Power derating

Derating may be necessary at high ambient temperature or when operating at a great height above sea level. In addition, some servo drives may experience power reductions depending on the feedback system installed or the holding brake [+]. The reduction affects the standstill current and the standstill torque.

Ambient temperature

fT = Temperature utilization factor

tA = Ambient temperature in °C

Calculation of the performance data if the specified temperature limit > 40 °C to 55 °C is exceeded:

M0_red = M0 x fT

Installation altitude

fH = Altitude utilization factor

h = Altitude in meters

Calculation of the performance data if the specified installation altitude is exceeded > 1000 m to 3000 m:

M0_red = M0 x fH

Ambient temperature and installation altitude

Calculation of the power data when exceeding the specified limits:

Ambient temperature > 40 °C, altitude > 1000 m and < 3000 m:

M0_red = M0 x fT x fH