AT344255B - Differentialstromauswerteeinrichtung zur erdschlussueberwachung von zweiadrigen, je eine schleife bildenden leitungen, insbesondere fernsprechleitungen - Google Patents
Differentialstromauswerteeinrichtung zur erdschlussueberwachung von zweiadrigen, je eine schleife bildenden leitungen, insbesondere fernsprechleitungenInfo
- Publication number
- AT344255B AT344255B AT151276A AT151276A AT344255B AT 344255 B AT344255 B AT 344255B AT 151276 A AT151276 A AT 151276A AT 151276 A AT151276 A AT 151276A AT 344255 B AT344255 B AT 344255B
- Authority
- AT
- Austria
- Prior art keywords
- cables
- loop
- forming
- evaluation device
- differential current
- Prior art date
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)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT151276A AT344255B (de) | 1976-03-01 | 1976-03-01 | Differentialstromauswerteeinrichtung zur erdschlussueberwachung von zweiadrigen, je eine schleife bildenden leitungen, insbesondere fernsprechleitungen |
DE19762639168 DE2639168A1 (de) | 1976-03-01 | 1976-08-31 | Differentialstromauswerteeinrichtung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT151276A AT344255B (de) | 1976-03-01 | 1976-03-01 | Differentialstromauswerteeinrichtung zur erdschlussueberwachung von zweiadrigen, je eine schleife bildenden leitungen, insbesondere fernsprechleitungen |
Publications (2)
Publication Number | Publication Date |
---|---|
ATA151276A ATA151276A (de) | 1977-11-15 |
AT344255B true AT344255B (de) | 1978-07-10 |
Family
ID=3515297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT151276A AT344255B (de) | 1976-03-01 | 1976-03-01 | Differentialstromauswerteeinrichtung zur erdschlussueberwachung von zweiadrigen, je eine schleife bildenden leitungen, insbesondere fernsprechleitungen |
Country Status (2)
Country | Link |
---|---|
AT (1) | AT344255B (de) |
DE (1) | DE2639168A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8700941A (nl) * | 1987-04-21 | 1988-11-16 | Croon Elektrotechniek B V | Werkwijze en inrichting voor het testen van zelflimiterende elektrische verwarmingskabels die buiten bedrijf zijn. |
FI91454C (fi) * | 1992-10-05 | 1994-06-27 | Nokia Telecommunications Oy | Differentiaalinen virrantarkkailupiiri |
-
1976
- 1976-03-01 AT AT151276A patent/AT344255B/de not_active IP Right Cessation
- 1976-08-31 DE DE19762639168 patent/DE2639168A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE2639168A1 (de) | 1977-09-08 |
ATA151276A (de) | 1977-11-15 |
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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 |