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Description
3.4 Structure
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
Installation altitude above
sea level [m]
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.
18
Power derating as a function of the installation altitude and ambient temperature
< 30
1,000
1.07
1,500
1.04
2,000
1.00
2,500
0.96
3,000
0.92
3,500
0.88
4,000
0.82
Ambient temperature in °C
30 - 40
45
1.00
0.96
0.97
0.93
0.94
0.90
0.90
0.86
0.86
0.82
0.82
0.79
0.77
0.74
Operating Instructions, 04/2010, 610.40075.40b
50
55
0.92
0.87
0.89
0.84
0.86
0.82
0.83
0.78
0.79
0.75
0.75
0.71
0.71
0.67
1FT7 synchronous motors
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