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Initial Testing Industrial computer boards and other parts we are equipped to evaluate are tested to verify functionality and discover possible damage.
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Repair Industrial computer boards are fully diagnosed and repaired by our engineers. Shipping After photos are taken to document the exterior condition of the part, it is packaged and sent to the customer. Who We Are Elite. Features 24 and volt operation Automatic fuel limiting during starts Isochronous load sharing Isochronous or droop speed control Linear idle to rated speed ramp Wide dynamic adjustment range.
Datasheet Download "WoodwardA-datasheet Related Products D. Disclaimer Any product names, logos, brands, and other trademarks or media featured or referred to on Elite. When load sharing with different controls, do not connect the shields at the point where connections are made to the load-sharing-line bus. It is connected in series with terminal 16 on low- voltage models OR with terminal 0 on high-voltage models see the plant wiring diagram, Figure If a Speed Trim pot is used, connect it as shown in the plant wiring diagram, Figure , using shielded wire.
Check for grounds by measuring the resistance from terminal 11 to chassis, and from terminals 15 to The resistance should be infinite. If a resistance other than infinite is obtained, remove the connections from each terminal one at a time until the resistance is infinite.
Page Chapter 3. For normal start-up, the Close For Rated contact should be open if the engine is to start at idle. Apply input power to the control. Diesel Engine Performance Curves Woodward Shut down the engine and activate the Failed Speed Signal Override by closing the override contact. Temporary Wiring for Transformer Phase Correction If the temporary burden resistors described above and shown in Figure are not used, the engine MUST be shut down in addition to removing the load in the following procedure.
Unload the system, remove phase A CT wires from terminals 6 and 7, and connect them to phase C input terminals 8 and 9. Apply full load, measure the load signal, and record this voltage. Page Load Gain Adjustment 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. If your system requires a load-signal voltage as low as 3 V, consult Woodward for suggestions for possible remedies.
If when you close the breaker, the load on the unit increases rapidly, immediately open the breaker and shut the unit down. Page Chapter 4. Description Of Operation Manual Chapter 4.
Description of Operation General The A controls engine speed and, during parallel operation of two or more generators, load sharing. When no signal is detected in the forward-acting type of control, the circuit calls for minimum fuel. In this mode the internal loadsharing- line relay is energized, the droop signal is disabled permitting isochronous load sharing. It is connected in series with terminal 16 and terminal 17 as shown in the Wiring interconnection Diagram.
When the contact is open, the control operates normally, Closing the contact overrides the failed speed signal circuit as may be required for start-up. On some steam turbine systems, the Close to Override Failed Speed Signal contact must be closed in order to allow the actuator to open and provide steam for starting.
When closed, 24 Vdc is applied to terminal 19, and the prime mover can be operated at a speed higher than idle. When the contact is open, the voltage is removed from terminal 19, and the prime mover's speed immediately decelerates to idle. When gear teeth passed through the probe's magnetic field, the flux density is modulated. One complete cycle of voltage is generated for each object passed.
Slowly decrease the GAIN turn the potentiometer counter clockwise or 2. Step load the generator to make sure that the prime mover returns to the proper speed with little overshoot or undershoot of the speed setting. Adjustment of the potentiometer sets the maximum actuator position desired. Shut down the prime mover and activate the Failed Speed Signal Override by closing the override contact.
Demove the Failed Speed Signal Override contact if not required to start the prime mover. Start the prime mover and observe the start time, overshoot of speed setting, and smoke emissions obtained.
If they are not equal, load sharing will not remain proportional as the load varies. Any difference in loads between the units can be corrected by adjusting the Load Gain Potentiometer. If stability problems occur when paralleled at a particular load signal voltage, reduce the voltage by reducing the LOAD GAIN turn the potentiometer counterclockwise , and reduce the load signal voltage setting of all other generators in the system to the same voltage.
When the load signal voltages of all generators in a system are reduced, the load sharing gain will be reduced and this may result in some loss of load sharing sensitivity. If your system requires a load signal voltage as low as 3 volts, consult Woodward for suggestions for possible remedies. Open navigation menu. If a Speed Trim pot is used, connect it as shown in the plant wiring diagram, Figure , using shielded wire.
Check for grounds by measuring the resistance from terminal 11 to chassis, and from terminals 15 to The resistance should be infinite. If a resistance other than infinite is obtained, remove the connections from each terminal one at a time until the resistance is infinite.
Page Chapter 3. For normal start-up, the Close For Rated contact should be open if the engine is to start at idle. Apply input power to the control. Diesel Engine Performance Curves Woodward Shut down the engine and activate the Failed Speed Signal Override by closing the override contact. Temporary Wiring for Transformer Phase Correction If the temporary burden resistors described above and shown in Figure are not used, the engine MUST be shut down in addition to removing the load in the following procedure.
Unload the system, remove phase A CT wires from terminals 6 and 7, and connect them to phase C input terminals 8 and 9. Apply full load, measure the load signal, and record this voltage. Page Load Gain Adjustment 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. If your system requires a load-signal voltage as low as 3 V, consult Woodward for suggestions for possible remedies. If when you close the breaker, the load on the unit increases rapidly, immediately open the breaker and shut the unit down.
Page Chapter 4. Description Of Operation Manual Chapter 4. Description of Operation General The A controls engine speed and, during parallel operation of two or more generators, load sharing. When no signal is detected in the forward-acting type of control, the circuit calls for minimum fuel. The minimum-fuel signal is sufficient to cause the actuator to go to the minimum position if not restricted. Terminal Connections Paralleling There are two basic methods used for paralleling: droop, where speed decreases with load, and isochronous, where speed remains constant.
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