Description
3.4 Structure
1FT7 synchronous motors
18 Operating Instructions, 04/2010, 610.40075.40b
3.4.4 Environmental conditions
The following temperature ranges apply for natural-cooled and forced-ventilation motors.
● Permissible temperature range during operation: T = -15 °C to +40 °C
● Permissible temperature range during storage: T = -20 °C to +70 °C
For deviating conditions (ambient temperature > 40 °C or installation altitude > 1,000 m
above sea level) the permissible torque/power must be derived from the table below.
Ambient temperatures and installation altitudes are rounded-off to 5 °C or 500 m
respectively.
Table 3- 4 Power derating as a function of the installation altitude and ambient temperature
Ambient temperature in °C Installation altitude above
sea level [m]
< 30 30 - 40 45 50 55
1,000 1.07 1.00 0.96 0.92 0.87
1,500 1.04 0.97 0.93 0.89 0.84
2,000 1.00 0.94 0.90 0.86 0.82
2,500 0.96 0.90 0.86 0.83 0.78
3,000 0.92 0.86 0.82 0.79 0.75
3,500 0.88 0.82 0.79 0.75 0.71
4,000 0.82 0.77 0.74 0.71 0.67
3.4.5 Cooling
Natural cooling
The rated data only applies when the ambient temperature does not exceed 40 °C (104 °F)
as a result of the installation conditions.
To ensure sufficient cooling, a minimum clearance of 100 mm from adjacent components
must be observed on three sides.
To Next Page
Loading...
Need help?
General