Global patent index - EP 1053555 A1

EP 1053555 A1 2000-11-22 - 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

EP 1053555 A1 (DE)

Application

EP 99907324 A

Priority

  • DE 9900375 W
  • DE 19806345 A

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 (main, further and additional classification)

H01H 71/00; H01H 71/10

IPC 8 full level (invention and additional information)

H01H 33/42 (2006.01); H01H 33/59 (2006.01); H01H 71/00 (2006.01); H01H 71/10 (2006.01)

CPC (invention and additional information)

H01H 71/1081 (2013.01); H01H 71/00 (2013.01)

Citation (search report)

See references of WO 9941759A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

DE 19806345 A1 19990819; EP 1053555 A1 20001122; JP 2004500680 A 20040108; WO 9941759 A1 19990819

INPADOC legal status

2003-03-26 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020723

2001-08-08 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010622

2000-11-22 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000811

2000-11-22 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IT