Basler Electric APR63-5 User Manual

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+1 618.654.2341 (USA)

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Model

APR 63-5

9168700107

INTRODUCTION

By supplying and controlling the dc exciter field power,
the APR 63-5 regulates the output voltage of a
conventional, 50 or 60 hertz, brushless generator that
has a 63 Vdc field. APR 63-5 voltage regulators are
CSA/UL recognized and housed in a rugged, epoxy­potted, plastic case.

The APR 63-5 senses the generator output voltage,
converts it to a dc signal, and compares this signal to
a reference voltage. An error signal is developed and
used to control the dc field power in order to maintain
a constant generator output.

SPECIFICATIONS
Power Input

Range: 190 to 277 Vac, ±10%,

1-phase
Frequency: 50/60 Hz
Burden: 650 VA

Sensing Input

Configuration: 1-phase, tap-selectable
Frequency: 50/60 Hz
Range
240 V Tap: 190 to 250 Vac, ±10%
480 V Tap: 380 to 480 Vac, ±10%
Burden: 5 VA maximum

Power Output

Ratings

Maximum Continuous: 5.0 Adc, 63 Vdc, 315 W
One Minute Forcing: 8.5 Adc, 105 Vdc, 893 W

DC Field Resistance

Minimum: 12.6 Ω
Maximum: 100 Ω

Voltage Adjustment

Internal Control

Range
240 V Tap: 170 to 264 Vac
480 V Tap: 340 to 528 Vac

External Control

Provided by an optional, 1,000 Ω, 2 W potentiometer
(Basler P/N 17727).

Voltage Buildup

Buildup is automatic from generator residual voltage
as low as 6 Vac.

Publication

9168700991

Revision

G

Instructions

Part Number

Frequency Compensation

See Figure 1.

Overexcitation Shutdown

Output power is removed instantaneously if the field
voltage exceeds 135 Vdc, ±5 Vdc. Output power is
removed after a time delay that is inversely propor ­tional to the voltage magnitude when the field voltage
exceeds 100 Vdc, ±5 Vdc.

Agency Certifications

UL recognized and CSA certified.

Temperature

Operating: –40 to 60°C (–40 to 140°F)
Storage: –65 to 85°C (–85 to 185°F)

OVEREXCITATION SHUTDOWN PROTECT IO N

If the exciter field voltage exceeds 100 Vdc (±5 Vdc),
the APR 63-5 automatically removes field power after
a time delay. This delay is inversely proportional to the
magnitude of the overvoltage. Figure 2 illustrates the
inverse time characteristic. At 135 Vdc (±5 Vdc), field
power is removed instantaneously.

When field power is removed due to overexcitation,
the APR 63-5 will not reset or return to operation until
the generator output decreases to less than 6 Vac for
a minimum of 10 seconds.

REGULATOR CONTROLS

APR 63-5 controls are illustrated in Figure 3 and
consist of FREQ, STAB, and VOLT.

FREQ

This control prevents generator and regulator damage
when the generator frequency decreases by
decreasing the generator output voltage. To adjust the
FREQ control:

1. Set the generator rpm at the desired

frequency roll-off.

2. Adjust the FREQ control until the voltage

begins to decrease.

3. Increase the generator speed to nominal. The

output voltage should be at nominal.

STAB

This control enables adjustment of the generator
response time (and thus voltage stability). Use an
oscilloscope or other voltage recording device to set

Date

04/14

Copyright

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

Caution

adjusting the STAB control.

blowing fuses. If desired, install a shutdown
switch.

• Counterclockwise rotation of the STAB control

reduces the voltage response time. If rotated
too far, the generator voltage will hunt
(oscillate).

• Rotate the STAB control clockwise, just past

the point where voltage oscillation occurs.

VOLT

Observe the following guidelines when adjusting the
VOLT control.

• Clockwise rotation of the VOLT control

increases the generator output voltage.

• Replacing the jumper across terminals 6 and

7 with an external potentiometer (1,000 Ω,
2 W) gives a ±10% voltage adjustment range
with the nominal value set by the VOLT
control.

ACCESSORY EQUI P ME NT

The following equipment is available as options to the
APR 63-5:

• BE18674001 power isolation transformer

• APM 2000 and CT for parallel compensation

• MVC 300 for manual voltage control

• CBS 305 Current Boost System

5. Connect the line-to-line generator sensing to

the regulator. Generator sensing connects to
terminals 4 and either 240 or 480, depending
upon the generator voltage.

OPERATION

The following procedures are provided for APR 63-5
setup and commissioning.

Meggers and high-potential test equipment
must not be used. Incorrect use of such
equipment could damage the semiconductors
contained in the regulator.

Preliminary Setu p

To prevent damage to the regulator, perform the
following steps before proceeding with system startup.

1. Verify that the APR 63-5’s specifications re

compatible with the generator system
requirements.

2. Ensure that the regulator is connected

correctly. See Figures, 4, 5, and 6.

MOUNTING

The APR 63-5 can be mounted in any convenient
position and may be mounted directly on the
generator set. Figure 3 illustrates the mounting
dimensions. Use #11 (ANSI) or M5 (metric) mounting
hardware.

INTERCONNECTION

Connect the APR 63-5 by performing the following
steps. Figure 4, Figure 5, and Figure 6 illustrate
typical APR63-5 connections. The torque applied to
the terminal block screws should not exceed 9 inch
pounds (1 Newton meter).

1. Configure the regulator’s nominal frequency

by connecting the jumper from COM to either
the 50 Hz or 60 Hz terminal.

2. If using a CBS 305 with the APR 63/5, remove

the jumper from APR 63-5 terminals CB– and
CB+ and connect those terminals to the CBS

305.

3. Connect APR 63-5 terminals F+ and F– to the

exciter field. Observe proper polarity.

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-

3. Install fuses per step 4 of Interconnection.

During periods of prime mover idling, use the
excitation shutdown switch.

SYSTEM STARTUP

1. Start the prime mover and br ing it up to rated

speed. The generator voltage should build up.
If a minimum residual generator voltage of 6
Vac is not present, perform the procedure
under Field Flashing.

2. Slowly adjust the regulator VOLT control until

the voltage reaches the nominal value. If
used, adjust the remote voltage adjust
potentiometer to set the generator output to
the desired value.

3. Apply and remove load to check for stability. If

the voltage is unstable, refer to the guidelines
under Regulator Controls, STAB.

4. Reduce the generator frequency (speed) to 55

Hz (on 60 Hz systems) or 45 Hz (on 50 Hz
systems). Verify that the generator output
decreases from this point. If it does not, refer
to the steps under Regulator Controls, FREQ.

Publication

9168700991

Revision

G

Instructions

Date

04/14

Page

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