Woodward 9905-096 (AGLC) Automatic Generator Load Control Module is engineered for generator paralleling systems. It achieves shock-free soft loading during grid connection and smooth unloading during disconnection, and supports base load control, serving as a core auxiliary device for load sharing and speed regulation systems.Designed for systems requiring power retention upon power failure, it meets industrial reliability standards. Widely used in gas and diesel generator sets as well as turbine power systems, it ensures impact-free load switching and stable system operation.
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Core Advantages
Shock-free load switching: Load rises and falls linearly during grid connection and disconnection, eliminating mechanical impact and grid fluctuation to extend service life of generators and related equipment.
Wide operating adaptability: Compatible with 115/230V AC and 50/60Hz power supply. Operating temperature ranges from -40℃ to +85℃, with 60G shock resistance, suitable for harsh industrial environments.
High compatibility: Matches all Woodward load sharing and speed control systems, compatible with internal and external load sensors, and allows parallel operation of up to 15 units.
Safety redundant design: Equipped with independent overspeed and overtemperature protection circuits. Relay contact rating reaches 10A. Certified by UL/CSA and compliant with international safety specifications.
Easy commissioning and maintenance: Full parameters adjustable via 5 panel potentiometers. Remote control accessible through external potentiometer. Built-in 0-1mA load monitoring output enables maintenance without opening the casing.
Key Product Features
1. Electrical Parameters
Input Voltage: 170-264V AC (230V range) / 88-132V AC (115V range), 50/60HzPower Consumption: 5VA, maximum current 0.10AOutput Signal: 0-1mA (proportional to load); relay contacts 18/19/20 (NO/COM/NC)Load Regulation: Linear adjustable load ramp rate, 5 seconds to 5 minutes for 100% load variation
2. Mechanical & Environmental Specifications
Dimension: 216mm×190mm×51mm (8.5in×7.5in×2in), metal enclosureWeight: 1.02kg (2.25lbs), vibration-proof and corrosion-resistantProtection: Electrostatic protection with isolated PCB design, stable performance under severe EMI interference
3. Functional Characteristics
Automatic grid synchronization: Automatically tracks system load after circuit breaker closing, and connects to load sharing busbar seamlessly once matched.
Smooth disconnection: Unloading signal activates instantly. Circuit breaker trips automatically after load drops to preset value to avoid reverse power.
Base load control: Supports standalone isolated base load and parallel base load for maximum 15 grid-connected units. External 0-3V/0-10mA signals enjoy priority control.
Self-diagnosis function: Power-on self-check and relay status monitoring supported. Offline bench test available for rapid fault diagnosis.
Application Scenarios
Industrial Power StationsParallel operation of multiple diesel and gas generators, realizing soft loading and unloading to ensure uninterrupted factory power supply.
Standby Power SystemsBackup generators for commercial buildings and data centers, enabling seamless and shock-free power switching with municipal grid.
Oil & Gas IndustryTurbine generators on offshore platforms and pipeline compressor stations, delivering stable load control in extreme conditions.
Marine Power SystemsParallel connection of main and auxiliary marine generators, achieving smooth load switching between sailing and anchoring modes.
Distributed EnergyGrid connection of biogas and biomass generators, with base load regulation and load sharing to boost power generation efficiency.
FAQ
Q: Severe load surge occurs during grid connection. How to fix it?A: Adjust the loading rate potentiometer clockwise to slow down, set the ramp time to 10-15 seconds. Ensure single-ended grounding of load sharing cable shield. Calibrate unloading trip level to 0V.
Q: Circuit breaker fails to trip during disconnection.A: Verify relay operation by checking terminals 18-19 (closed) and 19-20 (open). Inspect wiring of momentary normally-open unloading button. Confirm load drops to preset trip level.
Q: Unstable load under base load mode.A: Check 10kΩ external potentiometer wiring with single-ended shield grounding. Set base load limit to 3V. Avoid simultaneous adjustment via external signal and internal potentiometer.
Q: No response after power-up.A: Measure AC voltage 170-264V at terminals 1-4. Check jumper settings: 2-3 shorted for 230V; 1-2 and 3-4 shorted for 115V. Confirm fuse integrity.
Q: Can it replace model 9905-063?A: Yes. 9905-096 suits systems requiring power retention after power failure, while 9905-063 applies to systems with contact opening upon power loss. They share identical wiring and compatible parameters.
Q: Does it support parallel operation? What is the maximum unit quantity?A: Yes. One AGLC module equipped per generator set plus one additional system AGLC. It supports base load control for up to 15 parallel generators.
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