Measuring The Insulation Resistance During The Course Of Maintenance Work - Siemens SIMOTICS FD 1MQ1 Operating And Installation Instructions

Explosion hazard due to overheating of the machine caused by deposits of dust
Deposits of dust have a thermal insulation effect, 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 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 temperatures.
● In addition to the current-dependent overload protection device located in the three phases
Risk of explosion due to static charging
If you clean the machine with compressed air, plastic components may become statically
charged and create 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 plastic parts in an explosive atmosphere.
● When cleaning the machine, make sure that the air in the vicinity of the machine is free of
9.1.2

Measuring the insulation resistance during the course of maintenance work

Measuring the insulation resistance and polarization index (PI) provides information on the
condition of the machine. It is therefore important to check the insulation resistance and the
polarization index at the following times:
● Before starting up a machine for the first time
● After an extended period in storage or downtime
● Within the scope of maintenance work
SIMOTICS FD 1MQ1
Operating Instructions 01/2019
WARNING
WARNING
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.
For the alarm and shutdown temperatures, see the "Explanatory text for the machine
dimension drawing" section.
WARNING
gas and dust.
Maintenance
9.1 Inspection and maintenance
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