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4
ADVR-16-400HZ
Figure 2
Manual Field Flash
NOTE
If the external VR is not used, short terminal VR1
and VR2.
4.5
U/F
：
Under Frequency protection setting.
At 400 Hz U/F factory set at 360Hz
To adjust the U/F setting, select the correct
system frequency, start engine and adjust engine
speed to the required U/F frequency (for example
360 Hz), slow adjust U/F potentiometer until the
U/F red LED turn ON, returning the engine speed
to normal turn the LED off. Adjustment range for
400Hz system is 420 to 320 Hz
Function of the Under Frequency trim pot
：
4.5.1 During start up or shutdown, the engine speed
changes going over or under its rated RPM (Hz).
This AVR has an Under Frequency circuit to
protect the AVR and exciter; you do not need to
disconnect the AVR when idling the engine.
4.5.2 If load is hi
gher than the generator’s capacity, the
Under
Frequency
activates,
reducing
the
generator’s voltage preventing generator overload.
4.6
Over Excitation Protection
：
4.6.1 This AVR has over Excitation Protection
preventing the generator from working under
unusually high excitation. Excitation Protection
includes generator overload, accident removal of
sensing wires, and incorrect voltage setting.
When problems occur, O/E protection will activate
and shutdown AVR’s excitation output (Delay up
to 5 seconds) which makes the generator
gradually drop to its minimum voltage (residual
voltage). Meanwhile the O/E LED stays ON and
keeps functioning, you’ll need to stop the
generator for about 10 seconds and restart the
AVR to be able to work properly. When working
the generator in parallel this protection is not
required, the user can disable this function by
switching DIP switch SW4 to ON position, vice
versa.
SECTION 5 : NOTICE OF USE
5.1
Installation Notice
：
(Refer to Figure 2 and 4).
5.1.1 Only, a trained professional can Installation,
calibrate and inspections this AVR.
5.1.2 Install this AVR inside the generator enclosure
away from moisture, corrosion and from any easy
to reach area.
5.2
Generator Operation Notice
：
5.2.1 During operation, the temperature on the surface
of the AVR can reach higher the 60
˚C / 140 ˚F.
5.2.2
“DANGER” When the AVR is working never touch
or ground the heat sink on the AVR. The AVR
heat sink is an electrically live terminal.
A warning sticker is in place on top of the heat
sink.
SECTION 6 : 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.
6.1
The polarity of field is reversed
Solution
：
Exchange the connection of F+ and F-.
6.2
The residual voltage is less than 5 Vac,
Solution 1
：
6.2.1 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.
6.2.2 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
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.
