2017.09 / f
Electric Power Generation
19
Installation and maintenance
TAL 046
Low Voltage Alternators - 4 pole
5377 en -
Rotor
NDE shield
Dowel
Nut
Threaded rod
4 78 36
- Fit the thrust bearing screws (78), remove
the threaded rod, fit the other screw and
tighten up the assembly.
- Block the 8 tie rods (37) of the bearing.
- Reconnect wires.
- Fit the air inlet louvre (51).
- Replace the cover.
When dismantling the shields, you will
need to change the antifriction bearings,
the “O” ring seal, the preloading (wavy)
washer and adhesive paste.
• Dismantling the rotor assembly
Follow the procedure for dismantling the
bearings.
- Remove the coupling disc (322).
- Rest the rotor on one of its poles.
- Support the DE rotor (4) with a strap or with
a support constructed in accordance with
the following drawing.
- After extraction of the rotor, be careful not
to damage the fan (15) or dismantle it.
- Remove the rotor on special V-shaped
supports.
When dismantling the rotor involves
changing parts or rewinding, the rotor
must be rebalanced.
• Reassembling the machine
- Follow the dismantling procedure in reverse
order.
Take care not to knock the windings when
refitting the rotor in the stator.
- Block the 6 screws (31) of the front bearing /
SAE washer before tightening the tie rods
(37).
- Refit the air grille (33) and (51).
4.7 - Installation and maintenance of
the PMG
The PMG reference is PMG 2.
See the PMG manual ref : 4211.
4.8 - Table of characteristics
Table of average values
Alternator - 4 poles - 50 Hz - Winding no. 6S
(6-wire) - no. 6 (12-wire)
(400V for the excitation values)
The voltage and current values are given for
no-load operation and operation at rated
load with separate field excitation.
All values are given to within ± 10% and may
be changed without prior notification (for
exact values, consult the test report).
WARNING
WARNING
WARNING
