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GB940564A - Improvements in or relating to electric cables - Google Patents

Improvements in or relating to electric cables

Info

Publication number
GB940564A
GB940564A GB3005861A GB3005861A GB940564A GB 940564 A GB940564 A GB 940564A GB 3005861 A GB3005861 A GB 3005861A GB 3005861 A GB3005861 A GB 3005861A GB 940564 A GB940564 A GB 940564A
Authority
GB
United Kingdom
Prior art keywords
cable
length
boils
volume
small bore
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
GB3005861A
Inventor
Edmund Hugh Ball
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.)
Pirelli General Cable Works Ltd
Pirelli General Cable Works
Original Assignee
Pirelli General Cable Works Ltd
Pirelli General Cable Works
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 Pirelli General Cable Works Ltd, Pirelli General Cable Works filed Critical Pirelli General Cable Works Ltd
Priority to GB3005861A priority Critical patent/GB940564A/en
Priority to FR901416A priority patent/FR1325552A/en
Priority to NL282319A priority patent/NL282319A/xx
Publication of GB940564A publication Critical patent/GB940564A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks

Landscapes

  • Level Indicators Using A Float (AREA)

Abstract

940,564. Protective arrangements. PIRELLI GENERAL CABLE WORKS Ltd. March 20, 1962 [Aug. 21, 1961], No. 30058/61. Heading H2K. [Also in Divisions G4 and H1] In a protective or alarm arrangement for a cable 1, the cable is provided with a small bore tube 6 extending substantially throughout the length of the cable. The tube 6 is closed at one end 10, is connected at the other end to a volume-responsive switch 11 and contains a liquid, e.g. carbon tetrachloride, which boils at the maximum permissible operating temperature of the cable. When the liquid boils, the switch 11, which may be float or diaphragm operated, completes a circuit for a detecting device (not shown) which may be an alarm. In the case of a cable route comprising at least two cable lengths in tandem, each length is provided with a small bore tube 6 and a volume responsive switch 11. The switches are connected across twin auxiliary conductors 9 which are provided in all but the last cable length, the twin conductors being in one arm of a Wheatstone bridge circuit containing the detector, Fig. 1 (not shown).
GB3005861A 1961-08-21 1961-08-21 Improvements in or relating to electric cables Expired GB940564A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3005861A GB940564A (en) 1961-08-21 1961-08-21 Improvements in or relating to electric cables
FR901416A FR1325552A (en) 1961-08-21 1962-06-21 Electric cable with temperature control device
NL282319A NL282319A (en) 1961-08-21 1962-08-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3005861A GB940564A (en) 1961-08-21 1961-08-21 Improvements in or relating to electric cables

Publications (1)

Publication Number Publication Date
GB940564A true GB940564A (en) 1963-10-30

Family

ID=10301576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3005861A Expired GB940564A (en) 1961-08-21 1961-08-21 Improvements in or relating to electric cables

Country Status (2)

Country Link
GB (1) GB940564A (en)
NL (1) NL282319A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188803A (en) * 1986-04-03 1987-10-07 Gen Electric Over temperature sensing system for power cables

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188803A (en) * 1986-04-03 1987-10-07 Gen Electric Over temperature sensing system for power cables
GB2188803B (en) * 1986-04-03 1990-08-29 Gen Electric Over temperature sensing system for power cables

Also Published As

Publication number Publication date
NL282319A (en) 1964-12-28

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