Crane duty motor, Ambient Temperature -10 to +50 degree C Altitude Not exceeding 1000mtrs above mean sea level. Atmosphere Non Corrosive & non Hazardous Relative Humidity Up to 100% Voltage 415V ?10%, 3 Ph. Frequency 50Hz ?5% Combined Variation 10% Duty S3, S4 & S5 (Refer KHD-50-33R2) Service factor 1.0