What to do if Load Signal voltage is too high in Woodward 9907-026?
If the Load Signal voltage is too high and adjusting the LOAD GAIN doesn't lower it, the CT output might be too high. Check for a 5 amp CT output at full load, ensuring it's between 3 and 7 amps. If it's outside this range, change to a higher primary current CT.
What to do if Load Signal voltage is low in Woodward 9907-026?
If the Load Signal voltage is low and adjusting LOAD GAIN won't raise it, it may be due to incorrect phasing of CT and PT wiring, or insufficient CT output. Perform a phasing check and correct the phase wiring if needed. Also, check for a 5 amp CT output at full load, ensuring the CT is between 3 and 7 amps. If it's not, change to a lower primary current CT.
Why Woodward 9907-026 Control Systems engine does not properly share load with other units?
Several factors can cause an engine to not properly share the load with other units. These include the engine not receiving fuel as called for by the governor, unequal speed settings, unequal load gain voltages, improper load sensing phasing, or circulating currents between generators, which are indicated by unequal power factors between generators. Check for maximum voltage to the actuator. If voltage to the actuator is correct but the actuator output shaft is not at maximum position, an actuator or speed control problem is indicated, or the linkage or fuel system is restricted. Ensure that the speed settings of all units at no load are identical and adjust as necessary. Also, check that the load gain setting of all load sharing units is correct and adjust as necessary. Finally, properly ...
Provides essential safety instructions for installation, operation, and servicing of the equipment.
Highlights critical safety warnings related to overspeed, overtemperature, overpressure, and PPE.
Outlines precautions to prevent damage to electronic components from static discharge.
Covers unit mounting recommendations and essential electrical wiring practices for the module.
Lists visual checks required before initial operation of the load sharing module.
Details the procedure for checking and verifying the phasing of current transformers.
Describes how to adjust the load gain potentiometer for proper load signal voltage.
Explains how to adjust the DROOP potentiometer for desired speed droop characteristics.
Provides steps to correct current transformer connections and polarity if phasing is incorrect.
Lists the information needed when requesting technical assistance via telephone.
General| Category | Control Systems |
|---|---|
| Manufacturer | Woodward |
| Part Number | 9907-026 |
| Input Voltage Range | 24 VDC |
| Operating Temperature Range | -40 to 70 °C |
| Communication Protocol | Modbus RTU |
| Output Type | Analog and Digital |
| Mounting Type | DIN Rail |
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