Presentation Of The R 452; Application; Description - Leroy-Somer R452 Installation And Maintenance Manual

LEROY-SOMER

1 - PRESENTATION OF THE R 452

1.1 - application

The R 452 regulator is of a shunt type. It is designed to fit as
standard on alternators from the LSA 46.2 to the LSA 54, and
is used to replace R 448 or R 449 AVRs for any application
with high load impacts, leading to load reconnection
difficulties for the generator set. It can be supplied with power
either by a power VT, or by the AREP excitation system, or by
a single-phase or 3-phase PMG.
Using the R 726 external module, the regulator can control
the power factor (2F) and can match the alternator voltage to
the mains voltage (3F).

1.2 - description

The electronic components mounted in a plastic casing are
sealed with opaque elastomer. Connection is via 2
connectors (male ''Faston'' lugs 6.3).
The regulator includes:
- A main terminal block (10 terminals)
- A secondary terminal block (5 terminals)
- A frequency selection terminal block (3 terminals)
- A droop potentiometer
- A voltage potentiometer
- A stability potentiometer - Integral
- An underspeed potentiometer
- A maximum excitation potentiometer
- A LAM potentiometer
- A kU/F potentiometer
- A stability potentiometer - (proportional)
- A stability potentiometer - (derivative)
- A sensing selection jumper
(Single/3-phase with an external module)
- A response time jumper
- A frequency selection jumper
- An external voltage setting jumper
- A LAM (load adjustment module) jumper
Two fuses (F1 and F2) are connected to this regulator; they
are mounted in the alternator on terminal block C.
Type: gG 10/38 16A 500V.
Simplified diagram of a potentiometer:
To adjust the potentiometer, check the actual position of the
potentiometer stop.
Stop
4
INSTALLATION AND MAINTENANCE
VOLTAGE REGULATOR R452
P
RESENTATION OF THE
J1
J2
J3
P1
P2
P3
P4
P5
P6
P7
P8
P9
ST1
ST2
ST3
ST4
ST5
0
5
10
R 452
With LAM Without LAM
ST5
50Hz 60Hz
ST3
Frequency
P7
kU/F
J3
P5
Excitation
ceiling
P4
Under
speed
ST2
Response
time
normal
rapid
P3
Stability
P2
Voltage
P8
J2
Stability
(proportio.)
ST1
Single phase
detection
3-phase detection
Option
Option
R731 ST4
External potentiometer
ST4
for voltage adjustment
Option
or for R 726 connection
Ref. 3563 GB - 4.33 / a - 01.02
5+
Exciter field
Supply
200 x 140 mm
4 x Ø5.8 x 175 x 115
P6
LAM
J1
X2
Z1
X1
Z2
E+
E-
L3
0V
( W )
110
220
R452
380
P9
Stability
P1
(derivative)
Quad. droop
C.T.
L2 ( V )
S2
S1
340-520V
170-260V
85-140V
6 -