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KUTAI ELECTRONICS INDUSTRY CO., LTD.
TEL : +886-7-8121771 FAX : +886-7-8121775 Website : www.kutai.com.tw
Headquarters : No.3, Ln. 201, Qianfu St., Qianzhen Dist., Kaohsiung City 80664, Taiwan
Self Excited 7 Amp Analog / Digital Voltage Regulator
For shunt and auxiliary windings generators
With over-excitation and lost of sensing protection
ADVR-073
Universal Hybrid Analog-Digital
Voltage Regulator Operation Manual
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Sensing Input
Static Power Dissipation
Voltage 170 520 Vac, 1 phase 2 wires
Max.8 watts
Frequency 50/60 Hz, DIP Switch setting
Under Frequency Protection (Factory Presets)
Power Input
50 Hz system presets knee point at 45 Hz
Voltage 100 300 Vac, 1 phase 2 wires
60 Hz system presets knee point at 55 Hz
Excitation Output
Over Excitation Protection
Voltage Max. 63 Vdc @ power input 220 Vac
Set point 78 Vdc +/- 5% @ power input 220 Vac
Current Continuous 7A
Time delay 5 secs. This function can be turned off.
Intermittent 15A for 10 secs.
Resistance Min. 9 ohms, Max. 100 ohms
Voltage Thermal Drift
Fuse Spec. Slow blow 5 x 20mm UDA-8A / 250V
Less than 3% at temperature range -40 to +70 ˚C
External Voltage Adjustment
Environment
Max. +/- 7% @ 1K ohm 1 watt potentiometer
Operating Temperature -40 to +60 ˚C
Storage Temperature -40 to +85 ˚C
Voltage Regulation
Relative Humidity Max. 95%
Less than +/- 0.5% ( with 4% engine governing )
Vibration 3 Gs @ 100 2K Hz
Build Up Voltage
Dimensions
5 Vac residual volts at power input terminal
150.0 (L) x 115.0 (W) x 51.5 (H) mm
Soft Start Ramp Time
Weight
3 secs. +/- 10%
430 g +/- 2%
EMI Suppression
Internal electromagnetic interference filtering
SECTION 1 : SUMMARY
The ADVR-073 is an advance (Hybrid Analog/Digital
Voltage Regulator) design for general-purpose
isochronous stand alone applications. The ADVR-073
uses an extremely reliable CPU (Central Processing
Unit) in its design. This eliminates complex analogue
components and circuits that are inherently over
sensitive to temperature anomalies, as a result
eliminating voltage instability and drift.
SECTION 2 : SPECIFICATION
In addition, we added over excitation and loss of
sensing shutdown protections, with matching U/F, O/E
LED indicator lights. Consequently, this AVR prevents
the generator from excitation overload, with its
resulting exciter and regulator damage. It is easy to
install and flexible for use in both shunt type and
generators with auxiliary windings.
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SECTION 3 : WIRING
3.1 A to C : Sensing Input
3.1.1 DIP SW-2 is switch ON, voltage sensing range
from 170 260 Vac (See Figure 3 & 4)
3.1.2 DIP SW-2 is switch OFF, voltage sensing range
from 340 520 Vac (See Figure 5)
3.2 B to C : Power Input
Power Input terminals from B to either C use 100
to 300 Vac shunt or auxiliary windings.
3.3 Power Input Voltage Selection
If generator rated voltage is 220 Vac (Line to line
phase voltage), the power input B, C and sensing
input A, C can be joined (See Figure 4) or
separately (See Figure 3).
3.4 F+, F : Connect generator field wires
3.4.1 F+ and F- are the positive and negative excitation
output terminals.
3.4.2 EXT.VR is the connections for the external
voltage adjustment. Use a (1K ohm 1W) rheostat
when not in use, keep terminals shorted.
※ Always use high quality connection wire AWG16
or 1.25mm2 85-degrees C, 600V to connection
terminals A, B, C, F+ and F-.
SECTION 4 : DIP SWITCH SETTING
4.1 SW-1 Frequency
4.1.1 DIP SW-1 switch ON, for use in 50 Hz
4.1.2 DIP SW-1 switch OFF, for use in 60 Hz
4.2 SW-2 Sensing Voltage Selection
4.2.1 DIP SW-2 switch ON, input voltage 170 260
Vac.
4.2.2 DIP SW-2 switch OFF, input voltage 340 520
Vac.
4.3 SW-3 Activate Over-Excitation Protection
4.3.1 DIP SW-3 switch ON, Over Excitation Protection
Disabled. If over excitation occurs, the O/E LED
turns-on, but the ADVR will not shutdown and
protect.
4.3.2 DIP SW-3 switch OFF. Over Excitation Protection
activated. If over excitation occurs, the O/E LED
turns-on and the ADVR will shutdown excitation.
SECTION 5 : SYSTEM PROTECTION
5.1.3 When engine frequency falls under the
Knee-Point frequency setting, the U/F protection
indication LED turn on. However, when the
Generator frequency is higher than the
Knee-Point frequency the LED turns off.
5.2 Over Excitation Protection
5.2.1 If you are using a standard AVR and you
overload the generator or the sensing wires get
disconnected (on a auxiliary powered AVR) , the
excitation voltage rapidly increase, causing
severe damage to the AVR or exciter. The
ADVR-073 has over excitation protection
shutdown that cuts excitation at once.
5.2.2 When over excitation protection is activated and
the excitation voltage exceeds 78 +/- 5 Vdc @
220V for over 5 seconds, the AVR immediately
shutdown the excitation output, leaving only the
residual voltage output and turning on the O/E
shutdown LED. To reset, the engine must come
to a complete stop for at least 10 seconds and
then restarted.
5.2.3 If over excitation protection is disabled, the
warning LED indication turn on, but the excitation
output is not disconnected.
SECTION 6 : ADJUSTMENT
6.1 VOLT : Voltage Adjustment
6.1.1 DIP SW-2 switch ON, input voltage 170 260
Vac.
6.1.2 DIP SW-2 switch OFF, input voltage 340 520
Vac.
6.2 STAB : Stability Adjustment
6.2.1 careful adjust the STAB (Stability) adjustment,
improves the AVR and generator feedback time
to improve voltage stability.
6.3 U/F : Setting the under-frequency knee point
6.3.1 DIP SW-1 set to ON, set for 50 Hz operation.
6.3.2 U/F adjustment range at 50 Hz is from 40 50 Hz
(Factory preset @ 45 Hz).
6.3.3 DIP SW-1 set to OFF, set for 60 Hz operation.
6.3.4 U/F adjustment range at 60 Hz is from 50 60 Hz
(Factory preset @ 55 Hz).
5.1 Under Frequency Protection (Roll off)
5.1.1 To prevent over excitation, if the generator runs at
the wrong speed the ADVR activates the under
frequency protection and decreases field excitation.
5.1.2 Dip switch 1 together with the U/F adjustment,
sets the Knee-Point frequency were this
activation takes place. This adjustment is already
factory preset.
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Figure 1 Manual Field Flash
Field
SWR
-
+
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.
SECTION 7 : STARTUP ADJUSTMENT
7.1 Voltage Adjustment (VOLT)
Set VOLT and STAB full CCW. Start generator and
wait until it reaches rated frequency. Slowly adjust
VOLT CW to its rated voltage. If you are using an
external VR, set it first to its center position before
setting volts.
7.2 Stability Adjustment (STAB)
If the generator voltage oscillates back and forth, adjust
the STAB to steady the output voltage. Over
adjustment, CW may give you large voltage swings
when changing loads, Use an analog type voltmeter
when setting STAB. Connect the voltmeter to terminals
F+ and F- and slowly adjust STAB for minimum needle
movement when varying load.
7.3 Under Frequency Adjustment (U/F)
To adjust the U/F setting, select working Hz using DIP
SW 1, start the engine and adjust engine speed to
either 55 Hz or 45 Hz slow adjust U/F until the red U/F
LED turns ON. Returning the engine speed back to
normal turns the LED light off.
SECTION 8 : 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.
8.1 The polarity of field is inverse
Solution：Exchange the connection of F+ and F-.
8.2 The residual voltage is less than 5 Vac,
Solution 1：
8.2.1 Shut down generator, disconnect the wiring
between AVR and generator then flash the field.
Flashing duration = 3 seconds. (See wiring in
Figure 1)
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.
8.2.2 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 1.
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SYMPTOM
POSSIBLE CAUSES
SOLUTIONS
Voltage does not
build up
Engine under speed
Please refer to generator service manual
Low residual voltage
Please refer to section 8. Field Flashing
B, C, F+, F-, Terminal connection not
properly connected
Reference from Figure 3 Figure 5
Defective generator
Please refer to generator service manual
Blown Fuse
Over excitation current / incorrect wiring
Reference from Figure 3 Figure 5
Low output voltage
A, C, B, C, Terminal incorrect connection
Reference from Figure 3 Figure 5
Defective VR or not properly connected
Check connection and VR
Under frequency
Please refer to generator service manual
Incorrect exciter specification
Please refer to generator service manual
AVR Incorrect voltage selected
Please refer to section 4. DIP Switch setting
Over output voltage
A, C, terminals not properly connected or
incorrectly connected
Reference from Figure 3 Figure 6
AVR Incorrect voltage selected
Please refer to section 4. DIP Switch setting
Output voltage
unstable (Hunting)
「
STAB」Stability incorrectly adjusted
Please refer to section 6. Adjustment
ATTENTION
1. AVR can be mounted directly on the engine, genset, switchgear, control panel, or any position that will not
affect operation. For dimension reference, please see Figure 2.
2. All voltage readings are to be taken with an average-reading voltmeter Meggers and high-potential test
equipment must not be used. Use of such equipment could damage the AVR.
3. Improper setting of under-frequency protection could cause the output voltage of the unit to drop or
become unstable under with changes in load. Avoid making any changes to the U/F setting unless
necessary.
ADVR-073
G
~
S
T
R
N
1000 OHM
EXT. VR
ADVR-073
87.0
115.0
122.0
150.0
20.5
51.0
5.3
O/E Over Excitation protection
SW-1 Frequency Selection
SW-2 Sensing Voltage Selection
SW-3 Activate Over-Excitation Protection
Unit : mm
U/F Frequency protection
Figure 2 Outline Drawing
SW-2 ON 170 260 Vac
Figure 3
SECTION 9 : TROUBLE SHOOTING
SECTION 10 : FIGURE AND SIZE
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ADVR-073 5
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ADVR-073
G
~
S
T
R
N
1000 OHM
EXT. VR
ADVR-073
G
~
S
T
R
N
1000 OHM
EXT. VR
G
~
S
T
R
N
1000 OHM
EXT. VR
ADVR-073
20~200 OHM
DIODE
Field
SWITCH
BATT.
ADVR-073
G
~
S
T
R
N
Field
Aux. winding
1000 OHM
EXT. VR
SW-2 ON 170 260 Vac
Figure 4
SW-2 OFF 340 520 Vac
Figure 5
With Aux. Winding
Figure 7
Flash With Battery
Figure 6
※
Use only replacement fuses specified in this user manual.
※
Appearance and specifications of products are subject to change for improvement without prior notice.
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