Woodward 2301A User manual

Installation and Operation Manual
2301A Electronic
Load Sharing and Speed Control
9905/9907 Series
UL Listed E97763
Manual 82389 (Revision N)

WARNING—DANGER OF DEATH OR PERSONAL INJURY
WARNING—FOLLOW INSTRUCTIONS
Read this entire manual and all other publications pertaining to the work to be performed
before installing, operating, or servicing this equipment. Practice all plant and safety
instructions and precautions. Failure to follow instructions can cause personal injury and/or
property damage.
WARNING—OUT-OF-DATE PUBLICATION
This publication may have been revised or updated since this copy was produced. To verify
that you have the latest revision, be sure to check the Woodward website:
www.woodward.com/pubs/current.pdf
The revision level is shown at the bottom of the front cover after the publication number. The
latest version of most publications is available at:
www.woodward.com/publications
If your publication is not there, please contact your customer service representative to get
the latest copy.
WARNING—OVERSPEED PROTECTION
The engine, turbine, or other type of prime mover should be equipped with an overspeed
shutdown device to protect against runaway or damage to the prime mover with possible
personal injury, loss of life, or property damage.
The overspeed shutdown device must be totally independent of the prime mover control
system. An overtemperature or overpressure shutdown device may also be needed for
safety, as appropriate.
WARNING—PROPER USE
Any unauthorized modifications to or use of this equipment outside its specified
mechanical, electrical, or other operating limits may cause personal injury and/or property
damage, including damage to the equipment. Any such unauthorized modifications: (i)
constitute "misuse" and/or "negligence" within the meaning of the product warranty
thereby excluding warranty coverage for any resulting damage, and (ii) invalidate product
certifications or listings.
CAUTION—POSSIBLE DAMAGE TO EQUIPMENT OR PROPERTY
CAUTION—BATTERY CHARGING
To prevent damage to a control system that uses an alternator or battery-charging device, make
sure the charging device is turned off before disconnecting the battery from the system.
CAUTION—ELECTROSTATIC DISCHARGE
Electronic controls contain static-sensitive parts. Observe the following precautions to
prevent damage to these parts.
• Discharge body static before handling the control (with power to the control turned off,
contact a grounded surface and maintain contact while handling the control).
• Avoid all plastic, vinyl, and Styrofoam (except antistatic versions) around printed circuit
boards.
• Do not touch the components or conductors on a printed circuit board with your hands
or with conductive devices.
IMPORTANT DEFINITIONS
• A WARNING indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
• A CAUTION indicates a potentially hazardous situation which, if not avoided, could result in
damage to equipment or property.
• A NOTE provides other helpful information that does not fall under the warning or caution
categories.
Woodward Governor Company reserves the right to update any portion of this publication at any time. Information
provided by Woodward Governor Company is believed to be correct and reliable. However, no responsibility is
assumed by Woodward Governor Company unless otherwise expressly undertaken.
© Woodward 1987
All Rights Reserved

Manual 82389 2301A LSSC
Woodward i
Contents
ELECTROSTATIC DISCHARGE AWARENESS ..................................................III
CHAPTER 1. GENERAL INFORMATION........................................................... 1
Description..............................................................................................................1
Applications ............................................................................................................1
References .............................................................................................................2
2301A Load Sharing and Speed Control Models, 9905/9907 Series ....................3
CHAPTER 2. INSTALLATION.......................................................................... 7
Unpacking...............................................................................................................7
Power Requirements..............................................................................................7
Location Considerations.........................................................................................7
Electrical Connections............................................................................................7
Shielded Wiring ......................................................................................................8
Setting Speed Range .............................................................................................8
Potential Transformer Connections........................................................................9
Current Transformer Connections..........................................................................9
Droop Contact (Isoch-Droop) and Load Sharing Lines........................................10
Power Supply .......................................................................................................11
Minimum Fuel Contact..........................................................................................11
Failed Speed Signal Override ..............................................................................11
Idle/Rated Ramp Contact .....................................................................................12
Actuator Output ....................................................................................................12
External Speed Trim.............................................................................................12
Speed and Phase Matching (SPM) Synchronizer................................................12
Speed Sensor.......................................................................................................12
Installation Check-out Procedure .........................................................................13
CHAPTER 3. OPERATION AND ADJUSTMENT............................................... 14
Initial Pre-Start Settings........................................................................................14
Start-Up Adjustments ...........................................................................................14
Adjust For Stable Operation .................................................................................16
Speed Setting Adjustment....................................................................................16
Dynamic Adjustment.............................................................................................16
Actuator Compensation Adjustment.....................................................................17
Low Idle Speed Adjustment..................................................................................17
Ramp Time Adjustment ........................................................................................17
Start Fuel Limit Adjustment ..................................................................................19
Speed Sensor Check ...........................................................................................19
Current Transformer (CT) Phasing Check ...........................................................19
Phase Correction Procedure ................................................................................20
Load Gain Adjustment..........................................................................................23
Droop Adjustment.................................................................................................24
CHAPTER 4. DESCRIPTION OF OPERATION ................................................. 26
Introduction...........................................................................................................26
Speed Control.......................................................................................................26
Terminals for External Devices ............................................................................28
Paralleling.............................................................................................................28
CHAPTER 5. TROUBLESHOOTING............................................................... 31
Troubleshooting Procedure ..................................................................................31

2301A LSSC Manual 82389
ii Woodward
Contents
CHAPTER 6. SERVICE OPTIONS..................................................................38
Product Service Options.......................................................................................38
Returning Equipment for Repair...........................................................................39
Replacement Parts ...............................................................................................40
How to Contact Woodward...................................................................................40
Engineering Services............................................................................................41
Technical Assistance............................................................................................42
2301A LOAD SHARING AND SPEED CONTROL ............................................44
DECLARATIONS .........................................................................................45
Illustrations and Tables
Figure 1-1. 2301A Control Outline Drawing ...........................................................4
Figure 1-2a. Plant Wiring Diagram (low-voltage supply)........................................5
Figure 1-2b. Plant Wiring Diagram (high-voltage supply) ......................................6
Figure 2-1. Preparation and Installation of Shielded Cables..................................8
Figure 2-2. Switch S1 .............................................................................................9
Figure 2-3. Droop Contact and Circuit Breaker Auxiliary Contact........................10
Figure 3-1. Diesel Engine Performance Curves...................................................18
Figure 3-2. Temporary Wiring for Transformer Phase Correction .......................21
Figure 3-3. Droop Adjustment ..............................................................................24
Figure 3-4. 3% Droop at 60 Hz.............................................................................25
Figure 4-1. Speed Control System .......................................................................26
Figure 4-2. Speed Control Adjustments ...............................................................27
Figure 4-3. Terminal Connections ........................................................................29
Figure 4-4. Paralleling System .............................................................................30
Figure 4-5. Paralleling Adjustments .....................................................................30
Table 1-1. Low-Voltage 2301A Models (20 to 40 Vdc) ..........................................3
Table 1-2. High-Voltage 2301A Models (88–132 Vac or 90–150 Vdc)..................3
Table 6-1. Troubleshooting ..................................................................................31

Manual 82389 2301A LSSC
Woodward iii
Electrostatic Discharge Awareness
All electronic equipment is static-sensitive, some components more than others.
To protect these components from static damage, you must take special
precautions to minimize or eliminate electrostatic discharges.
Follow these precautions when working with or near the control.
1. Before doing maintenance on the electronic control, discharge the static
electricity on your body to ground by touching and holding a grounded metal
object (pipes, cabinets, equipment, etc.).
2. Avoid the build-up of static electricity on your body by not wearing clothing
made of synthetic materials. Wear cotton or cotton-blend materials as much
as possible because these do not store static electric charges as much as
synthetics.
3. Keep plastic, vinyl, and Styrofoam materials (such as plastic or Styrofoam
cups, cup holders, cigarette packages, cellophane wrappers, vinyl books or
folders, plastic bottles, and plastic ash trays) away from the control, the
modules, and the work area as much as possible.
4. Do not remove the printed circuit board (PCB) from the control cabinet
unless absolutely necessary. If you must remove the PCB from the control
cabinet, follow these precautions:
•Do not touch any part of the PCB except the edges.
•Do not touch the electrical conductors, the connectors, or the
components with conductive devices or with your hands.
•When replacing a PCB, keep the new PCB in the plastic antistatic
protective bag it comes in until you are ready to install it. Immediately
after removing the old PCB from the control cabinet, place it in the
antistatic protective bag.
CAUTION—ELECTROSTATIC DISCHARGE
To prevent damage to electronic components caused by improper handling,
read and observe the precautions in Woodward manual 82715, Guide for
Handling and Protection of Electronic Controls, Printed Circuit Boards, and
Modules.

2301A LSSC Manual 82389
iv Woodward

Manual 82389 2301A LSSC
Woodward 1
Chapter 1.
General Information
Description
The 9905/9907 series of the Woodward 2301A controls load sharing and speed
of generators driven by diesel or gasoline engines, or steam or gas turbines.
These power sources are referred to as “prime movers” throughout this manual.
The control is housed in a sheet-metal chassis and consists of a single printed
circuit board. All potentiometers are accessible from the front of the chassis.
The 2301A provides control in either isochronous or droop mode.
The isochronous mode is used for constant prime mover speed with:
• Single-prime-mover operation;
• Two or more prime movers controlled by Woodward load sharing control
systems on an isolated bus;
• Base loading against an infinite bus with the load controlled by an Automatic
Power Transfer and Load (APTL) Control, an Import/Export Control, a Generator
Loading Control, a Process Control, or another load-controlling accessory.
The droop mode is used for speed control as a function of load with:
• Single-prime-mover operation on an infinite bus or
• Parallel operation of two or more prime movers.
The following is an example of the typical hardware needed for the 2301A
system controlling a single prime-mover and generator:
• A 2301A electronic control
• An external 20 to 40 Vdc power source for low-voltage models; 90 to 150
Vdc or 88 to 132 Vac for high-voltage models
• A proportional actuator to position the fuel-metering device, and
• Current and potential transformers for measuring the load carried by the
generator.
Applications
The 2301A 9905/9907 series electronic controls have switch-selectable speed
ranges. Any of these control models can be set to operate within one of the
following rated speed ranges:
• 500 to 1500 Hz
• 1000 to 3000 Hz
• 2000 to 6000 Hz
• 4000 to 12 000 Hz
WARNING—OVERSPEED
The speed range is factory set for 2000 to 6000 Hz. Refer to the inside cover
to change speed range and prevent possible overspeed. Using the wrong
speed range could cause an overspeed with resulting damage to equipment
and/or personal injury or death.
CAUTION—DO NOT TURN POTS BEYOND THEIR STOPS
The Rated Speed potentiometer is the only multi-turn pot in this control. All
other pots are single-turn. Take care not to turn these pots beyond their stops.

2301A LSSC Manual 82389
2 Woodward
These controls are available for forward- or reverse-acting applications, and for
use with either single or tandem actuators. Models for three different actuator
current ranges are available, as well as a high-voltage model (90 to 150 Vdc or
88 to 132 Vac, 45 to 440 Hz), and a low-voltage model (20 to 40 Vdc). The high
voltage model is identified as such on the front; the low voltage model is not.
In reverse-acting systems, the actuator calls for more fuel when the actuator
voltage decreases. Complete loss of voltage to the actuator will drive the
actuator to full fuel. This allows a backup mechanical ballhead governor to take
control rather than shut down the prime mover as would a direct-acting system.
An optional deceleration ramp is also offered. When this option is present, the
time to ramp from rated speed to idle speed is approximately 20 seconds. If this
option is not present, this happens instantly.
Tables 1-1 and 1-2 show part numbers and features of all 9905/9907 series
2301A load sharing and speed controls.
NOTE
External wiring connections for reverse-acting controls are identical to
those for direct-acting controls.
The relationship between prime mover speed and sensor output frequency is
expressed in the formula:
Sensor Frequency in Hz equals the number of teeth on the speed
sensing gear times the rated prime mover speed in revolutions
per minute divided by 60.
Application engineers from Woodward or any of its authorized distributors or
agents are always available to assist you in selection of the correct control for
your system, or to answer questions concerning control installation, operation, or
calibration. See Chapter 6 for contact information.
References
The following publications contain additional product or installation information on
Load Sharing and Speed Controls, and related components. They are available
on the Woodward website (www.woodward.com/ic).
technical
manual title
25070 Electronic Governor Installation Guide
26260 Governing Fundamentals and Power Management
82384 SPM-A Synchronizer 9905-002
82510 Magnetic Pickups & Proximity Switches for Electronic Controls
82715 Guide for Handling and Protection of Electronic Controls, Printed
Circuit Boards, and Modules
product
specification title
82383 SPM-A Synchronizer
82390 2301A Load Sharing and Speed Controls (9905 Series)
82516 EG3P/6P/10P Actuator
82575 EGB1P/2P Governor/Actuator

Manual 82389 2301A LSSC
Woodward 3
2301A Load Sharing and Speed Control Models,
9905/9907 Series
Table 1-1. Low-Voltage 2301A Models (20 to 40 Vdc)
Part
Number
Actuator Current
(mA)
Forward/
Reverse Acting
Actuator
Tandem/Single Decel Ramp
9905-020
9905-021
9905-022
9905-023
9905-024
9905-025
9905-026
9905-027
9905-028
9905-029
9907-018 *
9907-019 *
9907-023 *
9907-024 *
0–200
0–200
0–400
0–400
0–200
0–200
0–20
0–20
0–200
0–200
0–200
0–200
0–200
0–200
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Single
Single
Single
Single
Tandem
Tandem
Single
Single
Single
Single
Single
Single
Single
Single
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
*—CE Approved models
Table 1-2. High-Voltage 2301A Models (88–132 Vac or 90–150 Vdc)
Part
Number
Actuator Current
(mA)
Forward/
Reverse Acting
Actuator
Tandem/Single Decel Ramp
9905-030
9905-031
9905-032
9905-033
9905-034
9905-035
9905-036
9905-037
9905-038
9905-039
0–200
0–200
0–400
0–400
0–200
0–200
0–20
0–20
0–200
0–200
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Single
Single
Single
Single
Tandem
Tandem
Single
Single
Single
Single
No
No
No
No
No
No
No
No
Yes
Yes
NOTE
The 20–40 Vdc input power must be supplied from a power supply/battery
charger certified to IEC standard with SELV (Safety Extra Low Voltage)
classified output. The installer should properly size wiring and fusing for the
input power and PT/CT circuits.
Speed Ranges
On these Woodward 2301A models, any one of the following speed ranges may
be selected by a switch:
500 to 1500 Hz 1000 to 3000 Hz
2000 to 6000 Hz 4000 to 12 000 Hz
Power Supply Voltage
These Woodward 2301A controls accept either a high-voltage or a low-voltage
power source. The low voltage models operate on 20 to 40 Vdc, and the high
voltage models operate on either 88 to 132 Vac or 90 to 150 Vdc. Both the low-
and high-voltage models require a power capacity of 15 W minimum.

2301A LSSC Manual 82389
4 Woodward
Figure 1-1. 2301A Control Outline Drawing
(low voltage version—top, high voltage version—bottom)

Manual 82389 2301A LSSC
Woodward 5
Figure 1-2a. Plant Wiring Diagram (low-voltage supply)

2301A LSSC Manual 82389
6 Woodward
Figure 1-2b. Plant Wiring Diagram (high-voltage supply)

Manual 82389 2301A LSSC
Woodward 7
Chapter 2.
Installation
Unpacking
Before handling the control, read the “Electrostatic Discharge Awareness”
precautions on page iii. Be careful when unpacking the electronic control. Check
the control for signs of damage such as bent or dented panels, scratches, and
loose or broken parts. If any damage is found, immediately notify the shipper.
Power Requirements
The 2301A control requires a voltage source of 18 to 40 Vdc, 90 to 150 Vdc, or
88 to 132 Vac for operating power (15 W). If a battery is used for operating
power, an alternator or other battery charging device is necessary to maintain a
stable supply voltage.
CAUTION—BATTERY
To prevent damage to the control, make sure that the alternator or other
battery-charging device is turned off or disconnected before disconnecting
the battery from the control.
Location Considerations
This product is intended for installation in a “closed electrical operating
area” or in a closed industrial control cabinet. Consider these requirements
when selecting the mounting location:
• Adequate ventilation for cooling
• Space for servicing and repair
• Protection from direct exposure to water or to a condensation-prone
environment
• Protection from high-voltage or high-current devices, or devices which
produce electromagnetic interference
• Avoidance of vibration
• Selection of a location that will provide an operating temperature range of
–40 to +70 °C (–40 to +158 °F)
• The control must NOT be mounted on the engine.
Electrical Connections
External wiring connections and shielding requirements for a typical control
installation are shown in the plant wiring diagram (Figure 1-2). These wiring
connections and shielding requirements are explained in the balance of this
chapter.

2301A LSSC Manual 82389
8 Woodward
Shielded Wiring
All shielded cable must be twisted conductor pairs. Do not attempt to tin (solder)
the braided shield. All signal lines should be shielded to prevent picking up stray
signals from adjacent equipment. Connect the shields to the control terminals as
shown in Figure 2-1 and in the plant wiring diagram (Figure 1-2). Wire exposed
beyond the shield should be as short as possible, not exceeding 50 mm (2
inches). The other end of the shields must be left open and insulated from any
other conductor. Do not run shielded signal wires with other wires carrying large
currents. See Woodward application note 50532, EMI Control for Electronic
Governing Systems, for more information.
Where shielded cable is required, cut the cable to the desired length and prepare
the cable as instructed below and shown in Figure 2-1.
1. Strip outer insulation from BOTH ENDS, exposing the braided or spiral
wrapped shield. DO NOT CUT THE SHIELD.
2. Using a sharp, pointed tool, carefully spread the strands of the shield.
3. Pull inner conductor(s) out of the shield. If shield is the braided type, twist to
prevent fraying.
4. Remove 6 mm (1/4 inch) of insulation from the inner conductor(s).
5. Connect wiring and shield as shown.
In installations with severe electromagnetic interference (EMI), shielded wire run
in conduit, double shielded wire, or other precautions may be required. Contact
Woodward for more information.
Figure 2-1. Preparation and Installation of Shielded Cables
Setting Speed Range
The speed range to be selected is determined by the maximum desired prime
mover speed. Calculate the frequency of the speed sensor signal at the
maximum prime mover speed by multiplying the gear speed in revolutions per
minute times the number of teeth on the speed sensing gear and dividing by 60.
Select the lowest speed range which contains this maximum speed sensor
frequency.

Manual 82389 2301A LSSC
Woodward 9
Figure 2-2 shows the four sections of Switch S1 and their corresponding speed
ranges. Set the proper section of Switch S1 to the ON position and the other
three positions of Switch S1 to the OFF position.
WARNING—OVERSPEED
The speed range is factory set for 2000 to 6000 Hz. Refer to the inside cover
to change speed range and prevent possible overspeed. Using the wrong
speed range could cause an overspeed with resulting damage to equipment
and/or personal injury or death.
Figure 2-2. Switch S1
Potential Transformer Connections
Connect the potential transformer secondary leads to the following terminals:
• Phase A to terminal 1
• Phase B to terminal 2
• Phase C to terminal 3
The potential transformer secondary line-to-line voltage must be in the 90 to 240
Vrms range. Refer to the plant wiring diagram (Figure 1-2).
Current Transformer Connections
The standard method of connecting the current transformers is shown in the
plant wiring diagram (Figure 1-2). An alternate method is the open delta
connection shown in the insert in the plant wiring diagram.

2301A LSSC Manual 82389
10 Woodward
Droop Contact (Isoch-Droop) and Load Sharing Lines
Because the load-sharing-line relay is contained in the control, no relay is
required between the control and the load-sharing-line bus. Use shielded cable
and connect the load-sharing lines directly to terminals 10 (+) and 11 (–).
Connect the shield to terminal 12. When all controls in the system are of the
2301A type, the shields may be connected continuously between controls. When
load sharing with different controls, do not connect the shields at the point where
connections are made to the load-sharing-line bus.
The droop contact for selecting droop or isochronous operation is wired in series
with the circuit-breaker auxiliary contact between terminal 14 and terminal 16
(terminal 0 on high-voltage controls). When both the droop contact and circuit-
breaker auxiliary contact are closed, the control is in the isochronous load-
sharing mode (Figure 2-3, A). In this mode, the internal load-sharing-line relay is
energized, the droop signal is disabled (permitting isochronous load sharing),
and the load-matching circuit is connected to the load-sharing lines.
The control is in the droop mode when EITHER the droop contact or the circuit-
breaker auxiliary contact is open (Figure 2-3, B). If the droop contact is open, the
control remains in the droop mode even when the circuit-breaker auxiliary
contact is closed.
Figure 2-3. Droop Contact and Circuit Breaker Auxiliary Contact
NOTE
The control is in the droop mode whenever the circuit-breaker auxiliary
contact is open. If a single prime mover is required to run isochronously
with an isolated load, turn the DROOP potentiometer fully counterclockwise
(be careful not to overtorque the pot).

Manual 82389 2301A LSSC
Woodward 11
Droop operation is required when the generator is paralleled with an infinite bus
without a Generator Loading Control, Process Control, Automatic Power Transfer
and Load Control, Import/Export Control, or other load controlling accessory, or
when paralleled with incompatible governors. (All Woodward electric load-
sharing systems are compatible.) When running a single unit on an infinite bus
with a Generator Loading Control or Import/Export Control, terminal 14 must be
connected to terminal 16 (terminal 0 on high-voltage controls) to connect the
Load Matching Circuit to the load-sharing lines. The load-sharing lines must be
wired to the Generator Loading Control or Import/Export Control. The circuit-
breaker auxiliary contact will then be connected to the Generator Loading Control
or Import/Export Control and not to the 2301A Load Sharing and Speed Control.
Power Supply
Run the power leads directly from the power source to the control, connecting
the negative lead to terminal 15, and the positive lead to terminal 16. If the power
source is a battery, be sure the system includes an alternator or other battery-
charging device.
CAUTION—DO NOT APPLY POWER
DO NOT apply power to the control at this time. Applying power before a
control is completely connected may damage the control.
Minimum Fuel Contact
The minimum-fuel contact is intended as an optional means for a normal
shutdown of the prime mover. It is connected in series with terminal 16 (terminal
0 on high-voltage controls) and terminal 17 as shown in the plant wiring diagram
(Figure 1-2). Do NOT remove this jumper from terminal 17 unless a minimum
fuel contact is installed; the control will not operate without 18 to 40 Vdc applied
to terminal 17.
When the contact is closed, the voltage applied to terminal 17 allows the control
to move the actuator to any position required for operating conditions.
WARNING—EMERGENCY STOP
Do NOT use the minimum-fuel contact as part of any emergency stop
sequence.
Failed Speed Signal Override
A contact to override the failed-speed-signal circuit can be installed in series with
terminal 18 and the dc power to the control. When the contact is open, the
control operates normally, turning the control output off in the event of a loss of
speed signal. Closing the contact overrides the failed-speed-signal circuit as may
be required for start-up.
Prior to start-up of the prime mover, the speed signal is nonexistent. On prime
movers with cranking motors, the cranking speed is usually sufficient to provide a
speed signal, so an override contact on terminal 18 is not needed for starting. On
some steam turbine systems, the Close to Override Failed Speed Signal contact
must be closed in order to allow the actuator to open and provide steam for starting.
If a failed-speed-signal-override contact is used, it should be of the momentary type
to ensure that the failed-speed-sensor shutdown circuit is enabled after start-up.

2301A LSSC Manual 82389
12 Woodward
Idle/Rated Ramp Contact
Connect a single-pole, single-throw contact from terminal 16 (terminal 0 on high-
voltage controls) to terminal 19, the Close For Rated (open for idle, close for
rated) terminal. Oil pressure is often used to close this contact. When closed, 20
to 40 Vdc is applied to terminal 19, and the prime mover can be operated at a
speed higher than idle. When the contact is open, the voltage is removed from
terminal 19, and the prime mover’s speed immediately decelerates to idle.
Actuator Output
The actuator wires connect to terminals 20 (+) and 21 (–). Use shielded wires
with the shield connected to terminal 22. Do not connect the shield to the
actuator or any other point. The shield must have continuity the entire distance to
the actuator, and must be insulated from all other conducting surfaces. Refer to
the manuals listed in Chapter 1, References, table for additional information on
actuator installation.
External Speed Trim
A jumper must be connected to terminals 23 and 24 unless an optional remote
Speed Trim potentiometer is used. If a Speed Trim potentiometer is used.
connect it as shown in the plant wiring diagram (Figure 1-2), using shielded wire.
Connect the shield to terminal 22. Make sure the shield has continuity the entire
distance to the potentiometer, and that the shield is insulated from all other
conducting surfaces. A 100 Ωpotentiometer will provide ±5% speed adjustment.
If less adjustment is desired, potentiometers of smaller values may be used.
Potentiometers of the multi-turn type are recommended.
Speed and Phase Matching (SPM) Synchronizer
Connect the SPM Synchronizer (optional equipment) wires to terminals 25 (+)
and 26 (–). Use shielded wire, and connect the shield to terminal 27. Make sure
the shield has continuity the entire distance to the SPM Synchronizer, but do not
connect the shield to the synchronizer. The shield must be insulated from all
other conducting surfaces.
Speed Sensor
Connect a speed-sensing device, such as a magnetic pickup, to terminals 28 and
29 using shielded wire. Connect the shield to terminal 27. making sure the shield
has continuity the entire distance to the speed sensor, and that the shield is
insulated from all other conducting surfaces.

Manual 82389 2301A LSSC
Woodward 13
Installation Check-out Procedure
With the installation completed as described in this chapter, do the following
check-out procedure before beginning the start-up adjustments in Chapter 3.
1. Visual Inspection
A. Check the linkage between the actuator and the prime mover for
looseness or binding. Refer to the appropriate actuator manual and to
Woodward manual 25070, Electronic Governor Installation Guide, for
additional information on linkage.
WARNING—MINIMUM FUEL POSITION
The actuator lever should be near but not at the minimum position when the
fuel or steam rack is at the minimum position. If the actuator lever gets to its
minimum position before completely shutting off fuel or steam, the control
may not be able to shut the turbine down, causing damage to equipment or
injury or death.
B. Check for correct wiring per the plant wiring diagram (Figure 1-2).
C. Check for broken terminals and loose terminal screws.
D. Check the speed sensor for visible damage. If the sensor is a magnetic
pickup, check the clearance between the gear and the sensor, and
adjust if necessary. Clearance should be between 0.25 and 1.00 mm
(0.010 and 0.040 inch) at the closest point. Make sure the gear has
less than 0.50 mm (0.020 inch) diametric runout. See Woodward
manual 82510, Magnetic Pickups & Proximity Switches for Electronic
Governors.
2. Check for Grounds
Make sure power is off. Check for grounds by measuring the resistance from
terminal 11 to chassis, and from terminal 15 to 11. The resistance should be
infinite. If a resistance other than infinite is obtained, remove the connections
from each terminal one at a time until the resistance is infinite. Check the line
that was removed last to locate the fault.

2301A LSSC Manual 82389
14 Woodward
Chapter 3.
Operation and Adjustment
Initial Pre-Start Settings
WARNING—READ FULL PROCEDURE
Read this entire procedure before starting the prime mover.
CAUTION—DO NOT TURN POTS BEYOND THEIR STOPS
The Rated Speed potentiometer is the only multi-turn pot in this control. All
other pots are single-turn. Take care not to turn these pots beyond their
stops.
1. RATED SPEED
A. Set the RATED SPEED potentiometer to minimum (fully
counterclockwise).
B. Set the external Speed Trim, if used, to mid-position.
2. RESET—Set at mid-position.
3. GAIN—Set at mid-position.
4. RAMP TIME—Set at maximum (fully clockwise—be careful not to
overtorque the pot).
5. LOW IDLE SPEED—Set at maximum (fully clockwise—be careful not to
overtorque the pot).
6. LOAD GAIN—Set at mid-position.
7. DROOP—Set at minimum (fully counterclockwise—be careful not to
overtorque the pot).
8. ACTUATOR COMPENSATION.
A. Set the ACTUATOR COMPENSATION potentiometer at 2 on the 0 to
10 potentiometer scale for diesel, gas turbine, or fuel-injected gasoline
prime movers.
B. Set the ACTUATOR COMPENSATION potentiometer at 6 on the 0 to
10 potentiometer scale for carbureted-gas or gasoline prime movers,
and steam turbines.
9. START FUEL LIMIT—Set at maximum (fully clockwise—be careful not to
overtorque the pot).
10. Be sure that the actuator is connected to terminals 20 and 21.
Start-Up Adjustments
1. Complete the installation checkout procedure in Chapter 2, and the initial
prestart settings above.
CAUTION—SPEED RANGE SWITCH
Be sure the speed range switch is set on the right speed range for your
application as described in Chapter 2.