18 l
Installation, operation and maintenance manual – Squirrel cage motor – WGM20 Line 14108242
3.3.3.11
Maintenance plan during storage
During the storage period, the motor maintenance must be performed and recorded according to the plan described in
Table 3.1.
Table 3.1: Storage plan
Monthly
2
months
6
months
2 years
Before
start-up
Notes
STORAGE LOCATION
Inspect the cleanliness conditions
X
X
Inspect the humidity and temperature
conditions
X
Inspect for insect infestation signs
X
PACKAGE
Inspect for damages
X
Check the internal relative humidity
X
Replace the desiccant in the package (if any)
X
Whenever necessary.
SPACE HEATER
Check the operating conditions
X
Measure the circuit voltage and frequency
X
Check the function of the signal system (if
any)
X
WHOLE MOTOR
Perform external cleaning
X
X
Check the painting conditions
X
Check the rust inhibitor on the exposed
machined parts
X
Reapply the rust inhibitor
X
Drain the water condensed inside the motor
(if any)
X
Complete predictive maintenance
According to item 3.3.3.10
WINDINGS
Measure the winding temperature
X
X
Measure the insulation resistance
X
X
Measure the polarization index
X
X
TERMINAL BOX AND GROUNDING TERMINALS
Clean the interior of the terminal boxes
X
X
Inspect the seals and gaskets
X
X
BEARINGS
Rotate the shaft
X
Relubricate the bearing
X
Disassemble and clean the bearing
If the storage period exceeds 2
years.
3.3.4
Preparation for commissioning
3.3.4.1
Cleaning
The internal and external parts of the motor must be
free of oil, water, dust and dirt.
Remove the rust inhibitor from the exposed surfaces
with a cloth damped in a petroleum-based solvent;
Make sure that the bearings and cavities used for
lubrication are free of dirt and that the cavity plugs are
correctly sealed and tightened. Oxidation and marks on
the bearing seats and on the shaft must be carefully
removed.
3.3.4.2
Bearing lubrication
Use the lubricant specified for bearing lubrication.
Information on the bearings and lubricants are indicated
on the bearing nameplates, and the lubrication must be
done as described in section 7.10
of this manual, always
considering the type of bearing.
3.3.4.3
Insulation resistance verification
Before putting the motor into operation, the insulation
resistance must be measured according to section 4.4.3
of this manual.
3.3.4.4
Cooling system
If the motor remains out of operation for a long term (two
months or more), it must be ensured that water circulates
freely through the motor cooling system, before putting
the motor in operation.
3.3.4.5
Others
Follow the other procedures described in section 6 of this
manual before putting the motor into operation.
