... . According to user's requirements, the secondary winding phase difference can be designed to 30°,15° , 7 ... .5° , for rectification of 6-phase, 12-phase,24-phase and 48-phase.Way of voltage regulation: No-excitation regulation ... Dry-type Transformer, ZGS Pad -- Mounted, YB Series Cubicle-type Substation, Furnace Transformer, Rectifier Transformer, Power Transformer, Distribution Transformer and so ...