... Phase) Serial voltage regulators, the fourteenth generation of energy-saving products of electromechanical industry, own the features of voltage regulating, ... designs of TDGC2J, TSGC2J, which belong to the old type products, show the type of round; while the TDGC2 and TSGC2, ... the new type products, show the type of square, with the excellent and exquisite overall ...