GB109679A - Improvements in or relating to the Protection of Electric Cables. - Google Patents
Improvements in or relating to the Protection of Electric Cables.Info
- Publication number
- GB109679A GB109679A GB1465816A GB1465816A GB109679A GB 109679 A GB109679 A GB 109679A GB 1465816 A GB1465816 A GB 1465816A GB 1465816 A GB1465816 A GB 1465816A GB 109679 A GB109679 A GB 109679A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shield
- cable
- conductor
- switch
- opening
- 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
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
Landscapes
- Cable Accessories (AREA)
Abstract
109,679. Whitaker, F. B. Oct. 16, 1916. Protective arrangements.-In the protection of electric conductors, feeders, or cables which have a conducting-shield c, insulated from but surrounding the conductor &c. a the shield is completely insulated and is connected to the conductor through a circuit containing a tripping- coil c, which either directly or through relays opens the main switch f on occurrence of a fault. In a multi-core cable, each conductor has a separate shield. When a fault occurs in the outer insulation or in the insulation between two shields in a multi-core cable, a trip circuit is completed ever the fault and the normal earth connexion of the cable. A separate trip circuit as above described may be placed at each end of the cable; or the opening of the switch at one end may close a relay circuit to open the switch at the other end. In a three-phase cable as shown the opening of any one switch is followed by the opening of the others. The shield may be divided along its length. In systems where the conductors are supported at intervals, the shields may be discontinuous or the shield may be embodied in the insulation, the shield not completely surrounding the conductor. A pilot wire may be embodied in the cable and used for the relay circuits.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1465816A GB109679A (en) | 1916-10-16 | 1916-10-16 | Improvements in or relating to the Protection of Electric Cables. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1465816A GB109679A (en) | 1916-10-16 | 1916-10-16 | Improvements in or relating to the Protection of Electric Cables. |
US193531A US1337866A (en) | 1917-09-27 | 1917-09-27 | System for protecting electric cables |
Publications (1)
Publication Number | Publication Date |
---|---|
GB109679A true GB109679A (en) | 1917-09-27 |
Family
ID=32510414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1465816A Expired GB109679A (en) | 1916-10-16 | 1916-10-16 | Improvements in or relating to the Protection of Electric Cables. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB109679A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2545368A (en) * | 1949-05-21 | 1951-03-13 | Gen Electric | Electrical power control circuit |
-
1916
- 1916-10-16 GB GB1465816A patent/GB109679A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2545368A (en) * | 1949-05-21 | 1951-03-13 | Gen Electric | Electrical power control circuit |
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