... ; 3)CE/CCC/ISO certificates 3Phase Automatic or Manual Transfer Switches for Generator1)rated voltage:AC220,380,400,440,660V 50 ... switch adopts electromagnetic drive, C type adopt double coil DC impulse, the power of the controller is 220VAC of main and ... /4.2working cycle(s/times)10 3Phase 100A Automatic Transfer Switches for Generator