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Pat. 10386426 United States, Int. Cl.22 G01R 1/20, G01R 31/42, G01R 31/50, H02M 1/084, H02M 7/04, H02M 7/44, G01R 31/40. Detecting a failure of a phase in a grid for inverters having a frequency detection in an intermediate DC voltage link : Appl. N 15/198771 : Filed 30.06.2016 : Pub. 20.08.2019 : / Andreas Schrepfer ; Assignee Schmidhauser Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10386426/en?oq=US10386426.html (дата обращения: ДД.ММ.ГГГГ).