Power-Tronics XC14 User manual

© 2019 Power-Tronics, Inc.
The Power-Tronics XC14 and XC15 voltage
regulators are a self-contained, highly integrated,
heavy-duty voltage regulator designed for
demanding applications and extremely flexible
installations. Continuous output is rated at
32/63VDC @ 12ADC with forcing output up to
52/105VDC @ 20ADC!
The modern generator service technician is often
presented with a variety of generator applications,
all of which require different voltage regulators,
features, or buildup considerations. The XC15 is
explicitly designed with the service technician in
mind, packing an impressive collection of features
in a compact and reliable package with simple
installation and setup instructions!
Standard integrated features of the XC14 and
XC15 include onboard fusing, heavy duty rectifier
section, integrated 0-10V at 4-20mA control
interface, built in paralleling provisions, and a
durable voltage regulator. The XC15 adds
integrated battery buildup provisions.
Over 30 years of design refinement makes the
XC14 and XC15 a durable design, utilizing high-
reliability components and a simple layout. Our
products are designed to provide a lifetime of
service and is specifically built to minimize
failures and potential downtime!
The XC14 and XC15 are capable of parallel
operation with other generators or with a utility
buss. The integrated 0-10VDC or 4-20mA
interface allows a wide variety of VAR, PF, or
other PLC controls to remotely control the unit for
extreme accuracy and unattended installations.
A heavy duty rectifier section, oversized heatsink
and flexible hookup design makes the XC14 and
XC15 an ideal aftermarket replacement AVR for
applications such as Caterpillar, EM, GE,
Generac, Mecc-Alte, Marelli, Shindaiwa, MQ,
Kubota, Onan Magnaciters, Leroy-Somer, SDMO,
and many others!
XC14 / XC15
Commercial Series
Automatic Voltage Regulator
Specifications
Input/Sensing Voltage: 120 - 240vac
Frequency: 50 or 60 Hz
Voltage Regulation: ± .5% From NL to FL
Parallel Operation Yes
Continuous Rated Output Voltage: 32vdc @ 120vac input
63vdc @ 240vac input
Maximum Forcing Output Voltage 52vdc @ 120vac input
105vdc @ 240vac input
Rated Continuous Output Amps: 12adc
Minimum Field Resistance: 2.5Ω@ 120vac input
5Ω@ 240vac input
Min Residual Build up Voltage: 3.5vac
Internal Auto Battery Flash (XC15 only): 12/24vdc
Under Frequency Protection: Yes, VPH reduction
Physical Size: 7.25 x 4.75 x 3.5 in.
Weight: 1.5 lb.
Internal Protection: Fuses, cartridge type
Fuse Type: Main: 3AG 20A @ 250V
Flash: GDB 5A @ 250V
External Voltage Adjustment: Yes
System Operating Indicator: Yes
Integrated 0-10VDC / 4-20mA Interface: Yes

© 2019 Power-Tronics, Inc.
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Table of Contents
Introduction and Functional Description:....................................................................3
Determining Application Sizing:...................................................................................4
Common 12-Lead Generator Terminal Diagrams:.......................................................6
“ISO Standard” 12-Lead Generator Terminal Diagrams:............................................7
120V Input Power & Field Connection Diagram:.........................................................8
240V Input Power & Field Connection Diagram:.........................................................9
Current Transformer Wiring Diagram (Paralleled Generators):...............................10
Fully Automatic Remote Adjustment Wiring Diagram:.............................................11
Automatic / Manual Selectable Remote Adjustment Wiring Diagram:....................12
Integrated Battery Flash Wiring Diagram (XC15 only):.............................................13
Initial Setup and Commissioning:...............................................................................14
Application Troubleshooting:......................................................................................15
Bench Check Procedures:...........................................................................................16
Installation Warranty Form:.........................................................................................17
Product Warranty Certificate:......................................................................................18

© 2019 Power-Tronics, Inc.
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Introduction and Functional Description
Caution: Read This Installation
Manual Carefully and Entirely!
Warning: Do not use digital equipment to read voltage, Hz, or amperage
during this installation. Use only Analog sensing equipment! Failure to do so
may result in damage to equipment or in personal injury!
ALWAYS perform all setup procedures off-line
ALWAYS wear eye protection
ALWAYS strip wire insulation properly or use insulated connectors
ALWAYS use analog metering equipment when setting up the regulator
ALWAYS ensure the voltage regulator receives ample airflow
ALWAYS use adequate fusing
NEVER hold the voltage regulator in your hand or lap when energized
NEVER install the voltage regulator in a place it can be exposed to the elements or
moisture
NEVER mount the voltage regulator over a screw, bolt, rivet, seam, or other fastener
NEVER touch any exposed part of the XC14/XC15 during operation
NEVER install a switch in the DC portion of the voltage regulator’s wiring
NEVER USE A DIGITAL FREQUENCY METER (It can give a false reading!)
Functional Description
The XC14 and XC15 Voltage regulators are the result of over 30 years of engineering efforts and offers
high-demand features at a competitive price point. The XC14/XC15 is a time and field-proven design,
based upon the Power-Tronics XR8 and SEM250A, and is engineered to greatly simplify setup while
offering extreme reliability. When properly installed, the XC14 and XC15 Voltage regulators are designed
to provide a lifetime of service.
A Generator voltage regulator has several automated tasks it must perform in order to provide reliable,
clean, and regulated electricity. It must build-up the generator, regulate the terminal voltage within its
design specifications, and protect both itself and the generator should a fault situation arise.
The XC14 Voltage regulator is designed to replace older obsolete voltage regulators or rotating exciters
with a minimum of connections and a minimum of required installation space. It contains internal field-
replaceable fusing and internal DC field noise suppression. The XC15 adds an internal battery flashing
circuit for guaranteed buildup on generators with low residual voltage.
Due to its extreme simplicity, the XC14 and XC15 Voltage regulators are uncommonly reliable and offer
features and regulation accuracy usually only offered by much more complicated and often much more
expensive voltage regulators.

© 2019 Power-Tronics, Inc.
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Determining Correct Application Sizing
The XC14/XC15 Voltage regulator is designed for use with 120-240VAC input. It contains
internal suppression for use with brush-type generator sets. Before installation, it is necessary
to verify that the XC14/XC15 is the correct product for your application.
To determine if the XC14/XC15 is the correct product for your generator you need to know any
two of the following 3 specifications from the rating plate of your generator:
1: Exciter Field Voltage (in DC Volts) [Generally given in full load Voltage on nameplates]
2: Exciter Field Resistance (in Ohms) [See Note Below]
3: Exciter Field Amperage (in DC Amps) [Generally given in full load Amps on nameplates]
Using the specifications obtained from your generator exciter, verify
that your generator fits the specifications below:
•Exciter Field Resistance ≥2.5Ω& Exciter Full-Load Voltage ≤32VDC
Use 120V Connection (See Page 8)
•Exciter Field Resistance ≥5Ω& Exciter Full-Load Voltage ≤63VDC
Use 240V Connection (See Page 10)
WARNING: BRUSH AND SLIP RING CONNECTION PROBLEMS ARE
THE #1 SOURCE OF VOLTAGE CONTROL PROBLEMS AND FAILURE OF
VOLTAGE REGULATORS!!! DO NOT INSTALL THE XC14/XC15 IF THE BRUSHES
AND/OR SLIP RINGS ARE NOT IN EXCELLENT CONDITION!!!
STOP AND CORRECT BRUSH AND SLIP RING CONNECTION PROBLEMS IF ANY
OF THE FOLLOWING CONDITIONS ARE PRESENT:
•GROOVES IN SLIP RINGS
•ROUGH SLIP RING APPEARANCE OR GHOSTING (CHATTERING)
•OIL CONTAMINATION ON BRUSHES OR SLIP RINGS
•DULL, ROUGH, STRIPED, PITTED, OR METALLIC APPEARANCE OF BRUSH
FACES
•FIELD RESISTANCE MEASURED BETWEEN SLIP RING BRASS AND FIELD
RESISTANCE MEASURED BETWEEN FIELD LEADS EXCEEDS 1-2% DIFFERENCE

© 2019 Power-Tronics, Inc.
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Note about Field Resistance:
• When measuring field resistance on a brushless generator, simply measure the resistance of the
exciter field through your field leads with a multimeter.
• When measuring field resistance on a brush-type generator, measure the resistance through both
the field leads as well as directly on the slip rings themselves. The readings you obtain should
ideally be the same, but no more than 1% difference. If you show more than 1% difference in
reading your generator has brush and ring contact problems and will need cleaning or
maintenance before installing the XC14/XC15. Failure to correct brush and ring contact
problems will result in severe damage to the voltage regulator as well as possible
PERMANENT damage to the slip rings themselves! NEVER use emery cloth, carborundum
stones, “comm sticks”, or Tuner cleaner to dress or clean slip rings. They will make a bad
problem much, much worse! Only use Garnet or Flint sandpaper and clean with a clean rag
soaked with Acetone for best results!
If you do not have any of the specifications of your generator’s exciter, or if you
don’t know where to start when trying to determine your exciter specs, please see
the section below for instructions on measuring and calculating your exciter
specifications.
• Measure your exciter field resistance using a multimeter on your field leads.
Record this value. If you have a brush-type generator, also take a resistance
reading on your slip rings: the value you obtain on the slip rings should be no
more than 1% difference from the value you obtained through the field leads.
• Next, start and run the generator and apply 12V from a battery through your
field leads and record the AC voltage produced by the generator. To
determine your full load exciter field voltage, use the following formula:
EExc. =
Where EGen.Conf.is your Generator’s configured voltage (e.g.: 120, 208, 240,
480V, etc.), EGen.Output is your recorded output voltage, and EBattery is your battery
voltage (12V usually).
• Next, calculate your maximum exciter field amperage using your measured
field resistance and your calculated exciter voltage using the following formula:
Where Iis your maximum exciter field current, Eis your calculated field
voltage from the above formula, and Ris your measured field resistance.
Using the values you just measured and calculated, see the
specifications on the previous page to determine whether the
XC14/XC15 is the correct product for your application.
€
EGen.Conf .
EGen.Output
EBattery
"
#
$
$
%
&
'
'
* 2
I=E
R

© 2019 Power-Tronics, Inc.
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Common 12-Lead Generator Wiring Diagrams
Series Wye (416/480V 3ø)
Voltage L-L: 416/480V
Voltage L-N: 240/277V
Voltage CT – N: 120/139V
Parallel Wye (208/240V 3ø)
Voltage L-L: 208/240V
Voltage L-N: 120/139V
NOTE: 208V is Standard Voltage
Series Delta (240V 3ø)
Voltage L-L: 240V
Voltage L1/L2-N: 120V
Voltage L3 – N: 208V
NOTE: L3-N is a “High Leg”
208V instead of 120V!
Double-Delta (120/240V 1ø)
Voltage L-L: 240V
Voltage L-N: 120V
Preferred Single-Phase Connection.
Don’t Use Zig-Zag if Possible.
NOTE: Derate generator by 1/3 rated
capacity when using this connection!

© 2019 Power-Tronics, Inc.
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“ISO Standard” 12-Lead Generator Wiring Diagrams
Series Wye (416/480V 3ø)
Voltage U-W: 416/480V
Voltage U-N: 240/277V
Voltage CT – N: 120/139V
Parallel Wye (208/240V 3ø)
Voltage U-W: 208/240V
Voltage U-N: 120/139V
NOTE: 208V is Standard Voltage
Series Delta (240V 3ø)
Voltage U-W: 240V
Voltage U/W-N: 120V
Voltage V – N: 208V
NOTE: V-N is a “High Leg”
208V instead of 120V!
Double-Delta (120/240V 1ø)
Voltage U-W: 240V
Voltage U/W-N: 120V
Preferred Single-Phase Connection.
Don’t Use Zig-Zag if Possible.
NOTE: Derate generator by 1/3 rated
capacity when using this connection!

© 2019 Power-Tronics, Inc.
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120V Input Power & Field Connection Diagram
(See pages 10-12 for control wiring information)
The XC14/XC15 is a Half-Wave rectified voltage regulator, which allows a maximum of
52VDC at 20 ADC with an input voltage of 120VAC.
This connection is typically used on generators with full load field voltages of 32VDC or
less and full load exciter field amperage less than 12ADC.
Note that the maximum input voltage to the XC14/XC15 Voltage regulator in this
connection is 139VAC! DO NOT input 208-240VAC into the XC14/XC15 in this
connection! Regulation problems or damage to the unit may result! For use on 480V
systems, use a 480-120V step-down transformer rated at 1KVA or connect the
regulator to the winding center taps T7 and T0 (See Pages 6 and 7).
Using a transformer to connect the input of the XC14/XC15 to 2 different phases of the
generator will result in greater regulation accuracy than when connecting line-neutral.
Diagram Assumes a 208-240V Generator
For 480V Generators, use a 1KVA (or
larger) Transformer with a 120V
Secondary OR Connect to the Generator
winding center taps at T7 and T0.
NEVER install a switch or
breaker on the DC or Exciter
side of the voltage regulator!
Only install a switch or
disconnect on the AC Side of
the regulator!
See Page 10 for
Paralleling Wire
Diagram
100KΩ@ 2w
NOTE:
It is not necessary
to jumper terminals
R1 and R2 if not
using the Remote
Voltage Adjustment!
NOTE:
Jumper
X & Y if
generator
is not
paralleled!
NOTE:
Use switch rated:
20A @ 250VAC
See Pages 11-12
for External
Control Wiring
Diagrams
See Page 13 for
Battery Flash
Wiring Diagram
XC15 Only

© 2019 Power-Tronics, Inc.
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240V Input Power & Field Connection Diagram
(See pages 10-12 for control wiring information)
The XC14/XC15 is a Half-Wave rectified voltage regulator, which allows a maximum of
105VDC at 20 ADC with an input voltage of 240VAC.
This connection is typically used on generators with full load field voltages of 63VDC or
less and full load exciter field amperage less than 12ADC.
Note that the maximum input voltage to the XC14/XC15 Voltage regulator in this
connection is 240VAC! DO NOT input 277VAC into the XC14/XC15 in this
connection! Regulation problems or damage to the unit may result! For use on 480V
systems, use a 480-240V step-down transformer rated at 1.5KVA or connect the
regulator to the winding center taps T7 and T9 (See Pages 6 and 7).
Connecting the input of the XC14/XC15 to 2 different phases of the generator will result
in greater regulation accuracy than when connecting line-neutral.
Diagram Assumes a 208-240V Generator
For 480V Generators, use a 1.5KVA (or
larger) Transformer with a 240V
Secondary OR Connect to the Generator
winding center taps at T7 and T9.
NEVER install a switch or
breaker on the DC or Exciter
side of the voltage regulator!
Only install a switch or
disconnect on the AC Side of
the regulator!
See Page 10 for
Paralleling Wire
Diagram
100KΩ@ 2w
NOTE:
It is not necessary
to jumper terminals
R1 and R2 if not
using the Remote
Voltage Adjustment!
NOTE:
Jumper
X & Y if
generator
is not
paralleled!
NOTE:
Use switch rated:
20A @ 250VAC
See Pages 11-12
for External
Control Wiring
Diagrams
See Page 13 for
Battery Flash
Wiring Diagram
XC15 Only

© 2019 Power-Tronics, Inc.
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Current Transformer Wiring Diagram
For Paralleled Generators
To use the XC14/XC15 Voltage regulator in a parallel configuration either with another
generator or with a buss such as a utility, use the diagram below for proper hookup with
the XC14/XC15. Power and field wiring is shown on Pages 8 and 9.
This diagram assumes a paralleled operating environment
with manual remote adjustment.
NOTE: Power-Tronics products parallel using the Reactive Droop compensation method. This allows
our products to parallel with existing systems easily while also allowing islanded operation with the flip of
a switch. When initially installing the droop resistor, set it for approximately 7Ωbefore final
adjustment later. If the droop is excessive when load testing, reduce the resistance a bit at a time until
satisfactory droop is achieved. CT should be sized at 25-35VA capacity!
xxx/5a CT
25-35VA
Unit/Parallel
Switch
Reactive Droop
Adjustment
10Ω, 100W
If using the
internal 0-10VDC
Interface module,
See Pages 11-12
for Control Wiring
Diagrams
NOTE:
Don’t Omit Remote
Adjustment on a
Paralleled Generator!!!
100KΩ@ 2w

© 2019 Power-Tronics, Inc.
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Fully Automatic Remote Adjustment Wiring Diagram
This wiring diagram shows ONLY the control wiring configuration for fully-automatic
Remote Control of the XC14/XC15. Power wiring is shown on Pages 8 and 9.
+
-
0-10VDC
or
4-20mA
Control Signal
NOTE:
Colored Wires are for
ease of identification in
this drawing only, they
are not required

© 2019 Power-Tronics, Inc.
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Automatic / Manual Selectable Remote Adjustment
Wiring Diagram
This wiring diagram shows ONLY the control wiring configuration for fully-automatic
Remote Control of the XC14/XC15. Power wiring is shown on Pages 8 and 9.
+
-
0-10VDC
or
4-20mA
Control Signal
NOTE:
Colored Wires are for
ease of identification in
this drawing only, they
are not required
100KΩ@ 2w
DPDT Switch
or Relay
Switch Position:
Automatic !
Manual "

© 2019 Power-Tronics, Inc.
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Integrated Battery Flash Wiring Diagram
XC15 Models Only
The diagram below shows how to wire the integrated battery flash circuit on XC15.
This diagram is only for the battery connection to the XC15 to enable Battery Flashing.
Power and Control wiring diagrams are shown on Pages 8-12
The XC15 contains a solid-state buildup circuit for traditional residual-
voltage buildup from 3.5VAC at terminals AC1 and AC2.
Connecting the battery flash is not required if sufficient residual
voltage is present, the regulator will build itself up!
NOTE:
Connect to 12 or 24
terminal based on
12V or 24V battery
voltage
NOTE:
Pushbutton,
Momentary Toggle
Switch, Relay
Contact, or Oil
Pressure Switch.
Do Not Omit
Switch!

© 2019 Power-Tronics, Inc.
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Initial Setup and Commissioning
1. Install the XC14/XC15 and wire according to the correct wiring diagram and control
wiring diagram (Pages 8-13).Make sure the unit is mounted where it can receive
fresh air. Air circulation by natural convection or forced ventilation is crucial for a long
service life!
2. If installing the XC14/XC15 on a brush-type generator, verify that the brushes and brush
riggings are isolated, ungrounded, and connected ONLY to the XC14/XC15.Remove
any ground straps from the brush holders, if present.
3. If operating on a 50Hz generator, remove the 50/60Hz Selection Jumper (next to voltage
adjustment potentiometer).
4. Turn the internal voltage control (blue potentiometer) 15 or more turns counter clockwise
(left) or until you hear the screw click. This procedure is necessary in case the original
factory settings have been altered.
5. If you are using a remote voltage adjustment, set it at 50% of adjustment.
6. If the generator is to be paralleled, set the droop resistor between 6Ωand 10Ω.
7. Start up the prime mover and bring up to operating speed and turn on the regulator
switch (if used) and the battery flash switch (if used).
8. Set the internal voltage adjustment to the desired voltage setting for the generator output
by turning the adjustment screw clockwise (right).
Note that the voltage adjustment is a 25-turn pot!
9. Place the generator on line and observe the frequency and voltage.
10. If the generator is being paralleled, measure the droop during loading and adjust the
droop resistor as necessary. Reducing droop resistor resistance will reduce droop.
NOTE: Loading the generator with a purely resistive load-bank may cause
undesirable droop characteristics such as no droop, very slight droop, or even
rising terminal voltage. Measure droop with a mixed load for best results.
11. If paralleling and the terminal voltage rises or excessive amperage exportation occurs
during loading with a mixed load connected, reverse the CT leads and try again.
12. If using the internal 0-10VDC interface module, manually vary the input voltage signal to
observe the behavior of the exciter in response to a control voltage change. By default
the unit ships factory preset for full range from 0-10VDC (Effective range +/-25VAC from
240VAC setpoint).
NOTE: If your external control device uses a +/-9V or +/-10V control signal, you can still
use it with the internal interface module by manually setting a +5V offset in your control
scheme. The unit will recognize 0-10V control signals and will ignore any negative
control signals.
14. Observe voltage regulation during no-load and full-load conditions. Once the voltage is
set and regulating characteristics are satisfactory the installation procedure is complete.

© 2019 Power-Tronics, Inc.
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Application Troubleshooting
Problem: Possible Cause
No Voltage 1 3 5 7 9 11 13 15 20 21
Pulsating Voltage 4 5 6 12 16
Flickering Voltage 4 6 7 14 21 22
High Voltage 6 7 8 9 12 13 17 18 20 21 22
Voltage Drop on Load 5 8 10 12 16 23 24
Low Voltage 5 8 12 13
Poor Voltage Regulation 2 4 10 12 13 16 23 24
No Voltage Control 13 19 20 21 22 23 24
Possible Causes:
1. Residual input voltage to the exciter is below 3.5vac, main or battery fuses blown, dead battery.
2. Unbalanced generator load.
3. Open exciter field or defective generator.
4. Non-linear load or defective connection in exciter field.
5. Open diode in exciter or shorted rotor in generator.
6. Loose component in voltage regulator.
7. Loose wiring connections.
8. Input voltage to regulator is too low.
9. Exciter field is grounded.
10. Non-linear load or wrong selection for regulator hookup.
11. Exciter fields are reversed.
12. Wrong selection of regulator wiring configuration.
13. Defective voltage regulator.
14. SCR or Inverter drive effecting generator waveform.
15. Regulator needs battery flashing circuit.
16. Isolation transformer is too small.
17. Isolation transformer is needed.
18. Exciter fields are not isolated from other circuits.
19. Input and field circuit are being fed by a common cable or conduit.
20. Incorrect hookup or wiring.
21. Poor brush contact to commutator or sliprings.
22. Damaged, pitted, or grooved slip ring surface.
23. Current transformer has reversed polarity or is not shorted during non-parallel operation.
24. Input to regulator is from an auxiliary winding and not the generator main stator.

© 2019 Power-Tronics, Inc.
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Bench Check Procedures
1. Wire up the XC14/XC15 as shown in the figure below.
2. Connect up one 120 volt 50 to 150 watt incandescent light bulb to the F+ and F- Terminals.
3. Install a temporary jumper wire between terminals X and Y.
4. Turn the internal voltage adjustment (blue potentiometer) fully Counter-Clockwise (Left) before
beginning the testing procedures below.
5. XC15 Models Only: Close the battery switch (or connect the battery leads). After roughly 1
second the test light should be ON Dimly.
6. Input 120-240VAC fused at no more than 5A into the XC14/XC15. The test light should turn OFF.
7. Slowly turn the internal voltage adjustment Clockwise (Right) until the light glows. The test light
should light to HALF Brightness.NOTE: It may take several turns of the adjustment screw
before the lights illuminate!
8. Slowly turn the internal voltage adjustment Counter-Clockwise (Left) until the lights go dark. The test
light should be OFF.NOTE: It may take several turns of the adjustment screw before the
lights go dark!
9. Turn off AC power and disconnect the XC14/XC15 from your AC power source. XC15 Models Only:
After roughly 1 second the test light should be ON Dimly.
10. XC15 Models Only: Open the battery switch (or disconnect the battery leads). The test light
should be OFF.
11. If you were able to successfully perform all of these tests, the XC14/XC15 is good.
120V 50-150W
Incandescent
Fuse Replacement Information:
Battery Flash (XC15 Only):
Rating: 5A @ 250VAC
Qty: 2
PTI Part # 5R3-403
Cooper–Bussman Part # BK/GDB-5A
XC14/XC15 Main:
Rating: 20A @ 250VAC
Qty: 1
PTI Part # 5R3-628
Littelfuse Part # 0314020.MXP
Jumper
NOTE:
Connect to 12 or 24
terminal based on
12V or 24V battery
voltage
XC15 Only!
120-240VAC
Fused @ 5A

© 2019 Power-Tronics, Inc.
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Installation Warranty Form
It is very important that you fill out this form completely when installing a voltage regulator.
This form serves as a history record on the application. This form also contains the
information needed by Power-Tronics, Inc., for repair and troubleshooting of any product you
may be having problems with.
Failure to fill out this form during installation will result in a cancellation of your
warranty coverage! Filling out this form takes only minutes but will save hours or days
later on if your product should require service!
Problem Description/History (Please be detailed!!!):
Ship-To Address (City, State, Zip, Country):
Company Name:
Contact Person:
Telephone Number:
Email Address:
Primary Load (Please Explain):
Repair/Warranty Request Information
Generator Leads (Check One:) ☐12 ☐10 ☐6 ☐4 (3ø) ☐4 (1ø) ☐3
Generator Wiring Mode (Check One:) ☐High-Wye ☐Low-Wye ☐Series Delta
☐Zig-Zag ☐Double-Delta ☐Single-Phase ☐Other
Terminal Voltage:
Residual AC Voltage:
Rated KW:
Rated KVA:
Generator Wiring/Usage Information
This Section for Brushless Generators Only
Exciter Field Voltage:
Exciter Field Resistance:
This Section for Brush-Type Generators Only
Shunt-Field Voltage:
Shunt-Field Resistance:
Rotor Resistance @ Brush Leads:
Rotor Resistance on Slip-Rings:
Rotor Excitation Voltage:
Product Model:
Serial #:
Date of Installation:
Additional Module(s) or Options:

© 2019 Power-Tronics, Inc.
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PRODUCT WARRANTY
Power-Tronics, Inc., assumes no liability for damages due to incorrect voltage or other voltage
related damages resulting from either output of the generator or input to the generator exciter
system. These problems should be protected with external devices provided by the customer
such as fuses, surge suppressors, over/under voltage and frequency controls.
Power-Tronics, Inc., warranties only parts and workmanship of this product for a period of 1
year from the original date of purchase from Power-Tronics, Inc. Under warranty, Power-
Tronics, Inc. will replace, exchange or repair the defective product without labor or parts cost
to the customer. Remaining warranty of the original product will be transferred to the replaced
or repaired product. To obtain warranty, a copy of the original Installation Warranty Form must
be sent in with the defective product, which clearly shows the purchase date and serial number
of the defective part. A repair request form must be sent in with the product before repairs will
begin. You can obtain this form by contacting Power-Tronics, Inc.
Send repairs to: Power-Tronics, Inc., 2802 Cobbler Ln., Kerrville Texas USA 78028.
Send in repairs only by UPS or FedEx. USPS will NOT deliver to our facility!
Any one of the following conditions will void the warranty:
#Overheating of the power supply resistor on the printed circuit card.
#Overheating of the SCR or freewheeling diode.
#Physical damage to the printed circuit card, housing or components.
#Unauthorized repair or alteration of printed circuit card.
#Installation by anyone other than a qualified professional generator service technician.
#Conductive or corrosive contamination of the circuit card.
#Removal of our company identification from the product.
#Removal of any conformal coating of the printed circuit card or components.
#Overheating of foil on the printed circuit card.
#Inappropriate or infeasible application.
#Use with any external device other than manufactured by Power-Tronics, Inc.
#Failure to fill out the attached warranty card during installation
No other warranty is expressed or implied.