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2
EA04C
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.
