Delta, 3 x 220/254/289Vac ±11.5Vac. Star, 3 x 380/440/500Vac ±20Vac. 24Vdc unregulated output. Safety isolating transformer to VDE0551, EN60742. 4.5kV input/output isolation. Shielding winding. Varistor protection and discharge resistor. Screw terminals o