If ambient temperature is below +40 °C (+104 .°F), the derating can be reduced by 1.5%for every 1 °C reduction in temperature. Curves with derating factors from 1.00 to 0.80 areshown below. For a more accurate derating, use the DriveSize PC tool. A few altitudederating curves are shown below.Installation site altitude1500 m1000 m+25 °C +30 °C+77 °F +86 °F+40 °C+104 °F+35 °C+95 °F+20 °C+68 °F3300 ft4921 ft2000 m6562 ft2500 m8202 ft3000 m9842 ft3500 m11429 ft4000 m13123 ft1.000.950.850.900.80Ambient temperature￭ Deratings for special settings in the drive control programIf you change the minimum switching frequency with parameter 97.02 Minimum switchingfrequency, multiply the output current given in Ratings (page 149) by the coefficient valuegiven in this table.8 kHz4kHz2 kHz1.5 kHzFrame size0.660.840.971.00R60.710.890.981.00R70.610.820.961.00R80.58*0.79*0.95*1.00*R90.580.780.921.00R100.580.780.921.00R110.580.780.921.00R110.580.780.921.00R11* current derating for -0414A-4 and -0430A-4 at 35 CNote:Technical data 153
