An apparatus (14) for detecting a zero crossing of an alternating current after occurrence of a fault in a current path (2) for determining a suitable time for opening an electric switching device (2) arranged in the current path for breaking the current in the current path comprises members (15) adapted...http://www.google.fr/patents/US20040090719?utm_source=gb-gplus-shareBrevet US20040090719 - Method and device for prediction of a zero-crossing alternating current
Method and device for prediction of a zero-crossing alternating current
Numéro de demande: 10/297,402 Numéro de publication: US 2004/0090719 A1 Date de dépôt: 4 juin 2003 Brevet délivré: US7010436 ( Date de délivrance 7 mars 2006)
