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9.2.4
Regreasing intervals
NOTICE
Damage to roller bearings
The regreasing intervals for roller bearings are different from the servicing intervals for the
machine. Failure to regrease the rolling-contact bearings at the specified intervals can result
in them sustaining damage.
● Comply with the regreasing intervals for roller bearings. The regreasing intervals are
9.2.5
Changing bearings when using permanently lubricated rolling-contact bearings
The replacement of the permanently lubricated roller bearing is determined by the number of
operating hours and is required around every three years.
9.2.6
Maintenance
When carrying out any work on the machine, observe the general safety instructions
(Page 15) and the specifications contained in EN 50110‑1 regarding safe operation of electrical
equipment.
9.2.6.1
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
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 50)
SIMOTICS M-1PH8 1PH818., 1PH822., 1PH828.
Operating Instructions 10/2017
specified on the lubricant plate.
Maintenance
9.2 Inspection and maintenance
109
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