Main Unit : 0.75 Hp, 440 Volt, 3 Phase, 4 Wire System, 50 Hz Optional Accessories (3 Pumps - Pumping Station ) 2.25 Hp, 440 Volt, 3 Phase, 4 Wires System , 50 Hz (Electrical Loading Platform) 0.25 Hp, 440 Volt. 3 Phase, 4 Wire System, 50 Hz