T2X series, and generating a series of STC, five unique advantages. 1, multi-action phase composite structure circuit is simple, reliable, easy maintenance. 2, excellent dynamic performance, dumping load suddenly thought, not scintillation light line. 3, a strong start, even if 70% of full load capacity of the direct action of the induction motor, the lines are not tripping. 4, the quasi - sine wave voltage stabilizing and good performance computers are used safely. 5, assume unbalanced load, unbalanced three-phase voltage is less than 3%