LEROY-SOMER
5
2010.11 / f
Installation and maintenance
R438
A.V.R.
1.2 - PMG excitation system
This excitation system consists of a «
PMG
»
(permanent magnet generator). This is fitted
at the rear of the machine and connected to
the R438 AVR.
The PMG supplies the AVR with constant
voltage which is independent of the main
alternator winding. As a result the machine
has a short-circuit current capacity and
good immunity to distortions generated by
the load.
The AVR monitors and corrects the alterna-
tor output voltage by adjusting the excitation
current.
- 50/60 Hz selection via the
ST3
jumper.
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
V
a r
i s
t o
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
14 15 16
PMG
T.I.
Option
S1
P1
Ph.1
P2
S2
R731
Option
PMG SYSTEM
Field
Armature
MAIN FIELD
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
1.3 - SHUNT or separate excitation system
A.V.R. can be operated with SHUNT supply (with a transformer / secondary 50V or a 48V battery).
3971 en -
231/242
Summary of Contents for R33C3
Page 2: ......
Page 94: ...92 242 ...
Page 95: ...10 Appendix 10 1 Appendix A Engine user and maintenance manual 93 242 ...
Page 96: ...94 242 ...
Page 98: ...96 242 ...
Page 115: ...113 242 ...
Page 135: ...133 242 ...
Page 145: ...143 242 ...
Page 179: ...177 242 ...
Page 191: ...July 2009 Pub No 99610 29120 OPERATION MAINTENANCE MANUAL 189 242 ...
Page 192: ...Printed in Japan Pub No 99610 29120 190 242 ...
Page 193: ...10 2 Appendix B Alternator user and maintenance manual 191 242 ...
Page 194: ...192 242 ...
Page 196: ...194 242 ...
Page 227: ...Installation and maintenance R250 A V R 4067 en 2009 05 b LEROY SOMER 11 225 242 ...
Page 242: ...14 LEROY SOMER 2010 11 f Installation and maintenance R438 NOTES 3971 en 240 242 ...
Page 243: ...LEROY SOMER 15 2010 11 f Installation and maintenance R438 NOTES 3971 en 241 242 ...