Method of calculation of 0.4 kV input distribution devices Ivan Bandurin, Vladimir Ivanov, Alexandr Kakurin, Igor Kozyrev, Vladimir Korobov, Alexey Khaimin and Sergey Trashchenkov E3S Web Conf., 216 (2020) 01085 Published online: 14 December 2020 DOI: 10.1051/e3sconf/202021601085