___________________________________________________________________________________________
EA230
3
SECTION 2 : WIRING
2.1
Operation
The following system operation procedures provide
instructions for adjusting the EA230 voltage regulator.
Symptoms resulting from a faulty regulator and certain
generator system problems are included, together with
suggested remedies.
2.2
Wiring (Refer to Figure 2, 3)
2.2.1 Connect E+1, E- to DC output port.
2.2.2 Connect the sensing port at 100V, 0V
2.2.3 External voltage regulator is as Figure 2, 3
Complete the following steps before proceeding with
the system start-up.
ATTENTION
Meggers and high potential test equipment must
not be used. Incorrect use of such equipment
could damage the semiconductors contained in
the regulator.
2.3
Preliminary SET-UP
2.3.1 Verify that the voltage regulator specifications
conform with the generator system requirements.
2.3.2 Ensure the voltage regulator is correctly
connected to the generator system.
2.3.3 Install the correct fuse (8A / 250V) to prevent
damage caused from short circuit.
2.3.4 Set the regulator
「
VOLT
」
and external
「
VOLT
ADJ
」
( if used ) as follows:
Regulator
「
VOLT
」
: Fully CCW
Remote
「
VOLT
」
: Centered
2.3.5 Adjust the front panel STAB control that controls
the system stability. Rotation of the front panel
STAB control in the counter-clockwise (CCW)
direction will speed up response time and if over
rotated in CCW direction, the generator voltage
may oscillate (hunt).
2.3.6 Rotated the front panel STAB control CCW until
the system start oscillating and then rotate CW
just past the point where oscillation occurred.
2.4
System START-UP
2.4.1 Perform preliminary set-up as described in the
above paragraphs.
ATTENTION
The AVR reading AC voltage are all average
value.
2.4.2 Start prime mover and bring up to rated speed.
RESULT :
Voltage should build up. If not, perform Field Flashing.
2.4.3 Slowly adjust the regulator
「
VOLT
」
CW until the
generator output voltage reaches the nominal
value. If used, adjust the remote
「
VOLT
」
to set
the generator voltage to the exact value desired.
RESULT :
Voltage should build up to rated value. If voltage does
not build up to the rated value, check generator for
short or excessive load.
2.4.4 Check regulator under normal operating and
loading conditions.
RESULT :
Voltage regulation should be better than +/- 1.0%
no-load to full-load. If regulation is not within this range,
perform the following steps :
(1) Voltage reduction under load may be due to speed
change from no load to full load. causing the
frequency compensation (V/Hz) circuit to reduce
voltage at lower frequencies.
(2) Replace voltage regulator.
2.5
Operational Test
2.5.1 Connect the test setup as shown in the following
figure, Operational Test. Do not apply power.
Ensure that the light bulb is rated for 120V and is
less than 100W.
2.5.2 Adjust the regulator
「
VOLT
」
or remote
「
VOLT
」
to maximum CW.
2.5.3 Apply 120V, 50/60 Hz power to the regulator. The
light bulb should illuminate
2.5.4 Slowly adjust the regulator
「
VOLT
」
control
CCW. At the regulation point, the light bulb
should extinguish.
