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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.
• Always check the bearing temperature.
• In addition to the current-dependent overload protection device located in the three
To ensure problem-free machine cooling, the air ducts (ventilation grilles, channels, cooling
fins, tubes) must be free of pollution.
Risk of explosion when cleaning with compressed air
If you clean the machine with compressed air, plastic components may become statically
charged and ignite a potentially explosive atmosphere; an explosion can occur. This can
result in death, serious injury or material damage.
• Do not use compressed air to clean motors when installed in hazardous zones!
8.1.3
Safety note for ventilation
Risk of injury when touching the fan
There is a risk of injury at machines equipped with a fan cover (e.g. on machines in the
textile industry), as the fan is not completely touch protected.
• Do not touch the rotating fan.
• Do not put your fingers into the larger air discharge openings.
• Prevent manual intervention by using suitable measures, e.g. appropriate housings or a
Forced ventilation (optional): Type of cooling IC 416 in accordance with EN / IEC 60034-6
Risk of burning
Operating the machine without external fan results in overheating. This may result in death,
personal injury and material damage.
• Never commission the machine without an external fan.
1MB155 / 1MB555
Operating Instructions, 03/2018, A5E41926185A
WARNING
phases of the connecting cable, we recommend that you also monitor the temperature
rise in the motor with the aid of the temperature sensors built into the stator winding.
WARNING
CAUTION
protective grating.
WARNING
8.1 Safety instructions for operation
Operation
97
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