... furnace Color: like picture or depend on customer Power Transformer(30~30000KVA) I. Main Functions And Features They are widely used ... of rectifying devices, most industrial DC power sources is transformed from an AC network via rectifying devices consisting of a rectiformer ... secondary winding phase difference can be designed to 30°,15° , 7.5° , for rectification of 6-phase, 12-phase,24-phase and 48 ...