EP 1131642 A1 20010912 - METHOD FOR DETERMINING AN EARTH-FAULTED BRANCH
Title (en)
METHOD FOR DETERMINING AN EARTH-FAULTED BRANCH
Title (de)
VERFAHREN ZUR BESTIMMUNG DES ERDSCHLUSSBEHAFTETEN ABZWEIGES
Title (fr)
PROCEDE DE DETERMINATION D'UN BRANCHEMENT PRESENTANT UNE PERTE A LA TERRE
Publication
Application
Priority
- AT 194698 A 19981120
- EP 9908833 W 19991117
Abstract (en)
[origin: WO0031554A1] The invention relates to a method and a device for determining an earth-faulted branch in an extinguished power supply network. Said method consists of the following steps: a) selection of physical measuring quantities and measurement of said quantities; b) determination, for each branch, of a degree of agreement corresponding to the presence of an earth fault from selected measured quantities and a conduction model, using a first evaluation method; c) determination, for each branch, of a degree of agreement corresponding to the presence of an earth fault from selected measured quantities and a conduction model, using at least one second evaluation method which differs from the first method at least as regards the measured quantities evaluated and/or the conduction model and/or evaluation; d) linkage by a logic operation of the degrees of agreement determined by the first and second method so that a overall degree of agreement is obtained for each branch; e) indication of an earth fault for a branch if the overall degree of agreement for this branch exceeds a defined value. The method and device provided for in the invention permit the highly reliable detection and indication of especially short as well as particularly high-ohmic earth faults.
IPC 1-7
IPC 8 full level
G01R 19/25 (2006.01); G01R 31/02 (2006.01); G01R 31/08 (2006.01); G01R 31/28 (2006.01); H02H 7/26 (2006.01); H02H 3/38 (2006.01)
CPC (source: EP US)
G01R 31/52 (2020.01 - EP US); H02H 7/26 (2013.01 - EP US); G01R 31/086 (2013.01 - EP); G01R 31/088 (2013.01 - EP); H02H 3/385 (2013.01 - EP)
Citation (search report)
See references of WO 0031554A1
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
WO 0031554 A1 20000602; AT A194698 A 20011115; AT E376188 T1 20071115; DE 59914531 D1 20071129; EP 1131642 A1 20010912; EP 1443336 A2 20040804; EP 1443336 A3 20051214; EP 1443336 B1 20071017; EP 1533623 A2 20050525; EP 1533623 A3 20101006
DOCDB simple family (application)
EP 9908833 W 19991117; AT 04004802 T 19991117; AT 194698 A 19981120; DE 59914531 T 19991117; EP 04004802 A 19991117; EP 05100754 A 19991117; EP 99963307 A 19991117