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2301A Electronic Load Sharing and Speed Control
9905/9907 Series UL Listed E97763
Manual 82389 (Revision M)
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 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.
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.
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 battery-charging device, make sure the charging device is turned off before disconnecting the battery from the system.
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
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 1987 All Rights Reserved
Manual 82389
Description..............................................................................................................1 Applications ............................................................................................................1 References .............................................................................................................2 2301A Load Sharing and Speed Control Models, 9905/9907 Series ....................3
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
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
Introduction...........................................................................................................26 Speed Control.......................................................................................................26 Terminals for External Devices ............................................................................28 Paralleling.............................................................................................................28
Troubleshooting Procedure ..................................................................................31
Manual 82389
Product Service Options.......................................................................................38 Returning Equipment for Repair...........................................................................39 Replacement Parts ...............................................................................................40 How to Contact Woodward...................................................................................40 Engineering Services............................................................................................41 Technical Assistance............................................................................................42
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
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.). 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. 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. 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.
2301A LSSC Manual 82389 iv Woodward .
All potentiometers are accessible from the front of the chassis. 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. 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. or steam or gas turbines. an Import/Export Control. General Information Description The 9905/9907 series of the Woodward 2301A controls load sharing and speed of generators driven by diesel or gasoline engines.Manual 82389 2301A LSSC Chapter 1. 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. Woodward 1 . 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. a Generator Loading Control. a Process Control. Refer to the inside cover to change speed range and prevent possible overspeed. • Base loading against an infinite bus with the load controlled by an Automatic Power Transfer and Load (APTL) Control. The 2301A provides control in either isochronous or droop mode. Using the wrong speed range could cause an overspeed with resulting damage to equipment and/or personal injury or death. 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. 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. or another load-controlling accessory.
Models for three different actuator current ranges are available. and for use with either single or tandem actuators. 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.com/ic).woodward. If this option is not present. technical manual 25070 25195 82384 82510 82715 product specification 82383 82390 82516 82575 title Electric Governor Installation Guide Governing Fundamentals SPM-A Synchronizer 9905-002 Magnetic Pickups & Proximity Switches for Electronic Controls Guide for Handling and Protection of Electronic Controls. the low voltage model is not. Printed Circuit Boards. References The following publications contain additional product or installation information on Load Sharing and Speed Controls. This allows a backup mechanical ballhead governor to take control rather than shut down the prime mover as would a direct-acting system. and Modules title SPM-A Synchronizer 2301A Load Sharing and Speed Controls (9905 Series) EG3P/6P/10P Actuator EGB1P/2P Governor/Actuator 2 Woodward . The high voltage model is identified as such on the front. Tables 1-1 and 1-2 show part numbers and features of all 9905/9907 series 2301A load sharing and speed controls. and a low-voltage model (20 to 40 Vdc). They are available on the Woodward website (www. operation. 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 calibration. An optional deceleration ramp is also offered. the actuator calls for more fuel when the actuator voltage decreases.2301A LSSC Manual 82389 These controls are available for forward. and related components.or reverse-acting applications. See Chapter 6 for contact information. NOTE External wiring connections for reverse-acting controls are identical to those for direct-acting controls. Complete loss of voltage to the actuator will drive the actuator to full fuel. When this option is present. In reverse-acting systems. 45 to 440 Hz). as well as a high-voltage model (90 to 150 Vdc or 88 to 132 Vac. the time to ramp from rated speed to idle speed is approximately 20 seconds. or to answer questions concerning control installation. this happens instantly.
Both the lowand high-voltage models require a power capacity of 15 W minimum. Woodward 3 . High-Voltage 2301A Models (88–132 Vac or 90–150 Vdc) Part Number 9905-030 9905-031 9905-032 9905-033 9905-034 9905-035 9905-036 9905-037 9905-038 9905-039 Actuator Current (mA) 0–200 0–200 0–400 0–400 0–200 0–200 0–20 0–20 0–200 0–200 Forward/ Reverse Acting Forward Reverse Forward Reverse Forward Reverse Forward Reverse Forward Reverse Actuator Tandem/Single Single Single Single Single Tandem Tandem Single Single Single Single Decel Ramp 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. Low-Voltage 2301A Models (20 to 40 Vdc) Part Actuator Current Number (mA) 0–200 9905-020 0–200 9905-021 0–400 9905-022 0–400 9905-023 0–200 9905-024 0–200 9905-025 0–20 9905-026 0–20 9905-027 0–200 9905-028 0–200 9905-029 0–200 9907-018 * 0–200 9907-019 * 0–200 9907-023 * 0–200 9907-024 * *—CE Approved models Forward/ Reverse Acting Forward Reverse Forward Reverse Forward Reverse Forward Reverse Forward Reverse Forward Reverse Forward Reverse Actuator Tandem/Single Single Single Single Single Tandem Tandem Single Single Single Single Single Single Single Single Decel Ramp No No No No No No No No Yes Yes Yes Yes Yes Yes Table 1-2. The low voltage models operate on 20 to 40 Vdc. The installer should properly size wiring and fusing for the input power and PT/CT circuits. 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. Speed Ranges On these Woodward 2301A models. and the high voltage models operate on either 88 to 132 Vac or 90 to 150 Vdc.Manual 82389 2301A LSSC 2301A Load Sharing and Speed Control Models. 9905/9907 Series Table 1-1.
high voltage version—bottom) 4 Woodward . 2301A Control Outline Drawing (low voltage version—top.2301A LSSC Manual 82389 Figure 1-1.
Manual 82389 2301A LSSC Figure 1-2a. Plant Wiring Diagram (low-voltage supply) Woodward 5 .
Plant Wiring Diagram (high-voltage supply) 6 Woodward .2301A LSSC Manual 82389 Figure 1-2b.
scratches. If a battery is used for operating power. These wiring connections and shielding requirements are explained in the balance of this chapter. Electrical Connections External wiring connections and shielding requirements for a typical control installation are shown in the plant wiring diagram (Figure 1-2).Manual 82389 2301A LSSC Chapter 2. 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. make sure that the alternator or other battery-charging device is turned off or disconnected before disconnecting the battery from the control. Installation Unpacking Before handling the control. Power Requirements The 2301A control requires a voltage source of 18 to 40 Vdc. Location Considerations This product is intended for installation in a "closed electrical operating area" or in a closed industrial control cabinet. and loose or broken parts. Check the control for signs of damage such as bent or dented panels. 90 to 150 Vdc. CAUTION—BATTERY To prevent damage to the control. 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. Woodward 7 . read the "Electrostatic Discharge Awareness" precautions on page iii. immediately notify the shipper. or 88 to 132 Vac for operating power (15 W). an alternator or other battery charging device is necessary to maintain a stable supply voltage. If any damage is found. Be careful when unpacking the electronic control.
2. Where shielded cable is required. Figure 2-1. Wire exposed beyond the shield should be as short as possible. See manual 50532. Strip outer insulation from BOTH ENDS. Select the lowest speed range which contains this maximum speed sensor frequency. pointed tool. Connect wiring and shield as shown. Using a sharp. DO NOT CUT THE SHIELD. 5. 4. double shielded wire. Remove 6 mm (1/4 inch) of insulation from the inner conductor(s).2301A LSSC Manual 82389 Shielded Wiring All shielded cable must be twisted conductor pairs. cut the cable to the desired length and prepare the cable as instructed below and shown in Figure 2-1. or other precautions may be required. shielded wire run in conduit. The other end of the shields must be left open and insulated from any other conductor. Do not attempt to tin (solder) the braided shield. If shield is the braided type. All signal lines should be shielded to prevent picking up stray signals from adjacent equipment. exposing the braided or spiral wrapped shield. 1. 3. 8 Woodward . twist to prevent fraying. EMI Control for Electronic Governing Systems. Connect the shields to the control terminals as shown in Figure 2-1 and in the plant wiring diagram (Figure 1-2). Pull inner conductor(s) out of the shield. In installations with severe electromagnetic interference (EMI). carefully spread the strands of the shield. Preparation and Installation of Shielded Cables Setting Speed Range The speed range to be selected is determined by the maximum desired prime mover speed. Contact Woodward for more information. for more information. Do not run shielded signal wires with other wires carrying large currents. not exceeding 50 mm (2 inches). 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.
Using the wrong speed range could cause an overspeed with resulting damage to equipment and/or personal injury or death. Figure 2-2. Refer to the plant wiring diagram (Figure 1-2).Manual 82389 2301A LSSC Figure 2-2 shows the four sections of Switch S1 and their corresponding speed ranges. Woodward 9 . 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. Current Transformer Connections The standard method of connecting the current transformers is shown in the plant wiring diagram (Figure 1-2). Set the proper section of Switch S1 to the ON position and the other three positions of Switch S1 to the OFF position. An alternate method is the open delta connection shown in the insert in the plant wiring diagram. 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.
10 Woodward . no relay is required between the control and the load-sharing-line bus. the control remains in the droop mode even when the circuit-breaker auxiliary contact is closed. and the load-matching circuit is connected to the load-sharing lines. If a single prime mover is required to run isochronously with an isolated load. Droop Contact and Circuit Breaker Auxiliary Contact NOTE The control is in the droop mode whenever the circuit-breaker auxiliary contact is open. When load sharing with different controls. B). The circuitbreaker 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. Figure 2-3. Import/Export Control. the control is in the isochronous loadsharing mode (Figure 2-3. In this mode. or when paralleled with incompatible governors. Use shielded cable and connect the load-sharing lines directly to terminals 10 (+) and 11 (–). When all controls in the system are of the 2301A type. the shields may be connected continuously between controls.) When running a single unit on an infinite bus with a Generator Loading Control or Import/Export Control. the internal load-sharing-line relay is energized. 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 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). A). or other load controlling accessory. The control is in the droop mode when EITHER the droop contact or the circuitbreaker auxiliary contact is open (Figure 2-3. turn the DROOP potentiometer fully counterclockwise. Automatic Power Transfer and Load Control. Droop operation is required when the generator is paralleled with an infinite bus without a Generator Loading Control. When both the droop contact and circuitbreaker auxiliary contact are closed. (All Woodward electric loadsharing systems are compatible.2301A LSSC Manual 82389 Droop Contact (Isoch-Droop) and Load Sharing Lines Because the load-sharing-line relay is contained in the control. The load-sharing lines must be wired to the Generator Loading Control or Import/Export Control. do not connect the shields at the point where connections are made to the load-sharing-line bus. Process Control. If the droop contact is open. Connect the shield to terminal 12. the droop signal is disabled (permitting isochronous load sharing).
Applying power before a control is completely connected may damage the control. Woodward 11 . the control will not operate without 18 to 40 Vdc applied to terminal 17. CAUTION—DO NOT APPLY POWER DO NOT apply power to the control at this time. When the contact is open. turning the control output off in the event of a loss of speed signal. On some steam turbine systems. the cranking speed is usually sufficient to provide a speed signal. 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). it should be of the momentary type to ensure that the failed-speed-sensor shutdown circuit is enabled after start-up. WARNING—EMERGENCY STOP Do NOT use the minimum-fuel contact as part of any emergency stop sequence. If a failed-speed-signal-override contact is used. the speed signal is nonexistent. Minimum Fuel Contact The minimum-fuel contact is intended as an optional means for a normal shutdown of the prime mover. Prior to start-up of the prime mover. Do NOT remove this jumper from terminal 17 unless a minimum fuel contact is installed. the Close to Override Failed Speed Signal contact must be closed in order to allow the actuator to open and provide steam for starting. the voltage applied to terminal 17 allows the control to move the actuator to any position required for operating conditions. be sure the system includes an alternator or other batterycharging device. connecting the negative lead to terminal 15. When the contact is closed.Manual 82389 2301A LSSC Power Supply Run the power leads directly from the power source to the control. so an override contact on terminal 18 is not needed for starting. If the power source is a battery. On prime movers with cranking motors. 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. Closing the contact overrides the failed-speed-signal circuit as may be required for start-up. and the positive lead to terminal 16. the control operates normally.
to terminals 28 and 29 using shielded wire. The shield must be insulated from all other conducting surfaces. using shielded wire. Connect the shield to terminal 22. but do not connect the shield to the synchronizer. When the contact is open. table for additional information on actuator installation. single-throw contact from terminal 16 (terminal 0 on highvoltage controls) to terminal 19. and that the shield is insulated from all other conducting surfaces. If less adjustment is desired. and that the shield is insulated from all other conducting surfaces. connect it as shown in the plant wiring diagram (Figure 1-2). Actuator Output The actuator wires connect to terminals 20 (+) and 21 (–). Potentiometers of the multi-turn type are recommended. Connect the shield to terminal 27. Speed Sensor Connect a speed-sensing device. The shield must have continuity the entire distance to the actuator.2301A LSSC Manual 82389 Idle/Rated Ramp Contact Connect a single-pole. Use shielded wires with the shield connected to terminal 22. the voltage is removed from terminal 19. When closed. Do not connect the shield to the actuator or any other point. Make sure the shield has continuity the entire distance to the SPM Synchronizer. close for rated) terminal. 12 Woodward . 20 to 40 Vdc is applied to terminal 19. making sure the shield has continuity the entire distance to the speed sensor. the Close For Rated (open for idle. A 100 Ω potentiometer will provide ±5% speed adjustment. Refer to the manuals listed in Chapter 1. and connect the shield to terminal 27. and must be insulated from all other conducting surfaces. Oil pressure is often used to close this contact. potentiometers of smaller values may be used. Use shielded wire. Make sure the shield has continuity the entire distance to the potentiometer. Speed and Phase Matching (SPM) Synchronizer Connect the SPM Synchronizer (optional equipment) wires to terminals 25 (+) and 26 (–). External Speed Trim A jumper must be connected to terminals 23 and 24 unless an optional remote Speed Trim potentiometer is used. References. such as a magnetic pickup. and the prime mover can be operated at a speed higher than idle. If a Speed Trim potentiometer is used. and the prime mover's speed immediately decelerates to idle.
25 and 1. do the following check-out procedure before beginning the start-up adjustments in Chapter 3. C. 2. check the clearance between the gear and the sensor.010 and 0. Refer to the appropriate actuator manual and to Manual 25070. Make sure the gear has less than 0. the control may not be able to shut the turbine down. Woodward 13 . 1. See Manual 82510. If the sensor is a magnetic pickup. 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. D. for additional information on linkage. Visual Inspection A. causing damage to equipment or injury or death. Check for correct wiring per the plant wiring diagram (Figure 1-2). Check for grounds by measuring the resistance from terminal 11 to chassis. Clearance should be between 0. Electric Governor Installation Guide. and adjust if necessary.040 inch) at the closest point. Check the line that was removed last to locate the fault.00 mm (0. If the actuator lever gets to its minimum position before completely shutting off fuel or steam. Check for broken terminals and loose terminal screws. B. Check for Grounds Make sure power is off. If a resistance other than infinite is obtained. Check the linkage between the actuator and the prime mover for looseness or binding. The resistance should be infinite. remove the connections from each terminal one at a time until the resistance is infinite. Magnetic Pickups for Electric Governors. and from terminal 15 to 11.020 inch) diametric runout.Manual 82389 2301A LSSC Installation Check-out Procedure With the installation completed as described in this chapter. Check the speed sensor for visible damage.50 mm (0.
Operation and Adjustment Initial Pre-Start Settings WARNING—READ FULL PROCEDURE Read this entire procedure before starting the prime mover. to mid-position. 6. B. Set the control for isochronous operation by closing the droop contact. RATED SPEED A. A. 9. 3. 1. 4.2301A LSSC Manual 82389 Chapter 3. Be sure that the actuator is connected to terminals 20 and 21. Set the RATED SPEED potentiometer to minimum (fully counterclockwise). Close the Close For Rated contact. 2. 5. Set the ACTUATOR COMPENSATION potentiometer at 6 on the 0 to 10 potentiometer scale for carbureted-gas or gasoline prime movers. GAIN—Set at mid-position. LOAD GAIN—Set at mid-position. LOW IDLE SPEED—Set at maximum (fully clockwise). 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. ACTUATOR COMPENSATION. RESET—Set at mid-position. RAMP TIME—Set at maximum (fully clockwise). or fuel-injected gasoline prime movers. 14 Woodward . 8. 10. if used. 2. and steam turbines. the Close For Rated contact (open for idle/close for rated) should be open if the prime mover is to start at idle. B. NOTE This is for initial prime mover start-up only. Complete the installation checkout procedure in Chapter 2. For normal start-up. gas turbine. Set the ACTUATOR COMPENSATION potentiometer at 2 on the 0 to 10 potentiometer scale for diesel. 7. DROOP—Set at minimum (fully counterclockwise). Start-Up Adjustments 1. Set the external Speed Trim. START FUEL LIMIT—Set at maximum (fully clockwise). and the initial prestart settings above.
When using a signal generator to set rated speed.) Put the Close For Rated contact in the rated (closed) position. At 5% of the lower value of the control's speed range. Connect a dc analog voltmeter to terminals 20 (+) and 21 (–) to read actuator voltage. Continue to very slowly adjust the RATED SPEED potentiometer in the appropriate direction. slowly turn the RATED SPEED potentiometer counterclockwise (clockwise for reverse-acting controls) until the voltage just begins to move to minimum. WARNING—START-UP Be prepared to make an emergency shutdown when starting the engine. loss of life. measured at cranking speed or the lowest controlling speed. Set the speed trim potentiometer. 2301A LSSC If a signal generator is not used. turbine. 4. If the actuator voltage is at maximum. A slight adjustment when the engine is running will achieve the exact speed. (The rated speed frequency in Hz equals the rated prime mover speed in rpm times the number of teeth on the speed-sensing gear divided by 60. set the RATED SPEED potentiometer at minimum (fully counterclockwise). to protect against runaway or overspeed with possible personal injury. or other type of prime mover. the failed speed sensing circuit is cleared. 5. with the speed sensor connected to the control. slowly turn the RATED SPEED potentiometer clockwise (counterclockwise for reverse-acting controls) until the voltage just begins to move to maximum.0 Vrms. if used. 6. measure the voltage while cranking. Minimum voltage required from the speed sensor to operate the electronic control is 1. Start the prime mover. set the signal generator for the frequency of the speed sensor at rated speed. to mid-position. cease adjusting when the voltage changes slowly. Apply input power to the control. and connect it to terminals 28 and 29.05 = 100 Hz). Because it is not possible to stop the motion. be sure to prevent the prime mover from starting. or property damage. The RATED SPEED potentiometer is now set very close to desired speed. For example 100 Hz is required on the 2000 to 6000 Hz speed range (2000 Hz x 0. trying to stop the actuator voltage between the minimum and maximum voltages.Manual 82389 3. If the actuator voltage is at minimum (minimum will be approximately 0 volts). Before cranking. Preset rated speed. Check the speed sensor. Woodward 15 . For this test.
To reduce overshoot. lf the prime mover is hunting at a rapid rate. increasing the RESET clockwise may require decreasing the GAIN (turning the GAIN potentiometer counterclockwise) to maintain stable operation. 16 Woodward . or bump the actuator terminal shaft. To achieve optimum response. NOTE Adjusting the GAIN may cause momentary changes in speed which can be minimized by turning the GAIN potentiometer slowly.2301A LSSC Manual 82389 Adjust For Stable Operation If prime-mover operation is stable. Step load the generator. stable prime-mover-speed response. or desired. Adjusting the GAIN may cause a momentary speed change which can be minimized by turning the GAIN potentiometer slowly. then slowly turn the GAIN back counterclockwise as necessary to stabilize the meter reading. slowly decrease the GAIN (turn the potentiometer counterclockwise) until performance is stable. If the prime mover is hunting at a slow rate. slowly increase the GAIN (turn the potentiometer clockwise) until the voltage on the voltmeter becomes slightly unstable. increase the RESET (turn the potentiometer clockwise). increase the RESET (turn the potentiometer clockwise) until the prime mover stabilizes. to make sure that the prime mover returns to the proper speed with little overshoot or undershoot of the speed setting. and the external speed trim potentiometer (if used) set at mid-position. When the RESET potentiometer is in the lower part of its adjustment (0 to 3 on the potentiometer scale). If increasing the RESET potentiometer does not stabilize the prime mover. Dynamic Adjustment The object of the GAIN and RESET potentiometer adjustment is to obtain the optimum. decrease the RESET by turning the potentiometer counterclockwise. go to the "Speed Setting Adjustment" procedure. Speed Setting Adjustment With the prime mover operating stably. If the prime mover is slow in returning to the proper speed. it also may be necessary to either: • Slowly decrease the GAIN (turn the potentiometer counterclockwise) or • Slowly decrease the GAIN and increase the ACTUATOR COMPENSATION. Connect a dc analog voltmeter to terminals 20 (+) and 21 (–) to monitor the actuator voltage. Increasing the setting of the GAIN potentiometer provides faster transient response (decreases the magnitude of the speed change from a sudden change in load). adjust the RATED SPEED potentiometer to bring the prime mover to the desired operating speed.
Woodward 17 . In some cases. Low Idle Speed Adjustment 1. If a slow periodic instability remains. The prime mover should be approximately at rated speed with the LOW IDLE SPEED potentiometer set at maximum (fully clockwise). slightly decrease the ACTUATOR COMPENSATION (turn the potentiometer counterclockwise). This may be required when engine torsionals cause excessive fuel-linkage movement. no further adjustment is normally required. If necessary. the gain must be reduced slightly to ensure stability under widely varying conditions. 2. start at the fully clockwise (maximum ramp time) position and work back in the counterclockwise direction until the unit ramps as rapidly as desired. Actuator Compensation Adjustment If the ACTUATOR COMPENSATION is set as described under Initial Prestart Settings. and stable. First. slightly increase the ACTUATOR COMPENSATION (turn the potentiometer clockwise). the ACTUATOR COMPENSATION may be set fully counterclockwise.Manual 82389 2301A LSSC Figure 3-1 illustrates prime mover starts with the RAMP TIME potentiometer fully counterclockwise (no ramp). If a fast instability or extremely active actuator is evident. and repeat the GAIN and RESET adjustments. step loadings at four different RESET potentiometer settings. NOTE Optimum performance is not necessarily obtained with the GAIN potentiometer at the maximum stable clockwise position. NOTE Make certain that the prime-mover speed is controlled by the LOW IDLE SPEED potentiometer in a range above the minimum-fuel position (mechanical stop) of the actuator or prime-mover fuel rack. Ramp Time Adjustment Adjust the RAMP TIME potentiometer to achieve satisfactory prime mover acceleration to rated speed with minimum overshoot. These are typical performance curves on a naturally aspirated (non-turbocharged) diesel engine. Open the external CLOSE FOR RATED contact. steady-state running conditions. Decrease the LOW IDLE SPEED (turn the potentiometer counterclockwise) until the recommended idle speed is reached. Continue to increase the ACTUATOR COMPENSATION and readjust the GAIN and RESET until stability is achieved.
Diesel Engine Performance Curves 18 Woodward .2301A LSSC Manual 82389 Figure 3-1.
Current Transformer (CT) Phasing Check NOTE This control contains internal current transformers. The voltage to the actuator should now be adjustable by the START FUEL LIMIT potentiometer. 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. measure the voltage across terminals 28 and 29 to be sure there is a minimum of 1. the reverse-acting control will position the actuator at the start-fuel level if the failed-speed-signal override is activated. WARNING—HIGH VOLTAGE Never disconnect any wire attached to load sensor terminals 4 through 9 when the prime mover is running unless temporary 1 Ω. and a maximum of 30 Vrms at rated speed. Remove the Failed Speed Signal Override contact if not required to start the prime mover. and be sure that there is still a minimum of 1. and smoke emissions obtained.0 V at cranking speed. overshoot of speed setting. The fuel-limiting function is turned off automatically when the speed control takes over. The START FUEL LIMIT may be adjusted as required to optimize the prime-mover starting characteristics. 5 W resistors are Installed as shown in Figure 3-2. the START FUEL LIMIT function can be deactivated by turning the potentiometer fully clockwise. Woodward 19 . Speed Sensor Check If the sensor is a magnetic pickup. increase the gap of the speed sensor. Set the actuator voltage approximately 10% higher than the voltage obtained at rated speed for forward-acting controls and 10% lower than rated speed voltage for reverse-acting controls. The current input must be removed from the control and shorted externally. NOTE For prime movers not requiring start-fuel limiting. With the prime mover operating at rated speed and no load. The current transformers can develop dangerously high voltages when open circuited while the prime mover is running.0 V at cranking speed. shorting their inputs is not effective. Shut down the prime mover and activate the Failed Speed Signal Override by closing the override contact. Due to their low impedance. The Start Fuel Limit can be deactivated by turning the potentiometer fully clockwise. If the voltage exceeds 30 V. Start the prime mover and observe the start time.Manual 82389 2301A LSSC Start Fuel Limit Adjustment NOTE Start-fuel limit is not recommended for use with reverse-acting controls. record the voltage across actuator terminals 20 (+) and 21 (–). and all load is removed. With loss of speed signal.
maintaining the original polarity. 3. and with the polarity that produces the highest positive voltage. 4. Unload and shut down the prime mover. Reconnect phase A CT wire from terminal 4 to terminal 5. If the phasing appears correct. in each polarity. Start the prime mover. Connecting the last CT in the polarity that produces the highest voltage completes the procedure. Manual 82389 Connect a dc voltmeter to control terminals 11 (–) and 13 (+) to measure the load signal. apply full load (or the same load as obtained in step 2) and again measure the load signal at terminals 11 and 13. Phase Correction Procedure NOTE This procedure requires a minimum power factor of 0. The load-signal voltage is recorded for each connection and the first CT is then connected to the terminals that produce the highest positive voltage. The second CT is tried on each of the remaining two CT input terminals. and the voltage recorded. The following procedure will assure the correct connection of the current transformers. Unload and shut down the prime mover. and the voltage recorded. Start the prime mover. load the generator to as near to full load as possible. The highest positive voltage will be obtained when the CTs are correctly matched to the load-sensor terminals in both phase and polarity. are made (a total of six connections). 2. polarized both ways. or loading stability is extremely sensitive to the power factor. NOTE If after completing the LOAD GAIN and DROOP adjustments. and connect both wires from phase A CT to terminal 4. 20 Woodward . If the load signal voltage is not 1/3 lower than the reading obtained in step 2. proceed to the Phase Correction Procedure. Trial connections of the first CT to all three load-sensor inputs. With the generator operating in the isochronous mode and not paralleled. the phasing is incorrect. If a 0. If the phasing is incorrect.9. Disconnect the wire from terminal 5. the control loading is extremely sensitive to changes in the power factor when operating in parallel. tracing through the wiring is the only means of correcting the current-transformer phasing. polarized both ways.2301A LSSC 1. complete the Phase Correction Procedure. skip the Phase Correction Procedure and go to the Load Gain Adjustment procedure. The second CT is then connected to the terminals that produce (and with the polarity that produces) the highest positive voltage. It is required only if the phasing check indicates incorrect phasing. Measure the load-signal voltage.9 power factor cannot be obtained. The last CT is then tried on the remaining input terminals.
Start the prime mover.Manual 82389 2301A LSSC The Phase Correction Procedure requires that the prime mover be shut down many times to disconnect the current transformers. Disconnect the phase C CT wires from terminals 8 and 9. For convenience. Temporary Wiring for Transformer Phase Correction If the temporary burden resistors described above and shown in Figure 3-2 are not used. a temporary method of connecting the current transformers shown in Figure 3-2 is recommended. Start a list and record this voltage. Figure 3-2. Even though this identification may prove to be incorrect. Connecting a 1 Ω. Woodward . and tape the connection. this step is necessary so that the individual wires may be identified during the description of the procedure. 2. Measure the load-signal voltage in this procedure by connecting a voltmeter across the Load Signal terminals 11 (–) and 13 (+). Connect these two wires together using a small screw and nut. apply full load. 1. Shut down the prime mover. Label each CT wire with the phase and polarity that you think it should be. WARNING—HIGH VOLTAGE The current transformers can develop dangerously high voltages. 4. 5 W resistors are Installed as shown In Figure 3-2. 6. after removing all load. Do not disconnect a current transformer while the prime mover is running unless temporary 1 Ω. and all load is removed. Connect and tape these two wires together as in step 3. 21 3. Disconnect the phase B CT wires from terminals 6 and 7. the prime mover MUST be shut down in addition to removing the load in the following procedure. and measure the load signal voltage. Connect the two wires from the phase A CT to the phase A input terminals 4 and 5. 5. 5 W burden resistor across each current transformer allows the current transformers to be disconnected from the terminal strip with the prime mover running.
17. measure the load signal. * Apply full load. measure the load signal. Apply full load. and connect them to phase C input terminals 8 and 9. and compare the four voltages on the list. * 24. 21. Apply full load. 15. * 14. 23. Apply full load.2301A LSSC 7. and record this voltage. Remove the phase B CT wires and connect them to the pair of CT input terminals that produced the highest positive load signal voltage and with the polarity that produced the highest positive load signal voltage. and connect them to phase B input terminals 6 and 7. 25. and record this voltage. measure the load signal. * 18. measure the load signal. 8. * 26. 13. 20. Start a new list and record this voltage. Unload the system and compare the six voltage readings. Remove the phase A CT wires from terminal 8 and 9 and connect the phase A wires to the pair of terminals that produced the highest positive loadsignal voltage and in the polarity that produced the highest positive loadsignal voltage. Manual 82389 Unload the system and reverse the phase A CT wires on terminals 4 and 5. and reverse the phase B CT wires on the same terminals. Unload the system. and connect them to the other pair of terminals. Record this voltage. Unload the system. Connect the phase B CT wires to one pair of the two remaining pair of CT input terminals on the load sensor. 27. and record this voltage. remove the phase A CT wires from terminals 4 and 5. * 22 Woodward . Unload the system and reverse the phase A CT wires on terminals 8 and 9. and record this voltage. 9. * 16. Apply full load and measure the load signal. measure the load signal. * 22. Apply full load and measure the load signal. 11. Unload the system. remove the phase A CT wires from terminals 6 and 7. Untape and disconnect the phase B CT wires. Unload the system and reverse the phase B CT wires on the same terminals. Apply full load. * 12. and record this voltage. measure the load signal. Apply full load. 19. and record this voltage. and record this voltage. * 10. remove the phase B CT wires. Unload the system. measure the load signal. Unload the system and reverse the phase A CT wires on terminals 6 and 7. Apply full load. Unload the system.
Unload and shut down the system. When the load-signal voltages of all generators in a system are reduced. Start the prime mover and apply full load. and reduce the load-signal voltage setting of all other generators in the system to the same voltage. If stability problems occur when paralleled at a particular load-signal voltage. Compare the two voltages. Apply full load. 32. 30. and the phasing has been checked and is correct. * If 6 volts at full load (or a lower voltage proportional to a load less than 100%) cannot be obtained. at 50% load adjust the LOAD GAIN to 3 V. Connect a dc voltmeter across terminals 11 (–) and 13 (+) to measure the load-signal voltage. It may be necessary to reduce the load-signal voltage of each unit in the system to as low as 3 V in cases of extremely poor system dynamics. measure the load signal. generator speeds must be the same. measure the load signal. *—Be sure to shut down the prime mover if the temporary burden resistors are not used. The currenttransformer output must be from 3 to 7 A (5 A nominal) at full load. and record this voltage. 29. * 31. reduce the voltage by reducing the LOAD GAIN (turn the potentiometer counterclockwise). Remove the burden resistors and terminal block. 34. Unload the system and reverse the phase C CT wires on the same terminals. Measure the load signal voltage and adjust the LOAD GAIN potentiometer for 6. Apply full load. the generator must be running isochronously and not paralleled. Load Gain Adjustment For this procedure. the load-sharing gain will be reduced. When paralleled in the isochronous mode or on an isolated bus. Increasing the LOAD GAIN (turning the potentiometer clockwise) will cause that generator to carry less load. * If full load is not obtainable. the current transformers are probably the wrong size. Any difference in loads between the units can be corrected by adjusting the Load Gain Potentiometer. Untape and disconnect the phase C CT wires. consult Woodward for suggestions for possible remedies.0 V. * 33.Manual 82389 2301A LSSC 28. If your system requires a load-signal voltage as low as 3 V. For example. and this may result in some loss of load-sharing sensitivity. Re-label each wire with the phase designation of the terminal that it is now connected to. Woodward 23 . Connect these two wires to the remaining pair of CT input terminals. load sharing will not remain proportional as the load varies. decrease the LOAD GAIN proportionally to the load. and record this voltage. Connect the phase C CT wires to the same pair of CT input terminals. 35. If they are not equal. but in the polarity that produced the highest positive load-signal voltage.
Droop in a load sensor is usually expressed as a percentage and calculated by the following formula. Open the droop contact connected to terminal 14.2301A LSSC Manual 82389 Droop Adjustment Adjustment of the DROOP potentiometer is necessary when the generator set is to be operated in the droop mode. 2. Droop Adjustment Setting Droop when Against Utility Use the following procedure to set the Droop and Load Gain potentiometers with the utility as the only load. Setting Droop for an Isolated Load 1. % Droop = No Load Speed – Full Load Speed No Load Speed x 100 The method of setting droop depends on whether the load of the generator set is an isolated load or an infinite bus.5 Hz would indicate 5% droop (see Figure 3-3). * Adjust the DROOP potentiometer to give the desired speed. 4.8 Woodward 24 . 3. 1. *—If only 50% loading is possible. 57 Hz at full load indicates 5% droop. Apply full load. Example: Operating at 60 Hz. Start the prime mover and adjust the RATED SPEED potentiometer for rated speed with no load. 58.03) No Load Frequency = 60 x (1 + 0.03) = 61.0 Hz Desired droop = 3% (0. Calculate the fully loaded speed (or frequency) of the generator when running at 100% load. No Load frequency = rated frequency x (1 + droop %) Example: Rated frequency = 60. Figure 3-3.
For example. 3% Droop at 60 Hz Woodward 25 . Check the phasing of the CTs and PTs. Make changes in small increments to prevent overload.Manual 82389 2. 5. 7. Figure 3-4. WARNING—OVERLOAD If when you close the breaker. use a Load Gain Voltage value that is proportional to the percent load used. • MOP or Other—measure and record the value of the speed-setting voltage (at the control). 3. and increase the load by increasing the speed setting to the setting recorded in step 2. Synchronize. 4. Preset both the Load Gain and potentiometers fully clockwise.0 Vdc at full load. open the breaker and shut the unit down. and injury or death to personnel. close the generator breaker. if the Load Gain Voltage at full load is 6.0 Vdc. 6.0 Vdc *. you would adjust for a Load Gain Voltage of 3. Permitting the unit to continue to pick up load or continuing to operate the system without correcting this condition may cause damage to equipment. * NOTE Most systems use a Load Gain Voltage of 6. Reduce system speed to rated (frequency). with no load. Record the setting of your speed-setting device: • Potentiometer—record setting with a pencil mark. CAUTION—OVERLOAD The adjustments in steps 6 and 7 are non-linear. 2301A LSSC Run the generator at the speed calculated in step 1.0 Vdc at 50% load. the load on the unit increases rapidly. To perform this procedure at less than full load. Increase the load on the unit by turning the Droop potentiometer counterclockwise until the Load Gain Voltage reads 6. Increase load by turning the Load Gain potentiometer counterclockwise until the load is at the desired 100% value.
the load sharing section senses the load carried by its generator and causes the loads of all generators in the system to be shared proportionally. Speed Control The Speed Control system as shown in Figure 4-1 consists of: • a device (1) to sense the speed of the prime mover • a Frequency to Voltage Converter (2) • a Speed Reference (3) to which the prime mover speed can be compared • A Speed Summer/Amplifier (4) with an output proportional to the amount of fuel or steam required to maintain the desired speed at any given load • An Actuator (5) to position the fuel or steam mechanism of the prime mover Figure 4-1. for more information on magnetic pickups. The frequency-to-voltage converter receives the ac signal from the speed sensor and changes it to a proportional dc voltage. • Load Sharing—During parallel operation of two or more generators. senses the speed of the prime mover. and converts it to an ac signal with a frequency proportional to prime-mover speed. See Woodward manual 82510. Description of Operation Introduction The speed and load sharing section of these 2301A models monitors and controls two functions. Speed Control System A speed-sensing device. 26 Woodward . A speed-reference circuit generates a dc "reference" voltage to which the speedsignal voltage is compared. Magnetic Pickups & Proximity Switches for Electronic Controls. • Speed—The speed control section keeps the prime mover at the correct speed.2301A LSSC Manual 82389 Chapter 4. such as a magnetic pickup.
They include: • the RATED SPEED potentiometer • the START FUEL LIMIT potentiometer • RESET. minimum fuel is defined as: • Actuator current less than 10 mA for forward-acting controls. For controls with actuator current of 40 to 320 mA. Because of the variety of installations. The actuator responds to the signal from the control amplifier by repositioning the fuel or steam rack. If the speed-signal voltage is lower or higher than the reference voltage. a signal is sent by the control amplifier calling for an increase or decrease in speed. For controls with actuator current of 20 to 160 mA. which may be required for start-up. minimum actuator position may not permit prime-mover shutdown. and ACTUATOR COMPENSATION • RAMP TIME and LOW IDLE SPEED potentiometers Figure 4-2. Temporarily closing the contact overrides the failed-speed-signal circuit. The potentiometers for setting and adjusting these circuits are located in the upper right corner of the control as shown in Figure 4-2. • Actuator current greater than 360 mA for reverse-acting controls. the converter-speed voltage and the reference-speed voltage are equal. However. The minimum-fuel signal is sufficient to cause the actuator to go to the minimum position if not restricted. Speed Control Adjustments The RATED SPEED potentiometer is adjusted so that at rated speed.Manual 82389 2301A LSSC The speed-signal voltage is compared to the reference voltage at the summing point. A failed-speed-signal circuit monitors the speed-signal input. plus system and component tolerances. A contact to override the failed-speed-signal circuit can be connected in series with terminal 18 and terminal 16 (or terminal 0 on high voltage controls). Woodward 27 . • Actuator current greater than 180 mA reverse-acting controls. GAIN. minimum fuel is defined as: • Actuator current less than 20 mA for forward-acting controls. the control must be tuned to each system for optimum performance. changing the speed of the prime mover until the speed-signal voltage and the reference voltage are equal. due to linkage adjustment or other restrictions in the external system. When no signal is detected. it calls for minimum fuel.
2301A LSSC Manual 82389 The START FUEL LIMIT potentiometer provides a means of limiting the fuel-rack position when starting diesel engines. the control is in isochronous load sharing. where speed decreases with load. ACTUATOR COMPENSATION compensates for the time the actuator and prime mover system takes to react to signals from the control. Adjustment of the potentiometer sets the maximum actuator position desired. the control is in droop. the Load Matching circuit corrects the fuel output to proportion load. 28 Woodward . Terminals for External Devices Terminal blocks for wiring the control to the system are at the lower front panel of the control. The current load on each phase is multiplied by the cosine of the phase difference between the current and the voltage. and isochronous. The time taken by the prime mover to accelerate from idle to rated speed. the generator picks up the available load and remains at isochronous speed. A contact in series with the auxiliary contact may be used to select either the droop or isochronous mode of operation. and the recommended idle speed. The magnitude of the speed change resulting from a sudden change in load is controlled by adjusting the GAIN. Additional terminals are included for connecting other external devices as shown in Figure 4-3. An amplifier in the load-sensing circuit computes the load carried by each phase of the generator. and is turned off when speed control takes over. where speed remains constant. The RESET adjustment affects prime mover reaction time when recovering after a sudden load change. By setting the load-gain voltage on each unit to the same level at full load. If additional units are on line. The paralleling system as shown in Figure 4-4 consists of: • Load Matching circuit (1) • a Load Amplifier circuit (2) An auxiliary contact on the generator tie-breaker connected from terminal 16 (or terminal 0 on high voltage controls) to terminal 14 is used to select isochronous load-sharing operation. Regardless of differences in generator-set capacities in the system. If either the auxiliary contact or the droop contact is open. each generator set is loaded to the same percentage of its capacity. GAIN and ACTUATOR COMPENSATION potentiometers adjust the control amplifier to accommodate various types of prime-mover systems. With only one unit on line. proportional load sharing is achieved. Paralleling There are two basic methods used for paralleling: droop. and the three phases are added to determine the total load. RESET. This limit position is automatically enabled prior to start-up. When they are both closed. A final adjustment of the individual LOAD GAIN potentiometers will compensate for minor differences in the generator sets. The output of the load amplifier is adjusted by the LOAD GAIN potentiometer shown in Figure 4-5. are set with the RAMP TIME and LOW IDLE SPEED potentiometers respectively.
this terminal provides +20 Vdc for input terminals 14. Terminal 16—On low voltage models. 19. 17. When open. Terminal 18—A contact to override the failed speed protective circuit for start-up and start fuel setup calibration. 18. Terminals 23 and 24—An external means of remotely fine tuning the speed setting. control is in isochronous and the load sharing lines are active. 17. and is the dc supply + connecting point. **—See Woodward manual 82384. and 30. this terminal is either one of the ac input terminals (on ac supply) or the dc + connecting point (on dc supply). 18. 19.Manual 82389 2301A LSSC NOTES Terminal 0—On high voltage models. Terminal 19—A contact to accelerate from idle to rated speed when the contact is closed. and 30. It also may be used for manual synchronization or for loading the generator when operating in droop mode. Terminal Connections Woodward 29 . An SPM synchronizer automatically generates a signal to bias the speed of the prime mover of an off-line generator so that its frequency and phase match those of the bus. this terminal is not used. for more information on the SPM-A. Figure 4-3. Terminals 25 and 26—Provide for use of an optional speed and phase matching (SPM) synchronizer. control is in droop and the load sharing lines are disabled.* The jumper must not be used on high voltage models.** *—Do not use the minimum fuel contact option as part of any emergency stop sequence. On high voltage models. Terminal 17—A contact to drive the output to minimum fuel when required for shutdown. Terminal 14—When contact is closed. this terminal provides a +dc source for input terminals 14. SPM-A Synchronizer 9905-002. On low voltage models.
2301A LSSC Manual 82389 Figure 4-4. particularly through the load-sharing lines. The amount of speed change or droop is expressed in percent. 30 Woodward . and is set by the DROOP potentiometer shown in Figure 4-5. Paralleling Adjustments As mentioned in the general information section. droop mode allows operation of a generator on an infinite bus or in parallel with other engine generator units using hydromechanical governors. In droop. The 2301A Load Sharing and Speed Control is powered by a dc-dc isolated power supply. and allows load sharing with earlier models of Woodward load-sharing controls. speed changes as the load on the generator changes. which allows operation over a wide voltage range without generating excessive heat. Paralleling System Figure 4-5. This isolation protects the system from interference caused by ground loops. An increase in load results in a decrease in speed.
Reverse leads if polarity is incorrect (dc only). or property damage. If there is a voltage output at control terminals 20 (+) and 21 (–). remember that terminals C and D of the mating plug should be jumpered. When replacing a control. actuator. switch and relay contacts. Remedy Check for proper voltage from terminals 16 (+) to 15 (–). or elsewhere. loss of life. to protect against runaway or overspeed with possible personal injury. Actuator not moving to start-fuel position. Start fuel limit set too low. Make the checks in the order indicated. Troubleshooting Procedure Table 5-1 is a general guide for isolating system problems. WARNING—START-UP Be prepared to make an emergency shutdown when starting the engine. Actuator or Linkage. plant wiring. Actuator not responding to input signal from control.Manual 82389 2301A LSSC Chapter 5.. (Read with leads at T20 and T21 disconnected. Table 6-1. for the correct voltage. but the actuator does not move. check the power supply. turbine. Troubleshooting The following troubleshooting guide is an aid in isolating trouble to the control box. Check actuator and linkage for proper installation and operation. Make resistance checks at the actuator. NOTE The hydraulic actuator must have oil pressure and gear rotation to operate (respond). direction of rotation. Coil resistance on Woodward actuators is approximately 35 Ω.) Turn start fuel limit clockwise until prime mover starts. CAUTION—INPUT VOLTAGE The control can be damaged with the wrong voltage. insufficient drainage. and input and output connections are correct and in good working order. NOTE—If the actuator moves to start position. or other type of prime mover. soldering connections. Various system checks assume that the prior checks have been properly done. the wiring to the actuator should be checked for opens or shorts. or improper adjustment. worn actuator components. or no supply voltage. etc. Problems may be oil supply. battery. This guide assumes that the system wiring. Cause Supply voltage polarity reversed (dc only). a problem with the prime mover fuel supply is indicated. With the EG3P actuator. Woodward 31 . Troubleshooting Symptom Prime mover will not start. linkage. Troubleshooting beyond this level is recommended ONLY when a complete facility for control testing is available.
Manual 82389 Remedy Check for shorted or grounded actuator leads by removing wires to terminals 20 and 21. Adjust LOW IDLE SPEED potentiometer clockwise. Minimum Fuel contact open. Should be about 100 to 300 Ω. Close the switch on terminal 18. or property damage.0 Vac. Check for 18 to 22 volts at terminals 20 and 21 for forward acting controls. Failed speed-signal circuit may be disabled by connecting terminal 16 (or terminal 0 on high voltage controls) to terminal 18. and at least 5% of the minimum rated speed frequency range.) Cause No actuator voltage at terminals 20 and 21. magnetic pickup may be open-circuited or shorted. Check wiring for proper connection. to protect against runaway or overspeed with possible personal injury. turbine. Check speed sensor frequency versus control part number. Speed sensor not spaced properly—check for at least 1. Check for at least 1 Vrms at terminals 28 and 29. Make resistance check with the leads disconnected from control. Speed setting too low on initial start. Control should be set for rated speed.2301A LSSC Symptom Prime mover will not start. Actuator not moving to start-fuel position. (cont. Speed setting may be lower than cranking speed. See "Minimum Fuel Contact" in Chapter 2. Check for 20 to 40 Vdc from terminal 17 (+) to 15 (–). If less that 1.0 Vac at terminals 28 and 29 during cranking. Stop prime mover. magnetic pickup may be spaced too far from gear. short terminal 23 to 24. Control may be the wrong speed range. 32 Woodward . Check T 17. LOW IDLE SPEED setting may be set too low. and 0 to 1 volt for reverse acting controls. WARNING—START-UP Be prepared to make an emergency shutdown when starting the engine. or other type of prime mover. Speed sensor signal not clearing failed speed signal circuit. Increase RATED SPEED setting clockwise. return RATED SPEED setting to normal start position—full counterclockwise. CAUTION—RATED SPEED SETTING If adjusting RATED SPEED setting clockwise does not produce the correct output. loss of life. Minimum-fuel contact must be closed for normal operation. If no voltage is present. Make sure there are no metal chips on end of pickup. Check shields for proper installation.
terminal 0. 18. 2301A LSSC Remedy Verify that terminals 23 and 24 are jumpered if optional external speed trim is not used. Prime mover overspeeds only on starts. Faulty 2301A control. Faulty speed trim potentiometer. 2301A control amplifier. (cont. GAIN adjustment made too Make GAIN adjustment slowly. linkage is properly adjusted. Cause Terminals 23 and 24 are open. Magnetic pickup and 2301A Check the magnetic-pickup output voltage control. Prime mover has momentary speed change when adjusting GAIN. Determine if the fuel rack is quickly following the actuator input voltage. check speed trim potentiometer(s) with an ohmmeter. 2301A control. Fuel Limit can be bypassed if MPU signal clears in less than 1 second. This decreases acceleration rate (from low idle to rated). RATED SPEED setting too high. If actuator moves toward minimum fuel during overspeed. Woodward 33 . On power up. If the control does not cut back the actuator voltage [T20 (+) and T21 (–)] until the speed setting is completely counterclockwise (or does not reduce fuel at any position). Check for proper operation of prime-mover fuel system. Determine if engine is Verify that fuel rack is not binding and malfunctioning.0 Vrms. Connect + source for these terminals to Common + source for contacts connected to terminals 14. If magnetic pickup should fail and the override-failed-speed-signal circuit is disabled. the 2301A control will call for maximum fuel. If the voltage is cut back. RESET may be adjusted too low. at speeds above idle-at least 1. Control the prime mover manually at rated speed and adjust the RATED SPEED setting fully counterclockwise. and 19 taken from terminal 16 instead of from terminal 0. Ramp adjustment. Amplifier may be adjusted for sluggish operation. Set RATED SPEED as described in Chapter 3. look for a problem in the linkage or actuator. If speed range is correct for the application. or may have the wrong speed range. Start Fuel Limit is inactive. Replace control. Prime mover overspeeds or causes excessive smoke only on starts. With power OFF. increase RESET setting. Power up 2301A before cranking engine. momentary speed changes when adjusting GAIN is normal. problem is in fuel system. the 2301A control may be faulty. Increase RAMP TIME (clockwise). Slowly adjust GAIN for fastest stable response. Prime mover overspeeds after operating at rated speed for some time. replace the control. Small quickly. 17. causing overspeed on start. Actuator not moving to start-fuel position. check for proper speed range switch adjustment as described in Chapter 2. Amplifier adjustment. not 16. If the output voltage is not zero. Check operation of overspeed protection device(s). Prime mover.) Prime mover will not start (high-voltage control).Manual 82389 Symptom Prime mover will not start.
Control may be erratic. A faulty Close for Rated contact may remain in the accelerate position with the contact open.2301A LSSC Symptom Low speed is not regulated by LOW IDLE SPEED potentiometer. or the LOW IDLE SPEED setting should be raised. Turn LOW IDLE SPEED setting counterclockwise with terminal 19 open. The instability may occur at no load or it may vary with load. If adjustment of the LOW IDLE SPEED potentiometer causes erratic behavior. and ACTUATOR COMPENSATION as described in "Adjust for Stable Operation" and "Dynamic Adjustment" in Chapter 3. the minimum fuel stop rpm setting will vary with prime mover temperature. The engine will be maintained at the minimum-fuel position by the actuator or the prime mover minimum-fuel stop. Check Close for Rated contact. Adjust GAIN. Remove wire from terminal 19. loss of idle control may be due to a faulty circuit. If the Close for Rated contact is operative. 2301A control. WARNING—OVERSPEED The speed-setting controls have sufficient range to override the ramp and bring the prime mover speed up to rated while still In the low-idle mode (either by defect or switching). a Close for Rated contact that is intermittent may cause the prime mover to overspeed if the RATED SPEED setting is adjusted for rated speed with T19 open. Prime mover will not stabilize at rated no load speed. RESET. The conditions above indicate that the prime mover minimum-fuel position should be decreased by linkage adjustment (diesel engine) or low-idle set screw (gas engine). Cause NOTE On carbureted prime movers. replace the control. Faulty Close for Rated contact. 34 Woodward . 2301A control ramp circuitry. Prime mover should decelerate. Adjustment of LOW IDLE SPEED should not affect prime mover speed when the Close for Rated contact is closed. LOW IDLE SPEED set fully clockwise. Therefore. LOW IDLE SPEED potentiometer. the 2301A control may be faulty. If the above action does not correct the problem. In this case. the output voltage to the actuator will be zero. An improper cold setting may give interference with the LOW IDLE SPEED setting when the prime mover is hot. Prime mover does not decelerate when Close for Rated contact is open. adjustment of LOW IDLE SPEED will vary the speed of the prime mover with the Close for Rated contact in the decelerate (open) position. In general. Manual 82389 Remedy The LOW IDLE SPEED setting may be below the minimum-fuel position of the actuator or prime-mover fuel stop.
Remove the wires to the minimum-fuel contact at terminal 17. If the prime-mover operation is significantly improved by the above modifications. caused by wiring carrying an ac voltage. Be sure linkage is non-linear on carbureted prime movers. check potentiometer with ohmmeter for erratic behavior (turn power off). Necessary external wires not properly shielded. Use non-lubricating electrical cleaner if necessary. and remove wires to the Close for Rated contact. Make sure that actuator moves approximately 2/3 of its travel from no load to full load. (cont. Verify that the switchgear frame. replace control. Control may be erratic. stray magnetic fields from transformers. Noise will cause instability if picked up by lines associated with the amplifier summing point such as external speed trim. Woodward 35 . 14. Electrical noise. and fuel-injected prime movers. The instability may occur at no load or it may vary with load. jumper terminals 23 and 24. governor chassis. WARNING—OVERSPEED Prime mover may overspeed if jumper is installed while running. Jumper terminal 19 to terminal 16 (terminal 0 on high voltage controls). Jumper 14 and 16. replace the wiring one at a time to locate the source of the trouble. 12. CAUTION—SINGLE UNIT Do not perform these tests in other than single-unit operating configuration. etc. Temporarily remove the battery-charger cables from the control battery system. and prime mover have a common ground connection.. 11.) Cause Speed setting controls. 25. Where an external speed trim is used.Manual 82389 Symptom Prime mover will not stabilize at rated no load speed. Refer to actuator manual for proper installation. and 26. and synchronizer input. 2301A LSSC Remedy If adjustment of external speed trim causes instability. can be picked up by improperly shielded wire. Remove wires to terminals 10. and remove wires to the potentiometer. External wiring may require additional shielding or rerouting from high-current lines or components. droop contact. magnetic pickup lines. Be sure linkage is linear on turbine. paralleling lines. If internal speed potentiometer is faulty. The following tests will isolate noise and interference. (continued below) Improper linkage adjustment. diesel.
it will be necessary to remove the 2301A control from the switchgear. Check actuator per appropriate actuator manual. Faulty RATED SPEED or Speed Trim potentiometer. Check by replacing Speed Trim with jumper and setting speed with main speed potentiometer. Prime mover may be causing speed variations. Control may be erratic. Temporarily mount it next to the prime mover and connect only a battery. After starting the prime mover. Control engine manually to determine if instability is in prime mover or governor control. Prime mover not operating properly. The instability may occur at no load or it may vary with load. magnetic pickup. or excessive loading. Shield all wires to the control. and actuator to the control (use a separate battery placed next to the prime mover). It should be at least 20 Vdc on low voltage controls and 90 Vdc or 88 Vac on high voltage controls. Verify a steady fuel pressure of proper value. If necessary. apply load to check stability. return the control to the switchgear. (cont. Speed-setting control does not regulate speed.) Manual 82389 If the problem cannot be resolved by the above checks. Run new magnetic pickup. Tie the outer shield to system ground at end opposite of the control. binding. Input voltage low.2301A LSSC Symptom Prime mover will not stabilize at rated no load speed. place a small jumper wire across terminals 19 and 16 to cause the prime mover to accelerate to rated speed.) Cause Remedy (cont. Check supply voltage. Prime mover may not be receiving fuel as called for by the actuator voltage. If stability occurs when the control is mounted next to the prime mover. and battery power lines. Verify proper adjustment of fuel control linkage. Route all wires through conduit or an outer shield. actuator. Check actuator linkage to fuel controlling mechanism for any lost motion. 36 Woodward .
Manual 82389 Symptom Prime mover does not share load with other units. With the prime mover operating in single unit configuration. NOTE High voltage controls can only be measured from terminal 14 to 18 if the close to override failed speed signal contact is not closed. If it is not. If droop occurs near the full-load point only. Unequal speed settings. Check for 18 to 40 Vdc from terminal 14 to 15 on low voltage controls. If actuator has a ballhead backup.0 Vdc. speed setting. Circulating currents between generators. Prime mover. Cause Prime mover not receiving fuel as called for by the governor. visually determine if actuator shaft is at maximum position. Actuator. LOAD GAIN must be set at 6. See "Load Gain Adjustment" in Chapter 3. Check auxiliary circuit breaker and droop contacts. Perform phasing procedure in Chapter 3. and speed droop adjustments are properly set (see the applicable governor manual). 2301A LSSC Remedy If voltage to actuator is maximum (minimum for reverse-acting). Improper load-sensing phasing. verify that its hydraulic governor section. Unequal load-gain voltages. or is being overloaded. Either is indicated if the fuel control is at maximum position. it is possible the prime mover is not producing the power called for by the fuel control. Circuit breaker auxiliary contact or droop contact is open. or the linkage or fuel system is restricted. Prime mover does not maintain constant speed (isochronous). Be sure that speed settings of all units at no load are identical. Woodward 37 . an actuator problem is indicated. Refer to appropriate voltage regulator manual.
If the core (field unit) is returned to Woodward within 60 days. your problem can be resolved over the phone. providing a suitable unit is available at the time of the request.] Return Shipment Authorization Label. Charges for the Replacement/Exchange service are based on a flat rate plus shipping expenses. Service Options Product Service Options The following factory options are available for servicing Woodward equipment. the following options are available: • Consult the troubleshooting guide in the manual. Without the authorization label. or in advance of a scheduled outage. Woodward will issue a credit for the core charge. it can usually be shipped out within 24 hours. 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: • Replacement/Exchange (24-hour service) • Flat Rate Repair • Flat Rate Remanufacture If you are experiencing problems with installation or unsatisfactory performance of an installed system. To ensure prompt receipt of the core. This is also a flat rate structured program and includes the full standard Woodward product warranty (Woodward Product and Service Warranty 5-01-1205). Replacement/Exchange Replacement/Exchange is a premium program designed for the user who is in need of immediate service. This option allows you to call in the event of an unexpected outage. receipt of the returned core could be delayed and cause additional charges to be applied. You replace your field control unit with the like-new replacement and return the field unit to the Woodward facility as explained below (see "Returning Equipment for Repair" later in this chapter). If the unit is available at the time of the call.2301A LSSC Manual 82389 Chapter 6. It allows you to request and receive a like-new replacement unit in minimum time (usually within 24 hours of the request). to request a replacement control unit. [The core charge is the average difference between the flat rate replacement/exchange charge and the current list price of a new unit. thereby minimizing costly downtime. If not. you can select which course of action you wish to pursue based on the available services listed in this section. and avoid additional charges. The core should be repackaged and the return authorization label affixed to the outside of the package. In most cases. A return authorization label is included with every Replacement/Exchange unit that leaves Woodward. • Contact Woodward technical assistance (see "How to Contact Woodward" later in this chapter) and discuss your problem. the package must be properly marked. You are invoiced the flat rate replacement/exchange charge plus a core charge at the time the replacement unit is shipped. 38 Woodward .
This program offers you repair service for your products with the advantage of knowing in advance what the cost will be. attach a tag with the following information: • name and location where the control is installed. • packing materials that will not damage the surface of the unit. Packing a Control Use the following materials when returning a complete control: • protective caps on any connectors. • a strong tape around the outside of the carton for increased strength. • name and phone number of contact person. • complete Woodward part number(s) and serial number(s). This option is applicable to mechanical products only. Returning Equipment for Repair If a control (or any part of an electronic control) is to be returned to Woodward for repair.Manual 82389 2301A LSSC Flat Rate Repair Flat Rate Repair is available for the majority of standard products in the field. All repair work carries the standard Woodward service warranty (Woodward Product and Service Warranty 5-01-1205) on replaced parts and labor. Guide for Handling and Protection of Electronic Controls. Printed Circuit Boards. industry-approved packing material. • instructions describing the desired type of repair. • description of the problem. please contact Woodward in advance to obtain a Return Authorization Number. read and observe the precautions in Woodward manual 82715. • at least 100 mm (4 inches) of tightly packed. and Modules. CAUTION—ELECTROSTATIC DISCHARGE To prevent damage to electronic components caused by improper handling. • antistatic protective bags on all electronic modules. Woodward 39 . When shipping the item(s). Flat Rate Remanufacture Flat Rate Remanufacture is very similar to the Flat Rate Repair option with the exception that the unit will be returned to you in "like-new" condition and carry with it the full standard Woodward product warranty (Woodward Product and Service Warranty 5-01-1205). • a packing carton with double walls.
Replacement Parts When ordering replacement parts for controls. include the following information: • the part number(s) (XXXX-XXXX) that is on the enclosure nameplate. Contact a Woodward customer service representative at 1 (800) 523-2831 in North America or +1 (970) 482-5811 for instructions and for a Return Authorization Number.2301A LSSC Manual 82389 Return Authorization Number When returning equipment to Woodward. 40 Woodward . NOTE We highly recommend that you make arrangement in advance for return shipments.woodward. USA Telephone—+1 (970) 482-5811 (24 hours a day) Toll-free Phone (in North America)—1 (800) 523-2831 Fax—+1 (970) 498-3058 For assistance outside North America. No work can be started until a purchase order is received. call one of the following international Woodward facilities to obtain the address and phone number of the facility nearest your location where you will be able to get information and service. To expedite the repair process. How to Contact Woodward In North America use the following address when shipping or corresponding: Woodward Governor Company PO Box 1519 1000 East Drake Rd Fort Collins CO 80522-1519.com) for the name of your nearest Woodward distributor or service facility. • the unit serial number. They will help expedite the processing of your order through our distributors or local service facility. contact Woodward in advance to obtain a Return Authorization Number. which is also on the nameplate. Facility Brazil India Japan The Netherlands Phone Number +55 (19) 3708 4800 +91 (129) 230 7111 +81 (476) 93-4661 +31 (23) 5661111 You can also contact the Woodward Customer Service Department or consult our worldwide directory on Woodward's website (www. please telephone and ask for the Customer Service Department [1 (800) 523-2831 in North America or +1 (970) 482-5811]. and arrange for issue of a purchase order for the item(s) to be repaired.
email us. will assure that you will be able to maintain system reliability and availability. or use our website and reference Customer Services and then Technical Support. please contact us via telephone.com Technical Support is available through our many worldwide locations or our authorized distributors. For these services. This service can assist you with technical questions or problem solving during normal business hours. For information concerning training. This training. please contact us via telephone. Emergency assistance is also available during non-business hours by phoning our toll-free number and stating the urgency of your problem. Woodward 41 . depending upon the product. For field service engineering assistance. email us. which can be tailored to your needs and can be held at one of our locations or at your site. depending on the product and location. please contact us via telephone. For technical support.com Website—www. email us. from one of our many worldwide locations or from one of our authorized distributors. The field engineers are experienced both on Woodward products as well as on much of the non-Woodward equipment with which our products interface. or use our website and reference Customer Services and then Technical Support. or use our website and reference Customer Services and then Product Training. conducted by experienced personnel. • • • Technical Support Product Training Field Service Contact information: Telephone—+1 (970) 482-5811 Toll-free Phone (in North America)—1 (800) 523-2831 Email—icinfo@woodward. Product Training is available at many of our worldwide locations (standard classes).Manual 82389 2301A LSSC Engineering Services Woodward Industrial Controls Engineering Services offers the following aftersales support for Woodward products. or through the Woodward website.woodward. Field Service engineering on-site support is available. We also offer customized classes. by email. you can contact us by telephone.
please have the adjustment setting positions or the menu settings written down and with you at the time of the call. etc) Rating Application Control/Governor Information Please list all Woodward governors. steam. gaseous. actuators. 42 Woodward .2301A LSSC Manual 82389 Technical Assistance If you need to telephone for technical assistance. 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 Control Description or Governor Type Serial Number Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number If you have an electronic or programmable control. you will need to provide the following information. Please write it down here before phoning: General Your Name Site Location Phone Number Fax Number Prime Mover Information Engine/Turbine Model Number Manufacturer Number of Cylinders (if applicable) Type of Fuel (gas.
open terminals 14 to 16 ±5 Vdc for speed change with Woodward SPM-A synchronizer 0–6 Vdc 7. open terminals 19 to 16 external switch. Low Voltage Directive Certified to the 73/23/EEC COUNCIL DIRECTIVE of 19 February 1973 on the harmonization of the laws of the Member States relating to electrical equipment designed for use within certain voltage limits. 4000–12 000 Hz –40 to +85 °C (–40 to +185 °F) ±5% of rated load with speed setting matched 4 Gs.8 kg (4 lb) gloss powder Regulatory Compliance European Compliance for CE Mark (specified low voltage models only)— EMC Directive Certified to 89/336/EEC COUNCIL DIRECTIVE of 03 May 1989 on the approximation of the laws of the member states relating to electromagnetic compatibility. For use in the United States (Listed 6IN6). 5 to 500 Hz 60 Gs approximately 1. switch activated.2301A Load Sharing and Speed Control General Specifications Power Supply Rating Power Consumption Inputs— Load Sensing Speed Sensor Input Impedance Speed Sensor Speed Trim Speed Setting Idle Speed Select Droop Synchronizer Load Sharing Outputs— Actuator Adjustments— Rated Speed Acceleration Ramp (±Idle to Rated) Actuator Compensation Low Idle Speed Amplifier Gain Reset (Stability) Load Gain Droop Speed Control Range Operating Temperature Load Sharing Vibration Shock Weight Finish 90–150 Vdc or 85–132 Vac for High Voltage models 20–40 Vdc for Low Voltage models less than or equal to 15 W nominal 90–240 Vac 3ø 45–66 Hz 3ø current transformer input 100–300 Ω magnetic pickup 1. close terminals 19 to 16 time constant compatibility 0–500 ms 55% rated 6 Vdc maximum at 5 A CT current 0 to 10% switch selectable. 500–1500 Hz. internally adjustable 100 Ω potentiometer allows external 0–10% speed trim external switch. 2000–6000 Hz (standard).0 Vac minimum to 30 Vac maximum 0–100 Ω for 0 to 10% speed change terminals 23–24 jumpered. . North American Compliance: UL: UL Listed for Ordinary Locations.5 Vdc max for 0 to 214 mA with 35 Ω coil 11 450 Hz 0–10 s. 1000–3000 Hz.
Declarations .
woodward. subsidiaries.We appreciate your comments about the content of our publications. USA 1000 East Drake Road. Complete address / phone / fax / email information for all locations is available on our website. USA Phone +1 (970) 482-5811 • Fax +1 (970) 498-3058 Email and Website—www. and branches.com Please include the manual number from the front cover of this publication. 06/6/F . Send comments to: icinfo@woodward. as well as authorized distributors and other authorized service and sales facilities throughout the world.com Woodward has company-owned plants. Fort Collins CO 80522-1519. PO Box 1519. Fort Collins CO 80525.
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from £109 / night help Price for guests, Nights
- 3 bedrooms
- 6 sleeps
- min stay varies
Villa / 3 bedrooms / 2 bathrooms / sleeps 6
Key Info
- Beach / lakeside relaxation
- Not suitable for children
- No pets allowed
- Private garden
Description from owner
More Less
Bed & bathroom
- 3 Double Beds
- 1 Family bathroom, 1 Shower room
- Private garden
- Parking
- Not suitable for wheelchair users
- Check in time:14:00, Check out time:10:00
- If you have any questions about check-in or check-out times, please contact the owner/manager.
- Payment
- This rental can only be paid for online through Holiday Lettings using your credit/debit card or PayPal (never by bank or wire transfer).
- Smoking
- No smoking at this property
- Cancellation policy
View Policy
About the owner
Fabio B
- Calendar updated:
- 09 May 2016
Languages spoken: English, Italian
This Villa has 3 bedrooms, 2 bathrooms and sleeps 6. It's been listed on Holiday Lettings since 25 Feb 2014. Located in Trapani, the average weekly rate varies from £734 to £1050.
The property's calendar was last updated on 09 May 2016.
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subset: commoncrawl


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Norwalka s City Manager Sees Resurgence in Central L.A. County
There are 1 comment on the Business Wire story from Feb 26, 2014, titled Norwalka s City Manager Sees Resurgence in Central L.A. County. In it, Business Wire reports that:
At Friday's annual State of the City address, Egan outlined Norwalk's "2020 Vision" strategic action plan, calling for continued collaboration with neighboring communities like Downey, Cerritos, Santa Fe Springs, and Bellflower.
Join the discussion below, or Read more at Business Wire.
#1 Feb 27, 2014
I fear Mr Egan sees Norwalk thru "Rose Colored Glasses". Having grown up and lived in Norwalk for more than 50 years, I assure you I have seen Norwalk look much better. Perhaps not ever living in Norwalk and only working here for a short time he may sincerely believe in what he says. I say I have seen once nice neighborhoods of single family homes turned into multifamily tenement housing tracts completely overwhelming the infrastructure and available services provided under a single tax/revenue source. It is happening on his watch, under the nose of the antiquated never changing City Council of Norwalk weather or not they choose to address it or even admit it.. It is happening. We WERE a nation of laws, and rules. We are now a nation of selective enforcement of which laws and rules we chose to obey and or enforce on any given day. There can be No Growth, No Prosperity, without structure. Drive around Norwalk tomorrow, count Holiday lights still displayed. Every year the City Of Norwalk makes announcements of the regulations regarding holiday lighting. Let me tell you, no one is listening and no one cares and the CIty of Norwalk is doing nothing about it. I use one small and specific example. There is a Public Safety Officer that follows a street sweeper past every house in Norwalk every single week.. Apparently he doesn't care either.. And he probably doesn't live in Norwalk either.. Only for 8 hours like Mr. Egan..
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