A method for fault detection in a power transformer/autotransformer and/or interconnected power lines, which are within the zone protected by the differential protection, and particularly suitable for detecting turn-to-turn faults in power transformer/autotransformer windings. All individual instantaneous...http://www.google.com/patents/US7812615?utm_source=gb-gplus-sharePatent US7812615 - Method and device for fault detection in transformers or power lines
