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Pat. 10886726 United States, Int. Cl.22 H02H 7/04, F03D 9/25, G05F 1/10, H01F 38/14, H02H 1/00, H02H 9/02, H02J 3/18, H02K 7/18, H02M 5/42, H02P 9/00, F03D 7/02, F03D 80/00, H02H 3/00. Control method for protecting transformers : Appl. N 15/705411 : Filed 15.09.2017 : Pub. 05.01.2021 : / Cornelius Edward Holliday, Devendra S. Dange, Lahlali Benchaita ; Assignee General Electric Co ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10886726/en?oq=US10886726.html (дата обращения: ДД.ММ.ГГГГ).