Degree Of Protection - Siemens SIMOTICS T-1FW6 Series Configuration Manual

Mechanical properties

3.2 Degree of protection

Note
Thermal expansion of the motor
Depending on the load and duty type, the average temperature in the stator and rotor can
reach 120 °C. Temperature changes in the stator and rotor can cause the motor components
to expand.
• You must take into account the amount of heat transferred into the machine structure as
well as the radial and axial thermal expansion of the motor when designing the machine.
3.2 Degree of protection
NOTICE
Damage to the motor caused by pollution
If the area where the motor is installed is polluted and dirty, then the motor can malfunction
and clog up.
• Keep the area where the motor is installed free of all dirt and pollution.
The machine construction surrounding the motor must fulfill degree of protection IP54 to
EN 60529 as a minimum.
The degree of protection for built-in motors is governed by the surrounding machine
construction. The better the motor installation space is protected against the ingress of
foreign particles (ferromagnetic particles), the longer the service life.
In particular, foreign particles in the air gap between the stator and rotor can destroy the
motor during operation.
This also applies to corrosive chemicals (e.g. coolants, oil) that could penetrate the motor
compartment. Corrosive chemicals can damage the magnetic bonds of the rotor.
Liquids can compromise the insulation resistance of the stator.
The thermal properties of the motor are influenced by the ingress of liquids and foreign
particles.
1FW6 torque motors have degree of protection IP23.
46
Naturally cooled 1FW6 built-in torque motors
Configuration Manual, 07/2017, 6SN1197-0AE01-0BP3