GB524729A - Improvements in or relating to power operating mechanism applicable, for example, to electric switchgear - Google Patents
Improvements in or relating to power operating mechanism applicable, for example, to electric switchgearInfo
- Publication number
- GB524729A GB524729A GB387339A GB387339A GB524729A GB 524729 A GB524729 A GB 524729A GB 387339 A GB387339 A GB 387339A GB 387339 A GB387339 A GB 387339A GB 524729 A GB524729 A GB 524729A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- opened
- fluid
- operating mechanism
- stroke
- 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
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
524,729. Actuation of switches. GENERAL ELECTRIC CO., Ltd., and GARRARD, C. J. O. Feb. 6, 1939, No. 3873. [Class 38 (v)] A fluid-pressure operating mechanism, stated to be of general application, is shown in its application to a circuit-breaker, the movable contact of which is closed and opened by upward and downward movement, respectively, of a piston 3. To open, valve 9 is opened by hand or electromagnetically whereby piston 3 descends expelling fluid from beneath it to atmosphere by way of port L in valve 12. When about half the stroke is completed, valve 12 which, with valve 11, is driven from the contact mechanism, changes over and the fluid can only be expelled through a needle valve NV in the valve 10. Then, or shortly after, valve 11 changes over, cutting off the fluid-supply from reservoir 2 and allowing inertia and the expansion of fluid in the cylinder to complete the stroke. To close, the valve 10 is opened by hand or electromagnet'cally, and an analogous series of operations takes place. If the breaker closes on to a fault, the state of valve 12 permits instant reopening the moment valve 9 is opened by the overload relay, but an interlock may be provided' to ensure closure of valve 10 when 9 is thus opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB387339A GB524729A (en) | 1939-02-06 | 1939-02-06 | Improvements in or relating to power operating mechanism applicable, for example, to electric switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB387339A GB524729A (en) | 1939-02-06 | 1939-02-06 | Improvements in or relating to power operating mechanism applicable, for example, to electric switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB524729A true GB524729A (en) | 1940-08-13 |
Family
ID=9766483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB387339A Expired GB524729A (en) | 1939-02-06 | 1939-02-06 | Improvements in or relating to power operating mechanism applicable, for example, to electric switchgear |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB524729A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2939427A (en) * | 1956-03-08 | 1960-06-07 | Renault | Control device for fluid-operated reciprocating power apparatus |
| US3791627A (en) * | 1971-09-20 | 1974-02-12 | Zimmerman D W Mfg | Pneumatically-operated hoist with automatic control system |
| EP0530544A1 (en) * | 1991-09-06 | 1993-03-10 | Sécheron SA | Fluid pressure operating means, for opening and closing the contacts of a circuit breaker |
-
1939
- 1939-02-06 GB GB387339A patent/GB524729A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2939427A (en) * | 1956-03-08 | 1960-06-07 | Renault | Control device for fluid-operated reciprocating power apparatus |
| US3791627A (en) * | 1971-09-20 | 1974-02-12 | Zimmerman D W Mfg | Pneumatically-operated hoist with automatic control system |
| EP0530544A1 (en) * | 1991-09-06 | 1993-03-10 | Sécheron SA | Fluid pressure operating means, for opening and closing the contacts of a circuit breaker |
| US5298702A (en) * | 1991-09-06 | 1994-03-29 | Secheron Sa | Pressure medium drive for closing and opening the contacts of a circuit-breaker |
| CH684969A5 (en) * | 1991-09-06 | 1995-02-15 | Secheron Sa | A control device actuated by a pressurized fluid in particular for closing and opening the contacts of a circuit breaker. |
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