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
Application number
GB1465816A
Inventor
Frederick Bernard Whitaker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB1465816A priority Critical patent/GB109679A/en
Publication of GB109679A publication Critical patent/GB109679A/en
Priority claimed from US193531A external-priority patent/US1337866A/en
Expired legal-status Critical Current

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.
GB1465816A 1916-10-16 1916-10-16 Improvements in or relating to the Protection of Electric Cables. Expired GB109679A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545368A (en) * 1949-05-21 1951-03-13 Gen Electric Electrical power control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
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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