Power derating

Ambient temperature

Power derating 1:

f_T = Temperature utilisation factor

t_A = Ambient temperature in °C

Calculation of the power data when exceeding the specified temperature limit > 40 °C:

F_{CA_red} = F_CA x f_T

Installation altitude

Power derating 2:

f_H = Altitude utilisation factor

h = Altitude in metres

Calculation of the power data when exceeding the specified installation altitude > 1000 m:

F_{CA_red} = F_CA x f_H

Ambient temperature and installation altitude

Calculation of the power data when exceeding the specified limits:
Ambient temperature > 40 °C and installation altitude > 1000 m
F_{CA_red} = F_CA x f_T x f_H