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Pat. 10411479 United States, Int. Cl.22 H02J 3/38, G01R 27/18, G01R 31/40, H02M 1/00, H02M 3/155, H02M 7/537, H02M 7/5387, H02S 50/10. Detection circuit and detection method for detecting insulation resistance of photovoltaic inverter, and photovoltaic inverter : Appl. N 15/407469 : Filed 17.01.2017 : Pub. 10.09.2019 : / Bingwen Weng, Xuancai Zhu, Kerou Wang, Jinfa Zhang ; Assignee Delta Electronics Shanghai Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10411479/en?oq=US10411479.html (дата обращения: ДД.ММ.ГГГГ).