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3.2.3.7
Terminal box
When the alternator winding insulation resistance is
measured, the main terminal box and the other terminal
boxes must be inspected, considering especially the
following aspects:
The inside must be dry, clean and free of dust
accumulation;
The contacts cannot present corrosion;
The seals must be in proper conditions;
The cable inputs must be properly sealed according to
the machine degree of protection.
If applicable of these items is not correct, the parts
must be cleaned or replaced.
3.2.3.8
Inspections and records during storage
Stored alternators must be periodically inspected and
inspection records must be filed.
The following points must be inspected:
1. Physical damages;
2. Cleanliness;
3. Signs of water condensation;
4. Conditions of the protective coating of the machined
parts;
5. Paint conditions;
6. Signs of worms or insect action;
7. Satisfactory operation of space heaters (if any). It is
recommended that a signaling system or alarm be
installed in the location in order to detect power
interruption in the space heaters;
8. It is recommended to record the ambient temperature
and air relative humidity around the machine, winding
temperature, insulation resistance and polarization
index;
9. The storage location must also be inspected so as to
ensure its compliance with the criteria described in the
item 3.2.3.1
.
3.2.3.9
Preparation for commissioning
3.2.3.9.1 Cleaning
Alternator inner and outer parts 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 the bearings and cavities used for lubrication
are free of dirt and the cavity plugs are correctly sealed
and tightened. Oxidations and marks on the bearings
and shaft seats should be carefully removed.
3.2.3.9.2 Bearing lubrication
Use the specified lubricant to lubricate the bearing.
The information on bearings and lubricants, as well as the
procedure for lubrication, are described in item 6.5 of this
manual.
3.2.3.9.3 Checking the insulation resistance
ATTENTION
Before operating the alternator, the insulation
resistance must be measured according to
the item "Insulation resistance" of this
manual.
3.2.3.10 Cooling system
For water-cooled alternators, if they remain out of
operation for a long time, it must be ensured the water
runs freely in the alternator cooling circuit before starting it
again.
3.2.3.11 Others
Follow the other procedures described in the item 5 in this
manual before performing the start-up of the alternator.
Installation, operation and maintenance manual
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