... . 3. ISO 9001 4. High performance Specification: 1, Power: 0.75kw(1HP)-315kw(420HP) 2, Voltage: 220V, 380V, 440V, ... 480V, 660V 3, Frequency: 50Hz/60Hz 4, Pole: 2/4/6/8 5, Speed: 2800r/m, 1440r/m, 980r/m, 710r ... /m 6, Frame size: 71-355 7, Insulation class: B/F 8, Protection class: IP44/IP549, Working type: S1 Single-Phase Electric Motors