Rated output for continuous duty. (S1) Rated voltage 220V/380V, 380V/660V Frequency 50 or 60 Hz Ambient temperature -15 C to +40 C The installation height up to 1000m above sea level Insulation class F and temperature rise is for class B. Protection degree IP 55. “GUISELEY” motors are manufactured in the range of “EFF.2” (improved efficiency)