Woodward EPG 512 Installation And Operation Manual
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Woodward EPG 512 Installation And Operation Manual

Woodward EPG 512 Installation And Operation Manual

Electrically powered governor isochronous standard, start fuel limit, dual dynamics ul listed e97763
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Installation and Operation Manual
EPG Electrically Powered Governor
Isochronous Models 512/524 and 1712/1724
Standard, Start Fuel Limit, Dual Dynamics
UL Listed E97763
Manual 82493 (Revision R)

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  • Page 1 Installation and Operation Manual EPG Electrically Powered Governor Isochronous Models 512/524 and 1712/1724 Standard, Start Fuel Limit, Dual Dynamics UL Listed E97763 Manual 82493 (Revision R)
  • Page 2 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.

  • Page 3: Table Of Contents

    ECLARATIONS Illustrations and Tables Figure 1-1. Basic Electrically Powered Governor System ........4 Figure 1-2. Outline Drawing for EPG 512/1712 and 524/1724 Speed Controls ..5 Figure 1-3. Outline Drawing for EPG 1712/1724 and 512/524 Actuators....5 Figure 2-1. Typical Installation Kit ................6 Figure 2-2.

  • Page 4: Electrostatic Discharge Awareness

    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. Woodward...

  • Page 5: Chapter 1. General Information

    General Information Introduction This manual covers Electrically Power Governor (EPG) models 512/524 and 1712/1724. Refer to the appropriate manual or contact Woodward for information about other versions of the EPG. Application The EPG is used to control the speed of diesel, gas, and gasoline engines. It can also control the speed of gas turbines.
  • Page 6 Gasoline or Gas Engine 8290-070 8290-074 8290-045 8290-078 (24 V) 8256-016 Diesel or Gas Turbines w/ (1724) ** 8290-142 Dual Dynamics (24 V) *—These part numbers are EU Directive compliant. **—These part numbers are UL/cUL Listed. Table 1-1. Part Number Selection Table Woodward...

  • Page 7: Accessories

    See the typical wiring diagram for capacitor requirements. References These publications can be obtained from your Woodward authorized Distributor or AISF (Authorized Independent Service Facility). All are also available on the Woodward website (www.woodward.com).

  • Page 8: Figure 1-1. Basic Electrically Powered Governor System

    EPG Electrically Powered Governor Manual 82493 Figure 1-1. Basic Electrically Powered Governor System Woodward...

  • Page 9: Figure 1-2. Outline Drawing For Epg 512/1712 And 524/1724 Speed Controls

    Manual 82493 EPG Electrically Powered Governor Figure 1-2. Outline Drawing for EPG 512/1712 and 524/1724 Speed Controls (Do not use for construction.) Figure 1-3. Outline Drawing for EPG 1712/1724 and 512/524 Actuators (Do not use for construction.) Woodward...

  • Page 10: Chapter 2. Installation, Checkout, And Calibration

    General Custom installation kits, including actuator mounting hardware, linkage, and actuator wiring harness, are available for some specific engines. Contact Woodward for more information. 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.

  • Page 11: Figure 2-2. Linear Linkage

    Match the actuator’s direction of rotation for increased fuel with the fuel control’s direction of rotation for increased fuel by choosing a suitable linkage. If you are using a Woodward supplied installation kit, follow its instructions and skip over Linkage Compatibility. Begin again with Installing the Magnetic Pickup.

  • Page 12: Wiring Instructions

    Wiring Instructions Use a wiring diagram for the specific part number of your EPG system to make all wiring connections. The wiring diagram is available from Woodward. Typical wiring is shown in Figure 2-5. Make all connections using insulated terminals. The wiring from actuator to speed control and from the battery to the speed control must be as short as possible.

  • Page 13: Figure 2-5. Typical Epg (Lsochronous) Wiring Diagram

    CAUTION—POWER WIRES Connect power wires directly to the battery terminals. The speed control can be damaged if these wires are connected to distribution points. See Figure 2-6. Figure 2-5. Typical EPG (lsochronous) Wiring Diagram (Do not use for construction.) Woodward...

  • Page 14: Figure 2-6. Correct And Incorrect Wiring To Battery

    Each shield must be given its own pin or terminal and be kept insulated from nearby wires and metal conductors. Do not tin (solder) braided shields. Connect the speed control chassis to system ground ( Woodward...

  • Page 15: Figure 2-7. Typical Wiring To 2500 Ramp Generator

    Install appropriate voltage selection jumpers at terminals 17 through 20. Refer to Manual 82313, Generator Load Sensor 8290-048, for load sensor information. Contact Woodward before connecting anything other than the 8290-048 Load Sensor to terminals 11 and 12 of the EPG Speed Control. Woodward...

  • Page 16: Figure 2-8. Additional Wiring To Install The Epg Load Sensor

    EPG Electrically Powered Governor Manual 82493 Figure 2-8. Additional Wiring to Install the EPG Load Sensor (for paralleled generator applications) Woodward...

  • Page 17: Installation Checks

    5 and 6. Connect the signal generator to terminals 5 and 6. Set the output between 2 and 10 Vrms. The wave form can be sine, square, or triangular. Calculate the MPU frequency for idle and rated speeds (see part number selection in Chapter 1). Woodward...
  • Page 18 The idle speed reference is now set very close to desired speed. A slight adjustment when the engine is running will achieve the exact speed. If the idle and rated speed pots were not preset with a signal generator, set the rated speed pot fully counterclockwise. Woodward...
  • Page 19 The four curves on the response curve diagram are examples of a naturally aspirated (not turbocharged) diesel engine. Note that increasing gain and decreasing stability causes shorter settling times at the expense of ringing. A chart recorder makes it easier to observe transient response. Woodward...
  • Page 20 Check that it now takes longer to go from rated to idle and from idle to rated. Set each pot for the desired time. Paralleled Generator Applications with the Load Sensor See Manual 82313, Generator Load Sensor 8290-048, for information concerning load sensor. Woodward...

  • Page 21: Figure 2-9. Starting And Transient Response Curves

    Manual 82493 EPG Electrically Powered Governor Figure 2-9. Starting and Transient Response Curves Woodward...

  • Page 22: Chapter 3. Operation

    Alternatively, the prime mover can run to rated speed on starting (refer to the curves in Figure 2-9). Paralleled generator applications can be equally automatic when a Woodward SPM Synchronizer is used. In both automatically and manually controlled applications, a Ramp Generator can be used to provide adjustable time to go from rated to idle speeds.

  • Page 23: Chapter 4. Description

    There is a failsafe circuit which senses MPU frequency and forces the pulse width modulator input to zero if the MPU frequency or voltage are below acceptable limits, as they would be if an MPU wire broke. Woodward...

  • Page 24: Figure 4-1. Epg Block Schematic Diagram

    EPG Electrically Powered Governor Manual 82493 Figure 4-1. EPG Block Schematic Diagram Woodward...

  • Page 25: Applications Using A Ramp Generator

    With an isolated bus, isochronous load sharing is usually chosen. In an isochronous load sharing system, the load gain signal voltage is shared with all other controls through paralleling lines, and provides an average load gain signal used by the controller circuits. Woodward...
  • Page 26 The Load Sensor and Speed Control can be in isochronous when used against an infinite bus with a Generator Loading Control or Import/Export Control. The Droop signal then comes from either the Generator Loading Control or the Import/Export Control. Woodward...

  • Page 27: Chapter 5. Troubleshooting

    It may be necessary to reduce the load signal to 3 volts in extreme cases. Consult with your authorized Distributor or with Woodward in such cases.
  • Page 28 1 through 4. Check for a short to ground on each wire. If the prime mover oscillates when cold and stabilizes when warm, turn the gain pot slightly counterclockwise. Turn the stability pot slightly clockwise if required to maintain stability. Woodward...

  • Page 29: Chapter 6. Service Options

    Product Service Options The following factory options are available for servicing Woodward equipment, based on the standard Woodward Product and Service Warranty (5-01-1205) that is in effect at the time the product is purchased from Woodward or the service is performed: •...

  • Page 30: Returning Equipment For Repair

    Returning Equipment for Repair If a control (or any part of an electronic control) is to be returned to Woodward for repair, please contact Woodward in advance to obtain a Return Authorization Number. When shipping the item(s), attach a tag with the following information: •...

  • Page 31: Replacement Parts

    To expedite the repair process, contact Woodward in advance to obtain a Return Authorization Number, and arrange for issue of a purchase order for the item(s) to be repaired. No work can be started until a purchase order is received.

  • Page 32: Engineering Services

    EPG Electrically Powered Governor Manual 82493 Engineering Services Woodward Industrial Controls Engineering Services offers the following after- sales support for Woodward products. For these services, you can contact us by telephone, by email, or through the Woodward website. • Technical Support •...

  • Page 33: Technical Assistance

    Type of Fuel (gas, gaseous, steam, etc) Rating Application Control/Governor Information Please list all Woodward governors, actuators, and electronic controls in your system: Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number Woodward Part Number and Revision Letter...
  • Page 34 EPG Electrically Powered Governor Manual 82493 Woodward...

  • Page 35: Declarations

    Declarations...
  • Page 36 Phone +1 (970) 482-5811 • Fax +1 (970) 498-3058 Email and Website—www.woodward.com Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address / phone / fax / email information for all locations is available on our website.

This manual is also suitable for:

Epg 524Epg 1712Epg 1724

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