LEROY-SOMER
Installation and maintenance
4291 en-10.2008/a
R220
A.V.R.
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
remóte adjustment potentiometer have
been connected.
3.2 - Settings
A
The machine is tested and set at the
factory. When firs t 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 220 setting (shunt system)
Initial potentiometer settings
-Plpotentiometer(AVRvoltageadjustment):
fully anti-clockwise.
- Remóte 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 valué is obtained.
- Adjust the stability setting using P2.
Clockwise: increase the rapidity.
Anti-clockwise: decrease the rapidity.
3.2.2 - Special type of use
( W A R N IN G )
Excitation circuit E+, E- must not be left
open when the machine is running : AVR
damage w ill occur.
3.2.1.1 - R220 field weakening (SHUNT)
—
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o
r
VOLT P0T1K
110 0 v E + E -
* i i [ i
E 3 H in n
The exciter is switched off by disconnecting
the AVR power supply (1 wire - 0 or 110V).
Contact rating : 16A - 250V alt.
3.2.1.2 - R220 field forcing
(400V-10A)
Diode
&
Battery must be isolated from the earth.
&
Exciter field may be at line potential.
