Woodward 2301A User manual

Product Manual 82046
(Revision NEW, 1990)
Original Instructions
2301A Load Sharing & Speed Control
with Dual Dynamics
Installation and Operation Manual

General
Precautions
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.
Revisions
This publication may have been revised or updated since this copy was produced.
To verify that you have the latest revision, check manual 26311 , Revision Status &
Distribution Restrictions of Woodward Technical Publications, on the publications
page of the Woodward website:
www.woodward.com/publications
The latest version of most publications is available on the publications page. If
your publication is not there, please contact your customer service representative
to get the latest copy.
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.
Translated
Publications
If the cover of this publication states "Translation of the Original Instructions"
please note:
The original source of this publication may have been updated since this
translation was made. Be sure to check manual 26311 , Revision Status &
Distribution Restrictions of Woodward Technical Publications, to verify whether
this translation is up to date. Out-of-date translations are marked with . Always
compare with the original for technical specifications and for proper and safe
installation and operation procedures.
Revisions—Changes in this publication since the last revision are indicated by a black line
alongside the text.
Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is
believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly
undertaken. Manual 82046
Copyright © Woodward 1990
All Rights Reserved

Manual 82046 2301A LSSC with Dual Dynamics
Woodward i
Contents
WARNINGS AND NOTICES............................................................................III
ELECTROSTATIC DISCHARGE AWARENESS ................................................. IV
CHAPTER 1. GENERAL INFORMATION...........................................................1
Description..............................................................................................................1
Dual Dynamics .......................................................................................................1
System Accommodating Features .........................................................................2
References .............................................................................................................3
CHAPTER 2. INSTALLATION..........................................................................4
Unpacking...............................................................................................................4
Selection of Speed Range......................................................................................4
Power Requirements..............................................................................................4
Location Considerations.........................................................................................5
Electrical Connections............................................................................................5
Shielded Wiring ......................................................................................................5
Power Sensing And Load Sharing Connections ....................................................6
Power Supply .........................................................................................................7
External Adjustments..............................................................................................8
Switch Options........................................................................................................8
Speed Sensor.........................................................................................................9
Dual Dynamic Contact............................................................................................9
Start Fuel Limit Disable Contact...........................................................................10
Installation Checkout Procedure ..........................................................................10
CHAPTER 3. OPERATION AND ADJUSTMENT...............................................14
Initial Pre-Start Settings........................................................................................14
Start-up Adjustments............................................................................................15
Adjust for Stable Operation ..................................................................................16
Speed Setting Adjustment....................................................................................16
Dynamic Adjustment.............................................................................................16
Actuator Compensation Adjustment.....................................................................17
Low Idle Speed Adjustment..................................................................................17
Accel Ramp Time Adjustment..............................................................................18
Decel Ramp Time Adjustment..............................................................................18
Start Fuel Limit Adjustment ..................................................................................18
Speed Sensor Check............................................................................................20
Current Transformer (CT) Phasing Check ...........................................................20
Phase Correction Procedure................................................................................21
Load Gain Adjustment..........................................................................................24
Droop Adjustment.................................................................................................24
Setting Droop and Load Gain, using an Infinite Bus for Load..............................25
CHAPTER 4. DESCRIPTION OF OPERATION.................................................27
Introduction...........................................................................................................27
Dual Dynamics .....................................................................................................27
Speed Control.......................................................................................................28
Terminals for External Devices ............................................................................30
Paralleling.............................................................................................................31
Power Supply .......................................................................................................33
CHAPTER 5. TROUBLESHOOTING...............................................................34

2301A LSSC with Dual Dynamics Manual 82046
ii Woodward
Contents
CHAPTER 6. PRODUCT SUPPORT AND SERVICE OPTIONS ...........................37
Product Support Options......................................................................................37
Product Service Options.......................................................................................37
Returning Equipment for Repair...........................................................................38
Replacement Parts...............................................................................................38
Engineering Services............................................................................................39
Contacting Woodward’s Support Organization ....................................................39
Technical Assistance............................................................................................40
Illustrations and Tables
Figure 2-1. Speed Range Switch............................................................................4
Figure 2-2. Preparation of Shielded Cables...........................................................6
Figure 2-3. Plant Wiring Diagram.........................................................................11
Figure 2-4. Plant Wiring Diagram and Optional Connections ..............................12
Figure 2-5. Outline Drawing of 2301A Speed Control With Dual Dynamics........13
Figure 3-1. Diesel Engine Performance Curves...................................................19
Figure 3-2. Temporary Wiring for Transformer Phase Correction........................22
Figure 3-3. Droop Adjustment ..............................................................................25
Figure 3-4. Droop Base Load with 5% Droop.......................................................26
Figure 4-1. Second Dynamics Adjustments.........................................................27
Figure 4-2. Speed Control System.......................................................................28
Figure 4-3. Speed Control Adjustments...............................................................29
Figure 4-4. Reverse Acting System......................................................................31
Figure 4-5. Paralleling System .............................................................................31
Figure 4-6. Terminal Connections........................................................................32
Figure 4-7. Paralleling Adjustments......................................................................33

Manual 82046 2301A LSSC with Dual Dynamics
Woodward iii
Warnings and Notices
Important Definitions
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
DANGER—Indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
WARNING—Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION—Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
NOTICE—Indicates a hazard that could result in property damage only
(including damage to the control).
IMPORTANT—Designates an operating tip or maintenance suggestion.
Overspeed /
Overtemperature /
Overpressure
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.
Personal Protective
Equipment
The products described in this publication may present risks that
could lead to personal injury, loss of life, or property damage. Always
wear the appropriate personal protective equipment (PPE) for the job
at hand. Equipment that should be considered includes but is not
limited to:
Eye Protection
Hearing Protection
Hard Hat
Gloves
Safety Boots
Respirator
Always read the proper Material Safety Data Sheet (MSDS) for any
working fluid(s) and comply with recommended safety equipment.
Start-up
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
Automotive
Applications
On- and off-highway Mobile Applications: Unless Woodward's control
functions as the supervisory control, customer should install a
system totally independent of the prime mover control system that
monitors for supervisory control of engine (and takes appropriate
action if supervisory control is lost) to protect against loss of engine
control with possible personal injury, loss of life, or property damage.

2301A LSSC with Dual Dynamics Manual 82046
iv Woodward
Battery Charging
Device
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.
Electrostatic Discharge Awareness
Electrostatic
Precautions
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.
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.
Follow these precautions when working with or near the control.
1. 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.
2. 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.

Manual 82046 2301A LSSC with Dual Dynamics
Woodward 1
Chapter 1.
General Information
Description
The 2301A controls load sharing and speed of generators driven by diesel or gas
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 the isochronous or droop mode.
The isochronous mode is used for constant speed of the controlled prime mover
with:
Single prime mover operation
Two or more prime movers controlled by Woodward Governor Company load
sharing control systems on an isolated bus
Base loading against an infinite bus with 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
Designations for products covered in this manual:
Supply
Voltage Forward Acting Part Number Reverse Acting Part Number
10 to 40 Vdc 8272-766 8272-768
88-131 Vac
or
90-150 Vdc 8272-767 8272-769
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 basic 2301A system for a single prime-mover generator consists of:
A 2301A electronic control
An external 20 to 40 Vdc power source (low voltage model), or an external
90 to 150 Vdc or 88 to 132 Vac power source (high voltage model)
A speed-sensing device (MPU)
A proportional actuator to position the fuel- or steam-metering device
Current and potential transformers for measuring the load carried by the
generator
Dual Dynamics
The 2301A with Dual Dynamics is primarily used in applications where the
response time of the prime mover changes dramatically between start-up or
unloaded and loaded situations, or in dual fuel applications.

2301A LSSC with Dual Dynamics Manual 82046
2 Woodward
Each set of dynamics has its own gain, reset, and actuator compensation
adjustments. The selection of dynamics is made by a switch contact. A light
emitting diode (LED) on the front of the 2301A control indicates when the
alternate set of dynamics is being used by the control.
System Accommodating Features
2301A Controls with Dual Dynamics are available for forward- or reverse-acting
applications. High voltage models accept 88 to 132 Vac, 45 to 440 Hz, or 90 to
150 Vdc. Low voltage models accept 20 to 40 Vdc supply. Changing the supply
voltage rating requires exchanging the unit for the properly rated control. The
high voltage model is identified as "115 Vac/125 Vdc" on the front of the control.
The low voltage model is identified as "24 Vdc" on the front of the control.
A listing of controls and applications is provided on page iv of this manual.
Speed Range
Speed range is set by an internal dip switch, available inside the steel cover of
the control. Speeds are set according to the sensor output frequency. 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 revolutions per minute of the sensing gear,
divided by 60.
60 RPMxteethofNo.
=Hz
Switch selectable speed ranges are:
500 to 1500 Hz
1000 to 3000 Hz
2000 to 6000 Hz
4000 to 12 000 Hz
The speed range selected should cover the operating speed range of the prime
mover.
Reverse Acting
Most reverse acting controls will operate Woodward EGB governor/actuators. In
reverse-acting systems, the actuator calls for more fuel when the actuator current
decreases. Complete loss of signal 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.
External wiring connections for reverse-acting controls are identical to those for
direct-acting controls. However, the 2301A must be exchanged should a control
need to operate the opposite type of actuator. Contact Woodward should it be
necessary to change the type of control.

Manual 82046 2301A LSSC with Dual Dynamics
Woodward 3
Start Fuel Limit
2301A Dual Fuel Controls include a start fuel limit which allows limiting the fuel
setting during start up. The start fuel limit feature may be disabled by a switch at
the terminal block. Start Fuel Limit Disable is especially desirable for use with
reverse acting controls.
Start-fuel limit should be disabled after start up when used with reverse-acting
controls. With loss of speed signal, the reverse acting control will position the
actuator at the start-fuel level if the failed-speed-signal override is activated.
Reverse-acting systems normally require the control to demand full fuel on loss
of speed signal to allow the mechanical backup governor to control the system.
The Start Fuel Limit can be deactivated by an auxiliary generator breaker contact
which will short terminal 31 to terminal 32. This CLOSE TO DISABLE START
FUEL LIMIT contact will disable the start fuel limit after the prime mover has
been started and the generator breaker closed.
References
The following Woodward publications contain additional product or installation
information on speed controls and related components. These publications are
available on the Woodward website (www.woodward.com).
Manual Title
26260 Governing Fundamentals and Power Management
25070 Electric Control Installation Guide
82384 SPM-A Synchronizer
82510 Magnetic Pickups and Proximity Switches for Electronic Controls
82514 Speed Setting Potentiometers
82343 Digital Reference Unit
Product Specification
82047 2301A Load Sharing & Speed Controls with Dual Dynamics
82383 SPM-A Synchronizer
82516 EG-3P/-6P/-10P Actuator
82575 EGB-1P/-2P Governor/Actuator

2301A LSSC with Dual Dynamics Manual 82046
4 Woodward
Chapter 2.
Installation
Unpacking
Before handling the control, read page ii, "Electrostatic Discharge Awareness".
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.
Notify the shipper of any damage.
Selection of Speed Range
A 4-pole mini-switch is located on the right-hand side of the printed circuit board.
This switch sets the controlling speed range as sensed by the MPU. The speeds
are related to the MPU frequency, which is proportional to engine RPM. The
control is shipped with Switch 3 on for 2000 to 6000 Hz. Switch 1 provides 500 to
1500 Hz, Switch 2 provides 1000 to 3000 Hz, and Switch 4 provides 4000 to
12 000 Hz. Select only one switch on to match the control to the MPU frequency.
Figure 2-1. Speed Range Switch
Power Requirements
High and low voltage models of 2301A Speed Controls are available.
Low voltage models require a supply of 20 to 40 Vdc, 15 watts maximum.
High Voltage models require a supply of 88 to 132 Vac or 90 to 150 Vdc., 15
watts maximum. The ac supply may be 45 to 440 Hz.
If a battery is used for operating power, an alternator or other battery charging
device is necessary to maintain a stable supply voltage.

Manual 82046 2301A LSSC with Dual Dynamics
Woodward 5
To prevent damage to the control, make sure that the alternator or
other battery-charging device is not connected to the control when
the battery is disconnected from the control.
Location Considerations
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.
Protection from excessive vibration.
An ambient operating temperature range of –40 to +85 °C (–40 to +185 °F).
Do not mount the control on the engine.
Electrical Connections
External wiring connections and shielding requirements for a typical control
installation are shown in the plant wiring diagram, Figures 2-3 and 2-4. These
wiring connections and shielding requirements are explained in the balance of
this chapter.
Shielded Wiring
All shielded cable must be twisted conductor pairs. Do not attempt to tin the
braided shield. All signal lines should be shielded to prevent picking up stray
signals from adjacent equipment. Connect the shields to the grounding terminal
indicated in the plant wiring diagram. Keep grounding connections under 6
inches (15 cm) length. Refer to local wiring codes for proper grounding methods.
Wire exposed beyond the shield should be as short as possible, not exceeding 2
inches (5 cm). 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 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 2-2.
1. Strip outer insulation from both ends, exposing the braided or spiral
wrapped shield. Do not cut the shield on the control end. Cut off the shield
on the end away from the 2301A control.
2. Use a sharp, pointed tool to carefully spread the strands of the shield.
3. Pull the inner conductors out of the shield. Twist braided shields to prevent
fraying.

2301A LSSC with Dual Dynamics Manual 82046
6 Woodward
4. Connect lugs to the shield and to the control wires. Number 6 slotted or
round crimp-on terminals are used for most installations. Connect the wires
to the appropriate terminals on the control.
Figure 2-2. Preparation of Shielded Cables
Installations with severe electromagnetic interference (EMI) may require shielded
wire run in conduit, double shielded wire, or other precautions. Contact
Woodward for additional information.
Power Sensing And Load Sharing Connections
The control is phase sensitive. If at all possible be certain of the
phase A, B, and C locations before wiring the control. The method of
correcting an incorrectly wired control is time consuming and can be
avoided only by having the correct wiring of the three phases from
the beginning.
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
volt RMS range. Refer to the plant wiring diagram, Figures 2-3 and 2-4.
Current Transformer Connections
The standard method of connecting the current transformers is shown in the
plant wiring diagram, Figure 2-3. An alternate method is the open delta
connection shown in Figure 2-4 of the plant wiring diagram.
The current transformers should be sized to provide 5 amps secondary current
when the generator is at full load. A minimum of 3 amps and a maximum of 7
amps secondary current is necessary for proper load sharing operation.

Manual 82046 2301A LSSC with Dual Dynamics
Woodward 7
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 the 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. 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. If the droop contact is open, the control
remains in the droop mode, even when the circuit-breaker auxiliary contact is
closed.
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.
Droop operation is required when the generator is paralleled with an infinite bus
without a Generator Loading Control, Process Import/Export Control, Automatic
Power Transfer and Load 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
Load controlling accessory, terminal 14 must be connected to terminal 16
(terminal 0 on high-voltage controls) to connect the Load Control Circuit to the
load-sharing lines. The load-sharing lines must be wired to the load control
accessory's output. The utility feeder's circuit-breaker auxiliary contact would be
connected to the load-control accessory to activate it only when the utility is
present. when the utility is lost, the generator is then controlled in the
isochronous mode at the rated frequency, carrying the plant load (if within the
generator capability).
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.
Do NOT apply power to the control at this time. A powered up control
could allow the prime mover to start before control functions are
operational. This could allow a dangerous overspeed which can
endanger life, even causing death and which can damage the
physical equipment.

2301A LSSC with Dual Dynamics Manual 82046
8 Woodward
External Adjustments
External Speed Trim
A speed trim potentiometer or digital reference unit is connected to terminals 23
and 24. Use a high quality 100 ohm, 10-turn potentiometer (Woodward part
1657-537 or equivalent) to provide about ±5% speed adjustment. The wires to
terminals 23 and 24 must be shielded. Connect the shield to terminal 22.
Terminals 23 and 24 must be jumpered if the speed trim potentiometer or digital
reference unit is not used. The 2301A control will have a jumper installed in the
factory and this must be removed if a speed-trim device is used.
Switch Options
Minimum Fuel Contact
The minimum-fuel contact between terminals 16 and 17 on the low-power
models and 0 and 17 on the high-power models is intended as an optional
means for a normal shutdown of the prime mover. The contact is connected as
shown on the plant wiring diagram for the particular control. If a minimum fuel
contact is not used, the terminals must be permanently jumpered.
Do NOT use the minimum-fuel contact as a part of any emergency
stop sequence. The emergency may be caused by a governor
malfunction which would also cause a malfunction of the minimum-
fuel feature. Use of the minimum-fuel contact for an emergency stop
sequence could cause overspeed of the prime mover and mechanical
damage and personal injury, including death.
Failed Speed Signal Override
Circuits in the 2301A Speed Control constantly monitor the signal from the MPU.
Should this signal be below a minimum threshold, the control sends a minimum
fuel signal to the actuator (maximum fuel signal on a reverse acting control).
Before start-up of the prime mover, the speed signal is nonexistent, activating the
failed speed signal circuit. On units with cranking motors, the cranking speed is
usually sufficient to provide a speed signal, so an override contact is not needed
for starting. On some steam turbine systems, the Close for Override of Failed
Speed Signal contact must be closed to allow the actuator to open the valve for
starting.
The failed speed-signal override switch should be a momentary switch so the
failed-speed-sensor circuit will be enabled after start-up. (The failed speed-signal
override should be left closed on reverse acting systems if auto transfer to the
ballhead is required.)

Manual 82046 2301A LSSC with Dual Dynamics
Woodward 9
Idle/Rated Ramp Contact
Connect a single-pole, single-throw switch between terminal 19 and terminal 16
(terminal 0 on high-voltage controls) as shown on the appropriate plant-wiring
diagram. Close the contact for rated speed, open for idle. Oil pressure is often
used to close this contact. When closed the control ramps up to rated speed.
When the contact is open the prime mover's speed ramps down to idle.
When a ramp time potentiometer is full cw the ramp time from idle to rated or
rated to idle is 22 ±4 seconds. When a ramp time potentiometer is fully ccw the
ramp rate is less than 1 second from idle to rated or rated to idle.
Ramp times are adjusted by setting the RAMP TIME ACCEL and RAMP TIME
DECEL potentiometers.
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 to any other point. The shield must have continuity the entire distance
to the actuator and must be insulated from all other conductors.
Electromagnetic Interference (EMI) can be an intermittent condition.
Improperly shielded installations can provide good control for a
while and then cause problems. For this reason it is important to be
sure all shields are properly installed.
Speed and Phase Matching With an SPM-A Synchronizer
Connect the SPM-A (optional equipment) wires to terminals 25 (+/–) and 26
(com). Use shielded wire and connect the shield to terminal 27.
Speed Sensor
Connect a speed-sensing device (a magnetic pickup (MPU) is normally used) to
terminals 28 and 29. No polarity is observed. Use shielded wire and connect the
shield only at terminal 27. The shield must have continuity the entire distance to
the MPU. The shield is to be insulated from all other conductors and from the
MPU.
Dual Dynamic Contact
Connect a single-pole, single-throw switch from terminal 30 to terminal 31, the
Close To Enable Second Dynamics Terminal.
For dual fuel applications, when switching from the primary fuel to the alternate
fuel, the contact between terminals 30 and 31 should be closed at the time of the
transfer.
In applications where the response time of the prime mover changes between no
load and loaded conditions an auxiliary generator-breaker contact is often used.

2301A LSSC with Dual Dynamics Manual 82046
10 Woodward
Start Fuel Limit Disable Contact
Connect a single-pole, single-throw switch between terminals 31 and 32, the
Close To Disable Start Fuel Limit Terminal (Optional).
An auxiliary generator breaker contact should be used if the Start-Fuel Limit
Disable function is used. The auxiliary generator breaker will enable the START
FUEL LIMIT during start up, but will disable it after the generator is on line.
For reverse acting controls that utilize the START FUEL LIMIT, the disable
contact MUST be used. This will assure that in case of an electronic failure the
mechanical ball head will not be prevented from controlling the engine.
Installation Checkout Procedure
When the installation is completed perform the following checkout 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
Manual 25070, Electric Governor Installation Guide, for additional
information on linkage.
The actuator lever should be near, but not at, the minimum position
when the fuel or steam rack is at the minimum position. This could
avoid a dangerous condition caused by an engine which will not shut
down.
b. Check for correct wiring according the plant-wiring diagram. (Figures
2-3 and 2-3a.)
c. Check for broken terminals and loose terminal screws. Make sure all
terminal lugs are carefully and correctly installed. (Incorrectly installed
crimp-on terminals can cause governor failure.)
d. Check the speed sensor (MPU) for visible damage. Check the
clearance between the gear and the sensor, and adjust if necessary.
See Manual 82510, Magnetic Pickups and Proximity Switches for
Electronic Controls.
2. Check for Grounds.
With the power off, check for grounds by measuring the resistance between
each terminal and the grounding bolt located below terminal 12. The
readings should be infinity except for terminals 12, 22 and 27 (shields).
Check for additional grounds by measuring the resistance from terminal 11
to terminal 15. The resistance should be infinity. If a resistance other than
infinity is obtained, remove the connections from each terminal, one at a
time, until the resistance is removed. d Check the line that was removed last
to locate the fault.

Manual 82046 2301A LSSC with Dual Dynamics
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Figure 2-3. Plant Wiring Diagram

2301A LSSC with Dual Dynamics Manual 82046
12 Woodward
Figure 2-4. Plant Wiring Diagram and Optional Connections

Manual 82046 2301A LSSC with Dual Dynamics
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Figure 2-5. Outline Drawing of 2301A Speed Control With Dual Dynamics

2301A LSSC with Dual Dynamics Manual 82046
14 Woodward
Chapter 3.
Operation and Adjustment
Initial Pre-Start Settings
Overspeed with resultant equipment damage, personal injury, or
death is possible when setting up a control system. Read this entire
procedure before starting the prime mover for the first time.
1. RATED SPEED
a. Set the 10-turn RATED SPEED potentiometer to minimum (fully
counterclockwise).
b. Set the external SPEED TRIM, if used, to mid-position.
2. RESET 1--Set the 1-turn pot at mid-position.
3. RESET 2--Set the 1-turn pot at mid-position.
4. GAIN 1--Set the 1-turn pot at mid-position.
5. GAIN 2--Set the 1 turn pot at mid-position.
6. ACTUATOR COMPENSATION (both 1 and 2 are 1 turn pots).
a. DIESEL, GAS TURBINE, FUEL-INJECTED GASOLINE PRIME
MOVERS: Set the ACTUATOR COMPENSATION potentiometer at 2
on the 0 to 10 scale.
b. CARBURETED GAS OR GASOLINE or STEAM TURBINE PRIME
MOVERS: Set the ACTUATOR COMPENSATION potentiometer at 6
on the 0 to 10 scale.
7. ACCEL RAMP TIME--Set the 1-turn pot at maximum (fully clockwise).
8. DECEL RAMP TIME--Set the 1-turn pot at maximum (fully clockwise). (Set
fully counterclockwise if deceleration time is not required.
9. LOW IDLE SPEED--Set the 10-turn pot at maximum (fully clockwise).
10. LOAD GAIN--Set the 1-turn pot at maximum (fully clockwise).
11. DROOP--Set the 1-turn pot at minimum (fully counterclockwise).
12. START FUEL LIMIT--Set the 1-turn pot at maximum (fully clockwise).
13. Be sure the actuator is connected to terminals 20 (+) and 21 (–).
14. Open the switch between terminals 30 and 31 to select first dynamics.
Be sure the speed range switch is set on the right speed range for
your application as described in Chapter 2.