Separate Parts; Space Heater; Insulation Resistance; Exposed Machined Surfaces - WEG G Serie Manual De Instalación, Operación Y Mantenimiento

3.3.3.2 Separate parts


If there have been supplied spare parts (terminal boxes,
covers, etc.), these parts must be packed as specified
in items 3.3.3.1.1 and 3.3.3.1.2.

The relative humidity inside the package must not
exceed 50%.

3.3.3.3 Space heater

The space heaters of the alternator (if any) should remain
energized during the storage period to avoid condensation
of moisture inside of the alternator and thus ensure that
the insulation resistance of the windings remains at
acceptable levels.
ATTENTION
The alternator space heaters must be
connected when it is stored at room
temperature < 5 °C and / or relative humidity
> 50%.

3.3.3.4 Insulation resistance

During the storage period, the insulation resistance of the
windings of the stator and exciter rotor of the alternator must
be measured and recorded every three months prior to
installation of the alternator.
Any decrease in value of insulation resistance should be
investigated.

3.3.3.5 Exposed machined surfaces

All exposed machined surfaces (e.g., the shaft end, flange,
coupling disc) are protected at the factory with a
temporary protective agent (rust inhibitor).
This protective coating must be reapplied at least every 6
months or when it is removed and/ or damaged.
Recommended Products:
Name: Protective Oil Anticorit BW; Manufacturer: Fuchs.

3.3.3.6 Bearings

3.3.3.6.1 Shielded bearings (frame up to 315)

During the storage period, every two months, the locking
device of the shaft should be removed and rotated
manually to distribute the grease inside the bearing and
keep it in good conditions. If the alternator is kept in
storage for a period greater than two years, the bearings
should be replaced.
10680382 Installation, operation and maintenance manual – Synchronous Alternator – G line - Horizontal
3.3.3.6.2 Regreasable bearings (frame 355 and
larger)
The bearings are lubricated at the factory for testing.
During the storage period, every two months, the locking
device of the shaft should be removed and rotated
manually to distribute the grease inside the bearing and
keep it in good conditions. If the alternator is kept in
storage for a period greater than two years, the bearings
should be cleaned, inspected to ensure its integrity and
relubricated.
ATTENTION
If it is not possible to rotate the shaft of the
alternator, as recommended, check the
condition of the bearing before putting the
alternator into operation.

3.3.3.7 Terminal box

When the insulation resistance of the windings of the
alternator is measured, the main terminal box and the
other terminal boxes should also be inspected, especially
considering the following:

The inside must be dry, clean and free of dust
deposition;

The contacts must not be corroded;
 The seals should be in proper condition;

The inlet of the cables must be properly sealed in
accordance with the degree of protection of the
machine.
If any of these items is not correct, cleaning or
replacement of parts should be performed.

3.3.3.8 Inspection and records during storage

The alternator stored should be inspected periodically and
inspection records must be filed.
The following aspects must be inspected:
1. Physical damage;
2. Cleaning;
3. Signs of water condensation;
4. Conditions of the protective coating of machined
surfaces ;
5. Conditions of painting;
6. Signs of harsh agents;
7. Satisfactory operation of the space heaters (if any). . It
is recommended that an alarm or signaling system be
installed on site for detecting power interruption of the
space heaters;
8. It is recommended to register the temperature and
humidity surrounding the machine, the temperature of
the winding insulation resistance and the rate of
polarization;
9. Inspect the storage site that complies with the criteria
described in the item 3.3.3.1.
www.weg.net
l 19