EP 1186083 A1 20020313 - METHOD FOR OPERATING AN ELECTRONIC OVERCURRENT TRIP OF A POWER CIRCUIT BREAKER
Title (en)
METHOD FOR OPERATING AN ELECTRONIC OVERCURRENT TRIP OF A POWER CIRCUIT BREAKER
Title (de)
VERFAHREN ZUM BETRIEB EINES ELEKTRONISCHEN ÜBERSTROMAUSLÖSERS EINES LEISTUNGSSCHALTERS
Title (fr)
PROCEDE D'EXPLOITATION D'UN DISCONTACTEUR ELECTRONIQUE DE SECTIONNEUR DE PUISSANCE
Publication
Application
Priority
- DE 0001803 W 20000531
- DE 19927029 A 19990604
Abstract (en)
[origin: WO0076046A1] In power circuit breakers which comprise a current transformer (6) having an ironless current detection coil (7) and an integration circuit (8) connected in outgoing circuit to said current detection coil (7), a faulty tripping can result due to the unavoidable time constant of the integration circuit (8). This is prevented by the inventive method in which the instantaneous values of the current are detected and stored in established periodic intervals (n, n+1, n+2). The stored measured values are compared according to polarity and magnitude. If the stored values of the same polarity prove to be monotonically decreasing, it is then assumed that an equivalent term is output by the integrator (8), and a trip blocking signal is input into the electronic trip of the power circuit breaker.
IPC 1-7
IPC 8 full level
G01R 31/28 (2006.01); H02H 1/04 (2006.01); G01R 15/18 (2006.01); H02H 1/00 (2006.01)
CPC (source: EP US)
H02H 1/0007 (2013.01 - EP US); H02H 1/04 (2013.01 - EP US); H02H 3/006 (2013.01 - EP US); G01R 15/181 (2013.01 - EP US); H02H 1/0092 (2013.01 - EP US)
Citation (search report)
See references of WO 0076046A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0076046 A1 20001214; DE 19927029 A1 20010208; EP 1186083 A1 20020313; EP 1638182 A2 20060322; EP 1638182 A3 20060920; US 2002158633 A1 20021031; US 6559648 B2 20030506
DOCDB simple family (application)
DE 0001803 W 20000531; DE 19927029 A 19990604; EP 00951197 A 20000531; EP 05077634 A 20000531; US 98090701 A 20011204