Siemens SIMOTICS XP 1MB5 Series Operating Instructions Manual page 108

Maintenance
9.2 Inspection and maintenance
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
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 due to static charging
If you clean the motor, 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.
● When cleaning ensure that there is absolutely no explosive atmosphere present.
● Clean the plastic parts and components so that absolutely no static charging occurs
● Do not use compressed air for cleaning.
Danger as a result of stationary parts under voltage (live parts)
Live parts represent a hazard. Touch protection against active (live) parts is no longer
guaranteed if covers are removed. The minimum air and creepage distances may be fallen
below (violated) when coming close to active parts. Touching or coming close can result in
death, serious injury or material damage.
● Take the machine out of operation.
● Switch off the machine and ensure that it is in a no-voltage condition. Carefully comply with
the "5 safety rules" (Page 11).
● Only open the terminal box when the motor is stationary and in a no voltage condition.
Risk of injury due to rotating parts
Rotating parts are dangerous. Touch protection against rotating parts is no longer guaranteed
if covers are removed. Touching rotating parts can result in death, serious injury or material
damage.
● Before carrying out any repair work on the machine, take it out of operation, and carefully
lock it out so that it cannot be switched on again.
● Only remove the covers when the rotating parts have come to a complete standstill.
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Operating Instructions, 05/2019, A5E45959221A
1MB5 SH 400/450