6
2016.06 / h
Electric Power Generation
Installation and maintenance
R450
A.V.R.
4531 en -
2.2 - PMG excitation system
With
PMG
excitation, a permanent magnet
generator (PMG) added to the alternator
supplies the AVR with voltage which is
independent of the main alternator winding.
This system provides the machine with a
short-circuit current capacity of 3 IN for 10 s.
The AVR monitors the alternator output
voltage by adjusting the excitation current.
The rotating switch should be in the PMG
position (see 3.2.3).
PMG SYSTEM
PMG
T1
T2
T3
T4
T5
T6
Va
ris
to
r
5+
6-
14
14
15
15
16
16
T7
T8
T9
T10
T11
T12
according to voltage
Field
Armature
STATOR : 6 wires ( T1 to T6)
STATOR : 12 wires ( T1 to T12)
MAIN FIELD
R450
VOIR NOTICE
SEE NOTICE
VOL
T. ST
AB. I EXC
STAT
.
FUSIBLES /
FUSES
1k
3PH.
S1 S2
50 Hz
60 Hz
EXT FREQ
SETTING
LEDS
US
C
Install
ation & mai
ntenance manual :
www
.leroy-somer
.com
380V 220 110 0V E- E+ Z2 X1 Z1 X2
7
LAM
OFF
LAM
ON
ONL
Y FOR
SPECIAL
CONFIG.
KNEE
LAM OFF
65Hz
LAM
OFF
LAM
MODE 2
LAM
MODE 1
LAM
OFF
LAM
MODE 2
LAM
MODE 1
50Hz
EXT
.FREQ.
SET
.
60Hz
0
5
6
9
8
1
2
3
4
SERIES
7000
/8000
SERIES
7000
/8000
SERIES
5000
/6000
SERIES
5000
/6000
1 PHASE SENSING
3 PAHASES SENSING
2
3
0
1
RAPIDE
FAST
RAPIDE
FAST
NORMAL
NORMAL
NORMAL
NORMAL
SHUNT / AREP
PMG
2
3
0
1
0
9
8
7
6
5
4 3 2 1
0
3
2
1
0
3
2
1
LSA
49 / 50
LSA
46 / 47
LSA
46 / 47
LSA
49 / 50
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