Commutating Controlling Unit Series STQ(M)L in Rated Voltage Controlled mode
This product series works to step down three-phase AC power supply by transformer and then achieve DC 220V voltage through bridge commutating apparatus. The unit consists of auto air switch, transformer, two-phase or three-phase bridge rectifier assembly and AC contactor. The circuit configures short-circuit and over voltage protection devices. A rectiformer will be attached outside under handling capacity of electromagnet more than 19KW,while using single phase bridge commutating mode under handling capacity of electromagnet less than or equal to 4KW.