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Cooling - Siemens SINAMICS S120 Configuration Manual

Synchronous motors.
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2.1.3

Cooling

1FK7 motors are self-cooled.
Operating temperature range: -15 °C to +40 °C (without any restrictions).
The power loss is dissipated through radiation and natural convection, which means that
adequate heat dissipation must be ensured by suitably mounting the motor.
All of the Catalog data refer to an ambient temperature of 40 °C, mounted so that the motors
are not thermally insulated and an installation altitude up to 1000 m above sea level.
If other conditions prevail (ambient temperature > 40 °C or installation altitude > 1000 m
above sea level), the permissible torque/power must be defined using the factors from
the following table (torque/power reduction according to EN 60034-6).
Ambient temperatures and installation altitudes are rounded-off to 5 °C or 500 m
respectively.
Table 2-3
Caution
The surfaces of synchronous motors can have temperatures > 100 °C. When required,
protective measures must be provided to prevent coming into contact with the motors.
Synchronous Motors 1FK7
Configuration Manual, (PFK7S), Edition 12.2006, 6SN1197-0AD16-0BP1
Power derating as a function of the installation altitude and the ambient temperature
Installation altitude
above sea level [m]
1000 1,07
1500 1,04
2000 1,00
2500 0,96
3000 0,92
3500 0,88
4000 0,82
Ambient temperature in °C
< 30
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
Application
2.1 Environment
50
55
60
0,92
0,87
0,82
0,89
0,84
0,79
0,86
0,82
0,77
0,83
0,78
0,74
0,79
0,75
0,70
0,75
0,71
0,67
0,71
0,67
0,63
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