GB580787A - Improvements in and relating to electrical earth leakage devices for electrical apparatus - Google Patents
Improvements in and relating to electrical earth leakage devices for electrical apparatusInfo
- Publication number
- GB580787A GB580787A GB14178/44A GB1417844A GB580787A GB 580787 A GB580787 A GB 580787A GB 14178/44 A GB14178/44 A GB 14178/44A GB 1417844 A GB1417844 A GB 1417844A GB 580787 A GB580787 A GB 580787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrical
- winding
- frame
- armature
- relating
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
580,787. Protective cut-out arrangements ; testing for faults. WIMSETT, S. J., and RECORD ELECTRICAL CO., Ltd. July 25. 1944, No. 14178. [Class 38 (v)] [Also in Group XXXVI] On the occurrence of a leakage to the frame 19 of electrical apparatus, a winding 5 comprising many turns of fine wire connected to earth E, closes contacts 7, 12 and connects the frame 19 to neutral through a winding 6 of few turns of heavy wire on the same iron core as 5, so permitting an increased current to flow long enough to blow a fuse 20 in the main circuit. When attracted, the armature 8 releases a drop indicator 14 which is visible through a window in the casing and resettable by press-button 15. A vibrating reed 9 gives audible indication of a fault whch is insufficient to operate armature 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14178/44A GB580787A (en) | 1944-07-25 | 1944-07-25 | Improvements in and relating to electrical earth leakage devices for electrical apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14178/44A GB580787A (en) | 1944-07-25 | 1944-07-25 | Improvements in and relating to electrical earth leakage devices for electrical apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB580787A true GB580787A (en) | 1946-09-19 |
Family
ID=10036414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14178/44A Expired GB580787A (en) | 1944-07-25 | 1944-07-25 | Improvements in and relating to electrical earth leakage devices for electrical apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB580787A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3047775A (en) * | 1956-07-23 | 1962-07-31 | Leriche Marie Madelein Therese | Protective device for electrical appliance |
US3234316A (en) * | 1963-03-20 | 1966-02-08 | Electric Furnace Co | Device for detecting grounds in electric furnaces |
US5336999A (en) * | 1989-08-08 | 1994-08-09 | British Technology Group Limited | Echo planar imaging using 180 degrees pulses |
-
1944
- 1944-07-25 GB GB14178/44A patent/GB580787A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3047775A (en) * | 1956-07-23 | 1962-07-31 | Leriche Marie Madelein Therese | Protective device for electrical appliance |
US3234316A (en) * | 1963-03-20 | 1966-02-08 | Electric Furnace Co | Device for detecting grounds in electric furnaces |
US5336999A (en) * | 1989-08-08 | 1994-08-09 | British Technology Group Limited | Echo planar imaging using 180 degrees pulses |
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