GB503972A - Improvements in and relating to the protection of electric cables - Google Patents

Improvements in and relating to the protection of electric cables

Info

Publication number
GB503972A
GB503972A GB3091637A GB3091637A GB503972A GB 503972 A GB503972 A GB 503972A GB 3091637 A GB3091637 A GB 3091637A GB 3091637 A GB3091637 A GB 3091637A GB 503972 A GB503972 A GB 503972A
Authority
GB
United Kingdom
Prior art keywords
relating
protection
electric cables
indicating
faults
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
GB3091637A
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 GB3091637A priority Critical patent/GB503972A/en
Publication of GB503972A publication Critical patent/GB503972A/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

  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

503,972. Indicating faults. ALTHAM, T. F. Nov. 11, 1937, No. 30916. [Class 37] [Also in.Group XXXVII] For indicating or recording faults in a cable, the change in capacity of the condenser constituted by the core 1, insulation 2, and sheath 3, is utilized to disturb an oscillatory circuit of ordinary character excited by transformer 4. A galvanometer 5 or alarm-actuating relay 6 is located in the anode circuit of the valve.
GB3091637A 1937-11-11 1937-11-11 Improvements in and relating to the protection of electric cables Expired GB503972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3091637A GB503972A (en) 1937-11-11 1937-11-11 Improvements in and relating to the protection of electric cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3091637A GB503972A (en) 1937-11-11 1937-11-11 Improvements in and relating to the protection of electric cables

Publications (1)

Publication Number Publication Date
GB503972A true GB503972A (en) 1939-04-18

Family

ID=10315081

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3091637A Expired GB503972A (en) 1937-11-11 1937-11-11 Improvements in and relating to the protection of electric cables

Country Status (1)

Country Link
GB (1) GB503972A (en)

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