FR772411A - Improvements in the detection of weak electric currents - Google Patents

Improvements in the detection of weak electric currents

Info

Publication number
FR772411A
FR772411A FR772411DA FR772411A FR 772411 A FR772411 A FR 772411A FR 772411D A FR772411D A FR 772411DA FR 772411 A FR772411 A FR 772411A
Authority
FR
France
Prior art keywords
detection
electric currents
weak electric
weak
currents
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
Other languages
French (fr)
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.)
ELECTRICAL LEAKAGE DETECTORS L
Original Assignee
ELECTRICAL LEAKAGE DETECTORS L
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 ELECTRICAL LEAKAGE DETECTORS L filed Critical ELECTRICAL LEAKAGE DETECTORS L
Application granted granted Critical
Publication of FR772411A publication Critical patent/FR772411A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G01R27/18—Measuring resistance to earth, i.e. line to ground
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/155—Indicating the presence of voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
FR772411D 1933-04-13 1934-04-11 Improvements in the detection of weak electric currents Expired FR772411A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11181/33A GB418064A (en) 1933-04-13 1933-04-13 Improvements in and relating to the detection of electrical leakage

Publications (1)

Publication Number Publication Date
FR772411A true FR772411A (en) 1934-10-29

Family

ID=9981493

Family Applications (1)

Application Number Title Priority Date Filing Date
FR772411D Expired FR772411A (en) 1933-04-13 1934-04-11 Improvements in the detection of weak electric currents

Country Status (2)

Country Link
FR (1) FR772411A (en)
GB (1) GB418064A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025514B (en) * 1953-09-19 1958-03-06 Siemens Ag Device for earth fault monitoring of closed or open direct current networks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025514B (en) * 1953-09-19 1958-03-06 Siemens Ag Device for earth fault monitoring of closed or open direct current networks

Also Published As

Publication number Publication date
GB418064A (en) 1934-10-15

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