Installation Guide

2022.05 / h
Electric Power Generation
8
Installation and maintenance
R250
AVR
4067 en -
3 - INSTALLATION -
COMMISSIONING
3.1 - Electrical checks on the AVR
- Check that all connections have been
made properly as shown in the attached
wiring diagram.
- Check that the position of the jumper
corresponds to the operating frequency.
- Check whether the ST4 jumper or the
remote adjustment potentiometer have
been connected.
3.2 - Settings
The di󰀨erent settings made during the
trial are to be done by qualied personnel.
Respecting the load speed specied on
the nameplate is vital in order to start a
settings procedure. After operational
testing, replace all access panels or
covers.
The only possible settings on the
machine are to be done with the AVR.
3.2.1 - R250 settings (SHUNT system)
Initial potentiometer positions
- voltage setting potentiometer P1 for the
AVR: full left
- remote voltage setting potentiometer: in
the middle.
Operate the alternator at its rated speed: if
the voltage does not rise it is necessary to
re-magnatise the magnetic circuit.
- slowly adjust the voltage potentiometer of
the AVR P1 until the output voltage reaches
its rated value.
- Stability setting with P2.
3.2.2 - Special type of use
Excitation circuit E+, E- must not be left
open when the machine is running: AVR
damage will occur.
3.2.2.1 - R250 eld weakening (SHUNT)
The exciter is switched o󰀨 by disconnecting
the AVR power supply (1 wire - 0 or 110V).
Contact rating: 16A - 250V AC.
Do not reclose the power supply until the
voltage has reached a value ≤15% of the
rated voltage (approximately 5 seconds
after opening).
3.2.2.2 - R250 eld forcing
Battery must be isolated from the earth.
Exciter eld may be at line potential.
WARNING
WARNING
E+
E-
0V 110
Battery (B Volt)
+
-
t
(400V - 10A)
Excitation Inducer
Diode
E+
E-
0V 110