Commissioning; Insulation Resistance And Polarization Index; Checks To Be Carried Out Prior To Commissioning - Siemens SIMOTICS M-1PH8 Operating Instructions & Installation Instructions

Commissioning

When carrying out any work on the machine, observe the general safety instructions
(Page 13) and the specifications contained in DIN EN 50110‑1 as regards working safely with
and on electrical machines.
7.1

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?
As such, you can determine whether the machine needs commissioning or any necessary
measures such as cleaning and/or drying the winding:
● Can the machine be put into operation?
● Must the windings be cleaned or dried?
Detailed information on testing and the limit values can be found here:
"Testing the insulation resistance and polarization index" (Page 46)
7.2

Checks to be carried out prior to commissioning

Once the system has been correctly installed, you should check the following prior to
commissioning:
Note
Checks to be carried out prior to commissioning
The following list of checks to be performed prior to commissioning does not claim to be
complete. It may be necessary to perform further checks and tests in accordance with the
specific situation on-site.
SIMOTICS M-1PH8
Operating Instructions 05/2012 A5E03986435A AA
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