Three-phase power transformers are widely used in industrial plants that operate medium-voltage feeders, large motors, VFDs, compressors, refining equipment, smelters, cement kilns, mining rigs, and heavy manufacturing lines. They step utility MV down to usable LV levels (e.g., 480/400/208 V) and also support plant microgrids. Their three-phase configuration ensures balanced currents, lower copper usage, and better efficiency than single-phase banks for continuous industrial duty.