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This paper presents the electric diagram conception of the new substation BH Centro 2, which will substitute the existent substation BH Centro 1, that currently supplies the central area of Belo Horizonte city. The BH Centro 1 substation is the biggest substation of Cemig Distribution Company, with regard to its transformation capacity (138-13.8 kV - 150 MVA). Operating since 1970, the substation...