The primary objective of this research is to design a three-phase distribution transformer that reduces technical losses within the electrical distribution system. These losses translate into costs associated with energy dissipation. While it’s impossible to eliminate these losses entirely, the aim is to optimize system efficiency. The focus is on the 220 V secondary voltage level. The research resulted in a transformer with losses of 4.6882 W, which complies with IEEE standards. The design features a cruciform morphology, operates at 13.2 kV, and has a total surface area of 9660 mm2. The core material is mu-metal, and the coil material is copper. The applied design methodology includes a 2^∧4 factorial design, and simulation is performed using ANSYS Maxwell, evaluating sixteen combinations. The design with the lowest power loss is selected as the optimal choice, effectively reducing technical losses in the electrical system.