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Electric Power Generation
- Tighten the 5 shield screws (37).
- Reconnect exciter wires E+, E-.
- Finish reassembling the cover.
- Screw a threaded rod into the thrust
bearing.
- Refit the shield (30) on the machine.
- Slide the threaded rod into the shield hole
to make it easier to assemble (see basic
diagram).
- Fit the thrust bearing screws, remove the
threaded rod, fit the other screw and tighten
up the assembly.
- Tighten the 6 shield screws (31).
- Refit the air outlet grille (33).
- Check that the machine assembly is
correctly mounted and that all screws are
tightened.
4.7 - Table of characteristics
Table of average values
Alternator - 4 poles - 50 Hz - Standard
winding No. 6.
(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).
• SHUNT resistances at 20 °C (Ω)
Type Stator L/N Rotor
A
0.0079
0.479
B
0.00638
0.548
C
0.00638
0.548
D
0.00458
0.609
E
0.00479
0.635
F
0.00395
0.678
16
Installation and maintenance
TAL 047
Low Voltage Alternators - 4 pole
Exciter
Exciter
armature
field
12.1
0.0774
12.1
0.0774
12.1
0.0774
12.1
0.0774
12.1
0.0774
12.1
0.0774
•
SHUNT field excitation current i exc (A)
Symbols : "i exc": excitation current of the
exciter field
Type
No load
A
1.1
B
1
C
1
D
1.1
E
0.9
F
0.9
For 60 Hz machines, the "i exc" values are
approximately 5 to 10 % lower.
• Table of weights
(values given for information only)
Type
Total weight (kg)
A
1113
B
1113
C
1113
D
1240
E
1289
F
1372
After operational testing, it is essential
to replace all access panels or covers.
5378 en -
2016.05 / c
At rated load
4.8
4.3
4.7
4.4
4.6
4.6
Rotor (kg)
387
442
442
495
514
547
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