8.5.2
Avoidance of damage to roller bearings during stoppages
Extended stoppages at the identical or almost identical resting position of the roller bearings
can lead to damage such as brinelling or formation of corrosion.
● During stoppages, regularly start the machine up for a brief period once a month, or at least
turn the rotor over several times.
If you have uncoupled the machine from the driven machine and secured the rotor with a
rotor shipping brace, then remove this before turning the rotor over or starting the machine
up.
Make sure that the resting position of the roller bearings after the rotor has been turned
over is different from what it previously had been. Use the fitted key or the coupling halves
as reference markers.
● During re-commissioning, refer to the information in the "Commissioning" section.
See also
8.5.3
Measurement of the insulation resistance after an extended stoppage
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 34)
Operation
8.5 Stoppages
SIMOTICS DC 1GH5
Operating Instructions 02/2016
69
Summary of Contents for SIMOTICS DC 1GH5
Page 2: ...08 02 2016 10 31 V4 00 ...
Page 12: ...Introduction 1 1 About these instructions SIMOTICS DC 1GH5 12 Operating Instructions 02 2016 ...
Page 50: ...Assembling 5 3 Installing the machine SIMOTICS DC 1GH5 50 Operating Instructions 02 2016 ...
Page 76: ...Operation 8 9 Faults SIMOTICS DC 1GH5 76 Operating Instructions 02 2016 ...
Page 98: ...Maintenance 9 2 Repair SIMOTICS DC 1GH5 98 Operating Instructions 02 2016 ...
Page 110: ...Spare Parts 10 7 Speed sensor SIMOTICS DC 1GH5 110 Operating Instructions 02 2016 ...
Page 114: ...Service and Support SIMOTICS DC 1GH5 114 Operating Instructions 02 2016 ...
Page 118: ...Quality documents SIMOTICS DC 1GH5 118 Operating Instructions 02 2016 ...
Page 128: ...Index SIMOTICS DC 1GH5 128 Operating Instructions 02 2016 ...
Page 129: ......