Ambient Conditions; Cooling - Siemens 1FK7 Series Operating Instructions Manual
Synchronous motor
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Also See for 1FK7 Series:
- Configuration manual (252 pages) ,
- Instructions manual (156 pages)
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Description
3.4 Design
3.4.4
Ambient conditions
The following temperature ranges apply to naturally-cooled motors.
● Permissible temperature range in 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 > 1000 m
above sea level) the permissible torque/power must be determined from the following table.
Ambient temperatures and installation altitudes are rounded off to 5°C and 500 m
respectively.
Table 3- 4
Installation altitude above
sea level [m]
1000
1500
2000
2500
3000
3500
4000
NOTICE
What has to be observed when installing the motors
1FK7 motors are not suitable for operation
in salt-laden or corrosive atmospheres
outdoors
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 at three lateral surfaces.
16
Power derating as a function of the installation altitude and ambient temperature
Ambient temperature in °C
< 30
1.07
1.04
1.00
0.96
0.92
0.88
0.82
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, 03/2011, 610.40700.40c
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
Synchronous Motors 1FK7
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