The QSG/SG single-phase/three-phase dry-type isolation transformer is a new generation of energy-saving power transformer developed and manufactured by our factory based on international counterparts and combined with my country's national conditions. It ranges from 300VA to 1600KVA and conforms to international and national standards such as EC439 and GB5226. The windings are manufactured using a de-molding and aligned winding method; the transformer undergoes vacuum impregnation, achieving an insulation class of F or H. The product performance reaches advanced levels both domestically and internationally. The OSG/SG series three-phase dry-type isolation transformers are widely applicable to AC 50Hz to 60Hz circuits with voltages below 2000V. They are widely used in imported important equipment, precision machine tools, electromechanical equipment, medical equipment, rectifiers, lighting, etc. Various input and output voltage levels, connection groups, the number and position of adjustment taps (generally 5%), winding capacity distribution, secondary single-phase winding configuration, rectifier circuit application, and whether an enclosure is required can all be meticulously designed and manufactured according to user requirements.