Technical data 115Ambient temperature deratingIn the temperature range +40…55 °C (+104…131 °F), the rated output current is deratedby 1% for every added 1 °C (1.8 °F) as follows. Calculate the output current by multiplyingthe current given in the rating table by the derating factor.Altitude deratingAt altitudes from 1000 to 4000 m (3300 to 13123 ft) above sea level, the derating is 1% forevery 100 m (328 ft). For a more accurate derating, use the DriveSize PC tool.Deratings for special settings in the drive control programSwitching frequencies other than 1.5 kHz can require output current derating. If youchange the minimum switching frequency with parameter 97.02 Minimum switchingfrequency, calculate the derated output current by multiplying the current given in therating table by the derating factor given in the table below.Note: Changing the value of parameter 97.01 Switching frequency reference does notrequire derating.For more information, contact local ABB.Frame size Derating factor (k) for the minimum switching frequencies1 kHz 2 kHz 4kHz 8 kHzR10 1 0.92 0.78 0.58R11 1 0.92 0.78 0.581.000.85+40 °C +55 °C+104 °F +131 °FDerating factorAmbient temperature
