... constant voltage; 3.good cost performance Series three(Single) A.C. synchronous generator Verified Information This information is Verified by Bureau ... -5, 8, 10, 12, 15, 20, 24, 30, 40, 50, 64, 75, 90, 100,120, 150, 160, 180, 200, 250, 280 ... -5, 8, 10, 12, 15, 20, 24, 30, 40, 50, 64, 75, 90, 100,120, 150, 160, 180, 200, 250, 280 ...