Installation and maintenance
R448 & R448 V50
A.V.R.
8
3972 en - 02.2008 / d
LEROY-SOMER
3 - R448 A.V.R.
3.1 - Characteristics
- Shunt power supply: max 150V - 50/60 Hz
- Rated overload current: 10A - 10s
- Electronic protection: (in the event of
overload, short-circuit, loss of voltage sensing)
this acts to restore the value of the excitation
current to 1A after 10 s. The alternator must be
stopped (or the power switched off) in order to
reset the protection.
- Fuse: F1 on X1, X2. 10A ; slow - 250V
- Voltage sensing : 5 VA isolated via trans-
former
• 0-110 V terminals = 95 to 140 V
• 0-220 V terminals = 170 to 260 V
• 0-380 V terminals = 340 to 520 V
for other voltages, a transformer should be
used.
- Voltage regulation ± 0.5%
- Normal or rapid response time via jumper
ST2
(see below)
- Voltage adjustment via potentiometer
P2
or
apply a DC voltage of ± 1 V on the terminals of
the external potentiometer
- Current sensing: (parallel operation): input
S1, S2 intended for 1 C.T. Š 2.5 VA cl1,
secondary 1A (optional)
- Quadrature droop adjustment via potentio-
meter
P1
- Max. excitation current adjustment via
P5
:
4.5 to 10A (see below)
- 50/60 Hz selection via
ST3
jumper
-
ST11
: Knee-point at 65 Hz for Tractelec
application and variable speed.
3.1.1 -
Configuration jumpers function
3.1.2 - Setting potentiometers function
Pot.
Delivrery
config.
Position Function
Open Closed
ST1 3-ph.
Mono
Open for module
installation tri detection
ST2 Fast Normal Response time
ST3 50 ou 60 Hz Frequency selection
ST4
External
potentio-
meter
Without Potentiometer
ST5 Without With LAM
closed
Alternator LSA 46.2 and
LSA 472
ST6 With open Alternator LSA 49.1
no jumper Alternator LSA 50.2
ST9
Others
(PMG...)
AREP
SHUNT
Supply
ST10 13% or 25%
LAM voltage drop
amplitude
ST11 65 Hz
48 or
58 Hz
U/f function bend
position
Delivrery
position
Pot. Function
0 P1 Quadrature droop ; // operation with C.T.
400V P2 Voltage
Centre P3 Stability
Maxi P5 Excitation current ceiling
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