Installation and maintenance
R250
A.V.R.
4
LEROY-SOMER
4067 en - 2009.05 / b
1 - SUPPLY
1.1 - SHUNT excitation system
The SHUNT excitation alternator is auto-
excited with a R 250 voltage regulator.
The regulator controls the excitation current
according to the alternator’s output voltage.
With a very simple conception, the SHUNT
excitation alternator does not have a short
circuit capacity.
4 x holes Ø 5.8 x
50 x 115 mm
140 mm
75 mm
SHUNT SYSTEM
Field
Induced
T1
T2 T3
T4
T5
T6
Varistor
5+
6-
T7
T8 T9
T10
T11
T12
STATOR : 12 wires (marking T1 to T12)
MAIN FIELD
R 250
VOLT
FREQ. & L.A.M. CONFIG.
STAB
F1
Slow fuse
250V 8 A
P1
Voltage
P2
Stability
110
E+
E-
0V
0
9
8
7
6
5
4
3
2
1
o
1
2
3
5
6
7
9
8
4
60Hz
65Hz
57Hz
47.5Hz
50Hz
KNEE
SPECIAL
LAM
OFF
OFF
13%
13%
25%
25%
LAM
KNEE
KNEE
LAM OFF
LAM OFF
LAM OFF
External potentiometrer
for voltage adjusting
ST4
Option
Frequency selector 50 Hz
/ 60 Hz for U/F fonction
and LAM adjustement