot is cylindrical. The barrier plate assembly 42, Figs. 6 to 11 (not shown) is arranged to provide transverse blasts of liquid across the passageway 63 when pressure is set up in a chamber 9 on the downward movement of a piston 37. This liquid may be exhausted from the assembly 42 past the contact 11 into a lower barrier plate assembly 43. Alternatively, a pipe plug 59 may be removed so that the liquid and arc gases may exhaust directly into the tank housing the switch. The lower assembly 43 may provide helical passages. Final arc extinction is ensured by two parallel resistors 45 (one shown) connected between the contact 10 and an auxiliary electrode 48 between the assembly 43 and an outlet nozzle 55. The contact 12 is secured to, and operated by, a conducting cross-bar 3 which, when raised, closes the contact 10 against the bias of springs 27 through the medium of a push rod 26 and links 29 pivoted at 28 to the sickle-shaped member 13 and at 30 to a bifurcated metallic cap member 32 on the push rod 26. The rod 26 also moves a push rod 34 to raise the spring-biased piston 37 and a valve 36. When the bar 3 is lowered to open the switch, the downward movement of the rod 26 under the bias of the springs 27 opens the contacts 10, 11 and simultaneously, or with a slight delay, the contacts 11, 12 open. The piston 37 moves downwardly with the rod 26 if the current to be interrupted is low or when permitted to do so by the pressure in the chamber 9 if the current is high. Specification 764,073 is referred to
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US389953A US2811614A (en) | 1953-11-03 | 1953-11-03 | Circuit breaker employing sickle shaped contact, engaging stationary contact and impulse grid |
Publications (1)
Publication Number | Publication Date |
---|---|
GB764074A true GB764074A (en) | 1956-12-19 |
Family
ID=23540450
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26898/54A Expired GB764074A (en) | 1953-11-03 | 1954-09-16 | Improvements in electric circuit interrupters having sickle-shaped contacts |
GB26899/54A Expired GB764075A (en) | 1953-11-03 | 1954-09-16 | An electric switching arrangement for use in a liquid-blast circuit interrupter |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26899/54A Expired GB764075A (en) | 1953-11-03 | 1954-09-16 | An electric switching arrangement for use in a liquid-blast circuit interrupter |
Country Status (2)
Country | Link |
---|---|
US (1) | US2811614A (en) |
GB (2) | GB764074A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1293885B (en) * | 1960-04-14 | 1969-04-30 | Mc Graw Edison Co | Low-fluid electrical circuit breaker |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3361885A (en) * | 1965-02-26 | 1968-01-02 | Ite Circuit Breaker Ltd | Oil circuit breaker interrupter having keyed separable plates with laminar flow preventing projections and connection means for connecting the interrupter tube and stationary contacts within the interrupter tube to a common support |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE719244C (en) * | 1935-08-20 | 1942-04-02 | Siemens Schuckertwrke Ag | Low-fluid type circuit breakers |
US2545334A (en) * | 1950-06-23 | 1951-03-13 | Gen Electric | Electric circuit interrupter |
US2600211A (en) * | 1950-04-15 | 1952-06-10 | Westinghouse Electric Corp | Circuit interrupter having finger contacts |
US2621273A (en) * | 1950-04-28 | 1952-12-09 | Westinghouse Electric Corp | Liquid-break circuit interrupter |
US2695349A (en) * | 1951-07-31 | 1954-11-23 | Westinghouse Electric Corp | Over-pressure valve for liquid circuit interrupter |
-
1953
- 1953-11-03 US US389953A patent/US2811614A/en not_active Expired - Lifetime
-
1954
- 1954-09-16 GB GB26898/54A patent/GB764074A/en not_active Expired
- 1954-09-16 GB GB26899/54A patent/GB764075A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1293885B (en) * | 1960-04-14 | 1969-04-30 | Mc Graw Edison Co | Low-fluid electrical circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
GB764075A (en) | 1956-12-19 |
US2811614A (en) | 1957-10-29 |
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