9.2 Inspection and maintenance
9.2.1 Safety instructions for inspection and maintenance
Explosion hazard due to overheating of the machine caused by a layer of dust
Deposits of dust have a thermal insulation eect, which can lead to the machine overheating.
The maximum surface temperature of the machine cannot be adhered to. The dust can ignite,
resulting in an explosion. This can result in death, serious injury or material damage.
• Dust the machine regularly.
• Do not allow dust layers thicker than 5mm to build up on the machine surface.
• Do not switch the machine on until the dust has been removed.
Risk of explosion due to excessive bearing temperature
The surface temperature cannot be maintained within maximum permissible limits if the
bearing becomes too hot. The dust can ignite, resulting in an explosion. This can result in death,
serious injury or material damage.
• Monitor the bearing temperature (Page99).
• In addition to the current-dependent overload protection system located in the three phases
of the connecting cable, we recommend that you also monitor the temperature rise in the
machine using temperature sensors integrated in the stator winding.
Risk of explosion if the permissible axial and radial forces are exceeded
• Carefully comply with the permissible values for axial and radial forces (Page31).
• For cylindrical rolling bearings, carefully comply with the minimum radial load levels.
• In operation, comply with the permissible vibration values in accordance with ISO 10816-3.
Risk of explosion as a result of premature bearing failure
• Use insulated bearings if bearing currents occur. Carefully comply with the information in
Chapter Converter operation
• Carefully comply with the specied grease change intervals, relubrication intervals and oil
change intervals.
Maintenance
9.2Inspection and maintenance
1MB..1/2/3/4 - shaft heights 63 ... 355
116 Operating Instructions, 11/2023, A5E52779900A
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