Power of a motor given as in a producers specification is actual for work without breaks by nominal power supply and frequency in temperatire of environment maximum 40oC at heigth 1000m. In case of different environment conditions the power of motor should be changed according to data in the table.

If the temperature and heigtg vary at the same time, proper values should be multiplicated by values given in % in table.

Temperature of environment oC<30o power = 106
Temperature of environment oC 40o power = 100
Temperature of environment oC 45o power = 97
Temperature of environment oC 50o power = 93
Temperature of environment oC 55o power = 90
Temperature of environment oC 60o power = 87

Heigth <1000 : power % = 100
Heigth 1500 : power % = 97
Heigth 2000 : power % = 93
Heigth 2500 : power % = 90
Heigth 3000 : power % = 87
Heigth 4000 : power % = 79

Simultaneously with changes of power are changing features like Ma/Mn.
If power will decrease more than 15% then a special winding should be used.