5
2016.06 / h
Electric Power Generation
Installation and maintenance
R450
A.V.R.
4531 en -
2 - POWER SUPPLY
Both the SHUNT/AREP & PMG excitation
systems are controlled by the AVR.
2.1 - AREP excitation system
With
AREP
excitation, the electronic AVR is
powered by two auxiliary windings which
are independent of the voltage sensing
circuit.
The first winding has a voltage proportional
to the alternator main voltage (Shunt
characteristic), the second one has a
voltage proportional to the stator current
(compound characteristic : Booster effect).
The power supply voltage is rectified and
filtered before being used by the AVR
monitoring transistor.
This system provides the machine with a
short-circuit current capacity of 3 IN for 10 s.
The rotating switch should be in the AREP
position (see 3.2.3).
AREP SYSTEM
Field
Armature
T1
T2
T3
T4
T5
T6
Va
ris
to
r
5+
6-
T7
T8
T9
T10
T11
T12
according to voltage
Aux. windings
10
Y
ellow
11 Red
9 Green
12 Black
10 Yellow
11 Red
9 Green
12 Black
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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1-888-POWER-58
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