EA04A
Generator Automatic Voltage Regulator
Operation Manual
Self Excited Automatic Voltage Regulator
Compatible With Basler VR63-4 & VR63-4A*
* Use for reference only and not genuine Basler product.
Kaohsiung : No.3, Lane 201, Chien Fu ST., Chyan Jenn Dist., Kaohsiung, TAIWAN
Tel : + 886-7-8121771 Fax : + 886-7-8121775
URL : http://www.kutai.com.tw Email : service@mail.kutai.com.tw
1. INTRODUCTION
Sensing & power Inpuut External Volts Adjustmen
Voltage 90 ~ 132 VAC / 171 ~ 264 VAC ±15% with 1K ohm 1 watt trimmer
DIP switch selectable
Frequency 50 / 60 Hz, selectable EMI Suppression
Internal electromagnetic interference filtering
Output
Voltage Max. 32 VDC @ 110 VAC input Unit Power Dissipation
Max. 63 VDC @ 220 VAC input Max. 8 watt
Current Continuous 4A Under Frequency Protection ( Factory Setting )
Intermittent 7A for 60 sec. 60 Hz system presets knee point at 55 Hz
Resistance Min. 15 ohm Max. 100 ohm 50 Hz system presets knee point at 45 Hz
Voltage Regulation Over Excitation Shutdown
< ± 1% ( with 4% engine governing ) Field volts shut down after a time delay if exciter
field volts exceed 100 ± 5 VDC.
Voltage Build-up
Beyond 135 VDC, field volts will be removed
Residual voltage at AVR terminal > 5 VAC immediately
Thermal Drift Dimensions
0.05% per °C change in AVR ambient 100mm L * 68.5mm W * 33mm H
Weight
230 g ± 2%
2. FREQUENCY COMPENSANION 4. VOLTAGE ADJUST RHEOSTAT
The frequency compensation characteristic to Screwdriver adjustable potentiometer adjusts
improve system load pickup performance by generator output voltage. Adjustment CW increases
restraining voltage recovery until frequency has also voltage.
started to recover.
When using remote voltage adjust rheostat (VAR),
For 50Hz system, the regulator is preset at the the VAR wire on the regulator should be cut and the
factory for a 45Hz “corner frequency”. For 60Hz rheostat connected to both ends. A 1k ohm and 1
systems, a 55Hz “comer frequency”. is achieved by watt resistance is adequate for most applications.
cutting the external Hz jumper wires on the See Interconnection Diagrams.
generator. Be sure to insulate the two wires so that
they are not exposed. 5. FIELD FLASHING
When the regulator is operated with the generator
3. OVEREXCITATION SHUTDOWN
for the first time, the polarity residual magnetism
If the exciter field voltage exceeds 100 ± 5 VDC, the may not correct or the magnitude not enough. If the
regulator automatically removes the field current generator does not build-up after shartup, shut
after a time delay. The time delay is inversely down the prime mover and proceed with the
proportional to the magnitude of the detected following steps:
overvoltage condition up to the 135 VDC point.
Beyond 140 VDC, the field voltage is removed
within 0.2 seconds.
After shutdown, reset the regulator by decreasing
voltage below 6 VAC either by stopping the prime
mover or interrupting the regulator input with a reset
switch for 2 seconds or more.
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2 EA04A
5.1 With the prime mover at rest, apply a dc 5.3 Start prime mover and measure voltage at
source (not grounded) of not more than 12V, regulator leads 3 and 4. If voltage is greater
to terminals F+ (positive) and F- (negative) in then 5 volts, voltage build-up should be
series with a limiting resistor of 3 ~ 5 ohms. successful. Repeat field flashing procedure if
less than 6V residual is measured.
5.2 Allow approximately 3 seconds before
removing the dc source. 5.4 If repeating steps 1 and 2 does not result in
generator voltage build-up, replace the
voltage regulator.
120
GENERATOR OUTPUT VOLTAGE
100
( % OF MONINAL)
80
50HZ
60HZ
60
40
20
0 10 20 30 40 50 60
FREQUENCY (HZ)
Outline dimension Frequency compensation curves
Figure 1 Figure 2
R
S G
T
~
N
Field
1K OHM
HZ HZ 3 F+ F- 4 VAR VAR
EA04A
Interconnection Diagram, 208 ~ 240V Nominal
Figure 3
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EA04A 3
