The Woodward 8444-1067 (also identified as MFR 300-75M) is a multifunction measuring transducer designed for high-precision monitoring of single- and three-phase power systems. Utilizing advanced digital processing, the module accurately measures true RMS values, ensuring reliable data even in environments with harmonics or electrical interference. It is commonly used as a sensing and decoupling interface in power generation and distribution systems.
For availability or technical inquiries, please visit our 8444-1067 contact page.
Technical Description and Parameters
The 8444-1067 acts as a bridge between the primary power source and supervisory control systems (such as PLCs or SCADA), providing real-time electrical parameters via high-speed communication buses.
- Model Series: MFR 300 (Multifunction Relay)
- Measurement Inputs: 3 True RMS Voltage Inputs, 3 True RMS Current Inputs
- Accuracy: Class 0.5 (Voltage/Frequency/Current), Class 1.0 (Power/Energy)
- Communication: CANopen and Modbus RTU protocols supported
- Power Supply: 24V DC (Typically 18 to 30V DC range)
- Calculated Values: Real Power (kW), Reactive Power (kvar), Apparent Power (kVA), Power Factor (\cos\phi)
- Output Relays: 4 Freely configurable change-over relays + 1 “Ready for Operation” relay
Product Datasheet Specifications
- Dimensions: 100 mm x 115 mm x 75 mm (Standard MFR housing)
- Weight: 0.50 kg (1.10 lbs)
- Country of Origin: Germany
- Mounting: 35mm DIN rail mounting
- Operating Temperature: -20°C to +70°C
- Enclosure Rating: IP20
Application Fields
The 8444-1067 is primarily utilized in sectors requiring rigorous grid monitoring and mains decoupling:
- Mains Decoupling: Monitoring for undervoltage, overvoltage, and frequency shifts to safely disconnect distributed generators from the grid.
- Renewable Energy: Integrated into wind and solar inverter stations for precise power metering and FRT (Fault Ride-Through) monitoring.
- Genset Controls: Providing high-accuracy feedback to Woodward easYgen controllers for load sharing and synchronization.
- Industrial Power Quality: Analyzing harmonics and power factor in heavy manufacturing facilities to optimize energy usage.
Product Instructions for Use
- Wiring Safety: Ensure all CT (Current Transformer) circuits are shorted or connected to the load before powering the system to avoid high-voltage transients.
- Configuration: Use the Woodward ToolKit service tool or the front-panel interface (if equipped) to set the CT and PT ratios to match your primary hardware.
- Communication Setup: Define the Node ID and Baud Rate for CANopen or the Slave ID for Modbus. Ensure termination resistors are applied at the ends of the communication trunk.
- Relay Logic: Configure the trip setpoints and delay timers (adjustable from 0.02s to 300s) to align with local grid code requirements or protection schemes.
Q&A: Frequently Asked Questions
Q: Is the 8444-1067 compatible with the older MFR 2 series?
A: While they serve similar functions, the 8444-1067 (MFR 300) offers significantly higher processing power and digital communication options (CANopen/Modbus) compared to the analog-heavy MFR 2.
Q: Can this module be used as a standalone protection relay?
A: Yes. It includes configurable trip/control setpoints and relay outputs that can actuate breakers independently of a central PLC.
Q: Does the module store energy data during a power loss?
A: The MFR 300 series includes non-volatile memory that retains kWh and kvarh counters, ensuring data continuity after a reboot.
Related Product News
Woodward has recently designated the MFR 300 series as a key component for “Grid Code Compliance” in European and North American markets. As utilities enforce stricter requirements for Fault Ride-Through (FRT) and mains decoupling, the 8444-1067 remains a preferred choice due to its high accuracy and rapid response times. Recent firmware enhancements for the 8444-1067 focus on improved interoperability with the easYgen-3000XT series, allowing for “Plug-and-Play” integration where the controller automatically detects and configures the transducer over the CAN bus, reducing commissioning time for complex multi-generator microgrids.
