Woodward ProTech 203 User manual

Installation and Operation Manual
ProTech®203
Overspeed Protection System
9907-146, -147, -148, -149, -150, -151
Manual 85204 (Revision G)

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.
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.
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.
This publication may have been revised o
r
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.
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.
To prevent damage to a control system that uses an alternator or batter
y
-charging
device, make sure the charging device is turned off before disconnecting the battery
from the system.
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.
Revisions—Text changes are indicated by a black line alongside the text.
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 1997
All Rights Reserved

Manual 85204 ProTech 203 Overspeed Protection System
Woodward i
Contents
ELECTROSTATIC DISCHARGE AWARENESS ..................................................III
REGULATORY COMPLIANCE ....................................................................... IV
CHAPTER 1. GENERAL INFORMATION...........................................................1
Description..............................................................................................................1
Applications ............................................................................................................1
References .............................................................................................................2
CHAPTER 2. INSTALLATION..........................................................................3
Unpacking...............................................................................................................3
Power Requirements ..............................................................................................3
Location Considerations .........................................................................................3
Shielded Wiring ......................................................................................................3
Plant Wiring ............................................................................................................4
Installation Check-out Procedure ...........................................................................4
CHAPTER 3. DESCRIPTION...........................................................................7
Specifications .........................................................................................................7
Modes of Operation ..............................................................................................10
Power Supply Description ....................................................................................11
CHAPTER 4. CONFIGURATION AND OPERATION..........................................13
Programming ........................................................................................................15
ProTech 203 Programming Worksheet ................................................................16
Operation..............................................................................................................17
CHAPTER 5. TROUBLESHOOTING AND USER REPAIRS................................21
Troubleshooting....................................................................................................21
User Repairs.........................................................................................................23
CHAPTER 6. SERVICE OPTIONS .................................................................28
Product Service Options.......................................................................................28
Woodward Factory Servicing Options ..................................................................29
Returning Equipment for Repair...........................................................................30
Replacement Parts ...............................................................................................30
Engineering Services............................................................................................31
How to Contact Woodward...................................................................................31
Technical Assistance............................................................................................32
DECLARATIONS.........................................................................................33

ProTech 203 Overspeed Protection System Manual 85204
ii Woodward
Illustrations and Tables
Figure 2-1. Plant Wiring Diagram ...........................................................................5
Figure 2-2. Routing and Stress Relief for Field Wiring Entering the ProTech 203
System ...............................................................................................6
Figure 3-1. Outline Drawing of ProTech 203 System.............................................7
Figure 3-2. Interposing Relay Field Wiring ...........................................................10
Figure 3-3. Voter Relay Configuration..................................................................11
Figure 3-4. Block Diagram of One Unit of the ProTech 203 System....................12
Figure 4-1. ProTech 203 Front Panel...................................................................13
Figure 4-2. Method 1 Block Diagram....................................................................17
Figure 4-3. Method 2 Block Diagram....................................................................18
Figure 5-1. ProTech System Front Door ..............................................................24
Figure 5-2. Unit Covers Inside the ProTech Device.............................................24
Figure 5-3. Board Locations .................................................................................26
Figure 5-4. Display Boards ...................................................................................27
Table 1-1. De-energize-to-Trip ProTech Models....................................................2
Table 1-2. Energize-to-Trip ProTech Models .........................................................2
Table 1-3. Voltage Ranges.....................................................................................2
Table 4-1. Allowable Ranges................................................................................14
Table 4-2. Start Mode Options .............................................................................19
Table 4-3. Trip Causes .........................................................................................20
Table 5-1. Power Supply Fuse Data ....................................................................23

Manual 85204 ProTech 203 Overspeed Protection System
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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.
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.

ProTech 203 Overspeed Protection System Manual 85204
iv Woodward
Regulatory Compliance
The ProTech 203 is suitable for use in Class I, Division 2, Groups A, B, C, and D
per UL for Canada and US or non-hazardous locations only.
The ProTech 203 is suitable for use in European Zone 2, Group II environments
per compliance with EN60079-15, Electrical apparatus for explosive
atmospheres – Type of protection ‘n’.
Wiring must be in accordance with North American Class I, Division 2 or
European Zone 2 wiring methods as applicable, and in accordance with the
authority having jurisdiction.
European Compliance for CE Marking
These listings are limited only to those units bearing the CE Marking.
EMC Directive: Declared to 89/336/EEC COUNCIL DIRECTIVE of
03 May 1989 on the approximation of the laws of the
Member States relating to electromagnetic
compatibility.
Low Voltage Declared to 73/23/EEC COUNCIL DIRECTIVE of 10
Directive: February 1973 on the harmonization of the laws of
the Member States relating to electrical equipment
designed for use within certain voltage limits.
ATEX – Potentially Declared to 94/9/EEC COUNCIL DIRECTIVE of 23
Explosive March 1994 on the approximation of the laws of the
Atmospheres Member States concerning equipment and
Directive: protective systems intended for use in potentially
explosive atmospheres.
EEx nA II T4
North American Compliance
These listings are limited only to those units bearing the UL agency identification.
UL: UL Listed for Class I, Division 2, Groups A, B, C, and
D, T4A at 60 °C Ambient. For use in Canada and the
United States.
UL File E156028
EXPLOSION HAZARD—Do not remove covers or connect/disconnect
electrical connectors unless power has been switched off or the area
is known to be non-hazardous.
Substitution of components may impair suitability for Class I,
Division 2.
RISQUE D’EXPLOSION—Ne pas enlever les couvercles, ni
raccorder / débrancher les prises électriques, sans vous en
assurez auparavant que le système a bien été mis hors
tension; ou que vous vous situez bien dans une zone non
explosive.
La substitution de composants peut rendre ce matériel
inacceptable pour les emplacements de Classe I, Division 2.

Manual 85204 ProTech 203 Overspeed Protection System
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Chapter 1.
General Information
This manual describes the ProTech®electronic two-out-of-three Overspeed
Protection System. The manual explains the operation and gives the
configuration procedures for the system. This manual does not contain
instructions for the operation of the complete turbine system. For turbine- or
plant-operating instructions, contact the plant-equipment manufacturer.
Before doing any installation, maintenance, adjustments, or configuration on the
ProTech 203 system, read manual 82715, Guide for Handling and Protection:
Electronic Controls, Printed Circuit Boards, Modules.
Description
The ProTech 203 Overspeed Protection System is a digital overspeed trip device
that senses prime mover speed through three magnetic pickups (MPUs). It
consists of three identical, independent, speed-sensing units which continuously
monitor prime mover speed and activate a trip relay when an overspeed
condition is detected. The trip relays of the three units are connected in a two-
out-of-three voting configuration so that if any single unit fails, the ProTech
system will still provide the correct output. The units' functions include the ability
to display the actual speed from each speed probe, display the highest speed
signal, on-line testing, and modular design that allows a single failed unit to be
replaced while the device is running. Light emitting diodes (LEDs) and digital
displays on the unit front panel indicate the functional status.
Applications
The ProTech system can be ordered in either a de-energize-to-trip model or an
energize-to-trip model.
Woodward strongly recommends use of the de-energize-to-trip
model for reasons of general safety. With an energized-to-trip model,
the prime mover may not trip on loss of power. That failure to trip
may result in property damage or personal injury and loss of life.
However, Woodward recognizes that some applications will require
the energize-to-trip option.
Because Woodward recognizes that some installations will use energized-to-trip
models, all ProTech systems have been designed with components of the
highest quality and relays with operating characteristics that far exceed the
anticipated requirements of the device.
The ProTech system can also be configured to be compatible with various
combinations of power sources. Tables 1-1, 1-2, and 1-3 show the available
ProTech models, the corresponding part numbers, and the voltage ranges.

ProTech 203 Overspeed Protection System Manual 85204
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Table 1-1. De-energize-to-Trip ProTech Models
Part No. UNIT
A
UNIT B UNIT C
9907-147 24 Vdc 24 Vdc 24 Vdc
9907-149 120 Vac/dc 120 Vac/dc 120 Vac/dc
9907-151 220 Vac 220 Vac 220 Vac
Table 1-2. Energize-to-Trip ProTech Models
Part No. UNIT
A
UNIT B UNIT C
9907-146 24 Vdc 24 Vdc 24 Vdc
9907-148 120 Vac/dc 120 Vac/dc 120 Vac/dc
9907-150 220 Vac 220 Vac 220 Vac
Table 1-3. Voltage Ranges
Input Power Requirements Per Kernel
24 Vdc = 18–32 Vdc, 5.12 W
120 Vac/dc = 88–132 Vac, 12.5 VA
90–150Vdc, 4.77 W
220 Vac = 180–264 Vac, 16.4 VA
References
The following Woodward publications contain additional product or installation
information on overspeed protection systems and related components.
82715 Guide for Handling and Protection: Electronic Controls, Printed
Circuit Boards, Modules
82510 Magnetic Pickups and Proximity Switches for Electronic Governors
50532 EMI Control for Electronic Governing Systems

Manual 85204 ProTech 203 Overspeed Protection System
Woodward 3
Chapter 2.
Installation
Unpacking
Be careful when unpacking the ProTech®203 system. Check the device for signs
of damage such as a bent or dented case and loose or broken parts. If damage
is found, notify the shipper immediately. The device may be stored in its original
shipping container until it is ready for installation. Protect the device from weather
and from extreme humidity or temperature fluctuations during storage.
Power Requirements
The ProTech 203 system can be configured to operate with numerous power
sources. Each unit contains an independent power supply module that can be
ordered in the configurations described in Tables 1-1, 1-2, and 1-3 in Chapter 1.
Each power supply must be provided with an external disconnecting
means that is identifiable to the specific power supply (A, B, or C).
Location Considerations
Carefully study this chapter before choosing a location for the ProTech 203
system. Wiring and grounding considerations may influence the selection of a
location for the device.
Consider the following general requirements when selecting the location:
•Adequate ventilation for cooling
•A location that will provide an operating temperature range of –25 to +60 °C
(–13 to +140 °F)
•Space for servicing
•Protection from direct exposure to sunlight, water, or to a condensation-
prone environment
•Protection from high-voltage or high-current devices which produce
electromagnetic interference
•Avoidance of vibration
Field wiring is provided to reset the device from a remote location.
Shielded Wiring
All shielded cable must be twisted conductor pairs with either a foil or a braided
shield. All signal lines should be shielded to prevent picking up stray signals from
adjacent equipment. Connect the shields as shown in the plant wiring diagram
(Figure 2-1), and install a wire (0.3–0.4 mm²/12–22 AWG) from terminal 13 to
terminal 3 on each unit. Wire exposed beyond the shield must not exceed 50 mm
(2 inches). The other end of the shield must be left open and insulated from any
other conductor. Do not run shielded signal wires with other wires carrying large
currents. See manual 50532, EMI Control in Electronic Governing Systems, for
more information.

ProTech 203 Overspeed Protection System Manual 85204
4 Woodward
Installations with severe electromagnetic interference (EMI) may require shielded
cable run in conduit, double shielded wire, or other precautions. Contact
Woodward for more information.
Plant Wiring
Figure 2-1 is the plant wiring diagram for the ProTech 203 system. Figure 2-2
shows the proper routing and stress relief for all field wiring entering the ProTech
system. Field wiring to the ProTech system should be between 1.5 and 6 mm²
(10 and 16 AWG) wire for the power supplies and between 0.3 and 4 mm² (12
and 22 AWG) for all other I/O runs.
The ground wires for the power supplies of all three units must be
connected to the identified PE ground terminal on the chassis.
Additionally, the ground wire for each power supply must also be
connected to the applicable connector.
HIGH VOLTAGE—When wiring the interposing relays, be sure to wire
both contacts with the same polarity. Failure to do so will create a
potential shock hazard and therefore possible injury or death.
If the ProTech 203 system is being installed in a hazardous environment, please
attend to the following warnings:
EXPLOSION HAZARD—Substitution of components may impair
suitability for Class 1, Division 2.
Do not disconnect equipment unless power has been switched off or
the area is known to be non-hazardous.
All input and output wiring must be in accordance with Class I
Division 2 wiring methods, and in accordance with the authority
having jurisdiction.
All peripheral equipment must be suitable for the location in which
they are being used.
Installation Check-out Procedure
When installation is completed, perform the following check-out procedure before
powering up the device.
1. Visual inspection
a. Ensure that all mounting hardware is tightened and that no wires or
cables are pinched.
b. Check for correct wiring according to the plant wiring diagram.
c. Check for broken terminals or loose terminal screws. Ensure that all
ribbon cables are fully seated and clamped in place.
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 Governors.

Manual 85204 ProTech 203 Overspeed Protection System
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Figure 2-1. Plant Wiring Diagram
2. Check for ground
3. Actuating equipment integration assessment: Woodward strongly
recommends that the user perform an assessment of the actuating
equipment that will receive input from the ProTech 203 system to verify that
equipment is properly calibrated, working correctly, properly interfaced, and
functioning safely before energizing the ProTech 203 system.
If the actuating equipment assessment is not performed and
consequently problems are not identified and eliminated, turbine
damage can occur with possible personal injury and loss of life to
personnel near the turbine.

ProTech 203 Overspeed Protection System Manual 85204
6 Woodward
Figure 2-2. Routing and Stress Relief for Field Wiring Entering the ProTech 203
System

Manual 85204 ProTech 203 Overspeed Protection System
Woodward 7
Chapter 3.
Description
The ProTech®203 Overspeed Protection System is a digital overspeed trip
device that reads three individual magnetic pickups, performs three individual
speed calculations, and actuates its relay output according to the results of a
hardware two-out-of-three vote. See Figure 3-1 for the control layout and
dimensions.
Figure 3-1. Outline Drawing of ProTech 203 System
Specifications
Enclosure
Approved for use in Type 4 and 4x environments for North America. Enclosure
rated IP54 for Europe.

ProTech 203 Overspeed Protection System Manual 85204
8 Woodward
Remote Reset
Can be reset from a remote location
The external field wiring to the Remote Reset and Contact Input
terminals must be protected from user accessibility. It must be hard-
wired like a hazardous voltage circuit.
Contact Input
Depending on how the unit is configured, this input can act as a remote start
input, or as an indication to the ProTech system that it should be sensing speed
greater than the MPU fail set point.
Built-In Self-Test
A built-in frequency generator permits testing of each unit individually while prime
mover is on-line
Key Lock
Prevents any programming or testing by unauthorized personnel
Replacement
Each subsystem can be replaced (after disconnecting the supply power at the
external disconnecting means) while the other two subsystems are powered
without tripping the prime mover
Outputs
A separate alarm output and LED indicate if an individual speed-sensing unit has
tripped
MPU Failure Indications
Separate LEDs indicate if an MPU or its wiring has failed
MPU Fail Timer
A timer is provided for start-up; if prime mover speed is not up to the value
programmed when this timer times out, the device will trip the prime mover. Both
the time and the speed are programmable
MPU Fail Option
Each unit can be configured so that on the sudden loss of that unit's MPU, the
unit can either output both an alarm plus a trip signal, or the unit can output only
an alarm
CPU Failure Indication
A separate LED indicates if any unit's CPU is not operating normally
Speed-Sensing Frequency Range
100 Hz to 32 kHz
Trip-Point Frequency Range
250 Hz to 25 kHz
MPU Input Amplitude
1 Vrms minimum @ 100 Hz to 25 kHz
2 Vrms minimum @ 25 kHz to 32 kHz
maximum 25 Vrms

Manual 85204 ProTech 203 Overspeed Protection System
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Shutdown Contact Ratings
European Ratings
European ratings restrict use to applications with voltages not subject to the Low
Voltage Directive (73/23/EEC).
Rated Voltage Resistive Inductive Tungsten Moto
r
28 Vdc 10.0 A 1 A 1.0 A 3.0 A
<50 Vrms 50/60 Hz 3.0 A 2.0 A 0.5 A 1.5 A
<75 Vdc —0.22 A — —
UL Ratings
Rated Voltage Resistive Inductive Tungsten Moto
r
28 Vdc 10.0 A 1 A 1.0 A 3.0 A
115 Vrms 50/60 Hz 3.0 A 2.0 A 0.5 A 1.5 A
125 Vdc —0.22 A — —
Alarm Contact Ratings
European Ratings
European ratings restrict use to applications with voltages not subject to the Low
Voltage Directive (73/23/EEC).
Rated Voltage Resistive
28 Vdc 2.0 A
<50Vrms, 50/60 Hz 0.3 A
UL Ratings
Rated Voltage Resistive
28 Vdc 2.0 A
115Vrms, 50/60 Hz 0.3 A
The alarm relay de-energizes when a trip occurs, and momentarily
after reset or power-up. An alarm only annunciates a situation that
may require attention, it is not synonymous with a trip.
MPU Measurement Circuit Input Impedance
2 kΩ
Accuracy
±(0.05% x Trip Point in Hz +2 Hz)
Operating Temperature
–25 to +60 °C (–13 to +140 °F)
Display Operating Temperature
–15 to +60 °C (+5 to +140 °F)
Sample Time
Speed is sampled every 5 milliseconds
Total Response Time
40 ms max
Humidity
US MIL-STD-810D, Method 507.2, Procedure II

ProTech 203 Overspeed Protection System Manual 85204
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Vibration
US MIL-STD-810D, Method 516.3, Procedure I
Weight
7.3 kg (16 lbs)
Modes of Operation
The ProTech 203 system is offered in de-energize-to-trip versions and energize-
to-trip versions. Two normally open and two normally closed relay contacts are
provided by the system for use in either version. Figure 3-2 shows the relay field
wiring diagram that describes these options.
Figure 3-2. Interposing Relay Field Wiring
In the de-energize-to-trip version, the interposing relay is in its energized state
during normal operation. TB3 terminals 1 and 2 are connected, and TB2
terminals 4 and 5 are connected. During an overspeed trip event, or when power
to the ProTech 203 system is lost, the interposing relay is de-energized. Then
TB3 terminals 2 and 3 are connected, and TB2 terminals 5 and 6 are connected.
In the energize-to-trip version, the interposing relay is in its de-energized state
during normal operation. TB3 terminals 2 and 3 are connected, and TB2
terminals 5 and 6 are connected. Only during an actual overspeed trip event is
the interposing relay energized. Then TB3 terminals 1 and 2 are connected, and
TB2 terminals 4 and 5 are connected.
In the energize-to-trip version, if input power to the ProTech 203
system is lost, the interposing relay will not actuate, and TB3
terminals 2 and 3 and TB2 terminals 5 and 6 will remain connected.
The ProTech 203 system utilizes three separate speed-sensing units that are
interfaced to three individual magnetic pickups (MPUs). Each speed sensing unit
(A, B, and C) actuates two voter relays that are internally wired in a six relay
series/parallel configuration. This six-relay configuration drives the interposing
relay shown in Figure 3-3.
Whenever two of the three speed-sensing circuits sense an overspeed condition,
the voter relay configuration will change state, causing a turbine trip. It should be
noted, however, that a single MPU or circuit failure will not cause an inadvertent
trip.

Manual 85204 ProTech 203 Overspeed Protection System
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Figure 3-3. Voter Relay Configuration
This configuration makes testing of the voter relays in the system a relatively
simple operation. Six relay status indicator LEDs (STATUS A1, STATUS A2,
STATUS B1, STATUS B2, etc.) are mounted on the control panel. Each LED is
on when its corresponding relay is tripped. You may overspeed each of the three
speed-sensing circuits, one at a time, using a built-in frequency generator. You
may then watch the LED indicators and the speed readout to see that each of the
six individual voter relays trip at the correct speed. Because of the series/parallel
configuration of the trip relays, overspeeding one of the speed sensing circuits at
a time will not disturb the load.
Operator Interface
Each speed-sensing unit of the ProTech 203 system includes a touchpad, a
two-line by 16-character LCD display, and a potentiometer for adjusting the
overspeed test frequency. A single keyswitch is connected to all three speed-
sensing units to control whether the system is in the MONITOR or the
PROGRAM mode, preventing unauthorized changes.
Power Supply Description
The ProTech 203 consists of three units (A, B, and C). Each unit has its own
separate power supply. There are three different versions of power supplies
which have the following input voltages: 18–32 Vdc, 90–150 Vdc/88–132Vac,
and 180–264 Vac.
Each unit power supply produces +5 V and +24 V. These voltages are isolated
from the input voltage. The +24 V for all three units are "or-ed" together to
provide power to the interposing relay.

ProTech 203 Overspeed Protection System Manual 85204
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Figure 3-4. Block Diagram of One Unit of the ProTech 203 System

Manual 85204 ProTech 203 Overspeed Protection System
Woodward 13
Chapter 4.
Configuration and Operation
Figure 4-1. ProTech 203 Front Panel
The ProTech®203 system can be operated in one of two modes, MONITOR or
PROGRAM. Although the system will "run" in either mode, it is recommended
that the unit be placed in the PROGRAM mode only during configuration and
then placed in the MONITOR mode during normal operation.
The menu key on the touch pad selects which of the following parameters to
display:
•PRESENT SPEED
•PEAK SPEED
•TRIP SPEED SETPOINT
•MPU FAILED SETPOINT
•MPU FAILED TIMEOUT
•MPU GEAR TEETH
•TRIP ON MPU FAILURE OPTION
•TIMER STARTS ON RESET OPTION
•ALARM WHEN SPEED IS <MPU FAILED SETPOINT OPTION
•LAMP TEST
•TRIP CAUSE (if applicable)

ProTech 203 Overspeed Protection System Manual 85204
14 Woodward
PRESENT SPEED is the first parameter displayed. Each subsequent press of
the menu key displays the next parameter in the list. Appropriate descriptive units
for each parameter are also displayed. When the keyswitch is in the MONITOR
position, the CURSOR RIGHT, ADJ UP, and ADJ DOWN keys have no effect.
When the keyswitch is in the PROGRAM position, an annunciator appears in the
display, and a cursor appears if a tunable parameter is being displayed. The
tunable parameters are:
•TRIP SPEED SETPOINT
•MPU FAILED SETPOINT
•MPU FAILED TIMEOUT
•MPU GEAR TEETH
•TRIP ON MPU FAILURE
•TIMER STARTS ON RESET
•ALARM IF SPEED IS <MPU FAILED SETPOINT
If any tunable parameters are changed, the LCD displays CHANGES SAVED for
two seconds when the keyswitch is returned to the MONITOR mode.
The CURSOR RIGHT, ADJ UP, and ADJ DOWN keys perform as follows in the
PROGRAM mode:
CURSOR RIGHT—Moves the cursor one position to the right.
ADJ UP, ADJ DOWN—For integer values, these keys increase/decrease the
displayed value by the power of ten indicated by the cursor position. For
example, if the cursor were under the "0" of the value 5014 and the ADJ DOWN
key were pressed, the value would change to 4914.
For a time display in minutes and seconds, increase/decrease the displayed
value by the number of seconds or minutes indicated by the cursor position. For
example, if the cursor were under the "4" in 1 MIN 47 SEC and the ADJ UP key
were pressed, the value would change to 1 MIN 57 SEC. If the ADJ UP were
pressed again, the value changes to "2 MIN 07 SEC".
For a YES/NO value, pressing either ADJ UP or ADJ DOWN causes the value to
toggle to the opposite value.
Pressing and holding the ADJ UP or the ADJ DOWN key causes the value, after
a short delay, to change at a fixed rate.
If changing a value would cause it to exceed predetermined limits, no change
takes place. Table 4-1 gives the allowable range for each tunable parameter.
Table 4-1. Allowable Ranges
Tunable Minimum Maximum
Trip Speed Set Point 250 rpm 25 000 rpm
MPU Failed Set Point 100 rpm 25 000 rpm
MPU Failed Timeout 1 sec 533 min 20 sec
MPU Gear Teeth 20 120