Woodward 8273-128 Load Sharing Speed Control | 2301D-ST Governor

Woodward 8273-128 Load Sharing & Speed Control Module | 2301D-ST Digital Governor

The Woodward 8273-128 is an advanced digital load sharing and speed control module from the proven 2301D-ST series, engineered to deliver precise turbine governing for critical power generation, marine propulsion, and industrial drive applications. Combining robust hardware with intelligent control algorithms, this module ensures stable operation, seamless load distribution, and rapid response to dynamic load changes.

Technical Specifications

• Model: 8273-128 (2301D-ST Series)
• Control Type: Digital PID with load sharing capability
• Speed Accuracy: ±1% of rated speed under steady-state conditions
• Input Voltage: 18-32 VDC (nominal 24 VDC)
• Power Consumption: <15W typical
• Communication Protocols: Modbus RTU (RS-485), CAN 2.0B
• Operating Temperature: -40°C to +70°C (-40°F to +158°F)
• Storage Temperature: -55°C to +85°C
• Humidity: 5% to 95% non-condensing
• Enclosure Rating: IP54 (NEMA 12 equivalent)
• Mounting: DIN rail or panel mount
• Dimensions: 220 mm × 150 mm × 65 mm
• Weight: 4.5 kg
• Certifications: CE, UL, cUL, ATEX Zone 2 (optional)

Key Features & Performance Benefits

Precision Load Sharing: Distributes electrical or mechanical load evenly across multiple turbines or generators, preventing overload conditions and optimizing fuel efficiency across parallel units.

Adaptive Speed Control: Real-time PID tuning adjusts to varying load profiles, maintaining stable speed regulation even during rapid load acceptance or rejection events.

Multi-Protocol Connectivity: Integrated Modbus RTU and CAN interfaces enable seamless integration with SCADA systems, PLCs, and distributed control networks for centralized monitoring and diagnostics.

Rugged Industrial Design: Conformal-coated PCBs and sealed connectors ensure reliable operation in harsh environments including offshore platforms, desert installations, and high-vibration industrial sites.

Hot-Swap Redundancy Support: Compatible with redundant configurations for mission-critical applications where downtime is unacceptable.

Application Scenarios

Power Generation Plants: Coordinate multiple gas or steam turbines in combined-cycle plants, ensuring balanced load distribution and grid stability during peak demand periods.

Marine Propulsion Systems: Govern diesel or gas turbine engines in naval vessels, cruise ships, and offshore supply vessels, maintaining precise shaft speed control during maneuvering and transit operations.

Oil & Gas Facilities: Control compressor and pump drive turbines in upstream production, midstream processing, and LNG terminals where process stability is paramount.

Industrial Cogeneration: Manage turbine-driven generators in manufacturing facilities, refineries, and chemical plants to optimize energy efficiency and reduce operational costs.

System Integration & Solutions

The 8273-128 integrates seamlessly with Woodward's ProTech safety systems, providing coordinated overspeed protection and emergency shutdown capabilities. When paired with actuators such as the Woodward 8400-016 EPG Actuator, it forms a complete turbine control solution with precise fuel valve positioning.

For applications requiring advanced turbine control, consider the Woodward 8200-1508 505D Digital Governor, which offers expanded I/O and multi-fuel capability. Alternatively, the Woodward 8516-050 TG-13 Governor provides a cost-effective solution for smaller turbine installations.

Installation & Commissioning

Mount the module in a clean, ventilated control cabinet away from direct heat sources. Connect speed sensors (magnetic pickup or proximity probes) to the dedicated input terminals, ensuring proper shielding to minimize electrical noise. Configure load sharing parameters via the front-panel interface or through the Woodward ToolKit software suite. Perform initial calibration by running the turbine through its operating range and verifying speed accuracy against a reference tachometer.

Frequently Asked Questions

Q: Can the 8273-128 control multiple turbines simultaneously?
A: Yes, when configured in a load sharing network, a single module can coordinate up to 8 turbines via the CAN bus, with each unit maintaining individual speed control while balancing collective load.

Q: What speed sensor types are compatible?
A: The module accepts magnetic pickup (MPU), variable reluctance, proximity probe, and Hall-effect sensors. Input frequency range is 10 Hz to 20 kHz, accommodating turbines from 600 RPM to 12,000 RPM.

Q: Is firmware upgradable in the field?
A: Yes, firmware updates are performed via the RS-485 port using Woodward's ToolKit software. Always consult the latest release notes before upgrading to ensure compatibility with your system configuration.

Q: What is the typical response time for load changes?
A: The control loop executes at 10 ms intervals, with typical settling time of 2-5 seconds for a 50% load step, depending on turbine inertia and actuator response characteristics.

Warranty & Support

All Woodward 8273-128 modules are backed by a comprehensive 12-month warranty covering defects in materials and workmanship. Our technical support team provides application engineering assistance, troubleshooting guidance, and replacement part identification to minimize downtime and ensure optimal system performance.

Package Contents

• 1× Woodward 8273-128 Control Module
• 1× DIN rail mounting bracket
• 1× Terminal block connector kit
• 1× Quick start guide
• 1× Calibration certificate

Note: Speed sensors, actuators, and communication cables are sold separately. Consult our technical team for complete system recommendations tailored to your application.

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