Nidec LSA 52.3 - Air Filters; Transport Locking System; General Information; Machines with Bearings

Electric Power Generation
Installation and maintenance
5382 en - 2022.11 / h
LSA 52.3 / LSA 53.2 / LSA 54.2
Industrial Range Alternators
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9
2.10 AIR FILTERS
Only use approved filters. Any filter not correctly
engineered may conduce to air flow restriction and then to
abnormal generator cooling or to dust entering the
generator.
2.12 TRANSPORT LOCKING SYSTEM
2.12.0 General information
With certain types of machines, the alternator comes with a
rotor locking system for transport.
The locking systems must be removed just before the final
installation of the alternator and reinstalled if the alternator
is later re-transported. It is recommended to lock the rotor
during transport.
NOTE:
The locking systems are painted red or yellow.
CAUTION:
THE ROTOR LOCKING SYTEM MUST REMAIN IN
PLACE IF THE ALTERNATOR IS GOING TO BE
TRANSPORTED.
NOTE:
Maritime and rail transport are particularly demanding
for the alternator.
2.12.1 Machines with bearings
2.12.1.0 General information
In case of re-use of the locking system for transport, the
system must be reinstalled taking care not to touch any
parts other than the shaft. If necessary, rotate the shaft so
that the locking system does not touch the rotor cables.
CAUTION:
THE ROTOR LOCKING FASTENING SCREW MUST BE
TIGHTENED TO THE NOMINAL RECOMMENDED
TORQUE (see chapter 5.6).
NOTE:
PMGs have very low air gaps, and may be damaged
during the installation of the transport locking system.
CAUTION:
FOR SINGLE-BEARING PMG MACHINES, THE PMG
ROTOR MUST BE DISASSEMBLED BEFORE
INSTALLING ANY LOCKING SYSTEM FOR
TRANSPORT.
NOTE:
Leroy-Somer only provides the transport system
specific to the alternator transported alone. Upon
request Leroy-Somer can provide a locking system for
the transported alternator coupled to its “prime
mover”.
Rear bearing; Locking system examples:
1
2
3
3
1
2
3
3
1 - Cable
2 – Red label out of the alternator indicating a Locking
system
3 – Rotor locking system
2.12.1.1 Double roller bearing machine
A locking system is installed on the opposite side to the
shaft end in order to load the roller bearing sufficiently and
eliminate any possible movement of the rollers on their
tracks.
2.12.1.2 Single roller bearing machine
Machine transported alone:
On the front bearing, a threaded rod lifts the rotor and
brings it into contact with the stator. The rotor is locked
axially and radially.
Tr
ansported machine coupled to its prime mover
(single roller bearing machine only):
A locking system is installed on the opposite side to the
shaft end in order to load the roller bearing sufficiently and
eliminate any possible movement of the rollers on their
tracks.