Basler Electric APR63-5X - Manual (Page 2)

Page
2
First Printing: 08/93
Revised: 07/05
Revision
D
Publication
9168700992
1. Start the prime mover and bring it up to
rated speed.
2. Slowly adjust the VOLT control (or exter-
nal potentiometer) until nominal generator
voltage is achieved.
3. Check stability by applying and removing
load.
4. Check regulation under normal operating
conditions.
5. Reduce the generator frequency to ap-
proximately 373 Hz. The generator output
should decrease from this point.
Troubleshooting
If the system does not operate as expected,
use the following information to determine
the cause and remedy.
Generator Voltage Does Not Build
There may be no or incorrect input voltage
applied to APR 63-5X terminals 3 and 4.
Verify the wiring and check the fuses and
shutdown switch.
The field may require flashing—flash the
field.
The overexcitation function may be shutting
the APR 63-5X off. Stop the prime mover
and then restart. Watch for high voltage.
Voltage Builds and then Decays
The voltage adjust circuit may be open. If an
external potentiometer is not used, verify
that a jumper is installed across terminals 6
and 7. If an external potentiometer is used,
the potentiometer may be defective or of the
wrong value. Check the potentiometer and
wiring and correct as necessary.
Figure 1. Frequency Compensation Curves
Figure 2. Typical Inverse Time Delay
Characteristic Curves
Voltage Does Not Build to the Rated Value
The jumper across APR 63-5X terminals
CB+ and CB– may be missing—install the
jumper.
Sensing may be connected to the wrong
terminal. Correct the sensing connections as
required.
The setting of the internal or external voltage
adjust may be incorrect. Adjust the VOLT
control or external potentiometer as needed.
Voltage High and Uncontrollable
Generator sensing may not be connected to
the APR 63-5X or may be connected to the
wrong terminal. Correct the sensing connec-
tions as needed.
Generator Response is Too Slow or Hunting
The generator load may be excessive or the
generator output may be shorted. Check the
generator load.
The STAB control may be improperly set.
Adjust the STAB control according to the
guidelines provided in
Adjustments, APR 63-
5X Controls, Stab.
Poor Regulation
The resistance of the field may not be
matched to the capability of the APR 63-5X.
Compare the field resistance with the speci-
fied field resistance range of the APR 63-5X.
The APR 63-5X output rating does not meet
the requirement of the generator. Compare
the excitation requirement of the generator
with the specified output range of the APR
63-5X.
The speed of the prime mover may be too
low. Check the speed of the prime mover.
The voltmeter may not be connected at the
same point as the regulator sensing. Verify
the voltmeter connections. Also verify that
an average-sensing voltmeter is used—not
an rms-sensing voltmeter.
Frequency Roll-Off Not Working
The FREQ control may be improperly set.
Adjust the FREQ control according to the
guidelines provided in
Adjustments, APR 64-
5X Controls, Stab.
Operational Test
To verify APR 63-5X functionality, perform
the following steps.
1. Connect the regulator as shown in Figure
8 and apply 240 Vac as shown.
2. Adjust the VOLT control fully counter-
clockwise. Observe that the lamp does
not light.
3. Adjust the VOLT control fully clockwise.
4. Adjust the VOLT control counterclockwise
until the lamp just goes out.
Regulator operation is satisfactory if the
above results are obtained. However, stabil-
ity must be tested with the regulator and
generator operating.
Figure3. Mounting Dimensions