Model

www.basler.com APR 63-5

+1 618.654.2341 (USA) Part Number
info@basler.com 9168700107

Frequency Compensation
INTRODUCTION
See Figure 1.
By supplying and controlling the dc exciter field power,
the APR 63-5 regulates the output voltage of a Overexcitation Shutdown
conventional, 50 or 60 hertz, brushless generator that Output power is removed instantaneously if the field
has a 63 Vdc field. APR 63-5 voltage regulators are voltage exceeds 135 Vdc, ±5 Vdc. Output power is
CSA/UL recognized and housed in a rugged, epoxy- removed after a time delay that is inversely propor-
potted, plastic case. tional to the voltage magnitude when the field voltage
exceeds 100 Vdc, ±5 Vdc.
The APR 63-5 senses the generator output voltage,
converts it to a dc signal, and compares this signal to Agency Certifications
a reference voltage. An error signal is developed and
UL recognized and CSA certified.
used to control the dc field power in order to maintain
a constant generator output. Temperature
SPECIFICATIONS Operating: –40 to 60°C (–40 to 140°F)
Storage: –65 to 85°C (–85 to 185°F)
Power Input
OVEREXCITATION SHUTDOWN PROTECTION
Range: 190 to 277 Vac, ±10%,
1-phase If the exciter field voltage exceeds 100 Vdc (±5 Vdc),
Frequency: 50/60 Hz the APR 63-5 automatically removes field power after
Burden: 650 VA a time delay. This delay is inversely proportional to the
magnitude of the overvoltage. Figure 2 illustrates the
Sensing Input inverse time characteristic. At 135 Vdc (±5 Vdc), field
Configuration: 1-phase, tap-selectable power is removed instantaneously.
Frequency: 50/60 Hz
When field power is removed due to overexcitation,
Range
the APR 63-5 will not reset or return to operation until
240 V Tap: 190 to 250 Vac, ±10%
the generator output decreases to less than 6 Vac for
480 V Tap: 380 to 480 Vac, ±10%
a minimum of 10 seconds.
Burden: 5 VA maximum
REGULATOR CONTROLS
Power Output
Ratings APR 63-5 controls are illustrated in Figure 3 and
Maximum Continuous: 5.0 Adc, 63 Vdc, 315 W consist of FREQ, STAB, and VOLT.
One Minute Forcing: 8.5 Adc, 105 Vdc, 893 W FREQ
DC Field Resistance This control prevents generator and regulator damage
Minimum: 12.6 Ω when the generator frequency decreases by
Maximum: 100 Ω decreasing the generator output voltage. To adjust the
FREQ control:
Voltage Adjustment
1. Set the generator rpm at the desired
Internal Control frequency roll-off.
Range
240 V Tap: 170 to 264 Vac 2. Adjust the FREQ control until the voltage
480 V Tap: 340 to 528 Vac begins to decrease.

External Control 3. Increase the generator speed to nominal. The

Provided by an optional, 1,000 Ω, 2 W potentiometer output voltage should be at nominal.
(Basler P/N 17727). STAB
Voltage Buildup This control enables adjustment of the generator
Buildup is automatic from generator residual voltage response time (and thus voltage stability). Use an
as low as 6 Vac. oscilloscope or other voltage recording device to set

Publication Revision Date Copyright

9168700991 G Instructions 04/14 2014

For terms of service relating to this product and software, see the Commercial Terms of Products and Services document available at www.basler.com/terms.
this control. Observe the following guidelines when blowing fuses. If desired, install a shutdown
adjusting the STAB control. switch.
• Counterclockwise rotation of the STAB control 5. Connect the line-to-line generator sensing to
reduces the voltage response time. If rotated the regulator. Generator sensing connects to
too far, the generator voltage will hunt terminals 4 and either 240 or 480, depending
(oscillate). upon the generator voltage.
• Rotate the STAB control clockwise, just past
the point where voltage oscillation occurs. OPERATION
The following procedures are provided for APR 63-5
VOLT
setup and commissioning.
Observe the following guidelines when adjusting the
VOLT control.
Caution
• Clockwise rotation of the VOLT control
increases the generator output voltage. Meggers and high-potential test equipment
• Replacing the jumper across terminals 6 and must not be used. Incorrect use of such
7 with an external potentiometer (1,000 Ω, equipment could damage the semiconductors
2 W) gives a ±10% voltage adjustment range contained in the regulator.
with the nominal value set by the VOLT
control.
Preliminary Setup
ACCESSORY EQUIPMENT To prevent damage to the regulator, perform the
The following equipment is available as options to the following steps before proceeding with system startup.
APR 63-5: 1. Verify that the APR 63-5’s specifications re
• BE18674001 power isolation transformer compatible with the generator system
• APM 2000 and CT for parallel compensation requirements.
• MVC 300 for manual voltage control 2. Ensure that the regulator is connected
• CBS 305 Current Boost System correctly. See Figures, 4, 5, and 6.

MOUNTING 3. Install fuses per step 4 of Interconnection.

The APR 63-5 can be mounted in any convenient During periods of prime mover idling, use the
position and may be mounted directly on the excitation shutdown switch.
generator set. Figure 3 illustrates the mounting SYSTEM STARTUP
dimensions. Use #11 (ANSI) or M5 (metric) mounting
hardware. 1. Start the prime mover and bring it up to rated
speed. The generator voltage should build up.
INTERCONNECTION If a minimum residual generator voltage of 6
Connect the APR 63-5 by performing the following Vac is not present, perform the procedure
steps. Figure 4, Figure 5, and Figure 6 illustrate under Field Flashing.
typical APR63-5 connections. The torque applied to 2. Slowly adjust the regulator VOLT control until
the terminal block screws should not exceed 9 inch the voltage reaches the nominal value. If
pounds (1 Newton meter). used, adjust the remote voltage adjust
1. Configure the regulator’s nominal frequency potentiometer to set the generator output to
by connecting the jumper from COM to either the desired value.
the 50 Hz or 60 Hz terminal. 3. Apply and remove load to check for stability. If
2. If using a CBS 305 with the APR 63/5, remove the voltage is unstable, refer to the guidelines
the jumper from APR 63-5 terminals CB– and under Regulator Controls, STAB.
CB+ and connect those terminals to the CBS 4. Reduce the generator frequency (speed) to 55
305. Hz (on 60 Hz systems) or 45 Hz (on 50 Hz
3. Connect APR 63-5 terminals F+ and F– to the systems). Verify that the generator output
exciter field. Observe proper polarity. decreases from this point. If it does not, refer
to the steps under Regulator Controls, FREQ.
4. For regulator power, connect terminals 3 and
4 to the generator stator. Fuse both leads with
5 A, 250 V, high interrupting capacity, fast-

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FIELD FLASHING 120

When the generator is operated with the regulator for “Corner Frequency”
the first time, the polarity of the generator’s residual 100
magnetism may not be correct or the magnitude may
not be enough for reliable voltage buildup. If the 50 Hz

Generator Output
(% From Nominal)
80
generator voltage does not build up, stop the prime
mover and proceed as follows:
60
1. With the prime mover at rest, apply an
ungrounded dc source of not more than
60 Hz
48 Vdc to terminals F+ and F– in series with a 40
limiting resistor. Use 1 Ω of resistance for
each volt from the dc source. The resistor
20
should have a power rating of at least 1 watt
per volt.
0
2. Allow approximately 30 seconds to elapse
0 10 20 30 40 50 60
before removing the dc source.
D2717-05 Frequency (Hz)
3. Start the prime mover and measure the
voltage at regulator terminals 3 and 4. If the Figure 1. Frequency Compensation Curves
voltage is greater than 6 Vac, voltage buildup
should occur. Repeat the flashing procedure if 500
less than 6 Vac is measured. 400
300

OPERATIONAL TEST 200

If desired, perform the following steps to perform a Time Delay (seconds) 100
80
bench test of APR 63-5 operation. 60
50
1. Connect the APR 63-5 and apply 240 Vac as 40
30
shown in Figure 7.
20
2. Rotate the VOLT control fully counter-
clockwise. The lamp should not be lit. 10
8
3. Rotate the VOLT control fully clockwise. The 6
5
lamp should be lit. 4
3
4. Rotate the VOLT control counterclockwise 2
until the lamp turns off.
1
70 80 90 100 110 120 130 140 150
D2717-06 135 ±5
Field Voltage (dc)

Figure 2. Typical Inverse Time Characteristic Curve

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 Figure 3. APR 63-5 Mounting Dimensions and Controls Illustration

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 A A

GEN B GEN B

C C

FIELD
FIELD 2 2

ISOLATION
2 TRANSFORMER
2

3 4
E1
SHUTDOWN
SWITCH SHUTDOWN
SWITCH

EXTERNAL
EXTERNAL VOLTAGE
VOLTAGE ADJUST
ADJUST
1 TO CBS 305
TO CBS 305 (OPTIONAL)
1 CW
(OPTIONAL) 4
CW
4 3
3
60 50
COM CB- CB+ F- F+ 4 6 7 3 240 480
HZ HZ
60 50
COM CB- CB+ F- F+ 4 6 7 3 240 480 D2717-11
HZ HZ APR 63-5 VOLTAGE REGULATOR
D2717-09
APR 63-5 VOLTAGE REGULATOR
1 Jumper for 60 Hz or 50 Hz. 3 Remove jumper if CBS 305
is used.
1 Jumper for 60 Hz or 50 Hz. 3 Remove jumper if CBS 305 2 Use 5 A, 250 V, fast-blowing,
is used. high-interrupting capacity 4 If external voltage adjust is not
2 Use 5 A, 250 V, fast-blowing, fuses. used, jumper terminals 6 and 7.
high-interrupting capacity 4 If external voltage adjust is not
fuses. used, jumper terminals 6 and 7. Figure 6. Typical Connections with
Isolation Transformer
Figure 4. Typical Single-Phase Connections

240 Vac
100W
A Lamp
480V B
GEN
C
FIELD
N 10 ohms
10W

2 2

60 50
COM CB- CB+ F- F+ 4 6 7 3 240 480
HZ HZ
SHUTDOWN
SWITCH D2717-12
APR 63-5 VOLTAGE REGULATOR

Figure 7. Operational Test Connections

EXTERNAL
VOLTAGE
ADJUST

1 TO CBS 305
(OPTIONAL)
CW
4
3

60 50
COM CB- CB+ F- F+ 4 6 7 3 240 480
HZ HZ

D2717-10
APR 63-5 VOLTAGE REGULATOR

1 Jumper for 60 Hz or 50 Hz. 3 Remove jumper if CBS 305

is used.
2 Use 5 A, 250 V, fast-blowing,
high-interrupting capacity 4 If external voltage adjust is not
fuses. used, jumper terminals 6 and 7.

Figure 5. Typical Connections for 480 Vac

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