Northern Lights PX-300K1 Series A.C. Generator Programming manual

PX-300K1 SERIESA.C. GENERATORS
For Generator Models:
PX-308K1,PX309K1, PX-310K1,PX-312K1, PX-316K1,
PX-320K1, PX-325K1, and PX-332K1
OPERATOR’S
& PARTS
MANUAL
OPERATOR’S
& PARTS
MANUAL

Northern Lights
4420 14th Avenue N.W.
Seattle, WA 98107
Tel: [phone]
Fax: [phone]
Copyright ©2009 Northern Lights, Inc.
All rights reserved. Northern Lights™, and
the Northern Lights logo are trademarks of
Northern Lights, Inc.
Printed in U.S.A.
PART NO.: OPX300K1 09/09
Diesel engine exhaust and some of its constitu-
ents are known to the State of California to cause
cancer, birth defects, and other reproductive harm.
— CALIFORNIA—
Proposition 65 Warning:

OPERATOR’S &
PARTS MANUAL
PX-300K1 SERIES A.C. GENERATORS
For Generator Models:
PX-308K1, PX-309K1, PX-310K1, PX-312K1,
PX-316K1, PX-320K1, PX-325K1, and PX-332K1
Read this manual thoroughly before starting your equipment.
This manual contains information needed to operate your set correctly and safely.
Introduction......................................................................2
Safety Rules.....................................................................2
Models and Serial Numbers ...........................................3
Mechanical Construction.................................................4
INITIAL INSPECTION AND COUPLING
Initial Inspection..........................................................4
Coupling with Prime Mover........................................4
Grounding ...................................................................4
PERFORMANCE AND FUNCTION
Excitation System........................................................5
Automatic Voltage Regulator (AVR) ..........................5
Under Speed Protection...............................................5
Rotary Rectifier and Surge Suppressor.......................5
CHARACTERISTICS
Voltage Regulation......................................................6
Response .....................................................................6
Voltage Stability..........................................................6
Motor Starting.............................................................6
Short Circuit................................................................6
Phase Rotation.............................................................6
STANDARD VOLTAGE SELECTION TABLE .......6
OPERATION - GENERATOR SET
Starting........................................................................7
Voltage Adjustment.....................................................7
Running.......................................................................7
Stopping ......................................................................7
OPERATION - VOLTAGE REGULATOR
Safety Rules ................................................................8
Operation.....................................................................8
Adjustment..................................................................8
MAINTENANCE
Bearing Inspection ......................................................9
Insulation Resistance Measurement Method ..............9
Rotating Rectifier Assembly ......................................9
Parts Replacement Method .................................9 - 10
Automatic Voltage Regulator Maintenance ..............11
SPECIFICATIONS
Generator Specifications .................................. 12 - 13
Specifications: DST-51-DFK ................................... 14
TROUBLESHOOTING ............................................ 15
PARTS LIST ..................................................... 16 - 27
WIRING DIAGRAM
AVR DST-51-DFK .................................................. 28
Table of Contents
Proprietary Information
This publication is the property of Northern Lights, Inc.
It may not be reproduced in whole or in part without the written permission of Northern Lights, Inc.
© Northern Lights, Inc. 2009. All rights reserved. Litho U.S.A. Publication number OPX300K1 09/09
OPX300K1 09/09
3

OPX300K1 09/09
4
Introduction
This manual describes procedures for operation,
maintenance, inspection and adjustment. It will help the
operator realize peak performance through effective,
economical and safe operation.
• Read this manual carefully BEFORE operating the
generator.
• Study this manual until proper operation becomes
personal habit.
• Operation, inspection, and maintenance should be
carried out carefully. Safety must be given the first
priority.
Safety Rules
• To insure years of trouble-free operation, the
specified maintenance is important and should be
performed.
• Electrical equipment should always be kept
clean. Oil, dust, moisture and salt are all harmful
to generators.
• Be careful with electricity. Do not touch rotating
parts.
• Ambient Environmental Conditions
a) Gas: Donotuseinanenvironmentofcorrosive
or flammable gas (gasoline, hydrogen sulfide,
methane gas, etc.)
b) Sandy Dust: Do not use equipment in places
with excessive sand and dust.
c) Humidity: Do not use in very humid
environments for long periods of time.
d) Salt/Seawater: Protect your generator from
exposure to salt, water, and water vapor.
• Insulation Resistance and Dielectric: When
measuring insulation resistance and dielectric, be
sure to disconnect the AVR and rectifier.
• Besurethattheregulatorisshutoffbyswitchingthe
CPR (circuit breaker) on the AVR to the off position
when the unit is running at less than rated speed, or
whentheunitistoberunbutnopowergenerationis
required.
• Before starting your generator, be sure operating
conditions are safe.
• Ventilation: When selecting the installation site, be
sure that the area is well ventilated and that ambient
temperature does not exceed 40°C. If the
temperaure exceeds 40°C, de-rate the generator
output as per “data sheet” for operation.
• Be sure to provide generator with cover and
protection when operating outside.
PX-300K Series AC generators are based on BS
4999 part 20 and IEC34-5, IP21.

OPX300K1 09/09
5
Model and Serial Numbers
GENERATOR END MODEL NUMBERS
Generator Set Model No.................PXK Generator Model
M and NL753K ............................................PX-308K1
M and NL773L..............................................PX-309K1
M and NL843JK ...........................................PX-310K1
M and NL843NK ..........................................PX-312K1
M844K..........................................................PX-316K1
M844LK .......................................................PX-320K1
M864 ..............................................................PX-325K
M984 ............................................................PX-332K1
SERIAL NUMBERS
• When referencing Northern Lights equipment by serial
number, it is important to differentiate between the engine,
generator end and generator set serial numbers.
• The engine serial number is either on a metal tag or stamped
directly into the engine block.
• The generator END serial number is on a metal tag attached
to the generator end.
• The generator SET serial number is on a separate metal tag
attached to the generator end. It may be a five by one inch tag
installed directly below the generator end tag. Or, it may look
like the illustrations below. Please use the generator SET number
in correspondence or when ordering parts.
Figure 1: Generator Set Serial Number Plate

OPX300K1 09/09
6
Mechanical Construction
STATOR
The stator frame is fabricated from rolled steel. The
round construction provides rigidity and strength to
resist excessive mechanical shocks. The stator core is
made of high quality silicon steel plates coated with
insulating film for prevention of eddy currents. The
core is positioned along the internal surface of the
frame. The exciter field core is made of special steel
plates capable of retaining a high degree of residual
magnetism.
BEARINGS
The long-life ball bearings are sealed to prevent grease
from escaping and to keep dirt out.
ROTOR
The rotor shaft is made of high quality carbon steel,
and is designed and manufactured to be mechanically
durable. The rotor is a salient revolving field type
with the main field core made from special steel plates
having superior magnetic characteristics. The field core
elements, exciter rotor, rotary rectifier and cooling fan
are integral parts of the same shaft.
VENTILATION
Cooling is provided by the cooling fan of the rotor
through suction ports and exhausted through outlet
ports. Every machine conforms to the cooling code
ICO1 of BS.
Initial Inspection and Coupling
INITIAL INSPECTION
If the generator is stored for long periods of time, store
in a clean, dry, ventilated area. After extensive storage
time, check the resistance of the coil insulation in
accordance with this manual (see MAINTENANCE,
page 9) before operation. Be sure there are no abnormal
sounds or any overheating during operation. It is
recommended that standby generators utilize a space
heater (optional) in order to keep the coil insulation in
optimum working condition.
COUPLING BOLT SPECIFICATIONS
The Coupling Bolt Torque for all PX-300K series models
is 32 lbs.ft.
COUPLING WITH PRIME MOVER
PX-300K series single bearing generators make centering
and direct coupling easy. Shim the generator legs as needed
for proper leveling. Coupling bolt size and torque will
vary according to the engine manufacturer. The bolt torque
for attaching the coupling plates to the generator rotor are
shown in COUPLING BOLT SPECIFICATIONS, above.
GROUNDING
The generator frame should be electrically grounded to the
base of the generator set. The neutral is not grounded to
the frame unless specified.

OPX300K1 09/09
7
Performance and Function
EXCITATION SYSTEM
The excitation system of the PX-300K Series genera-
tor uses an Automatic Voltage Regulator (AVR) which
uses a portion of the output power to supply controlled
DC power to the exciter field (EX) as show in Figure 2.
When DC power is supplied to the exciter field, output
from the exciter armature is rectified by a 3-phase bridge
rotary rectifier (Si) and supplied to the main field coils.
See Figure 2.
AUTOMATIC VOLTAGE REGULATOR (AVR)
The PX-300K Series generators use a DST-51 AVR.
This is a compact voltage regulator for generators with
an output up to 50kW. The DST-51 can be used in 120V
single phase applications and is installed inside the gen-
erator junction box.
The DST-51 obtains sensing input from the main stator
coils and compares the rectified value of the sensing volt-
age with the reference voltage produced inside the AVR.
Input power is obtained from the main stator.
Rectified output power to the exciter field is controlled
by switching a transistor on and off. This AVR will
control terminal voltage even if the input sine wave is
distorted.
Figure 2: PX-300K Block Diagram
AVR: Automatic Voltage
Regulator
EX: Exciter
Si: Rotating Rectifier
Figure 4: For 60 Hz
Figure 3: For 50 Hz
UNDER SPEED PROTECTION
A frequency sensing circuit is built into the AVR.
When the generator speed drops to 90% of rated
speed this circuit protects the AVR by reducing
the voltage in proportion to the decrease in engine
speed. In addition, when the generator is hit with a
rapid overload, this circuit will lower the voltage to
protect the engine. See Figures 3 & 4.
ROTARY RECTIFIER AND SURGE
SUPPRESSOR
The rotary rectifier assembly, consisting of six
diodes, functions as a 3-phase full wave rectifier for
the output of the exciter armature and supplies this
to the main field. To protect the diodes from large,
instantaneous voltage surges, surge absorbers are
provided as part of the rotating rectifier assembly.

OPX300K1 09/09
8
Characteristics
VOLTAGE REGULATION
Generator terminal voltage regulation is within ±1% of the
rated voltage in lagging power factor. 1.0 to 0.8, when the
load is varied gradually from no load to full load. This value
includes the temperature drift and rotating variation.
RESPONSE
After supplying a load instantaneously, the generator voltage
should be restored to the steady condition in accordance with
BS4999 Part 40, grade VR2.11 to VR2.23.
VOLTAGE STABILITY
In constant load and engine speed, voltage stability remains
0.25% of the rated voltage.
MOTOR STARTING
The generator is capable of enduring up to 300% of the rated
current for 10 seconds at power factor of 0.
Winding Connection Frequency Voltages
3 Phase Series Star 60 Hz 480/277 460/266 440/254 416/240
(High Wye) 50 Hz 415/240 400/231 380/219
3 Phase Parallel Star 60 Hz 240/139 230/133 220/127 208/120
(Low Wye) 50 Hz 208/120 200/115 190/110
1 Phase 60 Hz 120/240
60 Hz 120
1 Phase 50 Hz 100/200 110/220 115/230 120/240
50 Hz 110
SHORT CIRCUIT
PX-300K Series AC generators can provide over 300% of
the rated current for a short period of time, with an
excitation support system (optional).
PHASE ROTATION
Phase sequence is T1-T2-T3 (U-V-W, A-B-C) with a
counterclockwise rotation of generator viewed from the
anti-coupling side.
Figure 5: Standard Voltage Table
Standard Voltage Tables and Connection Diagrams
Standard voltage selection table and connection diagram for PX-300K Series 1-phase 4-wire and 3-phase 12-wire AC
generators. See Page 24.

OPX300K1 09/09
9
Operation – Generator Set
STARTING
Before starting generator, check the following:
1. Make sure that the wiring is correct.
2. Be sure that nothing is blocking the air inlet/ outlet.
3. Make sure that the inside of the generator is clean.
4. Be sure the main line circuit breaker is switched
OFF.
After checking each of the above, start the genertor in the
following procedure:
1. Start engine in accordance with instructions in the
Operator’s Manual. Be sure there is no abnormal
sound or vibration.
2. The voltage will rise due to the increase in generator
speed.Aftermakingsurethateachinterphasevoltage
isbalanced,setthevoltageandfrequencytotherated
level. Be sure the CPR switch is “ON”. The voltage
will not rise with CPR “OFF”.
3. After running the generator without load, switch the
circuit breaker ON to start the load operation.
VOLTAGE ADJUSTMENT
The generator has been adjusted to obtain optimum
voltage at the factory. If the voltage is different, adjust
the voltage with the Voltage Adjust provided on the
AVR.
RUNNING
Check the following while operating the generator:
1. Abnormal vibration and/or sound
2. Load
3. Environment:
Keep the air inlet/outlet clean and clear for optimum
cooling. Insufficient cooling causes overheating of the
generator.
Note: When a 3-phase generator is used at single phase
load, each phase current should be balanced and should
not exceed 50% of the rated current. In addition,
allowable unbalanced load is listed on the Data Sheet.
STOPPING
After putting the running generator in a no-load condition
by removing the generator load, stop the engine in
accordance with the Engine Manual.

OPX300K1 09/09
10
Operation – Automatic Voltage
Regulator
SAFETY RULES
• Do not leave AVR connected when testing generator
with high-pot or megger.
• Adjust the engine only when the CPR is in “OFF”
position.
OPERATION
1. Make sure the wiring is correct.
2. Make sure the frequency selection switch is set to
the rated frequency (60 or 50 Hz).
3. To adjust the voltage turn the Voltage Adjust
(VR1) counter-clock wise. Make sure the CPR is
“ON”.
a. Start the engine with no load and increase the
engine speed slowly to the rated level.
The voltage will automatically build up (residual
voltage: more than 10V).
b. Adjust to the rated voltage using the Voltage
Adjust (VR1).
c. Make sure of the proper Volt/Frequency
characteristic by reducing the generator speed.
d. Make sure of voltage stability by switching the
load “ON” or “OFF”. Use the Stability Adjust
(VR2).
e. If you find no problem with the AVR, start the
normal operation.
ADJUSTMENT
Each component of the AVR is adjusted at the factory
to obtain optimum voltage. If readjustment is
necessary, make sure the voltage, frequency, load, etc.
are functioning properly after readjustment.
1. Initial Excitation: For initial excitation use a
DC12V or DC24V battery.
a. Stop the generator.
b. Remove the AVR connectors.
c. Connect the field terminal F(+) with the
polarity (+) of battery and the terminal F (-)
with the polarity (-) and excite AVR field for 2
or 3 seconds.
2. Voltage Adjustment:
If the voltage output is low, increase the voltage by
turning the Voltage Adjust (VR1) slowly clockwise.
3. Stability:
If the voltage output is unstable, increase the voltage by
turning the Stability Adjust (VR2) clockwise.
4. Voltage and Frequency:
Voltage and Frequency (Hz) have been preset at the
factory.

OPX300K1 09/09
11
Maintenance
BEARING INSPECTION
For bearing inspection, make sure that there is no
abnormal sound during normal running and no
overheating. Greasing is not necessary for generators
using the double seal type ball bearings, but these will
need to be replaced after every 10,000 hours of operation
(see PARTS REPLACEMENT METHOD).
INSULATION RESISTANCE MEASUREMENT
If the generator has not been used for a long time, check
the insulation resistance of each lead wire at 500V with a
megger.
It is usually enough to check only the stator winding. In
order to prevent damage to the AVR, disconnect it. If the
measured insulation resistance value is above 2 M ohms,
there is no problem, but if it is lower than that, check to
see if the inside of the generator is wet or dirty. If dust
has accumulated, blow it out with dry compressed air.
Wipe off oil stains with a cloth. If the generator is damp,
dry it and recheck.
ROTATING RECTIFIER ASSEMBLY
The rotating rectifier assembly needs little attention. Clean
off dust and oil stains periodically. In the unlikely event
that it becomes necessary to replace the diode elements
and surge absorber elements. Refer to PARTS
REPLACEMENT METHOD, Point 2.
PARTS REPLACEMENT METHOD
1. Bearing Replacement:
a. In order to replace the bearing, first remove the
bearing holder housing on the end of the
generator. Loosen and remove the four housing
bolts. Remove the bearing holder gently since
there is a risk that the rotor could fall and damage
the exciter rotor or the exciter stator.
Figure 6. Pilot Length
b. Using a bearing puller, extract bearing from
shaft.
c. Wheninstallinganewbearing,placeasteelpipe
on the inner race surface, and fit the bearing by
tapping it lightly with a hammer.
Figure 7. Bearing Puller
Note:Absolutelydonotapplypressuretoouterrace
of the bearing during insertion.

OPX300K1 09/09
12
Maintenance
2. Replacement of Rotary Rectifier Parts:
a. Rotary rectifier parts are all located at the rear
of Exciter rotor. For parts replacement, remove the
bearing shield.
b. To test the rotating rectifier diodes, disconnect
the lead to the diode element and measure the
resistance between the anode and cathode on each
diode (see Figure 8).
Caution: Do not overheat the diodes. If the resist-
ance value of the diode in the forward direction is
low and the reverse direction resistance value shows
infinity, it is good. If this is not the case, the diode
element is defective and must be replaced. The diode
elements can be damaged if overtightened.
c. “J” type diode elements are fastened to the J(+)
sideoftherotatingrectifierassembly,and“K”type
diode elements to the K(-) side.
Figure 8. Testing Diode Elements
d. The Diode Torque Specifications for all 300
series modes is 5 mm = 48 in. lb.
e. In order to test whether the rotating rectifier
assembly surge absorber elements are good or
not, first disconnect all lead wires as described
in PARTS REPLACEMENT METHOD, Point 2,
(above) and measure the resistance across surge
absorber elements with a tester.
• Good surge absorber elements have about 10-30 K
ohms, but if the resistance reading is near 0 ohms, the
surge absorber elements is defective and must be
replaced.
• Also, inspect outside of surge absorber and replace if
it is cracked.
• In addition, when installing surge absorber elements,
apply Loctite to the bolts.
3. Bearing Housing Replacement:
Inspect the O-Ring. If cracked, replace. Reassemble
carefully, aligning housing with bearing. Tighten
housing bolts to 2.5 kpm (18 ft/lbs.).

OPX300K1 09/09
13
4. Rotating Rectifier Assembly Detailed Structure:
Figure 9. Rotating Rectifier.
Maintenance – Automatic Voltage Regulator
1. Keep the AVR clean at all times. Make sure no dust or moisture accumulates
on the AVR.
2. Inspect periodically making sure that wiring connections are not loose.

OPX300K1 09/09
14
Generator Specifications: Taiyo Winding Resistances
All ratings in Ohms @ 20° C
Model 4 Wire - 1 Phase 12 Wire - 3 Phase
Number U1 –V1 U2–V2
MAIN PX-308K1 0.3685 ohms 0.3685 ohms 0.599 ohms
STATOR: PX-309K1 0.3685 ohms 0.3685 ohms
PX-310K1 0.2480 ohms 0.2480 ohms 0.409 ohms
PX-312K1 0.1735 ohms 0.1735 ohms 0.293 ohms
PX-316K1 0.1075 ohms 0.1075 ohms 0.180 ohms
PX-320K1 0.0776 ohms 0.0780 ohms 0.124 ohms
PX-325K1 0.0843 ohms 0.0981 ohms
PX-332K1 0.055 ohms 0.055 ohms 0.0621 ohms
Model Ohms, 1 & 3 Phase
Number
MAIN PX-308K1 1.682 ohms
ROTOR: PX-309K1 1.528 ohms
PX-310K1 2.082 ohms
PX-312K1 2.236 ohms
PX-316K1 2.542 ohms
PX-320K1 2.900 ohms
PX-325K1 3.65 ohms
PX-332K1 3.901 ohms
Model Ohms, 1 Phase Ohms, 3 Phase
Number
EXCITER PX-308K1 35.74 ohms 47.19 ohms
STATOR: & PX-309K1
PX-310K1 35.74 ohms 47.19 ohms
PX-312K1 35.74 ohms 47.19 ohms
PX-316K1 37.89 ohms 50.03 ohms
PX-320K1 37.89 ohms 50.03 ohms
PX-325K1 37.90 ohms 42.1 ohms
PX-332K1 42.19 ohms 55.71 ohms

OPX300K1 09/09
15
Model Number U - V
EXCITER PX-308K1 & PX-309K1 0.493 ohms
ROTOR: PX-310K1 0.493 ohms
PX-312K1 0.493 ohms
PX-316K1 0.527 ohms
PX-320K1 0.532 ohms
PX-325K1 0.573 ohms
PX-332K1 0.311 ohms
Model Number 4 Wire 1 Phase
FULL LOAD PX-308K1 & PX-309K1 29.0 volts
EXCITATION: PX-310K1 27.3 volts
PX-312K1 27.9 volts
PX-316K1 25.4 volts
PX-320K1 26.4 volts
PX-325K1 25.4 volts
PX-332K1 27.56 volts
Generator Specifications: Taiyo Winding Resistances
All ratings in Ohms @ 20° C

OPX300K1 09/09
16
Sensing Output Frequency 50 Hz 60 Hz
(4) – (100) 100V Class 100 Volt Class 100V 120V
(4) – (200) 200V Class 200 Volt Class 200V 240V
Phase: Single Phase Single Phase
Power Input Voltage: 100V 139V
(4 – 3) Frequency: 50 Hz / 60 Hz
Phase: Single Phase Single Phase
Sensing Output Max. Voltage: 87% of Power Input Voltage (DC Voltage)
(F+) – (F-) Max. Current: Continuous 2.0A DC Short Period Current
Endurance 3.5A DC (1 min.)
Voltage Adjust Range AC 95V – 126 / 190V – 252V
±5% of Rated Voltage with External Voltage Control Resistor
Voltage Regulation ±1% Root Mean Square Voltage from No Load to Full Load at P.F.: 0.8 to 1.0
including 5% of Engine Speed Regulation
Response Time Within one (1) cycle
Frequency Characteristic Volts / Hertz Characteristic
Voltage Build-Up Self-Building Up at over 10V Power Input Voltage
EMI Remedy Built-in EMI Filter
Initial Drift Within ±1.0%
Temperature Drift Within ±0.025%
Working Temperature -4°F (-20°C) to 140°F (60°C)
Storage Temperature -22°F (-30°C) to 176°F (80°C)
Humidity Within 95%
Max. Allowable Vibration Within 4 G
Outside Dimension 5.6" x 4.0" x 1.72" (140mm x 100mm x 43 mm)
Weight 1 lb. (0.7 kgs)
Automatic Voltage Regulator: DST-51-DFK

OPX300K1 09/09
17
Trouble Shooting
PROBLEM POSSIBLE CAUSE RECOMMENDATION(S)
Only a FEW VOLTS Loss of residual magnetism of the exiter field • Flash field.
of output
Disconnection or short circuit of windings • Check the insulation of all windings
and check the resistance value.
Defective AVR • Check the AVR.
Defective rotating rectifier assembly • Replace diode elements.
Voltage is LOW Incorrect wiring (GEN, AVR) • Check the winding connection.
Low speed • Check the engine.
Overload • Reduce the load.
Defective AVR • Check the AVR.
Voltage DIPS Starting of big motor or spot welding machine • About 15% voltage dip is no problem.
when on load
Defective diode on rotating rectifier • Change diode.
[F(+) – F(-) terminal voltage will show a
very high value when a diode is defective]
Voltage is HIGH Incorrect wiring (GEN, AVR) • Check the AVR.
Too high speed • Check the engine.
Defective AVR • Check the AVR.
Voltage FLUCTUATES Wiring leads are loose • Tighten leads.
Irregular speed of engine • Check the engine.
Poor AVR adjustment • Check the AVR.
External noise • Check the filter.
Abnormal SOUND Foundation uneven • Check ground level.
or VIBRATION
Poor mounting • Check the mounting section.
Misaligned coupling • Check the coupling section.
Defective bearing • Replace the bearing.

OPX300K1 09/09
18
PX-300K1 Series Parts List
No Description PX-308K1/PX309K1 PX-310K1 PX-312K1 PX-316K1 PX-320K1
1 Stator Assembly (1-Phase) WKC-00011-ST WKC-00012-ST WKC-00013-ST WKC-00014-ST WKC-00015-ST
Stator Assembly (3-Phase) WKC-00016-ST WKC-00017-ST WKC-00018-ST WKC-00019-ST WKC-00020-ST
2 Rotor Assembly WKC-00011-RT WKC-00012-RT WKC-00013-RT WKC-00014-RT WKC-00015-RT
3 Excitor Stator Assembly (1-Phase) WKC-00031-ST WKC-00031-ST WKC-00031-ST WKC-00032-ST WKC-00032-ST
Excitor Stator Assembly (3-Phase) WKC-00033-ST WKC-00033-ST WKC-00033-ST WKC-00034-ST WKC-00034-ST
4 Rectifier Assembly 3T201-084-3* 3T201-084-3* 3T201-084-3* 3T201-084-3* 3T201-084-3*
5 Bearing Shield 3T301-253-3 3T301-253-3 3T301-253-3 3T301-253-3 3T301-253-3
6 O-Ring 1BG70 1BG70 1BG70 1BG70 1BG70
7 Ball Bearing 6306ZZ 6306ZZ 6306ZZ 6306ZZ 6306ZZ
8 Ventilation Cover (M Type) 3T301-329 3T301-331 3T301-331 3T301-331 3T301-331
Ventilation Cover (NL Type) 3T301-330 3T301-332 3T301-332 3T301-332 3T301-332
9 Junction Box (M Type) 1 Phase 3T301-168-2 3T301-168-2 3T301-168-2 3T301-168-2 3T301-168-2
Junction Box (M Type) 3 Phase 3T302-637-1 3T302-637-1 3T302-637-1 3T302-637-1 3T302-637-1
Junction Box (NL Type) 3T301-214-4 3T301-214-4 3T301-214-4 3T301-214-4 3T301-214-4
10 Junction Box (Top) 4T301-108 4T301-108 4T301-108 4T301-108 4T301-108
11 Junction Box (Side) 4T301-109 4T301-109 4T301-109 4T301-109 4T301-109
12 Flexible Mount 33-40007 33-40007 33-40007 33-40007 33-40007
13 Automatic Voltage Regulator 22-42037 22-42037 22-42037 22-42037 22-42037
14 Circuit Breaker (Voltage Regulator) 22-42053 22-42053 22-42053 22-42053 22-42053
15 Circuit Breaker (Engine) 22-42043 22-42043 22-42043 22-42043 22-42043
16 Terminal (Control) 22-42242 22-42242 22-42242 22-42242 22-42242
• Diode Element • Item Not Shown SKN26/12** SKN26/12** SKN26/12** SKN26/12** SKN26/12**
• Diode Element • Item Not Shown SKR26/12*** SKR26/12*** SKR26/12*** SKR26/12*** SKR26/12***
17 See next page *formerly 3T201-084 **formerly SID01-09 (74113) ***formerly ERD51-09 (74114)

OPX300K1 09/09
19
No Description PX-308K1/PX-309K1 PX-310K1 PX-312K1 PX-316K1 PX-320K1
17 Generator Mounting Bracket 3T301-267-2 R 3T301-268-2 R 3T301-268-2 R 3T301-269-2 R 3T301-269-2 R
3T301-267-2 L 3T301-268-2 L 3T301-268-2 L 3T301-269-2 L 3T301-269-2 L
18 J-Box Support Bracket, Right 4T301-309 3T301-309 3T301-309 3T301-309 3T301-309
Left 4T301-310 3T301-310 3T301-310 3T301-310 3T301-310
19 AC Terminal 22-42036 22-42036 22-42036 22-42036 22-42036
20 Relay (12VDC) 22-42047 22-42047 22-42047 22-42047 22-42047
Relay (24VDC) 22-40085 22-40085 22-40085 22-40085 22-40085
21 Relay Base 22-41032 22-41032 22-41032 22-41032 22-41032
22 Grommet GM406467 GM406467 GM406467 GM406467 GM406467
23 Grommet NG-R NG-R NG-R NG-R NG-R
• AVR Disconnect Instructions 4T601-011 4T601-011 4T601-011 4T601-011 4T601-011
• Field Flashing Instructions GE43037 GE43037 GE43037 GE43037 GE43037
PX-300K1 Series Parts List
• Item Not Shown

OPX300K1 09/09
20
PX-320C Parts List
No Description PX-320C
1 Stator Assembly WKC-00020-1-ST
2 Rotor Assembly WKC-00020-1-RT
3 Excitor Stator Assembly WKC-00034-ST
4 Rectifier Assembly 3T201-084
5 Bearing Shield 3T301-253-3
6 O-Ring 1BG70
7 Ball Bearing 6306ZZ
8 Ventilation Cover 3T302-896
9 Terminal Box (M Type) 3T302-637-1
10 Terminal Box (Top) 4T301-108
11 Terminal Box (Side) 4T301-109
12 Rubber Damper 33-40007
13 Automatic Voltage Regulator 22-42037
14 Circuit Breaker (Generator) 22-42053
15 Circuit Breaker (Engine) 22-42043
16 Terminal (Auxiliary) 22-42242
17 Generator Mounting Bracket 3T301-269-2 R & 3T301-269-2 L
18 Terminal (Output) UKT60-3J
19 Terminal (Output) TE-K22-4
23 Drip Proof Cover for Ventilation Cover 4T302-897
24 Foot of Drip Proof Cover for Ventilation Cover 4T302-898
* Diode Element (not shown) SID 01-09
* Diode Element (not shown) ERD 51-09