8.5.1 Measures in non-operational periods
● Keep the motor dry using anti-condensation heating.
● After prolonged periods of non-operation and during commissioning at very low ambient
temperatures (≤ 0 °C), the anti-condensation heating is not sufficient. Therefore, heat the
interior of the machine additionally by heating the field winding with 30 % of the rated field
current without ventilation for at least 30 minutes. This will keep the interior of the motor
free of ice and dry.
● Take care with motors using water cooling to avoid possible problems with corrosion and
freezing. Follow the operating instructions provided by the heat exchanger manufacturer.
● During prolonged periods of non-operation, operate the motor regularly, at least once
monthly. Alternatively, turn the rotor as a minimum.
NOTICE
Bearing damage due to external factors
Where cylindrical-roller bearings are used, bearing damage can be caused by external
vibration.
Consult the manufacturer for details of suitable corrective action.
NOTICE
Damage due to improper storage
Damage may occur to the motor if it is not stored properly.
If the machine is to be taken out of operation for more than 12 months, suitable anti-corrosion,
preservation, packaging, and drying measures must be taken.
Decommissioning
You will find detailed information about the necessary measures to be taken in the
"Transportation and storage (Page 25)" section.
Recommissioning
● When restarting the motor after a long period of non-operation, perform the measures
recommended in section "Commissioning (Page 61)."
● If the machine has been non-operational for longer than a year, regrease the bearings
before commissioning. Turn the shaft to distribute the grease in the bearings.
● Pay attention to the instructions on the lubricant plate.
Operation
8.5 Stoppages
SIMOTICS DC 1GG5
72 Operating Instructions 02/2016
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