Siemens LOHER CHEMSTAR 1PS2, Operating Instructions And Installation

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● The operating conditions match the data provided in accordance with the technical
documentation, such as degree of protection, ambient temperature, etc..
● Moving parts, for example the coupling, move freely.
● All touch protection measures for moving and live parts have been taken.
● The air leakage filters are installed and function correctly.
● The rotor can spin without coming into contact with the stator.
● The bearing insulation is not bridged.
● Appropriately configured control and speed monitoring functions ensure that the the
permissible speeds specified on the rating plate cannot be exceeded.
● Any supplementary motor monitoring devices and equipment have been correctly
connected and are fully functional.
Electrical connection
● The grounding and equipotential bonding connections have been made correctly.
● The machine is connected so that it rotates in the direction specified.
● Appropriately configured control and speed monitoring functions ensure that the motor
cannot exceed the permissible speeds specified in the technical data. For this purpose,
compare the data on the rating plate or, if necessary, the system-specific documentation.
● The minimum insulation resistance values are within tolerance.
● Minimum air clearances have been maintained.
● Any supplementary motor monitoring devices and equipment have been correctly
connected and are functioning correctly.
● All brakes and backstops are operating correctly.
● At the monitoring devices, the values for "Warning" and "Shutdown" are set.
7.2 Insulation resistance and polarization index
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
The following information is provided regarding the state of the winding insulation:
● Is the winding head insulation conductively contaminated?
● Has the winding insulation absorbed moisture?
Start-up
7.2 Insulation resistance and polarization index
LOHER CHEMSTAR 1PS2
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Operating Instructions 08/2016