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EA448B 3
SECTION 3: DIP SWITCH SETTING
X1、X2：Power Input
Connect working voltage, Max. 150Vac
Z1、Z2：Auxiliary Power Input
Connect Auxiliary voltage, Max. 150Vac
50Hz、60Hz：Frequency Selection
E+、E-：Excitation Output
Connect to generator excitation field
E1、E2：Sensing Input
Connect sensing input voltage Max. 600Vac
Sensing Input Voltage Selection
1 OFF 2 OFF ：110Vac (95~140V)
1 ON 2 OFF ：220Vac (170~260V)
1 ON 2 ON ：380Vac (340~520V)
S1、S2：Quadrature Droop Input
Connect to generator CT
1KΩ：External Voltage Adjustment
Connect to external 1KΩ potentiometer
Terminals must be shorted when not in used
3Ph.：Three Phase Sensing Input
Connect to Three Phase Sensing
Module
EXC.MAX.：Over Excitation Current Limiting
Excitation output will be turn off when excitation
current is over the setting value
Min. 3.5A, Max. 10A
V/Hz：Under Frequency Adjustment
Adjustment for Under frequency and LAM
knee point
STAB.：Stability Adjustment
Under no-load operation, slowly adjust the
STAB VR counterclockwise until the
voltage is unstable, and then adjust it
clockwise for about 1/5 circle
VOLT：Voltage Adjustment
Adjust Generator output voltage
Adjustment range can be set by DIP SW
STAT.：Quadrature Droop Adjustment
Adjust the ratio of the idle power to the
voltage drop, when used in parallel.
Adjustment range is 0% to 7%
J1 Connected：With LAM protection
LAM：When Generator is loading the Engine speed will be
reduced. When engine speed is lower than pre-set frequency
threshold (V/Hz knee point), AVR will reduce voltage in 13%
or 25% (set by J2). This will make the active power of loading
reduce 25% to 45%, until engine speed reach pre-set value
once again then voltage will resume to normal value.
J1 Disconnected：Without LAM protection
When J2 1–2 is shorted：Drop ratio 13% in LAM voltage
When J2 2–3 is shorted：Drop ratio 25% in LAM voltage
LED：LED will illuminate when AVR in normal operation
ST6
ST1
ST2
VOLT
STAB.
V/Hz
EXC.MAX.J1
J2
ST7
1 2 3
STAT.
X2
Z1
X1
Z2
E+
E-
E1
E2
50Hz 60Hz
LED
EA448B
ST1：Single Phase / Three Phase Sensing Selection
Shorted：Single phase sensing
Open：Three phase sensing (must use with Three Phase Sensing Module)
ST2：Response Time Selection
Shorted：Slow
Open：Fast
Select response time according to Stability adjustment
ST6：Instantaneous Compensation for Voltage
Shorted：For Generator less than 600 KVA
Open：For Generator greater than 600 KVA
ST7：Keep shorted
