Description
⚙️ Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9903-455 (AGLC)
- Series: AGLC Automatic Generator Loading Control Series
- Product Name: Automatic Generator Loading Control Unit
- Place of Origin: United States
- Condition Status: Brand New / Factory Original Surplus
- Dimensions: Standard Panel Mount Enclosure (Approx. 150mm x 120mm x 60mm)
- Weight: Approx. 1.0 kg
- Original Region: USA Manufacturing Plant
- Input Power Rating: 88-132 VAC, 50 or 60 Hz input power supply
- Power Consumption: Rated for a low power consumption of 2.5 VA
📖 Product Overview & Description
The Woodward AGLC Automatic Generator Loading Control (Part 9903-455) is an electronic control unit designed to automatically manage the rate of loading and unloading for generator sets connected to an electrical grid or shared bus. By regulating the prime mover’s governor smoothly, it eliminates sudden power surges and mechanical shocks during generator loading or parallel tie-in operations.
Engineered with high reliability and precision, the AGLC module ensures stable power transfer and safeguards both the engine and electrical switchgear from rapid thermal and mechanical stress. Its robust construction makes it an ideal solution for industrial power generation, standby systems, and continuous cogeneration applications.
🛠️ Operating Specifications & Usage Methods
Proper installation and correct wiring practices are vital for optimal performance. All control signal wiring, feedback loops, and power supply lines (88-132 VAC) must utilize shielded cables and be physically separated from high-voltage distribution lines to prevent electromagnetic interference and signal distortion.
During system configuration, adjust the loading and unloading rate potentiometer or software settings to match the dynamic capabilities of the prime mover. Verify that the input power frequency (50 or 60 Hz) corresponds correctly with the local electrical supply before energizing the control circuit and conducting live load tests.
⚡ Startup & Shutdown Sequence
Following a structured startup and shutdown sequence protects the prime mover, generator windings, and electrical switchgear from mechanical stress and voltage transients.
- Startup Sequence: First, inspect all auxiliary control circuits, safety interlocks, and circuit breaker mechanisms. Energize the 88-132 VAC input power supply to the AGLC unit and verify that all status indicators show normal operation. Bring the generator up to its rated operational speed and nominal voltage, and synchronize it to the bus. Engage the automatic loading control mode to ramp up active power smoothly according to the preset rate.
- Shutdown Sequence: Begin by initiating the unloading sequence through the AGLC module, allowing the controller to ramp down active power generation gradually until minimum load is achieved. Open the main generator circuit breaker to decouple the unit from the shared electrical busbar. Allow the prime mover to run at a no-load idle state for thermal stabilization cool-down. Issue the stop command to shut down the engine, and finally de-energize the input power supply once all motion has completely ceased.
❓ Frequently Asked Questions (Q&A)
- Q1: What is the primary function of the Woodward 9903-455 AGLC?
- A1: It automatically controls the rate of loading and unloading for generator sets, ensuring smooth active power transitions and preventing thermal or mechanical shock.
- Q2: What input power supply and frequency range does this specific model require?
- A2: It operates on an input power supply of 88-132 VAC at either 50 or 60 Hz.
- Q3: What is the power consumption rating of the AGLC unit?
- A3: The unit features an energy-efficient power consumption rating of 2.5 VA.
