Kutai electronics EA04C User manual

KUTAI ELECTRONICS INDUSTRY CO., LTD.
TEL : [phone] FAX : [phone] Website : www.kutai.com.tw
Headquarters : No.3, Ln. 201, Qianfu St., Qianzhen Dist., Kaohsiung City 80664, Taiwan
EA04C
Generator Automatic Voltage Regulator
Operation Manual
Self ExcitedAutomatic Voltage Regulator
Compatible replacement for Basler VR63-4, VR63-4A and Marathon SE100A *
* Use for reference only and not genuine Basler product.
Use with Kutai EP200 Paralleling Module for parallel operation

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2EA04C
1. SPECIFICATION
Sensing & power Input
Voltage 160 ~ 265 / 300 ~ 550VAC
DIP switch selectable
Frequency 45 / 55 Hz, selectable
Output
Voltage Max. 63 VDC @ 240 VAC input
Current Continuous 4A
Intermittent 7A for 60 sec.
Resistance Min. 15 ohm Max. 100 ohm
Voltage Regulation
< ± 1% ( with 4% engine governing )
Voltage Build-up
Residual voltage at AVR terminal > 5 VAC
Thermal Drift
0.05% per C change in AVR ambient
External Volts Adjustment
±15% with 1K ohm 1 watt trimmer
EMI Suppression
Internal electromagnetic interference filtering
Unit Power Dissipation
Max. 8 watt
Under Frequency Protection ( Factory Setting )
50 Hz system presets knee point at 45 Hz ±4%
60 Hz system presets knee point at 55 Hz ±4%
DIP switch selectable
Over Excitation Shutdown
Field volts shut down after a time delay if exciter
field volts exceed 100 ± 5 VDC.
Beyond 135 VDC, field volts will be removed
immediately
Operating temperature
-40C (-40F) to +60 C (+140F)
Storage temperature
-65C (-85F) to +85 C (+185F)
Dimensions
101mm L * 69mm W * 47.3mm H
Weight
175 g ±2%
2. WIRING (Refer to Figure 3)
●Power input 3, 4.
●Sensing input 4, P.
●F+, F–: Exciter.
●EXT. VAR : External Voltage Adjustment.
3. FREQUENCY COMPENSANION
The frequency compensation characteristic to
improve system load pickup performance by
restraining voltage recovery until frequency has also
started to recover.
For 50Hz system, the regulator is preset at the
factory for a 45Hz “corner frequency”.
For 60Hz systems, a 55Hz “comer frequency”.
●DIP switch 1 ON for sensing 160 ~ 265VAC.
●DIP switch 1 OFF for sensing 300 ~ 550VAC.
●DIP switch 2 ON for 50Hz generator system.
●DIP switch 2 OFF for 60Hz generator system.
4. OVEREXCITATION SHUTDOWN
If the exciter field voltage exceeds 100 ± 5 VDC, the
regulator automatically removes the field current
after a time delay. The time delay is inversely
proportional to the magnitude of the detected over
voltage 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.
5. STARTUP PROCEDURE
5.1 Setting
1. Ensure the AVR model and the generator are
compatible.
2. Ensure all the wires of the regulator are correctly
connected.

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EA04C 3
3. Ensure proper fuse is installed.
4. Turn voltage and stability potentiometer full
anticlockwise (lowest voltage level).
5. If used, turn external voltage potentiometer to the
middle position.
6. Use 600 VAC Voltage meter connect to AC
output terminal and measure the output voltage.
5.2 Startup Procedure
1. To start and run the generator at no load and
rated speed. The generator output voltage
should build up to a minimum level if the voltage
does not build up, It may cause by low residual
voltage of generator. Refer to field flashing
section in generator manual.
2. Slowly adjust voltage potentiometer until the
generator voltage reach the proper value.
6. STABILITY ADJUSTMENTS
1. Slowly rotate the STAB control in the clockwise
(CW) direction will change the AVR and
generator’s response time, if over adjusted the
voltage will become unstable, if under, the
instant heavy load voltage will change
significantly.
2. It is advised to use a voltmeter DCV to adjust the
STAB control F+, F–until the oscillate becomes
minor. By doing so helps to improve and reduce
the voltage change under heavy load.
7. FIELD FLASHING
When the regulator is operated with the generator
for the first time, the polarity residual magnetism
may not correct or the magnitude not enough. If the
generator does not build-up after startup, shut down
the prime mover and proceed with the following
steps :
1. With the prime mover at rest, apply a dc source
(not grounded) of not more than 12V, to
terminals F+ (positive) and F–(negative) in
series with a limiting resistor of 3 ~ 5 ohms.
2. Allow approximately 3 seconds before removing
the dc source.
3. Start prime mover and measure voltage at
regulator leads 3 and 4. If voltage is greater then
5 volts, voltage build-up should be successful.
Repeat field flashing procedure if less than 6V
residual is measured.
4. If repeating steps 1 and 2 does not result in
generator voltage build-up, replace the voltage
regulator.
WARNING
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.
Volt
EXT
VR
FUSE
5A SW Stab
FUSE VR
EXT
Volt
SW
Stab
F- 3F+ 4 P
(% OF NOMINAL)
GENERATOR OUTPUT VOLTAGE
0
40
20
60
10 20 30 40 6050
80
100
120
50HZ 60HZ
FREQUENCY (HZ)
Outline dimension
Figure 1
Frequency compensation curves
Figure 2
UNIT : mm

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4EA04C
CAUTION
Meggers and high potential test equipment
must not be used. Incorrect use of such
equipment could damage the semiconductors
contained in the regulator.
R
P
T
S
VARF-
EA04C
3F+
4VAR
1K OHM
Field
~
G
N
SW 1 2 3
SW
S
T
R
3F+ F- VAR
4VAR
P
1 32 EA04C
1K OHM
G
Field
~
8. SW DESCRIPTION
(1) SW-1 Sensing voltage selector
ON for 220V OFF for 380 / 480V.
(2) SW-2 Frequency selector
ON for 50Hz OFF for 60Hz.
(3) SW-3 Response
ON for fast OFF for slow.
※Use only original supplied spare protection fuse for fuse replacement.
※Please accept our sincere apology if any modification in performance, specification or appearance is
made without prior notice.
※SW-1 OFF for 380/480VAC system
(3Ø 4W 380/480 VAC)
Figure 3
SW-1 ON for 220VAC system
Figure 4
SW 1 2 3
ON
AC Power Input :
3, 4 90 ~ 240VAC 50/60Hz
Sensing Input :
P, 4 160 ~ 265VAC 50/60Hz
300 ~ 550VAC 50/60Hz
DC Output Power :
F+, F–Max 63VDC 4A
EXT. VAR (1 K)