Siemens TV Converter Box 611 User Manual

Page of 324
 
Motor assembly 
 
6.2 Protecting the motor components 
1FW6 Built-in torque motors 
Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7 
101
 
6.2 
Protecting the motor components 
Degree of protection 
The machine construction surrounding the motor must fulfill at least degree of protection 
IP54 (to EN 60529). 
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. 
 
WARNING 
 
Contamination in the motor compartment can cause the motor to stop functioning or cause 
wear and tear.