Siemens SIMOTICS S-1FK2 - Mechanical Properties; Cooling

Mechanical properties
3
3.1 Cooling
The 1FK2 is a non-ventilated motor.
To ensure su󹪟cient heat dissipation when installed, the motor requires a minimum clearance of
100 mm from adjacent components on three sides.
• Maintain theses clearances irrespective of the following mounting variants.
Non-thermally insulated mounting
Some of the motor power loss is dissipated through the 󹪞ange when the motor is connected to
the mounting surface.
• Observe the following mounting conditions for the speci󹪝ed motor data:
Shaft height Steel plate, width x height x thickness (in mm)
1FK2☐03 250 x 250 x 6
1FK2☐04
1FK2☐05 300 x 300 x 12
1FK2☐06
450 x 370 x 30
1FK2☐08
1FK2☐10
The data in the table refers to an ambient temperature of 40 °C and an installation altitude up
to 1000 m above sea level.
If the ambient conditions are di󹪜erent, derating may be required. You can 󹪝nd information on
this in the section "Derating factors (Page 28)".
For larger mounting surfaces, the heat dissipation conditions improve.
Thermally insulated mounting without additional mounted components
For self-cooled motors, you must reduce the S1/characteristic curve as follows:
Reduce the motor static torque by 20 % to 30 %.
Reduce the torque at 3000/minute static torque by 40 % to 50 %.
Thermal motor protection
The converter monitors the motor temperature based on a thermal motor model and issues the
alarm "Motor overtemperature" before the maximum temperature is reached. If the motor
exceeds the maximum temperature, the converter switches o󹪜 the motor with the error
message "Motor overtemperature".
1FK2 Synchronous Motors for SINAMICS S120
Con󹪝guration Manual, 02/2022, A5E46927724B AD 35