Basler Electric VR63-4C/UL - Manual (Page 2)

to a change in load. Clockwise rotation of this
adjustment provides an increase in the
response time and therefore decreases the
amount of voltage overshoot (increased
stability). Counterclockwise rotation of this
adjustment provides a decrease in the
response time (faster response time) and
therefore increases the amount of voltage
overshoot (decreased stability).
OPERATION
The following system operation procedures
provide instructions for adjusting the VR63-
4C/UL Voltage Regulator.
CAUTION
Meggers and high potential test
equipment must not be used. Incorrect
use of such equipment could damage the
semiconductors contained in the
regulator.
PRELIMINARY SET-UP
To prevent damage to the regulator, complete
the following steps before proceeding with
system start-up.
a. Verify that the voltage regulator
specification conforms with the generator
system requirements.
b. Ensure that the regulator is correctly
connected to the generator. See
Interconnection Diagrams.
c. Install fuses per FUSES paragraph.
d. Set the regulator VAR fully CCW and the
remote VAR (if used) to centered.
SYSTEM START-UP
a. Start the prime mover and bring up to
rated speed. Voltage should buildup. If a
minimum residual of 6 Vac is not present,
perform field flashing.
b. Slowly adjust VAR CW until voltage
reaches nominal value. If used, adjust
remote VAR to set generator output to
exact value desired.
OPERATIONAL TEST
a. Connect the test setup as shown in
Operational Test. Do not apply power.
b. Adjust regulator VAR and/or remote VAR
to maximum CCW.
c. Apply 120V, 50/60 Hz power to regulator.
RESULT: Light bulb should flash momentarily.
d. Slowly adjust the regulator VAR control
CW.
Operational Test
RESULT:
1) Before minimum brilliance is reached, the
light bulb should reaches maximum brilliance
to signify the regulating point.
2) At the regulating point, a small change in
the VAR should turn the light bulb on or off.
FIELD FLASHING
When the regulator is operated with the
generator for the first time, the polarity of
residual magnetism may not be 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:
a. 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.
b. Allow approximately 3 seconds before
removing the dc source.
c. Start prime mover and measure voltage
at regulator leads 3 and 4. If voltage is
greater than 6 volts, voltage build-up
should be successful. Repeat field
flashing procedure if less than 6 V
residual is measured.
d. If repeating steps 1 and 2 does not result
in generator voltage build-up, replace the
voltage regulator.
ACCESSORY EQUIPMENT
Voltage Adjust Rheostat for remote mounting -
Order Basler P/N 17724 for locking, slotted
shaft rheostat.
Interconnection Diagram, 208/240 V Nominal, 3-Phase, 4-Wire
Interconnection Diagram, 240 V Nominal, 3 Phase, 3-Wire
Interconnection Diagram, 120/240 V Nominal, Single-Phase with Neutral
Interconnection Diagram, 120 V Nominal, Single Phase