Generator Automatic Voltage Regulator Operation Manual

SX460
Generator Automatic Voltage Regulator
Operation Manual
Self Excited Automatic Voltage Regulator
Compatible with Newage SX460*
* Use for reference purpose only and not a genuine Newage product.
1. INTRODUCTION
Sensing Input
Voltage
Frequency
Output
Voltage
Current
Resistance
95 ~ 132 VAC or 190 ~ 264 VAC
1 phase, jumper selectable
50 / 60 Hz, selectable
Max. 90 VDC @ 207 VAC
Continuous 4A
Intermittent 10A for 10 sec.
Min. 15 ohm
Voltage Regulation
< ± 1.5% ( with 4% engine governing )
Voltage Build-up
Residual voltage at AVR terminal > 5 VAC
Thermal Drift
0.05% per °C change in AVR ambient
2. WIRING (Refer to Fig 4)
External Volts Adjustment
±7% with 1K ohm 1 watt trimmer
Unit Power Dissipation
Max. 10 watt
Under Frequency Protection
Set point
95% Hz
( UFRO )
Slope
170% down to 30 Hz
Soft Start Ramp Time
2 sec.
Dimensions
135mm L * 100mm W * 49mm H
Weight
243g ± 2%
2. When operations, please do not touch the
warning signal of the heat sink.
1. Connect F1, F2 to DC output port.
2. Connect the sensing port at 7, 8 (the factory setup
is 220V, if 110V is required, please join 3, 4)
3. External voltage regulator is as Figure 4.
4. Connect a jumper from COM to the 50Hz
terminal for 50Hz operation.
Note :
please install 5A 250V fuse at power input port
as Figure 4.
3. NOTICE OF USE
3.3 System Startup
1. Ensure all the wire of the regulator are correctly
connected and the proper fuse (5A250V) is
installed.
2. Turn voltage potentiometer full anticlockwise
( lowest voltage level).
3. If used, turn external voltage potentiometer to the
middle position.
4. Turn stability potentiometer
(highest stability level).
full
clockwise
3.1 See figure 1
5. Connect a 110VDC meter across the field with
proper polarity.
1. The connection and examination procedures
must be executed by the profession engineers.
6. Connect a 300VAC meter across line to neutral
of generator.
2. Place the EA460 inside of the generator,
especially the moisture-proof and anticorrosive
space.
7. 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.
3.2 Startup procedure
1. The surface temperature pf the EA460 will be
over 60 °C.
2
8. Slowly adjust voltage potentiometer until the
generator voltage reach the proper value.
9. Turn the stability potentiometer clockwise until
instability is shown, and then turn it anticlockwise
slightly still both meter mention in (5) and (6)
shown stable.
10.Interrupt regulator power for a short time
(approximately 1 to 2 second). If the voltage still
stable, the adjustment is now completed.
Otherwise increase the stability slightly, repeat
procedure (10) until stability is reached.
4. ADJUSTMENTS
4.1 Frequency roll-off adjustment
fi As using 50Hz, please connect a jumper between
Com and 50Hz. As 60Hz, between Com and 60 Hz.
fi To reset the frequency roll-off, proceed as follow:
1. Startup engine and build voltage.
2. Adjust the engine speedy down to low frequency.
3. Adjust the front panel U/F control until the output
voltage low about 5V than nominal voltage. ( For
50Hz applications, the frequency “roll-off” is
factory preset to 45Hz, for 60Hz operation, the
frequency is 55Hz).
4.2 Voltage Adjustment
1. With the Prime-mover at rest and the regulator’s
field output wires disconnected, apply a DC
source ( NOT grounded ) of not more than 3~12
Vdc with Positive to F+ and Negative to F-, in
series with a current-limiting resistor of 3~5 ohms
20 watt. (The set battery is a suitable source.)
2. Allow approximately 3 seconds before removing
the DC source.
3. With the voltage regulator disconnected ( wires 3
and 4 ), start the prime mover and measure the
“ residual ” voltage available at the auxiliary
winding. If this voltage is greater than 5 Vac,
reconnect voltage regulator, and voltage build-up
should be successful. If less than 5 Vac is
measured, repeat field flashing procedure.
4. If repeating steps a. and b. does not result in
generator voltage build-up, and residual is
greater than 5 Vac, replace voltage regulator.
WARNING
This Automatic Voltage Regulator is not
equipped with loss-Sensing Protection
function / Over Excitation Protection. An
additional Over-Voltage Protection device for
load may be required to avoid possible
damage to the equipment or severe personal
injury
or
death.
1. Adjust the front panel VOLT to vary the generator
nominal voltage.
2. If used, a 1000 ~ 1500Ω 1/2 watt potential meter
may be connected to terminals VR and VR, refer
to Figure 4.
4.3 Stability Adjustment
1. Adjust the front panel STAB control the system
stable. Rotation of the front panel STAB control
in the counter-clockwise (CCW) direction will
speed response time. If rotated too for CCW, the
generator voltage my oscillate (hunt).
2. Rotated the front panel STAB control CCW until
the system start oscillating and then rotate cw
just past the point where oscillation occurred.
5. FIELD FLASHING
When the regulator is operated with the generator for
the first time, the polarity of residual magnetism may
be reversed or too small to achieve the necessary
build-up voltage for the regulator. If reversing the field
connections does not induce build-up, and the residual
voltage is less than the specified value of 5 Vac, shut
down the Prime-mover and proceed with the following
steps :
3
4
80
50HZ
60HZ
60
40
20
0
10
20
30
40
50
60
120
100
( % OF MONINAL)
100
( % OF MONINAL)
GENERATOR OUTPUT VOLTAGE
120
GENERATOR OUTPUT VOLTAGE
Outline Drawing
Figure 1
80
60
40
20
0
1
FREQUENCY (HZ)
SOFT START (V/Sec)
Frequency Compensation Curves
Figure 2
Soft Start Curve
Figure 3
2
5A
Wiring and adjustment
Figure 4
Volts adjustment
1K Ohms
Sensing volts selection
Close 110v Open 220v
Low Hz Indicator LED
Hz setting
Working Frequesncy Selection
Stab. Adj.
Note :
1. When there is no connection to VR, 1 and 2 must be joined.
2. When LED lamp is light on, it means the frequency isn’t enough ,The output voltage will decrease to
prevent over load exciting current to damage the exciter field winding.
6. TROUBLE SHOOTING
SYMPTOM
Voltage does not
build up
Out voltage low
Out voltage high
Out voltage instable
CAUSE
CORRECTION
Residual voltage below 5VAC
Flash generator field with proper method
Incorrect wiring
Check wiring diagram for proper connection
Power/sensing or field wires not
connected
Connect the wires properly
Generator not up to speed
Increase generator speed
Poor adjustment is made
Read start procedure carefully and adjust again
Frequency roll-off
Increase generator speed
Incorrect voltage selection
Read user’s manual to select correct voltage
Poor adjustment is made
Read start procedure carefully and adjust again
Incorrect voltage selection
Read user’s manual to select correct voltage
Poor adjustment is made
Read start procedure carefully and adjust again
Field voltage requirement lower
the rang of regulator
Inquire our distributor to solve
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