... the output silicon controlled a bidirectional thyristor output with two type of one-way silicon controlled ... (2).2, (3) (4) for module with internal department transformer primary, there are 220 VAC and ... V or so for adjustable area, that is, with the increase of the control voltage, the voltage ... , type of single-phase voltage HY-H50D75 module, which (1) and (2) the load series received transformer sub ...