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Pat. 10845427 United States, Int. Cl.22 G01R 19/02, G01R 19/25, G01R 31/50, H02H 3/33, H02H 3/347, H02J 3/38, H02M 1/32, H02M 7/44, H02H 7/20, H02M 1/00. Method for detecting earth-fault conditions in a power conversion apparatus : Appl. N 16/242563 : Filed 08.01.2019 : Pub. 24.11.2020 : / Silvio Scaletti, Alessandro Guerriero, Matteo Gargiulo ; Assignee Abb Schweiz Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10845427/en?oq=US10845427.html (дата обращения: ДД.ММ.ГГГГ).