Avr Options - SDMO R 340 U User And Maintenance Manual

LEROY-SOMER
3.4.3 - Power
Load shedding due to LAM
1 s
0

3.5 - AVR options

- Current transformer for parallel opera-
tion of....../1 A or 5 A according to the po-
tentiometer P4 position.
- Voltage transformer (adaptation)
- Remote voltage adjustment potentio-
meter.
For a range of variation:
± 5% : 470 Ω
± 10% : 1 kΩ
the power of the potentiometer can be
0.5 W, 2 W or 3 W.
The potentiometer
isolated. Do not connect it to the ground.
- R 731 module: 3-phase voltage sensing
200 to 500 V, compatible with parallel
operation in balanced installations.
- R 734 module: 3-phase current and
voltage sensing for parallel operation on
unbalanced installations (unbalance >
15%).
- R 726 module: regulation system
changed to "4 - function" (see the
maintenance manual
diagram).
• PF regulation (2F) .
Installation and maintenance
R 450
AVRs
LAM
Variation in the load
Time
2 s 3 s
input must be
and connection
261/285
• Equalization
paralleling (3 F).
• Possibility of coupling to the mains of
alternators already running in parallel (4F).
- R729 module: same as R726 with
additional functions.
• Detection of a diode fault.
• 4-20 mA input.
• Possibility of kVAR regulation.
- Voltage control:
D.C. current source applied to the terminals
used for the external potentiometer:
• Internal impedance 1.5 kΩ.
• A variation of ± 0.5 V corresponds to a
voltage adjustment of ± 10%.
4531 en - 2012.03 / e
of voltages before
with an isolated
13