Installation, operation and maintenance instructions
High voltage flameproof motors for explosive atmosphere
AMD Rg 355-400-450-500
Transport and storage cares of Electrical Machines
Issued by: MOLM
Sheet No.
3AAM101027 E
Rev. B
Page 1 of 3
01.2023
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Protective measures prior to transport
To protect the bearings against damage during
transport, the machines are provided with a shaft
locking device, irrespective of the method of transport
or distance.
Antifriction bearings are normally filled with grease at
the factory.
Sleeve bearings are bathed in oil during the test
before the delivery. This gives sufficient protection
against corrosion for even the longest transport
distances.
Machined metal surfaces, such as shaft extension,
are protected with an anticorrosive coating before
delivery.
Packing
Depending on the Customer request and the
transport conditions the machines can be delivered:
unpacked on a pallet
in a wooden box (sometime made with
impregnated wood)
sealed within closed protective packing
Sealed packing are used when the required transport
and storage period in the country of destination
exceeds 12 months. In contrast to the standard
packing, the machine parts are completely enveloped
in polyethylene wrappings the seams of which are
welded to make an air-tight seal. All sharp corners
and edges are padded to prevent the wrapping from
being punctured.
Check on arrival
When the transport Company delivers the machine to
the Customer, the responsibility for the handling
passes to the Customer or designated other party.
The machine shall be accurately inspected for
completeness (including the accessories) and
possible damages during transport, including the
packing. If damages are detected these must be
documented by photograph.
Any transport damage must be reported within one
week after arrival, if the transport insurance is to be
claimed. It is therefore important that evidence of
careless handling is checked and reported
immediately to the transport company and the
supplier.
Indoor storage
Machines with their associated accessories shall be
stored in their original containers.
Store rooms should be well-ventilated; the air should
be free of corrosive gases and as dry and clean as
possible. The relative humidity should possibly be
kept below 50%. Heat the store rooms if necessary so
that the temperature is about 10°C higher than that of
the outside air. The size of the rooms should permit a
safe and accessible storage arrangement. Take care
to protect the machines against possible insects such
as termites and rodents.
Check regularly the moisture content in the cases (if
any).
Pay attention to the carrying capacity of the floor.
Do not stack heavy goods on top of each other.
Always lay base frames, sole plates and similar
parts absolutely flat to prevent distortion. The
stored goods should not be overloaded by
stacking. The cases should be so arranged that the
case and component numbers could be clearly
read off. Related parts should be stored in the
sequence in which they are to be erected or
according to the component numbers. Machines
with rolling contact bearings are to be stored on
vibration-free floors. If vibrations of the floor is
present or may occur later (>0,2 mm/sec), the
machine should be isolated by placing rubber
blocks under the feet.
The prolonged and continuous pressure of the
rolling elements on their running surface can
damage the bearings over a long storage period.
To avoid this phenomena it is recommended to turn
the machine rotor for some revolutions every six
months of storage. To do this the shaft locking
device has to be loosened. Take care during the
retightening of the locking device to avoid possible
axial loads on the bearings. The tightening torque
for the fixing screws is 10 Nm max (7 lb-ft).
In case the machine would be provided with sealed
packing, this has to be locally opened and reclosed
after the rotation of the shaft.
Sleeve bearings do not require any shaft rotation
during storage because the actual bearing surfaces
will be dry i.e. the weight of the rotor will have
pressed the oil film out from between the journal and
the shell
In case of very long (several years) storage it is
recommended that the bearings will be opened
according to the dismantling instructions and that
the journals and linings inspected before
commissioning.
In case “non-contact” vibration probes should be
provided, extreme care has to be taken for
protection of the shaft machined surface under the
probes.
Outdoor storage
If indoor storage is impossible, store the cases
outdoors under cover of a weatherproof roof, or
alternatively cover them with weatherproof tarpaulins.
Tie down the tarpaulins.
Do not lay the tarpaulins directly on the cases; keep
them about 30 cm clear of the latter by draping them
on laths or a wooden frame, thus leaving a space for
ventilation.
The cases should be protected against damp ground
by placing them on battens or boards. A storage area
should be selected which offers maximum protection
against moisture (snow, floods), dirt, termites and
