Power Supply; Arep Excitation System - SDMO RENTAL POWER R550C2 User And Maintenance Manual

LEROY-SOMER

2 - POWER SUPPLY

Both the SHUNT/AREP & PMG excitation
systems are controlled by the AVR.

2.1 - AREP excitation system

With AREP excitation, the electronic AVR is
powered by two auxiliary windings which
are independent of the voltage sensing
circuit.
The first winding has a voltage proportional
to the alternator main voltage (Shunt
AREP SYSTEM
Armature
5+
6-
Field
Installation and maintenance
MAIN FIELD
R 450
380V 220 110 0V
according to voltage
265/298
R 450
AVRs
characteristic), the second one has a
voltage proportional to the stator current
(compound characteristic : Booster effect).
The power supply voltage is rectified and
filtered before being used by the AVR
monitoring transistor.
This system provides the machine with a
short-circuit current capacity of 3 IN for 10 s.
The rotating switch should be in the AREP
position (see 3.2.3).
Aux. windings
T4
50 Hz EXT FREQ
60 Hz SETTING
E- E+ Z2 X1 Z1 X2
C US
4531 en - 2012.03 / e
STATOR : 6 wires ( T1 to T6)
STATOR : 12 wires ( T1 to T12)
T7
T1 T2 T8
T5 T11
T10
10 Yellow
11 Red
12 Black
9 Green
T3 T9
T6 T12
5