ComAp IG-NT, Installation Manual

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IGS-NT Installation Guide
117
AVRi outputs can be connected as symmetric: OUT1-OUT2 or asymmetric OUT1-OCOM or
OUT2-OCOM.
•
Potentiometer on the AVRi defines maximum OUT1, OUT2 voltage range.
•
Use symmetric (OUT1,OUT2) AVRi output to connect the AVRi to AVR auxiliary
voltage input.
•
Use asymmetric output if an external AVR potentiometer has to be replaced with
AVRi.
•
AVRi output voltage should change generator voltage typically in range

10 % of
Nominal voltage.
•
For more details please refer to Installation guide
– chapter AVR interface examples.
100.0 %
10 V
0 V
AVR DCout bias 0 %
AVRi p
ot set to
minimu
m
2 V
AV
Ri
po
t se
t to
ma
xim
um
OUT1
– OCOM [V]
100.0 %
10 V
0 V
AVR DCout bias 0 %
AVRi pot set
to minimum
2 V
AVR
i po
t se
t to
max
imu
m
OUT2
– OCOM [V]
AVRi Out1 or Out 2 to GND output voltage depends on AVRi trim setting
[V]
100.0 %
AV
R
i p
ot
=
m
ax
im
um
AVR DCout bias
10 V
Out1 to Out2
0 V
0 %
-10 V
AVR
i po
t =
min
imu
m
50 %
AVRi output voltage
Out1 -
OCOM
Out2 -
OCOM
Out1
–
Out2
Bias \
Pot
Min Max Min Max Min Max
0 % 0 0 2 10 - 2 V -10
V
50 % 1 5 1 5 0 V 0 V
100 % 2 10 0 0 + 2
V
10 V
AVRi Out1 to Out 2 output voltage
17.2.2. Voltage control adjustment
1) Set Voltage gain , Voltage int to zero and AVR DCout bias to 50%.
2) Start always with AVRi pot min adjustment (fully counterclockwise).
3) Start the gen-set in MAN Mode to nominal speed, without load.
4) Adjust generator voltage to nominal value by the potentiometer present on the AVR. If
there is no potentiometer on the AVR, use setpoint AVR DCout bias to adjust the
nominal voltage .
5) Change AVR DCout bias to 0% and 100% to check generator voltage control range
(typically

10 % of nominal voltage). Adjust voltage control range by AVRi trim.
6) Set AVR DCout bias to be Nominal voltage on generator (50%).