Siemens 611 configurationmanual Protecting the motor components, Degree of protection

Motor assembly 6.2 Protecting the motor components

6.2Protecting 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.

1FW6 Built-in torque motors	101
Configuration Manual, 05/2009, 6SN1197-0AD00-0BP7