Woodward 9905-096 Automatic Generator Loading Control (AGLC)

Product Overview

The Woodward 9905-096 is an Automatic Generator Loading Control (AGLC) module designed for industrial power generation systems. It manages automatic load transfer, generator power balancing, and load sequencing to ensure stable power distribution across multiple generators operating in parallel. The 9905-096 monitors generator load signals and adjusts engine speed through a precise 1–5 VDC analog control output, improving generator efficiency while preventing overload conditions during dynamic power demand changes.

Key Technical Specifications

• Product Type: Automatic Generator Loading Control (AGLC)
• Series: Woodward Generator Control Systems / 9905 Series
• Input Voltage: 120 VAC nominal (90–132 VAC range)
• Input Voltage (Alternative Spec): 170–264 VAC, 50/60 Hz
• Power Consumption: Approximately 5–10 VA
• Control Output: 1–5 VDC analog speed bias signal
• Output Function: Adjusts governor speed to control generator load
• Generator System: Three-phase AC generator systems
• Voltage Sensing: External potential transformer (PT) input
• Dimensions: 8.5" W × 7.5" H × 2" D (216 × 190 × 51 mm) — varies by source
• Weight: 2.0–2.25 lbs (0.9–1.0 kg)
• Operating Temperature: -40°C to +70°C (-40°F to +158°F)
• Storage Temperature: -55°C to +105°C (-67°F to +221°F)
• Relative Humidity: Up to 95% non-condensing
• Shock Resistance: 60 Gs
• Mounting: Panel-mounted / DIN-rail mountable
• Enclosure: Industrial metal chassis
• Standards: UL and CSA Listed
• Origin: USA

Key Features

• Automatic Load Control: Adjusts generator loading based on real-time demand
• Load Sharing: Distributes load evenly across parallel generators
• Load Sequencing: Automatically starts and stops generators based on priority
• Load Shedding: Sheds non-critical loads during overload conditions
• Engine Protection: Integrated overcurrent, undercurrent, overvoltage, and undervoltage protection
• Real-Time Monitoring: Continuous diagnostics on load levels and engine performance
• Flexible Operation: Supports both manual and automatic control modes
• Fault Logging: Built-in event recording for troubleshooting

Applications

• Industrial power plants with multiple generators
• Emergency backup power systems (data centers, hospitals)
• Marine power generation
• Standby generator stations
• Distributed energy systems

Installation Guide

1. Mount in generator control panel or cabinet
2. Connect 120 VAC power supply (or 170–264 VAC per specification)
3. Wire external potential transformer (PT) for voltage sensing
4. Connect 1–5 VDC analog output to governor speed bias input
5. Wire load demand and engine feedback signals
6. Configure load sharing and sequencing parameters
7. Test automatic loading and unloading functions

FAQ

Q: What is the control output signal?
A: A 1–5 VDC analog speed bias signal that adjusts the governor to increase or decrease generator load.

Q: What power supply does it require?
A: 120 VAC nominal (90–132 VAC range) per primary specification; some sources indicate 170–264 VAC. Verify your specific unit's requirements.

Q: Does it support load shedding?
A: Yes, the AGLC can shed non-critical loads during overload conditions to protect the generator system.

Q: What certifications does it have?
A: UL and CSA Listed for safety compliance.

Model Selection Tips

• 9905-096 is an AGLC module for automatic generator loading control
• Verify input voltage requirement (120 VAC vs. 170–264 VAC) before ordering
• Confirm governor accepts 1–5 VDC speed bias input
• For synchronizer applications, pair with DSLC (9905-708/857) or master synchronizer (9907-005)
• Check if your application requires load shedding capability