GB737746A - Improvements in the testing of the insulation of electric conductors - Google Patents

Improvements in the testing of the insulation of electric conductors

Info

Publication number
GB737746A
GB737746A GB1314652A GB1314652A GB737746A GB 737746 A GB737746 A GB 737746A GB 1314652 A GB1314652 A GB 1314652A GB 1314652 A GB1314652 A GB 1314652A GB 737746 A GB737746 A GB 737746A
Authority
GB
United Kingdom
Prior art keywords
test
testing
operates
neons
relay
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
GB1314652A
Inventor
Stanley George Meadows
Lister Hallas
Anthony Herbert Coppard
George Harry King
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.)
STHN UNITED TELEPHONE CABLES
Original Assignee
STHN UNITED TELEPHONE CABLES
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 STHN UNITED TELEPHONE CABLES filed Critical STHN UNITED TELEPHONE CABLES
Priority to GB1314652A priority Critical patent/GB737746A/en
Publication of GB737746A publication Critical patent/GB737746A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

737,746. Testing insulation resistance. SOUTHERN UNITED TELEPHONE CABLES, Ltd. May 26, 1953 [May 23, 1952], No. 13146/52. Class 37. In apparatus for testing the insula. tion of a number of conductors in sequence through a series resistor the device which normally operates to connect the next conductor to the test voltage fails to operate if the insulation of the conductor under test is defective or below the standard required. The invention is described with reference to testing the quads of a communication cable. In the Figure, following closure of start switch X relay A operates and locks and energizes B which also locks whereby the quads 30-33 are coupled to the test apparatus and test voltage 28 is injected into the first line 33 through resistor 26. If wire 33 is sound neons 21-22 glow and relay C operates and if wires 32, 31 and 30 are also satisfactory their neons 21-22 and relays D, E and F respond in sequence through individual resistor 26 to test-voltage 28. If a wire (e.g. 31) has defective insulation the leakage current means a reduced voltage to earth at the junction of the insulation resistance and the test resistor 26 so that neons 21-22 fail to strike and the relay concerned E will not operate to connect the next wire 30 to the test voltage 28. The operator knows that 31 is defective because only the neons 21-22 for 33 and 32 are glowing. When F operates a slugged relay G is energized and A and B revert to disconnect the lines 30-33 from the test apparatus. When G operates apparatus may be introduced which connects another group of wires for testing in place of 30-33 or connects 30-33 to different testing equipment.
GB1314652A 1952-05-23 1952-05-23 Improvements in the testing of the insulation of electric conductors Expired GB737746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1314652A GB737746A (en) 1952-05-23 1952-05-23 Improvements in the testing of the insulation of electric conductors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1314652A GB737746A (en) 1952-05-23 1952-05-23 Improvements in the testing of the insulation of electric conductors

Publications (1)

Publication Number Publication Date
GB737746A true GB737746A (en) 1955-09-28

Family

ID=10017695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1314652A Expired GB737746A (en) 1952-05-23 1952-05-23 Improvements in the testing of the insulation of electric conductors

Country Status (1)

Country Link
GB (1) GB737746A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170115A (en) * 1960-07-20 1965-02-16 Western Electric Co Voltage breakdown test circuit
CN112967581A (en) * 2021-03-05 2021-06-15 湖北第二师范学院 Object conductivity detector and detection method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170115A (en) * 1960-07-20 1965-02-16 Western Electric Co Voltage breakdown test circuit
CN112967581A (en) * 2021-03-05 2021-06-15 湖北第二师范学院 Object conductivity detector and detection method
CN112967581B (en) * 2021-03-05 2024-05-17 湖北第二师范学院 Object conductivity detector and detection method

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