SDMO R570U - 2 Power Supply; AREP Excitation System

2012.03 / e
LEROY-SOMER
5
Installation and maintenance
R 450
AVRs
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 rst 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 rectied and
ltered 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
Varistor
5+
6-
T7
T8 T9
T10
T11
T12
according to voltage
Aux. windings
10 Yellow 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
R 450
VO IR NO T IC E SE E N OT I CE
VOLT. STAB. I EXC
STAT.
FUSIBLES / FUSES
1k
3PH.
S1 S2
50 Hz
60 Hz
EXT FREQ
SETTING
7
LAM
OFF
LAM
ON
ONLY 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
LSA
49.1 / 50.2
7000 / 8000
SERIES
LSA
49.1 / 50.2
7000
/ 8000
SERIES
LSA
46.2 / 47.2
5000 / 6000
SERIES
LSA
46.2 / 47.2
5000
/ 6000
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
LEDS
USC
Installation & maintenance manual :
www.leroy-somer.com
380V 220 110 0V E- E+ Z2 X1 Z1 X2
1 PHASE SENSING
3 PAHASES SENSING
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