EP 1053555 A1 20001122 - METHOD AND DEVICE FOR OPERATING A CIRCUIT BREAKER
Title (en)
METHOD AND DEVICE FOR OPERATING A CIRCUIT BREAKER
Title (de)
VERFAHREN UND VORRICHTUNG ZUM BETRIEB EINES LEISTUNGSSCHALTERS
Title (fr)
PROCEDE ET DISPOSITIF POUR FAIRE FONCTIONNER UN DISJONCTEUR
Publication
Application
Priority
- DE 9900375 W 19990205
- DE 19806345 A 19980212
Abstract (en)
[origin: DE19806345A1] The invention relates to a method and a device for operating a circuit breaker (1) with instantaneous release during short circuit and which can be used in the protection of electrical installations. The basic principle of the invention is that the induced current caused by mechanical vibrations in the coil by the electromagnets (6, 14, 20) available in the circuit breaker (1) during closing of the circuit breaker contacts (17,18) is detected and evaluated. The detected decaying pulse-shaped alternating current is transformed into decaying direct current by an integrator circuit and evaluated by a microcontroller in an analog/digital converter channel. When the trigger is activated by the power flow injected into the circuit breaker (1) and immediately after a short-circuit current is detected, the trigger can be immediately reactivated in the presence of an induced current or a direct current signal derived from said current or can bring about a new triggering at a given delay without the existence of induced current or direct current signals.
IPC 1-7
IPC 8 full level
H01H 33/42 (2006.01); H01H 33/59 (2006.01); H01H 71/00 (2006.01); H01H 71/10 (2006.01)
CPC (source: EP)
H01H 71/00 (2013.01); H01H 71/1081 (2013.01)
Citation (search report)
See references of WO 9941759A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 19806345 A1 19990819; EP 1053555 A1 20001122; JP 2004500680 A 20040108; WO 9941759 A1 19990819
DOCDB simple family (application)
DE 19806345 A 19980212; DE 9900375 W 19990205; EP 99907324 A 19990205; JP 2000531856 A 19990205