___________________________________________________________________________________________
EA06
3
SECTION 3 : WIRING / ADJUSTMENTS
3.1
Field Excitation Wiring
「
+,
–
」
3.1.1 Connect AVR terminal
「
+
」
to field
「
+
」
, connect
AVR terminal
「
–
」
to the field
「
–
」
.
NOTE
The Exciter field resistance is between 10
100
ohm.
3.1.2 If field resistance is less than 10 ohm when
generator is under full load and the field voltage
is under the maximum output, please series a
suitable wattage (W) resistor to have the overall
field resistance to equal to 10
100 ohm.
3.2
Sensing / Power Input
「
1-2, 3-4, 5-6
」
3.2.1 Total of 3 sets of independent sensing inputs,
each input voltage equals to 120 / 240V (Center),
can be series into Y or
to connect to the
generator output (3 Phases) for example R-T, T-S,
S-R, or joint connected into a single phase
sensing (See Figure 2 to 13).
3.2.2 Terminal +, 2 is the AVR power input, voltage
range from 50
280V.
3.3
Frequency Selection (60 Hz)
When the 2 terminals marked as 60 Hz on the AVR is
bridged, the system frequency is 60 Hz. In the contrary,
when bridge is removed the system frequency is 50
Hz.
3.4
External Voltage Adjustment VR
Connect a 100K Ohms 1/2W voltage rheostat at VR
terminals to enable a +/- 5% voltage adjustment from
rated voltage.
*
The terminals must be bridged when the external
voltage adjustment function is none required.
3.5
Terminals B, 0 can remain not connected
3.6
VOLT. Voltage Adjustment
User can adjust the generator voltage by rotating the
「
VOLT
」
potentiometer on the AVR. Rotate the
potentiometer clockwise to increase voltage and
decreasing when rotate counterclockwise. The voltage
adjust rate is less than 1% when the power factor
equals to 1 to 0.8 (PF 1 to 0.8) and frequency variation
within 6%.
3.7
STAB. Stability Adjustment
3.7.1 Slowly and precise adjustment of
「
STAB
」
potentiometer can change the respond time
between the AVR and generator. Inadequate
adjustment will cause voltage instability and over
adjusting will cause sudden overly voltage
variation under heavy load.
3.7.2 Analogue type multi voltmeter is suggested when
adjusting the voltage stability. Adjust the
「
STAB
」
potentiometer until the pointer on the
multi voltmeter is oscillating to its minimal.
3.8
Circuit Protection
3.8.1 AMP. Over Excitation Protection Adjustment
(Overload protection)
Set the
「
AMP
」
Overload protection value (25 to
55 Vdc) according to the generator maximum
excitation voltage. When over excitation occurs
wait for 20 seconds then decrease the generator
voltage to 30 to 50 Vac. When the Over
excitation protection is activated the yellow LED
will illuminate, the higher the over excitation
value is the shorter delay time becomes. The
generator will require stopping operation to reset.
3.8.2 Hz. Under Frequency Protection Adjustment
Hz.
Is used to set the under frequency
protection knee point. When the generator
frequency declines to setting point, the generator
voltage will also decrease in the same time to
prevent high excitation current from damaging
the AVR or the exciter, adjustment procedure :
Adjustment procedure :
(1) Start generator and let voltage build up.
(2) Adjust engine frequency to the appropriate
low frequency value.
(3) Slowly adjust Hz. Potentiometer until the red
LED illuminates.
SECTION 4 : OPERATION PROCEDURE
4.1
Please confirm the follow condition before
starting the generator :
4.1.1 Starting Setting
(1) Confirm if the AVR specification conforms to
the system requirements ?
(2) Confirm the AVR wiring ?
(3) Confirm correct frequency selected ?
(4) Confirm the generator rated voltage with the
AVR sensing input ?
(5) Adjust
「
VOLT
」
potentiometer
fully
counterclockwise?
Adjust
「
STAB
」
potentiometer to the center
position?
Adjust
「
AMP
」
potentiometer fully clockwise?
