Leroy-Somer AVR R448 User Manual

Installation and maintenance
R448 & R448 V50
A.V.R.
3972 en - 02.2008 / d
LEROY-SOMER
7
2.3 - SHUNT or separate excitation
system
In SHUNT excitation, R 448 A.V.R. is
supplied by main windings (140V - 50/60
Hz) to X1, X2.
The new functions are :
- Parallel operation between alternators
with C.T.
- Parallel operation with the mains with C.T.
and R 726 module
- 3-phase sensing (R 731 module)
- LAM function integrated in the R 448 AVR.
In this case of LSA 42.2, A.V.R. and
module(s) must be installed in the
external control panel.
X2
X1
Z2
E+
E-
0V
110
220
380
Z1
T1
T2 T3
T4
T5
T6
Varistor
5+
6-
T7
T8
T9
T10
T11
T12
R 448
F1
ST5
P5
ST11
ST2
P3
STATOR : 12 wires (marked T1 to T12)
SHUNT SYSTEM
Field
Armature
MAIN FIELD
Slow fuse
250V 10 A
with LAM
without LAM
Excitation
ceiling
knee-point: 65 Hz
open
Response
time
normal
fast
Stability
according voltage
ST6
ST1
46.2/47.2
49.1
P2
No ST6 jumper
for R448 V50
4 x holes Ø 5.8
(175 x 115 mm)
200 mm
140 mm
R731
Option
ST4
Option
T.I.
Option
S1
P1
Ph.1
P2
S2
Voltage
Single-
phase
detection
External potentiometer
for adjusting the voltage
in 3-ph. detection ST1 open
3-ph. detection
ST9
AREP/SHUNT
PMG
ST3
50Hz
60Hz
ST10
13 %
LAM
25 %
P1
Frequency
Quad
droop

Leroy-Somer AVR R448 Specifications

General

Brand	Leroy-Somer
Model	AVR R448
Category	Controller
Language	English