EN
- Overview
- Specifications
- Description
- Applications
- Installation
- Troubleshooting Guide
- FAQ
- Recommended Products
Overview
Place of Origin: |
USA |
Brand Name: |
Woodward |
Model Number: |
9905-021 |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
5-7 days |
Payment Terms: |
T/T |
Supply Ability: |
In stock |
Specifications
|
Model |
9905-021 |
|
Product Name |
Load Sharing Speed Control |
|
Series |
2301A |
|
Manufacturer |
Woodward |
|
Enclosure Type |
Sheet Metal |
|
Load Sharing Input |
0–6 VDC |
|
Dimensions |
38.7 × 18.2 × 6 cm |
|
Weight |
1.86 kg |
|
Actuator operating current |
0-200 mA |
|
Forward/Reverse operation |
Reverse |
|
Actuator cascade/Single |
Single |
|
Adjustable deceleration time |
No |
|
Speed signal frequency range |
500~1500 Hz, 1000~3000 Hz, 2000~6000 Hz, 4000~12000 Hz |
|
Controller |
Low voltage type |
|
Operating power supply |
DC: 20~40 Vdc |
Description
The Load Sharing Speed Control 9905-021 is a reverse-acting, low-voltage controller belong to 2301A controller 9905 series. The Woodward 2301A controller 9905 series is used for speed and load distribution control of generator sets driven by diesel, gasoline, steam turbines, or gas turbines. These types of engines are collectively referred to as prime movers in this manual.
Applications
Diesel Generator Parallel Plants: Ensures balanced load sharing for multiple generator sets during sudden load changes.
Marine Shipbuilding Plants: Provides robust speed and parallel control for ship auxiliary and main generator systems.
Gas Turbine Power Plants: Enables high-precision closed-loop isochronous speed control for turbine engines.
Mobile Emergency Power Vehicle Plants: Maintains stable engine control under battery voltage fluctuations in cold starts.
Oilfield Drilling Power Systems: Stabilizes engine speed under sudden load changes in harsh drilling environments
Installation
Troubleshooting Guide
Fault Symptom: The prime mover cannot start, and the actuator is not in the starting position. (Note: If the actuator is already in the starting position, the problem may be with the prime mover's oil supply system.)
Possible Causes and Solutions
1. Power supply polarity reversed or no power supply: Measure the input pins 16(+) and 17(-) of the controller to check the power supply voltage and polarity.
2. Actuator does not respond to input signal: Measure the voltage output on pins 20(+) and 21(-) of the controller; if there is a signal but the actuator does not move, check the actuator's electrical wiring. Generally, the actuator's internal resistance is <50Ω. If it is a fully electric actuator, the problem may be with the driver.
FAQ
Q: What is the actuator operating current of 9905-021?
A: The actuator operating current range is 0–200 mA.
Q: What is the forward/reverse operating mode of 9905-021?
A: The operating mode is reverse acting.
Q: Does 9905-021 support deceleration time adjustment?
A: No, this model does not support deceleration time adjustment.
Q: What type of controller is 9905-021?
A: This device is a low-voltage controller.
Q: What is the operating power supply voltage of 9905-021?
A: The permissible operating power supply voltage is 20–40 Vdc.
