ATA151276A - DIFFERENTIAL CURRENT EVALUATION DEVICE FOR EARTH FAULT MONITORING OF TWO-WIRE CABLES EACH FORMING A LOOP, IN PARTICULAR TELEPHONE LINES - Google Patents

DIFFERENTIAL CURRENT EVALUATION DEVICE FOR EARTH FAULT MONITORING OF TWO-WIRE CABLES EACH FORMING A LOOP, IN PARTICULAR TELEPHONE LINES

Info

Publication number
ATA151276A
ATA151276A AT151276A AT151276A ATA151276A AT A151276 A ATA151276 A AT A151276A AT 151276 A AT151276 A AT 151276A AT 151276 A AT151276 A AT 151276A AT A151276 A ATA151276 A AT A151276A
Authority
AT
Austria
Prior art keywords
loop
forming
evaluation device
telephone lines
differential current
Prior art date
Application number
AT151276A
Other languages
German (de)
Other versions
AT344255B (en
Inventor
Karl Ing Formanek
Original Assignee
Siemens Ag Oesterreich
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 Siemens Ag Oesterreich filed Critical Siemens Ag Oesterreich
Priority to AT151276A priority Critical patent/AT344255B/en
Priority to DE19762639168 priority patent/DE2639168A1/en
Publication of ATA151276A publication Critical patent/ATA151276A/en
Application granted granted Critical
Publication of AT344255B publication Critical patent/AT344255B/en

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
    • G01R19/10—Measuring sum, difference or ratio
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
AT151276A 1976-03-01 1976-03-01 DIFFERENTIAL CURRENT EVALUATION DEVICE FOR EARTH FAULT MONITORING OF TWO-WIRE CABLES, EACH FORMING A LOOP, IN PARTICULAR TELEPHONE CABLES AT344255B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT151276A AT344255B (en) 1976-03-01 1976-03-01 DIFFERENTIAL CURRENT EVALUATION DEVICE FOR EARTH FAULT MONITORING OF TWO-WIRE CABLES, EACH FORMING A LOOP, IN PARTICULAR TELEPHONE CABLES
DE19762639168 DE2639168A1 (en) 1976-03-01 1976-08-31 Earth resistance monitor for telephone lines - has two potential difference detectors between pairs of isolating capacitors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT151276A AT344255B (en) 1976-03-01 1976-03-01 DIFFERENTIAL CURRENT EVALUATION DEVICE FOR EARTH FAULT MONITORING OF TWO-WIRE CABLES, EACH FORMING A LOOP, IN PARTICULAR TELEPHONE CABLES

Publications (2)

Publication Number Publication Date
ATA151276A true ATA151276A (en) 1977-11-15
AT344255B AT344255B (en) 1978-07-10

Family

ID=3515297

Family Applications (1)

Application Number Title Priority Date Filing Date
AT151276A AT344255B (en) 1976-03-01 1976-03-01 DIFFERENTIAL CURRENT EVALUATION DEVICE FOR EARTH FAULT MONITORING OF TWO-WIRE CABLES, EACH FORMING A LOOP, IN PARTICULAR TELEPHONE CABLES

Country Status (2)

Country Link
AT (1) AT344255B (en)
DE (1) DE2639168A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8700941A (en) * 1987-04-21 1988-11-16 Croon Elektrotechniek B V METHOD AND APPARATUS FOR TESTING SELF-LIMITING ELECTRIC HEATING CABLES OUT OF OPERATION
FI91454C (en) * 1992-10-05 1994-06-27 Nokia Telecommunications Oy Differential current monitoring circuit

Also Published As

Publication number Publication date
AT344255B (en) 1978-07-10
DE2639168A1 (en) 1977-09-08

Similar Documents

Publication Publication Date Title
FR2344198A1 (en) TELECOMMUNICATIONS NETWORK
SE7700260L (en) SHOULDER ART
DK253677A (en) CONSTRUCTION MACHINE ISER EXCAVATOR
SE7701627L (en) PROTECTIVE DEVICE FOR LOW VOLTAGE LINES, SEPARATE TELEPHONE LINE NETWORK
SE413653B (en) Cable ties
SE7700812L (en) TESTING DEVICE FOR TELEPHONE CABLES
AT352199B (en) OVERHEAD CABLE WITH COMMUNICATION LINE
NL7704600A (en) DREDGING EQUIPMENT AND METHOD.
JPS52150532A (en) Ground fault detection device
IT1059923B (en) PREPAID TELEPHONE EQUIPMENT WITH MICROCALCULATOR
IT7867533A0 (en) FAULT INDICATOR DEVICE IN A NUMERICAL SIGNAL TRANSMISSION NETWORK
ATA151276A (en) DIFFERENTIAL CURRENT EVALUATION DEVICE FOR EARTH FAULT MONITORING OF TWO-WIRE CABLES EACH FORMING A LOOP, IN PARTICULAR TELEPHONE LINES
NL7704693A (en) ELECTRICAL FILTER NETWORK.
BE850499A (en) IMPROVED SEISMIC NETWORK
SE421577B (en) TELEPHONE EQUIPMENT
NL7710252A (en) DEVELOPMENT EQUIPMENT.
DK380277A (en) TRANSMISSION EVENT WITH A TERMINAL NETWORK
BE856960A (en) LINE CURRENT DETECTION DEVICE
AT351095B (en) ALTERNATING CURRENT PROTECTION CIRCUIT, IN PARTICULAR FOR DETECTING EARTH FAULTS IN CABLE NETWORKS
BR7706731A (en) IMPROVEMENT IN A MINING EQUIPMENT
DD129831A5 (en) TELECOMMUNICATIONS CABLE
AR216779A1 (en) CONCENTRATION NETWORK FOR TELEPHONE CENTRAL
AT374997B (en) CIRCUIT ARRANGEMENT FOR DETECTING AND EVALUATING LOOP CONDITION CHANGES IN CENTRALLY CONTROLLED TELECOMMUNICATIONS, IN PARTICULAR TELECOMMUNICATION SYSTEMS
ES224089Y (en) ALARM EQUIPMENT.
NL7606282A (en) DREDGING EQUIPMENT.

Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties