Leroy-Somer AVR R448 User Manual

Installation and maintenance
R448 & R448 V50
A.V.R.
10
3972 en - 02.2008 / d
LEROY-SOMER
3.4 - Typical effects of the LAM with
a diesel engine with or without a
LAM (U/F only)
3.4.1 - Voltage
3.4.2 - Frequency
3.4.3 - Power
3.5 - R448 A.V.R. options
- Current transformer for parallel operation
of....../ 1A Š 2.5 VA CL 1 (See the diagram
in this manual).
- Voltage transformer (adaptation)
- Remote voltage adjustment potentiometer:
470 :, 0.5 W min : adjustment range ± 5%
(range limited by internal voltage
potentiometer P2). Remove ST4 to connect
the potentiometer. (A 1 k : potentiometer
can also be used to extend the adjustment
range).
- R 731 module: detection of 200 to 500V 3-
phase voltage, compatible with parallel
operation. Disconnect ST1 to connect the
module; set the voltage via the
potentiometer.
- R 734 module: detection of 3-phase
current and voltage for parallel operation on
unbalanced installations (imbalance > 15%)
- R 726 module: regulation system changed
to "4-function". (See the maintenance
manual and connection diagram.)
• PF regulation M (2F)
• voltage matching before paralleling (3 F)
• mains connection of alternators already
running in parallel (4F)
- R 729 module: same as R 726 with
additional functions
• detection of a diode fault
• 4/20 mA input
• possibility of kVAR regulation
- Control through DC voltage used
monitoring apply to the terminals for
connection of a potentiometer DC voltage :
• internal impedance 1,5 k:
• ± 0,5V enable a voltage setting of 10%.
U
N
0
0,9
0,8
(U/f)
with
LAM
Tim
e
without LAM
1 s 2 s 3 s
Transient voltage drop
0
,9
0
,8
f
N
Max speed drop
0
with
LAM
Tim
e
without
LAM
1 s 2 s 3 s
0
1 s 2 s 3 s
Tim
e
LAM
Variation in the loa
d
Load on the
shaft (kW)
Load shedding due to "LAM"

Leroy-Somer AVR R448 Specifications

General

Brand	Leroy-Somer
Model	AVR R448
Category	Controller
Language	English