EP 1817826 A1 20070815 - METHOD AND CIRCUIT FOR AMPLIFYING THE INPUT SIGNALS OF AN ELECTRONIC OVERCURRENT RELEASE OF LOW-VOLTAGE CIRCUIT BREAKERS WITH A SELECTABLE AMPLIFICATION FACTOR
Title (en)
METHOD AND CIRCUIT FOR AMPLIFYING THE INPUT SIGNALS OF AN ELECTRONIC OVERCURRENT RELEASE OF LOW-VOLTAGE CIRCUIT BREAKERS WITH A SELECTABLE AMPLIFICATION FACTOR
Title (de)
VERFAHREN UND SCHALTUNGSANORDNUNG ZUR VERSTÄRKUNG DER EINGANGSSIGNALE EINES ELEKTRONISCHEN ÜBERSTROMAUSLÖSERS VON NIEDERSPANNUNGS-LEISTUNGSSCHALTERN MIT WÄHLBAREM VERSTÄRKUNGSGRAD
Title (fr)
PROCEDE ET CIRCUIT POUR AMPLIFIER LES SIGNAUX D'ENTREE D'UN DISCONTACTEUR ELECTRONIQUE DE DISJONCTEURS BASSE TENSION A DEGRE D'AMPLIFICATION SELECTIONNABLE
Publication
Application
Priority
- EP 2005055880 W 20051110
- DE 102004058763 A 20041130
Abstract (en)
[origin: WO2006058823A1] The invention relates to a method and a circuit for amplifying the input signals of an electronic overcurrent release of low-voltage circuit breakers with a selectable amplification factor, said electronic overcurrent release comprising at least one integrating condenser on the input side, and at least one pre-amplifier and a microprocessor. According to the invention, a resistance is coupled to a switch in series, parallel to an integrating condenser, and the switch is switched by means of the microprocessor in a pulsewidth-modulated manner. In this way, the effectively active resistance value of the inserted resistances is inversely increased proportionally to the pulsewidth repetition rate, thus obtaining an extremely wide regulating range.
IPC 8 full level
H02H 1/00 (2006.01); G01R 19/25 (2006.01)
CPC (source: EP US)
H02H 1/0007 (2013.01 - EP US); H02H 3/006 (2013.01 - EP US)
Citation (search report)
See references of WO 2006058823A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 102004058763 A1 20060608; CN 101048924 A 20071003; EP 1817826 A1 20070815; US 2008123237 A1 20080529; WO 2006058823 A1 20060608
DOCDB simple family (application)
DE 102004058763 A 20041130; CN 200580037355 A 20051110; EP 05810924 A 20051110; EP 2005055880 W 20051110; US 79185705 A 20051110