Operation
8.1 Safety instructions for operation
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
102 Operating Instructions, 06/2018, A5E44455710A
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 temperatures.
• In addition to the current-dependent overload protection device located in the three
phases of the connecting cable, we recommend that you also monitor the temperature
rise in the machine with the aid of the temperature sensors built into the stator winding.
• You will find the alarm and shutdown temperatures in the Technical Data.
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!
Safety instructions relating to ventilation and cooling
Forced ventilation (optional): Type of cooling IC 416 in accordance with EN / IEC 60034-6
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.
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
protective grating.
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