Siemens SIMOTICS T-1FW68, Configuration Manual

Page: 35 / 194

Description of the motor
2.3 Technical features and ambient conditions
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
33
WARNING
Risk of rotor segment magnets causing crushing injuries
The forces of attraction of magnetic rotor segments act on materials that can be
magnetized. The forces of attraction increase significantly close to the rotor segments.
The tripping threshold of 3 mT for risk of injury due to an attraction and projectile effect
is reached at a distance of 300 mm (Directive 2013/35/EU). Rotor segments and
materials that can be magnetized can suddenly slam together unintentionally. Two rotor
segments can also unintentionally slam together.
There is a significant risk of crushing when you are close to a rotor segment.
Close to the rotor segment, the forces of attraction can be several kN - example:
Magnetic attractive forces are equivalent to a force of 100 kg, which is sufficient to trap
a body part.
• Do not underestimate the strength of the attractive forces, and work very carefully.
• Wear safety gloves.
• The work should be done by at least two people.
• Do not unpack the rotor segment until immediately before assembly.
• Never unpack several rotor segments at the same time.
• Never place rotor segments directly next to one another without taking the
appropriate precautions.
• Never carry any objects made of magnetizable materials (for example watches, steel
or iron tools) and/or permanent magnets close to the rotor segment! If tools that can
be magnetized are still required, then hold any tool firmly using both hands. Slowly
bring the tool to the rotor segment.
• Immediately mount the rotor segment that has just been unpacked.
• Use special mounting equipment when mounting stator segments and rotor
segments. Always comply with the specified procedure.
• Keep the following tools at hand to release parts of the body (hand, fingers, foot
etc.) trapped between two components:
– A hammer (about 3 kg) made of solid, non-magnetizable material
– Two pointed wedges (wedge angle approx. 10 ° -15 ° , minimum height 50 mm)
made of solid, non-magnetizable material (e.g. hardwood)