Switch Cabinet a) Main circuit: AC 220V, 380V, DC 220V; b) auxiliary circuit: AC 220V, 380V, DC 220V; Electrical Switch Cabinet Production ... small size, convenient installation and maintenance. Switch Cabinet Voltage Switch Cabinet Rated working voltage (Ue) a) Main circuit: AC 220V, 380V, ... The main circuit rated insulation voltage 660V. Switch Cabinet Rated Current a) the level of bus (main busbar) ...