___________________________________________________________________________________________
4
EA06
Figure 2
Manual Field Flash
4.1.2 Starting Generator
(1) Reconfirm all setting and wiring.
ATTENTION
The AVR reading AC voltage are all average
value.
(2) Start generator and adjust to rated frequency.
The first measured voltage value should be
under the rated voltage. If not, then reconfirm
the start setting.
(3) Slowly adjust
「
VOLT
」
potentiometer to the
rated voltage, at this time the generator
voltage may become unstable. Adjust the
「
STAB.
」
potentiometer anticlockwise, until
the oscillation stabilizes. Over adjustment
may cause short oscillation when load applied
or load type varies.
SUGGESTION
Adjust the
「
STAB.
」
potentiometer to the point
where the oscillation occurs and then adjust the
potentiometer
counterclockwise
by
1/6
of
rotation.
(4) If voltage can not be adjusted or to the rated
value, please check to see if the generator
frequency is too slow (Under frequency
protection activated). If residual voltage is
below 5 Vac, then please execute field
flashing to help build up the residual voltage.
(5) Make sure the generator and AVR are both
under normal operation conditions.
(6) The voltage adjustable range should be +/-
1% under no load or full load. If the adjustable
range in not within such range, please check
the below :
A. Generator under frequency (Lower than low
frequency protection knee point).
B. Severely deformed generator output wave
form.
C. Capacitive load over ratio (Power factor in
lead).
D. Change the AVR and restart.
E. Under over excitation voltage protection
(Overload protection).
SECTION 5 : FIELD FLASHING
When the regulator is installed correctly but the
generator is failed to generate power. Besides carbon
brushes were worn out, here are two possible causes
below.
5.1
The polarity of field is inverse
Solution
：
Exchange the connection of F+ and F-.
5.2
The residual voltage is less than 5 Vac,
Solution 1
：
5.2.1 Shut down generator, disconnect the wiring
between AVR and generator then flash the field.
Flashing duration = 3 seconds. (See wiring in
Figure 2)
Resistor 3
– 5 ohms for full wave AVR
Resistor 5
– 10 ohms for half wave AVR
Warning
!!
Over field flashing may damage
the field winding of generator.
5.2.2 Restart generator and measure the residual
voltage by AC Voltmeter, if it is still less than 5
Vac, repeat the previous process, after several
times, the residual voltage still cannot be built,
Kutai EB500 is strongly recommended, see
Figure 2.
Field
SW
R
-
+
V
F+
F-
BATT.
~
G
~
T
S
R
5.3
Maintenance
Regular maintenance to make sure the AVR surface is
clean and free from oil or moisture. All connection
terminals and wirings must be firmly tightened and no
signs of visible oxidation or erosion.
WARNING
Overly field flashing may damage the AVR or
generator excitation winding.
Please make sure you have read and understand
the contents of the instruction manual prior to
installation. Incorrect wiring connection may
result in irreversible damage to the product and
other equipments.
