Nidec LEROY-SOMER R221, Installation And Maintenance Manual

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5
2017.12 / e
Electric Power Generation
Installation and maintenance
R221
A.V.R.
5035 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 ST3 frequency selection
jumper is on the correct frequency setting.
- Check whether the ST4 jumper or the
remote adjustment potentiometer have
been connected.
3.2 - Settings
The machine is tested and set at the
factory. When first used with no load,
make sure that the drive speed is correct
and stable (see the nameplate). After
operational testing, replace all access
panels or covers.
The only possible adjustments to the
machine should be made on the AVR.
3.2.1 - R 221 setting (shunt system)
Initial potentiometer settings
-
P1 potentiometer (AVR voltage
adjustment): fully anti-clockwise.
- Remote voltage adjustment potentiometer:
centre position.
Run the alternator at its rated speed. If the
voltage does not increase, the magnetic
circuit should be remagnetized (see section
3.3).
- Turn the AVR voltage adjustment
potentiometer P1 slowly until the output
voltage rated value is obtained.
- Adjust the stability setting using
P2.
Clockwise: increase the rapidity.
Anti-clockwise: decrease the rapidity.
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 - R221 field weakening (SHUNT)
The exciter is switched off by disconnecting
the AVR power supply (1 wire - 0 or 110V).
Contact rating : 16A - 250V alt.
The power supply contactor must only be
closed when the alternator is not being
driven
3.2.2.2 - R221 field forcing
Battery must be isolated from the earth.
Exciter field may be at line potential.
WARNING
E+ E- 0V 110
VOLT POT 1K
Battery (B Volt)
+
-
t
(400V - 10A) Diode
E+ E- 0V 110
Exciter field