Basler Electric APR63-5X - Manual

Publication
9168700992
Revision
D
First Printing: 08/93
Revised: 07/05
Copyright
2005
FOR
VOLTAGE REGULATOR
APR 63-5X
INTRODUCTION
The APR 63-5X Voltage Regulator controls
the dc field power of a conventional, 400 Hz
brushless generator that has a 63 Vdc field
to regulate the generator output voltage. The
APR 63-5X regulates the generator output
by sensing the generator output voltage,
converting it to a dc signal, and comparing
the signal to a reference voltage. An error
signal is developed and used to control the
dc field power in order to maintain a con-
stant generator voltage.
The APR 63-5X is contained in an encapsu-
lated, plastic case.
SPECIFICATIONS
Power Input
Configuration: 1-phase, 400 Hz
Range:
190 to 277 Vac, ±10%
Burden: 650 VA maximum
Dissipation: 25 W maximum
Sensing Voltage
Configuration: 1-phase, 400 Hz
Range
240 Vac:
190 to 240 Vac
480 Vac: 380 to 480 Vac
Burden: 5 VA
Power Output ∗
Continuous:63 Vdc, 5 Adc, 315 W
1-Min. Forcing: 105 Vdc, 8.5 Adc, 893 W
∗ With 240 Vac input power.
DC Exciter Field Resistance
12.6 to 100
Ω
Voltage Adjustment Range
Internal
170 to 264 Vac or 340 to 528 Vac using the
internal voltage adjust.
External
±10% of the nominal value determined by
the internal voltage adjust. A 1 k
Ω, 2 W
potentiometer with a locking, screwdriver-
adjusted shaft is supplied with the APR 63-
5X for remote mounting.
Regulation
Accuracy:
±0.5%
Voltage Drift: < ±1% variation for a 50°C
(90 °F) change
Response: <1 cycle
Voltage Buildup
Automatic voltage buildup from generator
residual voltage as low as 6 Vac.
Frequency Compensation
See Figure 1
Overexcitation Shutdown
See Figure 2. If the field voltage exceeds
100
±5 Vdc, the APR 63-5X automatically
removes the field current after a time delay.
The time delay is inversely proportional to
the magnitude of the detected overvoltage
condition. At approximately 135
±5 Vdc, the
field voltage is removed instantaneously.
Upon detection of overexcitation and the
resulting field voltage shutdown, the APR
63-5X will not reset or return to an opera-
tional condition until the generator output
drops to less than 6 Vac for 10 seconds.
Shock
Withstands up to 15 G in each of 3 mutually
perpendicular axes.
Vibration
5 to 26 Hz:
1.2 G
27 to 53 Hz: 0.036” double amplitude
54 to 1,000 Hz: 5.0 G
Temperature
Operating:
–40 to 60 °C (–40 to 140°F)
Storage: –65 to 85 °C (–85 to 185°F)
Weight
1,110 g (2.5 lb)
INSTALLATION
Mounting
The APR 63-5X may be mounted in any
position. The APR 63-5X may be mounted
directly on the generator using ¼” hardware.
Select the proper hardware to withstand any
expected transportation and operating con-
ditions. Outline drawings are provided in
Figures 3 and 4.
Connections
APR 63-5X connection diagrams are pro-
vided in Figures 5 through 7.
Connecting Procedure
CAUTION
Do not make any connections to the 50 Hz,
60 Hz, or COM terminals.
1. Connect terminals F+ and F– to the field.
Observe proper polarity.
2. Connect terminals 3 and 4 to the genera-
tor output. Fuse both leads. If desired, in-
stall a shutdown switch.
3. Connect either the 240 or 480 terminal to
the sensing source. Sensing should be
connected line-to-line.
ADJUSTMENTS
Field Flashing
When the regulator is operated with the
generator for the first time, the polarity of the
residual magnetism may be incorrect or of
insufficient magnitude. If the residual voltage
at terminals 3 and 4 is greater than 6 Vac,
replace the regulator. If generator residual
voltage is less than 6 Vac, stop the prime
mover and proceed with the following steps.
CAUTION
The regulator may be damaged if the field is
flashed with the generator in motion.
1. With the prime mover at rest, apply an
ungrounded dc source of not more than
48 Vdc to terminals F+ and F– in series
with a limiting resistor. Use 1
Ω of resis-
tance for each volt from the dc power
source with a power rating of at least 1 W
per ohm. For example, if using a 24 Vdc
source, use a 24
Ω, 24 W resistor.
2. Allow the field to be flashed for approxi-
mately 10 seconds before removing the
dc source.
3. If voltage does not build up after perform-
ing steps 1 and 2, verify the polarity of the
dc source and perform steps 1 and 2
again.
APR 63-5X Controls
FREQ
This control prevents generator and regula-
tor damage by decreasing the generator
output voltage when the generator fre-
quency decreases. To set the frequency roll-
off, perform the following steps:
1. Adjust the generator rpm to the desired
frequency compensation (corner fre-
quency roll-off) point.
2. Adjust the FREQ control until the output
voltage begins to drop-off.
3. Increase the generator rpm to nominal.
The output voltage should return to nor-
mal.
STAB
This control allows the generator response
time (and thus voltage stability) to be ad-
justed. Use an oscilloscope or other voltage
recording device to set the STAB control.
Clockwise rotation of the STAB control
slows response time and counterclockwise
rotation of the STAB control speeds re-
sponse time. If the STAB control is rotated
too far counterclockwise, the generator volt-
age may oscillate (hunt).
When adjusting the generator response
time, rotate the STAB control counterclock-
wise until the system starts oscillating and
then rotate the control clockwise just past
the point where oscillation occurred.
VOLT
Clockwise rotation of the VOLT control in-
creases the generator output voltage.
Replacing the jumper connected across
terminals 6 and 7 with a 1 k
Ω, 2 W potenti-
ometer allows a ±10% voltage range ad-
justment with the nominal level set by the
VOLT control. If a range less or greater than
that provided by the 1 k
Ω potentiometer is
desired, a 2 W potentiometer of any value
from 50 to 5,000
Ω may be substituted.
OPERATION
Before proceeding with system startup,
confirm the following:
• Verify that the APR 63-5X specifications
conform with the requirements of the
generator system.
• Ensure that the APR 63-5X has been
installed and connected in accordance
with
Installation, Mounting and Connec-
tions.
During periods of prime mover idling, use
the shutdown switch to remove power from
the APR 63-5X.
System Startup
System startup is achieved by performing
the following steps. If the desired results are
not achieved during startup, refer to the
procedures listed under
Troubleshooting.