Machine Overheating Caused By Dust - Siemens SIMOTICS M-1PH8 Operating Instructions & Installation Instructions

Operation

8.2 Machine overheating caused by dust

Faults in operation
Deviations from normal operation such as increased power consumption, temperatures or
vibrations, unusual noises or odors, tripping of monitoring devices, etc., indicate that the
machine is not functioning properly. This can cause faults which can result in eventual or
immediate death, serious injury or material damage.
● Immediately inform the maintenance personnel.
● If you are in doubt, immediately switch off the motor, being sure to observe the system-
CAUTION
Risk of corrosion due to condensate
Humid air can condense inside the machine during operation as a result of intermittent duty
or load fluctuations. Condensate can collect inside the motor. Damage such as rust can result.
Make sure that any condensation can drain away freely.
8.2 Machine overheating caused by dust
Explosion hazard due to overheating of the machine caused by a layer of dust
Layers of dust thicker than 5mm can insulate the machine, resulting in 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 5 mm 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.
● Always check the bearing temperature.
● In addition to the current-dependent overload protection device located in the three phases
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WARNING
specific safety conditions!
WARNING
WARNING
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.
Operating Instructions 05/2012 A5E03986435A AA
SIMOTICS M-1PH8