4
LEROY-SOMER
2010.11 / f
Installation and maintenance
R438
A.V.R.
1 - SUPPLY
1.1 - AREP excitation system
For both AREP & PMG excitation systems,
the alternator voltage regulator is the R438.
With
AREP
excitation, the R438 electronic
AVR is powered by two auxiliary windings
which are independent of the voltage match
circuit.
The first winding has a voltage in proportion
to that of the alternator (characteristic
Shunt), the second has a voltage in propor-
tion to the stator current (compound charac-
teristic: Booster effect).
The power supply voltage is rectified and
filtered before being used by the AVR moni-
toring transistor. This principle ensures that
regulation is not affected by distortions ge-
nerated by the load.
4 x holes Ø 5.8 x
175 x 115 mm
200 mm
140 mm
X2
X1 Z2 E+ E- 0V 110 220 380
Z1
T1
T2
T3
T4
T5
T6
Va
ris
to
r
5+
6-
T7
T8
T9
T10
T11
T12
R 438
F1
ST5
P5
ST11
ST2
ST1
P3
P2
P1
ST4
ST9
Option
AREP
PMG
PMG
T.I.
Option
S1
P1
Ph.1
P2
S2
R731
Option
AREP SYSTEM
Field
Armature
10 Yellow
11 Red
9 Green
12 Black
MAIN FIELD
Aux. windings
Slow fuse
250V 8 A
with LAM without LAM
Excitation
ceiling
knee-point: 65 Hz
open
Response
time
normal
fast
Stability
Voltage
Single-
phase
detection
External potentiometer
for adjusting the voltage
Quad
droop
according voltage
STATOR : 6 wires (marked T1 to T6)
STATOR : 12 wires (marked T1 to T12)
in 3-ph. detection ST1 open
3-ph. detection
ST3
50Hz
60Hz
ST10
13 %
LAM
25 %
Frequency
3971 en -
230/242
Содержание R33C3
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Страница 95: ...10 Appendix 10 1 Appendix A Engine user and maintenance manual 93 242 ...
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Страница 191: ...July 2009 Pub No 99610 29120 OPERATION MAINTENANCE MANUAL 189 242 ...
Страница 192: ...Printed in Japan Pub No 99610 29120 190 242 ...
Страница 193: ...10 2 Appendix B Alternator user and maintenance manual 191 242 ...
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Страница 242: ...14 LEROY SOMER 2010 11 f Installation and maintenance R438 NOTES 3971 en 240 242 ...
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